Fabricated recoverable circular working well of preset pipe-jacking door opening and rotary back leaning wall and construction method of fabricated recoverable circular working well

Abstract

The invention relates to a fabricated recoverable circular working well of a preset pipe-jacking door opening and a rotary back leaning wall and a construction method of the fabricated recoverable circular working well. The construction method includes the following steps that (1) functional requirements of the circular working well are designed; (2) support pile construction is conducted; (3) a prefabricated crown beam is mounted; (4) border protection is conducted; (5) alternate construction ofearth excavation, a soil retaining panel and an annular inner support beam is conducted, and the door opening is synchronously reserved; (6) a crawling ladder for entering the circular working well is mounted; (7) the bottom of the circular working well is sealed, and a rotary track, a pull ring and a back leaning wall anchoring part are pre-embedded; (8) rotary back leaning wall construction is conducted; (9) after downhole operation is completed, in the process of backfilling, the members such as the back leaning wall, the soil retaining panel, the annular inner support beam, the crown beam and the support pile are recovered in an reverse sequence step by step. According to the fabricatedrecoverable circular working well and the construction method, a constructed structure system has many advantages of being clear in function, safe and rapid, recyclable in a fabricated mode, reusableand the like, 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 preset pipe jacking for the non-excavation construction and restoration of underground pipelines such as water conservancy, municipal administration, heat power, and communication. A door opening, a prefabricated recyclable circular working well with a rotary back against the wall and a construction method thereof. 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 a large number of old underground pipelines over the service period, which makes the underground pipeline network of many urban roads very complicated, and road surface collapse and safety accidents frequently occur due to damage to ...

AI Technical Summary

Problems solved by technology

At present, regarding the design and construction of working wells, receiving wells and relay rooms, caisson well technology or inverted well technology is still the main choice. Although it is safe and reliable, it has high cost, long construction period, difficulty in sinking, inclination and improper operation. Instability accidents, etc., especially in working wells, one or more sides may need to bear the jacking reaction force during the pipe jacking construction process, and the establishment of the back wall is also a very complicated process

Images