乌鞘岭隧道高地应力软弱围岩大变形控制技术

Control Technology for Large Deformation of Highland Stressed Weak Rock in Wushaoling Tunnel

研究目的:乌鞘岭特长隧道岭脊区段为区域性大断层组成的宽大挤压构造带,围岩破碎软弱,挤压大,变形显著。迫切需要提出切实可行的变形控制技术措施,确保工程安全。研究结果:通过乌鞘岭隧道岭脊地段复杂应力条件下的变形控制技术研究,选择合理的断面形状、预留合理变形量、多重支护、适当提高衬砌刚度的柔性结构设计,短台阶或超短台阶快开挖、快支护、快封闭和衬砌适时施作的施工技术,成功控制了隧道大变形。

Research purposes： The ridge section of Wushaoling tunnel crosses the compressed zone of a regional fault with fracture weak surrounding rock and large compressed deformation, so it is necessary to seek feasible control technology for the purpose of guaranteeing the security of tunnel construction. Research results： Through doing research on control technology for deformation of the ridge section oi Wushaohng tunnel, the relative measures can be taken for successful control of the tunnel deformation in construction, including choice of reasonable cross section shape, remaining deformation amount for the tunnel in advance, multi - supporting, enhancing the rigidity of the flexible lining structure and adopting short benched method with rapid excavation, rapid supporting and timely lining.