岩土力学Issue(11)：3180-3186,7.DOI:10.16285/j.rsm.2015.11.019
降雨条件下松散堆积体边坡稳定性离心模型试验研究
Centrifugal modeling tests on stability of deposits slope under rainfall
摘要
Abstract
In this study, a new media atomizing nozzle was adopted by rainfall simulation equipment for centrifugal model tests. Three comparative tests were conducted to simulate the behaviors of the deposits slope under the conditions of the rainfall and grid support. The scale of the centrifuge model to prototype was selected as 1:80. The displacement field of deposits slope was measured by a high-speed flash photography system, which had characteristics of non-contact and fixed-spot and was combined with program of particle image velocimetry (PIV). It was found that deposits slope was very stable without rainfall, but with increasing rainfall time, the settlement at top of slope and the horizontal displacement at surface of slope were both enlarged. Particularly, obvious deformation was observed on the surface of slope. Under continuous intensive rainfall, the slope failure mode was different from the traditional circular slide, since the slope failed layer by layer until a‘debris flow’ was generated. However, the stability of the slope was significantly enhanced once protective geogrids were applied. Thus the application of geogrid supports efficiently improve the slope stability under rainfall conditions.关键词
松散堆积体/边坡/降雨/离心模型/PIVKey words
deposit/slope/rainfall/geotechnical centrifugal model/PIV分类
建筑与水利引用本文复制引用
田海,孔令伟,李波..降雨条件下松散堆积体边坡稳定性离心模型试验研究[J].岩土力学,2015,(11):3180-3186,7.基金项目
中国科学院重点部署项目（No.KZZD-EW-05）。@@@@Project supported by the Key Research Program of the Chinese Academy of Sciences (Grant No.KZZD-EW-05) （Grant No.KZZD-EW-05）
