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Study on Characteristics of Pore Pressure of Soft Clay during Unloading Based on Lab Tests
Author(s): 
Pages: 17-21
Year: Issue:  10
Journal: Geotechnical Investigation & Surveying

Keyword:  软粘土 卸荷剪切 孔隙水压力;
Abstract: 本文在试验的基础上,对饱和软粘土的卸荷孔压特性进行了研究。试验表明:在卸荷应力路径下,孔压表现出先增加后降低的特性,而且随着固结压力的增大,这种特性表现的更突出。如果忽略初期的孔压增加,归一化的孔压与主应变表现了较好的直线关系。通过普通三轴试验和真三轴试验的对比分析可以发现:对于相同的应力路径,平面应变情况下主应变随孔压变化的速度远小于轴对称试验的变化速度。
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