Moisture-trapping loess foundation pit anti-slip electric sintering supporting pile

Abstract

The invention relates to the technical field of foundation pit supporting equipment. A moisture-trapping loess foundation pit anti-slip electric sintering supporting pile comprises a main pile pipe, an upper pile extension pipe, a core pipe, a steel wire electrode, an expansion anchor top and an expansion anchor top brush ball; the main pile pipe is a plastic steel circular pipe, a plurality of electrode holes are formed in the side face of the main pile pipe, the upper end of the main pile pipe is detachably connected with the upper pile extension pipe, the lower end of the main pile pipe isprovided with the expansion anchor top, the expansion anchor top is composed of an anchor point, at least two anchor rods and an anchor rod hinge shaft, the anchor point is installed at the end of thelower end of the main pile pipe, the anchor rods are symmetrically and obliquely arranged along the central axis of the main pile pipe, and anchor grooves are formed in the side wall of the main pilepipe at the anchor rods; and the core pipe is a cylindrical plastic part and sleeves the upper strut pipe, and the core pipe is provided with an electrode socket, a socket connecting lead and a brushpush rod. According to the moisture-trapping loess foundation pit anti-slip electric sintering supporting pile, under the condition that the earthwork engineering quantity is not increased, the supporting and reinforcing effect close to reinforced soil is achieved in a sintering mode of an electric arc breakdown soil layer, and the safety of the foundation pit operation in the wet-trapping loessenvironment is effectively improved.

Description

Technical field: [0001] The invention relates to the technical field of foundation pit supporting equipment. Background technique: [0002] As a special soil, loess is characterized by structure, undercompaction and collapsibility. Among them, collapsibility is the core characteristic of loess, specifically, after the soil is immersed in water, due to the self-weight stress of the overlying soil layer, or under the joint action of self-weight stress and additional stress, the soil structure will rapidly change. damage and produce significant additional sinking. Collapsible loess in Gansu Province is mainly distributed in Longxi and Longdong. The collapsible loess in this area is widely distributed, and the thickness of the collapsible loess layer is usually greater than 10m. The subgrade collapsibility grades are mostly grades III and IV, and the collapsibility sensitivity is high, which is very harmful to the engineering construction. [0003] It is very difficult to rei...

AI Technical Summary

Problems solved by technology

[0003] It is very difficult to reinforce the engineering foundation pit in the collapsible loess environment. The reinforcement effect of foundation piles alone is poor, and the use of row piles or masonry cofferdams requires more engineering materials and is difficult to recycle. For example, although the best reinforcement effect can be achieved by using the reinforced soil engineering method, the excavation scale of the foundation pit needs to be greatly increased during the operation process. The increase in the engineering earthwork volume is huge and takes a long time, which has a great impact on the construction period.

Images