Abstract:
The increasing creep time is assumed to be another kind of load, for the loess is of creep characteristics, that is, the increasing creep time
t may induce the void ratio to decrease when the load
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is constant. Aiming at exploring the dependency of
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t loading sequence for the loess deformation, four loading paths are tested. The results indicate that the dependency of
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t loading sequence for the loess deformation is obvious. All samples arrive at the same stress load in the end, and the creep time is also the same during the loading procedure. However, in the process of one-time stress load, the deformation of the specimen which is crept first is smaller than that of the specimen which is loaded first, and in the process of grading stress load, the deformation of the specimen whose loading sequence is load-creep-load is smaller than that of the specimen whose loading sequence is load-load-creep. This conclusion can offer certain reference for the construction schedule of the long-period high embankment engineering. A one-dimensional creep formula proposed by Yao Yang-ping et al. is able to reflect the dependency of
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t loading sequence for the loess deformation, and the 5 parameters this formula requires can be obtained easily.
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