堆石蠕变机理分析与颗粒破碎特性研究

根据大型压缩仪完成的堆石蠕变试验,结合颗粒破碎测试试验,对蠕变产生的机理进行了简要的理论分析,在力的作用下,细化破碎的堆石颗粒滑移充填孔隙是发生蠕变的重要原因。堆石颗粒的破碎可分为对应于主压缩变形的颗粒破碎和伴随蠕变变形的颗粒破碎。颗粒破碎引起堆石级配的细微改变,从而形成后期变形。

Creep mechanism and breakage behaviour of rockfill

The creep mechanism of rockfill is studied based on the creep test of large scale compression apparatus with breakage measurement. The main factor causing the creep deformation is that the pores are filled by the movement of smaller breakage rockfill under the effect for continuous compression deformation. The breakage of rockfill can be divided into two types, one is the breakdown under the main compression deformation and the other is under the creep strain. The breakage result in the change of rockfill gradation, furthermore, the long-term deformation is then induced.