›› 2011, Vol. 32 ›› Issue (4): 1273-1277.

• Testing Technology • Previous Articles     Next Articles

Application of comprehensive survey technique to gas tunnel of highway

WANG Guo-bin1, 2，LI Yi-nian1   

  1. 1. Hubei Communications Planning and Design Institute, Wuhan 430051, China; 2. Faculty of Engineering, China University of Geosciences, Wuhan 430074 China
  • Received:2010-10-08 Online:2011-04-10 Published:2011-04-29

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Abstract:

Locating of gas-bearing structure and dynamic monitoring are two key problems in methane tunnel exploration. As far as methane found in Jijiapo Tunnel in the Three Gorges Dam highway, using geological survey, geological prediction in construction (geophysical prospect and geological drilling), comprehensive gas monitoring and other means of investigation are adopted to analyze gas-bearing structure, study formation cause of gas, and predict gas feature of surrounding rock mass in front of the cutting face and determine dangerous position. It is concluded that gas in this tunnel is characterized by disperse, low density and small volume. The gas flows through fissures and pores in rock mass without tectonic condition for large gas-bearing structure. Comprehensive survey can help to improve predicting accuracy and provide reliable geological support, and can be of great guidance to construction of similar tunnel project.

Key words: tunnel, gas, construction geological prediction, monitoring

CLC Number: 

  • U 456.3+3
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