A construction method for connecting walls under ground for underground facilities

Abstract

The invention discloses a construction method for underground connection walls under underground facilities. The technical proposal comprises: construction of connection walls on both sides of the far end of a cable trench; trenches below the cable trench formed into grooves, and construction of connection walls on both sides of the cable trench; Replacement of underground facilities, excavation of auxiliary foundation pits; fabrication and installation of partial prefabricated guide walls, installation of segmented reinforcement cage positioning devices, fabrication and installation of reinforcement cage guiding devices; segmented reinforcement cages are transported to the top of the guiding devices through the positioning device , lower the sectioned reinforcement cage; support the formwork for the ground connection wall, and pour concrete. The invention provides convenience for the installation of the steel cage by transporting the segmented steel cage, and can ensure the strength and rigidity of the underground continuous wall after construction.

Description

technical field [0001] The invention relates to the field of foundation pit engineering, in particular to a construction method for underground connection walls under underground facilities. Background technique [0002] The installation of underground connecting walls under underground facilities is easily affected by the existing structures. For example, due to the existence of cable trenches and large steel pipes, underground diaphragm walls cannot be installed under existing cable trenches. Simultaneously, inventor finds, there is following problem during existing underground diaphragm wall construction: [0003] 1) The existing cable trench underpinning method is not suitable for local use; [0004] 2) In some projects, due to the influence of the existing structure, the ground connection wall can only be simply made of plain concrete ground connection wall, the strength and rigidity are far from meeting the construction requirements, and there are hidden dangers in th...

AI Technical Summary

Problems solved by technology

[0003] 1) The existing cable trench underpinning method is not suitable for local use;

[0004] 2) In some projects, due to the influence of the existing structure, the ground connection wall can only be simply made of plain concrete ground connection wall, the strength and rigidity are far from meeting the construction requirements, and there are hidden dangers in the later stage; the traditional guide wall or the existing steel plate guide wall function Sex is not strong;

[0005] 3) The existing groove forming machine cannot meet the horizontal excavation requirements of the groove;

[0006] 4) At present, the overall size of the steel cage is too large, which makes it difficult for the steel cage to enter the groove vertically; there is no suitable machine to install the steel cage in a small space to guide the steel cage

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