Drainage method enabling underground comprehensive pipe gallery to penetrate through canal in dry season

Abstract

The invention provides a drainage method enabling an underground comprehensive pipe gallery to penetrate through a canal in a dry season. The drainage method includes the following steps that 1, a drainage channel and a water passing pipe are built at a position parallel to the position where a foundation pit passes through the original canal; 2, a water injection test is performed on the water passing pipe and the drainage channel; 3, after the water passing pipe and the drainage channel pass the water injection test, water in the original canal is drained to the drainage channel and the water passing pipe, and then two ends of the original canal are blocked to achieve safe canal diversion; 4, after canal diversion is completed, foundation pit excavation and subsequent pipe gallery structure construction are performed; 5, foundation pit backfilling is performed; 6, the canal is restored to allow water to flow through the canal; and 7, drainage channel backfilling is performed. According to the drainage method, the water passing pipe is erected on the upper portion of the pipe gallery foundation pit to drain the water in the canal from an upstream position to a downstream position,double-layer profile steel is adopted for supporting the water passing pipe, and it is avoided that the water passing pipe is damaged by excessive stress; hoisting is easy; and the cooperative designof steel sheet pile and steel support erection at the water passing pipe is used for ensuring that water passing pipe bearing platforms do not move, and it is guaranteed that the drainage method is safe and reliable.

Description

technical field [0001] The invention belongs to the research field of underground pipe galleries, and in particular relates to a drainage method for underground comprehensive pipe galleries to pass through rivers and canals in dry seasons. Background technique [0002] With the continuous advancement of the urbanization process, the application of underground comprehensive pipe corridors in urban municipal construction is more and more favored by urban planners and designers. However, the underground comprehensive pipe gallery involves a large area, and often encounters engineering environments such as crossing existing roads, pipelines, and canals. Among them, the excavation of the foundation pit of the canal gallery is a common construction problem in construction. [0003] The existing conventional method to solve this kind of problem is to divide the construction of the comprehensive pipe gallery into two sections. Firstly, after the construction of the first section of...

AI Technical Summary

Problems solved by technology

Practice has proved that on-site plane coordination is required before diversion construction, which will involve land acquisition, demolition, and relocation of towers, building structures, ponds and other factors along the diversion canal, which will greatly occupy the construction period and even cause the project to stop. The construction period is delayed, or when the coordination is not feasible, the original design plan is adjusted, etc.

At the same time, there are problems in the construction of drainage canals such as long length, high cost, low construction efficiency, and poor stability, and most of the drainage canal and cofferdam materials are not suitable for turnover, which is a huge waste

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