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Multi-stage pipe, multi-stage drainage pipe, multi-stage drainage pipe construction method, and multi-stage drainage pipe drainage structure
Multi-stage pipe, multi-stage drainage pipe, multi-stage drainage pipe construction method, and multi-stage drainage pipe drainage structure
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机译：多级排水管，多级排水管，多级排水管的施工方法，多级排水管排水结构
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摘要
PROBLEM TO BE SOLVED: To provide a construction method of a multi-stage pipe, a multi-stage drainage pipe, a multi-stage drainage pipe, and a drainage structure of the multi-stage drainage pipe capable of counteracting a compressive force. SOLUTION: A plurality of pipe bodies having different pipe diameters (outer pipe 2, inner pipe 3, intermediate 13) are provided, and another pipe body is placed in the outer pipe 2 having the largest pipe diameter among these plurality of pipe bodies. In a multi-stage pipe (multi-stage drainage pipe 1) that can be stored, the pipes oppose the compressive force acting in the direction of contracting and compressing each other when stretched between the plurality of pipes. Locking mechanisms 6 to 11 for locking the bodies are provided. [Selection diagram] Fig. 3
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