基于沉降资料反演固结系数的方法研究  

Back analysis of consolidation coefficient with in-situ settlement data

作　　者：邓永锋[1] 刘松玉[1] 洪振舜[1] 

机构地区：[1]东南大学交通学院,南京210096

出　　处：《岩土力学》2005年第11期1807-1809,1828,共4页Rock and Soil Mechanics

基　　金：教育部博士点基金项目资助(No.2001028618);东南大学优秀博士学位论文基金资助(No.YBJJ0411)

摘　　要：Asaoka法在岩土工程中经常用于工后沉降的预测,同时Asaoka方法中的Si-Si+1直线的斜率β1和固结系数Cv的关系还被广泛用于反演地基的固结系数。但相关资料表明用该方法反演得到固结系数与地基的固结系数存在一定的误差。为此分析了产生误差的原因,并在此基础上,根据Terzaghi一维固结理论推导了的Si-Si+1直线的斜率k1和固结系数Cv之间的表达式。分析表明采用推导得到的k1-Cv表达式反演的固结系数与地基的固结系数能够较好地吻合。The Asaoka method has often been used to predict the post-construction settlement in geotechnical engineering and the ,consolidation coefficient can be calculated with the quantitative expression of consolidation coefficient Cv versus the slope β1 of the Si-Si＋1 straight line in the Asaoka＇s method based on the observed settlement data. However, it has been reported that the back-analyzed consolidation coefficients with the Asaoka＇s method are not consistent with the in-situ one. This study investigated this discrepancy, and propsoed a new method for calculating the consolidation coefficient based on one-dimensional Terzaghi＇s consolidation theory. The hack-analyzed consolidation coeffcients with the new exnression are anita consistent with the in-situ one.

关 键 词：ASAOKA法 Terzaghi固结理论 固结系数 反演 沉降数据 

分 类 号：TB115[理学—数学] TU411.3[理学—应用数学]