土石混合体细观特性研究现状及展望  

RESEARCH STATUS AND PROSPECT OF ROCK AND SOIL AGGREGATE

作　　者：王宇[1,2] 李晓[1] 赫建明[1] 武艳芳[1] 吴雨松[1,2] 

机构地区：[1]中国科学院地质与地球物理研究所工程地质力学重点实验室,北京100029 [2]中国科学院大学,北京100049

出　　处：《工程地质学报》2014年第1期112-123,共12页Journal of Engineering Geology

基　　金：国家重点基础研究发展973计划项目(2010CB731501);国家自然科学基金项目(41227901;41272352;41202217)资助

摘　　要：土石混合体作为一种介于土体与破碎岩体之间的特殊地质材料越来越多地受到工程界及学术界的关注。土石混合体细观结构特性及物理力学特性的深入研究是当今工程建设的需要,也是理论岩土力学、计算岩土力学、试验岩土力学及应用岩土力学发展的必然。在总结国内外有关土石混合体研究现状的基础上,分别从土石混合体的细观结构特征、细观结构模型和细观力学特性3个方面对当前的研究成果进行了概括。在此基础上,总结了土石混合体细观特性研究方面存在的不足,指出开展不同细观尺度的实时加载试验,从不同试验尺度上研究土石混合体的局部变形特征是未来的研究方向;建立土石混合体细观损伤演化方程和本构方程,加强土石混合体环境依赖性方面的研究,通过细观试验建立土石混合体三维精细结构模型,开展土石混合体开裂方面的仿真计算,加强细宏观力学特征的关系性分析,揭示实时加载条件下内部微结构的演化过程是未来研究的趋势。Rock and soil aggregate （RSA） is a special kind of geological materials, which is different from soil and fi＇actured rock mass. Recently, RSA is drawn more and more attention from engineering and academia circles. Deep research on the meso-structure, physical and mechanical properties of RSA is not only the need of the engineering construction, but also the inevitable result of them-y, rock and soil mechanics, calculation of geotechnical mechanics, experimental rock and soil mechanics. Based on the current research for RSA about mesoscopic characteristic home and abroad, the research status of RSA is summarized in term of meso-structure characteristics, meso-structure model and the meso-mechanics characteristic. On the basis of this, shortcomings of meso-scale characteristic research are summarized, point out that canying out different meso-scale real-time loading tests to analysis local deformation characteristics for RSA is the future direction. The trends of the future reserch include establishing meso-scale damage evolution equation and the constitutive equation, strengthening research about environment-dependence of RSA, and establishment full-field structure model on meso-scale tests revealing the microstructure evolution under real-time loading condition.

关 键 词：土石混合体 细观特性 细观试验 力学特性 发展趋势 

分 类 号：TU41[建筑科学—岩土工程]