某高速公路沿线地质调查与灾害评价

Geological Survey and Disaster Assessment along an Expressway

以某新建高速公路项目为例,实地调研了沿线的地形地貌、地质条件和地质灾害情况,分析得出项目区境内主要的地形地貌和控制性工程经过的地质构造带情况,项目区出露的断层主要为马衔山北缘断裂王家圈断层、雾宿山断层,查明了断层明路线范围内发育的断层的具体位置和产状。对经过沿线典型地层的线路进行分段评价得出主要工程地质问题有:黄土湿陷性、冲沟沟坡黄土陷穴对路堑边坡稳定性的影响、断层破碎带对隧道的影响、产状变化对围岩的影响等,并针对以上工程地质问题给出具体的建议,以期为类似工程提供借鉴和参考。

Taking a new expressway project as an example,the field investigation of the terrain and geomorphology,geological conditions and geological disasters along the line was conducted,and the main terrain and geomorphology within the project area and the geological structural belt through which the control project went were analyzed.The exposed faults in the project area were mainly Wangjiaquan fault and Wusushan fault in the northern margin of Maxian Mountain.The specific location and occurrence of the faults developed within the open route of the fault are basically identified.The sectional evaluation of the lines passing through the typical strata along the route shows that the main engineering geological problems include loess collapsibility,the influence of loess caving on the stability of the road cut slope,the influence of the fault fracture zone on the tunnel,the influence of the change of occurrence on the surrounding rock,etc.In order to provide reference for similar projects,some specific suggestions are given for the above engineering geological problems.