级配缩尺对堆石压缩特性影响试验研究
发布时间：2018-10-29 14:22
【摘要】：选用两项工程筑坝堆石材料,将原级配堆石料按不同的缩尺方法和不同最大控制粒径进行缩尺,并对同种堆石材料选取相同的相对密度控制指标,研究了缩尺后堆石材料压缩特性的变化规律和级配特征对压缩特性影响规律。结果表明:缩尺后堆石材料的压缩模量随缩尺后最大粒径和各特征粒径的增大而减小,粒径增大约3倍,压缩模量减小幅度可达约1/2,随原级配最大粒径的增加,缩尺后材料的控制粒径对压缩模量的影响更为显著;缩尺后材料级配的不均匀系数越大,压缩模量越小,曲率系数越大,压缩模量越高,采用等量替代法缩尺获得的堆石材料压缩模量随粒径增大的减小幅度大于采用相似级配法后的值。对于不同的堆石材料,由于母岩岩性以及材料原级配等方面存在差异,研究成果有待更多验证。
[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.
【作者单位】： 中国水利水电科学研究院流域水循环模拟与调控国家重点实验室;
【基金】：国家“十二五”科技支撑项目(2013BAB06B02) 国家重点基础研究发展计划(“973”计划)(2013CB036404) 中国水利水电科学研究院优秀青年科技人员科学研究专项资金项目(GE0145B102016)
【分类号】：TV41
[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.
【作者单位】： 中国水利水电科学研究院流域水循环模拟与调控国家重点实验室;
【基金】：国家“十二五”科技支撑项目(2013BAB06B02) 国家重点基础研究发展计划(“973”计划)(2013CB036404) 中国水利水电科学研究院优秀青年科技人员科学研究专项资金项目(GE0145B102016)
【分类号】：TV41
【相似文献】
相关期刊论文 前10条
1 Б·А·培什京;胡中信;;堆石塷护土坡的，
本文编号：2297943
本文链接：https://www.wllwen.com/kejilunwen/shuiwenshuili/2297943.html
