›› 2010, Vol. 31 ›› Issue (3): 727-731.

• Fundamental Theroy and Experimental Research • Previous Articles     Next Articles

Test study of influence of crack evolution on strength parameters of expansive soil

LIU Hua-qiang1，YIN Zong-ze2   

  1. 1. Jiangsu Research Institute of Hydraulic Science, Yangzhou 225002, China; 2. Key Laboratory of Ministry of Education for Geomechanics and Embankment Engineering, Hohai University, Nanjing 210098, China
  • Received:2009-03-15 Online:2010-03-10 Published:2010-03-31

PDF (Chinese)

3110

Abstract:

The strength parameters are obtained with consideration of influence of wetting and drying cycles by an experiment based on laboratory direct shear test. The test basically reflects the phenomenon of crack evolution with wetting and drying cycles and reveals that crack evolution results in strength degradation. The results show that both cohesion and internal friction angle will attenuate along with crack evolution. Comparatively, cohesion index will be affected more obviously by crack and its determination should be more cautious. The law of attenuation accords with hyperbola; and the empirical expressions are proposed, which show that the relationship between attenuation of shear strength with increase of wetting and drying times is in fact with crack evolution. The expansive soil in engineering practice includes all kinds of cracks; therefore, in the design, the selection of strength parameters should consider the crack in the expansive soils. As the same time, the test method proposed makes the research of influence of crack evolution on the strength characteristics relatively simple and feasible.

Key words: crack, shear strength, wetting and drying cycles, expansive soil

CLC Number: 

  • TU 41
[1] FAN Ke-wei, LIU Si-hong, LIAO Jie, FANG Bin-xin, WANG Jian-lei, . Experimental study on shearing characteristics of pebbles-filled soilbags [J]. Rock and Soil Mechanics, 2020, 41(2): 477-484.
[2] TU Yuan, WANG Kui-hua, ZHOU Jian, HU An-feng, . Application of effective stress method and effective consolidation stress method for strength calculation in preloading ground [J]. Rock and Soil Mechanics, 2020, 41(2): 645-654.
[3] ZHANG Zhi-tao, WANG Hai-jun, TANG Lei, ZHAO Chu, LI Han-zhang, SU zheng-yang, . Study of fracture characteristics of semi-circular bending with internal crack based on 3D-ILC [J]. Rock and Soil Mechanics, 2020, 41(1): 111-122.
[4] LI Xiao-gang, ZHU Chang-qi, CUI Xiang, ZHANG Po-yu, WANG Rui, . Experimental study of triaxial shear characteristics of carbonate mixed sand [J]. Rock and Soil Mechanics, 2020, 41(1): 123-131.
[5] ZHANG Guo-kai, LI Hai-bo, WANG Ming-yang, LI Xiao-feng, . Crack propagation characteristics in rocks containing single fissure based on acoustic testing and camera technique [J]. Rock and Soil Mechanics, 2019, 40(S1): 63-72.
[6] ZHAO Guo-yan, LI Zhen-yang, WU Hao, WANG En-jie, LIU Lei-lei. Dynamic failure characteristics of sandstone with non-penetrating cracks [J]. Rock and Soil Mechanics, 2019, 40(S1): 73-81.
[7] ZHANG Chen-yang, CHEN Min, HU Ming-jian, WANG Xin-zhi, TANG Jian-jian, . Effect of fine particles content on shear strength of calcareous sand [J]. Rock and Soil Mechanics, 2019, 40(S1): 195-202.
[8] WANG Huan, CHEN Qun, WANG Hong-xin, ZHANG Wen-ju, . Triaxial tests on fly ash with different compaction and matric suction [J]. Rock and Soil Mechanics, 2019, 40(S1): 224-230.
[9] XIE Hui-hui, XU Zhen-hao, LIU Qing-bing, HU Gui-yang, . Evolution of peak strength and residual strength of weak expansive soil under drying-wetting cycle paths [J]. Rock and Soil Mechanics, 2019, 40(S1): 245-252.
[10] LIU Zu-qiang, LUO Hong-ming, ZHENG Min, SHI Yun-jiang, . Study on expansion-shrinkage characteristics and deformation model for expansive soils in canal slope of South-to-North Water Diversion Project [J]. Rock and Soil Mechanics, 2019, 40(S1): 409-414.
[11] ZHOU Meng-jia, WEN Yan-feng, DENG Gang, WANG Yun-jia, SONG Er-xiang, . Three-dimensional discrete element simulation of random breaking strength and size effect in single particle splitting test of rockfill [J]. Rock and Soil Mechanics, 2019, 40(S1): 503-510.
[12] LI Jing-jing, KONG Ling-wei, . Creep properties of expansive soil under unloading stress and its nonlinear constitutive model [J]. Rock and Soil Mechanics, 2019, 40(9): 3465-3475.
[13] 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.
[14] WANG Rui, YAN Shuai, BAI Jian-biao, CHANG Zhi-guo, SONG Yuan-ba, . Theoretical analysis of the destabilization mechanism and the damaged width of rib pillar in open-pit highwall mining [J]. Rock and Soil Mechanics, 2019, 40(8): 3167-3180.
[15] LI Xin-ming, KONG Ling-wei, GUO Ai-guo, . Experimental study of ageing effect on mechanical properties of Nanyang undisturbed expansive soil [J]. Rock and Soil Mechanics, 2019, 40(8): 2947-2955.
Viewed
Full text


Abstract

Cited
  Shared   
  Discussed   
[1] TAO Gan-qiang, YANG Shi-jiao, REN Feng-yu. Experimental research on granular flow characters of caved ore and rock[J]. , 2009, 30(10): 2950 -2954 .
[2] ZHANG Wen-jie，CHEN Yum-min. Pumping tests and leachate drawdown design in a municipal solid waste landfill[J]. , 2010, 31(1): 211 -215 .
[3] NIE Ying, LUAN Mao-tian, TANG Xiao-wei, GUO Ying, ZHANG Zhen-dong. Study of monotonic and coupling cyclic shear characteristics of overconsolidated clay[J]. , 2009, 30(9): 2616 -2622 .
[4] WAN Zhi, DONG Hui, LIU Bao-chen. On choice of hyper-parameters of support vector machines for time series regression and prediction with orthogonal design[J]. , 2010, 31(2): 503 -508 .
[5] SUN Xi-yuan, LUAN Mao-tian, TANG Xiao-wei. Study of horizontal bearing capacity of bucket foundation on saturated soft clay ground[J]. , 2010, 31(2): 667 -672 .
[6] LEI Ming-feng, PENG Li-min, SHI Cheng-hua, AN Yong-lin. Research on construction spatial effects in large-long-deep foundation pit[J]. , 2010, 31(5): 1579 -1584 .
[7] HU Yong-gang, LUO Qiang, ZHANG Liang, HUANG Jing, CHEN Ya-mei. Deformation characteristics analysis of slope soft soil foundation treatment with mixed-in-place pile by centrifugal model tests[J]. , 2010, 31(7): 2207 -2213 .
[8] LU Li, ZHANG Si-ping, ZHANG Yong-xing, HU Dai-wen, WU Shu-guang. Field pull-out test and behavior analysis of compression type rock anchor cables[J]. , 2010, 31(8): 2435 -2440 .
[9] CHAI Bo, YIN Kun-long, XIAO Yong-jun. Characteristics of weak-soft zones of Three Gorges Reservoir shoreline slope in new Badong county[J]. , 2010, 31(8): 2501 -2506 .
[10] WANG Guang-jin，YANG Chun-he ，ZHANG Chao，MA Hong-ling，KONG Xiang-yun ，HO. Research on particle size grading and slope stability analysis of super-high dumping site[J]. , 2011, 32(3): 905 -913 .
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