Diaphragm wall construction method across deep buried large municipal pipelines

Abstract

The invention discloses a construction method for a continuous wall across a large deeply-buried municipal pipeline. The method is characterized by comprising the following steps of first, closing a gate before and a gate behind the section, with the continuous wall to be built, of the municipal pipeline, and pumping out all the water in the section of the municipal pipeline or making the water inthe municipal pipeline stay still; second, drilling a hole to the top of the municipal pipeline, and making a steel pipe casing overlap with the municipal pipeline; third, using a percussion drill tobreak through the part, corresponding to a steel pipe casing assembly, of the municipal pipeline; fourth, sealing the side, away from the continuous wall to be built, of the through hole in the municipal pipeline with bagged cement; fifth, filling up the section, with the two ends sealed, of the municipal pipeline by adopting a water jetting method, and using water doped with 15% of cement in thewater jetting process to form cemented soil; sixth, filling up the steel casing pipe assembly with sandy soil, and then pulling the steel casing pipe assembly out; and seventh, carrying out groovingon the continuous wall according to normal mud protection. According to the construction method for a continuous wall across the large deeply-buried municipal pipeline, the steel casing pipe is adopted to compact sandy soil in a subsection manner, it is easier for workers to carrying out filling and compaction, and then the working efficiency is improved.

Description

technical field [0001] The invention relates to the field of building construction, in particular to a construction method for a diaphragm wall spanning a deep-buried large municipal pipeline. Background technique [0002] At present, with the increasing number of urban rail transit and large-scale underground space development projects in recent years, and these projects are mostly located in the city center, conflicts between the enclosure structure and the existing pipelines often occur during the construction process, and some shallow buried pipelines have been relocated. It is more convenient, but it is often difficult to relocate some deep-buried large pipelines. If the relocation is not carried out in advance, during the subsequent diaphragm wall construction, a large amount of mud used for the diaphragm wall will be lost from the pipeline, and the groove cannot be completed. The above problems have not been solved. In the existing diaphragm wall construction technolo...

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Problems solved by technology

[0004] The purpose of the present invention is to provide a diaphragm wall construction method across deep-buried large municipal pipelines, which solves the control of sand and soil extrusion force after landfill in the existing diaphragm wall construction method across deep-buried large municipal pipelines time-consuming and labor-intensive defects that rely on manual filling and compaction

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