摘要
作为顶管工程最为重要的构筑物之一,顶管始发井或接收井需要在井壁上开设尺寸不一的圆形洞口供顶管进出,洞口的设置影响了井体结构受力。以有限元软件为分析工具,依托西安市某DN3500内径电力顶管工程,研究采用明挖顺作法施工的井壁开洞对井体结构的受力影响规律,将之与同等条件下的沉井结构内力计算结果进行对比,得出了不同工艺井侧壁开洞前后的内力变化规律,并提出了相应的井结构优化设计建议,为相关工程的设计与分析提供参考。
The launching shaft or the receiving shaft are the most critical structures in the pipe jacking project,and circular holes of different sizes are needed on the shaft wall for the pipes to enter and exit.The setting of the holes affects the stress of the shaft structure.Relying on a DN3500 inner diameter electrical power pipe jacking project in Xi'an,the influence law of the shaft wall opening constructed by the open excavation method on the shaft structure was studied using the finite element method.The results were compared with the open caisson under the same conditions.The internal force calculation results of the design are compared,and the internal force variation law before and after the open excavation of the shaft with different methods was obtained.The corresponding structure optimization design suggestions are put forward and provide reference for the design and analysis of related projects.
作者
海涵
何伟
詹源
陈孝湘
龚建伍
Hai Han;He Wei;Zhan Yuan;Chen Xiaoxiang;Gong Jianwu(State Grid Shaanxi Electric Power Co.,Ltd.Construction Branch,Xi’an 710065,Shaanxi,China;Shaanxi Electric Power Design Institute Co.,Ltd.of CEEC,Xi'an 710054,Shaanxi,China;PowerChina Fujian Electric Power Survey&Design Institute Co.,Ltd.,Fuzhou 350003,Fujian,China;School of Urban Construction,Wuhan University of Science and Technology,Wuhan 430081,Hubei,China)
出处
《岩土工程技术》
2023年第2期174-180,共7页
Geotechnical Engineering Technique
基金
国网陕西省电力有限公司科技项目(电缆工井涉及河道防护措施研究)。
关键词
大直径顶管
始发井
预留洞口
结构受力
有限元
pipe jacking with large diameter
launching shaft
the reserved hole
structure stress
finite element method
