某地铁车站深基坑施工期围护结构及邻近建筑变形监测与分析  

Deformation Monitoring and Analysis of Buildings Nearby and Deep Foundation Excavation Support in a Subway Station Construction

作　　者：刘新[1] 林源[2] 张军[3] 胡长明[2] 梅源[2] 

机构地区：[1]陕西铁路工程职业技术学院新校区建设指挥部,陕西渭南714000 [2]西安建筑科技大学土木工程学院,陕西西安710055 [3]中国中铁一局集团有限公司,陕西西安710054

出　　处：《施工技术》2014年第13期55-58,共4页Construction Technology

基　　金：陕西省科技攻关计划(2011k10-20);包头市科技计划项目(2011x1006)

摘　　要：以黄土地区某地铁车站深基坑工程为例,根据监测结果分析了基坑开挖围护结构的变形规律及邻近建筑物的安全。结果表明:黄土深基坑施工对周围环境的影响较小,在黄土深基坑周边无复杂环境时,可对支护结构进行优化;黄土深基坑钢支撑存在应力松弛现象,施工过程中应采取科学措施减小预应力的损失;基坑周边地面最大沉降点距基坑边缘有一定距离,地表沉降形状类似于勺形;邻近建筑物整体呈现出向基坑倾斜的趋势,差异沉降较小,且未出现裂缝。With the deep foundation excavation project of a subway station in loess area as the background, this paper analyses the deformation law of deep foundation excavation support and the safety of buildings nearby based on the result of deformation monitoring. It proves that the deep loess foundation excavation construction has less effect on surroundings and the support structures can be optimized under general environment. Stress-relaxation is observed in steel braces. Therefore, in construction, scientific measures should be taken to reduce the loss of prestress. The point with maximum settlement is in a certain distance with the edge of foundation excavation and the shape of the settlement is similar to a spoon. The buildings nearby tend to incline to the foundation excavation. The differential settlement is less and no cracks appear.

关 键 词：地铁 车站 黄土地区 深基坑 支护 变形 监测 

分 类 号：TU745[建筑科学—建筑技术科学]