古树包滑坡滑带土蠕变经验模型

EMPIRICAL CREEP MODEL FOR SLIPPED ZONE SOIL OF GUSHUBAO LANDSLIDE

针对清江古树包滑坡滑带土的室内蠕变试验资料,结合经验模型理论,以双曲线函数描述蠕变应力-应变关系,并引入Morgan Mercer Florin函数,用来描述应变-时间关系,建立了一种新的蠕变经验模型。采用ε/D--ε关系曲线和遗传算法求解出了该模型的所有参数。经过计算,所建经验模型的计算结果与实际实验数据的相关系数在0.96以上,说明所建经验模型能有效地反映古树包滑坡滑带土的蠕变特性。

Based on the creep test data of the slipped zone soils of the Gushubao landslide and experience theory,a new empirical-creep model has been developed.The hyperbolic function is adopted for shear stress-strain behavior and the Morgan Mercer Florin function for strain-time behavior.Parameters of this creep model are presented in this paper by using of the ε/ versus ε curve and genetic algorithm.Fitting results show that the predicted results are in reasonable agreement with the experimental data.The correlation coefficients of the fitting curves are all above 0.96,which indicates that this creep model can effectively reflect the creep characteristics of the slipped zone soils of Gushubao landslide.