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原文提出了一个确定往返荷载下饱和砂土有效应力强度指标的方法,现提出几点意见与作者进行讨论。 (一)原文结论之一指出,以开始剪胀作为达到极限平衡状态的标志,但原文并没有找出往返荷载下饱和砂土实际出现剪胀现象的时刻,而是人为规定以出现所谓“反转”现象时,压半周动应力达到峰值时刻作为土体开始进入极限平衡状态的标志(后称“标志”),并认为在产生“反转”现象之前,饱和砂样一直属于压密。大量饱和砂土振动三轴试验表明:饱和砂土在往返荷载下,一般要经历由动荷作用的拉、压两个半周中的某一半周首先开始达到极限平衡状态而发展到另一个半周也达到极限平衡状态。但究竟拉、压两半周中那一个半周的那一时刻先达到极限平衡,则完全取决于固结应力
The original proposes a method for determining the effective stress intensity index of saturated sand under cyclic loading. Several opinions are now discussed with the author. (a) One of the original conclusions pointed out that the beginning of dilatancy was used as a sign to reach the state of limit equilibrium, but the source did not find out the moment when the dilatancy phenomenon actually occurs in the saturated sand under the reciprocal load, but it was artificially stipulated that the so-called “anti- When the phenomenon of “turning” occurs, the moment when the semi-periodic stress reaches the peak is used as a sign that the soil starts to enter the limit equilibrium state (hereinafter referred to as “mark”), and it is considered that the saturated sand sample is always compacted before the “reversal” phenomenon occurs. A large number of triaxial tests of saturated sandy soil vibration show that saturated sand generally undergoes a dynamic load and it is subjected to a load and a load. Generally, one half cycle of the two half weeks of pulling and pressing begins to reach the limit equilibrium state and develop to the other half cycle. Reached the limit equilibrium. However, it is entirely dependent on the consolidation stress that the limit equilibrium is reached at the moment in the half-week period of pulling and pressing.