静力触探法对巴楚地震液化判别的适用性
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摘要
2003年2月24日新疆巴楚-伽师地区发生的6.8级地震中出现了自1996年唐山大地震以来我国大陆境内最为严重的砂土液化现象。以此地震液化调查为基础,检验包括我国规范液化判别方法、Robertson方法和Olsen方法的国内外现有静力触探试验为指标的液化判别方法的适用性。结果表明,我国规范、Robertson方法、Olsen方法在对巴楚地震液化场地判别中,总体上非液化场地判别成功率高于液化场地判别成功率,非液化场地的判别成功率分别为88%、71%和88%,但对液化场地判别成功率分别为55%、73%和45%,明显偏于危险,原因需要进一步查明,建立适合局部地区的液化判别方法应是未来必须进行的工作。
The large scale of soil liquefaction in Bachu-Jiashi earthquake in Xinjiang Autonomous Region on 24 February,2003 is the most notable phenomena of sand liquefaction in China mainland since the Tangshan Great Earthquake in 1976. In terms of the investigation in Bachu-Jiashi area,the feasibility of conventional cone penetration test (CPT) to evaluating liquefaction,including Chinese code method,the Robertson method and the Olsen method,is inspected. The results show that the prediction success ratios of Chinese code,the Robertson and the Olsen methods used for the Bachu earthquake liquefaction prediction overall higher in non-liquefied sites than those in liquefied sites. The prediction success ratios are 88%,71% and 88% for the non-liquefied sites; but 55%,73% and 45% for the liquefied sites respectively,which are dangerous and reason should be identifed in the future. Also,an appropriate local liquefaction prediction method in Xinjiang region has to be established.
The large scale of soil liquefaction in Bachu-Jiashi earthquake in Xinjiang Autonomous Region on 24 February,2003 is the most notable phenomena of sand liquefaction in China mainland since the Tangshan Great Earthquake in 1976. In terms of the investigation in Bachu-Jiashi area,the feasibility of conventional cone penetration test (CPT) to evaluating liquefaction,including Chinese code method,the Robertson method and the Olsen method,is inspected. The results show that the prediction success ratios of Chinese code,the Robertson and the Olsen methods used for the Bachu earthquake liquefaction prediction overall higher in non-liquefied sites than those in liquefied sites. The prediction success ratios are 88%,71% and 88% for the non-liquefied sites; but 55%,73% and 45% for the liquefied sites respectively,which are dangerous and reason should be identifed in the future. Also,an appropriate local liquefaction prediction method in Xinjiang region has to be established.
引文
[1]蔡国军,刘松玉,童立元,等.基于静力触探测试的国内外砂土液化判别方法[J].岩石力学与工程学报,2008,27(5):1019-1027.CAI Guo-jun,LIU Song-yu,TONG Li-yuan,et al.Evaluation of liquefaction of sandy soils based on cone penetration test[J].Chinese Journal of Rock Mechanics and Engineering,2008,27(5):1019-1027.
[2]中华人民共和国国家标准编写组.GB50021-2001岩土工程勘察规范[S].北京:中国建筑工业出版社,2001.
[3]中华人民共和国国家标准编写组.GB50021-2001岩土工程勘察规范[S].北京:中国建筑工业出版社,2001.
[4]SEED H B,IDRISS I M.Simplified procedure for evaluating soil liquefaction potential[J].Journal of the Soil Mechanics and Foundations Division,ASCE,1971,97(9):1249-l273.
[5]ROBERTSON P K,WRIDE C E.Evaluating cyclic liquefaction potential using cone penetration test[J].Canadian Geotechnical Journal,1998,35(3):442-459.
[6]OLSEN R S.Normalization and prediction of geotechnical properties using the cone penetration test[R].Vicksburg:MI U.S.Army Corps of Engineers,1994.
[7]张超,杨春河.尾矿坝液化判别简化方法研究[J].岩土工程学报,2006,25(增2):3730-3736.ZHANG Chao,YANG Chun-he.Study on a simplified procedure for evaluating liquefaction potential of tailings dam[J].Chinese Journal of Rock Mechanics and Engineering,2006,25(Supp.2):3730-3736.
[8]OLSEN R S.Cyclic liquefaction based on the cone penetration test[R].New York:State University of New York at Buffalo,1997:225-276.
[2]中华人民共和国国家标准编写组.GB50021-2001岩土工程勘察规范[S].北京:中国建筑工业出版社,2001.
[3]中华人民共和国国家标准编写组.GB50021-2001岩土工程勘察规范[S].北京:中国建筑工业出版社,2001.
[4]SEED H B,IDRISS I M.Simplified procedure for evaluating soil liquefaction potential[J].Journal of the Soil Mechanics and Foundations Division,ASCE,1971,97(9):1249-l273.
[5]ROBERTSON P K,WRIDE C E.Evaluating cyclic liquefaction potential using cone penetration test[J].Canadian Geotechnical Journal,1998,35(3):442-459.
[6]OLSEN R S.Normalization and prediction of geotechnical properties using the cone penetration test[R].Vicksburg:MI U.S.Army Corps of Engineers,1994.
[7]张超,杨春河.尾矿坝液化判别简化方法研究[J].岩土工程学报,2006,25(增2):3730-3736.ZHANG Chao,YANG Chun-he.Study on a simplified procedure for evaluating liquefaction potential of tailings dam[J].Chinese Journal of Rock Mechanics and Engineering,2006,25(Supp.2):3730-3736.
[8]OLSEN R S.Cyclic liquefaction based on the cone penetration test[R].New York:State University of New York at Buffalo,1997:225-276.
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