摘要
砂土液化判别是场地岩土地震稳定性评价的重要组成部分。国内通常采用规范推荐的基于标准贯入试验的砂土液化判别方法;而欧美、非洲及东南亚大多采用Seed简化法。在对我国《建筑抗震设计规范》(GB 50011—2010)中砂土液化判别方法与国外修正的Seed简化法的原理、方法及参数进行分析的基础上,将这2种方法进行比较,进而讨论了2种方法判别结果的差异。对比分析发现:相对于规范法,Seed简化法对于表层地基土偏于安全;但对深层地基土判别,规范法更为保守。
Evaluating liquefaction of sandy soils is an important part of the site geotechnical seismic stability evaluation. In china, the method for evaluating the potential of soil liquefaction is recommended by ＂Code for seismic design of buildings （GB 50011 --2010）＂,which is based on standard penetration test （SPT）.While in Europe, africa and Southeast Asia, Seed＇s simplified method is mostly used in project. Base on the analysis in the principles, methods and parameters,the two methods was compared,and the differences of results of evaluation was analyzed. It is shown that the result made by seed＇s simple method is safer than the result made by method of Chinese code in surface foundation; but it＇s contrary in deep foundation.
出处
《工程建设与设计》
2015年第5期53-56,共4页
Construction & Design for Engineering
关键词
砂土液化
标准贯入试验
Seed简化法
周期应力比
周期阻力比
liquefaction of sandy soil
standard penetration test （SPT）
seed＇s simply method
cyclic stress ratio（CSR）
cyclic resistance ratio（CRR）
