沉降速率与剩余沉降的关系  

Relationship between settlement velocity and residual settlement

作　　者：刘吉福[1,2] 

机构地区：[1]华南理工大学建筑学院,广东广州510640 [2]广东省航盛建设集团有限公司,广东广州511442

出　　处：《广西大学学报（自然科学版）》2010年第1期193-198,共6页Journal of Guangxi University（Natural Science Edition）

基　　金：广东省科技计划项目(2004B32801002);广东省交通厅科技计划项目(2002-08)

摘　　要：针对工程实践中沉降速率常用于确定卸载时机、双曲线常用于拟合沉降曲线的情况,研究了沉降速率与剩余沉降的关系,对符合双曲线的沉降—时间曲线进行了推导分析,结合工程实例证明了沉降速率与剩余沉降的平方成正比,进而推导得到容许工后沉降控制的卸载、路面施工沉降速率标准。相同剩余沉降,沉降—时间曲线为双曲线时沉降速率小于沉降—时间曲线为指数曲线时的沉降速率。工程实例和算例均证实了研究结果的正确性。Settlement velocity is often used to decide time of unloading and hyperbolic curve is often used for fitting of curve of settlement arid time. Settlement curve which can be fitted by hyperbolic curve is analyzed to study relationship of settlement velocity and residual settlement. It is proven that settlement velocity is in direct proportion to square of residual settlement when curve of settlement and time is hyperbolic by theoretical analysis and project example. Settlement velocity before unloading and pavement construction controlled by allowable post- construction settlement is derived. The settlement velocity when curve of settlement and time is hyperbolic is larger that of the same residual settlement when curve of settlement and time is exponential. The result of the paper is proven reasonable by project example and numerical example.

关 键 词：沉降速率 剩余沉降 工后沉降 双曲线 

分 类 号：TU433[建筑科学—岩土工程]