摘要
随着我国现代城市不断发展,部分城市供水管道周边服役环境较设计初期改变较大,主要包括新建建筑、道路等新增荷载和靠近施工基坑等侧向约束削弱。基于江苏某大直径给水管道工程,使用ABAQUS软件开展管线在堆载作用和基坑开挖影响下的受力变形数值模拟研究,分析了在不同现场条件下管线应力、水平位移、竖向位移的变化规律,将计算结果与现行规范对比来确定安全范围,以期为类似工程提供一定的参考经验。模拟结果表明:埋深为1倍管径的管道,地表荷载大小为150 kPa时,管道应力超过了规范要求的安全值;基坑在开挖至10 m时,管道的竖向最大变形值为3.75 mm,满足规范允许变形值5 mm。
With the continuous development of urbanization in China,the surrounding service environment of water supply pipelines in some cities has undergone significant changes compared to the initial design,mainly including new loads such as new buildings and roads,and weakened lateral constraints near construction sites.Therefore,this article presents the case history of a large diameter water supply pipeline project in Jiangsu.The ABAQUS software is used to conduct a numerical simulation investigation on the stress deformation of pipelines under the influence of pile loading and deep excavation.The changes in pipeline stress,horizontal displacement,and vertical displacement under different on-site conditions are investigated.The numerical analysis results are compared with the current specifications to determine the safety range.The simulation results show that when the embedment depth of a pipeline is at the depth equivalent to the pipe diameter,and the surface load is 150 kPa,the pipeline stress exceeds the safety value required by the specification.When soil is excavated to 1Om,the maximum vertical deformation value of the pipeline is 3.75 mm,which meets the allowable deformation value of 5mm in the specification.
作者
张炜
笪跃武
高广银
胡侃
张晓磊
陈航
胡淑圆
ZHANG Wei;DA Yuewu;GAO Guangyin;HU Kan;ZHANG Xiaolei;CHEN Hang;HU Shuyuan(Wuxi Water Group Co.Ltd.,Wuxi 214031;Tongji University,Shanghai 200000)
出处
《土工基础》
2026年第1期43-46,59,共5页
Soil Engineering and Foundation
关键词
堆载效应
管线安全
数值模拟
安全性评价
Surcharge Effect
Pipeline Safety
Numerical Simulation
Safety Evaluation
