A loess accumulation dam in Ansai Area, Yan’an, Shaanxi province is selected as the research object, and the remolded soil of the dam body is taken as the test material to conduct the saturated loess indoor triaxial test. The test shows that the peak stress of saturated remolded loess increases with the enhancement of confining pressure and dry density, and the pore water pressure rises rapidly in the shear of the samples with a dry density of 1.4–1.6 g/cm³and gradually flattens out. When the samples with a dry density of 1.7 g/cm³ in the process of shearing, the pore pressure rises rapidly and then decreases as the volume increases. The total internal friction angle and effective internal friction angle increase with the augment of dry density, and the total cohesion and effective cohesion show a changing trend of first rising, then falling and then rising due to the different development of original cohesion, sliding friction and rolling friction. Meanwhile, combined with field monitoring, it can be determined that the dam a total of three times more obvious damage. According to the comparison of field test and laboratory test, the concept and calculation method of “inspection threshold” are put forward.

中文翻译：

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饱和条件下黄土坝材料的抗剪强度特性研究

以陕西延安安塞地区黄土蓄水坝为研究对象，以坝体重塑土为试验材料进行饱和黄土室内三轴试验。试验表明，饱和重塑黄土的峰值应力随着围压和干密度的增加而增加，孔隙水压力在干密度为1.4-1.6 g / cm ³的样品的剪切中迅速升高并逐渐变平。出来。当样品的干密度为1.7 g / cm ^3时在剪切过程中，孔隙压力迅速上升，然后随着体积的增加而减小。总内摩擦角和有效内摩擦角随着干密度的增加而增加，总内聚力和有效内聚力由于原始内聚力，滑动摩擦力和内摩擦力的不同发展呈现出先上升后下降然后上升的变化趋势。滚动摩擦。同时，结合现场监测，可以确定大坝总共有三倍以上的明显损坏。通过现场测试与实验室测试的比较，提出了“检查阈值”的概念和计算方法。