隧道下穿施工引起公路路面沉降分析  

Analysis of road surface settlement caused by tunnel under crossing highway

作　　者：易富[1] 孙迪[1] 赵琪琪[1] 张旖旎[1] 

机构地区：[1]辽宁工程技术大学土木与交通学院,辽宁阜新123000

出　　处：《辽宁工程技术大学学报（自然科学版）》2016年第7期722-726,共5页Journal of Liaoning Technical University (Natural Science)

摘　　要：以沥青路面平整度为控制指标,分析隧道不同埋深、不同开挖半径下穿某一施工段对公路路面的沉降影响,通过有限元软件Midas-GTS对隧道下穿施工进行数值模拟,对公路路面的沉降进行分析.结果表明:隧道施工引起的路面沉降受隧道半径和埋深的控制.沉降槽宽度系数与隧道半径和埋深具有明显的线性关系,控制隧道半径,得出路面允许最大沉降与隧道埋深的关系,合理预测最大沉降,理论结果可为类似工程提供参考.Asphalt pavement smoothness is regarded as the control index in order to analyze the settlement influence of tunnel-crossing on highway pavement under different buried depth and excavation radius conditions. Numerical simulation of the tunnel under crossing is conducted to analyze the settlement of highway pavement by means of the finite element software Midas-GTS. The results show that the road surface subsidence caused by tunnel construction is controlled by tunnel radius and depth. The width coefficient of settling tank has obvious linear relation with tunnel radius and depth, control radius, and the correlation of allowable maximum settlement of the road and buried depth is acquired so as to predict maximum subsidence reasonably. The theoretical results can provide reference for similar projects.

关 键 词：隧道施工 平整度 路面沉降 近接施工 正交下穿 变形预测 

分 类 号：U455[建筑科学—桥梁与隧道工程]