烟台某工程静压桩隔时复压试验分析  

Interval re-pressed experiment analysis of jacked piles in a given project in Yantai

作　　者：牛永昌[1] 辛翀 张明义[1] 

机构地区：[1]青岛理工大学土木工程学院,青岛266033 [2]烟台市建筑设计研究股份有限公司,烟台264001

出　　处：《青岛理工大学学报》2016年第2期26-29,67,共5页Journal of Qingdao University of Technology

摘　　要：选取烟台地区某典型工程的3根不同区域的静压桩,分别对其进行隔时复压.利用静压桩能够实时显示压桩力的特点,对静压桩进行隔时复压试验,绘制压桩力随时间变化曲线,对该工程静压桩进行时效性分析与研究.分析得出随着时间间隔的增加,复压力逐渐增大,但该工程桩端持力层较强,桩端阻力对承载力的贡献大于侧摩阻力,而承载力时效主要来自于侧摩阻力,所以承载力随时间增长并不显著.Three different static piles of a typical project selected in Yantai are re-pressed respectively in the paper.By using the characteristic of jacked piles to show the pile pressure and re-pressed tests to jacked piles at intervals,it then draws the curve of pile pressure change.The time effect of jacked piles is analyzed in this engineering.Analysis results show that as time intervals increase re-pressure increases too,but this pile-end bearing stratum is stronger,the contribution of the bearing capacity of the pile-end resistance is greater than the lateral friction and the bearing capacity time effect mainly from lateral friction.So bearing capacity growth overtime is not clear.

关 键 词：静压桩 隔时复压 时效性 终压力 

分 类 号：TU473.1[建筑科学—结构工程]