公路隧道衬砌混凝土开裂的外水压力原因分析

摘要

When a road tunnel is checked,serious longitudinal cracks are detected in the liner concrete.For the tunnel is embedded in water-rich ground,the external water pressure is considered and analyzed as a main reason to cause the cracks.In this paper,the Fini%在公路隧道检修时,发现衬砌混凝土产生多处纵向裂缝,开裂较为严重。由于该隧道处在地下水丰富的地层中,文章采用三维有限元法、应用渗流应力耦合理论,对可能导致衬砌混凝土开裂的水荷载原因进行分析研究,并从降低渗流荷载引起衬砌拉应力的角度,提出了修补建议。