考虑Klinkenberg效应的压实膨润土渗气特性研究

秦冰; 陆飏; 张发忠; 陈正汉; 刘月妙; 王驹

doi:10.11779/CJGE201612007

考虑Klinkenberg效应的压实膨润土渗气特性研究 English Version

秦冰^{1, 2},
陆飏¹,
张发忠¹,
陈正汉¹,
刘月妙³,
王驹³

1. 后勤工程学院国防建筑规划与环境工程系,重庆 401311;
2. 西南科技大学核废物与环境安全国防重点学科实验室,四川绵阳 621010;
3. 核工业北京地质研究院,北京 100029

基金项目: 国家自然科学基金项目（11502299,11272353）; 核废物与环境安全国防重点学科实验室开放基金项目（13zxnk03）

详细信息

作者简介:
秦冰(1984- ),男,博士,讲师,主要从事非饱和土力学与高放废物地质处置领域的研究。E-mail: bingqin1984@163.com。

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出版历程
- 收稿日期: 2015-10-09
- 发布日期: 2016-12-24

Gas permeability of compacted bentonite considering Klinkenberg effect

1. Department of Architecture and Environmental Engineering, Logistical Engineering University, Chongqing 401311, China;
2. Fundamental Science on Nuclear Wastes and Environmental Safety Laboratory, Southwest University of Science and Technology, Mianyang 621010, China;
3. Beijing Research Institute of Uranium Geology, Beijing 100029, China

摘要

摘要: 利用非饱和三轴渗气仪研究了压实高庙子膨润土的渗气特性。发现当渗气系数小于10^-14 m²时,压实膨润土中的Klinkenberg效应较为显著,渗气系数会随气压力的增大而降低;气体滑脱因子随Klinkenberg渗气系数与体积含气率之比的变化满足幂函数关系,试验得到的二者之间关系与干密度、含水率无关,并与Klinkenberg理论模型相近;Klinkenberg渗气系数与体积含气率在双对数坐标中呈线性关系,其斜率与含水率基本无关。基于试验规律,建立了考虑Klinkenberg效应的高庙子膨润土非饱和渗气系数的数学模型。
- 膨润土 /
- 渗气特性 /
- Klinkenberg效应 /
- 高放废物
Abstract: The gas permeability of compacted GMZ bentonite is studied using the triaxial gas permeameter. It is found that the Klinkenberg effect exists when the gas permeability is lower than 10^-14 m². A power relationship is observed between the Klinkenberg slippage factor and the ratio of the Klinkenberg permeability to the air-filled porosity. The relationship is independent on dry density and water content, and is almost identical with the Klinkenberg model. In the double-log scales, there is a linear relationship between the Klinkenberg permeability and the air-filled porosity, of which the slope is almost independent on water content. Based on the test results, a model for unsaturated gas permeability is proposed, in which the Klinkenberg effect is taken into account.
- bentonite /
- gas permeability /
- Klinkenberg effect /
- high-level radioactive waste

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参考文献(39)

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