Abstract：Research purposes: When constructing underground tunnels under complex and changeful geological condition, we must improve the precision of beforehand geological forecast of changeful karst geology and make the construction developed successfully.
Research methods: In the construction of tunnels groups of the function expanding and reconstruction engineering of QIAN-GUI Railway, the prediction and forecast of bad geological body in front of the face was practiced and explored with the application of GPR technology. And the paper researches it according to three key technology problems.
Research results: Combined on-the-spot reality, an opinion on multiple forecast method was put forward, say, improving and optimizing detect methods and techniques, establishing the forecasting and pre-warning system, checking filter difference mutually among multiple forecast analysis and introducing digital image 3D forecast, etc.
Research conclusions; By means of practice examine all the above methods were tested to be effective in improving accuracy and veracity of GPR in detecting forecast and description of bad geological body in karst geology.
舒畅. 提高探地雷达超前地质预报精度的方法研究[J]. 铁道工程学报, 2006, 23(3): 13-16.
SHU Chang. Research on the Method of Improving the Precision of the GPR in Beforehand Geological Forecast. 铁道工程学报, 2006, 23(3): 13-16.
2006, Vol. 23 
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