›› 2010, Vol. 31 ›› Issue (11): 3435-3440.

• Fundamental Theroy and Experimental Research • Previous Articles     Next Articles

A method for describing microstructure of clay rebuilding in process of one-dimensional consolidation

LI Shun-qun 1, 2，GAO Ling-xia3，CHAI Shou-xi 1, 2，WANG Ying-hong4，LIU Shuang-ju 1, 2   

  1. 1. Department of Civil Engineering, Tianjin Institute of Urban Construction, Tianjin 300384, China; 2. Tianjin Key Laboratory of Soft Soil Characteristics and Engineering Environment, Tianjin Institute of Urban Construction, Tianjin 300384, China; 3. School of Civil and Architecture Engineering, Dalian Nationalities University, Dalian, Liaoning 116600, China; 4. Department of Electronic & Information Engineering, Tianjin Institute of Urban Construction, Tianjin 300384, China
  • Received:2009-01-21 Online:2010-11-10 Published:2010-11-24

PDF (Chinese)

2342

Abstract:

Vacuum freeze drying method is utilized to prepare samples for SEM from one-dimensional consolidated clay, which is originally remolded and subsequently suffered the 5 grade pressures respectively. And then, simple and synthetical microstructure parameters of SEM photos obtained from horizontal, 45o inclined and vertical plane are studied to discover relation between macroscopical mechanics and micro structure. Study of simple parameters shows that grain area ratio and perimeter increase with consolidation pressure while other parameters have no constant tendency. Synthetical parameters come from two data analysis methods, namely principal component analysis and pedigree cluster analysis. It is shown that the first principal component approximately linearly increases with consolidation pressure. Samples can be exactly clustered into several families according to the pressure; and inner distance of a family nonlinearly increases with pressure. Synthetical parameter is distinctly superior to simple parameter in study of soil mechanics because the former can reflect the whole microstructure qualities; but the latter can’t.

Key words: one-dimensional consolidation, microstructure rebuilding, principal component analysis, pedigree cluster analysis

CLC Number: 

  • TU 411.92
[1] TONG Li-hong, WANG Jue, GUO Sheng-gen, ZHU Huai-long, XU Chang-jie, . One-dimensional consolidation characteristics of viscoelastic foundation with continuous drainage boundary under time- dependent loading [J]. Rock and Soil Mechanics, 2019, 40(5): 1862-1868.
[2] MENG Yu-han, CHEN Zheng, FENG Jian-xue, LI Hong-po, MEI Guo-xiong, . Optimization of one-dimensional foundation with sand blankets under the non-uniform distribution of initial excess pore water pressure [J]. Rock and Soil Mechanics, 2019, 40(12): 4793-4800.
[3] CHENG Shuai, LI Shu-cai, LI Li-ping, SHI Shao-shuai, ZHOU Zong-qing, YUAN Yong-cai. Identification method of water inrush status based on multiple monitoring information fusion analysis [J]. , 2018, 39(7): 2509-2517.
[4] ZHOU Ya-dong, DENG An, LU Qun, . A one-dimensional consolidation model considering large strain for unsaturated soil [J]. , 2018, 39(5): 1675-1682.
[5] WANG Lei, LI Lin-zhong, XU Yong-fu, XIA Xiao-he, SUN De-an，. Analysis of one-dimensional consolidation of fractional viscoelastic saturated soils with semi-permeable boundary [J]. , 2018, 39(11): 4142-4148.
[6] LIN Cheng-fu, LEI Guo-hui, . Responses of negative excess pore water pressure under unloading in one-dimensional swelling tests [J]. , 2017, 38(12): 3613-3618.
[7] XIE Yi, LI Pei-chao, WANG Lei, SUN De-an，. Semi-analytical solution for one-dimensional consolidation of viscoelastic saturated soil with fractional order derivative [J]. , 2017, 38(11): 3240-3246.
[8] HUANG Dan, LI Xiao-qing. Numerical simulation research on characteristic strength of marble based on development of microcrack [J]. , 2017, 38(1): 253-262.
[9] QIAN Zhao-ming, REN Gao-feng, CHU Fu-jiao, QIN Shao-bing, . Rock mass quality classification based on PCA and Fisher discrimination analysis [J]. , 2016, 37(S2): 427-432.
[10] GONG Feng-qiang , LI Jia-wei,. Discrimination model of sandy soil liquefaction based on PCA-DDA principle and its application [J]. , 2016, 37(S1): 448-454.
[11] QIN Ai-fang，ZHANG Jiu-long. Analysis of consolidation of unsaturated soil with variable permeability coefficient [J]. , 2015, 36(6): 1521-1528.
[12] LI Ji-wei ，WANG Hua-bin ，ZHANG Ling , . Series solution to one-dimensional consolidation in unsaturated soils based on the homology analysis method [J]. , 2014, 35(6): 1795-1800.
[13] LIN Cun-gang, WU Shi-ming, ZHANG Zhong-miao ,LIU Jun-wei,LI Zong-liang . Influences of shield advance rate and abnormal machine halt on tunnelling-induced ground surface settlements [J]. , 2012, 33(8): 2472-2482.
[14] LI Chuan-xun , XIE Kang-he , LU Meng-meng , MIAO Yong-hong , XIE Gui-hua . Analysis of one-dimensional consolidation of double-layered soil with exponential flow considering time-dependent loading [J]. , 2012, 33(5): 1565-1571.
[15] SHI Yong-qiang , ZHAO Jian-bin , YANG Jun. Optimized neural network model for predicting ultimate bearing capacity of statically-pressured pipe pile based on principal component analysis [J]. , 2011, 32(S2): 634-640.
Viewed
Full text


Abstract

Cited
  Shared   
  Discussed   
[1] XIANG Tian-bing, FENG Xia-ting, CHEN Bing-rui, JIANG Quan, ZHANG Chuan-qing. Rock failure mechanism and true triaxial experimental study of specimens with single structural plane under three-dimensional stress[J]. , 2009, 30(10): 2908 -2916 .
[2] WEN Shi-qiang, CHEN Yu-min, DING Xuan-ming, ZUO Wei-long. Application of grouted gravel pile in soft subgrade improvement of expressway[J]. , 2010, 31(5): 1559 -1563 .
[3] ZHANG Chang-guang，ZHANG Qing-he，ZHAO Jun-hai. Unified solutions of shear strength and earth pressure for unsaturated soils[J]. , 2010, 31(6): 1871 -1876 .
[4] YANG Tian-hong, CHEN Shi-kuo, ZHU Wan-cheng, LIU Hong-lei. Coupled model of gas-solid in coal seams based on dynamic process of pressure relief and gas drainage[J]. , 2010, 31(7): 2247 -2252 .
[5] HU Xiu-hong，WU Fa-quan. Research on two-parameter negative exponential distribution of discontinuity spacings in rock mass[J]. , 2009, 30(8): 2353 -2358 .
[6] LI Wei-chao, XIONG Ju-hua, YANG Min. Improved method for calculating anti-overturning safety factor of cement-soil retaining wall in layered soil[J]. , 2011, 32(8): 2435 -2440 .
[7] ZHANG Gui-min , LI Yin-ping , SHI Xi-lin , YANG Chun-he , WANG Li-juan. Research on a model material preparation method for alternate layered rock mass and preliminary experiment[J]. , 2011, 32(S2): 284 -289 .
[8] WANG Wei LI Xiao-chun LI Qiang SHI Lu WANG Ying BAI Bing. Small size in-situ transient pulse permeability measurement system and its experimental research[J]. , 2011, 32(10): 3185 -3189 .
[9] ZHA Fu-sheng, XU Long, CUI Ke-rui. Strength characteristics of heavy metal contaminated soils stabilized/solidified by cement[J]. , 2012, 33(3): 652 -658 .
[10] LI Shu-cai , ZHAO Yan , XU Bang-shu , LI Li-ping , LIU Qin , WANG Yu-kui . Study of determining permeability coefficient in water inrush numerical calculation of subsea tunnel[J]. , 2012, 33(5): 1497 -1504 .
Copyright © Rock and Soil Mechanics, All Rights Reserved.
Tel: 027-87198484, 87199252, 87199253, 87198752　E-mail: ytlx@whrsm.ac.cn
Powered by Beijing Magtech Co. Ltd