Circumferentially compressible composite well wall and construction method thereof

Abstract

The invention provides a circumferentially compressible composite well wall and a construction method thereof which are most applicable to improving the bearing capability of a vertical well wall. The composite well wall comprises a waterproof outer well wall and a circumferentially compressible inner well wall; and the inner wall is provided with at least one compressible insulating layer. In the construction method, firstly, the waterproof outer well wall is built from top to bottom according to the section height; then the inner wall embedded with the compressible insulating layer is built from bottom to top; and finally the wall is built to the designed height according to the section height. When water and soil pressure effects surrounding the composite well wall, the compressible insulating layer of the inner well wall is compressed for yielding pressure so as to enable the stress to be distributed more evenly along the radial direction of the well wall, thus effectively improving the bearing capability of the well wall, effectively reducing the thickness of the existing well wall, improving the utilization ratio of the shaft section, and reducing the engineering cost to a large extent.

Description

Technical field [0001] The invention relates to a circumferentially compressible composite shaft wall and a construction method thereof, and is particularly suitable for vertical shaft shafts that penetrate deep and thick stratum, and also suitable for roadways and caverns that bear relatively large ground pressure. Background technique [0002] In order to exploit deep mineral resources, more and more mine shafts need to pass through deep topsoil or pore water-bearing soft rock by freezing method. Correspondingly, due to the increase of water and soil pressure around the shaft wall, the shaft wall becomes thicker and thicker. Excessively thick shaft walls not only lead to a sharp rise in sinking costs and a doubled construction period, but also face serious temperature cracks in large-volume concrete. Radial penetrating temperature cracks will make it difficult for the shaft wall to meet the design requirements. Therefore, how to reduce the thickness of the well wall reasonably ...

AI Technical Summary

Problems solved by technology

However, even with this single-layer shaft wall structure and the strength of C100 high-strength concrete, the thickness of the shaft wall will exceed 3m for super-large-diameter, ultra-deep shafts

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