Single-layer well wall with grouting water stop connecting piece and construction method thereof

Abstract

The invention belongs to the technical field of mine construction engineering, and particularly relates to a single-layer well wall with a grouting water stop connecting piece and a construction method thereof. The single-layer well wall comprises an upper-section well wall and a lower-section well wall, a construction joint is arranged between the upper-section well wall and the lower-section well wall, the upper-section well wall and the lower-section well wall are connected through the grouting water stop connecting piece at the construction joint, the grouting water stop connecting piece comprises a flexible pipe, and the flexible pipe is in a closed ring shape and is embedded between the upper-section well wall and the lower-section well wall; and the upper end and the lower end of the flexible pipe are fixedly connected with steel plate edges, the steel plate edges are embedded in the upper-section well wall and the lower-section well wall correspondingly, a grout outlet hole is formed in the flexible pipe and faces the construction joint in the side, close to the outer wall of a shaft, a grouting pipe is further arranged on the flexible pipe, and a grouting opening is reserved in the grouting pipe and in the inner wall of the shaft. The well wall is convenient to construct and good in overall water sealing performance, the thickness of the needed well wall is obviously smaller than that of an existing double-layer composite well wall under the same condition, and the manufacturing cost of the well shaft in a deep and thick water-rich stratum can be obviously saved.

Description

technical field [0001] The invention belongs to the technical field of mine construction engineering, and in particular relates to a single-layer shaft wall with a grouting water-stop connector and a construction method thereof. Background technique [0002] Wellbores in water-rich strata in my country are mostly excavated by artificial freezing method, and the mainstream support structure is double-layer reinforced concrete composite well wall with plastic interlayer, that is, double-layer composite well wall. [0003] The double-layer composite well wall is composed of the inner well wall, the outer well wall and the interlayer of plastic plates between the walls. For the wellbore in the soil layer, a foam board is also arranged between the outer well wall and the soil layer. The wall material of the inner and outer well walls is concrete, and steel bars are arranged when necessary. The outer shaft wall is poured in sections from top to bottom, and there are construction ...

AI Technical Summary

Problems solved by technology

The increase in the thickness of the well wall not only leads to a rapid increase in the cost of the wellbore, but also increases the difficulty of preventing and controlling the cracking of the well wall due to the increase in the volume of concrete pouring, which makes it difficult to ensure the water sealing performance of the well wall

Images