复杂填海地层中地铁基坑开挖变形实测分析  

Excavation Deformation Analysis of Subway Foundation Pit in Complex Reclamation Strata

作　　者：曹勇 王维 衣利伟 陈正红 陈秋南[2] 吴岑佳 石红兵 CAO Yong;WANG Wei;YI Li-wei;CHEN Zheng-hong;CHEN Qiu-nan;WU Cen-jia;SHI Hong-bing(China Construction Fifth Engineering Division Co.Ltd.,Changsha 410004,China;Hunan University of Science and Technology,Xiangtan 411201,China;China Construction Infrastructure Co.Ltd.,Beijing 100044,China)

机构地区：[1]中国建筑第五工程局有限公司,长沙市410004 [2]湖南科技大学土木工程学院,湘潭市411201 [3]中国建设基础设施有限公司,北京市100044

出　　处：《公路》2022年第3期356-361,共6页Highway

基　　金：国家自然科学基金项目,项目编号52078211,51909087;湖南省自然科学基金项目,项目编号2020JJ4021;中建股份科研课题,项目编号CSCEC-2019-Z-19;中建五局科研课题,项目编号cscec5b-sd-2020-5。

摘　　要：为探究复杂填海地层中深基坑的变形规律,对深圳地铁13号线深登明挖区间开挖过程中围护桩水平位移和地表沉降的现场监测数据进行了分析。结果表明:开挖过程中围护桩最大水平位移均小于开挖深度的0.13%,最大水平位移出现在开挖面3 m以下与4 m以上之间,围护桩水平位移沿桩身呈现两头小中间大的“鼓胀”形分布;地表沉降的增长与围护桩水平位移的增加同步发生,地表沉降形态为“凹槽”形,最大地表沉降发生在距坑边0.45倍基坑深度的位置。本研究为了解深圳地区复杂填海地层的基坑变形规律提供了参考依据。In order to explore the deformation rules of deep foundation pit in complex reclamation strata, the field monitoring data of the horizontal displacement and surface settlement of the retaining pile during the excavation of the Shenzhen Metro Line 13 open-cut section are analyzed. The results show that during the excavation process, the maximum horizontal displacement of the retaining pile is less than 0.13% of the excavation depth, the maximum horizontal displacement occurs between 3 m below and 4 m above the excavation face,and the horizontal displacement of the retaining pile presents a bulging distribution along the pile.The increase of surface settlement occurs simultaneously with the increase of horizontal displacement of pile,the surface settlement form is a“groove”shape,and the maximum surface settlement occurs at a position 0.45times the depth of the foundation pit from the side of the pit.The research in this paper provides a reference basis for understanding the deformation laws of foundation pits in the complex sea-filled stratum in Shenzhen area.

关 键 词：深基坑 填海地层 现场监测 水平位移 地表沉降 

分 类 号：TU753[建筑科学—建筑技术科学]