A kind of treatment method of steel sheet pile supporting foundation pit piping

Abstract

The invention belongs to the technical field of on-site construction, and specifically discloses a treatment method for steel sheet piles to support foundation pit piping. If only steel sheet piles are used for support, when the steel sheet piles are buried too deep to pass through an underground aquifer, the pressure of groundwater will be too large. The steel sheet pile will be deformed and displaced into the foundation pit, so the phenomenon of piping at the bottom of the foundation pit occurs. Therefore, in this scheme, a steel pipe is attached to the outside of the steel sheet pile as a cofferdam, a conduit is placed to guide the drainage, and the anti-filter material is added and grouted The steel pipe pile is formed, and the anti-filter material is added to the water gushing area in the pit, and the steel pipe piles are made on both sides of the water gushing area. After the steel pipe pile at the bottom of the foundation pit is completed, a concrete cushion is laid at the bottom of the foundation pit; The bolt is inserted obliquely into the hole, and the bolt is welded with the steel support to ensure the stability of the steel sheet pile and overcome the purpose of foundation pit piping, which has better practical application and promotion value.

Description

technical field [0001] The invention belongs to the field of on-site construction, and in particular relates to a method for managing the piping of a steel sheet pile supporting a foundation pit. Background technique [0002] With the continuous development of urban construction, the scarcity of land resources has caused people to develop into underground space. Various types of super-large and ultra-deep foundation pits continue to emerge, and the construction risks and construction technical requirements of foundation pits continue to increase; It often brings more difficulties to the construction, especially in the sites with high groundwater level, high water content and high pressure head, the phenomenon of piping in the foundation pit often occurs. The plan is particularly important. [0003] At present, most of the measures to control the foundation pit piping are to arrange high-pressure jetting piles on both sides of the water inflow point outside the pit as a wate...

AI Technical Summary

Problems solved by technology

[0003] At present, most of the measures to control the piping in the foundation pit are to arrange high-pressure jet grouting piles on both sides of the water gushing point outside the pit as a water-stop curtain, and grouting in the pit is blocked. In this water gushing treatment method, the high-pressure jet jetting piles need to be drilled The hole is then sprayed with cement slurry. If the pile hole encounters a high-pressure underground, the hole collapse phenomenon will easily occur in the water pile, which will increase the construction difficulty; slurry ratio control

Images