铁道标准设计2017，Vol.61Issue(12)：34-40,7.DOI:10.13238/j.issn.1004-2954.2017.12.008
钢轨-弹性支承块式道床-隧道底板相互作用数值模拟
Numerical Simulation of Interaction among Rail, LVT Track Bed and Tunnel Floor
摘要
Abstract
In order to study the interaction between track and tunnel structures,a finite element model is established to analyze the interaction between LVT track and tunnel floor.Taken into account are the following influence factors:the deformation mode,the maximum deformation of tunnel floor and the width of settlement trough.The deformation and internal forces of track,the detachment between rail and track bed,the detachment between track bed and tunnel floor are calculated.The results show that,due to weak connection among supporting block,track bed and tunnel floor,the uneven settlement of tunnel floor may cause the detachment among rail,track bed and tunnel floor;the insufficient constraint effect of rail to the track bed and the deformation difference between track bed and tunnel floor are mainly caused by the rigidity of track bed;rail is more likely to detach from track bed as the maximum deformation of track bed occurs at the deformation joint than in the middle of track bed;with the increase of the width of settlement trough,the deformation difference between track and tunnel gets smaller,but the internal force of track structure tends to increase first and then decrease.The calculation with in-situ data shows 0.8 mm detachment between track bed and tunnel floor,which is consistent with the measured 1.1 mm.关键词
地铁隧道/穿越施工/相互作用/数值模拟/弹性支承块式道床/轨道/脱空Key words
Subway tunnel/Traversing construction/Interaction/Numerical simulation/LVT track bed/Track/Detachment分类
交通工程引用本文复制引用
程霖,杨成永,石勇军,马文辉..钢轨-弹性支承块式道床-隧道底板相互作用数值模拟[J].铁道标准设计,2017,61(12):34-40,7.基金项目
国家自然科学基金项目(51478032) （51478032）
