【摘要】：選用兩項工程筑壩堆石材料,將原級配堆石料按不同的縮尺方法和不同最大控制粒徑進行縮尺,并對同種堆石材料選取相同的相對密度控制指標,研究了縮尺后堆石材料壓縮特性的變化規(guī)律和級配特征對壓縮特性影響規(guī)律。結果表明:縮尺后堆石材料的壓縮模量隨縮尺后最大粒徑和各特征粒徑的增大而減小,粒徑增大約3倍,壓縮模量減小幅度可達約1/2,隨原級配最大粒徑的增加,縮尺后材料的控制粒徑對壓縮模量的影響更為顯著;縮尺后材料級配的不均勻系數(shù)越大,壓縮模量越小,曲率系數(shù)越大,壓縮模量越高,采用等量替代法縮尺獲得的堆石材料壓縮模量隨粒徑增大的減小幅度大于采用相似級配法后的值。對于不同的堆石材料,由于母巖巖性以及材料原級配等方面存在差異,研究成果有待更多驗證。
[Abstract]:In this paper, two kinds of rockfill materials for dam construction are selected to scale the original graded rockfill according to different scaling methods and different maximum controlled particle sizes, and the same relative density control index is chosen for the same rockfill material. The variation law of compression characteristics and the influence of gradation characteristics on compression characteristics of rockfill materials after scaling are studied. The results show that the compression modulus of the rockfill material decreases with the increase of the maximum particle size and the characteristic particle size, the particle size increases about 3 times, the compression modulus decreases by about 1 / 2, and increases with the increase of the original gradation maximum particle size. The effect of the controlled particle size on the compression modulus is more significant. The larger the uneven coefficient of material gradation, the smaller the compression modulus, the bigger the curvature coefficient and the higher the compression modulus. The compression modulus of the rockfill material obtained by the equivalent replacement scale decreases with the increase of the particle size and is larger than the value obtained by the similar gradation method. For different rockfill materials, due to the difference of parent rock lithology and material original grading, the research results need more verification.
【作者單位】： 中國水利水電科學研究院流域水循環(huán)模擬與調控國家重點實驗室;
【基金】：國家“十二五”科技支撐項目(2013BAB06B02) 國家重點基礎研究發(fā)展計劃(“973”計劃)(2013CB036404) 中國水利水電科學研究院優(yōu)秀青年科技人員科學研究專項資金項目(GE0145B102016)
【分類號】：TV41

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