瞬时强降雨对施工中铁路岩溶隧道衬砌强度的影响与应对措施研究

Research on the Influence and Corresponding Measures of Instantaneous Heavy Rainfall on the Lining Strength of Railway Karst Tunnel during Construction

为提高瞬时强降雨对施工中铁路岩溶隧道衬砌强度影响的分析效果,提出了一种分析方法。首先利用雨水入渗原理模拟分析强降雨对施工中铁路岩溶隧道衬砌强度的影响,再进行试验验证。在设定的试验环境和试验装置下,通过ABAQUS软件建立渗流—应力耦合模型模拟数值,并对其进行计算分析。结果表明,设计的方法能够准确分析出不同情况下隧道衬砌的位移情况,最高准确度为1,可满足瞬时强降雨对施工中铁路岩溶隧道衬砌强度影响分析的需求。

In order to improve the analytical effect of instantaneous heavy rainfall on the lining strength of railway karst tunnels during construction,an analysis method is proposed.Firstly,the principle of rainfall infiltration is used to simulate and analyze the influence of heavy rainfall on the lining strength of railway karst tunnels during construction,and then experimental verification is conducted.In the given test condition,establish a seepage stress coupling model using ABAQUS software,then make calculations and analyses.The results indicate that the designed method can accurately analyze the displacement of tunnel lining under different conditions,with a maximum accuracy of 1,which can meet the requirement of analyzing the influence of instantaneous heavy rainfall on the strength of railway karst tunnel lining during construction.