含盐冻土物理力学性质研究现状与进展

综述和评价了含盐冻土物理力学性质研究的文献和进展，包括冻融过程中水盐迁移机理、冻胀机理、盐渍冻土物理力学参数和冻融循环对含盐土力学性质影响等方面的研究，总结归纳了含盐土研究的主要结论和目前存在的问题，在此基础上提出了冻融过程中含盐冻土物理力学性质研究的重点，如水盐迁移、冻胀-盐胀机理和盐渍化冻土结构性等. 鉴于对含盐土研究中所存在的问题，今后应从以下方面着手深入研究：将室外试验纳入到含盐土物理力学性质的研究中，对含盐土研究中试验样品尽量以原状土代替，以野外试验研究补充完善室内试验；应用定量研究含盐土的微观结构和孔隙特征来描述土体的宏观物理力学性质，通过不同试验方法结合寻求更加适合土壤微结构图像处理的新方法；对仪器设备改进，采取合理有效的方法加强盐渍化冻土水盐运移参数试验.

Study of the Physical and Mechanical Properties of Saline Frozen Soil: Research Status and Progress

Study of the physical and mechanical properties of saline soil has practical significance for solving salt expansion and frost heave damage problems in engineering. In this paper, a general overview about new research progress is presented in mechanisms of salt expansion, water and salt transfer and influence of freeze-thaw cycles on mechanical properties of saline frozen soil at home and abroad. The main findings and the current problems about salinity frozen soil in these aspects have been summed up. Researching priorities of physical and mechanical properties of saline frozen soil under freeze-thaw cycles, for example, the water and salt transfer, mechanism of salt expansion and the structure of saline frozen soil, are put forward so as to have a better service for engineering construction. The feasible study directions in the future are proposed.