一、前言地震砂土液化研究在我国已进行多年,在液化机理、液化可能性判别和预测危害性等方面也已取得一些成就。但是,这些研充基本停留在纯经验或半经验半理论的基础上,例如,判别现场液化的主要依据是喷砂冒水等宏观现象,现有的液化判别式多半是依据这些宏观现象和某些指标建立的。少数依据室内试验结果的液化判别法,虽然可以计算出土层中地震孔隙水压力的发展和消散过程,但人们对这种孔隙水压力的真正变化却知道的极少,因此,国内外学者自七十年代末开始致力于 I. Preface The seismic sand liquefaction research has been carried out for many years in our country and some achievements have also been made in the areas of liquefaction mechanism, liquefaction possibility discrimination and prediction of harmfulness. However, these researches basically remain on the basis of pure experience or semi-empirical semi-theory. For example, the main basis for judging on-site liquefaction is macroscopic phenomena such as sandblasting and so on. Most existing liquefaction discriminants are based on these macroscopic phenomena and some Some indicators of the establishment. Although a small number of liquefaction determination methods based on indoor test results can calculate the development and dissipation process of the pore water pressure in the soil layer, little is known about the true change of pore water pressure. Therefore, scholars from home and abroad The end of the decade began to work