【摘要】 首先对20世纪90年代以前有关饱和砂土液化的研究工作进行了简要回顾,然后重点对近期液化的离心机实验研究、液化引起的地面大位移及对结构物的破坏等进行了综述。同时也对液化的判别方法、粉砂液化、静态液化等进行了评述.认为今后的研究重点是液化引起的地面大位移及对结构物的破坏等,其中涉及到结构与土的耦合问题、流变体(液化区域内的砂土)和固体(未液化区域的砂土)耦合及演变的问题,需要多学科(岩土力学、数值分析、流体力学、结构力学等)的研究人员共同研究.其中,液化前后的土体本构关系是需要研究的核心内容。今后需利用离心机实验、现场原位实验开展工作,并进行相关实验技术研究工作。更多还原

【Abstract】 This paper reviews the advances of liquefaction researches on saturated soils since the 1990’s, especially, the centrifuge experiments and the liquefaction-induced displacement. At the same time, the criterion of liquefaction, the effect of fine sands on the liquefaction , the static liquefaction are discussed. It is shown that the important problems include the liquefaction-induced large displacements and its damage to the structures. The coupling and evolution of the interaction between the sands and the structures, and the coupling of fluid(the liquefied area) and solids(the area having not liquefied) are the key problems. These problems concern multi-knowledge (includes soil mechanics, numerical simulation, fluid mechanics and structure mechanics) .The constitutive relation before and after liquefaction is the key to study the liquefaction-induced large displacement. The centrifuge experiments and the in-situ experiments such as CPT are important tools in the study of liquefaction. The technology related with these two experiments should be studied.更多还原