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贵广铁路线路中特大长隧道、特大断面的隧道所占比例达到75%以上,隧道穿越某些地质情况复杂地区,可能遇到的工程地质问题及地质灾害较一般浅埋隧道更多、更严重。因此,在隧道施工中开展超前地质预报工作非常有必要。TSP203plus的工作原理和系统工作特点能满足工程预报需要。在贵广铁路部分隧道超前地质预报中证实了TSP203plus作为一种隧道地质预报手段的合理性和有效性。在对TSP203plus超前地质预报产生的误差原因进行分析的同时,提出了提高预报精度对策,从而指导不良地质条件下的隧道安全快速施工。
More than 75% of tunnels with extra-long tunnels and extra-large sections in the Gui-Guang Railroad lines are over 75%. The tunnels traversing some complicated geological conditions may encounter more and more serious geological problems and geological disasters than the general shallow tunnels . Therefore, it is very necessary to carry out advanced geological forecasting in tunnel construction. TSP203plus working principle and system features to meet the engineering forecast needs. The geological prediction of TSP203plus as a kind of tunnel geological forecasting method is proved to be reasonable and effective in the advanced geological prediction of some tunnels on the Gui-Guang Railway. While analyzing the cause of error caused by TSP203plus advanced geological forecasting, this paper puts forward some countermeasures to improve the forecasting accuracy so as to guide the tunnel construction under adverse geological conditions.