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Construction method for shield tunnel boulder exploration and blasting treatment

A shield tunneling and construction method technology, which is applied in blasting, tunneling, earthwork drilling and mining, etc., can solve the problems of complicated calculation process of explosive unit consumption, high cost, poor accuracy of boulder survey, etc., to reduce calculation complexity, Reduce costs and prevent the splashing of gravel

Active Publication Date: 2017-03-22
CHINA RAILWAY 16 BUREAU GRP BEIJING METRO ENG CONSTR +2
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Problems solved by technology

[0004] Aiming at the shortcomings of the prior art methods, the present invention proposes a construction method for processing boulders by deep hole blasting using exploration drilling, which overcomes the problems of poor boulder survey accuracy, high cost and unit consumption of explosives in the prior art The disadvantages and deficiencies such as complicated calculation process have realized the high-efficiency and low-consumption boulder controlled blasting

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  • Construction method for shield tunnel boulder exploration and blasting treatment
  • Construction method for shield tunnel boulder exploration and blasting treatment
  • Construction method for shield tunnel boulder exploration and blasting treatment

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Embodiment Construction

[0069] The present invention will be described in detail below in conjunction with specific embodiments. The following examples will help those skilled in the art to further understand the present invention, but do not limit the present invention in any form. It should be noted that those skilled in the art can make several modifications and improvements without departing from the concept of the present invention. These all belong to the protection scope of the present invention.

[0070] A subway tunnel section is proposed to be built at a site in Guangzhou, with a total length of 1733.2m, and it is proposed to use earth pressure balance shield for excavation construction. In the preliminary geological exploration stage, a total of 17 boulders were exposed in the tunnel section, among which a large boulder was 3.87m thick and buried at a depth of -19.32m, and the rock was moderately weathered granite gneiss. The method of geological drilling detailed survey combined with de...

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Abstract

The invention provides a construction method for shield tunnel boulder exploration and blasting treatment. The method comprises the following steps: the boulder detailed exploration is performed around a geologic drilling hole for exposing a boulder; after boulder burying information is proved, the geologic drilling hole for the boulder detailed exploration is used as a boulder blasting gun hole and a pressure release hole; stemming is used for filling in the gun hole; liquid-state explosive is precisely put in the gun hole; a blasting protector is distributed on the gun hole; safety alert is arranged around the blasting area; after the blasting is finished, the safety alert is relieved; and the grouting sealing is performed for the gun hole and the pressure release hole. The construction method reduces construction steps, shortens the construction period, largely reduces the boulder treatment cost, and improves the blasting control precision.

Description

technical field [0001] The invention relates to a method for treating boulders, in particular to a construction method for deep hole blasting of boulders by using geological drilling holes for boulder exploration. Background technique [0002] With the rapid development of my country's infrastructure, more and more subway tunnels have been put into construction. However, in the vast South China region of our country, due to the significant weathering effect, most tunnel constructions have encountered the influence of spherical weathered boulders. Boulders are not only hard in rock quality, but also have poor self-stability in the soil layer and are not easy to cut. During the progress of shield tunneling construction, it often causes the tunnel excavation surface to become unstable, resulting in severe tool wear and delays in the construction period. Therefore, during the advancement of the shield tunnel, boulder pretreatment is required in advance. The traditional method...

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Application Information

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IPC IPC(8): F42D3/04F42D1/00E21B49/00E21D9/00
CPCE21B49/00E21D9/006F42D1/00F42D3/04
Inventor 朱小藻赵洪星沈水龙陈牧吴怀娜吴琼苏建丰莫崇杰陈和张益柱储志坚余贵良赵思明乔玉许垂藩
Owner CHINA RAILWAY 16 BUREAU GRP BEIJING METRO ENG CONSTR
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