一、前言饱和粘土的地基、边坡及土工建筑物在地震作用下的稳定问题,是工程中十分关切的问题之一。地震时处在饱和粘土的厂房、桥梁、道路、土坝以及码头岸坡的震害实例不胜枚举。如1976年唐山丰南地震时,天津塘沽新港的高桩码头岸坡都受到不同程度的影响。地震期间,几处发现有滑坡现象;而大 I. INTRODUCTION The stability of saturated clay foundations, slopes and geotechnical structures under earthquakes is one of the issues of great concern in the project. There are numerous examples of earthquake damage in factories, bridges, roads, earth dams and quayside slopes in saturated clay during the earthquake. For example, when the Tangshan Fengnan earthquake occurred in 1976, the bank slope of the high-piled wharf in Tianjin Tanggu New Port was affected to varying degrees. During the earthquake, landslides were found in several places;