【摘要】 桩基础是冻土区大型结构物的主要基础型式,但目前学者对冻土环境中桩基动力特性的研究甚少。在比较分析国内外在该领域研究现状的基础上,设计了一套冻土-桩动力相互作用模型试验系统,主要包括动力加载系统性能参数的确定与设计、模型试验箱的设计与制冷效果分析、加载工作架的设计及其与试验箱的拼接等。试验结果表明,所设计的试验系统能为试验提供所需的冻土环境,结构牢固,能较好地模拟分析冻土-桩动力性能,此外该试验系统还可应用于其他冻土问题的试验研究。更多还原

【Abstract】 The pile foundation is the main foundation form for large-scale structures in frozen zones,but there are little researches on its dynamic characters in frozen soils.By comparing and analyzing the current researches in this field,a set of model test system for dynamic frozen soil-pile interaction is developed.It mainly includes determination of performance parameters,design of dynamic loading system,design of model test chamber,analysis of refrigeration effect,design of loading frame and connection with experimental chamber.The test results show that the test system can supply frozen soil environment for experiments,and simulate and analyze the dynamic behaviors of frozen soil-pile preferably.Moreover,the system can be used in other researches on frozen soils.更多还原