›› 2013, Vol. 34 ›› Issue (10): 2796-2800.

• Fundamental Theroy and Experimental Research • Previous Articles     Next Articles

Initial structure of loess and its evolution under condition of stress and moisture

SHE Fang-tao1, 2, SHAO Sheng-jun1, 2, FAN Wen1   

  1. 1. Institute of Geotechnical Engineering, Xi’an University of Technology, Xi’an 710048, China; 2. Shaanxi Key Laboratory of Loess Mechanics and Engineering, Xi’an University of Technology, Xi’an 710048, China
  • Received:2013-04-19 Online:2013-10-09 Published:2013-10-18

PDF (Chinese)

1451

Abstract: Loess structure is more important mechanical properties of loess besides its particle size, density and humidity. Based on the theory of comprehensive structure potential, we made a synthesis of the existing structural parameters and their evolution, and structural parameter can be of two types: initial structural parameter and the process of structural parameter. Structural parameter tends to satisfy both the basic physical property of soil and its evolution under the condition of stress and moisture. Based on existing problem of structural parameters and their evolution, structure index is used to describe initial structure, and stress ratio structure parameter is used to describe the process of structure. The relationship between stress ratio structural parameter and comprehensive strain is studied. Finally, a mathematical model that can reflect the attenuation evolution of soil structure under the condition of initial stress and moisture is established. Theoretical analysis and triaxial test show that the model can avoid the influence of confining pressure under the condition of triaxial tests on initial structure, and it can consider the influence of body strain and shear strain under the process of stress and moisture. The model can more accurately reflect the damage evolution of loess.

Key words: loess, structure index, stress ratio structural parameter, initial structure, evolution

CLC Number: 

  • TU 475+.3
[1] GAO Feng, CAO Shan-peng, XIONG Xin, ZHOU Ke-ping, ZHU Long-yin, . Brittleness evolution characteristics of cyan sandstone under freeze-thaw cycles [J]. Rock and Soil Mechanics, 2020, 41(2): 445-452.
[2] FANG Jin-jin, FENG Yi-xin, WANG Li-ping, YU Yong-qiang, . Effective stress yielding behavior of unsaturated loess under true triaxial conditions [J]. Rock and Soil Mechanics, 2020, 41(2): 492-500.
[3] XIA Kun, DONG Lin, PU Xiao-wu, LI Lu. Earthquake response characteristics of loess tableland [J]. Rock and Soil Mechanics, 2020, 41(1): 295-304.
[4] ZHU Lei, HUANG Run-qiu, CHEN Guo-qing, YAN Ming, . Mechanical model and evolution of fracture system with a gentle dip angle in rock slope [J]. Rock and Soil Mechanics, 2019, 40(S1): 53-62.
[5] HE Peng-fei, MA Wei, MU Yan-hu, HUANG Yong-ting, DONG Jian-hua, . Experimental analysis of interfacial shear behavior of loess-mortar block and construction of constitutive model [J]. Rock and Soil Mechanics, 2019, 40(S1): 82-90.
[6] SONG Yong-jun, YANG Hui-min, ZHANG Lei-tao, REN Jian-xi. CT real-time monitoring on uniaxial damage of frozen red sandstone [J]. Rock and Soil Mechanics, 2019, 40(S1): 152-160.
[7] LIU Hua, ZHANG Shuo-cheng, NIU Fu-jun, SHAO Zhu-shan, NIU Ze-lin, LU Jie, . Experimental study on one-dimensional compression characteristics of Q3 loess contaminated by acid or alkali solutions [J]. Rock and Soil Mechanics, 2019, 40(S1): 210-216.
[8] ZHAI Ming-lei, GUO Bao-hua, WANG Chen-lin, JIAO Feng, . Compression-shear failure characteristics of rock with penetrated fracture under normal unloading condition [J]. Rock and Soil Mechanics, 2019, 40(S1): 217-223.
[9] CHEN Yong-qing, WEN Chang-ping, FANG Xuan-qiang, . Modified Yin’s double-yield-surface model for bioenzyme-treated expansive soil [J]. Rock and Soil Mechanics, 2019, 40(9): 3515-3523.
[10] ZHU Yan-peng, DU Xiao-qi, YANG Xiao-hui, LI Hui-jun, . Research on utility tunnel foundation treated by compaction piles and post-work immersion test in self-weight collapsible loess area with large thickness [J]. Rock and Soil Mechanics, 2019, 40(8): 2914-2924.
[11] CHENG Ai-ping, ZHANG Yu-shan, DAI Shun-yi, DONG Fu-song, ZENG Wen-xu, LI Dan-feng, . Space-time evolution of acoustic emission parameters of cemented backfill and its fracture prediction under uniaxial compression [J]. Rock and Soil Mechanics, 2019, 40(8): 2965-2974.
[12] DU Chang-cheng, ZHU Yan-bo, MIAO Shuai-sheng, GAO Ming-ming, ZHU Jun-hua, ZHAO Fa-suo. The evolution of cracks in the dewatering shrinkage process of hipparion red soil [J]. Rock and Soil Mechanics, 2019, 40(8): 3019-3027.
[13] FENG Jun, WANG Yang, WU Hong-gang, LAI Bing, XIE Xian-dang, . Field pullout tests of basalt fiber-reinforced polymer ground anchor [J]. Rock and Soil Mechanics, 2019, 40(7): 2563-2573.
[14] ZHU Ren-jie, CHE Ai-lan, YAN Fei, WEN Hai, GE Xiu-run, . Dynamic evolution of rock slope with connective structural surface [J]. Rock and Soil Mechanics, 2019, 40(5): 1907-1915.
[15] WANG Juan-juan, HAO Yan-zhou, WANG Tie-hang. Experimental study of structural characteristics of unsaturated compacted loess [J]. Rock and Soil Mechanics, 2019, 40(4): 1351-1357.
Viewed
Full text


Abstract

Cited
  Shared   
  Discussed   
[1] QU Wan-bo, LIU Xin-rong, FU Yan, QIN Xiao-ying. Numerical simulation of preliminary lining of large section crossing tunnels constructed with PBA method[J]. , 2009, 30(9): 2799 -2804 .
[2] LI Hua-ming, JIANG Guan-lu, LIU Xian-feng. Study of dynamic characteristics of saturated silty soil ground treated by CFG columns[J]. , 2010, 31(5): 1550 -1554 .
[3] GUO Bao-hua. Numerical analysis of hydraulic fracturing on single-holed rock specimens[J]. , 2010, 31(6): 1965 -1970 .
[4] TAN Yun-zhi, KONG Ling-wei, GUO Ai-guo, WAN Zhi. Capillary effect of moisture transfer and its numerical simulation of compacted laterite soil[J]. , 2010, 31(7): 2289 -2294 .
[5] WANG Sheng-xin, LU Yong-xiang, YIN Ya-xiong, GUO Ding-yi. Experimental study of collapsiblity of gravel soil[J]. , 2010, 31(8): 2373 -2377 .
[6] LONG Zhao，ZHAO Ming-hua，ZHANG En-xiang，LIU Jun-long. A simplified method for calculating critical anchorage length of bolt[J]. , 2010, 31(9): 2991 -2994 .
[7] LENG Yi-fei, ZHANG Xi-fa, YANG Feng-xue, JIANG Long, ZHAO Yi-min. Experimental research on unfrozen water content of frozen soils by calorimetry[J]. , 2010, 31(12): 3758 -3764 .
[8] WEI Xin-jiang，GUO Zhi-wei，WEI Gang，ZHANG Shi-min. Study of accident mechanism of shield launching considering seepage[J]. , 2011, 32(1): 106 -110 .
[9] DENG Zong-wei, LENG Wu-ming, LI Zhi-yong, YUE Zhi-ping. Finite element analysis of time effect for coupled problem of temperature and stress fields in slope supported by shotcrete[J]. , 2009, 30(4): 1153 -1158 .
[10] QI Jing-jing，XU Ri-qing，WEI Gang. Research on calculation method of soil 3D displacement due to shield tunnel construction[J]. , 2009, 30(8): 2442 -2446 .
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