ASAHI KASEI ADVANCE CORPORATION List of Products and Services

We would like to introduce a case where the large block construction method "Circular Conback" was implemented at a forest road collapse site. This site, located deep in the mountains, has frequently experienced collapses of the forest road due to heavy rains and other factors in recent years. Areas repaired with large sandbags deteriorated and collapsed again within a few years, leading to ongoing issues. In the case of repairs using large sandbags, emergency restoration is required, necessitating subsequent removal and full restoration. However, by adopting this method and utilizing locally generated soil and sand for soil-cement filling, it became possible to achieve full restoration immediately. 【Case Overview】 ■ Issues - Frequent collapses of the forest road due to heavy rains and other impacts - Areas repaired with large sandbags deteriorated within a few years and collapsed again ■ Benefits of Implementation - Lightweight materials make placement and construction easy - Immediate full restoration is possible *For more details, please download the PDF or feel free to contact us.

• Other earthworks, foundation works, and exterior floors

We would like to introduce a case study of the construction of a fabric formwork "FabriForm" on the slope beneath the superstructure. This site is nearing the end of the construction period, and there are almost no construction roads or equipment access routes, making it difficult to transport heavy machinery and materials to the site. Therefore, the site contractors were looking for a slope protection method that would achieve labor-saving efficiency. By adopting this method, we were able to shorten the originally planned construction period for the block slope protection work to about one-sixth. We successfully achieved a reduction in the construction period, which pleased our clients. [Case Overview] ■Challenges - Difficulty in transporting heavy machinery and materials to the site - Desire for the application of a labor-saving slope protection method ■Benefits of Implementation - Shortened the originally planned construction period to about one-sixth *For more details, please download the PDF or feel free to contact us.

• Other earthworks, foundation works, and exterior floors

We would like to introduce a case where we proposed the "Conback" method as a riverbed reinforcement technique for urban rivers. In this case, due to heavy rainfall, scouring occurred at the riverbed. As a result, scouring affected the embedded section of the steel sheet pile waterway, leading to deformation of the steel sheet piles. As a countermeasure, we implemented this method for the riverbed protection work and carried out the reinforcement work. 【Case Overview】 ■ Issues - Scouring occurred at the riverbed due to heavy rainfall. - There is an urgent need to carry out riverbed protection work. - The site is an urban river, making it difficult to use large machinery for construction. ■ Countermeasure Method - Reinforcement work was carried out. - By connecting, an integrated riverbed protection structure could be constructed. *For more details, please download the PDF or feel free to contact us.

• River construction

We would like to introduce a case where a water-resistant sheet and block mat (Solcomat) revetment method were adopted for emergency disaster recovery of rivers. In this site, due to the impact of prolonged heavy rainfall, flooding and landslides occurred. There was an urgent need to implement disaster recovery measures as part of an emergency water control project. Our product can be delivered in about 10 to 14 days as the shortest manufacturing lead time, and it has a proven track record of use in numerous applications such as rivers and ponds. 【Features of the adopted method】 ■ Allows for quick construction, reducing construction time and costs ■ The manufacturing method is an immediate demolding type, enabling shortened delivery times ■ It has a flexible structure integrated with filter cloth, allowing it to adapt to uneven settlement ■ It is excellent in water permeability through the mesh of the filter cloth *For more details, please download the PDF or feel free to contact us.

• River construction

We would like to introduce a case where we proposed the energy-saving joint block method "Solcomat" for the construction of concrete sediment control dams. In this site, it became difficult to install concrete secondary products and rock fragments generated on-site on the slopes. Therefore, we proposed and adopted the construction of a surface protection work that could shorten the construction period. The Solcomat, which is integrated with filter cloth, has a flexible structure that accommodates differential settlement. 【Features of the adopted method】 ■ Enables quick construction, reducing construction time and costs ■ The manufacturing method allows for immediate demolding, enabling shorter delivery times ■ A flexible structure integrated with filter cloth that accommodates differential settlement ■ Excellent permeability through the mesh of the filter cloth *For more details, please download the PDF or feel free to contact us.

• Slope protection material
• Erosion control works

We would like to introduce a case where the "GeoWeb" method, a three-dimensional geocell construction technique for steep slope protection, was adopted. In this project, construction work for a concrete sediment control dam was being carried out, but it became difficult to install concrete secondary products and rocks generated on-site on the slope. With this method, a retaining wall structure can be constructed by filling crushed stone and soil into the deployed GeoWeb and stacking it in a stepped manner. 【Features】 - Lightweight and compact, making transportation and installation on-site easy - Simply stack crushed stone and soil in a stepped manner while filling the deployed GeoWeb - Capable of accommodating curved sections and varying slopes - Suitable for small-scale restoration sites affected by disasters *For more details, please download the PDF or feel free to contact us.

• Slope protection material

We would like to introduce a construction case of the block mat method "Solcomat." When arc sliding failure occurs in river embankments, it can lead to the collapse of the embankment. This results in flooding in the surrounding area, causing significant damage to urban areas. To prevent this, it is necessary to strengthen river embankments and enhance their water impermeability. Our company proposes the installation of water impermeable sheets on river embankments, using this method as a means to secure the sheets. We have achieved numerous applications in rivers, ponds, and other areas. 【Features of the adopted method】 ■ Allows for quick construction, reducing construction time and costs ■ The manufacturing method is an immediate demolding type, enabling shorter delivery times ■ It has a flexible structure integrated with filter cloth, capable of accommodating differential settlement ■ It is excellent in water permeability through the mesh of the filter cloth *For more details, please download the PDF or feel free to contact us.

• River construction

We would like to introduce a case where the fabric formwork method "FabriForm" was adopted for the construction of concrete erosion control dams. In this site, it was difficult to install concrete secondary products and rock fragments generated on-site on the slopes. Therefore, we proposed and implemented this method as a surface protection work that allows construction even with slight slope irregularities and can shorten the construction period. 【Case Overview】 ■Challenges - Difficulty in installing concrete secondary products and rock fragments generated on-site on the slopes. ■Advantages - Construction is possible even with slight slope irregularities, and it can also shorten the construction period. *For more details, please download the PDF or feel free to contact us.

• Erosion control works

We would like to introduce a case where our product, "Geoweb Method," was proposed as a back slope protection work for reinforced embankments. In this project, emergency measures against river flooding damage were implemented, including the reinforcement of river embankments, riverbed excavation, and the removal of trees within the river channel. A simple frame product was desired for the back slope protection of the reinforced embankment. There have been numerous successful applications for back slope protection of river embankments, and our product was adopted. The "Geocell" product, made from high-density polyethylene (HDPE) sheets that are continuously bonded into a three-dimensional honeycomb structure using high-frequency welding, becomes a strong structure by filling the cell structure with infill material. [Case Overview] ■ Issues - A simple frame product is desirable for back slope protection of reinforced embankments. ■ Advantages - Lightweight and flexible, making installation easy. - Fixed on the slope and filled with crushed stone to create a slope protection structure that considers the landscape. *For more details, please download the PDF or feel free to contact us.

• River construction

We would like to introduce a case study of the "Solcomat Slope Reinforcement Method," developed to meet the needs for reinforcing the back of river embankments. In this site, spring water was occurring at the slope, and it was necessary to process drainage holes in the interlocking blocks. The "Solcomat Slope Reinforcement Method" consists of concrete blocks measuring 20cm x 20cm adhered to a filter cloth. There is approximately a 1cm gap between the blocks, allowing the spring water at the site to be discharged to the front side of the slope. [Case Overview] ■ Issues - Spring water is occurring, and it is necessary to process drainage holes in the interlocking blocks. ■ Effects - A gap of about 1cm exists between the concrete blocks, allowing the spring water at the site to be discharged to the front side of the slope. *For more details, please download the PDF or feel free to contact us.

• River construction

We would like to introduce a case where the geotextile reinforcement earthwork method "TRIGRID Steel Wall Material Geometaframe" was adopted for disaster recovery. In this site, due to heavy rain, a collapse occurred on a small municipal road leading to the mountain top. The affected area was near the mountain top, making it difficult to transport materials and carry out construction for disaster recovery. By adopting this method, it became possible to construct a recovery road even in a narrow site, allowing for the restoration of the road. 【Case Overview】 ■ Challenges - The method allows for easy transportation of materials and can be implemented with small-scale construction equipment. ■ Effects - Enabled the construction of a recovery road even in a narrow site. *For more details, please download the PDF or feel free to contact us.

• Earth retaining wall/foundation reinforcement

We would like to introduce a construction case of the fabric formwork "FabriForm" used in the emergency measures for temporary drainage works. In this site, a large-scale landslide disaster occurred in a mountainous area due to heavy rain caused by a large typhoon. It was necessary to construct a temporary drainage channel to drain a large amount of water that was accumulating urgently. Therefore, we proposed the use of fabric formwork "FabriForm" as a surface protection work that could shorten the construction period, and it was adopted. 【Features】 ■ Can be constructed with a small number of workers and in a short time, leading to reduced construction period and cost ■ Can be constructed underwater ■ Can be constructed in places where heavy machinery cannot enter ■ Mats can be produced to fit the shape of the site *For more details, please download the PDF or feel free to contact us.

• Formwork material
• Other civil engineering works

We would like to introduce a case where the soft subgrade improvement method "Geotextile Long Fiber Non-Woven Fabric (Posible) Installation Method" was proposed in the road design associated with the reconstruction of agricultural roads. In this site, there were buried utilities such as pipes within the subgrade, making it difficult to adopt large-scale ground improvement methods. Therefore, by proposing design considerations based on the "Design and Construction Manual for Pavement on Soft Subgrade Using Geotextiles" (Soil and Ground Research Center), we were able to suggest a simple cross-section modification. 【Features】 ■ Excellent mechanical properties such as tensile strength ■ Superior water resistance, oil resistance, weather resistance, corrosion resistance, chemical resistance, and heat resistance ■ Long-term stability in soil ■ The sheet has a three-dimensional structure, providing excellent water permeability and filtration performance ■ Lightweight and compact, making transportation and installation easy, allowing for simple construction *For more details, please download the PDF or feel free to contact us.

• Ground foundation construction method

We would like to introduce a case where a fabric formwork "FabriForm" was adopted for the construction of a retention basin aimed at suppressing rainwater drainage associated with roadworks. At this site, an alternative construction method was required due to the need to remove groundwater in order to carry out the originally designed cast-in-place concrete. Therefore, we proposed and implemented this method as a surface protection work that allows construction even with some groundwater present, while also shortening the construction period. 【Features】 - Possible to construct with fewer workers and in a shorter time, leading to reduced construction period and costs - Construction possible underwater - Can be implemented in areas where heavy machinery cannot access - Mats can be produced to fit the site shape *For more details, please download the PDF or feel free to contact us.

• Formwork material
• Other civil engineering works

We would like to introduce a case where the effectiveness of crisis management-type hard measures for levee toe reinforcement was confirmed. In the Arakawa River system, at a location where crisis management-type hard measures were implemented due to Typhoon No. 19, overflow occurred (with a water depth of about 25 cm during the overflow), but there was a case where the levee did not breach. The "Solcomat toe reinforcement method" proposed by our company can be used for crisis management-type hard measures. 【Proposed Construction Method】 ■ Solcomat Toe Reinforcement Method - Extends the time until river levee destruction during overflow at a water depth of 20 cm - Highly effective in reducing the depth of scour directly beneath the levee foundation - This content has been reported at the Soil Mechanics Society research presentation *For more details, please download the PDF or feel free to contact us.

• Slope protection material
• River construction

We would like to introduce a case where a high-strength fiber sheet (public sheet) was laid on a super weak ground, and surface bearing capacity reinforcement was implemented. In this site, the ground was weak and did not maintain the bearing capacity necessary for construction vehicles to pass as a construction road, necessitating reinforcement of the bearing capacity for the construction road. By laying the public sheet, the surface bearing capacity of the weak ground was reinforced, allowing construction vehicles to operate on the ground, and enabling the separation and protection of embankment soil and farmland soil. 【Case Overview】 ■ Issues - After using the land as a construction road, it is necessary to return it to its original soil condition. - There is a need to reinforce the bearing capacity for the construction road. ■ Effects - The surface bearing capacity of the weak ground was reinforced, allowing construction vehicles to operate on the ground. - It was possible to separate and protect the embankment soil and farmland soil. *For more details, please download the PDF or feel free to contact us.

• Ground foundation construction method

We would like to introduce a case where the "Solcomat Method" was adopted as a countermeasure for overflow damage on river levees. Experiments confirmed that it effectively prolongs the time until levee failure during overflow at a water depth of 20 cm and significantly reduces the scouring depth directly beneath the levee foundation. This was explained and proposed to the client. The client adopted the method and was pleased with the results. [Case Overview] ■ Adopted Method: Solcomat Method - A product made by bonding and fixing a permeable synthetic fiber sheet with concrete blocks into a mat shape. - Excellent workability, allowing for shortened construction periods and cost reductions. *For more details, please download the PDF or feel free to contact us.

• River construction
• Earth retaining wall/foundation reinforcement

We would like to introduce a case study of disaster recovery methods for riverbank protection in mountainous areas. In this site, the riverbank collapsed due to increased water flow during heavy rain in a mountainous area. When implementing disaster recovery work, it was necessary to select a method that could utilize local materials as much as possible and had good workability. Therefore, we installed weather-resistant large sandbags on the backfill of the riverbank. As surface protection work, we set up fabric-formwork for the riverbank, and after constructing the riverbank, we carried out in-situ solidification work with a concrete backfill and performed the solidification work. 【Features of Fabric Formwork】 ■ Can be constructed with a small number of workers in a short time, reducing construction period and costs ■ Can be constructed underwater ■ Can be constructed in places where heavy machinery cannot enter ■ Mats can be produced to fit the site shape *For more details, please download the PDF or feel free to contact us.

• Other civil engineering works

We would like to introduce a case where the "Solcomat" energy-saving connected block method was adopted for the restoration work of river levees. In this site, several major earthquakes occurred repeatedly in a short period, causing subsidence of the river levee and cracking of the levee surface. A challenge was the difficulty in procuring materials for emergency restoration of the levee. Our product can sometimes be delivered within a manufacturing lead time of about 10 to 14 days. In this case, the work was completed within one month from the occurrence of the disaster to the completion of the construction. [Case Overview] ■Challenge - Difficulty in procuring materials for emergency restoration of the levee. ■Result - The work was completed within one month from the occurrence of the disaster to the completion of the construction. *For more details, please download the PDF or feel free to contact us.

• Other civil engineering works

We would like to introduce a case where the pneumatic caisson method was adopted for the construction of bridge pier foundations built within a river. In this project, we proposed applying a friction cutter to the exterior of the caisson sinking structure to shorten the embedding time. This approach reduces the friction between the outer perimeter of the caisson sinking structure and the surrounding ground, thereby decreasing the weight of the caisson sinking structure. 【Case Summary】 ■ Issues - If the friction between the surrounding ground and the caisson sinking surface is strong, it takes longer to embed. ■ Results - Reduced friction between the outer perimeter of the caisson sinking structure and the surrounding ground. - Decreased weight of the caisson sinking structure. *For more details, please download the PDF or feel free to contact us.

• Bridge Construction
• Ground foundation construction method

We would like to introduce a case where the mattress method using high-strength geogrid "GeoAce" was adopted on soft ground. In this project, it was found that the load-bearing strength of the box culvert construction site exceeded the ground support capacity, necessitating the consideration of foundation countermeasures. This method made it possible to install a box culvert, which is a heavy structure, on soft ground with a high groundwater level in an economical and construction-friendly manner. 【Case Overview】 ■Challenges - The foundation ground planned for contact was soft ground. ■Results - Surface improvement of the ground was carried out economically. - Effective surface improvement was achieved with minimal improvement area. *For more details, please download the PDF or feel free to contact us.

• Ground foundation construction method

This is an example of implementing a geocell (geo-web) mattress construction method by laying a three-dimensional geocell on weak ground and filling it with crushed stone in layers. In this project, it was necessary to have the required ground support capacity to support the concrete retaining wall structure. The geocell is a product made from high-density polyethylene sheets that are processed into a continuous three-dimensional honeycomb shape using high-frequency welding. This method reinforced the surface support capacity of the weak ground, enhancing its load-bearing capacity. 【Case Overview】 ■Challenges - There was a need to reinforce the support capacity of the ground where the concrete retaining wall would be installed. ■Results - The surface support capacity of the weak ground was reinforced, and the load-bearing capacity was improved. *For more details, please download the PDF or feel free to contact us.

• Ground foundation construction method

We would like to introduce a case where block mats (Solco mats) were adopted for the bank protection method in agricultural reservoir maintenance projects. In recent years, drowning accidents resulting in fatalities have become a problem in agricultural reservoirs and golf course ponds, leading to a demand for disaster prevention measures. The Solco mat disaster prevention type block has a shape that allows for easy grip, taking safety into consideration. This method enables large-scale construction with a small number of workers through machine installation. 【Case Overview】 ■ Issues - Drowning accidents resulting in fatalities have become a problem. ■ Results - Even if someone accidentally falls into the reservoir, they can easily climb back up. - Demonstration experiments confirmed that it is possible to ascend the slope even while carrying a person in need of rescue. *For more details, please download the PDF or feel free to contact us.

• Other civil engineering works

We would like to introduce a case study on measures to prevent water surface drop accidents in pond bank protection construction. At this site, after the installation of fabric formwork, there was a problem where the surface of the fabric formwork became slippery due to moss and other growths on the fabric. In response, we proposed the "Fabric Formwork Disaster Prevention Step Method." This allows for the installation of steps made from fabric formwork at any desired location on the bank slope, enabling the construction of emergency disaster prevention steps. 【Case Overview】 ■ Issues - The surface of the fabric formwork became slippery due to moss and other growths on the fabric. ■ Results - Steps made from fabric formwork were installed at any desired location on the bank slope. - Emergency disaster prevention steps were successfully constructed. *For more details, please download the PDF or feel free to contact us.

• Other civil engineering works

We would like to introduce a case study of step-type revetment construction in agricultural pond embankment works. In this project, a fabric formwork was adopted for the embankment construction of agricultural ponds. After the installation of the fabric formwork, there was an issue where the surface of the fabric formwork became slippery due to moss and other growths on the fabric. To address these issues, we proposed the fabric formwork "Beltail." This allowed us to construct a stepped design on the embankment slope using the fabric formwork, enabling the establishment of a non-regular disaster prevention step. 【Case Overview】 ■Challenges - The growth of moss and other plants on the fabric caused the surface of the fabric formwork to become slippery. ■Results - A stepped design was successfully constructed on the embankment slope using the fabric formwork. - The construction was completed in a short time, resulting in reduced construction time and costs. *For more details, please download the PDF or feel free to contact us.

• Other civil engineering works

We would like to introduce a case study of a pond embankment renovation where bentonite sheets were installed as a waterproof sheet. In this project, a comparison of waterproof sheet methods was conducted, and the bentonite sheet "Volclay Mat," which can exhibit waterproofing functionality semi-permanently, was adopted. After laying the Volclay Mat and covering the embankment fill to shape the slope neatly, a revetment was constructed using the fabric formwork method "Fabric Form Mat Method" as a wave control measure. 【Features of Volclay Mat】 ■ Excellent waterproofing and semi-permanent durability ■ Damage-resistant self-healing properties ■ Needle punching to prevent outflow and uneven distribution ■ Natural bentonite that considers the environment ■ Easy to install *For more details, please download the PDF or feel free to contact us.

• Other earthworks, foundation works, and exterior floors

"Reinforced earth wall construction" refers to a method of reinforcing embankments by laying synthetic resin reinforcement materials called geogrids (product name: Trigrid) within the fill, which allows for the construction of nearly vertical wall surfaces through the frictional force between the reinforcement and the soil. By using steel wall materials in conjunction, it is possible to construct embankments with high stability and durability. The laying pattern is determined according to the height of the embankment, allowing for flexible adaptation to sudden changes in road alignment or height. 【Features】 ■ Enables the construction of high-performance access roads in mountainous areas ■ Forest roads capable of withstanding large vehicle traffic ■ Excellent long-term durability, reducing maintenance efforts ■ Easy to construct, requiring no special heavy machinery, and can be executed by ordinary workers ■ Complies with reliable design methods *For more details, please download the PDF or feel free to contact us.

• Reinforced earth wall

We would like to introduce a case where a high-pressure horizontal drainage material was proposed as an alternative method to the sand mat used in PBD construction. In this project, it was necessary to implement a fill height of approximately 12 meters on soft ground, and consolidation settlement of the soft ground was anticipated. Therefore, we proposed the high-pressure horizontal drainage material "Public Drain" as an alternative to the sand mat. By using Public Drain, it became possible to significantly reduce the direct construction costs initially planned for the sand mat. 【Case Overview】 ■Challenges - It was necessary to implement a fill height of approximately 12 meters on soft ground, and consolidation settlement of the soft ground was anticipated. ■Results - Direct construction costs for the initially planned sand mat were significantly reduced. *For more details, please download the PDF or feel free to contact us.

• Ground foundation construction method

This is a case regarding a crack that occurred on the surface of a levee road immediately after the extraction of soil-retaining steel sheets in river construction adjacent to the levee road. When the steel sheets were pulled out at the end of the temporary period, viscous soil adhered to them and was lifted along with the sheets. As a result, a void of the size of the cross-section of the steel sheet type IV + α occurred within the ground. It is estimated that the surrounding ground moved into the void that formed within the ground, causing subsidence on the surface of the surrounding ground and resulting in cracks. 【Countermeasure Proposal】 ■ Apply a friction-reducing agent (friction cutter) to the temporary steel sheets in advance to prevent adhesion between the temporary steel sheets and the ground soil, thereby minimizing the ground voids that occur during the extraction of the steel sheets. *For more details, please download the PDF or feel free to contact us.

• Piles, caissons, sheet piles
• Ground foundation construction method

This is a case where the test water tank sank after pulling out the temporary soil retaining steel sheet pile for the water tank structure work, and the steel sheet pile could not be removed. When the steel sheet pile was pulled out at the end of the temporary period, the viscous soil adhered to it and was pulled up together. As a result, a void of the size of the steel sheet pile plus additional material occurred within the ground. The surrounding ground moved into the void that formed within the ground, and it is estimated that the water tank structure also sank into the void, causing the tank to sink. 【Countermeasure Proposal】 ■ Apply a friction reduction agent (friction cutter agent) to the temporary steel sheet pile in advance to prevent adhesion between the temporary steel sheet pile and the ground soil, thereby minimizing the ground voids that occur during the pulling out of the steel sheet pile. *For more details, please download the PDF or feel free to contact us.

• Piles, caissons, sheet piles
• Ground foundation construction method

We would like to introduce a case where multiple sinkholes occurred in flat areas beside the road less than a year after the completion of road construction on reclaimed land. The areas where the issues occurred used a short-fiber non-woven sand control sheet. It is estimated that the sand control sheet was laid on the stone embankment and was exposed to seawater for a certain period until the soil was filled in. During this time, it is presumed that the short fibers gradually flowed out into the seawater, resulting in a decrease in the thickness and strength of the product. 【Proposed Countermeasure Method】 ■ For sand control sheets used in ports, we recommend long-fiber non-woven fabric "Posible." - Excellent mechanical properties such as tensile strength - Superior resistance to water, oil, weather, corrosion, chemicals, and heat - Long-term stability in soil *For more details, please download the PDF or feel free to contact us.

• Coastal construction
• Ground foundation construction method

This is a case study about a new bridge construction project with a length of approximately 40 meters and two spans, where differential settlement of the bridge piers occurred after the construction of the substructure. Upon examining the collected data, it was found that a cohesive soil layer exists at a depth of more than 2 meters, which is shallower than the depth of the sheet piles. During the extraction of the steel sheet piles, there was soil adhesion from these cohesive soils, resulting in voids within the ground due to the thickness of the steel sheet piles and the attached soil. It is estimated that the surrounding ground moved into the voids that formed within the ground, leading to settlement of the foundation ground. 【Countermeasure Proposal】 - Apply a friction-reducing agent (friction cutter agent) to the temporary steel sheet piles in advance to prevent the adhesion between the temporary steel sheet piles and the ground soil, thereby minimizing the ground voids that occur during the extraction of the steel sheet piles. - By filling the voids that have formed with materials such as cement-bentonite, it is possible to bring the displacement close to zero. *For more details, please download the PDF or feel free to contact us.*

• Ground foundation construction method
• Bridge Construction
• Piles, caissons, sheet piles

We would like to introduce a case study of the "soft ground improvement method." In this project, it was necessary to carry out embankment work on extremely soft ground with an N value of less than 1 and a high groundwater level. The extremely soft ground was not only unsuitable for construction machinery but also impassable for humans. Therefore, it was essential to ensure the trafficability (mobility) of construction machinery when performing the embankment work. By laying down a "public mesh," the surface support capacity of the extremely soft ground was reinforced, making it possible for humans to walk on it. 【Case Overview】 ■ Challenges - The ground was impassable for humans, and it was necessary to ensure the trafficability (mobility) of construction machinery for the embankment work. ■ Results - By placing embankment on the ground where the public mesh was laid, we were able to reduce the sinking of the embankment into the soft ground. *For more details, please download the PDF or feel free to contact us.

• Ground foundation construction method

We would like to introduce a case of "Construction of Grass Prevention Block Mat for Pond Embankment." In this project, it was required to implement slope protection for the agricultural pond embankment at a low cost, as well as to carry out maintenance and management at a low cost. We proposed the "Solcomat Grass Prevention Type," which is a block mat method integrated with a weed prevention sheet. It was adopted, and we confirmed that it maintains a certain level of weed prevention effectiveness even several years after construction. [Case Overview] ■ Issues - It was required to implement slope protection for the pond embankment at a low cost and to carry out maintenance and management at a low cost. ■ Results - A certain level of weed prevention effectiveness has been maintained even several years after construction. *For more details, please download the PDF or feel free to contact us.

• Slope protection material

We would like to introduce a case study of the "GeoWeb Retaining Wall Method" using the 3D Geocell construction method. In this project, it was necessary to implement protective work for a slope that changes from a 5:1 cut slope to a 2:1 slope over a length of approximately 16 meters due to road improvement work. The method adopted is a product made by continuously pressing high-density polyethylene sheets into a honeycomb shape, allowing for the construction of a retaining wall structure by filling the expanded GeoWeb with crushed stone and soil while stacking it in a stepped manner. 【Case Overview】 ■Challenges - It was necessary to implement protective work for a slope that changes from a 5:1 cut slope to a 2:1 slope over a length of approximately 16 meters due to road improvement work. ■Results - By adjusting the setback width while stacking in a stepped manner, it was possible to construct a retaining wall that accommodates the changing slope. *For more details, please download the PDF or feel free to contact us.

• Slope protection material

This document includes the estimated causes and countermeasures learned from the on-site trouble case "Deformation Case of Geocell Retaining Wall during Construction." A few days after the construction began, heavy rainfall occurred in the area, and shortly thereafter, subsidence was observed on the wall side of the geocell retaining wall that was under construction, along with cracks appearing at the top. The document also provides detailed information about the construction method of the three-dimensional geocell method, "Geoweb Retaining Wall Method." We encourage you to read it. [Contents] ■ Site Overview ■ Construction Method: Three-Dimensional Geocell Method "Geoweb Retaining Wall Method" ■ History of Deformation Occurrence ■ Estimated Causes ■ Countermeasures to Prevent Deformation *For more details, please download the PDF or feel free to contact us.

• Slope protection material

This document includes lessons learned from the field trouble case "Landslide caused by insufficient drainage," outlining the estimated causes and proposed countermeasures. Due to the impact of heavy rainfall, large-scale collapses occurred on the slopes, including geotextile-reinforced earth walls, resulting in significant damage. The document explains the sites and causes of these incidents. Additionally, construction photos of the alternative materials for vertical drainage stone layers and horizontal drainage stone layers, "High-pressure drainage material public drain," are included, which can be useful for consideration during implementation. [Contents] ■ Site Overview ■ Estimated Causes ■ Proposed Countermeasures ■ Alternative Materials for Vertical and Horizontal Drainage Stone Layers (High-pressure drainage material public drain) *For more details, please download the PDF or feel free to contact us.

• Drainage material

We would like to introduce a case study of the slope face disaster recovery method that was implemented. In this site, the collapse of the highway slope occurred due to the effects of surface drainage and infiltration drainage caused by concentrated heavy rainfall. It was necessary to implement countermeasures in a short period of time without significantly impacting highway traffic. For the recovery method of the upper part of the collapsed slope, we proposed the three-dimensional geocell method "GeoWeb retaining wall method," which is used for steep slope protection work and backfill soil retention. [Case Overview] ■ Issues - There is a need to implement countermeasures in a short period of time without significantly impacting highway traffic. ■ Proposal - For the recovery method of the lower part of the collapsed slope, we proposed the fabric formwork method "FabriForm," which is used to prevent washing out of slopes and embankments. *For more details, please download the PDF or feel free to contact us.

• Slope protection material

We would like to introduce a case of "fabric formwork for reforming water channels." In this project, due to large-scale land development, the stream channels in the surrounding area were altered, leading to unexpected locations experiencing water infiltration, raising concerns about expansion. Since there are multiple spring water locations in the stream area, we selected a fabric formwork with drainage type. We designed and constructed it to drain backwater into the channel. 【Case Overview】 ■Challenges - The site is a forest, making it difficult for heavy machinery to enter and shape the slopes, resulting in a site with many irregularities. ■Proposal - A concrete body forming method that injects fluid concrete or mortar into high-strength synthetic fiber fabric formwork using a pump. *For more details, please download the PDF or feel free to contact us.

• Slope protection material

We would like to introduce a case of "Conback Fabricast Void Filling Construction." In this site, the foundation of the quay wall at the coastal fishing port had been eroded over time, raising concerns about the collapse of the existing quay wall. By applying "Conback" followed by "Fabricast," we were able to carry out restoration work for the eroded areas. 【Case Overview】 ■Challenges - The areas subject to erosion were underwater, and it was necessary to implement low-cost restoration measures for the erosion, requiring the execution of void filling work through labor-saving construction methods. ■Results - Due to the difficulty of transporting and installing prefabricated stabilization blocks, we constructed on-site stabilization blocks "Conback" by stacking them. *For more details, please download the PDF or feel free to contact us.

• Various blocks

We would like to introduce a case study on the construction method for steel slope protection called "Geometaframe." To construct a sediment control dam, it was necessary to build a construction access road. We used cement-based solidifying materials to create a steep embankment and were in the process of constructing the access road. However, due to repeated heavy rains, the improved embankment slope collapsed. By installing this product at the slope face during the embankment construction and placing a drainage prevention sheet on the inside of the wall, it became possible to construct the improved embankment while protecting the slope. 【Case Overview】 ■ Challenges - There was a need to construct a sediment control dam for disaster recovery work. ■ Results - We were able to prevent slope erosion due to rainfall, thus protecting the access road from damage. - Reduced the labor required for post-construction work on-site. *For more details, please download the PDF or feel free to contact us.

• Slope protection material

We would like to introduce a case where the energy-saving construction method "River Web" was implemented for the Geo-Web revetment method. In this project, it was required to adopt a revetment protection method with good drainage properties for the protection of the riverbank behind the embankment during the river embankment reinforcement work. By adopting this method, we were able to shorten the construction period originally planned for the fiber-reinforced basket mat method to about one-fourth. 【Case Overview】 ■Challenges - The initially planned method was to use a fiber-reinforced basket mat filled with crushed stone for revetment protection, leading to an increase in construction time due to the large required area for revetment protection. ■Results - The construction period was shortened to about one-fourth. *For more details, please download the PDF or feel free to contact us.

• River construction

We would like to introduce a case study on the application of the labor-saving method "Fabric Formwork Fabric Reform Mat." In this project, it was necessary to protect the embankment of the railway track, which is an important structural element, during the railway line improvement work. By adopting this method, we were able to shorten the construction period for the originally planned block method embankment protection work to about one-sixth of the initial estimate. 【Case Overview】 ■Challenges - The large area requiring embankment protection resulted in an extended construction period. ■Results - We achieved a reduction in the construction period, which pleased our client. *For more details, please download the PDF or feel free to contact us.

• Slope protection material

We would like to introduce a case where "Fabricast void filling construction" was carried out. In this site, the foundation of the riverbank protection in a small river had been eroded over time, raising concerns about the collapse of the existing bank protection. The site was narrow, making it difficult to use large construction machinery, and it was necessary to implement a labor-saving construction method to fill the eroded areas. Therefore, we proposed the "Fabricast" special bag used for filling voids caused by erosion, along with the filling method. Based on the drawings from prior investigations, we manufactured the Fabricast, pumped mortar through pipes, and successfully carried out the challenging task of filling the narrow spaces in the confined site. [Case Overview] ■ Issues - The site was narrow, making it difficult to use large construction machinery, necessitating the implementation of a labor-saving construction method to fill the eroded areas. ■ Results - We were able to successfully carry out the challenging task of filling the narrow spaces in the confined site. *For more details, please download the PDF or feel free to contact us.

• Slope protection material

We would like to introduce a case study of the "Fabriform Disaster Prevention Steps" installation. In recent years, drowning accidents have become a problem in agricultural retention ponds and golf course ponds, and disaster prevention measures have been required at this agricultural retention pond as well. By adopting this method, we were able to install steps made of fabric formwork at any desired position on the Fabriform revetment slope, thereby constructing emergency disaster prevention steps. [Case Overview] ■ Issues - The surface of the fabric formwork became slippery due to moss and other growths. ■ Results - We were able to install steps using fabric formwork and construct emergency disaster prevention steps. *For more details, please download the PDF or feel free to contact us.

• Other earthworks, foundation works, and exterior floors