鉄建建設 List of Products and Services

The HEP&JES (High Speed Element Pull & Jointed Element Structure) construction method, developed in collaboration with JR East, is a rational construction technique for cross-sectional structures that combines the non-excavation HEP (High Speed Element Pull) method for pulling and laying elements with the JES (Jointed Element Structure) method, which uses steel elements as the main structural components. This method has been adopted in projects for grade separations under railways and highways, and as of May 2024, it has accumulated over 160 orders. We propose the HEP&JES method as a safe, short-term, and low-cost solution for eliminating level crossings and improving intersections aimed at urban regeneration. **Features** - Since the inserted elements are used directly as the main structural components, insertion work is completed in one go, minimizing the impact on tracks and road surfaces. - Various shapes of structures can be constructed without being limited by structural length. - The method allows for precise construction as elements are pulled from the target point on the arrival side. - Since the pulling reaction force is taken by the retaining wall on the arrival side, there is no need for reaction force equipment on the starting side. *For more details, please refer to the PDF materials or feel free to contact us.*

• Concrete construction

The COMPASS Method TYPE 3 (Ground Cutting and Box Tunneling) is a non-excavation method used for the construction of small cross-sectional structures such as rivers and sidewalks that cross under roads and railways. To insert the roof of the cutting head into the cutting groove (the space created by the ground cutting wire scraping the ground) in front of the cutting head body, it is possible to prevent excessive soil intake and the uplift of obstacles caused by the cutting head, thereby minimizing the impact on the ground above. 【Features】 ■ Safety ■ Workability ■ Cost-effectiveness *For more details, please refer to the PDF materials or feel free to contact us.

• Concrete construction

The Eco Recharge® method (circular groundwater control method) is a technique aimed at lowering groundwater levels by pumping groundwater and injecting it back into the ground using the latest technology. By eliminating excess water, it significantly reduces construction costs. Groundwater pumped from deep wells and other pumping wells is first sent to a sand separator. Here, impurities such as sand contained in the groundwater are removed, and then it is sent to a receiving tank. By controlling the injection pump to maintain a constant water level in the receiving tank, groundwater is pumped into the ground from the injection well without excess or deficiency. 【Features】 ■ Economic efficiency ■ Environmental conservation ■ Safety *For more details, please refer to the PDF document or feel free to contact us.

• Concrete construction

The small-diameter pumping method is a technique used to lower groundwater levels by pumping in areas with high groundwater levels. This method generates negative pressure by sending a jet fluid (water or air) to an ejector installed at the well's tip, allowing for groundwater extraction. Since there is no need for a submersible pump inside the well, the drilling diameter can be smaller and more economical compared to traditional deep well methods. Additionally, it can handle higher lift compared to well point methods. 【Features】 ■ Excellent applicability: It can pump groundwater at depths where well point methods are ineffective and in soils with lower permeability coefficients than those used in deep well methods. ■ Cost-effectiveness: By not installing a submersible pump inside the well, the drilling diameter can be reduced compared to deep well methods. ■ Usability: Since the equipment is located above ground, maintenance is easy. *For more details, please refer to the PDF materials or feel free to contact us.

• Concrete construction

The Tough Sheet Method involves attaching a tough sheet to the existing lining surface of a tunnel to prevent the detachment of concrete fragments and other materials. The tough sheet is soft and easy to handle before curing, and it cures after being exposed to ultraviolet light for about 20 minutes once applied to the construction area. Therefore, compared to conventional repair methods, it allows for extensive work to be completed in a short time, making it an ideal method for construction in locations with time constraints, such as railway and road tunnels. 【Features】 ■ Excellent detachment prevention effect ■ Fewer construction steps ■ Quick sheet curing ■ Transparent material ■ Flexibly conforms to the substrate *For more details, please refer to the PDF document or feel free to contact us.

• Concrete construction

The high-strength thin-shell reinforcement method uses a composite material that combines short-fiber reinforced mortar, which excels in compressive strength and compressive ductility, with continuous fiber mesh as tensile reinforcement, allowing for a thin reinforcement layer that can accommodate areas with limited internal cross-section. *This method was developed in collaboration with the Public Works Research Institute and Kuraray Co., Ltd.* 【Features】 ■ Cost reduction ■ Reduced load on general traffic ■ Easy construction method ■ High design flexibility *For more details, please refer to the PDF document or feel free to contact us.*

• Concrete construction

The "SC Plate Method (Type F)" is a construction method primarily used for preventing spalling at the joints of tunnel linings where there is water leakage. By simply attaching a resin board, which is similar to insulation material, with anchors, it is possible to implement measures against spalling and prevent icicles in cold regions. 【Features】 - The board is lightweight, making installation easy. - It has moderate flexibility, allowing good conformity to the tunnel lining surface. - It can be easily cut, allowing for notching on-site. - The board is alkali-resistant (pH 14, 30-day immersion), eliminating concerns about deterioration due to efflorescence. - The addition of non-combustible paper improves flame resistance and self-extinguishing properties. *For more details, please refer to the PDF document or feel free to contact us.*

• Concrete construction