延安某工地填土的渗水和持水特性研究

张龙; 陈正汉; 扈胜霞; 刘争宏; 于永堂; 郑建国

doi:10.11779/CJGE2018S1030

延安某工地填土的渗水和持水特性研究 English Version

1. 机械工业勘察设计研究院有限公司,陕西西安 710043;
2. 中国人民解放军后勤工程学院,重庆 401331;
3. 延安大学建筑工程学院,陕西延安 716000

基金项目: 国家自然科学基金项目（11672330,51309199）; 陕西省科技统筹创新工程计划项目（2014KTDZ03-01,2016KTZDSF04-05-01）; 国机集团重点研发项目（SINOMACH2017科249号）

详细信息

作者简介:
张龙(1988- ),男,河北藁城人,硕士研究生,主要从事非饱和土与特殊土力学研究。E-mail: 709194126@qq.com。

中图分类号: TU411.3;TU443
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出版历程
- 收稿日期: 2017-06-10
- 发布日期: 2018-08-24

Seepage and water retention characteristics of fill in a construction site in Yan'an

1. China Jikan Research Institute of Engineering and Design, Co., Ltd., Xi'an 710043, China;
2. Logistic Engineering University of PLA, Chongqing 401331, China;
3. School of Architecture and Engineering of Yan'an University, Yan'an 716000, China

摘要

摘要: 随着中国城市化进程的不断推进,工程中涉及到的填土日益增多。为了研究非饱和填土的渗水和持水特性,共做了两类试验：一类是考虑不同干密度的非饱和水平土柱入渗试验;另一类为控制净平均应力为0的非饱和土三轴收缩试验。两种试验分别包含3种干密度,分别为1.40,1.50,1.60 g/cm³。试验结果表明：饱和度达到0.65左右时,扩散率近似由两条直线组成;当饱和度低于0.65时,干密度的不同对扩散率影响不大,当饱和度高于0.65时,扩散率存在较大差异;非饱和填土的渗透系数与饱和度的半对数关系近似成直线,且随着饱和度的增大干密度的影响逐渐减小。
- 填土 /
- 水平土柱入渗试验 /
- 三轴试验 /
- 扩散率 /
- 渗透系数
Abstract: With the urbanization in China, there are more and more projects involved with miscellaneous fill. In order to study the seepage and water retention characteristics of unsaturated soils, two kinds of tests are made. One is the horizontal soil column infiltration test with different dry densities, and the other is the triaxial shrinkage test with controlled net mean stress at 0. Both of them include 3 dry densities, 1.40, 1.50 and 1.60 g/cm³. The test results show that when the saturation is about 0.65, the semi-logarithmic relationship between the saturation and the diffusivity is approximated to be two straight lines. Besides, when the saturation is less than 0.65, the difference of dry density has little effect on the diffusivity. When the saturation is higher than 0.65, there is a large difference in the diffusivity. The semi-logarithmic relationship between the permeability coefficient and the saturation of unsaturated miscellaneous fill is approximately linear, and with the increasing saturation, the density has less effect on the permeability.
- fill /
- horizontal column infiltration test /
- triaxial shrinkage test /
- diffusivity /
- permeability coefficient

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参考文献(14)

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