某滑坡滑带土应力-应变关系模型研究

通过巴东地区某滑坡滑带土的一系列物理性质试验以及不同剪切速率的滑带土重塑样的三轴固结不排水剪试验,确定了滑带土的岩土分类,分析了滑带土试样的应力-应变关系,利用试验数据对邓肯-张(Duncan-Chang)本构模型进行了曲线拟合,通过分析验证,认为Duncan-Chang模型的双曲线型关系能够较好地反映该滑坡滑带土的逐渐硬化类型的应力-应变特性,可以为该类型滑坡的数值模拟研究提供参考。

Stress-strain relationship model about sliding-zone soil of landslide

Based on a series of physical property tests and tri-axial consolidated undrained shear test of remodeling sample of sliding soil under different shear rates for the sliding-zone soil of a landslide in Badong area,this paper ascertains the soil classification of the sliding-zone soil,analyzes the stress-strain relationship about the sample of the sliding-zone soil and does the curve fitting of Duncan-Chang model using the experimental data.According to the analysis and validation,the paper considers that the hyperbolic relationship of Duncan-Chang model can better reflect the gradual hardening type of the type-strain characteristics about the sliding-zone soil of the landslide,and can provide reference for the numerical simulation study on the type of landslide.