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A method for safe protection of high and narrow large karst cave cavities

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

Active Publication Date: 2019-07-19
SINOHYDRO BUREAU 11 CO LTD
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  • Claims
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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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  • A method for safe protection of high and narrow large karst cave cavities
  • A method for safe protection of high and narrow large karst cave cavities
  • A method for safe protection of high and narrow large karst cave cavities

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Embodiment Construction

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

[0076] Such as figure 1 As shown, the method of the present invention includes the following steps:

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

[0078] Step 101: Seal the cavity rock face with sprayed concrete;

[0079] Step 102, erect a safety protection steel shed in the cavern cavity;

[0080] Step 103: Use high-pressure water to rinse the excavated face;

[0081] Grouting the flat hole in the lower layer of the right bank to pass through the karst cave and the new opening stage:

[0082] Step 201: Lock the newly opened hole in the cave;

[0083] Step 202: Protect the upstream face of the cavern;

[0084] Step 203: Perform grouting operation protection on the formed section of the grouted flat hole on the right bank;

[0085] In the lining stage of grouting flat cave and karst cave cavity in the lower layer of the right bank: ...

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Abstract

The invention discloses a method for safety protection of high and narrow large-scale karst cave cavities, which comprises: in the stage of clearing and excavating the karst cave cavity: sealing the cavity rock surface with sprayed concrete and erecting a safety protection steel shed in the karst cave cavity; High-pressure water washes the tunnel surface after clearing and excavation; the grouting flat tunnel in the lower layer on the right bank passes through the newly opened opening of the karst cave: lock the newly opened opening in the karst cave; protect the tunnel upstream of the karst cave; the grouting flat tunnel in the lower layer on the right bank has been The grouting operation protection is carried out in the tunnel forming section; in the stage of grouting the lower layer of the right bank and the lining of the karst cave cavity: the preliminary concrete lining and sealing of the karst cave cavity; the structural lining and sealing of the karst cave cavity. The method for safety protection of high and narrow large-scale karst cave cavity treatment provided by the present invention can effectively prevent safety accidents during the treatment of karst cave cavities through effective safety protection measures taken in stages, and ensure the safe operation of construction personnel.

Description

Technical field [0001] The invention relates to the technical field of safety protection of karst caverns, in particular to a method for safety protection of large-scale karst caverns with high narrowness. Background technique [0002] Karst caves are underground dissolution phenomena formed by surface water and groundwater's chemical and mechanical damage to soluble rock formations, which bring unsafe and unstable factors to tunnel construction. Therefore, it is very important to protect the cavern cavity safely. jobs. [0003] For example, Aikou Reservoir is located in Aikou Town, Xiushan Tujia and Miao Autonomous County, Chongqing. The dam of the reservoir is located on the Pingjiang River 500 meters downstream from the confluence of Cenlong River and Liangqiao River. The Aikou Reservoir pivot project is mainly composed of an 86.2m high asphalt concrete core wall rockfill dam, a 16m wide open spillway, a 55.10m high bank inclined horizontal water intake tower and a diversion tu...

Claims

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Application Information

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Patent Type & Authority Patents(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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