关键词: 人工地震反射法, TSP203系统, 隧道, 预报精度

Abstract: Advanced Prediction is one of the most effective methods to assure the safety in tunneling.The histories and case experiences show that the TSP203(Tunnel Seismic Prediction203)combined with other techniques can meet the requirements of advanced prediction in tunneling and the prediction implementation costs.This paper firstly introduces the principle of the TSP203,and then compares the prediction result with the excavated conditions of the Dayaoshan railway tunnel.As an example,we introduce the prediction method,explain how to use TSP203 in complicated geological conditions.and analyze the main reason about predication errors according to several years'operation experiences in site as well as seismic theory.The method of TSP203 is a kind of mature technology,it is suitable for planar faults with large intersection angle to the axis of tunnel,but not fit for small intersection angle.However because the karsts terrain has the character of complexity,changeability and uncertainty,the predicting accuracy is a little lower in this kind of place.In addition,groundwater prediction is a technological problem in construction of tunnel that has not been solved both at home and abroad.TSP prediction accuracy is also related with operator's practice levels.Finally,some suggestions are given about how to improve data acquisition accuracy and reliability of explaining the reflected objects.Some important items in predication using TSP203 are summarized.

Key words: reflection seismic method, TSP203 system, tunnel, prediction accuracy