深基坑支护工程预应力悬臂支护结构施工技术  

Construction Technology of Prestressed Cantilever Support Structure in Deep Foundation Pit Support Engineering

作　　者：付隽苍 李根源 崔万海 刘丹 彭强 FU Juancang;LI Genyuan;CUI Wanhai;LIU Dan;PENG Qiang(YCIH No.2 Construction Co.,Ltd.,Kunming,Yunnan 650203,China)

机构地区：[1]云南建投第二建设有限公司,云南昆明650203

出　　处：《建筑施工》2021年第11期2241-2243,共3页Building Construction

摘　　要：为解决场地狭窄、周边环境复杂条件下的基坑支护施工难题,介绍了预应力悬臂支护结构体系。通过对支护结构施加预应力,使支护结构由向坑外位移趋势产生的土反力增量近似等于主动土压力,有效地控制了基坑变形,并缩短了施工周期。通过项目研究和应用,形成了一套完善的预应力支护结构施工体系,可为类似工程借鉴。To solve the problem of foundation pit support construction under the condition of narrow site and complex surrounding environment,the prestressed cantilever support structure system is introduced.The prestress is applied to the supporting structure,so that the increment of soil reaction force generated by the displacement trend of the supporting structure outside the pit is approximately equal to the active earth pressure.The deformation of foundation pit is effectively controlled and the construction period is shortened.A perfect construction system of prestressed support structure is formed by the project research and application,which can be used as a reference for similar projects.

关 键 词：深基坑 预应力悬臂支护桩 钢绞线 变形控制 

分 类 号：TU753[建筑科学—建筑技术科学]