客运专线铁路隧道高陡坡洞口开裂整治技术研究

以宝兰客运专线塔稍村隧道为依托,分析隧道进口边坡及洞内裂缝的成因,评价边坡的稳定性,并提出具体的处理措施。对该隧道地层岩性、构造属性、围岩等级等进行阐述,针对该边坡建立系统的地表及洞内变形监测网并进行钻孔内位移测量工作,结合详细的地质调查,查明隧道进口处边坡、洞口挡墙、隧道内二衬裂缝的成因和基本特征,结合区段的工程地质特征,提出合理的工程处理措施,为类似工程的调查与处理提供参考。

Research on Control of Tunnel Entrance Slope Cracks on Dedicated Passenger Railway Line

The article,with reference to Ta Shao-Cun Tunnel on Baoji-Langzhou dedicated passenger line,analyzes the causes of cracks at the tunnel entrance slope and in-tunnel cracks,evaluates slope stability and puts forward some specific measures. The formation lithology,structural properties,and the grades of the surrounding rock are illustrated. The systematic network is established to monitor the deformation on the surface and in the tunnel and the displacement of the borehole. With reference to detailed geological investigation,the causes and basic characteristics of the cracks in the entrance slope,in the portal maintaining wall and in the second lining are identified. In the light of the engineering geological characteristics of the combination section,reasonable engineering treatment measures are put forward,which may serve as references for the investigation and treatment of similar projects.