对沉降速率法确定卸载时机的认识  

UNDERSTANDING OF DETERMINATION OF UNLOADING TIME USING SETTLEMENT VELOCITY METHOD

作　　者：刘吉福[1] 莫海鸿[1] 

机构地区：[1]华南理工大学建筑学院

出　　处：《岩石力学与工程学报》2007年第A01期3065-3072,共8页Chinese Journal of Rock Mechanics and Engineering

摘　　要：针对目前确定卸载时机的沉降速率法存在的缺点,推导得到沉降速率与工后沉降的关系式,论证成层地基也可采用沉降速率法,提出可以考虑超载、欠载、次固结等因素并适用于复合地基的确定沉降速率卸载标准的方法,试验结果和工程实践表明所推导的关系是正确的。There are some shortcomings with present settlement velocity method to decide unloading time.Relation between settlement velocity and post-construction settlement is deduced.It is testified that the settlement velocity method is suitable for multi-layer ground.A new method to determine unloading criterion of settlement velocity is advanced.This method can take overload,undercharge,secondary consolidation into account and is suitable for composite foundation.Experiments and engineering practices show that the method is right.

关 键 词：土力学 沉降速率法 剩余沉降 工后沉降 超载 

分 类 号：TU47[建筑科学—结构工程]