A prefabricated recyclable circular working well with integrated rear leaning wall and its construction method

Abstract

The invention relates to a design and construction method for the integration of an assembled recyclable circular pipe jacking well and a back-to-wall, including: (1) functional requirement design of a circular pipe jacking well; (2) construction of support piles (3) Installation of prefabricated crown beams; (4) Border protection construction; (5) Alternate construction of earthwork excavation, soil retaining panels, and circular inner support beams; (6) Installation of ladders for entering circular pipe jacking wells; ( 7) Sealing of the circular pipe jacking work well; (8) Back-to-wall construction can complete the integrated construction of the assembled recyclable circular pipe-jacking work well and the back wall; (9) After the operation in the well is completed, the backfilling process In the reverse order, the working well components such as the back wall, soil retaining panel, annular inner support beam, prefabricated crown beam and support pile are gradually recovered. The structural system constructed by the invention has many advantages such as clear function, safety and quickness, recyclable assembly type, reusability, etc., and provides a new method for trenchless construction of underground pipelines such as water conservancy, municipal administration, heat 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 back-to-wall integrated system for the non-excavation construction and restoration of underground pipelines such as water conservancy, municipal administration, heat power, and communication. A prefabricated recyclable circular working well 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 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 underground pipelines . With traffic requirem...

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

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