论文部分内容阅读
松散的饱和砂土在液化之前可作为固体看待,但当过量的孔隙水压达到初始侧应力时它成为液体,之后又恢复其强度。这个过程不能各自单独处理,而应视为一个从固态到液态,或从液态到固态的连续变化过程。因此,整个伴随着地基液化———土体流动现象全过程应作为一个在固态和液态之间相变的系列过程。本文导出了一个简单的基本方程式,可以表达松散饱和砂土在液化和地基侧向滑移现象期间的固-液相转换。该基本方程式可用作桩基系统的动力分析,其适用性通过与弹塑性基本方程的比较得到验证。
Loose saturated sand can be regarded as a solid before it liquefies, but becomes liquid when excess pore water pressure reaches initial lateral stress and then resumes its strength. This process can not be handled individually but rather as a continuous process from solid to liquid or from liquid to solid. Therefore, the entire process of soil liquefaction accompanied with the phenomenon of soil flow should take the whole process of phase transition between solid and liquid. This paper derives a simple basic equation that expresses the solid-liquid phase transition of loose saturated sand during liquefaction and lateral slip of the foundation. The basic equation can be used as a dynamic analysis of pile foundation system, and its applicability is verified by comparison with the basic equations of elasticity and plasticity.