国内外砂土液化判别方法的比较  

Comparison of Discrimination Methods for Sand Liquefaction Used at Home and Abroad

作　　者：唐世栋[1] 罗立疆[1] 林华国[1] 

机构地区：[1]同济大学地下建筑与工程系,上海200092

出　　处：《工程勘察》2007年第4期4-6,42,共4页Geotechnical Investigation & Surveying

摘　　要：国内外判别砂土液化的方法是不同的。在对国标《建筑抗震设计规范》中砂土液化判别方法与国外修正的Seed判别法的原理、方法、参数进行分析的基础上,用数值拟合法将Seed公式作了简化,使其可与前者进行比较,进而讨论了不同影响因素下两种方法的差异。可以看出:土体埋深、地下水位埋深以及地震烈度对两种方法中的锤击数临界值都有不同影响。由于这些差异的存在,用不同方法判别砂土液化可能性时会得出不同的、甚至是相反的结果。用工程实例进行了对比验算。The discrimination methods for sand liquefaction used at home and abroad are different. Based on the analysis of the principle, formulas and parameters in the Code for Seismic Design of Buildings （GB50011-2001 ） and in the Seed＇s method, the latter method is simplified by the numerical fitting. Then the comparison between them can be made. After discussing the difference between the two methods under the influence of different factors, it can be found that there are different influences on the critical counts in the two methods owing to the depth, the groundwater table and the seismic intensity. The discrimination results from different methods may be different, even be opposite. The contrast and checking computations are made by using project examples.

关 键 词：液化判别 建筑规范法 Seed判别法 锤击数临界值 数值拟合法 

分 类 号：TU413[建筑科学—岩土工程]