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利用连续级配土的级配方程,对规范建议的剔除法、相似级配法、等量替代法和混合法缩尺后的级配计算进行了理论推导,并得出了一个统一的计算方程,同时揭示了该方程的4个参数d_(max),b,m和C与原级配方程参数d_(0max),b_0和m0之间存在的定量关系。结果表明:4种方法的新参数m=m0,剔除法和相似级配法C=0,剔除法和等量替代法b=b_0×P_(dmax)~0/100,等量替代法C与P_(dmax)~0和细颗粒含量P_5有关;与规范相比,可以简化级配缩尺计算,特别是对于混合法,可以先直接确定缩尺后的细颗粒含量P_5,通过一次计算即可得到缩尺后的级配方程,且其参数b和C都与所确定的P_5有关;缩尺后的统一方程揭示了各缩尺后的级配参数与原级配参数间的关系,在一定程度上使得定量、系统地研究缩尺效应成为可能。最后,利用该统一方程对糯扎渡堆石料的4种缩尺级配进行了计算演示,本方法与按规范计算结果基本一致。
Based on the gradation equation of continuous gradation soil, the theoretical calculation of gradation calculation based on the proposed rejecting method, the similar gradation method, the equivalent replacement method and the hybrid method is carried out, and a unified calculation equation The quantitative relationship between the parameters d_ (max), b, m and C of the equation and the parameter d_ (0max), b_0 and m0 of the original equation is also revealed. The results show that the new parameters m = m0, culling method and similar grading method C = 0, the culling method and equivalent replacement method b = b_0 × P_ (dmax) ~ 0/100, P_ (dmax) ~ 0 is related to the fine particle content P_5. Comparing with the standard, it is possible to simplify the calculation of gradation scale. Especially for the mixing method, the content of fine particles after scaling can be directly determined by P_5. The scale formula after scaling is obtained, and the parameters b and C are all related to the determined P_5. The unified equation after scaling reveals the relationship between the grading parameters and the original grading parameters after each scale. To a certain extent, it is possible to study the scale effect quantitatively and systematically. Finally, four uniform scales of Nuozhadu rockfill material are calculated and calculated by using the unified equation, which is basically consistent with the results calculated according to the standard.