Vertical sliding assembly type foundation pit supporting structure and construction method thereof

Abstract

The invention provides a vertical sliding assembly type foundation pit supporting structure and a construction method thereof. The vertical sliding assembly type foundation pit supporting structure comprises a steel stand column, a first steel sliding rail and a second steel sliding rail. A plurality of first steel slide rails are uniformly embedded in the underground diaphragm wall. The diaphragm wall reinforcing structure reinforcing steel bar mesh is welded to the diaphragm wall reinforcing steel bar mesh, and the diaphragm wall reinforcing steel bar mesh is arranged on the face, away from the first steel sliding rail, of the diaphragm wall. At least two layers of horizontal steel supporting mechanisms are arranged, each layer of horizontal steel supporting mechanism is connected with the first steel sliding rail and the second steel sliding rail in a clamped mode through a T-shaped connector, and the horizontal steel supporting mechanism on the top layer is replaced by a reinforced concrete support. According to the vertical sliding assembly type foundation pit supporting structure and the construction method thereof, supporting is conducted firstly, then excavation is conducted, one-time supporting is conducted in place, the technical problem that in the construction process of excavation while supporting, layered excavation and layered supporting, deformation of a diaphragm wall and a soil body behind the wall occurs is solved, and the overall stability of the structure is improved.

Description

technical field [0001] The invention relates to the technical field of foundation pit support in foundation pit excavation, in particular to a vertical sliding assembly type foundation pit support structure and a construction method thereof. Background technique [0002] Excavation of foundation pit is a large-area unloading process, which will cause changes in the stress field of the soil around the foundation pit and ground subsidence. Therefore, constructing the support structure plays a very important role in the excavation of foundation pit. The "ground connection wall + horizontal support structure" currently used in the project generally follows the process of "excavation while supporting, layered excavation, and layered support", that is, after the construction of the ground connection wall is completed, the first support is set. Excavate the earthwork to the second support, set the second support and then excavate the earth to the third support until the earth is e...

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Problems solved by technology

[0004] In order to solve the above problems, the present invention provides a vertical sliding assembled foundation pit support structure and its construction method. A continuous wall strengthening mechanism is arranged on the ground connection wall, and the first steel slide rail, the second The second steel slide rail is equipped with a horizontal steel support mechanism, which realizes support first and then excavation, and supports in place at one time, avoiding ground connection walls and walls during the construction process of excavation while support, layered excavation, and layered support. The technical problem of the deformation of the soil behind the wall improves the overall stability of the structure

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