Fabricated foundation pit slope supporting structure

Abstract

The invention discloses a fabricated foundation pit slope supporting structure. The supporting structure comprises a plurality of fixing plates, anchor piles are fixedly connected to the lower ends of the fixing plates, anchor cables penetrating through the fixing plates are fixedly connected to the interiors of the anchor piles, the exteriors of the anchor cables are fixedly connected with limiting blocks located at the upper ends of the fixing plates, the upper ends of the fixing plates are movably connected with fixing columns located at the exteriors of the limiting blocks, and the upper ends of every two adjacent fixing columns are movably connected with a first limiting rod. The fabricated foundation pit slope supporting structure has the advantages of being convenient to construct, short in construction period, high in resource utilization rate, high in protection performance and the like, and solves the problems that in high-pressure jet grouting pile construction, a large amount of slurry is discharged, pollution is prone to being caused, permafrost in a karst section without fillers cannot be used, channel steel sheet piles cannot block water and fine particles in soil, the supporting rigidity is small, deformation is large after excavation, and certain use limitation exists.

Description

technical field [0001] The invention relates to a foundation pit support, in particular to an assembled foundation pit side slope support structure. Background technique [0002] Foundation pit support is to ensure the safety of the underground structure construction and the surrounding environment of the foundation pit. The support, reinforcement and protection measures are adopted for the side wall of the foundation pit and the surrounding environment. The industry standard of the People's Republic of China "Technical Regulations for Building Foundation Pit Support" "JGJ120-2012 defines the foundation pit support as follows: in order to protect the safety of the underground main structure construction and the surrounding environment of the foundation pit, the measures for temporary support, reinforcement, protection and groundwater control adopted for the foundation pit. [0003] At present, high-pressure jet grouting piles and channel steel sheet piles are mainly used for...

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Problems solved by technology

[0003] At present, high-pressure jet grouting piles and channel steel sheet piles are mainly used for foundation pit slope support. The material used for high-pressure jet grouting piles is also cement slurry. It uses high-pressure rotating nozzles to spray cement slurry into the soil layer and mix with the soil. Cement-soil reinforcement is formed, overlapping each other to form row piles, which are used to retain soil and stop water. Channel steel sheet pile is a simple steel sheet pile enclosure wall, which is composed of channel steel positive and negative buckles lapped or side by side. However, During the construction of high-pressure rotary grouting piles, a large amount of mud is discharged, which is likely to cause pollution. It cannot be used for permafrost in karst areas without fillers, while channel steel sheet piles cannot retain water and fine particles in the soil, and the support rigidity is small. The deformation after excavation is relatively large, and there are certain use restrictions. Therefore, a prefabricated foundation pit slope support structure is proposed to solve the above-mentioned problems.

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