泥岩各向异性热-水-力耦合特性 ——基于ATLAS III现场加热试验

doi:10.16285/j.rsm.2016.0371

›› 2018, Vol. 39 ›› Issue (2): 426-436.doi: 10.16285/j.rsm.2016.0371

泥岩各向异性热-水-力耦合特性 ——基于ATLAS III现场加热试验

马永尚¹，陈卫忠^{1, 2}，龚哲³，于洪丹¹，李翻翻¹，李香玲⁴

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. 山东大学岩土与结构工程研究中心，山东济南 250061；3. 武汉市政工程设计研究院有限责任公司，湖北武汉 430023； 4. 比利时核废物泥岩处置研究中心，比利时摩尔 2400

收稿日期:2016-04-14 出版日期:2018-02-10 发布日期:2018-06-06
作者简介:马永尚，男，1990年生，博士研究生，主要从事软岩多场耦合长期力学性质的研究。
基金资助:
国家杰出青年基金项目（No. 51225902）；国家自然科学基金资助项目（No. 51479190）；国家重点基础研究发展计划（973计划）（No. 2013CB036006）。

Coupled thermo-hydro-mechanical anisotropy characteristics of clay—Based on the ATLAS III in situ heating test

MA Yong-shang¹, CHEN Wei-zhong^{1, 2}, GONG Zhe³, YU Hong-dan¹, LI Fan-fan¹, LI Xiang-ling⁴

1. State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan, Hubei 430071, China; 2. Geotechnical and Structural Engineering Research Center, Shandong University, Jinan, Shandong 250061, China; 3. Wuhan Municipal Engineering Design & Research Institute Co., Ltd., Wuhan, Hubei 430023, China; 4. Belgian Nuclear Research Centre, Mol 2400, Belgium

Received:2016-04-14 Online:2018-02-10 Published:2018-06-06
Supported by:
This work was supported by the National Science Foundation for Distinguished Young Scholars (51225902), the National Natural Science Foundation of China(51479190) and the National Program on Key Basic Research Project of China (973 Program) (2013CB036006).

摘要/Abstract

摘要： 比利时放射性核废料地质备选场址Boom clay是一种典型的横观各向同性材料，在Drucker-Prager帽盖模型的基础上，构建了适用于Boom clay的横观各向同性特点的热-水-力耦合弹塑性本构模型，该模型可反映温度对其强度、弹性模量、渗透性等的影响，并在ABAQUS中进行了二次开发。为验证所建立模型的合理性，结合比利时HADES地下实验室ATLAS III现场加热试验结果，应用所提出的模型对加热过程中围岩的温度和孔隙水压力的变化规律进行了数值仿真分析。结果表明：所建立的模型能够正确地描述现场加热试验过程中围岩温度场和孔压场所呈现出的各向异性特征，主要表现为热源水平面内测点的孔压在加热功率升高时先略为下降后才升高，在加热功率下降时先略为升高后才下降，而竖直面内测点的孔压在加热功率升高时立即升高，在加热功率下降时立即下降。研究成果表明，考虑各向异性的THM耦合分析能更好地反映加热过程中泥岩温度场和孔压场的实际分布情况，研究结果对类似工程或现场试验的设计、安全运行提供重要的决策依据。

关键词: Boom clay, 热-水-力耦合, Drucker-Prager帽盖模型, 损伤, ATLAS Ⅲ现场加热试验

Abstract: Boom clay, as a study case for the potential geological disposal of high-level and long-lived radioactive waste in Belgium, can be considered as a transversely isotropic geomaterial. This paper presents a coupled thermo-hydro-mechanical (THM) elasto-plastic damage model which is based on the Drucker-Prager cap model. The model is able to reflect thermal effect on the strength, elastic modulus and permeability of Boom clay. The developed model was implemented in ABAQUS finite element code through subroutine USDFLD. Three dimensional numerical simulation analysis was conducted of the ATLAS III in-situ heating tests at the HADES underground research facility to validate the proposed constitutive model. The results of the numerical simulation are compared with in situ measurements in which the coupled THM properties of Boom clay were analyzed. It indicates that the model can reasonably depict the main features of coupled THM anisotropy behaviors of temperature and pore water pressure. Remarkably anisotropic characteristics were found on temperature and pore water pressure changes of Boom clay with thermal load. The pore pressure in the horizontal plan shows temporary decrease and then increase after increasing power, and temporary increase and then decrease after decreasing power. The pore pressure in the vertical plan shows immediate increase after increasing power and immediate decrease after decreasing power. This study shows that the anisotropic coupled THM elasto-plastic damage model can accurately reproduce the temperature and pore water pressure changes during the heating test. The results of this study can provide valuable information for the design and operation of similar engineering/in situ tests.

Key words: Boom clay, thermo-hydro-mechanical coupling, Drucker-Prager cap model, damage, ATLAS Ⅲ heating test

中图分类号:

TL 941

马永尚，陈卫忠，龚哲，于洪丹，李翻翻，李香玲，. 泥岩各向异性热-水-力耦合特性 ——基于ATLAS III现场加热试验[J]. , 2018, 39(2): 426-436.

MA Yong-shang, CHEN Wei-zhong, GONG Zhe, YU Hong-dan, LI Fan-fan, LI Xiang-ling，. Coupled thermo-hydro-mechanical anisotropy characteristics of clay—Based on the ATLAS III in situ heating test[J]. , 2018, 39(2): 426-436.

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泥岩各向异性热-水-力耦合特性 ——基于ATLAS III现场加热试验

Coupled thermo-hydro-mechanical anisotropy characteristics of clay—Based on the ATLAS III in situ heating test

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