Rapid excavation method of rail transit hard rock stratum connection passage
A communication channel and rail transit technology, which is applied in the excavation field of rail transit communication channels, can solve problems such as different excavation methods, small safety risks, and lithological differences, and achieve the effects of high construction efficiency, low construction risk, and convenient construction
Active Publication Date: 2020-11-17
JINAN RAILWAY TRANSPORT GRP CO LTD
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Problems solved by technology
[0004] Mature underground excavation construction and freezing method are adopted for communication passages in high water level formations, sandy formations, saturated soft soil formations, and complex construction environments. For communication passages in hard rock formations, the safety risk is relatively small, and the excavation method Due to problems such as differences in lithology and lithology in different regions, a relatively systematic and mature rapid excavation construction method has not been formed.
The inventors found that the communication channels in hard rock formations are generally constructed by using the method of blasting steps with artificial pneumatic picks, which is difficult to achieve safe and rapid excavation
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[0034] It should be noted that the following detailed description is exemplary and intended to provide further explanation of the present invention. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.
[0035] It should be noted that the terminology used here is only for describing specific embodiments, and is not intended to limit exemplary embodiments according to the present invention. As used herein, unless the invention clearly states otherwise, the singular form is also intended to include the plural form. In addition, it should also be understood that when the terms "comprising" and / or "comprising" are used in this specification, their Indicate the presence of features, steps, operations, means, components and / or combinations thereof;
[0036] For the convenience of description, if the words "up", "down", "left" and "right" appear in th...
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The invention discloses a rapid excavation method of a rail transit hard rock stratum connection passage. The method comprises the following steps of reinforcing duct pieces at an opening of the connection passage, and drilling a horizontal probe hole in the connection passage; removing the duct pieces on the side part of the connection passage, and erecting an excavation platform at the excavation part of the connection passage; conducting drilling and coring on the periphery of an excavation face, and conducting punching and presplitting in the middle of a tunnel face; and conducting chipping on the tunnel face, removing slag and continuing to conduct excavation, and conducting anchor spraying sealing on the excavation face.
Description
technical field [0001] The invention belongs to the technical field of excavation of rail transit communication passages, and in particular relates to a rapid excavation method for rail transit communication passages in hard rock formations. Background technique [0002] The statements herein merely provide background information related to the present invention and do not necessarily constitute prior art. [0003] In recent years, in urban rail transit construction areas, the shield method has become the mainstream construction method for interval construction due to its advantages of safety, rapid construction, and low impact on the environment. The communication channel is a fire evacuation project located between the left line and the right line of the tunnel section. As an auxiliary project of the shield tunneling method, the connecting channel between the shield tunnels has gradually been paid attention to by people because of the stress redistribution in the tunnel o...
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IPC IPC(8): E21D9/00E21D11/00E21D11/08E21D11/10
CPCE21D9/00E21D11/003E21D11/08E21D11/10
Inventor 弭彬王建涛石锦江海涛陈奎张文静弭辉
Owner JINAN RAILWAY TRANSPORT GRP CO LTD