Cutting construction method of high-strength rock-stratum maintain tunnel

A construction method and high-strength technology, applied in the direction of tunneling, earthwork drilling, blasting, etc., can solve the problems such as the unsuitable mountain tunnel hole cutting technology, and achieve the effects of reducing vibration and crushing, increasing the yield of finished products, energy saving and emission reduction

Active Publication Date: 2019-11-15
NO 2 ENG CO LTD OF CCCC FIRST HIGHWAY ENG +1
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Problems solved by technology

[0003] According to the actual investigation, the rock cutting technology is generally seen in various stone mining areas at present, and its application in engineering is limited to some local open-air road cuttings and deep foundation pit excavations caused by blasting restrictions, and some of them are used in tunnels. Partial use of sawing equipment for concrete cutting construction, these are measures taken to overcome some unfavorable factors in the construction process, there is no suitable cutting process in mountain tunnels aimed at mining stone

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  • Cutting construction method of high-strength rock-stratum maintain tunnel

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Embodiment Construction

[0040] The technical solution of the present invention will be clearly and completely described below.

[0041] In order to solve the above problems, the present invention provides a cutting construction method for high-strength rock formation mountain tunnels.

[0042] In order to achieve the technical purpose, the technical solution of the present invention is: a high-strength rock formation mountain tunnel cutting construction method, characterized in that it includes the following steps:

[0043] S1: Set low-velocity explosives on the rock mass to blast the rock mass, and dig out the waste residue generated by the blasting after blasting, and set up anchor bolts to hang the net and spray concrete for initial support, and at the same time strengthen monitoring and measurement work to ensure Surrounding rock stability and construction safety;

[0044] S2: after the blasting in step S1, the lower step rock mass is leveled, and a track is laid on it;

[0045] S3: After the t...

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Abstract

The invention provides a cutting construction method of a high-strength rock-stratum maintain tunnel. The method is characterized in that a microseismic blasting technology adopting presplitting smooth blasting is adopted to reduce the vibration fragmenting effect on lower bench rock mass caused by blasting so as to improve the yield rate, the rock mass is cut through a circular saw and a wire saw, and cut rocks are transported outside. The method has the advantages that the use of initiating explosive devices for in-tunnel explosive operations is reduced by performing the cutting of a high-strength rock-stratum maintain tunnel so as to reduce the dust generated by blasting construction, the vibration damage on a mountain is prevented, the goals of energy saving, emission reduction and resource saving are ultimately achieved, and rare and precious natural resources are ensured to be fully utilized while the engineering benefit is effectively improved.

Description

technical field [0001] The invention relates to the field of tunnel construction, in particular to a method for cutting and constructing high-strength rock formation mountain tunnels. Background technique [0002] At present, the environmental protection situation in our country is becoming more and more serious. In order to curb the excessive mining and deforestation caused by the mining of various economic stones, local governments strictly control the scale of quarry mining. Various types of raw materials, especially high-strength rare raw materials, are in short supply. my country is a mountainous country, and the mountainous area accounts for about two-thirds of the country's land area. [0003] According to the actual investigation, the rock cutting technology is generally seen in various stone mining areas at present, and its application in engineering is limited to some local open-air road cuttings and deep foundation pit excavations caused by blasting restrictions, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F42D3/04F42D1/00E21D9/10
CPCE21D9/10F42D1/00F42D3/04
Inventor 聂佳佳解长渊陈江平董云罗家宇马亮余侠张威卜祥珂
Owner NO 2 ENG CO LTD OF CCCC FIRST HIGHWAY ENG
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