灌砂基础沉管隧道管段三维静力分析  

Analysis on Three-dimensional Static of Immersed Tunnel Pipe Section of Sand Filling Foundation

作　　者：杨旭东 左伟[2] 李超浩 赵俊 YANG Xudong;ZUO Wei;LI Chaohao;ZHAO Jun(China Railway Tunnel Group Three Co.,Ltd.Guangzhou 510080,China;Anhui Jianzhu University Hefei 230601,China)

机构地区：[1]中铁隧道集团三处有限公司,广州510080 [2]安徽建筑大学,合肥230601

出　　处：《广东土木与建筑》2023年第8期66-69,共4页Guangdong Architecture Civil Engineering

基　　金：中铁隧道科研项目“近海内河沉管隧道大纵管节起浮和沉放安全性控制关键技术研究”(HYB20190156)

摘　　要：沉管隧道多用于解决城市穿过江河的通道工程,是建在水底之下供人员和车辆通行的水下建筑物。以广州市某沉管隧道工程为实例,基于ANSYS有限元软件对灌砂基础的沉管隧道管段进行三维静力分析,根据实际数据进行三维建模、网格划分、施加荷载和边界条件约束,求解获得管段的应力、应变和管段总变形图。结果表明:沉管隧道底板灌砂孔位置出现应力集中现象,最大变形出现在管节接头连接键的位置,基于有限元的分析结果可以为管段结构强度和刚度设计提供一定的参考。Submerged tube tunnel is mostly used to solve the city through the river channel project,is built under the water for people and vehicles to pass the underwater structure.Takes a immersed pipe tunnel project in Guangzhou City as an example,carries out three-di‐mensional static analysis on the immersed pipe section of sand grouting foundation based on ANSYS finite element software,carries out three-dimensional modeling,grid division,imposes load and boundary condition constraints according to the actual data,and obtains the stress,strain and total deformation diagram of the pipe section.The result shows that stress concentration occurs at the location of sand fill‐ing holes in the bottom plate,and the maximum deformation occurs at the location of pipe joint joint.The finite element analysis results can provide a certain reference for the structural strength and stiffness design of pipe segment.

关 键 词：沉管隧道 数值模拟 三维模型 灌砂基础 

分 类 号：U455.46[建筑科学—桥梁与隧道工程]