预应力管桩锤击法施工监测分析  

Construction Monitoring Analysis of Prestressed Pipe Pile Hammering Method

作　　者：何峰[1] He Feng

机构地区：[1]化学工业岩土工程有限公司,南京210031

出　　处：《建筑技术开发》2020年第23期72-73,共2页Building Technology Development

摘　　要：对于桩中心距不大于6倍桩径的桩基(密桩),随着锤击沉桩过程中产生挤土效应和超孔隙水压力,会使桩及周围土体发生水平和竖向位移,从而降低桩基承载力并对周边环境造成影响。结合工程实例中PHC管桩沉桩过程的监测成果,分析桩及周围土体的水平及竖向位移,提出了大面积密桩施工过程中采取监测的重要性,对类似工程具有指导意义。For pile foundations(dense piles)with a pile center distance not greater than 6 times of the pile diameter,the soil squeezing effect and excess pore water pressure during the hammering and sinking of the pile will cause horizontal and vertical displacement of the pile and surrounding soil,thus reduce the bearing capacity of the pile foundation and affect the surrounding environment.This article combines the monitoring results of the PHC pipe pile sinking process in the engineering example,analyzes the horizontal and vertical displacements of the pile and surrounding soil,and puts forward the importance of monitoring during the construction of large-area dense piles,which has guiding significance for similar projects.

关 键 词：密桩 挤土效应 变形监测 

分 类 号：TU753.3[建筑科学—建筑技术科学]