季节冻土区压实黄土湿陷特性研究进展与展望  

Progress and prospects of the research on collapsibility of compacted loess in seasonally frozen ground regions

作　　者：李国玉[1] 马巍[1] 穆彦虎[1] 毛云程[1,2] 陈赵育 王飞[1] 房建宏 

机构地区：[1]中国科学院寒区旱区环境与工程研究所冻土工程国家重点实验室,甘肃兰州730000 [2]甘肃省交通科学研究院有限公司,甘肃兰州730050 [3]中国科学院大学,北京100049 [4]青海省交通科学研究院,青海西宁810008

出　　处：《冰川冻土》2014年第4期934-943,共10页Journal of Glaciology and Geocryology

基　　金：国家重点基础研究发展计划(973计划)项目(2012CB026106);甘肃省科技重大专项计划项目(143GKDA007);国家自然科学基金创新群体项目(41121061);中国科学院"西部之光"重点项目;冻土工程国家重点实验室自主课题(SKLFSE-ZY-11;SKLFSE-ZT-16)资助

摘　　要：随着国家西部大开发的深入发展,国家重点基础工程向西部季节冻土区和湿陷性黄土地区推进,工程面临的黄土湿陷性问题和冻融灾害问题已成为研究和设计人员关注的焦点.基于前期的研究基础,分析和总结了压实黄土湿陷机理、本构模型和强度理论、工程特性、干湿和冻融循环以及盐分对压实黄土工程特性的影响等方面的研究现状,提出季节冻土区黄土工程面临的问题和研究展望,为完善黄土地基湿陷机理解释和深化黄土力学与工程等研究提供新思路和新方法.With development in western China, some national key projects will be built in seasonally frozen ground regions and collapsible loess areas in western China. Engineering problems associated with freezingthawing and loess collapsibility have become concerns by researcher and designer. Based on the previous studies, loess collapse mechanism, constitutive model, strength theory, engineering properties, impacts of freezing- thawing and wet-dry cycles and salt on engineering properties are analyzed and summarized in this paper. Mean- time, some ongoing engineering problems and prospects are put forward in seasonally frozen ground regions and in loess areas, which provide new ideas and methods for improving the interpretation of collapsing mechanisms of loess subgrade and for expanding investigation on loess mechanics.

关 键 词：黄土路基 冻融循环 干湿循环 宏观和微观结构 黄土湿陷性 盐渍土 

分 类 号：P642.131[天文地球—工程地质学]