冻土-桩动力相互作用模型试验系统研制
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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。
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.
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.
引文
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[2]崔托维奇H A.冻土力学[M].北京:科学出版社,1985.(ЦЫТОВНЧНА.Mechanics of frozen ground[M].Beijing:Science Press,1985.(in Chinese))
[3]VAZIRI H,HAN Y C.Full-scale field studies of the dynamicresponse of piles embedded in partially frozen soils[J].Canadian Geotechnical Journal,1991,28(5):708–718.
[4]SULEIMAN M T,SRITHARAN S,WHITE D J.Cyclic lateralload response of bridge column-foundation-soil systems infreezing conditions[J].Journal of Structural Engineering,2006,132(11):1745–1754.
[5]SRITHARAN S,SULEIMAN M T,WHITE D J.Effects ofseasonal freezing on bridge column-foundation-soilinteraction and their implications[J].Earthquake Spectra,2007,23(1):199–222.
[6]WOTHERSPOON L M,SRITHARAN S,PENDER M J.Modeling the response of cyclically loaded bridge columnsembedded in warm and seasonally frozen soils[J].Engineering Structures,2010,32(4):933–943.
[7]STELZER D L.Cyclic load effects on model pile behavior infrozen sand[D].Michigan:Michigan State University,1989.
[8]张建明,朱元林,张家懿.动荷载下冻土中模型桩的沉降试验研究[J].中国科学(D辑),1999,29(增刊1):27–33.(ZHANG Jian-ming,ZHU Yuan-lin,ZHANG Jia-yi.Experimental study on settlement of model piles in frozensoil under dynamic loading[J].Science in China(Series D),1999,29(S1):27–33.(in Chinese))
[9]吴志坚,王平,霍元坤,等.多年冻土区桥梁桩基础地震响应的模型振动试验研究[J].西北地震学报,2009,31(4):319–326.(WU Zhi-jian,WANG Ping,HUO Yuan-kun,et al.Study on shaking table test for seismic response of pilefoundation of bridges at the permafrost regions[J].NorthwestSeismological Journal,2009,31(4):319–326.(in Chinese))
[10]汪仁和,王伟,陈永锋.冻土中单桩抗压承载力模型试验研究[J].冰川冻土,2005,27(2):188–193.(WANGRen-he,WANG Wei,CHEN Yong-feng.Model experimentalstudy on compressive bearing capacity of single pile in frozensoil[J].Journal of Glaciology and Geocryology,2005,27(2):188–193.(in Chinese))
[11]程永锋,鲁先龙,刘华清,等.青藏铁路110kV输电线路冻土桩基模型试验研究[J].岩石力学与工程学报,2004,23(增刊1):4378–4382.(CHENG Yong-feng,LU Xian-long,LIU Hua-qing,et al.Model test study on pile foundation of110kV transmission line of Qinghai-Tibet Railway in frozensoils[J].Chinese Journal of Rock Mechanics and Engineering,2004,23(S1):4378–4382.(in Chinese))
[12]武芸.大比例土–桩基–框架模型动力相互作用试验模拟分析[D].长沙:湖南大学,2005.(WU Yun.Thesimulation and analysis of large scale soil-pile raftfoundation-frame model for dynamic interaction[D].Changsha:Hunan University,2005.(in Chinese))
[13]徐学祖,王家澄,张立新.冻土物理学[M].北京:科学出版社,2001.(XU Xue-zu,WANG Jia-cheng,ZHANG Li-xin.Physics of frozen soil[M].Beijing:Science Press,2001.(inChinese))
[14]陈肖柏,刘建坤,刘鸿绪,等.土的冻结作用与地基[M].北京:科学出版社,2006.(CHEN Xiao-bai,LIU Jian-kun,LIU Hong-xu,et al.Frost action of soil and foundationengineering[M].Beijing:Science Press,2006.(in Chinese))
[2]崔托维奇H A.冻土力学[M].北京:科学出版社,1985.(ЦЫТОВНЧНА.Mechanics of frozen ground[M].Beijing:Science Press,1985.(in Chinese))
[3]VAZIRI H,HAN Y C.Full-scale field studies of the dynamicresponse of piles embedded in partially frozen soils[J].Canadian Geotechnical Journal,1991,28(5):708–718.
[4]SULEIMAN M T,SRITHARAN S,WHITE D J.Cyclic lateralload response of bridge column-foundation-soil systems infreezing conditions[J].Journal of Structural Engineering,2006,132(11):1745–1754.
[5]SRITHARAN S,SULEIMAN M T,WHITE D J.Effects ofseasonal freezing on bridge column-foundation-soilinteraction and their implications[J].Earthquake Spectra,2007,23(1):199–222.
[6]WOTHERSPOON L M,SRITHARAN S,PENDER M J.Modeling the response of cyclically loaded bridge columnsembedded in warm and seasonally frozen soils[J].Engineering Structures,2010,32(4):933–943.
[7]STELZER D L.Cyclic load effects on model pile behavior infrozen sand[D].Michigan:Michigan State University,1989.
[8]张建明,朱元林,张家懿.动荷载下冻土中模型桩的沉降试验研究[J].中国科学(D辑),1999,29(增刊1):27–33.(ZHANG Jian-ming,ZHU Yuan-lin,ZHANG Jia-yi.Experimental study on settlement of model piles in frozensoil under dynamic loading[J].Science in China(Series D),1999,29(S1):27–33.(in Chinese))
[9]吴志坚,王平,霍元坤,等.多年冻土区桥梁桩基础地震响应的模型振动试验研究[J].西北地震学报,2009,31(4):319–326.(WU Zhi-jian,WANG Ping,HUO Yuan-kun,et al.Study on shaking table test for seismic response of pilefoundation of bridges at the permafrost regions[J].NorthwestSeismological Journal,2009,31(4):319–326.(in Chinese))
[10]汪仁和,王伟,陈永锋.冻土中单桩抗压承载力模型试验研究[J].冰川冻土,2005,27(2):188–193.(WANGRen-he,WANG Wei,CHEN Yong-feng.Model experimentalstudy on compressive bearing capacity of single pile in frozensoil[J].Journal of Glaciology and Geocryology,2005,27(2):188–193.(in Chinese))
[11]程永锋,鲁先龙,刘华清,等.青藏铁路110kV输电线路冻土桩基模型试验研究[J].岩石力学与工程学报,2004,23(增刊1):4378–4382.(CHENG Yong-feng,LU Xian-long,LIU Hua-qing,et al.Model test study on pile foundation of110kV transmission line of Qinghai-Tibet Railway in frozensoils[J].Chinese Journal of Rock Mechanics and Engineering,2004,23(S1):4378–4382.(in Chinese))
[12]武芸.大比例土–桩基–框架模型动力相互作用试验模拟分析[D].长沙:湖南大学,2005.(WU Yun.Thesimulation and analysis of large scale soil-pile raftfoundation-frame model for dynamic interaction[D].Changsha:Hunan University,2005.(in Chinese))
[13]徐学祖,王家澄,张立新.冻土物理学[M].北京:科学出版社,2001.(XU Xue-zu,WANG Jia-cheng,ZHANG Li-xin.Physics of frozen soil[M].Beijing:Science Press,2001.(inChinese))
[14]陈肖柏,刘建坤,刘鸿绪,等.土的冻结作用与地基[M].北京:科学出版社,2006.(CHEN Xiao-bai,LIU Jian-kun,LIU Hong-xu,et al.Frost action of soil and foundationengineering[M].Beijing:Science Press,2006.(in Chinese))
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