长江科学院院报2024，Vol.41Issue(11)：158-162,180,6.DOI:10.11988/ckyyb.20230644
软岩堆石料的击实特性与尺寸效应研究
Compaction Characteristics and Size Effects of Soft Rock Rockfill
摘要
Abstract
The dry density of soft rock rockfill is an important control index for the design and construction of earth-rock dams,as it directly influences the settlement of earth-rock dams during construction and operation.TheΦ950 mm×H1 000 mm super-large compactor was used to conduct compaction tests under five levels of compaction energy,including 483,992,1 475,1 957,2 681 kJ/m3,for the strongly weathered silty mudstone,weakly weath-ered silty mudstone,and a mixture of silty mudstone.The results were compared with those from φ300 mm × H285 mm large compaction test.The test results show that the dry density increases with the increase in compaction energy.When the compaction energy is less than 2 000 kJ/m3,the dry density increases rapidly with increasing the compaction energy.When the compaction energy exceeds 2 000 kJ/m3,the rate of increase slows down and the in-crement is small.Further increasing the compaction energy does not significantly improve the dry density.Under the same compaction energy,the maximum dry density from the ultra-large compaction is slightly lower(by 0.01 to 0.02 g/cm3)than that from the large compaction test.The size effect of soft rock rockfill on compaction characteris-tics is not significant,and under the heavy standard compaction functional conditions,it is appropriate to use a compaction instrument with a diameter of 300 mm to study the compaction characteristics of soft rock rockfill indoors.关键词
软岩堆石料/超大型击实/干密度/击实功/尺寸效应/破碎率Key words
soft rock rockfill/super-large compaction instrument/dry density/compaction energy/size effect/par-ticle crushing rate分类
建筑与水利引用本文复制引用
赵娜,左永振,陆世权,周跃峰,张婷..软岩堆石料的击实特性与尺寸效应研究[J].长江科学院院报,2024,41(11):158-162,180,6.基金项目
国家自然科学基金联合基金重点项目(U21A20158) （U21A20158）
中央级公益性科研院所基本科研业务费项目(CKSF2023318/YT) （CKSF2023318/YT）
