砂土的地震液化分析与防护

运用理论分析和实践对比的方法,系统研究了砂土地震液化的危害、产生的机理、形成条件以及判别标准。研究认为砂土液化与砂土的相对密度、粒径大小、成分、级配组成、密度、饱水砂层的成因、时代、埋藏条件以及地震等因素有关,并且需满足一定的条件才能产生砂土液化现象。同时给出了剪应力法、标贯试验法、静力触探法等常见的液化判别方法。最后从建筑场地的选择、地基的改良、基础形式的选择及砌置深度等方面提出了具体的砂土液化防治措施与方法。

Analyzing and preventing seismic liquefaction of sands

The paper systematically analyzes sands seismic liquefaction hazard,mechanism, conditions of forming and distinguishable criterion through theoretical analysis and practical contrast. It concludes that seismic lique- faction relates to relative density,size of particle,component,grade of particle,density,cause of full water sands formation,age, embedding condition and earthquake. It will happen under certain conditions. It gives distin- guishable methods, such as shearing strength method, standard penetration test method, cone penetration test method. Finally the paper puts forwards material preventing seismic liquefaction methods, such as building site selection,ground reinforce,shape selection and embedding depth of foundation.