软土地区三轴搅拌桩施工对周边土体的影响特性和机理研究  

Study on Influence Characteristics and Mechanism of Triaxial Mixing Pile Construction on Surrounding Soil in Soft Soil Regions

作　　者：杨科[1] YANG Ke(Architectural Design&Research Institute of Tongji University,Shanghai 200092,China)

机构地区：[1]同济大学建筑设计(集团)有限公司,上海200092

出　　处：《建筑施工》2025年第4期521-525,共5页Building Construction

基　　金：上海市优秀技术带头人计划资助(22XD1434600)。

摘　　要：随着城市建设的完善,城市中心基坑开挖需要保护的设施越来越多,基坑开挖变形控制要求也越来越高。深基坑工程中采用三轴搅拌桩水泥土加固作为止水帷幕、槽壁加固或坑内加固被广泛应用。基坑变形分析的经典理论中,常常忽略水泥土加固施工对周边环境的影响。然而随着工程实测数据的积累,反映出基坑工程周边环境变形在水泥土加固施工阶段就有所发展。通过对软土基坑工程变形实测数据的整理分析,结合数值模拟总结了水泥土加固施工期间的变形特性和影响因素,并针对性地给出了水泥土加固施工阶段的变形控制方法。As urban construction advances,increasing numbers of facilities require protection during foundation pit excavation in city centers,leading to stricter deformation control requirements.Cement-soil reinforcement using triaxial mixing piles is widely adopted in deep foundation pit engineering as waterproof curtains,trench wall reinforcement,or internal pit stabilization.Classical theories for foundation pit deformation analysis often neglect impacts of cementsoil reinforcement construction on adjacent environments.However,accumulated field monitoring data reveals that environmental deformations around foundation pits develop during cement-soil reinforcement construction.Through systematic analysis of deformation monitoring data from soft soil foundation pits and numerical simulations,deformation characteristics and influencing factors during cement-soil reinforcement construction are identified.Targeted deformation control methods for this construction stage are subsequently proposed.

关 键 词：三轴搅拌桩 施工扰动 周边环境 软土地区 

分 类 号：TU753[建筑科学—建筑技术科学]