TGP技术在隧道断层破碎带超前预报中的应用研究

为解决某隧道断层破碎带地层易出现拱顶塌方、掉块、涌水的问题,通过现场掌子面调查结合TGP技术等手段,研究了TGP技术在断层破碎带中的应用情况。结果表明,当反馈数据显示围岩反射界面较密集,纵波速度连续下降时,表明掌子面前方围岩破碎,裂隙水较发育;TGP技术对断层破碎带地层岩性可进行较准确地预测与划分,对于地下水丰富地层隧道应同时配合其他检测手段进行隧道涌水量的预报。

Application of TGP Technology in Advance Geological Prediction of Fault Rupture Zone in Tunnel

In order to solve the problem that the stratum of Battal tunnel fault rupture zone is prone to arch collapse,block dropping and water gushing,the application of TGP technology in the fault rupture zone was studied by means of field investigation and TGP technology.The results show that when the feedback data shows the dense concentration of the reflection interface of surrounding rock and the p-wave velocity decreases continuously,the surrounding rock ahead of the face of the palm is broken and the fracture water is relatively developed.TGP technology can accurately predict and divide strata of fault fracture zone,and the prediction of water inflow should also cooperate with other testing means in abundant groundwater tunnel.