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人工模拟堆石料的颗粒破碎率试验研究

发表时间:2009-02-28  浏览量:1669  下载量:631
全部作者: 孔德志,张其光,张丙印,孙逊
作者单位: 清华大学土木水利学院,水沙科学与水利水电工程国家重点实验室
摘 要: 天然堆石料的颗粒破碎率不易准确测量。对一种人工模拟堆石料进行了系列的颗粒破碎三轴试验研究,并对试验后试样颗粒破碎的情况进行了详细筛分和统计。发现颗粒破碎后可区分为残缺颗粒和完全破碎颗粒两种类型,两者的质量百分数存在幂函数关系。以颗分曲线为基础的颗粒破碎率指标不能考虑残缺破碎颗粒的影响,但同总体的体积破碎率存在对应关系,仍可以作为颗粒破碎的影响参量使用,而已有单一粒径破碎指标的局限性较大。
关 键 词: 岩土工程;人工模拟堆石料;常规三轴试验;颗粒破碎;破碎率
Title: Experimental study on particle breakage ratio of artificial simulated rockfill materials
Author: KONG Dezhi, ZHANG Qiguang, ZHANG Bingyin, SUN Xun
Organization: State Key Laboratory of Hydroscience and Engineering, School of Civil Engineering, Tsinghua University
Abstract: It is difficult to measure the particle breakage ratio of natural rockfill materials precisely, so a series of triaxial tests on artificial simulated rockfill materials were performed and the particle breakage situation of samples after tests was sieved in detail and statistically analyzed. The test results show that fragmentary particle and completely cracked particle can be distinguished after particle crushed and the relationship between their mass percentages exists a power function. Although the influence of the fragmentary particle can’t be considered, the particle breakage ratio index based on the grain-size distribution curve is also used as a parameter of particle breakage, but the single grain-size breakage index has severe limitation.
Key words: geotechnical engineering; artificial simulated rockfill materials; conventional triaxial test; particle breakage; breakage ratio
发表期数: 2009年2月第4期
引用格式: 孔德志,张其光,张丙印,等. 人工模拟堆石料的颗粒破碎率试验研究[J]. 中国科技论文在线精品论文,2009,2(4):352-358.
 
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