中文摘要：

多碎石的土壤由石子，沙，淤泥和泥土组成。他们广泛地在与泥土核心设计象摇充满水坝那样的应用被使用，它目前是主要研究。力量和多碎石的土壤的机械性质被粗糙的谷物，好粒子，和他们的粘合剂状态的内容影响。这些性质能被实验室 unconsolidatedundrained triaxial 测试与谷物验证缩放不到 5 公里并且由有原来的谷物的大规模直接砍测试满足。松开的多碎石的斜坡的好粒子在降雨下面被释放，轮流出现结构和机械性质，甚至影响了斜坡稳定性。有有不同粗糙的谷物内容的一系列大规模直接砍测试学习好粒子释放和移植的影响，结果证明多碎石的土壤的力量行为被粗糙的谷物内容(P 5 ) 和变化影响粗糙的谷物内容。为了学习多碎石的土壤的侵蚀特征，在降雨条件和斜坡稳定性改变上倾斜，我们执行了一个种人工的降雨本地人和模型实验，流量沉积内容在实验期间被监视。结果证明斜坡表面的形状周期性地转变了，流量沉积内容根据实验现象被划分成五个阶段，流量沉积内容在雨时间期间维持了落之趋势，落之趋势被一个显然解释下带不管降雨紧张和斜坡天使。粒子尺寸分析在斜坡表面上释放了存款泥土失去了几乎所有，大多数在实验以后的淤泥和沙，这意味着释放的好粒子，降雨的状况上的移植和累积过程导致了甚至导致的斜坡的不稳定性因素山崩或碎片流动。

英文摘要：

Gravelly soils are made up of gravel, sand, silt and clay. They are widely used in engineering applications such as rock-fill dams with clay cores, which are the main researches at present. The strength and mechanical properties of the gravelly soils are affected by the content of coarse grain, fine particles, and their adhesive states. These Properties can be verified by laboratory unconsolidated undrained triaxial tests with grain size less than 5 mm and by large scale direct-shear tests with original grain content. Fine particles of the loose gravelly slopes are released under rainfalls, alternated the structures and mechanical properties, even affected the slope stability. There are a series of large scale direct-shear tests with different coarse grain contents to study the influence of fine particles releasing and migration, results showed the strength behavior of the gravelly soils were affected by the coarse grain content （5） and the inflection coarse grain contents. In order to study the erosion features of the gravelly soil slopes on rainfall conditions and the slopes stability alteration, we had carried out one sort of artificial rainfall local and model experiments, the runoff sediment contents were monitored during the experiments. Result showed that the shapes of the slopes surface transformed periodically, runoff sediment contents were divided into five phases according to the experiment phenomena, runoff sediment contents maintained downtrend during the rain time and the downtrend was obviouslyinterpreted by one descend belt no matter the rainfall intensity and the slope angels. Particle size analysis released the deposit on the slope surface lost almost all of the clay, most of the silt and sand after the experiments, this meant the fine particles releasing, migration and accumulation process on condition of rainfall resulted in the instability factor of the slopes even induced landslide or debris flow.