Well wall structure and construction method of a water-bearing rock formation

Abstract

A well wall structure and a construction method of a water-bearing rock formation, which belong to a well wall structure and a construction method. The well wall is the anchor rod I, anchor rod II, steel skeleton and concrete poured in the entire network frame to form the cylindrical well wall; firstly, the anchor rod I and anchor rod II are constructed on the surrounding rock mass Then bind the steel frame of the well wall, and connect the anchor rods I and II with the steel frame, and connect the pre-embedded grouting pipe; then set up the formwork and pour concrete; after the well wall is demolished and reaches a certain strength, screw the end nut , apply pre-tightening force to the anchor rod II; finally carry out grouting through the pre-embedded grouting pipe in the anchor rod II, the grout passes through the grout hole, and fills the pores at the interface between the well wall and the surrounding rock mass. After the grouting is completed, close the valve ;Advantages: The radial stiffness of the well wall is improved through the joint bearing of the well wall and the surrounding rock, avoiding the accumulation of high-pressure water on the outer surface of the well wall; under the same section size and material conditions, it has higher bearing capacity and greatly reduces the project cost. Improve security.

Description

technical field [0001] The invention relates to a well wall structure and a construction method, in particular to a well wall structure and a construction method of a water-bearing rock formation. Background technique [0002] The construction of underground projects such as vertical shafts and inclined shafts first faces the design problem of the shaft wall (supporting structure). For water-free or shallow low-pressure water-bearing rock formations, due to the small load, the design and construction of the shaft wall are less difficult, and the engineering safety can be guaranteed. [0003] However, the existing shaft and inclined shaft wall design codes do not pay attention to the value of hydraulic load in rock formations; and for deep water-bearing rock formations, water pressure is the most important load on the shaft wall. If the water pressure is not considered correctly, the design thickness of the well wall will be too thin, resulting in the well wall being unable ...

AI Technical Summary

Problems solved by technology

In the high water pressure rock formation, the shaft wall structure poured by this process, on the one hand, there is no other bonding and anchoring effect between the shaft wall and the surrounding rock mass except for the natural bonding force between the concrete and the surrounding rock. Give full play to the bearing capacity of the surrounding rock mass itself; on the other hand, once the well wall structure is compressed inward, it is easy to peel off from the surrounding rock mass, resulting in the accumulation of external water pressure and bearing greater water pressure

Images