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This document explains the construction method using retaining materials widely known as the liner plate method. Various methods are considered mainly for bridge pier repairs, and it is widely examined as a suitable foundation and retaining method in areas such as upstream rivers where heavy machinery cannot access. [Document Introduction *Excerpt] ■ Methods suitable for the removal of accumulated sediment around bridge piers ■ Methods that have achieved the reuse of liner plates ■ Comparison materials for various liner plate methods *Overview, features, water-stopping methods, advantages, disadvantages, etc. are introduced. Our company handles methods suitable for temporary closures (using liner plates) for bridge piers, sluices, etc. *For more details, please download the PDF or feel free to contact us.

• Special Construction Method

We offer three optimal construction methods for temporary closures (using liner plates) for bridge piers, sluice gates, and more. 【Temporary Closure Waterproof Sheet Method】 In existing methods, liner plates are discarded after one use, but we developed this method to allow for reuse based on requests from clients. "Waterproof sheet + Floating platform" 【Temporary Closure FPS Method】 In existing methods (using water-stopping packing), if the shape of bridge piers and the closure frame become large, assembly work on bracket-type scaffolding may not be feasible. We developed this method to accommodate all conditions by using lightweight floating barges. "Water-stopping packing + Floating platform" 【Pump Dredging Method (Obstacle Avoidance Type)】 By installing a long nozzle at the bottom of the dredging frame, which houses underwater sand pumps, air pumps, and high-pressure pumps, we made it possible to dredge only sediment from sediment layers mixed with obstacles such as driftwood and boulders. *For more details, please download the PDF or feel free to contact us.

• Special Construction Method

Our company offers a temporary closure method using a "floating platform/waterproof sheet with waterproof fasteners." The "floating platform" is designed with a sliding function to allow the installation of a platform necessary for assembly work around bridge piers in minimal space. Additionally, by adopting a waterproof sheet, we have eliminated the need for water-stopping packing that was previously used during the assembly of temporary closure materials, enabling water-stopping through the waterproof sheet. 【Features】 ■ No welding or other fixation is required when attaching the temporary closure frame to the door body. ■ The load acting on the door body can be minimized. ■ The edges of the waterproof sheet are installed outside the temporary closure frame. ■ The waterproof sheet and temporary closure frame are independent, ensuring that any movement of the temporary closure frame does not affect water-stopping performance. *For more details, please download the PDF or feel free to contact us.

• Special Construction Method

The temporary deadline FPS method has many advantages compared to conventional methods, including construction costs and timelines. Lifting fixtures and floating work platforms are installed, and the liner plates are assembled in the air before being lowered and installed underwater. 【Advantages】 ■ Manual construction is possible ■ Large-scale temporary structures are not required ■ Simple construction and processes, etc. 【Evaluation】 ■ Improved safety due to reduced underwater construction ■ Cost reduction For more details, please download the materials or contact us directly.

• Special Construction Method

The temporary deadline FPS method is a construction technique that minimizes underwater work performed by divers. It involves installing lifting fixtures and a floating work platform, assembling liner plates above water, and then lowering and installing them underwater. 【Features】 ■ Minimizes underwater construction. ■ Manual construction is possible. ■ Large-scale temporary structures are not required. ■ Construction and processes are reliable. For more details, please download the materials or contact us.

• Civil Engineering Method

The sediment excavation method is suitable for the removal of accumulated sediment around bridge piers. 【Features】 ■ Can be implemented in confined spaces with a headroom restriction of 2.0m. ■ Capable of suctioning mud, sand, gravel, and cobblestones. (Grain size up to 15mm, transport distance of approximately 200m possible) ■ Structure designed to avoid obstacles such as driftwood and boulders. ■ Minimizes turbid water as much as possible. ■ Easy management of excavation depth. ■ Size of the dredging equipment can be adjusted according to site conditions. For more details, please download the materials or contact us.

• Civil Engineering Method

The "SD (Super Deck)" is a modular floating platform that can be transported by land and is widely used for construction and survey work in enclosed water areas such as dams, rivers, lakes, and marshes. It can be transported on a low-floor truck with a capacity of 15 tons, allowing for the loading of 4 units (SD-N) or 6 units (SD-H). (When loading 4 units, the vehicle height will be 4.0m, so prior confirmation of the passage route is required.) Additionally, the connection of the floats is integrated using a wedge lock system. It has sufficient strength to accommodate cranes, pile drivers, and backhoes. (The joints can be easily made from the deck while floating on the water.) 【Features】 ■ The connection of the floats is integrated using a wedge lock system. ■ It has sufficient strength to accommodate cranes, pile drivers, and backhoes. ■ The deck is flat after assembly, with a gap of 40mm at the connection points. ■ No special protection is required for loading materials. *For more details, please refer to the PDF document or feel free to contact us.

• Work boats, research vessels, underwater work machines