Construction Method of Diaphragm Wall Meeting Underground Pipeline

Abstract

The invention relates to a construction method for reverse construction of a continuous wall encountering an underground pipeline. The method includes the steps: determining a continuous wall range in which the pipeline cannot be removed and reconstructed, and adjusting continuous wall framings; performing continuous wall construction on two sides of a reverse construction range, wherein the construction includes joint soldering of one side close to the pipeline, reverse construction range water stoppage and reinforcement outside a foundation pit at the joints by jet grouting piles; excavating soil within the pipeline range, performing step excavation, performing suspension protection treatment on the pipeline in the depth range, and constructing the continuous wall in the reverse construction range every one step of excavation, wherein the continuous wall comprises main layout reinforcements and distribution reinforcements; performing sprayed concrete construction, covering and reinforcing a sprayed concrete surface layer with steel plates which are welded with I-beam joints on two sides of the reverse-construction continuous wall; excavating to a base, disposing an I-beam base, and spraying concrete to form a seal bottom. By the steps, the construction method for reverse construction of the continuous wall encountering the underground pipeline is realized, so that pipeline removal and reconstruction cost is saved, and good effect of a construction period is guaranteed.

Description

technical field [0001] The invention relates to the field of construction, in particular to a construction method in which a diaphragm wall constructed in a water-rich area meets an underground pipeline and is reversed. Background technique [0002] In water-rich areas, the enclosure structures for building underground stations and the like are usually designed with continuous walls and internal supports. In layman's terms, after the diaphragm wall is formed and closed, the excavation of the foundation pit is carried out in combination with the precipitation in the pit. When there are power corridors, gas pipes, water supply pipes or rainwater box culverts within the scope of construction (such as underground stations), the enclosure structure of the foundation pit cannot be closed in time. At this time, the usual practice is to wait for the pipeline to be relocated, and then construct the remaining enclosure structure to form a seal; there is also a temporary sealing wall ...

AI Technical Summary

Problems solved by technology

When the relocation of the pipeline is not considered, the enclosure structure within the scope of the pipeline will not be constructed normally or it will be risky to implement in a translational manner (reinforcement cages need to be hoisted close to the high-voltage power cables). The pit is divided into small foundation pits, although a partially closed foundation pit can be formed to facilitate the excavation of the foundation pit, but the pipeline always exists, and there is still the problem of the construction of the enclosure structure within the scope of the pipeline

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