摘要
为了研究开挖和堆载对黄土边坡变形破坏特征的影响,采用原状黄土在离心机上模拟黄土边坡在开挖和堆载作用下的变形过程,得到了两种工况下黄土边坡的位移变化规律和破坏特征。位移矢量图表明:开挖和堆载前,坡体变形以自重应力作用下的竖向变形为主;开挖和堆载后,坡体中后部土体以垂直向下变形为主,前部土体变形以水平变形为主;对模型边坡控制点位移特征分析,发现开挖对前部土体变形影响较大,堆载对后部土体变形影响较大,但开挖是影响边坡变形的最主要因素;开挖和堆载作用下黄土边坡的变形过程完全不同。
In order to study the influence of excavation and loading on the characteristics of deformation and destruction of loess slope, undisturbed loess samples are chosen to carry out centrifuge model test. The test simulates the deformation process of loess slope under excavation and loading, and illustrates the variable law of displacement and failure characteristics of the loess slope. The results show that the vertical deformation under the self-weight stress is major in the whole loess slope before excavation and loading, however, after the loess slope is excavated or loaded, the deformation of the front and middle of the loess slope gradually changes from vertical to horizontal, the deformation of the behind of the loess slope is as the same as before. Meanwhile, through the analysis of displacement characteristics of control points in loess slope, it is pointed out that the excavation has an important influence on the deformation of the front of the loess slope, and the loading plays an important role on the deformation of the behind of the loess slope, but the former is more important. The deformation processes of the loess slope under excavation and loading are quite different.
出处
《工程勘察》
CSCD
北大核心
2007年第5期10-13,共4页
Geotechnical Investigation & Surveying
基金
交通部重点科技项目(95-05-05-13)
长安大学青年科学基金(06Q15)
关键词
黄土边坡
离心模型试验
变形特征
loess slope
centrifuge model test
deformation characteristics
