滑带土参数变化对滑坡稳定性影响的数值模拟分析

Numerical Investigation of Change of Shear Strength Parameters in the Sliding Zone

随着国家经济的迅猛发展,基础设施的建设越发完善,对边坡原始地貌的人为改造打破了原本的平衡状态,进而诱发了一系列的斜坡地质灾害。以浏阳市某滑坡为背景,以含砾粉质黏土滑坡为研究对象,从滑坡体的渐进式破坏出发,着重分析研究滑带土参数的变化对滑坡整体稳定性的影响。在收集资料、现场详细勘察和室内试验的基础上,采用ABAQUS数值模拟软件建立地质模型,并从滑坡塑性区、位移和稳定性三个方面,对比不同滑带土的模拟结果,分析滑带土参数的变化对滑坡稳定性的影响,为该类型的滑坡防治提供参考。

With the rapid development of the economy,the construction of infrastructure has become more and more improved,and the artificial transformation of the original landform has been aggravated.Breaking the original balance of the slope might lead to a series of increasing slope geological hazards.This paper presents a case history of a landslide in Liuyang City.The landslide in the gravelly clay soils is focused on the analysis and study of the impact of the change of landslide soil parameters on the overall stability of the landslide based on the gradual failure of the landslide body.Based on the data collection,detailed on-site survey and laboratory testing,this paper uses ABAQUS numerical simulation software to establish a geological model,and compares the simulation results of different landslide soils from three aspects:plastic sliding area,displacement and stability.The impact of parameter changes on the landslide stability is thoroughly investigated.