摘要
从建立应力平衡方程、水连续性方程、能量守恒方程和弹塑性矩阵入手,提出了一个饱和—非饱和孔隙介质中的热—水—应力耦合模型和开发了相应的有限元程序。为验证本耦合模型及程序的可靠性和重点探讨不同场的热—水—应力耦合过程,以高放射性核废料地质处置的Prototype Repository Project(PRP)原位试验为模拟对象,对一个处置试验坑道近场进行了水单场、热—水耦合、水—应力耦合、热—应力耦合和热—水—应力耦合条件下的数值分析,考察了工程屏障及围岩中的温度、饱和度及应力的变化、分布情况,并得出了一定的认识。
In this paper, through establishing the momentum equilibrium equation, the continuity equation for water, the energy balance equation and the elastoplastic matrix , one coupled thermo - hydro - mechanical model and the relative 2D FEM code for saturated - unsaturated porous media were developed. In order to validate the coupling model and the code and study mainly the coupled thermo - hydro - mechanical processes with different fields, taking the Prototype Repository Project （ PRP） in - situ test for geological disposal of high level radioactive nuclear waste as the modeling object, the numerical analyses for the hydraulic field, thermo -hydraulic coupling, hydro- mechanical coupling, thermo - mechanical coupling and thermo - hydro - mechanical coupling in near field of a test drift were carried out , and the changes and distributions of temperature, saturation and stresses in the engineered barrier and surrounding rock mass were investigated. Finally, some conclusions have been obtained.
出处
《地下空间与工程学报》
CSCD
2007年第3期444-449,共6页
Chinese Journal of Underground Space and Engineering
基金
国家自然科学基金项目(50578171)
国家自然科学基金重点项目(50239070)联合资助
