Journal of Guangdong University of Technology ›› 2017, Vol. 34 ›› Issue (04): 41-46.doi: 10.12052/gdutxb.160177

Previous Articles     Next Articles

A Research on Microscopic Parameters of Soft Soil Pore Based on Fractal Theory in the Process of Consolidation

Zhou Hui, Wu Jun-hua   

  1. School of Civil Engineering and Architecture, Guangzhou City Construction College, Guangzhou 510925, China
  • Received:2016-12-19 Online:2017-07-09 Published:2017-07-09

Abstract:

As the microstructure of soil is politropic and heterogeneous, the microstructure of soil can be simulated by fractal model and described with fractal parameters. The Pearl River Delta(PRD) soft soil environmental scanning electron microscope (ESEM) pictures are tested and the change of microscopic features in the process of soft soil consolidation analyzed based on the Sierpinski fractal model. A parameter which reflects the size, shape, distribution and orientation in the alignment of soft soil pore is defined and this parameter named as impact factor of pore. The research shows that this parameter can give a correct evaluation to the change of soft soil pore. There is an obvious relativity between this parameter and the consolidation load, the permeability coefficient and the compression coefficient. The parameter of natural soil is larger than the remolded soil in the same consolidation load, but they are equal when the load is large enough. The parameters which come from different areas would be the same when the consolidation load is large enough and approximates 18.

Key words: soft soil in Pearl River Delta(PRD), pore microscopic parameters, fractal theory

CLC Number: 

  • TU411.92

[1] 周晖. 珠江三角洲软土显微结构与渗流固结机理研究[D]. 广州: 华南理工大学土木与交通学院, 2013.
[2] BARTOLI F, PHILIPPY R, DOIRISSE M, et al. Structure and self-similarity in silty and sandy soils: The fractal approach [J]. Journal of Soil Science, 1991, 42(2): 167-185.
[3] 王大鹏, 王秋兵, 韩春兰, 等. 辽宁省古红土颗粒分形特征研究[J]. 安徽农业科学, 2007, 35(20): 6186-6189.WANG D P, WANG Q B, HAN C L, et al. Study of fractal features of paleosol in Liaoning Province [J]. Journal of Anhui Agricultural Sciences, 2007, 35(20): 6186-6189.
[4] 伍丢峰. 土颗粒粒径分维值与土的粘聚力的关系[J]. 湖南水利水电, 2007(2): 23-24.WU D F. Soil particle size fractal value and the cohesive soil [J]. Hunan Hydropower, 2007(2): 23-24.
[5] 张佑林, 夏家华, 黎国华, 等. 粉体颗粒的形状与分维[J]. 武汉工业大学学报, 1996, 18(4): 53-56.ZHANG Y L, XIA J H, LI G H, et al. The particle shape and fractal dimension [J]. Journal of Wuhan University of Technology, 1996, 18(4): 53-56.
[6] 谢和平, 薛秀谦. 分形应用中的数学基础与方法[M]. 北京: 科学出版社, 1997: 68-79.
[7] 蔡建超, 胡祥云. 多孔介质分形理论与应用[M]. 北京: 科学出版社, 2016: 55-80.
[8] ZHOU H, YAN W F. Sierpinski Fractal Characteristics of Consolidation of Soft Characteristics [J]. The Electronic Journal of Geotechnical Engineering, 2016, 21(11): 4111-4119.
[9] 刘勇健, 刘湘秋, 刘雅恒, 等. 珠江三角洲软土物理力学性质对比分析[J]. 广东工业大学学报, 2013, 30(3): 30-36.LIU Y J, LIU X Q, LIU Y H, et al. A contrastive analysis of the physico-mechanical properties of soft soils in the Pearl River Delta [J]. Journal of Guangdong University of Technology, 2013, 30(3): 30-36.
[10] 刘勇健, 符纳, 陈创鑫, 等. 三轴冲击荷载作用前后软黏土的微观结构变化研究[J]. 广东工业大学学报, 2015, 32(2): 23-27.LIU Y J, FU N, CHEN C X, et al. Study on microstructure changes of soft clay before and after triaxial impact load [J]. Journal of Guangdong University of Technology, 2015, 32(2): 23-27.
[11] 施斌. 粘性土微观结构定向性的定量研究[J]. 地质学报, 1997, 71(1): 36-44.SHI B. Quantitative research on the orientation of microstructure of clayey soil [J]. Acta Geologica Sinica, 1997, 71(1): 36-44.
[12] ZHOU H, FANG Y G, GU R G, et al. Microscopic analysis of saturated soft clay in Pearl River Delta [J]. Journal of Central South University of Technology, 2011, 18(2): 504-510.
[13] 周晖, 李勇. 珠江三角洲区域软土的物理力学指标研究与分析[J]. 矿产与地质, 2015, 29(6): 116-119.ZHOU H, LI Y. Analysis on physical mechanic indexes of soft soil in Pearl River Delta Region[J]. Mineral Resources and Geology, 2015, 29(6): 116-119.
[14] 刘春, 王宝军, 施斌, 等. 基于数字图像识别的岩土体裂隙形态参数分析方法[J]. 岩土工程学报, 2008, 30(9): 1383-1388.LIU C, WANG B J, SHI B, et al. Analytic method of morphological parameters of cracks for rock and soil based on image processing and recognition [J]. Chinese Journal of Geotechnical Engineering, 2008, 30(9): 1383-1388.
[15] ZHOU H, FANG Y G, GU R G. Modified consolidation model and calculation of soft soil based on microcosmic test [J]. The Electronic Journal of Geotechnical Engineering, 2015, 20(17): 9725-9734.
[16] ZHOU H, FANG Y G, LIANG J W, et al. Renguo Gu*. Influence of Mineral Constituents for Fine Clay’s Strength Characteristics [J]. The Electronic Journal of Geotechnical Engineering, 2015, 20(17): 9717-9724.
[17] 周晖, 房营光, 梁健伟, 等. 微电场效应对土体渗透特性的影响研究[J]. 桂林理工大学学报, 2015, 35(4): 845-849.ZHOU H, FANG Y G, LIANG J W, et al. The research of the micro electric field effect on the soil permeability characteristics [J]. Journal of Guilin University of Technology, 2015, 35(4): 845-849.

No related articles found!
Viewed
Full text


Abstract

Cited

  Shared   
  Discussed   
No Suggested Reading articles found!