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Circumferentially compressible composite well wall and construction method thereof

A technology of well wall and circumferential direction, which is applied in the field of roadway, tunnel, vertical shaft and wellbore to achieve the effect of improving utilization rate, uniform tangential stress distribution and easy construction

Active Publication Date: 2012-09-05
CHINA UNIV OF MINING & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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

Method used

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  • Circumferentially compressible composite well wall and construction method thereof
  • Circumferentially compressible composite well wall and construction method thereof

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Embodiment Construction

[0010] An embodiment of the present invention will be further described below in conjunction with accompanying drawing:

[0011] The circumferentially shrinkable composite shaft wall of the present invention is mainly composed of a reinforced concrete outer shaft wall 1, an inner shaft wall 2 and a compressible interlayer 3, wherein the compressible interlayer 3 is arranged axially along the wellbore and is compressible The interlayer 3 is arranged in the inner shaft wall 2. According to the actual situation on site, at least one compressible interlayer 3 may be provided, and two, three or four interlayers may also be provided. figure 1 4 bars are shown. The compressible interlayer 3 is a compressible structure formed of one, two or more materials among foam board, steel, wood and rubber, and its compression rate is not less than 20%.

[0012] The construction method of the circumferentially compressible composite shaft wall of the present invention: form a water-proof curtai...

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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 builtfrom 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 passing through deep formations, and also suitable for roadways and caverns bearing relatively large ground pressure. Background technique [0002] In order to exploit deep mineral resources, more and more mine shafts need to use the freezing method to pass through the deep topsoil layer or porous water-bearing soft rock layer. Correspondingly, due to the increase of water and soil pressure around the shaft wall, the shaft wall is getting thicker and thicker. Excessively thick well walls not only lead to a sharp increase in the cost of sinking wells and double the construction period, but also face the serious problem of large-volume concrete temperature cracks. Radial penetrating temperature cracks will make it difficult for the water sealing performance of the well wall to meet the des...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21D5/11E21D11/10
Inventor 杨维好黄家会任彦龙
Owner CHINA UNIV OF MINING & TECH
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