Underground continuous wall construction method of city-across pipeline

Abstract

The invention provides an inter-city pipeline underground continuous wall construction method. Through the adoption of the method in the construction, the integrity of the underground continuous wall is good, the verticality is high, the anti-penetration performance is good, the wall body can be successfully sealed, the pollution to the surrounding environment is less, and the underground structures can be better protected. The inter-city pipeline underground continuous wall construction method comprises the following steps: the pipeline is dug, examined and reinforced; wall guiding construction is performed in the pipeline scope; groove building construction is performed, which comprises: firstly, soil masses at both sides of the pipeline are dug with a groove milling machine; secondly, a guiding track frame is arranged along one side of the pipeline; thirdly, a reversible cutting machine is placed in the track guiding frame; and fourthly, the soil masses under the pipeline are laterally milled with the reversible cutting machine; after the groove is milled, a reinforcement cage is hanged in; and the concrete is poured into the pipe.

Description

technical field [0001] The invention relates to a construction of an underground diaphragm wall, in particular to a method for constructing an underground diaphragm wall under a cross-urban pipeline. Background technique [0002] Underground space development projects in modern cities are often difficult to construct due to the complex distribution of underground pipelines. Underground obstacles such as crossing urban pipelines have a greater impact on the foundation pit enclosure structure for underground space development. [0003] For example, the commonly used construction methods in urban subway construction include open-cut method, cover-excavation method and mixed construction method. figure 1 As shown), before the construction, the original underground pipeline 120 that crosses the underground connection wall 110 in the construction scope is cut and changed to a new pipeline 130, and the pipeline is cut and changed back after the main structure of the subway is comp...

AI Technical Summary

Problems solved by technology

Although the closure of the underground diaphragm wall 110 structure can be ensured, the resulting pipeline cutting and modification takes too long and costs a lot, and the problem of pipeline cutting and modification often occurs and affects the progress of the project, resulting in a sharp increase in the overall cost of the project construction

[0004] If in-situ protection measures for pipelines are taken, the current conventional technology cannot guarantee the sealing of the underground diaphragm wall structure, and the sealing performance of the underground diaphragm wall structure will directly affect the stability of the foundation pit. Measures to improve the safety level of the foundation pit

However, in actual construction, these methods will lead to low stability coefficient of underground diaphragm wall, poor anti-seepage effect, large cable displacement, and poor protection of underground pipelines.

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