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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。
On February 24, 2003, the 6.8 magnitude earthquake that occurred in the Bachu-Jiashi area of Xinjiang Province has seen the most serious sand liquefaction in mainland China since the 1996 Tangshan earthquake. Based on the seismic liquefaction survey, the applicability of the liquefaction discrimination method, including the standard liquefaction discrimination method, the Robertson method and the Olsen method, both at home and abroad, as an indicator, is tested. The results show that, in our country’s criterion, Robertson method and Olsen method, the success rate of distinguishing liquefaction sites in the non-liquefied sites is higher than that of liquefaction sites in general. The successful rates of non-liquefaction sites are 88%, 71% % And 88%, respectively. However, the successful rates of liquefaction sites are 55%, 73% and 45%, respectively, which are obviously dangerous. The reason needs to be further clarified. Establishing liquefaction judging method suitable for some areas should be the work that must be carried out in the future.