摘要
随着我国城市化进程快速推进,城市间人流量逐步增多。为解决城市间交通问题,目前我国正大力建设高铁。桥隧串接型洞门作为洞门一种结构形式,其工序复杂,施工难度大,对其进行研究意义重大。本工程串接明洞施工采用整体式模板台车分两次浇筑,浇筑长度根据变形缝位置划分为2.5、10 m。浇筑后10 m时,台车部分支撑于原地面以上,部分支撑在钢管立柱上。为保证施工过程结构体系安全性,采用地层-结构分析法,按施工活荷载最不利布置原则,利用ABAQUS有限元软件对串接明洞施工进行三维有限元分析,系统评估结构体系强度、变形以及稳定性。根据现场实际对临时支架进行设计与计算,并总结形成一套确保串接洞门施工质量的工艺与技术经验。
With the rapid progress of urbanization in China,the flow of people between cities has gradually increased.In order to solve the traffic problems between cities,China is currently vigorously building high-speed railway.As a form of tunnel portal,bridge and tunnel series portal has complex process and great construction difficulty,so its research is particularly important.The construction of the series open cut tunnel adopts the integral formwork trolley for pouring in two times.The pouring length is divided according to the location of the deformation joint,and the pouring length is 2.5 m and 10 m respectively.At 10 m after pouring,the trolley is partially supported above the original ground and partially supported on the steel pipe column.In order to ensure the safety of the structural system during the construction process,the stratum-structure method is adopted,and the three-dimensional finite element analysis is carried out for the construction of the series open cut tunnel using ABAQUS finite element software according to the principle of the most unfavorable arrangement of the construction live load,so as to systematically evaluate the strength,deformation and stability of the structural system.According to the actual situation of the site,the temporary support is designed and calculated,and a set of process and technical experience to ensure the construction quality of the portal in series is summarized.
作者
梁龙
LIANG Long(China Railway 14^(th) Bureau Group No.4 Engineering Co.Ltd.,Jinan Shandong 250002,China)
出处
《铁道建筑技术》
2023年第4期151-154,共4页
Railway Construction Technology
基金
山东省技术创新项目(202250101276)。
关键词
桥隧串接
地层-结构法
结构稳定性
有限元分析
bridge and tunnel series connection
stratum-structure method
structural stability
finite element analysis
