›› 2015, Vol. 36 ›› Issue (S2): 383-388.doi: 10.16285/j.rsm.2015.S2.053

• Fundamental Theroy and Experimental Research • Previous Articles     Next Articles

In-situ shear tests on base material soil-rock interface in ecological slope protection system

DING Yu1, 2, 3, YANG Qi4, XIA Zhen-yao1, 2, 3, XU Wen-nian1, 2, 3   

  1. 1. Engineering Research Center of Eco-environment in Three Gorges Reservoir Region of Ministry of Education, China Three Gorges University, Yichang, Hubei 443002, China; 2. Collaborative Innovation Center for Geo-hazards and Eco-environment in Three Gorges Area of Hubei Province, China Three Gorges University, Yichang, Hubei 443002, China; 3. Key Laboratory of Geological Hazards on Three Gorges Reservoir Area of Ministry of Education, China Three Gorges University, Yichang, Hubei 443002, China; 4. Guiyang Engineering Corporation Limitied of Power China, Guiyang, Guizhou 550081, China
  • Received:2014-08-31 Online:2015-08-31 Published:2018-06-14

PDF (Chinese)

1426

Abstract: Shear characteristic of base material soil-rock interface plays a key role for long-term stability of ecological slope protection system. Related research on this can provide necessary basis and guidance for resolving the substrate failure and improving the ecological protection technology. The self-made in-situ shear apparatus is used in the field shear tests of 4 groups of base material soil-rock interfaces with different roughnesses. Experimental results show that shear stress-displacement of the base material soil-rock interface is characterized by typical shear softening, including 4 stages of initial linear elastic deformation, elastic plastic deformation, the post-peak softening and residual shear deformation. Under the test conditions, it is found that the peak shear strength increases fast when the arithmetic average deviation of asperity (Ra) is about less than 4 mm. For the higher Ra, the increasing gradient shows a slower trend. Residual shear strength, peak shear displacement and shear displacement stepping to the residual stage show the nearly linear positive correlation with Ra. Therefore, for a specific implementation of ecological slope protection, the reasonable control of slope surface roughness will contribute to increasing the peak and residual shear strength of soil-rock interface, so as to improve the deformation performance and the long-term stability of the protection system.

Key words: base material for ecological slope protection, soil-rock interface, in-situ shear test, shear softening, roughness

CLC Number: 

  • TU 443
[1] XIA Cai-chu, YU Qiang-feng, QIAN Xin, GUI Yang, ZHUANG Xiao-qing. Experimental study of shear-seepage behaviour of rock joints under constant normal stiffness [J]. Rock and Soil Mechanics, 2020, 41(1): 57-66.
[2] WANG Peng-fei, TAN Wen-hui, MA Xue-wen, LI Zi-jian, LIU Jing-jun, WU Yang-fan. Experimental study of seepage characteristics of consecutive and filling fracture with different roughness levels and gap-widths [J]. Rock and Soil Mechanics, 2019, 40(8): 3062-3070.
[3] ZHOU Hui, CHENG Guang-tan, ZHU Yong, ZHANG Chun-sheng, . Anisotropy of shear characteristics of rock joint based on 3D carving technique [J]. Rock and Soil Mechanics, 2019, 40(1): 118-126.
[4] YANG Sheng-qi, LU Jia-wei, TIAN Wen-ling, TANG Jin-zhou,. Experimental study of mechanical behavior of rock specimens with different joint roughness coefficient under conventional triaxial compression [J]. , 2018, 39(S1): 21-32.
[5] LI Zheng-wei, ZHANG Yan-jun, ZHANG Chi, XU Tian-fu，. Experiment on convection heat transfer characteristics in a single granite fracture [J]. , 2018, 39(9): 3261-3269.
[6] XIONG Feng, SUN Hao, JIANG Qing-hui, YE Zu-yang, XUE Dao-rui, LIU Ru-yan，. Theoretical model and experimental verification on non-linear flow at low velocity through rough-walled rock fracture [J]. , 2018, 39(9): 3294-3302.
[7] ZHAO Ting-ting, FENG Yun-tian, WANG Ming, WANG Yong，. Modified Greenwood-Williamson model based stochastic discrete element method for contact with surface roughness [J]. , 2018, 39(9): 3440-3452.
[8] CHEN Chen, LENG Wu-ming, YANG Qi, JIN Zi-hao, NIE Ru-song, QIU Jun,. Experimental study of mechanical properties of concrete pile-slurry-sand interface [J]. , 2018, 39(7): 2461-2472.
[9] WANG Pei-tao, REN Fen-hua, TAN Wen-hui, YAN Zhen-xiong, CAI Mei-feng, YANG Tian-hong.. Model of roughness discrete fractures network for uniaxial compressive test and its mechanical properties [J]. , 2017, 38(S1): 70-78.
[10] ZHANG Wen-quan, YUAN Jiu-dang, WANG Zhong-chang, ZHU Ji-ming，. An experimental study on compressive shear seepage laws of mining-induced fractured rock mass [J]. , 2017, 38(9): 2473-2479.
[11] SONG Lei-bo1, JIANG Quan, LI Yuan-hui, YANG Cheng-xiang, RAN Shu-guang, WANG Bai-lin, LIU Ting,. Description of discontinuities morphology based on shear behavior [J]. , 2017, 38(2): 525-533.
[12] WANG Chang-shuo, WANG Liang-qing, GE Yun-feng, LIANG Ye, SUN Zi-hao, DONG Man-man, ZHANG Nan. A nonlinear method for determining two-dimensional joint roughness coefficient based on statistical parameters [J]. , 2017, 38(2): 565-573.
[13] SUN Ke-ming, XIN Li-wei, ZHAI Cheng, ZHANG Shu-cui, LI Tian-shu. Seepage law of rough fracture during loading-unloading process considering 3D topography characteristics [J]. , 2016, 37(S2): 161-166.
[14] LIU Ri-cheng , JIANG Yu-jing , LI Bo , WANG Xiao-shan , XU Bang-shu , YU Li-yuan,. A study of hydraulic properties of rock fracture networks based on rank-one inverse Broyden quasi-Newton method [J]. , 2016, 37(1): 219-228.
[15] LUO Zhan-you , DU Shi-gui , HUANG Man,. An experimental study of size effect of roughness coefficient on rock joint using push-pull apparatus [J]. , 2015, 36(12): 3381-3386.
Viewed
Full text


Abstract

Cited
  Shared   
  Discussed   
[1] YIN Jie，GAO Yu-feng，HONG Zhen-shun. Research on undrained shear strength tests of soft Lianyungang clay[J]. , 2009, 30(11): 3297 -3301 .
[2] CHEN Shao-jie, GUO Wei-jia, YANG Yong-jie. Experimental study of creep model and failure characteristics of coal[J]. , 2009, 30(9): 2595 -2598 .
[3] ZHAO Lian-heng，LUO Qiang，LI Liang，YANG Feng，DAN Han-cheng. Upper bound quasi-static analysis of dynamic stability of layered rock slopes[J]. , 2010, 31(11): 3627 -3634 .
[4] LIU Xiao-li, ZHANG Dan-dan, LIU Kai, SU Yuan-yuan. Design and application of a kind of direct shear model test apparatus[J]. , 2010, 31(S2): 475 -480 .
[5] KANG Yong-jun，YANG Jun，SONG Er-xiang. Calculation method and parameter research for time-history of factor of safety of slopes subjected to seismic load[J]. , 2011, 32(1): 261 -268 .
[6] LU Kun-lin, YANG Yang. Approximate calculation method of active earth pressure considering displacement[J]. , 2009, 30(2): 553 -557 .
[7] LI Rong-jian，YU Yu-zhen，Lü He，LI Guang-xin. Dynamic centrifuge modeling of piles-reinforced slope on saturated sandy foundation[J]. , 2009, 30(4): 897 -902 .
[8] XIAO Cheng-zhi, SUN Jian-cheng, LI Yu-run, LIU Xiao-peng. Mechanism analysis of ecological slope protection against runoff erosion by grass jetting on 3D geomat[J]. , 2011, 32(2): 453 -458 .
[9] ZHOU Wan-huan , YIN Jian-hua. Finite element modeling soil nail pullout behavior and effects of overburden pressure and dilation[J]. , 2011, 32(S1): 691 -0696 .
[10] QIAN Jian-gu , HUANG Mao-song. Micro-macro mechanismic analysis of plastic anisotropy in soil[J]. , 2011, 32(S2): 88 -93 .
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