Experimental study on the hydro-mechanical behavior of a clayey rock

YU Hong-dan; WANG Zhen; CHEN Wei-zhong; LI Fan-fan; MA Yong-shang; YANG Hai-yan

doi:10.16285/j.rsm.2022.0615

English Version Journal Login

您当前的位置：

首页 >

文章列表页 >

Experimental study on the hydro-mechanical behavior of a clayey rock

更新时间：2026-06-25

- Experimental study on the hydro-mechanical behavior of a clayey rock
- Vol. 43, Issue 8, Pages: 2165-2175(2022)
- 作者机构：
  
  1. 中国科学院武汉岩土力学研究所岩土力学与工程国家重点实验室,湖北,武汉,430071
  2. 中国交通建设股份有限公司,北京,100088
  3. 安徽省交通规划设计研究总院股份有限公司工程技术研究院,安徽,合肥,230088
  4. 济南城建集团有限公司,山东,济南,250031
- 作者简介：
- 基金信息：
- DOI：10.16285/j.rsm.2022.0615
  CLC： TU45
- Online First：17 August 2022，
  
  Published：2022
- 稿件说明：
移动端阅览
YU Hong-dan, WANG Zhen, CHEN Wei-zhong, et al. Experimental study on the hydro-mechanical behavior of a clayey rock[J]. 2022, 43(8): 2165-2175.
DOI：

YU Hong-dan, WANG Zhen, CHEN Wei-zhong, et al. Experimental study on the hydro-mechanical behavior of a clayey rock[J]. 2022, 43(8): 2165-2175. DOI： 10.16285/j.rsm.2022.0615.

摘要

对于高放废物地质处置工程，地质屏障系统是放射性有害物质进入环境的最后一道屏障，也是一条重要防线。黏土岩由于其低渗透性、渗透损伤自修复以及较强的吸附能力等特性，被认为是一种合理的高放废物处置地质屏障。结合比利时正开展的黏土岩高放废物地质处置相关研究课题，通过一系列室内试验研究黏土岩的水力耦合机制及长期蠕变特性。三轴压缩试验表明，黏土岩压缩强度、超孔隙水压力与围压正相关。渗透试验表明，黏土岩渗透性呈现显著的各向异性特征，围压增大使黏土岩渗透性显著降低。蠕变试验表明，黏土岩蠕变变形、蠕变变形速率与载荷密切相关，即：载荷越大，黏土岩蠕变变形越显著，蠕变变形速率达到稳定所需的时间越长，且相应的稳态蠕变速率越大；根据应力阈值和等时曲线法初步确定该黏土岩长期强度在1.0～1.2 MPa。研究结果将为我国未来黏土岩高放废物处置库的选址和安全性评估提供重要科学依据。

Abstract

For the geological disposal of high-level radioactive waste

the geological barrier system

as an important defense

is the last barrier for hazardous substances to enter the environment. Clayey rock

in virtue of its properties

such as low permeability

self-healing

and strong adsorption capacity

is considered a reasonable geological barrier for the disposal of high-level radioactive waste. In this study

the hydro-mechanical coupling mechanism and long-term rheological properties of a clayey rock were studied through a series of laboratory experiments. Triaxial tests show that the compression strength and excess pore water pressure have a positive relation with confining pressure. Permeability tests show the anisotropic hydraulic properties of the clayey rock and the permeability notably decreases under high confining pressure. Creep tests show that creep deformation and creep deformation rate are closely related to the load level. That is to say the larger the load is

the more significant the creep deformation is

the longer it takes for the creep deformation rate to reach stability

and the larger the corresponding steady-state creep rate is. According to the stress threshold and isochronal curve method

the long-term strength of the clayey rock is preliminarily determined to be 1.0-1.2 MPa. The results of this study will be of great significance to the geological disposal and safety assessment of high-level radioactive waste in clayey rock in China.

关键词

Keywords

references

Views

329

下载量

CSCD

Alert me when the article has been cited

提交

Tools

Publicity Resources

Experimental study of influence of excavation unloading on mechanical properties of sandstone

Breakage mechanics for geomaterials: Breakage mechanism of structural blocks and binary-medium model

Strengthening effect of total pile lateral friction by improving rock or soil strength at pile tip

Physico-mechanical characteristics of powdered soil of coal measure strata

Structure and hydro-mechanical coupled calculation model for rock mass

Related Author

WANG Yu

CHEN Xing

JIANG Yu-zhou

LI Jian-lin

WANG Rui-hong

LIU En-long

ZHANG Yang-song

GAO Guang-yun

Related Institution

Key Laboratory of Geotechnical Mechanics and Engineering of the Ministry of Water Resources, Yangtze River Scientific Research Institute

Key Laboratory of Geological Hazards on Three Gorges Reservoir Area of Ministry of Education, China Three Gorges University

School of Hydraulic and Hydropower Engineering, Sichuan University

Department of Civil Engineering, Nanjing University of Science and Technology

College of Civil Engineering, Tongji University

AI问答

⁰