软土地区深基坑支护方案对比分析  

Comparative Analysis of Support Schemes for Deep Foundation Pit in Soft Soil Area

作　　者：赵来群 ZHAO Laiqun(Guangdong Geotechnical Engineering Survey Institute Co.,Ltd.,Huizhou 516006,Guangdong,China)

机构地区：[1]广东省岩土工程勘察院有限公司,广东惠州516006

出　　处：《工程技术研究》2024年第15期171-173,共3页Engineering and Technological Research

摘　　要：文章以某软土地区深基坑工程为研究对象,运用有限元软件对该基坑两种不同的支护结构进行建模分析。为研究不同支护结构在该基坑工程中的支护效果,分析开挖过程中两种支护桩的桩身变形及基坑土体沉降情况,并将模拟所得桩身水平位移、地表沉降与实测数据进行对比。研究表明,随着基坑开挖,桩身水平位移与地表沉降均呈现逐渐增大的趋势;添加钢管内支撑可有效控制桩身水平位移,内支撑式排桩结构模拟结果与现场实测结果有着相似的变化趋势,验证了有限元模拟方法的可行性;与双排桩支护结构相比,内支撑式排桩支护结构具有较小的变形和桩身弯矩,满足设计规范要求。This paper takes a deep foundation pit project in soft soil area as the research object,and uses fi nite element software to model and analyze two different kinds of support structures of the foundation pit.In order to study the support effect of different support structures in the foundation pit project,the deformation of the two kinds of support piles and the settlement of the foundation pit soil during the excavation process are analyzed,and the simulated horizontal displacement of the pile body and the surface settlement are compared with the measured data.The research shows that with the excavation of the foundation pit,the horizontal displacement of the pile body and the surface settlement show a gradually increasing trend;the horizontal displacement of the pile body can be effectively controlled by adding steel pipe inner bearing,the simulation results of the inner-supported row pile structure have a similar change trend with the field measured results,which verifi es the feasibility of the fi nite element simulation method;compared with the doublerow pile support structure,the inner-supported row pile support structure has smaller deformation and pile bending moment,which meets the requirements of the design specifi cation.

关 键 词：软土地区 基坑工程 排桩支护 有限元分析 桩身弯矩 

分 类 号：TU753[建筑科学—建筑技术科学]