City combination pipeline corridor branch construction method in limited space environment

Abstract

The invention discloses a city combination pipeline corridor branch construction method in a limited space environment. The method includes the steps: reasonably dividing a pipeline corridor branch into a horizontal construction unit and a vertical construction unit, and identifying the branch excavation range on the field by the aid of red spray paint and wood piles; constructing a horizontal unit and a vertical unit by a reverse hanging well wall construction method; recovering a road or a landscape at the top of a horizontal structure unit, transporting earthwork of the horizontal unit to the vertical unit through a soil discharging channel reserved in a middle partition to transport the soil to the outside; backfilling the horizontal unit, constructing an upper structure of the vertical unit, taking each 3m as a construction subsection, directly performing waterproof construction on the wall of a vertical well, and implementing a bracing support system in the vertical well. According to the method, city pass can be immediately recovered, landscape requirements can be immediately met, adverse effect of large machinery on environments is avoided, an underground pipeline is conveniently protected, the horizontal construction unit and the vertical construction unit are skillfully integrated and excavated, structure construction is implemented, a construction period is shortened, and construction cost and risks are reduced.

Description

technical field [0001] The invention relates to the technical field of building construction, in particular to a branch construction method of an urban comprehensive utility gallery in a space-constrained environment. Background technique [0002] Due to the functional requirements of the comprehensive pipe gallery, there are dense outlet branches in the comprehensive pipe gallery. The main line of the comprehensive pipe gallery can be constructed under urban roads by using underground excavation, shield method, etc., and the access users are usually existing buildings (structures) that have been put into use, resulting in the access branch of the access user being restricted by the site. This problem is particularly prominent in urban areas. If the open-cut foundation pit method is adopted, there are the following disadvantages: (1) The original municipal pipelines are dense, and the construction enclosure and row of piles will conflict with the complex underground pipelin...

AI Technical Summary

Problems solved by technology

If the open-cut foundation pit method is adopted, there are the following disadvantages: (1) The original municipal pipelines are dense, and the construction enclosure and row of piles will conflict with the complex underground pipelines. The original pipelines need to be cut or protected, which will cause large (2) The demand for construction site area is large, and the impact on urban traffic is obvious; (3) The impact on the environment is large, such as the silt generated by pile foundation construction, the noise of large-scale machinery construction, etc.

Using the method of underground excavation has the following disadvantages: (1) The amount of underground excavation is small, and the cost is significantly increased; (2) The construction period is long, and the impact of construction on the environment is unfavorable

(3) There is a large slope in the outlet structure, and the construction risk is high

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