断层及其破碎带隧道信息化施工

断层及其破碎带是隧道开挖支护施工中难度很大、容易出现事故的地段。结合甘肃省兰临高速公路新七道梁隧道的实例，根据其地质特征，加强基础资料收集。采用地面地质调查、波速测试、隧道内掌子面和侧壁地质素描及超前钻孔等方法手段。通过数据分析处理。对其中F4断层基本地质特征进行了预报，如断层岩性、规模、位置的长期超前地质预报和精度较高的短期超前地质预报。同时，对施工中收敛变形、拱顶下沉和围岩压力等测量数据进行了曲线分析，动态反馈于施工过程中，此即断层及其破碎带隧道信息化施工。该方法在隧道穿越F4断层施工指导中取得了令人满意的结果。

INFORMATION CONSTRUCTION OF THE TUNNEL IN A FAULT AND CRUSH ZONE

The fault and crush zone is the very difficult and catastrophic sector of the tunnel during the course of excavation and support. The fundamental data collection is emphasized in the case of Xinqidaoliang tunnel with regarding to the geological condition. By means of geological survey of ground surface along the tunnel,measurement of wave velocity,and geologic sketching of both tunnel face and walls within the tunnel,the long-term geology prediction which forecasts basic geological conditions,such as lithology,scope,location,of Fault 4,and the short-term geology prediction are conducted. At the same time,the analysis results of measured data such as convergence,subsidence of crown,and pressure of surrounding rock are dynamically fed back to the construction. These processes are called the information construction of the tunnel in a fault and crush zone,which is applied to the tunneling through Fault 4 and gives a satisfying effect.