摘要
为研究公路边坡降雨侵蚀的特殊性以及土质边坡的可蚀性,通过观察分析,并利用自行研制的崩解仪进行了压实黄土浸水崩解试验。试验结果表明,公路边坡降雨侵蚀中的重力侵蚀所占比例较大,坡面土的崩解是主要分散方式。建立了有效空隙比与崩解速率的相关关系,说明压实度、含水量对崩解影响的本质,即压实度、含水量的变化可统一用土的有效空隙比说明崩解规律,回归公式可用于预测压实土的崩解速率。土的崩解性反映了压实土的可蚀性,通过对比得出,边坡上压实土的可蚀性可用崩解速率表征,在工程水土保持研究中可用崩解速率作为土的可蚀性评价指标。
In order to study the characteristic of road slope and soil erodibility, a soil disintegration instrument is developed to test compacted loess disintegration under water. It is pointed out that gravitational erosion is a main form of rainfall erosion, the soil disintegration is the key reason of incompactness behavior. The law of disintegration rate with moisture and level of compaction is described with residual voids content. The regressed formula can be used to calculate the disintegration rate of compacted loess. The results also show that disintegration rate is a reasonable index for estimate erodibility of compacted soil in civil engineering. 2 tabs, 5 figs, 10 refs.
出处
《长安大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2007年第1期23-26,49,共5页
Journal of Chang’an University(Natural Science Edition)
基金
国家西部交通建设科技项目(200131881234)
关键词
道路工程
降雨侵蚀
崩解
压实度
含水量
可蚀性
road engineering
rainfall erosion
soil disintegration
degree of compaction
moisture
soil erodibility
