人工冻土动态力学特性研究现状及意义

Research status of dynamic properties of artificial frozen soil and its significance

冻土的动态力学特性研究是冻土静力学研究的发展和分析冻土体动力失稳等特征的重要基础。综述了国内外研究现状可知,冻土力学特性的研究集中在冻土的静态力学方面,动态力学性能研究大多是低频或小幅值的振动加载下的情况。根据应变率大小,采用分离式Hopkinson压杆装置研究冻土的高应变率下的冻土动态力学特性是可行的。冻土动态力学性能的研究是煤矿冻结法施工及人工冻结工程建设中安全有效快速施工的重要基础研究,具有重要的理论意义和工程应用前景。

The research for dynamic properties of frozen soil is the development of statics,and it is the important basis of analyzing dynamic instability.The research status for mechanical properties of frozen soil at home and abroad is summarized.Static properties of frozen soil are mostly researched,dynamic properties of frozen soil focus on the low frequency or small amplitude vibration tests.According to the magnitude of strain rate,the dynamic mechanical properties of frozen soil are researched by adopting split Hopkinson pressure bar test under high strain rate.It is an important research for the safe,effective and rapid construction in frozen construction of coal mine and artificially frozen engineering,and it is of great significance both in research and application.