【摘要】 饱和砂土的强度、液化和破坏问题是水工建筑物地基和土石坝抗震安全中考虑的重要问题。本文建议以极限平衡作为饱和砂土在往返荷载下开始破坏的准则,并且提出了相应的试验和分析方法。阐明了液化与开始破坏的区别。提供了两种估计饱和砂土在往返荷载下孔隙水压力变化的途径,其中之一考虑了它们的扩散和消散作用。更多还原

【Abstract】 The problem of strength, liquefaction and failure of saturated sands has always been greatly concerned in dealing with the safety of foundations of hydraulic structures and earth or earth-rock dams against earthquake action. The theory of limit equilibrium is adopted as a criterion in evaluation of the incipient failure state of saturated sands under cyclic loading, and the corresponding laboratory tests and analytical methods are suggested. The difference between liquefaction and incipient failure is clarified. Two types of approach are proposed for evaluation of pore water pressure changes induced by cyclic loading, in one of which their dispersion and dissipation behaviour is taken into account.更多还原