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Creep effects on G_(max) of clayey soils in 1-D consolidation tests

机译：一维固结试验中蠕变对黏性土壤G_（max）的影响

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Creep effects, together with the effects of initial water content at deposition, on the quasielastic shear modulus, G_(max), of clayey soil is studied in the consolidometer equipped with bender elements. The reconstituted clay samples from Minato-Mirai (MM) site in Yokohama were prepared by means of two different methods. One refers to the conventioanl method (i.e., type-A) in which the samples were cut out of preconsolidated block samples prepared with the initial water content twice the liquid limit. The other group of samples (type-B) was directly consolidated in the consolidometer with initial water content ranging from 1.5 to 5.0 times the liquid limit. The samples with higher initial void ratio showed little higher degree of ondepositional sturcturation. The increase in G_(max) with time, represented by a factor N_G, showed similar variations in both types of smaples and its absolute value flucturated around 0.20. It is also manifested that the aspect of structuration and destructuration may be successfully expressed by Metastability Index MI_((Gmax)), which reaches to a maximum at the end of sustained loading and vanishes slowly with increase in stress level. For the present test conditions and duration, subsequent stress of 1.5-2.0 times the creep stress brought about the complete destructuration of the creep-added soil-structure formed in the previous creep step.
机译：在配备弯管机的固结仪中研究了蠕变效应以及沉积时初始含水量对黏土的准弹性剪切模量G_（max）的影响。通过两种不同的方法，从横滨的Minato-Mirai（MM）站点重建了粘土样品。一种是指常规方法（即A型），其中将样品从初始固含量为液体限量两倍的预固结块状样品中切出。将另一组样品（B型）直接在固结仪中固结，初始含水量为液位的1.5到5.0倍。具有较高初始空隙率的样品几乎没有较高的沉积沉积度。由因子N_G表示的G_（max）随时间的增加在两种类型的方括号中都显示出相似的变化，并且其绝对值在0.20左右波动。还表明，结构和破坏方面可以通过亚稳性指数MI _（（Gmax））成功表示，该指数在持续荷载的末端达到最大值，并随着应力水平的增加而逐渐消失。对于当前的测试条件和持续时间，随后的1.5-2.0倍蠕变应力的应力导致了在先前的蠕变步骤中形成的蠕变添加的土壤结构的完全破坏。

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