Safety protection method for treatment of high-narrow large-scale karst cave cavity

A technology for large-scale karst caves and safety protection, which is used in earth-moving drilling, wellbore lining, tunnel lining, etc. to ensure safe operation and solve safety protection problems.

Active Publication Date: 2018-04-03
SINOHYDRO BUREAU 11 CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] In order to solve the above-mentioned problems existing in the prior art, the present invention proposes a method for safety protection of high and narrow large-scale karst cave cavities, aiming to solve the problem of construction safety protection in the process of processing similar large-scale karst cave cavities in karst-developed areas

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  • Safety protection method for treatment of high-narrow large-scale karst cave cavity
  • Safety protection method for treatment of high-narrow large-scale karst cave cavity
  • Safety protection method for treatment of high-narrow large-scale karst cave cavity

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Embodiment Construction

[0075] The technical solutions of the present invention will be described in further detail below with reference to the accompanying drawings and embodiments.

[0076] Such as figure 1 Shown, method of the present invention comprises the following steps:

[0077] In the excavation stage of the cave cavity:

[0078] Step 101, sealing the cavity rock surface with shotcrete;

[0079] Step 102, erecting a safety protection steel shed in the cavity of the karst cave;

[0080] Step 103, using high-pressure water to rinse the excavated tunnel face;

[0081] On the right bank, the lower layer of the grouting flat hole passes through the newly opened stage of the karst cave:

[0082] Step 201, locking the newly opened opening in the cave;

[0083] Step 202, protecting the tunnel face upstream of the cave;

[0084] Step 203, carry out grouting operation protection for the section of the grouting flat hole in the lower layer on the right bank;

[0085] In the stage of grouting fla...

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Abstract

The invention discloses a safety protection method for treatment of a high-narrow large-scale karst cave cavity. The method comprises the steps that at the stage of cleaning and digging the karst cavecavity, concrete is sprayed on the rock surface of the cavity to seal the cavity, and a safety protection steel shed is erected in the karst cave cavity; high-pressure water is used for flushing a cleaned and dug tunnel face; at the stage of running through a newly formed cave opening at a grouting flat cave of the lower layer of a right bank, the newly formed cave opening in the karst cave is subjected to opening locking; an upstreaming tunnel face of the karst cave is protected; a cave-forming segment of the grouting flat cave of the lower layer of the right bank is subjected to grouting operation protection; at the lining stage of the grouting flat cave of the lower layer of the right bank and the karst cave cavity, the karst cave cavity is subjected to primary concrete lining sealing;the cave cavity is subjected to structural lining sealing. According to the safety protection method for treatment of the high-narrow large-scale karst cave cavity, effective safety protection measures are adopted at different stages, the safety accident in the treatment period of the karst cave cavity can be effectively prevented, and the operation safety of construction personnel is guaranteed.

Description

technical field [0001] The invention relates to the technical field of safety protection of karst cave cavities, in particular to a method for processing safety protection of high and narrow large karst cave cavities. Background technique [0002] Karst cave is an underground corrosion phenomenon formed by surface water and groundwater through chemical and mechanical damage to soluble rock formations, which brings unsafe and unstable factors to tunnel construction. Therefore, it is very important to carry out safety protection for karst cave cavity treatment. Work. [0003] For example, the Aikou Reservoir is located in Aikou Town, Xiushan Tujia and Miao Autonomous County, Chongqing City, and the reservoir dam is located on the Pingjiang River 500 meters downstream of the confluence of the Cenlong River and the Liangqiao River. The Aikou Reservoir Project is mainly composed of an 86.2m-high asphalt concrete core wall rockfill dam, a 16-meter-wide open spillway, a 55.10m-hig...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21D11/00E21D11/10
CPCE21D11/006E21D11/10
Inventor 孙洪涛邵国兵杜浩亮杨和明杨仲洪
Owner SINOHYDRO BUREAU 11 CO LTD
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