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《地下空间与工程学报》 2005-03
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Research of Intact Loess through Continuous Loading k_0 Consolidation Tests

QI Ming-shan1 , FENG Cui-xia2 , XIE Yong-li , LIU Bao-jian3(1.Department of Geotechnical Engineering, Tongji University, Shanghai 200092;2.Shanghai Shenyuan Geotechnical Engineering Company Limited, Shanghai 200011;3.College of Highway, Chang'an University, Xi'an 710064)  
A series of k_0 consolidation tests under constant rate of loading were carried out on the loess (Q_3), which comes from Longxi area in Gansu province. Based on the analysis of the experimental data, the deforming process of the intact loess is divided into three stages because of its special structure. In the first stage, its original structure is intact on the whole. In the second one, its original structure is destroyed. In the third one, its new structure is formed. The deformation produced in the first stage is minute and can be ignored. In the following stages, the relationship between axial strain and the logarithm of the axial stress is approximately linear, which can be used to calculate the deformation in the process of continuous loading. When stress is unchanged, the relationship between axial strain and time is almost hyperbolic, which can be used to calculate the deformation in the process of the stabilization of loading.
【CateGory Index】: TU444
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