基于分形理论的红层软岩崩解性消除方法研究  

Research on Methods of Eliminating the Slacking Properties of Red Beds Soft Rock Based on Fractal Theory

作　　者：刘晓明[1] 徐汉飞[1] 赵明华[1] 

机构地区：[1]湖南大学土木工程学院,湖南长沙410082

出　　处：《湖南大学学报（自然科学版）》2013年第6期27-32,共6页Journal of Hunan University:Natural Sciences

基　　金：国家自然科学基金资助项目(50808076)

摘　　要：应用分形理论对自然崩解过程中的红层软岩粒度数据进行了分析,得到红层软岩崩解物分数维达到2.6～2.7后其崩解趋于停滞的特点.在研究了液压破碎锤、拖式羊足碾等设备对红层软岩的破碎能力后,基于分形图形构造过程中的'迭代'特征,提出了以'翻松—碾压'动作'迭代'为核心机制的消除红层软岩崩解性机械破碎工艺并在湖南省浏醴高速公路进行了现场破碎试验.对现场破碎过程中软岩粒度数据进行的分数维计算表明:重复2次'翻松—碾压'工艺即可将红层软岩破碎至分数维为2.6～2.7.因此,基于分形迭代特征开发的机械破碎工艺可有效消除红层软岩的崩解性.该方法应用在高速公路施工中可将红层软岩填筑利用范围扩大至上路堤,能取得较好的效益.By using fractal theory,the analysis of the particle size distribution of the slacking products of red beds soft rock in nature environments shows that the slack process tends to stagnate when the fractal dimension value reaches the interval of 2.6～2.7.After analyzing the crushing ability of hydraulic breaking hammer and sheep-foot roller on red beds soft rock,the mechanical crushing technology to aim at eliminating the slacking properties of red beds soft rock was proposed.The core of this technology is＂milling and compressing＂action,which is based on the unique iteration character in the process of creating a fractal figure.On-site experiments on the technology were conducted subsequently on Liu-Li Expressway.Calculation results of the fractal dimension value on the particle size distribution data of soft rock material show that 2times of＂milling and compaction＂action can crush the red beds soft rock to the extent that its fractal dimension value can reach the interval of 2.6～2.7.The results verified the mechanical crushing technology developed based on the fractal iteration character,which could eliminate the slacking properties of red beds soft rock.The crushing technology has been applied in the expressway construction process and can extend the application of red beds soft rock material from the lower embankment to the upper embankment.

关 键 词：红层 软岩 迭代 破碎 分形 

分 类 号：TU458[建筑科学—岩土工程]