ASAHI KASEI ADVANCE CORPORATION List of Products and Services

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

We would like to introduce a case where the breathable waterproof sheet method "Public Cover Sheet F Method" was implemented. In this site, due to special circumstances, it was necessary to temporarily store contaminated soil, which required medium to long-term storage. During this storage period, it was necessary to release gases generated from organic matter contained in the soil into the atmosphere while preventing rainwater from permeating the contaminated soil. By using this method, we were able to release gases generated from organic matter in the soil into the atmosphere while preventing rainwater from permeating the contaminated soil, thereby suppressing the outflow of contaminants from within the contaminated soil. 【Case Overview】 ■Challenges - It was necessary to prevent rainwater from permeating the contaminated soil. ■Results - Achieved high water resistance through end film processing. - Suppressed the outflow of contaminants from within the contaminated soil. *For more details, please download the PDF or feel free to contact us.

• Waterproof sheet

We would like to introduce a case study of the railway reinforcement earthwork method "RRR (Three R) Method." In this project, traffic congestion caused by a railway level crossing intersecting with a major road in the city center was a problem. We proposed a method using integrated wall panels with reinforcement materials installed in the ground and bending rigidity. Due to the high rigidity of the wall panels, the restraining effect is strong, allowing us to minimize deformation after completion. 【Case Overview】 ■ Issues - It was required to carry out construction to elevate the railway tracks without interfering with railway operations and while keeping the railway tracks available. ■ Proposal - A method named the rigid wall reinforcement earth retaining wall method. - "Reinforced embankment construction" to create a steep embankment slope. *For more details, please download the PDF or feel free to contact us.

• Reinforcement and repair materials

We would like to introduce a case study on the construction method for "waterproof sheet for agricultural pond disaster recovery." In this case, a pond used for agricultural purposes was protected by a waterproof sheet on its surface. Over time, voids developed in the ground behind the waterproof sheet, causing the sheet to float. We adopted a design that involved installing a permeable crushed stone layer behind the waterproof sheet and discharging the groundwater behind the sheet through a pipe at the bottom of the pond. [Case Overview] ■ Issues - If left unaddressed, there was a possibility that the waterproof sheet could be damaged, compromising its waterproofing performance. ■ Proposal - We proposed using "GeoWeb," a durable frame material, to maintain the crushed stone layer beneath the waterproof sheet. *For more details, please download the PDF or feel free to contact us.

• Waterproof sheet

We would like to introduce a case that adopted the "Conback Method" for the construction of a cast-in-place foundation in the existing bridge pier's lower protective layer in a narrow construction area. To allow construction machinery to enter, it was necessary to implement temporary river enclosures and pump out water. However, carrying out temporary river diversions required significant costs and time, and there was a desire for a protective layer construction method that could be executed without diverting the river. By adopting this method, we were able to eliminate the costs associated with temporary works such as river diversions, leading to savings in construction costs and a reduction in construction period, which pleased the client. 【Case Overview】 ■Challenges - It was necessary to remove the bagged stone protective layer material that had been installed as a protective layer for the existing road bridge pier and to install new protective layer blocks. ■Results - We were able to eliminate temporary construction costs. - We achieved savings in construction costs and a reduction in the construction period. *For more details, please download the PDF or feel free to contact us.

• Various blocks

We would like to introduce a case where we proposed the "silt fence (pollution prevention membrane) + fabric formwork for underwater construction." In this project, the erosion of the riverbed caused by the water flow discharged from the rainwater drainage facility was a concern. We proposed the fabric formwork method, which allows for underwater construction, for riverbed protection work, and it was adopted. Additionally, to address the potential impact on the surrounding environment due to pollution generated when injecting concrete into the fabric formwork underwater, we employed the silt fence method as a countermeasure against pollution diffusion. This contributed to preventing pollution from spreading downstream. 【Case Overview】 ■ Adopted Method: Silt Fence (Pollution Prevention Membrane) - Prevents the diffusion of pollution generated during land reclamation, dredging, riverbank, river, and dam construction, protecting nearby marine resources. ■ Adopted Method: Fabric Formwork "FabriForm" *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 "Conback Method" used for the restoration work of road bridge piers after a disaster. In this site, there is a road bridge located above the existing railway tracks, and during heavy rainfall, the foundation of the road bridge pier near the river was eroded. Considering the impact on the railway tracks, it was necessary to urgently implement disaster recovery work. There was a challenge due to the narrow access for transporting materials and equipment, making it difficult to bring in resources using conventional methods. To address this issue, we proposed the use of the on-site cast box-type stabilization block method, which was adopted. [Case Overview] ■ Adopted Method: On-site cast box-type stabilization block "Conback Method" ■ The Conback Method can be used for disaster recovery work in narrow sites. ■ A wire mesh panel made of zinc-coated iron wire, processed into a U-shape, is assembled on-site into a box shape, and a bag made of synthetic fiber sheet is set inside. After installation at the construction site, concrete is poured into the bag, forming the on-site cast stabilization block method. *For more details, please download the PDF or feel free to contact us.

• Various blocks

We would like to introduce a case where the gas-permeable and waterproof capping sheet method "ADK Sheet" was implemented. In this project, it was necessary to excavate the waste from the existing final disposal site, set up a temporary sorting yard, and properly sort the waste for burial at a new final disposal site. After performing the burial work at the new final disposal site with appropriate waterproofing measures, the final cover was applied to complete the project. When implementing the final cover, we proposed the use of this sheet method to reduce the amount of rainwater infiltration into the waste and to allow gas generated from the waste layer to permeate, which was adopted. 【Case Overview】 ■ Adopted Method: Ventilated and Waterproof Sheet Method "ADK Sheet" ■ The ADK Sheet method can be used to suppress rainwater infiltration into the waste layer and allow gas permeation from the waste layer. ■ The ADK Sheet has a three-layer structure, with the middle layer made of "Tyvek," a polyethylene non-woven fabric that excels in chemical resistance, breathability, and waterproofing, and protective and reinforcing non-woven fabrics bonded to the upper and lower layers. *For more details, please download the PDF or feel free to contact us.

• Waterproof sheet

The "Circular Conback" is a product that can be assembled quickly due to its lightweight and minimal components. The Circular Conback construction method involves setting an inner bag within a cylindrical welded wire mesh and filling it with concrete. Because the components are lightweight, placement and construction are easy. The hardened concrete forms a robust structure. It can also be used for emergency measures during disasters and offers high flexibility in placement. 【Features】 ■ Quickly construct revetments and earth-retaining structures with a diameter of 1m and a height of 1m ■ The circular shape makes it easy to work on curved sections without the need for special molds ■ After the concrete filling hardens, it becomes a strong structure ■ High flexibility in placement allows for various applications *For more details, please download the PDF or feel free to contact us.

• Sandbags

This is a geocell product made of high-density polyethylene sheets with excellent durability, which are pressure-bonded in a staggered pattern using high-frequency technology, resulting in a three-dimensional honeycomb structure when expanded. By filling the cells with materials such as excavated soil or crushed stone, a strong structure is formed. It is effective for slope protection, retaining walls, riverbank protection, and improving subgrade support. **Features** - Lightweight and compact, making it convenient for storage and easy to transport to the site. - Can be deployed on gently sloping surfaces and used as slope protection material after being fixed with anchor pins and covered with soil. - Made from high-density polyethylene, which is durable and flexible. - Filling with locally sourced seed-containing excavated soil allows for greening with native species. - Applicable for slope protection, vegetative retaining walls, river and waterway bank protection, and subgrade and support reinforcement. *For more details, please request materials or view the PDF data available for download.*

• Special Construction Method

This is a geocell product made of high-density polyethylene sheets with excellent durability, which are pressure-bonded in a staggered pattern using high-frequency technology, forming a three-dimensional honeycomb structure when expanded. By filling the cells with materials such as excavated soil or crushed stone, a strong structure is created. It is effective for slope protection, retaining walls, riverbank protection, and improving subgrade support. **Features** - Lightweight and compact, making it convenient for storage and easy to transport to the site. - Can be deployed on gently sloping surfaces and used as slope protection material after being secured with anchor pins and covered with soil. - Made from high-density polyethylene, which offers excellent durability and flexibility. - Filling with locally sourced seed-containing excavated soil allows for greening with native species. - Applicable for slope protection, vegetative retaining walls, river and waterway bank protection, and subgrade and support reinforcement. *For more details, please request materials or view the PDF data available for download.*

• Special Construction Method

This is a geogrid for soil reinforcement and embankment construction, composed of high-strength polyester (PET) fibers as the core material, coated with polypropylene (PP) resin, and structured in a lattice configuration. It has sufficient strength, low elongation, excellent creep characteristics, impact resistance, cold and heat resistance, good friction properties with soil, and excellent workability.

• Retaining wall
• Reinforced earth wall
• Civil Engineering Sheet

(The NETIS Registration Number: KT-230109-A) In 2015, the Ministry of Land, Infrastructure, Transport and Tourism proposed the "Vision for the Reconstruction of a Disaster Prevention Awareness Society." The content explains both soft and hard measures related to disaster prevention against water-related hazards, and among the hard measures, it indicates the development of resilient structures for river levees to withstand overflow as a crisis management-type hard measure. One of the required functions in this context is the "reinforcement of the back slope of river levees." In response to this need, we developed and put into practical use the Solcomat (block mat) method for back slope reinforcement! We confirmed the reinforcement effect during overflow through hydraulic experiments and were able to verify the levee reinforcement effect!

• River construction
• Tensioning and connecting blocks
• Slope protection material

FabriCast refers to a general term for filling bags and specially shaped bags that meet various needs, developed through the unique bag processing technology cultivated by Asahi Kasei Advance over many years. For example, it is widely used in cases where the lower part of a quay is hollowed out due to erosion, as well as in infill work between existing structures and in tunnel closure construction.

• Special Construction Method
• River construction
• Renovation and repair methods

"Conback" is a construction method that involves installing a wire mesh panel with a bag body set in place, and then pouring concrete into it to create blocks. Since the pouring is done after installation, it can be executed even in sites where large machinery like cranes cannot be used. This method can reduce construction time and costs, especially in foundation work for bridge piers. The assembly of the wire mesh panel and the setting of the bag body are also simple, making it highly efficient for construction. 【Main Features】 ■ Not restricted by the construction site ■ Easier and lower cost compared to traditional block methods and stone covering methods ■ Integration of installation and pouring shortens construction time ■ During underwater pouring, the use of additives helps suppress cement runoff *For more details, please refer to the catalog. Feel free to contact us with any inquiries.

• Special Construction Method

The "GeoAce RRR Method" is a construction technique that uses a grid-like reinforcement material called "GeoAce," which is formed by bundling high-strength nylon 66 in a special woven structure, along with rigid wall surfaces to vertically construct the backside of embankments. This allows for the verticalization of the embankment surface, enabling effective land use. The "GeoAce Mattress Method" is a technique that supports the superimposed load through the separation and confinement effects of GeoAce. Compared to conventional replacement methods, it requires less improvement depth and is effective in suppressing uneven settlement. Additionally, it is economical as it reduces the volume of excavation and backfill. 【Features of GeoAce】 ■ High strength ■ Excellent workability ■ Moderate flexibility ■ Superior cost-effectiveness ■ No special machinery tools required For more details, please refer to the catalog or feel free to contact us.

• Bridge Construction

The Geo-Web retaining wall method involves filling a three-dimensional honeycomb structure of geocells with concrete to construct a retaining wall. Due to the simplicity of the work procedures, it allows for a shorter construction period compared to traditional methods. If you consult with us, we can also perform structural calculations.

• Concrete Retaining Wall
• Dam construction
• Retaining wall

"Surprise Mesh" is a product designed to enhance the intrusion prevention function by raising the height of animal damage prevention wire mesh, allowing for better protection of valuable crops from deer, wild boars, and small animals. It can be easily installed without tools onto existing wire mesh intrusion prevention fences, making it simple for elderly individuals to set up. 【Features】 - Can be attached to existing wire mesh fences - The folded-over design at the top of the fence prevents large animals like deer and wild boars from jumping over - Further reduces crop damage - No tools (such as ties or bolts) are required, allowing for easy one-touch installation - Available with barbed wire as well For more details, please contact us.

• others