Supporting and protecting structure of foundation pit compound pile wall

Abstract

The invention discloses a supporting and protecting structure of a foundation pit compound pile wall. The supporting and protecting structure comprises four spiral ground piles. Supporting blocks penetrate through the four spiral ground piles respectively and are each rotationally connected with a vertical plate. The side wall of one end of each vertical plate is fixedly provided with a limiting block. The two vertical plates on each same side form a group, two second supporting plates and a second connecting plate are arranged between the opposite side walls of the two vertical plates in eachgroup, the second connecting plate is located at the lower ends of the second supporting plates, and the two second supporting plates correspond to each other. By improving supporting and protectingstructure, the problem that foundation pit compound pile walls of more specifications cannot be supported or protected is solved; by adjusting the length and width of the supporting and protecting structure, different compound pile walls can be supported and protected; by adjusting the angle, supporting and protecting at different angles can be conducted, construction cost is reduced, safety and practicability are improved, the rigidity and strength of the supporting and protecting structure are improved, and use is convenient.

Description

technical field [0001] The invention relates to the technical field of foundation pit support, in particular to a support structure for a composite pile wall of a foundation pit. Background technique [0002] Foundation pit support is a temporary support, reinforcement, protection and groundwater control measure for the foundation pit to protect the safety of the underground main structure construction and the surrounding environment of the foundation pit. In many construction fields, such as open-cut subway tunnels, it is necessary to excavate the tunnel first, and then temporarily support the excavated foundation pit, and then carry out the support structure of the structural construction on the bottom of the foundation pit. [0003] There are many reports about the support structure in the prior art. The patent of CN108442385A discloses a support structure for the composite pile wall of the foundation pit. Benefits, and it has good benefits in saving underground space re...

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Problems solved by technology

[0003] There are many reports about the support structure in the prior art. The patent of CN108442385A discloses a support structure for the composite pile wall of the foundation pit. Benefits, and it has good benefits in saving underground space resources, reducing soil displacement, protecting the surrounding environment, shortening the construction period, etc., but the security of this patent is poor, and it does not have the function of adjusting the angle and length according to the foundation pit , poor practicality

[0004] The patent of CN206385547U discloses a prefabricated pile composite retaining wall structure for foundation pit support. This patent improves the lateral compression resistance. In order to obtain the same lateral compression resistance, it is not necessary to insert the pile body into a deeper position. In addition, there is no need to use longer prefabricated piles, which saves materials and reduces construction costs. It does not need to be inserted into a deeper position and speeds up the construction progress. However, while saving materials, the stability is poor, resulting in the inability to form a whole for protection. Reduced safety factor

[0005] The patent of CN205296170U discloses a kind of composite row pile foundation pit support structure, and this patent has rear row concrete wall and can form pulling force to front row support pile and share the shearing force of slope sliding soil to pile, change passive support The protection is an active support, which fully exerts the bending resistance of the pile body, improves the stiffness, shear strength and integrity of the support structure, but cannot improve the stiffness and shear strength of the support structure, and cannot be applied to More specifications for foundation pit protection, poor practicability

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