市政道路综合管沟的应力分布规律研究  

Study on Stress Distribution Law of Utility Tunnel for Municipal Roads

作　　者：王鹏 黄立夫[2] 谭博 蔡智[2] 

机构地区：[1]中建五局土木工程有限公司,长沙410004 [2]东北大学资源与土木工程学院,沈阳110819

出　　处：《路基工程》2016年第4期91-95,共5页Subgrade Engineering

基　　金：国家自然科学基金(51474050);辽宁省高等学校优秀人才支持计划(2014);中建五局科技创新项目:海相软基处理及市政管廊施工关键技术研究(2014-0-1-0-1148)

摘　　要：以福建省平潭市政道路项目为依托,通过岩土有限差分软件FLAC3D建模,对综合管沟应力分布规律进行了研究。在所建模型中,包含9个关键位置。研究方法为:改变综合管沟上部荷载,监测每个位置各个方向的应力值(横向、竖向、纵向);改变综合管沟埋深,监测其中3个关键位置的竖向应力值。研究结果表明:在综合管沟上端角部3个关键位置存在应力集中现象;估算或监测时,可以只考虑几个关键位置的竖向应力,减少工作量;适当增加管沟埋深,可以减少管沟应力集中现象。Taking the municipal road project in Pingtan, Fujian Province as the background, the paper established a model by finite difference method Flac3D to study the stress distribution law of utility tunnel thereof. In the model established herein, there consists 9 key positions. Then the study was carried out in such manner that, change the upper load of the utility tunnel to monitor the stress in each direction （ lateral, vertical and longitudinal） at each position; and change the buried depth of the utility tunnel to monitor the vertical stress at 3 key positions therein. The study results show that there exists stress concentration at 3 key positions at the upper cornor of utility tunnel; in the course of estimation or monitoring, it is only required to consider the vertical stress at several key positions to lessen the work load; and proper increase of the tunnel depth may reduce the stress concentration on the utility tunnel.

关 键 词：市政道路工程 综合管沟 数值模拟 应力分布 上部荷载 

分 类 号：TU990.3[建筑科学—市政工程]