软基路堤沉降速率与剩余沉降的关系  

Relationship between settlement rate and residual settlement of embankment on soft ground

作　　者：周春儿[1] 刘吉福 

机构地区：[1]河海大学土木工程学院,江苏南京210098 [2]广东省航盛建设集团有限公司,广东广州511442

出　　处：《中南大学学报（自然科学版）》2011年第3期817-822,共6页Journal of Central South University:Science and Technology

基　　金：广东省科技计划项目(2004B32801002)

摘　　要：针对高速公路建设时工后沉降法与沉降速率法确定的卸载时机往往不一致的现象,对工后沉降与沉降速率之间的关系进行研究,由双曲线型的时间与沉降曲线推导沉降速率与剩余沉降的关系,并利用压缩试验和模型试验进行验证。采用双曲线法对2条高速公路的实测沉降推算最终沉降,绘制沉降速率与剩余沉降的散点图、沉降速率与剩余沉降的平方的散点图。研究结果表明:沉降速率与剩余沉降的平方成正比;沉降速率与剩余沉降的平方基本上呈正比关系,沉降速率与剩余沉降呈折线关系。The relationship between settlement rate and residual settlement of embankment was studied on soft ground,expressions of residual settlement and settlement rate were respectively derived from the hyperbolic time-settlement curves,based on which the relational expression of the settlement rate and residual settlement were deduced.The final settlement and residual settlement were deduced according to measured settlement information using hyperbolic method,and the dot graphs of measured settlement rate and corresponding residual settlement,measured settlement rate and residual settlement square were respectively drawn,and the measured settlement information of embankments on soft ground of two expressways were made.The results show that the settlement rate is in direct proportion to residual settlement square.The embankment on soft ground of the two expressways is basically in direct proportion to the residual settlement square,and the settlement rate has polygonal relation with residual settlement.

关 键 词：沉降速率 剩余沉降 软基路堤 

分 类 号：TU44[建筑科学—岩土工程]