上海饱和软土中预制桩承载力时效性分析  

TIME-EFFECT ANALYSIS ON BEARING CAPACITY OF PRECAST PILE FOR SATURATED SOFT SOIL IN SHANGHAI

作　　者：李桂宝[1] 张磊[1] 

机构地区：[1]同济大学地下建筑与工程系,上海200092

出　　处：《低温建筑技术》2011年第3期92-94,共3页Low Temperature Architecture Technology

摘　　要：在上海嘉定地区对预制桩进行不同休止期及不同加载程序的静载荷试验,并在试验中量测桩的轴力。通过得到的数据来分析不同部位的侧摩阻力、桩端阻力以及沉降随时间变化规律,进而更具体地分析饱和软土中桩的时效性对桩的承载力的影响。分析表明:随着时间增长,桩周被扰动土的结构强度逐渐恢复,桩端阻力及侧摩阻力逐渐增加,呈现明显的时效性。The loading test of precast pile is done under different rest period and loading produce in Jiading Shanghai area,axial force is got from the test.Side friction of different part,end resistance and settlement of pile are analyzed through data from the test,time-effect on bearing capacity of precast pile is further researched specifically.The analysis shows that the frame of the disturbed soil around the pile come back lentamente as the time went by.The side friction and end resistance enhance slowly,the time-effect is obvious.

关 键 词：饱和软土 承载力 休止期 时间效应 

分 类 号：TU473[建筑科学—结构工程]