Open cut foundation pit supporting and protecting method

Abstract

The invention discloses an open cut foundation ditch timbering method. Firstly, the surface of the foundation ditch is divided into a front side, a back side, a left side and a right side; wherein thefront side borders upon a building or other construction structures with high safety requirement; the front side of the foundation ditch is timbered by a plurality of digging piles; the left side andthe right side of the foundation ditch are both timbered through a plurality of bored lock piles; the back side of the foundation ditch is the open side; and the top parts of the bored lock piles atthe left side, the digging piles at the front side and the bored lock piles at the right side are connected into a whole in series through a long top beam. The method is simple and convenient to operate, easy to carry out and is safe and reliable and high in construction efficiency; therefore the method is applicable to the timbering in foundation ditch construction with high underwater level or poor geological condition.

Description

technical field [0001] The invention relates to a foundation pit support method often used in civil engineering, in particular to an open-cut foundation pit support method. Background technique [0002] Although the foundation pit project is a temporary project, it is usually on the edge of a building or other high-safety engineering structure. In this way, when the foundation pit is constructed, it is necessary to ensure the safety of the existing buildings next to the foundation pit and ensure the safety of the building. The foundation pit is stable and the lateral deformation of the foundation pit is reduced. At present, in order to reduce the large lateral displacement and subsidence of the adjacent buildings caused by the excavation of the foundation pit, there are two foundation pit support methods: one is to use closed foundation pit support, Ring beams and internal supports are set up, and the support rods have a great influence on both the early excavation and the ...

AI Technical Summary

Problems solved by technology

At present, in order to reduce the large lateral displacement and subsidence of the adjacent buildings caused by the excavation of the foundation pit, there are two foundation pit support methods: one is to use closed foundation pit support, Ring beams and internal supports are set up, and the support rods have a great influence on both the early excavation and the later construction. During the excavation of the foundation pit, due to the limitation of the operating space, the soil extraction process is slow and the construction efficiency is low; the other It is to set up prestressed anchor rods. This method is suitable for areas with good geological conditions. It is difficult to control the lateral displacement of the foundation pit for areas with poor geological conditions or dynamic loads, which will affect the buildings or other engineering buildings next to the foundation pit. security

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