Diaphragm wall construction method across deep buried large municipal pipelines

Abstract

The invention relates to a construction method for a continuous wall of a crossing deep-buried large-sized municipal pipeline. The invention aims at providing a construction method for a continuous wall of a crossing deep-buried large-sized municipal pipeline. The technical scheme is as follows: a, closing a front gate and a rear gate penetrating a to-be-constructed continuous wall section in the municipal pipeline, and completely discharging the water in the to-be-constructed continuous wall or ensuring that the water inside the pipeline stays at a non-flowing state; b, adopting a steel protection tube to protect the wall, and perforating to the top of the municipal pipeline; c, breaking through the municipal pipeline, and forming a through hole communicating the steel protection tube and the municipal pipeline; d, adopting bagged cement to seal the side, away from the through hole inside the municipal pipeline, of the to-be-constructed continuous wall; e, adopting a flushing method to compact the internal space of the municipal pipeline with two sealed ends; f, utilizing sand to compact the steel protection tube, and then unplugging the steel protection tube; g, grooving the continuous wall according to a conventional sludge protection wall, and adopting an impacting driller to break through the municipal pipeline on the part of the continuous wall and the cement inside the municipal pipeline to the upper part of the municipal pipeline; and h, adopting a conventional construction method of the continuous wall to complete the subsequent construction.

Description

technical field [0001] The invention relates to a construction method for a diaphragm wall straddling a deep-buried large-scale municipal pipeline. Applicable to municipal, industrial and civil construction projects. Background technique [0002] 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 (see figure 1 , figure 2 ), it is more convenient to relocate some shallow buried pipelines, but it is often difficult to relocate some deep buried large pipelines (buried depth above 8m, pipe diameter above 800mm). The mud used for the retaining wall of the diaphragm will be lost in a large amount from the pipeline, and the groove cannot be completed. Contents of the invention [0003] The technical problem to be solved by the present inve...

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Problems solved by technology

[0002] 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 (see figure 1 , figure 2 ), some shallow-buried pipelines are more convenient to relocate, but some deep-buried large pipelines (buried depth above 8m, pipe diameter above 800mm) are often difficult to relocate. The mud used for the retaining wall of the diaphragm will be lost in a large amount from the pipeline, and the groove cannot be completed

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