Numerical analysis of thermo-hydro-mechanical coupling in excavation and after closure for near field of conceptual nuclear waste repository

ZHANG Yu-jun

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Numerical analysis of thermo-hydro-mechanical coupling in excavation and after closure for near field of conceptual nuclear waste repository

更新时间：2026-06-25

- Numerical analysis of thermo-hydro-mechanical coupling in excavation and after closure for near field of conceptual nuclear waste repository
- Vol. 28, Issue 10, (2007)
- 作者机构：
  
  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,武汉,430071
- 作者简介：
- 基金信息：
- DOI：
  CLC： TB115
- Online First：15 October 2013，
  
  Published：2007
- 稿件说明：
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ZHANG Yu-jun. Numerical analysis of thermo-hydro-mechanical coupling in excavation and after closure for near field of conceptual nuclear waste repository[J]. 2007, 28(10).
DOI：

ZHANG Yu-jun. Numerical analysis of thermo-hydro-mechanical coupling in excavation and after closure for near field of conceptual nuclear waste repository[J]. 2007, 28(10). DOI：

摘要

考虑了缓冲层中温度梯度水分扩散、水蒸汽扩散对水连续性及能量守恒的影响，进一步完善了饱和-非饱和介质中热-水-应力耦合现象的控制方程。应用缓冲材料的实验资料，对核废料处置概念库开挖及封闭后近场的热-水-应力耦合过程进行了数值模拟，以考察围岩中的位移、塑性区、主应力、孔隙水压力和温度的分布及变化。认为开挖是引起洞室围岩中的变形及应力重新分布的主要原因，但坑道封闭后的热-水-应力耦合过程对变形及应力状态也产生了明显的影响。

Abstract

considering especially the influence of the thermal water diffusivity and the isothermal vapor diffusivity on the continuity of water and the energy balance

the author improved further the established control equations for analyzing coupled thermo-hydro- mechanical phenomena in saturated-unsaturated porous media. Using the experiment data of the buffer material and the 2D FEM code developed by the author

a numerical simulation for the coupled thermo-hydro-mechanical processes in near field of a conceptual nuclear waste repository in excavation and after closure is carried out; and the distributions and the changes of the displacements

plastic zones

principal stresses

pore pressures and temperatures in the surrounding rockmass are investigated. The computation results show that the excavation is the main reason for the displacements and redistributions of stress in surrounding rockmass of a cavern; and the coupled thermo-hydro-mechanical processes after the cavern closure also produce obvious influence on the displacements and stress states in the rockmass.

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Related Institution

Institute of Rock and Soil Mechanics, Chinese Academy of Sciences

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Research Center of Coastal and Urban Geotechnical Engineering, Zhejiang University

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