摘要
为研究裂隙土体的力学性质和渗透特性,建立与实际情况近似的裂隙网络。首先,用测窗法对现场土体裂隙网络进行调查,统计得到其几何特征;然后,建立土体裂隙网络分形插值法的生成技术,编制程序得到分形插值网络并对其影响因素进行分析;最后,通过表征单元体积对生成裂隙网络的质量进行评价。研究结果表明,生成的裂隙网络与实际网络的表征单元体积相差不大。分形插值法生成的裂隙网络不仅能很好地反映土体裂隙的细部变化特征,而且整体分布特征与实际的形态较为接近。
In order to study the mechanical property and permeability of cracked soil,the crack network which approximated to real network was established.Firstly,the information of natural soil crack network was investigated by the sampling window method and the geometry features were obtained.Then,the generation method of soil crack network was proposed based on fractal interpolation theory.Meanwhile,the code was developed and the influence factor was discussed.Lastly,numerical examples were given to assess the quality of the generated crack network by representative elementary volume（REV）.The results show that the simulated representative elementary volume matches well with the one of real network.The crack network generated by the fractal interpolation method can represent the soil crack’s mesoscopic characteristics,and the global distribution approaches the soil real crack network.
出处
《中南大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2013年第3期1159-1166,共8页
Journal of Central South University:Science and Technology
基金
新世纪优秀人才支持计划(NCET-07-0253)
中央高校基本科研业务费专项资金资助项目(2011B07214)
教育部博士点基金资助项目(20090094110004)
关键词
土体裂隙网络
几何特征
分形插值
生成技术
表征单元体积
soil crack network
geometry characteristics
fractal interpolation
generation technology
representative elementary volume
