天然裂隙土坡渐进变形解析

Analytical model for the progressive deformation of natural fissured slopes

首先介绍了一个结构性土的各向异性粘弹塑性模型,通过分析速度场与粘塑性应变率场的对应关系,建议了一个考虑天然土体结构破损及吸力影响的渐进变形解析模型。该模型能够考虑结构性、各向异性、粘滞性以及结构破损程度、裂隙发育程度(用吸力大小反映)等对边坡变形的影响。基于结构渐进破损变形原理,应用该模型分析天然裂隙土体的渐进变形破坏过程,并结合某土坡实测数据进行了对比分析。

An anisotropic elastic visco-plastic constitutive model for structured soils was suggested. A new analytical model for describing the progressive slow movement Of natural slopes was proposed, based on the relationship between velocity and visco-plastic strain rate. The destmcturation of natural soil and suction were taken into account in the model. The analytical model could be used to investigate the influence of anisotropy, viscosity, degree of destructuration and fissure on the slope deformation. On the basis of progressive deformation and structure damage theory, the progressive deformation and failure of natural fissured soil and the field behavior of a natural slope were predicted using this model combined with the observed data.