循环荷载下冻土变形特性研究现状及冻土开挖问题

Research state of deformation characteristics of frozen soil under cyclic loading and problems in frozen soil excavation

讨论了循环荷载作用下冻土的变形特性,总结了前人对冻土变形特性的研究成果。重点阐述了影响冻土变形特性的主要因素,包括土质、含水量、含冰量、温度、围压、动应力振幅和频率对冻土变形特性的影响及其研究现状和主要结论。简要论述了冻土开挖方面的研究情况,并强调了冻土机械开挖方法的重要性。最后针对高效开挖冻土的实际需求,提出了进行冻土变形特性进一步研究的几点建议。

The deformation characteristics of frozen soil under cyclic loading are discussed, with the research achievements of predecessors on the deformation properties of frozen soil. The state of research and main conclusions on the impacts of the main factors, such as soil type, moisture content, ice content, temperature, confining pressure, amplitude and frequency of cyclic loading, are deeply studied. The importance of mechanical excavation method of frozen soil is stressed after a brief discussion of the present of the excavation practices in frozen soil. At last, some suggestions are presented for further studies on the deformation characteristics of frozen soil, aiming at improving the efficiency of frozen soil excavation.