重载作用下脱空对隧道复合式路面竖向位移和最大剪应力的影响  

Influence of Heavy Load and Interlayer Void on the Vertical Displacement and Maximum Shear Stress of Compound Pavement of Extra-long Tunnel

作　　者：黄剑 HUANG Jian(Guangdong Nanyue Transportation Investment&Construction Co.,Ltd.,Guangzhou 510199,China)

机构地区：[1]广东省南粤交通投资建设有限公司,广州510199

出　　处：《科技和产业》2024年第19期314-318,共5页Science Technology and Industry

摘　　要：为了研究层间脱空对隧道复合式路面竖向位移和最大剪应力的影响,考虑重载的作用,采用ABAQUS建立复合式隧道路面模型,分析脱空区域大小对竖向位移和最大剪应力的影响。结果表明:脱空区域对复合式隧道路面的竖向位移、两车轮中心位移差和最大剪应力的影响显著;随着脱空区域的增大,竖向位移先急剧增大随后增长速率放缓,两车轮荷载中心位移差先增大后减小;当脱空区域面积大于0.0225 m 2时,最大剪应力最大值从下面层顶移动至下面层底部脱空区域;随着轴重的增加,脱空区域一侧车轮中心路表位移、两车轮中心路表位移差、最大剪应力最大值均增大。In order to study the effect of voids on the vertical displacement and maximum shear stress of the tunnel composite pavement,considering the effect of heavy load,ABAQUS was used to establish a composite tunnel pavement model,and the size of the void area on the vertical displacement and maximum shear stress was analyzed.The results show that the void area has a significant effect on the vertical displacement of the composite tunnel pavement,the difference between the center displacements of the two wheels and the maximum shear stress.As the void area increases,the vertical displacement first increases sharply and then the growth rate slows down.The displacement difference between the load centers of the two wheels increases firstly and then decreases.When the area of the void area is greater than 0.0225 m2,the maximum shear stress moves from the top of the lower layer to the void area at the bottom of the lower layer.As the axle load increases,the void area becomes one displacement of the center road surface of the side wheel,the displacement difference of the center road surface of the two wheels,and the maximum value of the maximum shear stress increased.

关 键 词：复合式路面 脱空 有限元 重载 

分 类 号：U416.2[交通运输工程—道路与铁道工程]