黏土动剪切模量的时间效应

W. F. Marcuson, H. Wahls
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引用次数: 75

摘要

采用哈丁振荡器对高岭石和钙基膨润土重塑试样在三轴室内各向同性固结压力下施加稳态扭转振动载荷。采用共振柱试验的原理确定动剪切模量。初次固结完成后,研究了排水和不排水条件下的响应随时间的变化。对这些数据进行了回归分析,得到了孔隙比、有效应力和时间对两种黏土动力响应的影响关系。两种材料的剪切模量均随压力的增大、空隙比的减小和时间的延长而增大。在恒定有效应力下,初次固结完成后,每对数周期的高岭土和膨润土的增幅分别约为10%和40%。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Time Effects on Dynamic Shear Modulus of Clays
A Hardin oscillator was used to apply a steady-state, torsional vibratory load to remolded specimens of kaolinite and calcium bentonite inside a triaxial chamber and under an isotropic consolidation pressure. The principles of the resonant column test were used to determine the dynamic shear modulus. After completion of primary consolidation, the response was studied as a function of time for both drained and undrained conditions. Regression analyses were performed on these data and relationships are presented which show the effects that void ratio, effective stress, and time have on the dynamic response of these two clays. The shear modulus was shown to increase with increasing pressure, decreasing void ratio and time for both materials. This increase was approximately 10% of kaolinite and 40% for bentonite per logarithmic cycle of time after completion of primary consolidation for constant effective stress.
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