浅埋隧道穿越软弱破碎围岩变形控制研究

Study on Deformation Control of Shallow Tunnel Passing through Soft and Broken Surrounding Rock

浅埋隧道穿越软弱破碎围岩时,施工风险极高。软弱破碎岩体物理力学指标降低,自稳能力差,隧道可能会产生较大的变形,甚至塌方。如果不能采取有效的处理措施,将会延长施工工期,甚至会造成安全事故,大大的增加施工成本。文章结合实际浅埋隧道工程,在隧道穿越软弱破碎,采取了有效的控制措施,并结合数值分析模拟计算了围岩的变形量,保证了隧道施工的安全,为类似工程提供指导和借鉴。

When the shallow tunnel passes through the soft and broken surrounding rock,the construction risk is very high.The physical and mechanical indexes of weak and broken rock mass are reduced,the self stability is poor,and the tunnel may produce large deformation or even collapse.If effective treatment measures are not taken,the construction period will be prolonged,even safety accidents will be caused,and the construction cost will be greatly increased.Combined with the actual shallow tunnel project,the paper takes effective control measures when the tunnel passes through the soft fracture,and calculates the deformation of surrounding rock by numerical analysis and simulation,which ensures the safety of tunnel construction and provides guidance and reference for similar projects.