摘要
本文对辽西地区风积砂土地震液化特性进行了实验研究,对围压、固结比、密度和细粒含量进行了分析,得出了它们对抗液化强度的影响规律,同时分析了不同细粒含量和干密度对砂土振动孔压发展模式的影响规律。在偏压固结情况下,振动孔压的发展趋势可以用双曲线对其进行模拟;在均压固结条件下,振动孔压的发展趋势和H.B.Seed、张建民等人研究的振动孔压发展趋势的曲线形态相一致。通过实验分析表明细粒含量、密度等都会对孔压的增长规律有一定影响。
For the purpose of examining the characteristics of the aeolian sand in western Liaoning,this paper takes the aeolian sand as an experimental object to test the earthquake liquefaction properties.Based on the experiment data,the consolidation ratio,confining pressure,density and fine-grained content are analyzed to examine the influence rules of such factors to the anti-liquefaction strength and the different content on dry density and the fine-grained to the sand dynamic pore pressure development model is established.The pore pressure has two distinct trends.Under the condition of pressure bias and consolidation,it can be simulated by the hyperbolic model,but while the pressure is equalizing and consolidation,it is in agreement with the curve shape suggested by Seed and Zhang.Finally,we conclude that the factors such as density,fine-grained content and so on will have certain impact on the law of pore pressure increase.
出处
《水文地质工程地质》
CAS
CSCD
北大核心
2012年第3期65-69,共5页
Hydrogeology & Engineering Geology
基金
国家自然科学基金(50978131)
关键词
风积砂土
砂土液化
动三轴仪
抗液化强度
振动孔压
aeolian sand
soil liquefaction
dynamic triaxial apparatus
anti-liquefaction strength
dynamic pore water pressure
