咬合桩在苏州地铁南施街站中的应用  

Application of secant piles in Nanshijie station of Suzhou subway

作　　者：高新南[1] 王占生[2] 童立元[1] 方磊[1] 

机构地区：[1]东南大学岩土工程研究所,江苏南京210096 [2]苏州轨道交通有限公司,江苏苏州215006

出　　处：《岩土工程学报》2010年第S2期463-466,共4页Chinese Journal of Geotechnical Engineering

基　　金：苏州市科技计划支撑项目(ZXJ0805)

摘　　要：通过对苏州地铁南施街站深基坑工程中咬合桩的施工情况介绍及实测变形分析,证明咬合桩在苏州地铁中的应用是成功的,但因其工艺特殊,因此对施工人员的要求较高。监测数据表明基坑南侧的地表沉降相对较小,沉降曲线呈抛物线形分布,基坑西侧的地表沉降相对较大,沉降曲线近似呈三角形分布;围护墙体水平位移两端变形小、中间变形大,第一道砼支撑能有效控制围护桩墙内外位移,对保证基坑开挖安全起到了重要的作用。这些可为后续地铁线路及城市建筑的基坑建设提供借鉴。The construction and deformation analysis shows that the application of secant piles is successful in Nanshijie station of Suzhou subway.Due to the peculiarities of construction technique,the construction of secant piles need a higher requirements to builders.Monitoring data shows that the surface settlement in the south of the foundation pit displays parabola-shaped distribution,while that in the west of the foundation pit displays triangular-shape distribution.The horizontal displacement of retaining wall increases with the excavation depth,and the characteristic of the larger deformation in the center and the smaller ones in both sides is obtained.The first reinforced concrete support imposes restriction on the horizontal displacement of retaining walls,which ensures the safety and stability of foundation pit.It can provide an example and reference for the design and construction of these kinds of projects.

关 键 词：地铁 咬合桩 施工 监测 

分 类 号：TU753.3[建筑科学—建筑技术科学]