摘要
以红土作为室内滑坡模型材料制作红土型边坡,考虑边坡尺寸、土体特性、成型方法、降雨等级的影响,开展降雨作用下红土型边坡的室内滑坡模型试验研究。试验结果表明,直接选用红土开展室内滑坡模型试验的成功率较低,但如果控制好试验条件,红土型边坡仍然可能发生滑坡。室内暴雨作用下,红土型边坡的滑动过程可以分为边坡成型、降雨实施、滑动面形成发展、整体滑动等几个阶段;其滑动特征表现为先坡顶开裂下沉、后坡侧开裂延伸;其滑动条件为坡高、坡角较大,坡顶宽适中,塑性指数偏小,干密度偏小,含水率接近塑限,堆积法成型以及暴雨等方面。
A feasibility study of the indoor test of the Yunnan laterite landslide was carried out under simulated rainfall conditions. In the study, the modeling material, the Yunnan laterite, was used to make lateritic slopes, and the effects of the size of the slope, the lateritic properties, the molding method, and the rainfall level were all considered. The tests results show that, the success rate is low if a laterite is directly selected for the indoor test. However, a lateritic slope landslide may occur if the test conditions are well controlled. Under the conditions of indoor rainstorms, the sliding process of the lateritic slopes can be divided into the following stages： the formation of the slope, the implementation of rainfall, the formation and development of the sliding surface, and the overall slide. The sliding characteristics can be expressed as cracking and sinking on the top of the slope first, and then cracking and extension on the sides of the slope. The conditions for sliding include larger values of the height and angle of the slope, a moderate width of the slope top, a lower plasticity index, a lower dry density, a moisture content of approaching the plastic limit, the stacked molding method, and a rainstorm.
出处
《河海大学学报（自然科学版）》
CAS
CSCD
北大核心
2014年第6期497-502,共6页
Journal of Hohai University(Natural Sciences)
基金
国家自然科学基金(50868009
51168022
51269006)
云南应用基础研究计划重点项目(2013FA033)
关键词
云南红土
室内滑坡可行性试验
滑动过程
滑动特征
滑动条件
Yunnan laterite
indoor landslide feasibility test
sliding process
sliding characteristics
sliding conditions
