垫层料的压实性及渗流稳定性试验研究  

Test and Research of Cushion Material Compactness and Seepage Flow Stability

作　　者：保华富[1] 谢正明[1] 忱蓉[1] 

机构地区：[1]中国水电顾问集团昆明勘测设计研究院科学研究分院,云南昆明650033

出　　处：《云南水力发电》2008年第3期76-81,共6页Yunnan Water Power

摘　　要：结合某水库面板堆石坝垫层料的现场检测成果，通过符合现场碾压工况的表面激振压实及高压渗变试验，论证了所提供垫层料压实控制密度的合理性及垫层料在高水头作用下的抗渗稳定性。虽然从防渗角度考虑，垫层料渗透系数偏大，然而垫层料在有反滤保护条件下，渗透坡降高达200～250未见破坏，具有较高的抗渗稳定性。由于试验级配比现场检测值偏粗，制样干密度又为垫层料现场检测的下限值，故可认为填筑的垫层料能满足工程抗渗稳定性的要求。This paper has expounded and verified the rationality of the given cushion material compacting control density and the impermeability of the cushion material under a high water head by conducting surface excitation compacting and high pressure permeability tests according to the site roller compaction operating conditions, taking into consideration the cushion material field test results of a specific concrete face rock fill dam. Although the coefficient of permeability of the cushion material is on the high side in temas of seepage control, no damage was found when the seepage gradient reached as high as 200 - 250 on the condition that the cushion material was protected by a filter. The cushion material proved to be quite impervious. Furthermore, the grain size of the material in the test gradation is larger than the field measured value and the dry bulk density used for preparing the specimen is the lower limit of the field test measured value of the cushion material. Therefore the cushion material is considered to meet the requirement for impermeability of the dam.

关 键 词：面板堆石坝 垫层料 检测 压实性 抗渗稳定性 

分 类 号：TV131.6[水利工程—水力学及河流动力学] TV640.31