粘性土地区静压PHC管桩承载力时效性研究  

STUDY OF TIME EFFECT ON THE BEARING CAPACITY OF JACKED-IN PHC PIPE PILE IN COHESIVE SOIL AREA

作　　者：左宏亮[1] 李航[1] 刘景云[2] 

机构地区：[1]东北林业大学土木工程学院,哈尔滨150040 [2]哈尔滨工业大学建筑设计研究院,哈尔滨150006

出　　处：《低温建筑技术》2009年第1期85-86,共2页Low Temperature Architecture Technology

摘　　要：确定单桩竖向极限承载力一直是桩基础设计的重要问题,本文通过哈尔滨某工程的静压预应力管桩的隔时复压试验,并根据静压桩的单桩竖向极限承载力随时间呈双曲线增长的关系,得到粘性土地区依据沉桩终压力推算单桩竖向极限承载力的估算公式。In pile foundation design, it is always an important problem to define the vertical ultimate beating capacity. The re - pressed tests were done on the jacked - in PHC pipe pile of one project in Harbin, at different time. The hyperbolic relationship of the vertical ultimate bearing capacity and time presented an increasing tendency. Based on the result, an estimating formula was proposed to calculate the vertical ultimate bearing capacity of the pile according to final pressure in cohesive soil area.

关 键 词：静压PHC管桩 粘性土地区 承载力 时效性 

分 类 号：TU473[建筑科学—结构工程]