Applicable Study of Geophysical Exploration Technology for Karst under Tunnel on Yichang-W anzhou Railway
CUIDe-Hai1, YANG Q ing-bo2
1. China Railway Siyuan Survey and Design Group Co. Ltd, Wuhan, Hubei 430002, China; 2. The 5th Affiliated Company, ChinaRailway 16th Bureau Group Co. Ltd, Tangshan, Hebei064000, China
Abstract：Research purposes:This paper gives an introduction to the application of integrated geophysical exploration technology (single-receiver seismic and ground penetrating radar) for the karst under tunnel on Yichang-Wanzhou Railway, analyzes the characteristics ofprofitsignaland noise derived from artificial field in the tunne,l and studieshow to improve the signal-to-noise ratio by data acquisition and processing forbetter survey.
Research conclusions:The study shows the seismic method along with electromagnetic method is the most effective method for exploration of the karstunder railway tunnelbecause these twomethods canwell compensate each other, the efficiency of artificial seismic source system is the key point for applying single-receiver seismic method, and the ground penetrating radar has the high resolving capability to the big-scale karsts by the data process appropriately, even under condition of the severe electromagnetic interference.
2009, Vol. 26 
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