Construction method for existing supporting system connected into subway in complex geology and environment

Abstract

The invention discloses a construction method for an existing supporting system connected into a subway in the complex geology and environment. The construction method comprises the following steps that a point is selected from an underground diaphragm wall system to be built as a first axis point, and two intersecting surfaces of an original underground diaphragm wall supporting system of an original subway station and the underground diaphragm wall system to be built are set; a new underground diaphragm wall is built from the first axis point to the first connection surface to form a closed structure; an angular point closest to the first connection surface and the second connection surface is selected from the closed structure as a second axis point, and then two rows of third three-axis mixing piles are driven on the left side and the right side of a set third new underground diaphragm wall to be built from the second axis point to the second connection surface; and cement is poured into the spaces among first three-axis mixing piles, second three-axis mixing piles and the third three-axis mixing piles in sequence to form the first new underground diaphragm wall, the second new underground diaphragm wall and the third new underground diaphragm wall. By means of the method, the structural stability and the waterproof effect are improved.

Description

Technical field [0001] The invention relates to a construction method for connecting to an existing support system of a subway, in particular to a construction method of a connecting wall connected to an existing support system of a subway with complex geology and environment. Background technique [0002] The diaphragm wall originated in Italy. After decades of development, the diaphragm wall technology has been quite mature. It was introduced to China in the middle of the last century. It was originally only used as a retaining wall for foundation pits and as an anti-seepage wall. As the urban land becomes increasingly tense , The emergence of high-rise and super-high-rise buildings, it has developed from being an outdoor basement wall to a load-bearing foundation for high-rise buildings, greatly enhancing the overall carrying capacity of the building, and relatively reducing costs, especially with the continuous improvement and improvement of construction technology, The devel...

AI Technical Summary

Problems solved by technology

This patent discloses the ground connection wall of cast-in-place rectangular support piles by immersed tubes, which is not suitable for the construction method of ground connection wall support in the surrounding area of ​​this application, which is close to the subway station and has complex geology.

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