辽西风积土动应力试验研究
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摘要
通过对辽西地区风积土动三轴试验,研究了动荷载作用下辽西风积土的动强度特性和抗液化特性.通过控制不同的动荷幅值、固结比和固结围压等试验条件,获得了抗震设防烈度为7度时,辽西风积土的动应力值和抗液化剪应力比.利用Excel软件,对试验数据进行回归处理,得到了该土试样的动应力与固结比和固结围压两种因素的经验关系式.试验和回归分析结果表明,风积土的动应力与固结比和固结围压成正比.试验研究了不同固结比条件下辽西地区风积土的液化强度特性,获得了不同固结比条件下的抗液化剪应力比.试验结果表明,风积土的抗液化剪应力随着固结比的增加而增大.上述试验结果对于辽西地区工程的抗震设计具有重要的指导意义和工程实用价值.
Dynamic properties and liquefaction characteristics under dynamic loads of Aeolian soil in the west of Liaoning province were studied through dynamic triaxial tests.The dynamic strength of Aeolian soil was determined when the seismic fortification intensity is 7 degree under different test control conditions,including dynamic amplitudes,consolidation ratio and consolidation pressure.The empirical formulas relating dynamic strength to consolidation ratio and consolidation pressure were obtained by the regression analysis of the experimental data by using Excel.Tests and regression analysis results show that dynamic strength of Aeolian soil is proportional to the confining pressure and the consolidation ratio.The soils’ liquefaction strength was also studied.Liquefaction shear stress ratios under different consolidation ratios were obtained.Test results show that the liquefaction shear stress ratio is proportional to the consolidation ratio.The test results provide some practical guidance for the projects in west of Liaoning province
Dynamic properties and liquefaction characteristics under dynamic loads of Aeolian soil in the west of Liaoning province were studied through dynamic triaxial tests.The dynamic strength of Aeolian soil was determined when the seismic fortification intensity is 7 degree under different test control conditions,including dynamic amplitudes,consolidation ratio and consolidation pressure.The empirical formulas relating dynamic strength to consolidation ratio and consolidation pressure were obtained by the regression analysis of the experimental data by using Excel.Tests and regression analysis results show that dynamic strength of Aeolian soil is proportional to the confining pressure and the consolidation ratio.The soils’ liquefaction strength was also studied.Liquefaction shear stress ratios under different consolidation ratios were obtained.Test results show that the liquefaction shear stress ratio is proportional to the consolidation ratio.The test results provide some practical guidance for the projects in west of Liaoning province
引文
1 Huang WX.Investigation on stability of saturated sandfoundations and slopes against Liquefaction.In:Proceed-ings of the fifth International Conference of Soil Mechanicsand Foundation Engineering,1961.629-631
2谢定义.饱和砂土体液化的若干问题.岩土工程学报,1992,14(3):90-97(Xie Dingyi.Saturated sand body liquefac-tion problems.Chinese Journal of Geotechnical Engineer-ing,1992,14(3):90-97(in Chinese))
3陈存礼,杨鹏,何军芳.饱和击实黄土的动力特性研究.岩土力学,2007,28(8):1551-1556(Chen Cunli,Yang Peng,HeJunfang.Research on dynamic characteristics of saturatedcompacted loess.Rock and Soil Mechanics,2007,28(8):1551-1556(in Chinese))
4王峻,王兰民,李兰.黄土场地震陷量的试验预测.西北地震学报,1997,19(2):62-66(Wang Jun,Wang Lanmin,LiLan.Laboratory prediction of seismic subsidence quantityon loess sites.Northwestern Seismological Journal,1997,19(2):62-66(in Chinese))
5王兰民,石玉成,刘旭等.黄土动力学.北京:地震出版社,2003
6谷天峰,王家鼎,王峻.郑西客运专线黄土路基震陷研究.工程地质学报,2009,17(4):557-562(Gu Tianfeng,Wang Jiad-ing,Wang Jun.Laboratory and numeri cal stud ies onseismic subsidence of loess subgrade along zhengzhou-xi’anhigh-speed railway.Journal of Engineering Geology,2009,17(4):557-562(in Chinese))
7张向东,刘功勋,于崇等.辽西地区风积土结构特性试验研究.岩土力学,2008,29(3):691-695(Zhang Xiangdong,Liu Gongxun,Yu Chong,et al.Testing study on struc-tural character of aeolian soil in western area of LiaoningProvince.Rock and Soil Mechanics,2008,29(3):691-695(in Chinese))
8张树光,孙杨,张向东.动荷载作用下辽西冻风积土的损伤演化分析.见:第一届中国水利水电岩土力学与工程学术讨论会论文集,2006.902-904
9张向东,冯胜洋,王长江.辽西风积土动力特性试验研究.力学与实践,2011,33(1):48-53(Zhang Xiangdong,FengShengyang,Wang Changjiang.Experimental study ondynamic characteristics of aeolian soil in west liaoningprovince.Mechanics in Engineering,2011,33(1):48-53(in Chinese))
10张向东,冯胜洋,潘宇.二灰改良风积土动力特性试验研究.中国地质灾害防治学报,2010,21(2):89-94(Zhang Xiang-dong,Feng Shengyang,Pang Yu.Testing study on dy-namic performance of lime-flyash-improved Aeolian soil.The Chinese Journal of Geological Hazard and Control,2010,21(2):89-94(in Chinese))
11TB10102-2004,铁路工程土工试验规程.中华人民共和国行业标准,2004
12谢定义.土动力学.西安:西安交通大学出版社,1988
13GB500011-2010.建筑抗震设计规范.中华人民共和国国家标准,2010
14 Seed HB,Idriss IM.Simplified procedure for evaluation soilliquefaction potential.Soil Mech Found Div,ASCE,1971,97(SM9):1249-1273
2谢定义.饱和砂土体液化的若干问题.岩土工程学报,1992,14(3):90-97(Xie Dingyi.Saturated sand body liquefac-tion problems.Chinese Journal of Geotechnical Engineer-ing,1992,14(3):90-97(in Chinese))
3陈存礼,杨鹏,何军芳.饱和击实黄土的动力特性研究.岩土力学,2007,28(8):1551-1556(Chen Cunli,Yang Peng,HeJunfang.Research on dynamic characteristics of saturatedcompacted loess.Rock and Soil Mechanics,2007,28(8):1551-1556(in Chinese))
4王峻,王兰民,李兰.黄土场地震陷量的试验预测.西北地震学报,1997,19(2):62-66(Wang Jun,Wang Lanmin,LiLan.Laboratory prediction of seismic subsidence quantityon loess sites.Northwestern Seismological Journal,1997,19(2):62-66(in Chinese))
5王兰民,石玉成,刘旭等.黄土动力学.北京:地震出版社,2003
6谷天峰,王家鼎,王峻.郑西客运专线黄土路基震陷研究.工程地质学报,2009,17(4):557-562(Gu Tianfeng,Wang Jiad-ing,Wang Jun.Laboratory and numeri cal stud ies onseismic subsidence of loess subgrade along zhengzhou-xi’anhigh-speed railway.Journal of Engineering Geology,2009,17(4):557-562(in Chinese))
7张向东,刘功勋,于崇等.辽西地区风积土结构特性试验研究.岩土力学,2008,29(3):691-695(Zhang Xiangdong,Liu Gongxun,Yu Chong,et al.Testing study on struc-tural character of aeolian soil in western area of LiaoningProvince.Rock and Soil Mechanics,2008,29(3):691-695(in Chinese))
8张树光,孙杨,张向东.动荷载作用下辽西冻风积土的损伤演化分析.见:第一届中国水利水电岩土力学与工程学术讨论会论文集,2006.902-904
9张向东,冯胜洋,王长江.辽西风积土动力特性试验研究.力学与实践,2011,33(1):48-53(Zhang Xiangdong,FengShengyang,Wang Changjiang.Experimental study ondynamic characteristics of aeolian soil in west liaoningprovince.Mechanics in Engineering,2011,33(1):48-53(in Chinese))
10张向东,冯胜洋,潘宇.二灰改良风积土动力特性试验研究.中国地质灾害防治学报,2010,21(2):89-94(Zhang Xiang-dong,Feng Shengyang,Pang Yu.Testing study on dy-namic performance of lime-flyash-improved Aeolian soil.The Chinese Journal of Geological Hazard and Control,2010,21(2):89-94(in Chinese))
11TB10102-2004,铁路工程土工试验规程.中华人民共和国行业标准,2004
12谢定义.土动力学.西安:西安交通大学出版社,1988
13GB500011-2010.建筑抗震设计规范.中华人民共和国国家标准,2010
14 Seed HB,Idriss IM.Simplified procedure for evaluation soilliquefaction potential.Soil Mech Found Div,ASCE,1971,97(SM9):1249-1273
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