ESP List of Products and Services

We would like to introduce our "River and Coastal Erosion Repair Work." A composite pipe, which integrates a pressure pipe and a water suction pipe, is inserted into the cavity of the erosion structure to discharge stagnant water while preventing damage expansion through concrete pressure placement. There is no displacement of the river width, and it does not disrupt the landscape or form. Additionally, construction machinery and manual labor are not required, allowing for a reduction in workforce. 【Features】 ■ No displacement of the river width ■ Does not disrupt the landscape or form ■ No water replacement needed for low water volume affected areas ■ Construction by extending the pressure placement hose from a distant mixing vehicle ■ Short-term construction is possible *For more details, please refer to the PDF document or feel free to contact us.

• Renovation and repair methods

We would like to introduce our "Small-scale Erosion Repair Work" that we handle. This short-term construction reinforcement method improves the quality of poured concrete and prevents the expansion of damage by absorbing and discharging flowing and stagnant water within the cavities of erosion structures caused by numerous floods, as well as by pumping and filling. It can also be applied to mountain stream stop work. It is effective in increasing deterrence against the expansion of small-scale erosion areas. Please feel free to contact us if you have any inquiries. 【Features】 ■ No reduction in river width, etc. ■ No need for temporary roads or leased land ■ Construction machinery and manual labor are not required, allowing for a reduction in workforce ■ Environmentally and aesthetically considerate construction is possible ■ Total cost reduction is achievable *For more details, please refer to the PDF materials or feel free to contact us.

• Renovation and repair methods

The "Tosui CON Filling Method," suitable for measures to extend the lifespan of structures, is a construction method aimed at preserving and maintaining existing structures while maintaining landscape formation. In response to the aging of stone masonry and stone walls in riverbanks, waterways, and residential areas, a plant is set up on-site to inject and fill with Tosui CON (aggregate, cement, water, B.CON + S), which excels in permeability, strength, durability, and workability from joints and cracks. This helps maintain the stability of the stone masonry and suppresses piping phenomena by draining water from the joints. 【Construction Example】 Purpose: Water measures for existing structures in landscape areas Preservation and maintenance of openings, gaps, looseness, bulging, suction, subsidence, voids, etc. Proposal: Tosui CON Filling Method Features: - Does not compromise the landscape - Prevents backfill erosion - No traffic restrictions required - No need for demolition of existing structures - No noise or vibration - Suitable for water measures *For more details, please refer to the PDF download or contact us.

• Renovation and repair methods

The "Tosui CON filling method" is a construction technique aimed at preserving and maintaining existing structures while maintaining landscape formation. In response to the deterioration of stone masonry and stone walls in riverbanks, waterways, and residential areas, a plant is set up on-site to inject and fill with Tosui CON (aggregate, cement, water, B.CON + S), which excels in permeability, strength, durability, and workability from joints and cracks. This helps maintain the stability of the stone masonry and suppresses piping phenomena by draining water from the joints. 【Features】 ■ Has strength comparable to mortar while ensuring permeability. ■ Suitable for water countermeasures such as piping phenomena. ■ Can be applied in narrow areas as well as extensive regions. ■ Shortens construction time as curing period is unnecessary. ■ No demolition of existing structures, resulting in no noise or vibration. *For more details, please refer to the PDF download or contact us.

• Renovation and repair methods

Introducing water management for existing structures in scenic areas using the "Tosui CON filling method." This method does not require the demolition of existing structures. It suppresses the outflow of backfill soil and does not produce noise or vibration. It is suitable for maintenance and preservation of openings, voids, looseness, sagging, suction settlement, and gaps. 【Features】 ■ Does not compromise the landscape ■ Suppresses outflow of backfill soil ■ No need for traffic restrictions ■ No demolition of existing structures required ■ No noise or vibration ■ Suitable for water management *For more details, please refer to the PDF document or feel free to contact us.

• Other construction services

Introducing the conservation of natural environments for designated natural monuments using the "Tosui CON filling method." This method does not require the demolition of existing structures. Additionally, it does not compromise the landscape and produces no noise or vibration. It is particularly suitable for the conservation of camphor trees. 【Features】 ■ Does not compromise the landscape ■ Prevents backfill erosion ■ No traffic restrictions required ■ No demolition of existing structures needed ■ No noise or vibration *For more details, please refer to the PDF document or feel free to contact us.

• Other construction services

We would like to introduce the coastal protection and breakwater function preservation maintenance using the "Tosui CON filling method." This method does not cause turbidity or water quality pollution during construction. Furthermore, it allows for the suppression of wave pressure using permeable concrete. It enables short construction periods and low costs. 【Features】 ■ Prevention of stone outflow from within the masonry ■ No turbidity or water quality pollution during construction ■ Suppression of wave pressure using permeable concrete ■ Work can be adapted to tidal conditions ■ Short construction periods and low costs *For more details, please refer to the PDF materials or feel free to contact us.

• River construction
• Other construction services

The "Tosui BW Filling Method" is a construction technique for small-scale maintenance of fishing ports, coastal revetments, breakwaters, and similar structures. It can address damage such as loosening, detachment, suction, bulging, sinking, and voids. Due to its easy mobility with a 4-ton truck-mounted plant, it can respond to surrounding damaged areas (with combined construction quantities). Additionally, because the filling is done manually, there are no restrictions on construction. 【Features】 - Filling with permeable concrete reduces wave forces on existing structures. - Capable of addressing surrounding damaged areas. - Does not require specialists for underwater curing, etc. - Allows for construction in a short period and at low cost. - No construction restrictions due to manual filling (flexible response to narrow spaces, etc.). *For more details, please refer to the PDF document or feel free to contact us.

• River construction
• Other construction services

The "Tosui CON filling method" is a construction technique aimed at preserving and maintaining existing structures while maintaining landscape formation. In response to the deterioration of stone masonry and stone walls in riverbanks, waterways, and residential areas, a plant is set up on-site to inject and fill with Tosui CON (aggregate, cement, water, B.CON + S), which excels in permeability, strength, durability, and workability, thereby stabilizing the stone masonry and preventing piping phenomena by draining water from the joints. It is also possible to achieve waterproofing by changing the materials used. The catalog includes 12 case studies of construction methods for large-scale river improvement projects, riverbank repair work, river disaster recovery projects, and fishing port repair work. 【Features】 ■ Capable of discharging backwater ■ Does not encroach on river cross-sections ■ Easy construction in narrow areas ■ Compact plant yard ■ Extended pumping hoses allow for extensive construction *For more details, please refer to the catalog or feel free to contact us.

• Civil Engineering Method
• River construction
• Other construction services

The "Construction Method Comparison Table" presents a comparison of disaster mitigation construction methods, including "Tosui CON Filling Method" and "Conventional Method (Mortar Injection)," as well as semi-permanent construction methods like "Concrete Block Masonry" and "Reinforced Concrete Method (Gravity Retaining Wall)." The document clearly outlines the overview of each method, along with their workability, durability, and features in a table format for easy understanding. [Contents] ■ Disaster Mitigation Construction - Tosui CON Filling Method - Conventional Method (Mortar Injection) ■ Semi-Permanent Construction - Concrete Block Masonry - Reinforced Concrete Method (Gravity Retaining Wall) *For more details, please refer to the PDF document or feel free to contact us.

• River construction
• Renovation and repair methods
• Civil Engineering Method

The "Tosui CON filling method" is a construction technique aimed at preserving and maintaining existing structures while maintaining landscape formation. We have received support for "short construction periods! Low budgets! Construction without heavy machinery, regardless of location!" and requests for construction have rapidly increased, primarily from municipal offices. For the deterioration of stone masonry and stone walls in riverbanks, waterways, and residential areas, a plant is set up on a 4-ton truck brought to the site, and Tosui CON (aggregate, cement, water, B.CON + S), which excels in permeability, strength, durability, and workability, is injected and filled through joints and cracks. This helps maintain the stability of the stone masonry and suppresses piping phenomena by draining water from the joints. Waterproofing is also possible by changing the materials used. 【Features】 ■ Discharge of backwater is possible ■ Does not encroach on river cross-sections ■ Easy construction in narrow areas ■ Compact plant yard ■ Extended pumping hoses allow for extensive construction NETIS Registration Number: CG-140010 Hiroshima Prefecture Infrastructure Deterioration Countermeasures (Longevity Technology) Registration No. 26-007-2 *For more details, please refer to the catalog or feel free to contact us. 【NEW】We have created a photo collection of recent construction examples. Please download and take a look.

• River construction
• Other construction services
• stone

This test follows the constant water level method established by the Geotechnical Engineering Society. However, to verify and confirm whether the seepage flow follows Darcy's law, we will change the hydraulic gradient, measure the flow rate, and graph the results. To enhance the reliability of the permeability coefficient, we will perform a linear regression analysis based on the relationship between the hydraulic gradient and flow rate that is believed to be within the laminar flow region (i≦0.1, including the theoretical values of hydraulic gradient i=0 and flow rate v=0). 【Overview】 ■ Sample Type: Permeable Concrete ■ Sample Number: No.1 ■ Type of Cement Used: NP ■ Name of Admixture Used: Beacon + S *For more details, please refer to the PDF document or feel free to contact us.

• River construction
• Renovation and repair methods
• Concrete construction

Introducing the "Construction Method" of ESP Corporation, which conducts repairs and reinforcements of stone walls and embankments. For the aging of stone masonry and stone walls in embankments, waterways, and residential areas, we install a plant on-site. We inject and fill with Tōsui CON, which excels in permeability, strength, durability, and workability, from joints and cracks to maintain the stability of the stone masonry. By draining from the joints, it is possible to suppress the piping phenomenon. We aim to preserve and maintain stability while maintaining the landscape. *For more details, please refer to the catalog or feel free to contact us.

• River construction
• Renovation and repair methods
• Civil Engineering Method

The "Tosui CON Filling Method" is a maintenance and preservation measure aimed at extending the lifespan of structures. By pumping permeable concrete, which excels in permeability and workability, into the voids of existing structures through surface openings and injection holes, the filling material functions as a filter material. This method can suppress piping phenomena caused by infiltrating water from the back, thereby enhancing the stability of existing structures. 【Features】 - Existing structures remain as they are, maintaining aesthetics, reducing costs, and preserving integrity. - Has strength comparable to mortar while ensuring permeability. - Compressive strength: 13N–15N/mm² (at 28 days or older). - Does not contain water quality pollutants. - No noise or vibration as there is no demolition of existing structures. *For more details, please refer to the PDF document or feel free to contact us.

• River construction
• Renovation and repair methods
• Civil Engineering Method

The "Tosuicon Filling Method" is a construction technique aimed at preserving and maintaining existing structures while maintaining landscape formation. In response to the deterioration of stone masonry and stone walls in riverbanks, waterways, and residential areas, a plant is set up on-site to inject and fill with Tosuicon (aggregate, cement, water, B.CON + S), which excels in permeability, strength, durability, and workability from joints and cracks, thereby maintaining the stability of the stone masonry and allowing drainage from the joints to suppress piping phenomena. Waterproofing is also possible by changing the materials used. 【Features】 ■ Discharge of backwater is possible ■ Does not encroach on river cross-sections ■ Easy construction in narrow areas ■ Compact plant yard ■ Extension of the pumping hose allows for extensive construction *For more details, please refer to the catalog or feel free to contact us.

• River construction
• Other construction services
• stone