【摘要】 根据在浙江苍岭隧道施工中发生在凝灰岩中的突水事故,通过现场地质观测资料,具体地分析了其形成的规模、位置、诱发因素以及地质条件,从地质工程的角度,对突水发生地段隧道的岩石组成、地质构造、现代构造应力场以及地下水等工程地质特征进行了探讨,发现在苍岭隧道施工中发生的突水事故受到地质构造和地下水活动特点的强烈控制,虽然凝灰岩本身不溶于水,但在现代构造应力场的作用下形成的特殊构造,为地下水的运移和赋存提供了通道和场所,是造成突水的主要原因。并在此基础上,借助TSP-203+地质超前预报系统,建立了苍岭隧道突水灾害的超前预报识别标志,提出了“地质预报结合强排、注浆加固围岩”的突水防治措施。更多还原

【Abstract】 Depending on the data summarized with geological investigation during tunneling,in this paper the geological characters of water bursting in Cangling tunnel was studied.Also,the water bursting characters including scale,position and geological condition were analysed.In this paper,the main control factors of the water bursting which consist of rock-form,geological structure,terra-stress and groundwater have been discussed from the view point of geological engineering.Finally,on the one hand,this paper has indicated the identified earmarks of the water bursting happening in Cangling tunnel and points out that the main passage and the location of ground-water are offered by tuff;on the other hand,this paper has presented the prevention methods in accordance with geological qualification in the Cangling tunnel.更多还原