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含细粒砂性土标贯液化判别方法改进研究

董林, 王兰民, 夏坤, 袁晓铭

董林, 王兰民, 夏坤, 袁晓铭. 含细粒砂性土标贯液化判别方法改进研究[J]. 岩土工程学报, 2015, 37(12): 2320-2325. DOI: 10.11779/CJGE201512024
引用本文: 董林, 王兰民, 夏坤, 袁晓铭. 含细粒砂性土标贯液化判别方法改进研究[J]. 岩土工程学报, 2015, 37(12): 2320-2325. DOI: 10.11779/CJGE201512024
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DONG Lin, WANG Lan-min, XIA Kun, YUAN Xiao-ming. Improvement of SPT-based liquefaction discrimination methods for fines-containing sandy soils[J]. Chinese Journal of Geotechnical Engineering, 2015, 37(12): 2320-2325. DOI: 10.11779/CJGE201512024
Citation: DONG Lin, WANG Lan-min, XIA Kun, YUAN Xiao-ming. Improvement of SPT-based liquefaction discrimination methods for fines-containing sandy soils[J]. Chinese Journal of Geotechnical Engineering, 2015, 37(12): 2320-2325. DOI: 10.11779/CJGE201512024
shu

含细粒砂性土标贯液化判别方法改进研究  English Version

  • 1. 中国地震局兰州地震研究所,甘肃 兰州 730000;
    2. 中国地震局工程力学研究所,黑龙江 哈尔滨 150080

基金项目: 中国地震局地震预测研究所基本科研业务专项项目
详细信息
    作者简介:

    董 林(1985- ),男,博士研究生,助理研究员,主要从事岩土地震工程研究。E-mail: donglin408@163.com。

Improvement of SPT-based liquefaction discrimination methods for fines-containing sandy soils

  • 1. Lanzhou Institute of Seismology, CEA, Lanzhou 730000, China;
    2. Institute of Engineering Mechanics, CEA, Harbin 150080, China

摘要

    摘要
  • 摘要: 含细粒砂性土相对于纯净砂在自然界中分布更为广泛,但是对于其液化判别,一直都是作为纯净砂液化判别的附属成果,没有得到足够的重视。回顾了中国规范方法与NCEER推荐方法,结合1999年台湾集集地震液化土与非液化土数据,发现两个方法定义纯净砂的矛盾,通过进一步对比判别结果,建议对两个方法做如下改进：①对中国规范方法,首先取消粉砂黏粒含量取3%的规定,并且对黏粒含量不大于3%且细粒含量大于15%的粉砂及粉土,取ρc=Fc/4,否则取3%;②对NCEER方法,当黏粒含量不大于3%时,只针对细粒含量大于20%的土,才考虑调整(N1)60。改进之后,中国规范方法过于保守的问题得到解决,NCEER方法对于黏粒含量不大于3%且细粒含量大于5%的土判别结果也不再偏于危险。
    Abstract: Most of natural sands contain significant amounts of fines. However, the liquefaction discrimination methods for fines-containing sandy soils are always as a subsidiary to those for clean sands, and enough attention hasn't been paid to. The Chinese method and NCEER method are reviewed, and the discrepancy that two methods define clean sand for Chi-Chi earthquake data is found. By comparing the identification results of soils in Chi-Chi earthquake, the following improvements are suggested for the two methods: (1) for the Chinese method, firstly we should abandon the view that the clay content for silty sands is always 3%. Secondly, for the silty sands and silts with clay content not greater than 3% and fine content more than 15%, take ρc=Fc/4, if not, take 3%; (2) for the NCEER method, if the clay content is not greater than 3%, we should adjust (N1)60 to (N1)60cs only for the soils with fine content more than 20%. In doing so, the Chinese method is not any more too conservative, and the NCEER method are no longer tending to be dangerous for the soils with clay content not greater than 3% and fine content more than 5%.
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    • 参考文献(9)
  • [1] SEED R B, CETIN K O, MOSS R E S, et al. Recent advances in soil liquefaction engineering, a unified and consistent framework[R]. California: Earthquake Engineering Research Center, 2003.
    [2] SEED H B, IDRISS I M, ARANGO I. Evaluation of liquefaction potential using field performance data[J]. Journal of Geotechnical Engineering, 1983, 109(3): 458-482.
    [3] SEED H B, TOKIMATSU K, HARDER L F, et al. The influence of SPT procedures in soil liquefaction resistance evaluations[J]. Journal of Geotechnical Engineering, 1985, 111(12): 1425-1445.
    [4] 谢君斐. 关于修改抗震规范砂上液化判别式的几点意见[J]. 地震工程与工程振动, 1984, 4(2): 95-126. (XIE Jun-fei. Some comments on the formular estimating the liquefaction of sand in revised aseismic design code[J]. Journal of Earthquake Engineering and Engineering Vibration, 1984, 4(2): 95-126. (in Chinese))
    [5] HWANG J H, YANG C W. Verification of critical cyclic strength curve by Taiwan Chi-Chi earthquake data[J]. Soil Dynamics and Earthquake Engineering, 2001, 21: 237-257.
    [6] GB50011—2010建筑抗震设计规范[S]. 2010. (GB0011—2010 Code for seismic design of buildings[S]. 2010. (in Chinese))
    [7] YOUD T L, IDRISS I M. Liquefaction resistance of soils: summary report from the 1996 NCEER and 1998 NCEER/NSF workshops on evaluation of liquefaction resistance of soils[J]. Journal of Geotechnical and Geoenvironment Engineering, 2001, 127(4): 297-313.
    [8] GB 50021—2001 岩土工程勘察规范[S]. 2001. (GB 50021—2001 Code for investigation of geotechnical engineering[S]. 2001. (in Chinese))
    [9] 喻 萍, 袁苏跃, 王海莹. 昆明地区粉、砂土液化判别存在问题的讨论[J]. 昆明理工大学学报（理工版）, 2004, 29(2): 99-102. (YU Ping, YUAN Su-yue, WANG Hai-ying. Discussion about the questions of the differentiation method for liquefaction of sandy and silty soil in kunming area[J]. Journal of Kunming University of Science and Technology (Science and Technology), 2004, 29(2): 99-102. (in Chinese))
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出版历程
  • 收稿日期:  2014-09-05
  • 发布日期:  2015-12-19

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