摘要
为更详细地掌握钢筋混凝土矩形市政工作井的实际受力状况,评价现行计算方法的准确性,为其预制拼装化提供依据,以实际市政道路电力检修工作井为例,采用ABAQUS软件建立其精细化三维有限元模型;考虑地基土力学参数、土基开挖—混凝土浇筑—回填的施工过程和路面结构及其参数的情况下,分析了工作井在汽车移动荷载、土压力、水压力共同作用下的实际受力状况。仿真分析结果表明:正常服役期间,井体弯矩随覆土厚度的增大而增大,混凝土应力水平基本处于弹性范围;地下水对井体内力有一定影响,设计时应适当考虑;按现行方法设计的工作井承载力富余较多;接缝构造是工作井预制拼装化的关键问题。
In order to understand the actual stress of reinforced concrete rectangular municipal working well, evaluate the accuracy of current calculate method, provide a basis for its prefabrication and assembly, taking a local actual electrical working well as an example, a fine 3 D finite element model is built by ABAQUS software. Considering mechanical properties of foundation soil, construction progress of pit excavation-concrete cast-soil backfilling,pavement structures and parameters, the actual stress condition of the working well under driving load, soil pressure and groundwater pressure were analyzed. The analysis results show that during the normal service period, the bending moment of the well increases with increase of the thickness of the covering soil. The stress level is still within the materials’ elastic range;Groundwater should be considered in design because it has an influence on the internalforce of the well. The wells’ bearing capacity is still surplus according to current design method;Seam structure is key problem of prefabricated and assembly working well.
作者
郑宏宇
刘素梅
朱喆
瞿升任
江怀雁
Zheng Hongyu;Liu Sumei;Zhu Zhe;Qu Shengren;Jiang Huaiyan(Key Laboratory of Disaster Prevention and Structural Safety of Ministry of Education,School of Civil Engineering and Architecture,Guangxi University,Nanning 530004,China;School of Architectural Engineering,Jinling Institute of Technology,Nanjing 211169,China;Guangxi Power Grid Nanning Power Supply Bureau,Nanning 530023,China;Guangxi Jianning Power Transmission and Transformation Engineering Co.,Ltd.,Nanning 530031,China;School of Civil Engineering,Guangxi Polytechnic of Construction,Nanning 530007,China)
出处
《市政技术》
2022年第1期7-12,共6页
Journal of Municipal Technology
基金
2017年度广西高校中青年教师基础能力提升项目《预制预应力拼装技术在浅埋箱式混凝土结构中的应用研究》(2017KY1117)
广西防灾减灾与工程安全重点实验室系统性研究项目《预制装配式混凝土空心板浅埋地下结构在车-土-水耦合长期作用下的破坏机理及计算理论研究》(2013ZDX07)
广西大学科研基金项目《预制装配式电缆工作井的关键技术研究》(XJZ120268)。
关键词
市政工作井
钢筋混凝土
箱式结构
汽车
地下水
覆土厚度
三维有限元
municipal working well
reinforced concrete
box structure
vehicle
groundwater
overburden thickness depth
3D finite element
作者简介
郑宏宇,男,副教授,博士,主要从事预制装配式混凝土结构、纤维复合材料增强混凝土结构、组合结构研究工作;通讯作者:江怀雁,女,教授,高级工程师,硕士,主要从事混凝土结构设计研究工作;刘素梅,女,讲师,博士,主要从事钢-混凝土组合结构研究工作;朱喆,男,高级工程师,硕士,主要从事电网基建项目管理工作;瞿升任,男,工程师,学士,主要从事电网基建项目管理工作。
