Permanent circular working well with preset pipe-jacking door opening in water-rich formation and construction method of permanent circular working well

Abstract

The invention provides a permanent circular working well with a preset pipe-jacking door opening in a water-rich formation and a construction method of the permanent circular working well. The construction method specifically includes the following steps that (1) functional requirements of the circular working well are designed; (2) open caisson construction of a maintenance structure of the circular working well is conducted; (3) temporary border protection construction is conducted; (4) downhole earthwork is excavated; (5) the bottom of the circular working well is sealed; (6)a crawling ladder for entering the circular working well is mounted; (7) joint leakage is treated; (8) a wellhead water stopping pressing plate is mounted; (9) a sandwich concrete board wall at the top of the presetdoor opening is lifted; (10) jacking construction of pipe-jacking is conducted; (11) communication of downhole pipelines, mounting of valves and related work are implemented, checked and accepted; and (12) the temporary border protection is removed, the top of the circular working well is covered with a plate, a inspection well is mounted, and waterproof construction is conducted. According to the permanent circular working well and the construction method, a constructed structural system has many advantages of being clear in function, safe and quick, skillful in design and the like, the potential safety hazard of sudden water gushing and sand gushing in the process of the penetration of pipe-jacking through the well wall is particularly overcome, and a new method is provided for non-excavation construction of underground pipelines such as water conservancy, municipal administration, heating power and communication.

Description

technical field [0001] The invention belongs to the field of non-excavation construction and restoration of infrastructure facilities such as water conservancy, municipal administration, heat power, and communication, and specifically relates to providing a water-rich stratum pre-fabrication method for the non-excavation construction and restoration of underground pipelines such as water conservancy, municipal administration, heat power, and communication. A permanent circular working well with a pipe jacking opening and its construction method. Background technique [0002] The process of urbanization is accelerating, not only to build a large number of underground infrastructure facilities, but also to face the problem of rectification and upgrading of a large number of old underground pipelines, which makes the underground pipeline network of many urban roads very complicated, and road surface collapse and safety accidents caused by damage to underground pipelines are freq...

AI Technical Summary

Problems solved by technology

In addition, the most critical link is before the construction of pipe jacking in water-rich strata. Opening the door opening is a very dangerous process.

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