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使用LGD-Ⅲ型非饱和土水分量测量系统,对室内边坡模型在不同降雨历时、不同降雨强度下、不同时刻边坡内部含水率变化规律做了深入的试验研究,得出坡面在降雨期间土体从非饱和到饱和,降雨结束静置24 h后土样又从饱和状态到非饱和状态的过程,这是降雨停止后水分由土水势高的坡面向土水势低的坡体内运移的结果所致;无论降雨期还是降雨停止24 h后,大量的水分积聚在坡脚到距坡脚1/3处,这部分在降雨期间还是雨后都是吸力减小较大,土坡强度减小最快的地方,是路坡发生破坏的薄弱部位,应进行相应工程处治和加强坡脚排水。
Using the LGD-Ⅲ unsaturated soil moisture content measuring system, the interior slope model is experimentally studied in different slope rains with different rainfall intensities and different times, During the period from non-saturation to saturation, the soil samples from saturated to unsaturated state after rainfall ended for 24 h were the intra-slope migration of soil moisture from high soil-water potential to low soil-water potential after rainfall stopped The result is that a large amount of water accumulates at the foot of the slope from the foot to the foot of the slope at 1/3 of the slope no matter during the rainfall period or after the rainfall stops for 24 hours. This part has a great decrease of the suction during the rainfall or after the rain, The places with the fastest reduction are the weak parts where the roadsides are damaged. Corresponding engineering treatments should be carried out and drainage at the footings should be strengthened.