林本海          （广东省建筑设计研究院 广州 510010）

     谢定义          （西安理工大学 710048）

 

[提要]  通过对室内动三轴试祥和水平场地内土单元体在动荷作用下的液化过程和相应应力变化特性的深入分析，建立了适用于三维条件下可液化地基液化判定的新标准，不仅对液化机理的认识更深入了一步，而且为土体动力反应分析时的准确评判打下了基础。
[关键词]  可液化地基  瞬态极限平衡 侧向约束 液化判定标准

At first, it is deeply analysed that liquefaction process and its stress-strain characteritics of dynamic triaxialosample and of soil element in horizontal field when dynamic load affect. The secend, a kind of 3 -D liquefaction determination criterion is established based on the principles of limited equilibrium theory and the characteristics of pore water pressure developed in soil mass. Not only these results could help us understand deeply the liquefaction mechanism, but also the criterion could determinate correctly the lique-faction period when analysising dynamic reflecting of soil mass.
Keywords: liquefaction poteritial  foundation; instantaneous equilibrium; lateral  restraint; liquefaction determination criterion