Abstract: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.