尤卡山坑道规模试验T-H-M耦合过程数值模拟  

Coupled Thermo-Hydro-Mechanical Analysis for Yucca Mountain Drift Scale Test by Numerial Sirnulation

作　　者：张玉军[1] 

机构地区：[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,武汉430071

出　　处：《地下空间与工程学报》2009年第1期13-17,34,共6页Chinese Journal of Underground Space and Engineering

基　　金：国家自然科学基金项目(50578171)

摘　　要：简述了笔者建立的求解热—水—应力耦合问题的数学模型,针对美国尤卡山高放射性核废料地质处置坑道规模试验使用笔者研制的有限元程序进行了热—气—应力耦合过程的数值模拟,分析了坑道周边的位移、温度及气压力的变化;并将该计算的部分结果和实测数据及国外有限元/有限差分方法的成果作了比较,看到三者温度的分布与变化较为接近,位移分布与LBNL的结果在定性和定量上有某种一致性,位移随时间的变化与实测结果的规律性大体相当。从而可以认为使用该模型和有限元程序对核废料地质处置中的热—水/气—应力耦合过程进行模拟是可行的。This paper presents a mathematical model established by the author for solving thermo-hydro-mechanical coupling problem. Against the coupled T-H-M processes （here H is non-wetting fluid） in near field of the Drift Scale Test for geological disposal of high-level radioactive nuclear waste at Yucca Mountain, Nevada, USA, a numerical simulation is carried out by using a FEM code developed by the author. The changes of displacements, temperatures and gas pressures are analyzed. Some calculation results are compared with in-situ measured data and other resuits ohtained by finite element and/or finite difference methods. It is shown： the distributions and changes of temperatures are close to each other for the three results; the displacement distributions by FEM approach those of LBNL analysis qualitatively and quantitatively, and the changes of displacements with time obtained by the FEM code and the relative in-situ measured data are match on the whole. So it can be considered that the simulation of coupled T-H-M processes in geological disposal of nuclear waste by the FEM code is practicable .

关 键 词：热-水-应力耦合 有限元方法 尤卡山 坑道规模试验 数值模拟 

分 类 号：TU470.1[建筑科学—结构工程]