伊犁黄土总吸力和基质吸力土水特征曲线拟合模型

张爱军; 王毓国; 邢义川; 于春亮; 赵庆玉

doi:10.11779/CJGE201906007

伊犁黄土总吸力和基质吸力土水特征曲线拟合模型 English Version

1. 西北农林科技大学水利与建筑工程学院,陕西杨凌 712100;
2. 中国水利水电科学研究院,北京 100048

基金项目: “十三五”国家重点研发计划资助项目（2017YFC0405103）; 陕西省重点研发计划（2017ZDXM-SF-074）

详细信息

作者简介:
张爱军(1964— ),男,山西阳高人,教授,博士生导师,主要从事岩土工程教学与科研工作。E-mail：zaj@nwsuaf.edu.cn。

通讯作者:
王毓国，E-mail：eaglew@nwsuaf.edu.cn

中图分类号: TU444
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出版历程
- 收稿日期: 2018-04-09
- 发布日期: 2019-06-24

Fitting models for soil-water characteristic curve of total and matrix suctions of Yili loess

1. College of Water Resources and Architectural Engineering, Northwest A & F University, Yangling 712100, China;
2. China Institute of Water Resources and Hydro Power Research, Beijing 100048, China

摘要

摘要: 新疆伊犁黄土具有湿陷性强烈、易溶盐含量高的特点,描述其非饱和土应力状态中的吸力参量时,须同时考虑总吸力和基质吸力两个参量。为此,通过滤纸法开展了不同含盐量下伊犁黄土的土水特征曲线试验,测量了不同含盐下伊犁黄土的总吸力与基质吸力,计算了不同含盐量下土样中溶液浓度,分析了含盐量对湿陷的影响,基于Gardner模型,提出了可以考虑易溶盐含量影响的伊犁黄土总吸力和基质吸力土水特征曲线的拟合模型。研究结果表明：含盐量对新疆伊犁黄土的基质吸力有一定影响,对总吸力与渗透吸力影响较大;土样溶液浓度随着含盐量的增大而增大,总吸力与溶液浓度之间呈线性关系;随着土样内易溶盐含量的增加,土样湿陷系数明显增大;提出的土水特征曲线模型可以考虑易溶盐含量的影响,可以统一描述伊犁黄土总吸力和基质吸力随含水率、易溶盐含量变化的规律。
- 拟合模型 /
- 滤纸法 /
- 含量盐 /
- 溶液浓度 /
- 吸力 /
- 湿陷
Abstract: The Yili loess of Xinjiang is characterized by strong collapsibility and high soluble salt content. For describing the suction parameters in the stress state of the unsaturated soils, both the total and matrix suctions should be taken into account. Therefore, the soil-water characteristic curve (SWCC) tests on Yili loess with different salt contents are carried out by using the filter paper method. The total and matric suctions of Yili loess with different salt contents are measured. The solution concentrations of samples with different salt contents are calculated. Additionally, the effects of salt content on the collapsibility are analyzed. Based on the Gardner model, fitting models for SWCC of total and matrix suctions for Yili loess which can consider the influences of soluble salt content are proposed. The test results show that the salt content has a certain influence on the matrix suction of Yili loess of Xinjiang, and it has a great effect on the total and osmotic suction. The solution concentration in the soil samples increases with the increase of the salt content, and there is a linear relationship between the total suction and the concentration. With the increase of soluble salt content, the collapsibility of soil samples increases obviously. The proposed SWCC models can consider the influences of soluble salt content, and they can describe the variation of the total suction and matrix suctions for Yili loess with water content and soluble salt content.
- fitting model /
- filter paper method /
- salt content /
- solution concentration /
- suction /
- collapsibility

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参考文献(21)

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伊犁黄土总吸力和基质吸力土水特征曲线拟合模型 English Version

作者简介: 张爱军(1964— ),男,山西阳高人,教授,博士生导师,主要从事岩土工程教学与科研工作。E-mail：zaj@nwsuaf.edu.cn。

通讯作者: 王毓国，E-mail：eaglew@nwsuaf.edu.cn

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出版历程

Fitting models for soil-water characteristic curve of total and matrix suctions of Yili loess

计量

出版历程

目录

作者简介:
张爱军(1964— ),男,山西阳高人,教授,博士生导师,主要从事岩土工程教学与科研工作。E-mail：zaj@nwsuaf.edu.cn。

通讯作者:
王毓国，E-mail：eaglew@nwsuaf.edu.cn