摘要
病害会影响隧道结构的承载能力。对于沉管隧道,受潮汐作用和冲刷作用影响,其覆盖层厚度不一,长此以往易产生环向裂缝。文章从安全系数入手,采用有限元数值模拟的方式,分析了沉管隧道覆盖和裂缝病害对隧道结构承载能力的影响。以实际工程为依托,探究沉管隧道安全系数的变化情况,为沉管隧道的养护维修工作提理论支持,具有指导意义。
The disease will affect the bearing capacity of tunnel structure. For immersed tunnel, due to the influence of tide and scour, the thickness of its overburden varies, which is easy to produce annular cracks in the long run.In this paper, starts with the safety factor and adopts the finite element numerical simulation method to analyze the influence of the tunnel cover and crack on the bearing capacity of the tunnel structure. Based on the actual project, the variation of the safety coefficient of immersed tunnel is explored.This provides theoretical support for the maintenance of immersed tunnel and has guiding significance.
引文
[1]傅琼阁.沉管隧道的发展与展望[J].中国港湾建设,2004(5):53-58.
[2]万晓燕,管敏鑫,唐英.沉管隧道段的结构计算与分析[J].世界隧道,1999(3):19-22.
[3]薛勇.沉管隧道的稳定和防护措施[J].特种结构,2005(4):88-89.