| 非饱和土粘弹性地基一维固结特性分析 |
| |
| 引用本文： | 秦爱芳,罗坤,孙德安.非饱和土粘弹性地基一维固结特性分析[J].上海大学学报(自然科学版),2010,16(2):203-209. |
| |
| 作者姓名： | 秦爱芳 罗坤 孙德安 |
| |
| 作者单位： | 上海大学,土木工程系,上海,200072 |
| |
| 摘 要： | 基于Fredlund的非饱和土一维固结理论,采用李氏比拟法,研究有限厚度粘弹性非饱和土层在大面积均布瞬时加荷时的一维固结问题.针对Merchant粘弹性模型,采用Laplace变换及Cayley-Hamilton等数学方法,引入边界及初始条件,得到Laplace变换域内顶面排气不排水、底面不渗透情况下粘弹性非饱和土地基一维固结时的超孔隙水压力、超孔隙气压力以及土层沉降的解,采用Crump及Durbin方法实现Laplace逆变换,获得半解析解;分析在不同气、水渗透系数比ka/kw下,Merchant粘弹性模型的Kelvin体中弹性模量E1和粘滞系数η等对粘弹性非饱和土地基一维固结特性的影响,揭示粘弹性非饱和土地基的固结特性;最后通过与弹性解析解的对比,验证了半解析解方法的正确性.
|
| 关 键 词： | 非饱和土 粘弹性 一维固结 半解析解 Laplace 变换 |
| 收稿时间： | 2008-11-17 |
Analysis of Consolidation Characteristic of One-Dimensional Visco-Elastic Consolidation for Unsaturated Soils |
| |
| QIN Ai-fang,LUO Kun,SUN De-an.Analysis of Consolidation Characteristic of One-Dimensional Visco-Elastic Consolidation for Unsaturated Soils[J].Journal of Shanghai University(Natural Science),2010,16(2):203-209. |
| |
| Authors: | QIN Ai-fang LUO Kun SUN De-an |
| |
| Institution: | QIN Ai-fang,LUO Kun,SUN De-an(Department of Civil Engineering,Shanghai University,Shanghai 200072,China) |
| |
| Abstract: | On the basis of Fredlund's analytical consolidation theory for one-dimensional consolidation for unsaturated soils and by application of Lee's match method,one-dimensional consolidation for an unsaturated soil layer with a finite thickness,and with one-dimensional load applied,is proposed.By using the Merchant visco-elastic ground model,and Laplace transform and Cayley-Hamilton method,solutions of the excessive pore-air pressure are obtained.Excessive pore-water pressure and the settlement rate of soil whil... |
| |
| Keywords: | Laplace unsaturated soil visco-elastic one-dimensional consolidation semi-analytical solution Laplace's transform |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
| 点击此处可从《上海大学学报(自然科学版)》浏览原始摘要信息 |
| 点击此处可从《上海大学学报(自然科学版)》下载免费的PDF全文 |
|
