饱和土液化判别公式的讨论
首发时间:2011-11-21
摘要:对2010版和2001版建筑抗震设计规范中饱和土液化判别公式进行了分析和讨论。指出了液化初判公式中几个尚未考虑到的问题;重点讨论了两本规范在液化判别公式形式、判别深度以及参数取值等方面的不同点,两本规范判别结果的差值可达-2~5个锤击数,特别是对于地震设计第三组,两本规范所得判别结果相差较大,新规范相对偏于安全;当判别深度为5~15m时,新规范所得液化指数的判别结果相对较大。
关键词: 地下工程 饱和土 液化 判别公式 液化指数 设计规范
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Discussion on Liquefaction Formula of Saturated Soil
Abstract:Discuss and analysis on the liquefaction formulas of saturated soil in the code for seismic design of buildings between version 2010 and version 2001. In preliminary distinguishing formula, several problems haven't taken into account in the code. Focus on the differences depending on the form of formulas, the depth of penetration and the values of parameters in the two codes, the differentials of hammering numbers can reach -2~5, especially, for the design of the third group of earthquakes, the results are very different, the new code is more safety than the old code. For the formula of liquefaction index, if the range of thicknesses is 5~15m, the result of new code is larger than the old code.
Keywords: underground engineering saturated soil liquefaction distinguish formula liquefaction index design code
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