Advanced prediction method of unfavorable geology of tunnel construction

A technology of advanced geological prediction and tunnel construction, which is applied in seismology, geophysical measurement, seismic signal receiver, etc., can solve the problems of inaccurate prediction of tunnel geological conditions and single survey method, and achieve accurate and reliable results with different methods Re-simplification, the effect of improving safety

Inactive Publication Date: 2019-09-10
武汉中科岩土工程有限责任公司
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Problems solved by technology

At the same time, according to different geographical environments, the methods of advanced geological prediction used in tunnel construction are also different, all of which require on-site construction personnel to conduct a certain degree of expl

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  • Advanced prediction method of unfavorable geology of tunnel construction

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[0028] In an embodiment, a method for advanced prediction of poor geological conditions during tunnel construction includes the following steps:

[0029] Step 1: Use the geological survey method to survey the surrounding environment of the tunnel and make a geological sketch.

[0030] The geological sketch includes the prediction of the lithology and position of the rock formation, the prediction of the length of the tunnel affected by the band-shaped bad geological body, and the prediction of the length of the tunnel affected by the bad geological body. Specifically, the geological sketch of the rock strata is carried out on the tunneling face to measure the production and thickness of the rock. Observe and obtain the mineral composition and content of the rock, structural and structural features, special signs, the stable state of the front or side of the tunneling face, the occurrence of the rock formation, the degree of lithological weathering, the degree of joint fissure develo...

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Abstract

The invention discloses an advanced prediction method of unfavorable geology of tunnel construction. The method comprises the steps of: surveying the surrounding environment of an advancing tunnel andsketching the geology; surveying the advancing tunnel by a geophysical prospecting method to determine an unfavorable geological section; acquiring and confirming unfavorable geological data of the to-be-advanced tunnel area by an advanced drilling method; and, performing the advanced prediction of the unfavorable geology. The geophysical prospecting method comprises a seismic wave reflection method, an infrared detection method and a geological radar detection method. After surveying the surrounding environment and sketching the geology, the blasthole position, the search angle and the tuning angle are determined; the geology of the total length of the advancing tunnel is surveyed by the seismic wave reflection method, so as to determine the suspicious section of the unfavorable geology;and at the same time, the initial geological data of the suspicious section of the unfavorable geology is acquired by the infrared detection method and the geological radar detection method, so as todetermine the unfavorable geological section. By adoption of the method, the geological range of the advancing tunnel is gradually reduced and the precision is gradually improved, so as to improve the prediction accuracy of the unfavorable geology.

Description

technical field [0001] The invention relates to the technical field of geotechnical engineering detection, in particular to a method for advanced prediction of poor geological conditions in tunnel construction. Background technique [0002] Tunnel construction has always been a high-tech and difficult construction process, not only due to the difficulty of tunnel excavation and support, but also due to the difficulty of rock mass exploration. At present, advanced geological prediction is based on the tunnel design, in order to ensure the safety of tunnel construction and guide the quality of tunnel engineering, the advanced prediction of adverse geological conditions and construction geological disasters is carried out. At the same time, according to different geographical environments, the methods of advanced geological prediction used in tunnel construction are also different, all of which require on-site construction personnel to conduct a certain degree of exploration in...

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Application Information

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IPC IPC(8): G01V1/00G01V11/00G01V1/20
CPCG01V1/00G01V1/20G01V11/00G01V2200/10
Inventor 王宇
Owner 武汉中科岩土工程有限责任公司
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