拉拔式可回收预应力锚索在大型机场深基坑施工中的应用  

Application of Pullable Recoverable Prestressed Anchor Cable in Deep Foundation Pit Construction of Large Airport

作　　者：周张浩 庞程程[2] 司法强 谢燕辉 王刚[2] Zhou Zhang-hao;Pang Cheng-cheng;Si-Fa Qiang;Xie Yan-hui;Wang Gang

机构地区：[1]杭州萧山建筑科学研究有限公司,杭州310000 [2]中国建筑第八工程局有限公司,上海200120

出　　处：《建筑技术开发》2021年第2期158-160,共3页Building Technology Development

基　　金：大型空港综合交通枢纽扩建工程综合技术研究(课题编号:2019-2-05)。

摘　　要：杭州萧山国际机场三期项目新建航站楼工程为地下2层,地上4层(局部6层)框架结构,航站楼主楼总建筑面积为534829m^(2),其中地上面积为477522m^(2),地下面积为57307m^(2).航站楼A2区基坑为下穿通道,通道分为B2、B3区域基坑开挖深度为-13.95-19.65 m,分别进入交通中心3层和4层,A2区南侧为航站楼A1区域,挖深7~20m深度不等,针对A2区后开挖,A1和A2区域隔断部位采用桩锚支护,进行了开挖顺序分析,提出了A1区基坑锚索支护采用拉拔式可回收预应力方法。解决了锚索遗留在A2区造成工程桩施工地下障碍物的问题,达到了绿色施工的理念同时提高了施工效益。The new terminal building project of the third phase of Hangzhou Xiaoshan International Airport project is a frame structure with 2 floors underground and 4 floors above ground(partially 6 floors).The total construction area of the terminal building is 534829 m^(2),of which the aboveground area is 477522 m^(2) and the underground area is 57307 m^(2).The foundation pit in the A2 area of the terminal building is the underpass.The channel is divided into the B2 and B3 areas.The excavation depth of the foundation pit is-13.95 to-19.65m.lt enters the third and fourth floors of the traffic center respectively.The south side of the A2 area is the tenninal building Generally in the Al area,the excavation depth varies from 7 to 20 meters.For the post excavation in the A2 area,pile anchor support is used for the partition of the Al and A2 area.The excavation sequence is analyzed,and the anchor cable support of the foundation pit in the A1 area is proposed.The protection adopts the drawing type recyclable prestress method.The problem of underground obstacles in the construction of engineering piles caused by the remaining anchor cables in the A2 area has been solved,and the concept of green construction has been achieved while improving construction benefits.

关 键 词：绿色施工 锚索施工 拉拔式可回收 地下障碍物 

分 类 号：TU391[建筑科学—结构工程]