摘要
随着我国高速公路隧道建设事业的迅速发展,越来越来的隧道开挖需要面临泥砂岩互层围岩蠕变变形过大的安全问题。基于贵州省望安高速公路河边隧道的工程概况,采用ABAQUS有限元分析软件,建立了泥砂岩互层隧道围岩蠕变计算模型,得到了围岩蠕变30 d后的水平位移和竖向位移分布云图,给出了监测点水平位移和竖向位移随时间的变化曲线,分析了泥砂岩互层隧道围岩蠕变过程中水平位移和竖向位移的分布规律。计算结果表明,泥砂岩互层隧道围岩蠕变过程中拱顶沉降随时间增加的程度最显著,且预留变形量由拱顶沉降控制。
With the rapid development of the tunnel construction of the highway in China,more and more tunnel excavation needs to face the safety problem of excessive creep deformation of the mudstone interbedded surrounding rocks.Based on the engineering conditions of the He-bian tunnel of the Wang-an highway in Gui-zhou province,the creep calculation model of the surrounding rocks of the mudstone interbed tunnel is established by using the ABAQUS finite element analysis software.The distribution clouds of the horizontal and vertical displacements of the surrounding rock creep after 30 days are obtained,and the horizontal and vertical displacement curves of the monitoring point are given.The distribution law of the horizontal and vertical displacements in the creep process of siltstone interbedded tunnels are analyzed.The calculation results show that the degree of the vault settlement increases with time is the most significant during the creep process of the surrounding rock of the mudstone interbedded tunnel,and the reserved deformation value is controlled by the vault settlement.
作者
罗志文
LUO Zhiwen(Hunan Longlang Expressway Construction and Development Co.,Ltd.,Loudi,Hunan 417000,China)
出处
《公路工程》
北大核心
2018年第5期280-283,共4页
Highway Engineering
