%0 Journal Article
%T 临江下立交匝道偏压基坑开挖方案优化<br>The excavation scheme optimization of beside river interchange ramp unsymmetrical loaded foundation pit
%A 王海龙
%A 方焘
%A 余小强
%A 曹煌煌
%A 郭俊&lt
%A br&gt
%A WANG Hailong
%A FANG Tao
%A YU Xiaoqiang
%A CAO Huanghuang
%A GUO Jun
%J 铁道科学与工程学报
%D 2016
%X 南昌红谷隧道东岸匝道采用明挖法施工,其中C和S匝道空间立交,岸上下高差显著,基坑围护结构局部处于悬臂偏压状,开挖风险大。针对此问题,利用大型有限元软件ABAQUS建立全仿真模型,对不同开挖方案进行对比研究。结果表明:先开挖岸上C和S匝道至与岸下齐平,再同时开挖岸上和岸下基坑,围护结构变形最小,基坑安全度最大。现场监测表明,围护结构变形和受力已趋于稳定且均在可控范围。优化方案保证了基坑开挖安全,可供类似工程借鉴。<br>East ramp of Nanchang hong-gu tunnel is constructed by using open excavation method, which the ramp C and the ramp S are interchanged in the space. This tunnel is in high-risk condition, because there are significant height differences between foundation pit on the ashore and under the ashore, and the local position of the retaining structure is in the cantilever bias. In order to analyse this problem, the simulation model is established in this paper and compared of different excavation schemes with large-scale finite element software ABAQUS. The results show that the deformation of retaining structures is minimum,and foundation pit safety is the largest in this condition,which is the ramp C and ramp S were excavated to the line of under ashore, and then excavate foundation pit on the ashore and under the ashore at the same time. The field monitoring data show that the retaining structure deformation and stress have been stabilished and controlled. By using optimize programs, the excavation of foundation is successful. It could provide reference for similar project
%K 立交匝道
%K 偏压基坑
%K 数值分析
%K 现场监测&lt
%K br&gt
%K overpass ramp
%K unsymmetrical loaded foundation pit
%K numerical analysis
%K field monitoring
%U http://www.jrse.cn/paper/paperView.aspx?id=paper_311827