砂土振动液化是岩土工程中的一个特殊而重要的问题。从工程的观点，有两方面的问题是最基本的：①砂土振动液化触发或产生的条件；②初始液化后的结果。砂土初始液化后的结果通常有两种：①无失稳时将产生很大的沉降或侧向位移；②液化失稳时将丧失承载力或产生侧向流动。我国? Sand liquefaction is a special and important issue in geotechnical engineering. From the engineering point of view, there are two aspects of the problem are the most basic: 1 the conditions of the sand liquefaction triggered or generated; 2 the results of the initial liquefaction. The initial liquefaction of sand usually results in two types: (1) When there is no instability, there will be large settlement or lateral displacement; (2) When the liquefaction fails, the bearing capacity will be lost or lateral flow will occur. China?