深土力学特性研究现状及发展展望  

Status quo and prospects of the deep soil mechanical properties

作　　者：周国庆[1] 况联飞[1] 马金荣[1] 商翔宇[1] 赵晓东[1] 

机构地区：[1]中国矿业大学深部岩土力学与地下工程国家重点实验室,江苏徐州221116

出　　处：《中国矿业大学学报》2016年第2期195-204,共10页Journal of China University of Mining & Technology

基　　金：国家重点基础研究发展计划"973"项目(2012CB026103);国家高技术研究发展计划"863"项目(2012AA06A401);国家自然科学基金项目(41271096;51504245);江苏省博士后基金项目(1402009B)

摘　　要：以矿山建设为代表的深部地下工程的大量开建,促使深土力学这一基础理论学科得到了进一步地发展.本文从深土物理性质特性、加载路径力学特性和K0及卸载路径力学特性3方面对目前深土力学特性的相关研究现状进行了综述,指出黏土高压宏观力学响应已得到表观披露但其微观控制机理阐述存在不足.通过微观分子模拟获得层间结合水特性,介观尺度黏土单一晶片物理力学特性模拟,以及考虑短程水化斥力对双电层理论进行修正,揭露控制深土高压力学特性的基本机制在于层间结合水的部分脱附和小间距条件下短程水化斥力的发挥.从试验研究、多尺度数值模拟以及理论分析3方面对深土高压力学特性的研究前景进行了展望.The deep underground construction in China has recently stepped into a new stage,especially represented by deep mine construction engineering,which promotes the development of deep soil mechanics as a basic disciplines.Based on the reviews of the research status about deep soil physical and mechanical properties under the path of loading and unloading,it is found that these properties have been revealed in general in the past,but not the governing mechanisms.By employing molecular simulations in micro-and-meso-scale,and taking into account the short-range hydration repulsion to modify the traditional diffusion double layer theory,a systematic studies are conducted to investigate the basic mechanisms of high stress mechanical properties for saturated clay,that the partially dehydrated of bound water and the hydration repulsion plays at short distance govern the basic mechanism of high stress compression for saturated clay.The deep soil mechanical properties is prospected from experimental research,multiscale numerical simulation and theoretical analysis.

关 键 词：深土 力学特性 分子模拟 水化斥力 多尺度 

分 类 号：TU43[建筑科学—岩土工程]