明挖隧道已建主体结构侧墙支撑效应分析  

Analysis on the Side Wall Support Effect of the Main Structure of the Open-cut Tunnel

作　　者：李文斌 王麒[1] LI Wen-bin;WANG Qi(CCCC Highway Consultants Co.Ltd.,Beijing 100010,China)

机构地区：[1]中交公路规划设计院有限公司,北京市100010

出　　处：《公路》2022年第11期12-17,共6页Highway

摘　　要：以厦门第二东通道枋钟路隧道明挖基坑为例,在拆撑工况中,考虑已建主体结构悬臂侧墙与支护结构共同承担拆撑荷载,以研究取消换撑的可能性。通过理正深基坑软件及ROBOT软件同时计算分析,结果显示:取消换撑方案既满足悬臂侧墙的受力要求,也满足支护结构变形及内力要求。Taking the open-cut foundation pit of Fangzhong Road tunnel, the Xiamen Second East Passageway as an example, the possibility of canceling the support replacement is studied by considering that the cantilever side wall of the existing main structure and the supporting structure shared the load jointly under support removal condition. Based on the simultaneous calculation and analysis by Lizheng deep foundation pit software and ROBOT software, the results show that the cancellation of support can not only satisfy the stress requirements of cantilever side wall, but also meet the deformation and internal force requirements of supporting structure.

关 键 词：明挖隧道 基坑开挖 拆撑工况 计算分析 

分 类 号：U455.45[建筑科学—桥梁与隧道工程]