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  1. Home
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  3. Construction, work and methods
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  5. Special Construction Method
  6. Shortening the construction period and reducing costs for repair and reinforcement work! Optional depth anchoring type temporary closure method.

Shortening the construction period and reducing costs for repair and reinforcement work! Optional depth anchoring type temporary closure method.

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last updated:May 28, 2026

第一建設工業 本社・新潟支店
第一建設工業 本社・新潟支店
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Small scale, no large machinery required! An energy-saving construction method 'D-flip' that allows for the creation of workspaces at any desired height using only manual labor.

The "D-flip method" is a temporary cutoff method for repairing and reinforcing bridge piers located underwater, designed for arbitrary depth anchoring. Developed by our company, it aims to reduce the labor and scale of temporary cutoff equipment compared to conventional methods using steel sheet piles, thereby shortening the construction period and lowering costs. By fixing the temporary cutoff equipment at any height (depth) around the existing bridge pier, a dry space can be created without being affected by riverbed conditions (such as soil hardness and protective works) like in steel sheet pile methods, and large heavy machinery operations are also unnecessary. 【Features】 - Miniaturization of temporary cutoff equipment and labor-saving construction - Cost reduction and shortened construction period due to the miniaturization of temporary cutoff - No need for penetration of temporary cutoff materials into riverbed or ground - Not influenced by riverbed conditions (such as soil conditions and protective works) - Manual construction is possible due to the division of components *For more details, please refer to the PDF document or feel free to contact us.

    Special Construction Method
D-flip(ディーフリップ)工法.jpg

Shortening the construction period and reducing costs for repair and reinforcement work! Optional depth anchoring type temporary closure method.

D-flip(ディーフリップ)工法.jpg
D-flip(ディーフリップ)工法.jpg
  • Related Link - https://www.daiichi-kensetsu.co.jp/solution/d-flip…

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basic information

【Construction Procedure】 ■STEP1: Installation of bracket-type scaffolding ■STEP2: Assembly of temporary closure equipment ■STEP3: Installation of hanging equipment ■STEP4: Removal of bracket-type scaffolding ■STEP5: Sinking (lowering) of temporary closure equipment ■STEP6: Fixing of temporary closure equipment ■STEP7: Pouring of water-stopping concrete ■STEP8: Water replacement work *For more details, please refer to the PDF document or feel free to contact us.

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【Purpose】 ■ Bridge pier repair and reinforcement *For more details, please refer to the PDF document or feel free to contact us.

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Arbitrary Depth Fixed-Type Temporary Closure Method "D-flip Method"

Arbitrary Depth Fixed-Type Temporary Closure Method "D-flip Method"

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第一建設工業

第一建設工業 本社・新潟支店

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Our company operates as a comprehensive construction business based on railway construction, engaging in track inspection and maintenance, new installations, and the construction and repair of railway structures and related facilities. We also leverage the technical skills and proposal capabilities developed in this field to contribute broadly to civil engineering and architecture, taking on the creation of social infrastructure. We will respond accurately and flexibly to various situations, contributing to society through sustainable and rich urban development in both environmental and social aspects.

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