摘要
重庆市东水门长江大桥与千厮门嘉陵江大桥渝中连接隧道近接重庆市第一人民医院在建门诊大楼,其采用明挖法施工,基坑与在建门诊大楼最近距离约0.6 m。针对该隧道工程,提出基坑间近距离近接部分采用岩土体全部开挖、其余部分采用悬臂桩板墙进行基坑围护的工程方案,并对上述2个区域2种方案的基坑施工分别采用三维与二维有限元进行数值模拟,以评估明挖隧道基坑施工对在建门诊大楼的影响。结果表明:在建门诊大楼基础变形在可控范围内;采用部分挖除基坑间岩土体、部分围护基坑的方法进行近接在建建筑物基坑施工是可行的。
Yuzhong tunnel connecting Chongqing Dongshuimen Yangtze River Bridge and Qiansimen Jialing River Bridge is adjacent to out-patient building of Chongqing First People ’ s Hospital under construction, the tunnel is constructed in open excavated method and foundation pits are approximate 0. 6m at the nearest distance from the out-patient building under construction. Aiming at this tunnel project, this paper proposes an engineering scheme in which the rock-soil bodies in adjacent parts at near distance between foundation pits are all excavated by means of and for the other parts cantilever pile panel walls are employed to enclose foundation pits, and carries out numerical simulation for construction of foundation pits in above two areas in two schemes by means of 3 D and 2 D finite elements to evaluate the influences of foundation pits of open excavated tunnels on the out-patient building under construction. The results show that deformation of foundations of the out-patient building under construction is within the controllable range;the method of partially excavating rock-soil bodies between foundation pits and partially enclosing foundation pits to construct foundation pits adjacent to the buildings under construction is feasible.
出处
《公路交通技术》
2014年第6期58-62,68,共6页
Technology of Highway and Transport
基金
重庆市应用开发(重大)项目(cstc2013yykf C30001)
重庆市基础与前沿研究计划项目(cstc2014jcyj A30020)
重庆市科技攻关计划项目(cstc2012gg-yyjs30002)
重庆市应用开发计划项目(cstc2013yykf B30005)
关键词
隧道
基坑
建筑
近接施工
基础
tunnel
foundation pit
building
adjacent construction
foundation
