一种修正的软土次固结计算公式  

A modified formula of soft soil secondary consolidation

作　　者：徐楠[1,2] 吴跃东 XU Nan;WU Yuedong(Key Laboratory of Ministry of Education for Geomechanics and Embankment Engineering,Hohai University,Nanjing 210098, China;Jiangsu Research Center for Geotechnical Engineering Technology, Nanjing 210098, China)

机构地区：[1]河海大学岩土力学与堤坝工程教育部重点实验室,江苏南京210098 [2]江苏省岩土工程技术工程研究中心,江苏南京210098

出　　处：《水利水电科技进展》2018年第3期66-69,共4页Advances in Science and Technology of Water Resources

基　　金：国家自然科学基金(51279049);中央高校基本科研业务费专项(2015B06014)

摘　　要：通过室内压缩试验研究了软土次固结系数与压力的关系,结果表明可以分别用幂函数和双曲线函数拟合超固结土和正常固结土的次固结系数-压力关系曲线。在试验研究的基础上,考虑压力大小影响和计算收敛特征,对常规次固结计算公式进行修正,提出了一种次固结计算修正公式。工程实例计算结果表明,修正公式能更好地反映软土的次固结特性,具有一定的工程应用价值。The relationship between the secondary consolidation coefficient and pressure for soft soil is studied by indoor compression test. It is found that the secondary consolidation coefficient-pressure curve of over-consolidated soil and normal consolidated soil can be fitted by a power function and a hyperbola function,respectively. Based on the experiment,the conventional secondary consolidation formula was corrected and a modified one was proposed considering the effect of pressure and the convergence characteristic of calculation. The results of its application to an engineering project show that the new formula can better reflect the secondary consolidation characteristic of soft soil,indicating great engineering value.

关 键 词：软土 次固结系数 固结压力 工后沉降 压缩试验 

分 类 号：TU470.3[建筑科学—结构工程]