顺层岩质边坡隧道破坏模式与防治对策

Failure Modes and Preventive Measures of Tunnel on Consequent Bedding Rock Slope

顺层岩质边坡隧道洞口开挖过程中边仰坡存在滑坡的风险,洞身浅埋偏压段可能因顺层影响承受较大的偏压荷载而破坏,在暴雨、地震或人为工程建设扰动的情况下,更易发生顺层滑移,进而破坏洞门及隧道衬砌结构。隧道洞口及浅埋偏压段是防治重点地段,对顺层岩质边坡隧道破坏模式进行分析,并采用合理的防治对策和针对性设计,可有效预防隧道所在岩质边坡发生顺层滑移,确保边坡的稳定及隧道的施工和运营安全。

There islandslide risk of side uphill slope during tunnel entrance excavation along consequent bedding rock slope,so the shallow- buried eccentric section of the tunnel may be damaged due to the influence of bedding to bear large eccentric load.In the case of heavy rain, earthquake or disturbance of man-made engineering construction, it is more likely to occur bedding sliding, which will damage the tunnel gate and lining structure.Tunnel entrance and shallow- buried eccentric section are the key areas for prevention and control.The analysis on failure mode of tunnel along consequent bedding rock slope, adopt of reasonable prevention and control measures and targeted design can effectively prevent the bedding slide of rock slope where the tunnel is located, and ensure the stability of the slope and the safety of tunnel construction and operation.