季节冻土区压实黄土湿陷特性研究进展与展望

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.

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

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 freezing-thawing 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. Meantime, 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.