高土石坝工程中，堆石料破碎和渗透特性是影响坝料物理力学特性的重要指标。本文选取玉龙喀什水电站缩尺堆石料为研究对象，通过室内振碾试验，探究不同振碾时长下堆石料的颗粒破碎、渗透系数等参数的变化规律。根据颗粒级配曲线建立三维结构模型，并对其进行渗流模拟，对比不同振碾时长下堆石料的孔隙结构、渗透特性的变化，并与室内试验进行对比，最后对影响渗透系数的部分参数进行拟合分析，获得了渗透系数的计算公式。研究结果表明：在振碾作用下，堆石料颗粒级配曲线变缓、颗粒排列更加紧密，孔隙率及渗透系数减小，水流在孔隙结构中流动更加缓慢，建立的三维结构模型较好地反映了这一过程。

In high earth and rock dam engineering, the particle breakage and permeability characteristics of rockfill materials are important indicators that affect the physical and mechanical properties of dam materials. Indoor vibration tests were conducted on the scaled-down rockfill materials of Yulongkashi Hydropower Station to investigate the variations of parameters such as particle crushing and permeability coefficient of the rockfill materials under different vibration times.A three-dimensional structural model was established based on the particle size distribution curve, and seepage simulation was conducted on it. Changes in the pore structure and permeability characteristics of rockfill materials under different vibration and compacting durations were compared, and they were also compared with indoor experiments. Finally, some parameters affecting the permeability coefficient were subjected to fitting analysis, and the calculation formula for the permeability coefficient was obtained. The research results indicated that under the influence of vibration and compacting, the particle size distribution curve of the rockfill material became smoother, the particle arrangement became more compact, porosity, and permeability coefficient decreased, and water flow within the pore structure slowed down. The established three-dimensional structural model well reflected this process.

TU375.4

新疆葛洲坝玉龙喀什水利枢纽开发有限公司科研项目(YLKS-SW-2022-016)