| 压缩过程中重塑黏土渗透系数的变化规律 |
| |
| 引用本文： | 曾玲玲,洪振舜,陈福全.压缩过程中重塑黏土渗透系数的变化规律[J].岩土力学,2012,33(5):1286-1292. |
| |
| 作者姓名： | 曾玲玲 洪振舜 陈福全 |
| |
| 作者单位： | 1.福州大学 土木工程学院，福州 350108；2.东南大学 岩土工程研究所，南京 210096 |
| |
| 基金项目： | 国家自然科学基金资助项目(No.41102168,No.41172240) |
| |
| 摘 要： | 重塑黏土渗透系数是岩土工程众多领域中的一个重要参数，分析其主要影响因素并提出简单实用的定量表达式有着重要的理论价值及工程应用前景。已有的渗透系数预测方法或者由于参数复杂，或者由于适用范围窄、精度低，不能很好地得到应用。收集了已有不同文献23组液限变化范围为40%～300%的重塑黏土的固结渗透试验数据，通过分析指出了土体压缩过程中当应变大于20%时渗透系数对数值与孔隙比成非线性指数关系而非线性关系，明确了已有渗透系数预测方法的主要缺陷。采用多元线性回归分析方法，揭示了影响黏土渗透系数的主要影响因素，提出了适用范围广、参数简单的渗透系数定量计算表达式。
|
| 关 键 词： | 重塑黏土 渗透系数 预测方法 孔隙比 液限 |
| 收稿时间： | 2011-06-15 |
A law of change in permeability coefficient during compression of remolded clays |
| |
| ZENG Ling-ling
,
HONG Zhen-shun
,
CHEN Fu-quan.A law of change in permeability coefficient during compression of remolded clays[J].Rock and Soil Mechanics,2012,33(5):1286-1292. |
| |
| Authors: | ZENG Ling-ling HONG Zhen-shun CHEN Fu-quan |
| |
| Institution: | 1. College of Civil Engineering, Fuzhou University, Fuzhou 350108, China; 2. Institute of Geotechnical Engineering, Southeast University, Nanjing 210096, China |
| |
| Abstract: | The difficulty in measuring the permeability of clays with enough accuracy enhances the importance of quantitatively predicting the permeability with simple physical parameters.This study collects 23 groups of data of permeability of remolded clays considering the effect of oedometer consolidation pressure.The investigated clays cover a wide range of liquid limits,varying from 40% to 300%.Based on the data of permeability,it is found that the logarithm of permeability coefficient changes with the void ratio in the exponential form,other than in the linear relationship,especially when the volumetric strain reaches the level of 20%.The controlling factors of the permeability coefficient of clays are analysed by multiple regression analysis.A simple method is also proposed for predicting the permeability coefficient,which can be applied to remolded clays with wide ranges of liquid limit and void ratio. |
| |
| Keywords: | remolded clays permeability coefficient predicting method void ratio liquid limit |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
| 点击此处可从《岩土力学》浏览原始摘要信息 |
| 点击此处可从《岩土力学》下载免费的PDF全文 |
