考虑滑道坡度和宽度的滑坡模型试验研究  

Model test study of the effect of slope angle and chute width on landslide

作　　者：雷先顺 朱大勇[1,2] 刘诚[1] 卢坤林[1,2] 陈菊香[1,2] 

机构地区：[1]合肥工业大学土木与水利工程学院,安徽合肥230009 [2]合肥工业大学土木工程结构与材料安徽省重点实验室,安徽合肥230009 [3]湖北省电力勘测设计院,湖北武汉430040

出　　处：《岩土力学》2017年第5期1281-1288,共8页Rock and Soil Mechanics

基　　金：国家自然科学基金项目(No.51179043);水利部公益项目(No.201401063)~~

摘　　要：通过开展小尺寸的室内模型试验,研究了在不同滑道坡度和滑道宽度下,滑坡-碎屑流的运动和堆积特性。试验结果发现:斜坡坡度增大时,对于细颗粒堆积体,其冲程和平面覆盖面积均变大;对于粗颗粒堆积体,其冲程和平面覆盖面积均先变大后变小;两者的堆积宽度均减小、堆积厚度均增加。滑道宽度对滑坡运动影响显著,滑道宽度增加时,其冲程出现小幅度的增加,而平面覆盖面积和堆积宽度均出现较大幅度的增加,堆积厚度则变小;滑道出口宽度对滑体最终堆积范围影响显著,而滑道入口宽度的影响则相对较小。试验研究成果为滑坡-碎屑流堆积范围及堆积形态影响因素的探究提供了一定的理论参考价值。Laboratory model tests are performed to study the characteristics of movement and accumulation of landslide-debris under different constraints. The effects of the gradient of slope and the chute sidewall on the accumulation scope and accumulation characteristics are investigated. Testing results show that when slope angle increases, the final run-out and accumulation area increase for the fine particles deposit, but for the coarse particles deposit, they increase first and subsequently decrease. However, for both of deposits, the accumulation width decreases and the thickness increases. The landslide movement is obviously influenced by the chute width. With the increase of the chute width, the final run-out slightly increases, the accumulation area and width significantly increase, while the accumulation thickness becomes smaller. The chute outlet width is a significant factor to influence the final accumulation scope, while the influence of the chute entrance width is relatively small. Theoretically, experimental results contribute to the study of accumulation scope and the form of landslide-debris.

关 键 词：模型试验 滑坡-碎屑流 坡度 滑道宽度 堆积范围 

分 类 号：TU457[建筑科学—岩土工程]