剪切波速判别方法对黄土液化判别适用性研究
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摘要
最近的研究结果表明饱和黄土甚至高含水率的黄土也具有很高的液化势和流态破坏势,而工程设计时关于黄土液化的判别,尚无统一标准,亦无经验可循。用Seed-Idriss简化判别法对兰州某民用机场的饱和黄土和砂土进行了液化判别,并以此结果为依据检验了现有剪切波速判别式对黄土液化判别的适用性。结论显示该场地的黄土剪切波速值过大,《岩土工程勘察规范》与Andrus和Stokoe剪应力比法都不适用。
Recent studies show that saturated loess,even loess with high moisture content,also have a high liquefaction potential and flow pattern damage potential.But for evaluating liquefaction resistance of loess in engineering design,there is no uniform standards,and no experience to follow.Seed's simplified procedure was used to discriminate liquefaction of saturated loess and sand of a civil airport in Lanzhou in this paper,and applicability of method for liquefaction discrimination based on shear wave velocity for loess was be tested.The results show that the shear wave velocity of this loess site is too large,the method for discriminating liquefaction in Chinese geotechnical code and Andrus-Stokoe's shear stress ratio method are all not applicable to loess.
Recent studies show that saturated loess,even loess with high moisture content,also have a high liquefaction potential and flow pattern damage potential.But for evaluating liquefaction resistance of loess in engineering design,there is no uniform standards,and no experience to follow.Seed's simplified procedure was used to discriminate liquefaction of saturated loess and sand of a civil airport in Lanzhou in this paper,and applicability of method for liquefaction discrimination based on shear wave velocity for loess was be tested.The results show that the shear wave velocity of this loess site is too large,the method for discriminating liquefaction in Chinese geotechnical code and Andrus-Stokoe's shear stress ratio method are all not applicable to loess.
引文
[1]石兆吉,王兰民.土壤动力特性.液化势及危害性评价[M].北京:地震出版社,1999.Shi Zhaoji,Wang Lanmin.Dynamic characteristics of soil,liquefaction potential and hazard evaluation[M].Beijing:Seismic Press,1999.
[2]王峻,王兰民,李兰.黄土场地地震液化研究[J].地震研究,2006,29(4):392-395.Wang Jun,Wang Lanmin,Li Lan.Earthquake Liquefaction of Loess Site[J].Journal of seismological research,2006,29(4):392-395.
[3]GB50021-2001岩土工程勘察规范[S].北京:中国建筑工业出版社,2009.GB50021-2001 Code for investigation of geotechnical engineering[S].Beijing:China Architecture and Building Press,2010.
[4]汪闻韶.土工地震减灾工程中的一个重要参量——剪切波速[J].水利学报,1994年03期:80-84.Wang Wenshao.An Important Parameter in Geotechnical Engineering for Earthquake disaster Mitigation-Shear Wave Velocity[J].Journal of Hy-draulic Engineering,1994(3):80-84.
[5]石兆吉,郁寿松,丰万玲.土壤液化式的剪切波速判别方法[J].岩土工程学报,1993,15(1):74-80.Shi Zhaoji,Yu Shousong,Feng Wan-ling.shear Wave velocity based Soil liquefaction Evaluation[J].Chinese Journal of Geotechnical Engineer-ing,1993,15(1):74-80.
[6]曹振中.基于可靠性理论的砂土液化判别方法研究[D].哈尔滨:中国地震局工程力学研究所,2006.Cao Zhenzhong.Study on Reliability-Based Procedure for Evaluating Liquefaction Potential[D].Harbin:Institute of Engineering Mechanics ChinaEarthquake Administation,2006.
[7]周燕国,陈云敏,柯瀚.砂土液化势剪切波速简化判别法的改进[J].岩石力学与工程学报,2005,24(13):2369-2375.Zhou Yan-guo,Chen Yun-Min,Ke Han.Improvement of Simplified Procedure for Liquefaction Potential Evaluation of Sands by Shear Wave Ve-locity[J].Chinese Journal of Rock Mechanics and Engineering,2005,24(13),2369-2375.
[8]Andrus R.D.and Stokoe K.H.II.Liquefaction resistance of soils from shear-wave velocity[J].Journal of Geotechnical and GeoenviromentalEngineering,ASCE,2000,126(11):1015-1025.
[9]Youd T L,Idriss I M.Liquefaction Resistance of Soils:Summary Report from the 1996 NCEER and 1998 NCEER/NSF Workshops on Evaluation ofLiquefaction Resistance of Soils[J].Journal of Geotechnical and Geoenvironment Engineering,2001,127(4):297-313.
[2]王峻,王兰民,李兰.黄土场地地震液化研究[J].地震研究,2006,29(4):392-395.Wang Jun,Wang Lanmin,Li Lan.Earthquake Liquefaction of Loess Site[J].Journal of seismological research,2006,29(4):392-395.
[3]GB50021-2001岩土工程勘察规范[S].北京:中国建筑工业出版社,2009.GB50021-2001 Code for investigation of geotechnical engineering[S].Beijing:China Architecture and Building Press,2010.
[4]汪闻韶.土工地震减灾工程中的一个重要参量——剪切波速[J].水利学报,1994年03期:80-84.Wang Wenshao.An Important Parameter in Geotechnical Engineering for Earthquake disaster Mitigation-Shear Wave Velocity[J].Journal of Hy-draulic Engineering,1994(3):80-84.
[5]石兆吉,郁寿松,丰万玲.土壤液化式的剪切波速判别方法[J].岩土工程学报,1993,15(1):74-80.Shi Zhaoji,Yu Shousong,Feng Wan-ling.shear Wave velocity based Soil liquefaction Evaluation[J].Chinese Journal of Geotechnical Engineer-ing,1993,15(1):74-80.
[6]曹振中.基于可靠性理论的砂土液化判别方法研究[D].哈尔滨:中国地震局工程力学研究所,2006.Cao Zhenzhong.Study on Reliability-Based Procedure for Evaluating Liquefaction Potential[D].Harbin:Institute of Engineering Mechanics ChinaEarthquake Administation,2006.
[7]周燕国,陈云敏,柯瀚.砂土液化势剪切波速简化判别法的改进[J].岩石力学与工程学报,2005,24(13):2369-2375.Zhou Yan-guo,Chen Yun-Min,Ke Han.Improvement of Simplified Procedure for Liquefaction Potential Evaluation of Sands by Shear Wave Ve-locity[J].Chinese Journal of Rock Mechanics and Engineering,2005,24(13),2369-2375.
[8]Andrus R.D.and Stokoe K.H.II.Liquefaction resistance of soils from shear-wave velocity[J].Journal of Geotechnical and GeoenviromentalEngineering,ASCE,2000,126(11):1015-1025.
[9]Youd T L,Idriss I M.Liquefaction Resistance of Soils:Summary Report from the 1996 NCEER and 1998 NCEER/NSF Workshops on Evaluation ofLiquefaction Resistance of Soils[J].Journal of Geotechnical and Geoenvironment Engineering,2001,127(4):297-313.
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