摘要
针对广东某高速路堑边坡,研究不同降雨强度、历时以及不同坡面入渗量对边坡稳定性的影响。研究表明:当雨强越接近土体的饱和渗透系数时,边坡的安全系数越小;当雨强小于土体的饱和渗透系数时,长历时的降雨对边坡稳定性的影响小;等强型降雨条件下,非饱和土边坡在降雨结束后1 3 d安全系数达到最小。加固后的路堑边坡应强化并保持坡面阻水能力,否则可能出现非加固区浅表层滑塌。
Aimed at the analysis of some road slopes caused by the building of some Guangdong freeway,several factors on the unsaturated soil slopes stability have been studied,such as: rainfall intensity,rainfall duration and slope surface infiltration quantity,and it is concluded that: the closer is the rainfall intensity with the soil's saturated coefficient of permeability,the smaller is the slope's safety factor; when the rainfall intensity is far smaller than soil's saturated coefficient of permeability,the long time rainfall's influence on slope stability is faint; when the rainfall is uniform,the slope's safety factor will get minimum 1 - 3 days after rainfall. Unsaturated soil slopes after excavating should be reinforced on the slope surface for waterproof,otherwise some shallow slide will happen at the unreinforced area.
出处
《广东水利水电》
2014年第11期21-29,共9页
Guangdong Water Resources and Hydropower
关键词
非饱和土
土水特征曲线
雨型
入渗量
安全系数
unsaturated soil
soil-water characteristic curve
rainfall pattern
infiltration capacity
safety factor