摘要
综合道路管廊是一个城市中集中铺设油气管道,光纤通信等基础设施的公共交通枢纽。管廊整体结构较长,穿越不同地质情况时很容易发生沉降差异,进而产生结构裂缝乃至彻底破坏。针对不同土质下道路管廊易出现不均匀沉降这一工程问题,依托益阳管廊项目,借助FLAC^(3D)模拟软件建立有限元模型,探究了土体换填后管廊顶部管壁采用预应力锚索加固对沉降产生的作用。研究结果表明:在土体换填后,管廊顶部管壁采用预应力锚索加固可以有效地控制管廊沉降,随着对锚索施加预应力的增大,管廊周围土体沉降逐步减小。当锚索预应力达到一定阈值后,沉降量趋于稳定。在管廊中打入预应力锚索后,主要改变管廊周围的土体沉降,远处路基底部土体沉降略有增大。研究成果可供工程上综合道路管廊结构设计借鉴。
Road comprehensive pipe gallery is a kind of road comprehensive pipe gallery which is usuallyconstructed together with urban roads.The structure of it is long,when the pipe gallery passes throughdifferent geological conditions,it is easy to occur settlement difference,which will lead to structuralcracks and even complete destruction.Aiming at the problem that road pipe gallery is prone to unevensettlement under different soil materials,according to Yiyang pipe gallery project,the finite element modelwas established by using FLAC^(3D) to explore the influence of prestressed anchor cable reinforcement on thesettlement of pipe gallery top wall after soil filling.The experimental results show that the settlement of pipegallery can be effectively controlled by using prestressed anchor cable to reinforce the top wall of pipe galleryafter the soil is replaced.When the anchor cable prestress reaches a certain threshold,the settlement tends tobe stable.The soil settlement around the pipe gallery is mainly changed after the prestressed anchor cable isput into the pipe gallery.The settlement at both ends of the subgrade increases slightly.The research resultscan be used for reference in the structural design of integrated road pipe gallery.
作者
张卓航
ZHANG Zhuohang(School of Resources and Civil Engineering,Northeastern University,Shenyang,Liaoning Province,110819 China)
出处
《科技创新导报》
2021年第1期7-14,77,共9页
Science and Technology Innovation Herald
基金
中央高校基本科研业务专项基金资助(项目编号:N17010829)
中建股份科技研发课题(项目编号:CSCEC-2016-Z-20-8)。
