抗滑桩对偏压隧道洞口稳定性的影响分析

摘要

Taking a tunnel project as an example,FLAC3D software was used to calculate the influence of the anti-slide piles with different spacing on the stability of the tunnel. Research results show that the arch set-tlement of the restricted right line tunnel is obvious by the application of anti-slide pile. With the increase of space between anti-slide piles, the vertical settlement and the maximum vertical settlement of the upper surface of the left and right line tunnel will increase. It is considered that the best anti-slide pile space is 2-4m,and the results of the research have guiding significance for the anti-slide piles construction of the bi-as tunnel.%为研究抗滑桩对偏压隧道稳定性的影响，结合某隧道工程项目，采用FLAC3 D软件，分析了不同间距的抗滑桩对隧道稳定性的影响。分析结果表明：施作抗滑桩对限制右线隧道拱顶沉降作用较明显，随着抗滑桩间距增大，左、右线隧道拱顶上方地表纵向沉降值以及拱顶纵向沉降最大值都将增大；最佳抗滑桩间距为2~4m。分析结果对偏压隧道抗滑桩施工具有指导意义。