新寨隧道富水断层破碎带塌方机理及处治技术研究  

Research on Collapse Mechanism and Treatment Technology of Water-Rich Fault Fracture Zone in Xinzhai Tunnel

作　　者：郭剑 GUO Jian(China Railway 14th Bureau Group Qingdao Engineering Co.Ltd.,Qingdao Shandong 266114,China)

机构地区：[1]中铁十四局集团青岛工程有限公司,山东青岛266114

出　　处：《铁道建筑技术》2024年第1期134-137,共4页Railway Construction Technology

基　　金：山东省2021年第二批技术创新项目(202160800462)。

摘　　要：隧道过断层破碎带施工过程中围岩易发生坍塌、涌水突泥等事故,给隧道施工带来了相当大的挑战。以新寨隧道穿越富水断层破碎带过程中坍塌、涌水、衬砌变形破坏为工程背景,基于现场勘测和隧道变形破坏机理分析,得出了隧道围岩承载力低、岩体破碎、衬砌支护不合理和丰富的地下水是导致隧道发生变形破坏的主要因素;为减少断层破碎带的不利影响,从隧道崩塌体处理、超前支护、衬砌加固、施工方法调整等方面提出了一系列综合治理措施;通过现场监测数据,验证了采取措施的有效性。研究结果可对同类工程具有一定的借鉴意义。During the construction of the tunnel over the fault fracture zone,the surrounding rock is prone to collapse,water and mud surges and other accidents,which brings considerable challenges to the tunnel construction.This paper takes the collapse,water surge and lining deformation damage in the process of Xinzhai Tunnel crossing the water-rich fault fracture zone as the engineering background,based on the field survey and analysis of tunnel deformation damage mechanism,it is concluded that the low bearing capacity of the tunnel surrounding rock,rock fragmentation,irrational lining support and abundant groundwater are the main factors leading to the deformation damage of the tunnel;in order to reduce the adverse effects of the fault fracture zone,a series of comprehensive management measures are proposed in terms of the treatment of the tunnel collapsing body,advance support,lining reinforcement and adjustment of construction methods;the effectiveness of the measures is verified through the on-site monitoring data.The results of the study can be of some reference significance to similar projects.

关 键 词：富水断层破碎带 坍塌 涌水 衬砌变形 综合治理 

分 类 号：U455.4[建筑科学—桥梁与隧道工程]