TSP203Plus超前地质预报技术在贵广铁路客运专线长大隧道施工中的应用技术研究

Research on Techniques of TSP203Plus Applied to the Geological Predication of Long and Large Tunnels in Guiyang-Guangzhou PDL

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。

It is more than 75% super long tunnels and large cross-section tunnels in Guiyang-Guangzhou passenger dedicated lines.The geological disasters which this project may meet are much more serious than ordinary shallow tunnels,for the geological conditions are more unclear and complex.Therefore,it is necessary to make geological predication during the tunnel construction.The basic principle and character of the TSP203plus are described briefly in this paper.Based on the good effects applied to the Guiyang-Guangzhou PDL,it is proved that TSP203plus is reasonable and effective in tunnel geological predication.The paper also analyzes the cause of errors by using TSP203plus,and proposes the measures to improve the predication accuracy so as to guide the adverse geological tunnels to be constructed safely and quickly.