Medium fracture surface karst tunnel micro step one-time detonation construction method

A construction method and micro-step technology, which is applied in tunnels, blasting, tunnel lining, etc., can solve the problems of large amount of temporary support, low construction efficiency, and inverts cannot be closed in time, so as to increase the overall stability and speed up the construction progress , the effect of improving the correctness

Active Publication Date: 2020-06-30
CCCC FOURTH HIGHWAY ENG
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

This kind of construction technology has a large amount of temporary support and low construction efficiency, and a certain distance needs to be drawn between the lower step and the upper step, and the inverted arch cannot be closed in time

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  • Medium fracture surface karst tunnel micro step one-time detonation construction method
  • Medium fracture surface karst tunnel micro step one-time detonation construction method
  • Medium fracture surface karst tunnel micro step one-time detonation construction method

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Embodiment Construction

[0070] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. The components of the embodiments of the invention generally described and illustrated in the figures herein may be arranged and designed in a variety of different configurations.

[0071] Accordingly, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art wi...

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Abstract

The invention discloses a medium fracture surface karst tunnel micro step one-time detonation construction method. The medium fracture surface karst tunnel micro step one-time detonation constructionmethod comprises the following steps that firstly, a micro step is excavated and formed in a karst tunnel; secondly, a cantilever type integral rack is placed at the proper position; thirdly, before drilling, construction personnel adopts a total station to determine the center line and the arch roof face elevation of the karst tunnel, and the excavated outline of the tunnel karst is set; fourthly, shot hole positions of cutholes, auxiliary holes and surrounding holes are arranged, and an automatic drilling device is used for conducting drilling operation so that detonation holes can be obtained; fifthly, detonation materials are arranged in the detonation holes, and the detonation holes are connected together; sixthly, the cantilever type integral rack is removed, detonation operation isexecuted on the detonation holes, and accordingly a detonated tunnel is obtained; and seventhly, after detonation, ventilation is conducted. A step method is adopted in the karst tunnel for conductingone-time all-fracture-surface detonation construction, and an upper step and a lower step (inverted arches) are detonated and excavated at the same time.

Description

technical field [0001] The invention belongs to the technical field of tunnel construction, and in particular relates to a micro-step primary blasting construction method of a medium-section karst tunnel. Background technique [0002] Karst (also known as karst Karst) refers to soluble rock formations, such as carbonate rock formations (limestone, dolomite), sulfate rock formations (gypsum) and halogen rock formations (rock salt). Fissures and cavities, as well as the general term for phenomena and functions such as pits and depressions on the surface due to the collapse of the roof of the cavity. The construction of the tunnel has a certain influence on the karst cave. The tunnels under such geological conditions are called karst tunnels. [0003] With the rapid development of engineering technology in mainland China and the improvement of transportation and other infrastructure standards, it is inevitable to choose tunnels to cross complex terrain in the selection of e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21D9/00E21D11/10E21F16/02E21D9/12E21B15/00G01V11/00G01V8/10G01V1/30G01S13/88G01N21/84F42D3/04F42D1/00
CPCE21B15/00E21B15/003E21D9/006E21D9/122E21D11/105E21F16/02F42D1/00F42D3/04G01N21/84G01S13/88G01S13/885G01V1/306G01V8/10G01V11/00
Inventor 周治发宋战平范胜元王士坤何宏宇赵海阳刘静杨利波
Owner CCCC FOURTH HIGHWAY ENG
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