›› 2013, Vol. 34 ›› Issue (10): 2877-2888.

• Geotechnical Engineering • Previous Articles     Next Articles

Research on soil particle joint function and brittle-elastoplastic cement damage model of unsaturated granite residual soil

TANG Lian-sheng1, 5, SANG Hai-tao2, 5, SONG Jing1, LIU Feng-tao1, YAN Bo3, ZHANG Peng-cheng4   

  1. 1. Department of Earth Sciences, Sun Yat-Sen University, Guangzhou 510275, China; 2. School of Engineering, Sun Yat-Sen University, Guangzhou 510275, China; 3. Architecture Science Academy of Guangdong Province, Guangzhou 510550, China; 4. Guangzhou Urban Planning Survey and Design Institute, Guangzhou 510060, China; 5. Guangdong Provincial Key Laboratory of Geological Processes and Mineral Resources, Guangzhou 510275, China
  • Received:2013-04-17 Online:2013-10-09 Published:2013-10-18

Abstract: Unsaturated granite residual soil is mainly ferruginous cement, its strength decreases sharply in water, structural significant, showing brittle-elastoplastic damage characteristics, whose soil particle joint function is the core problem of structure and brittle- elastoplastic damage. The unsaturated soil particle joint function is discussed; it is divided into contact and non-contact joints, and these two kinds of joints are expressed as suction effects in soil particle intergranular interactions, that is the suction between grains composed of variable structure suction and wet suction. For unsaturated granite residual soil, particle joint function should be paid more attention. Unsaturated granite residual soil’s contact joint is dominated by ferruginous cementation and all levels of granularity composition mixtures as sand, clay and so on; they cause the suction between grains changing greatly in water or disturbance, resulting in the properties of the brittleness in the mechanics of unsaturated granite residual soil. Then through theoretical derivation, by referencing coordination number, the Smith formula, and the Fisher formula in mineralogy, crystal powder mechanics and engineering, quantitative calculation formula of variable structure suction and the soil accumulation mode, dry density, void ratio, water / saturation are given; and the rationality of the calculation formula is verified by tests. Then we research and realize that free iron oxide cement is the fundamental point of granite residual soil’s property of brittle-elastoplasticity, so a masonry model is used; and then void ratio and structure parameter are applied to construct the brittle damage process function; a theory model which can reflect the damage of unsaturated granite residual soil elastoplasticity is established. Through the comparison of calculation and experiment results. The results show that the model established above can well reflect the unique stress-strain relationship of unsaturated granite residual soil. It can explain well the mechanism of unsaturated granite residual soil which is easily destroyed in water or disturbance according to theory.

Key words: unsaturation, granite residual soil, soil particle joint function, brittle elastoplasticity, damage

CLC Number: 

  • TU 45
[1] CHEN Wei-zhong, LI Fan-fan, LEI Jiang, YU Hong-dan, MA Yong-shang, . Study on creep characteristics of claystone under thermo-hydro-mechanical coupling [J]. Rock and Soil Mechanics, 2020, 41(2): 379-388.
[2] ZHANG Feng-rui, JIANG An-nan, YANG Xiu-rong, SHEN Fa-yi. Experimental and model research on shear creep of granite under freeze-thaw cycles [J]. Rock and Soil Mechanics, 2020, 41(2): 509-519.
[3] LIANG Ke, CHEN Guo-xing, LIU Kang, WANG Yan-zhen, . Degradation properties and prediction model of maximum shear modulus of saturated coral sand under cyclic triaxial loading [J]. Rock and Soil Mechanics, 2020, 41(2): 601-611.
[4] LI Fan-fan, CHEN Wei-zhong, LEI Jiang, YU Hong-dan, MA Yong-shang, . Study of mechanical properties of claystone based on plastic damage [J]. Rock and Soil Mechanics, 2020, 41(1): 132-140.
[5] 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.
[6] FAN Yun-hui, ZHU Qi-zhi, NI Tao, ZHANG Kun, ZHANG Zhen-nan, . A brittle-ductile transition constitutive model based on discrete elastic tensors [J]. Rock and Soil Mechanics, 2019, 40(S1): 181-188.
[7] LI Jie-lin, ZHU Long-yin, ZHOU Ke-ping, LIU Han-wen, CAO Shan-peng, . Damage characteristics of sandstone pore structure under freeze-thaw cycles [J]. Rock and Soil Mechanics, 2019, 40(9): 3524-3532.
[8] ZHANG Chao, YANG Qi-jun, CAO Wen-gui, . Study of damage constitutive model of brittle rock considering post-peak stress dropping rate [J]. Rock and Soil Mechanics, 2019, 40(8): 3099-3106.
[9] 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.
[10] SUN Feng, XUE Shi-feng, PANG Ming-yu, TANG Mei-rong, ZHANG Xiang, LI Chuan, . 3D simulation of fracture growth from perforation to near-wellbore in horizontal wells based on continuum damage model [J]. Rock and Soil Mechanics, 2019, 40(8): 3255-3261.
[11] CAI Yu, XU Lin-rong, ZHOU De-quan, DENG Chao, FENG Chen-xi, . Model test research on method of self-balance and traditional static load [J]. Rock and Soil Mechanics, 2019, 40(8): 3011-3018.
[12] LIU Xin-rong, DENG Zhi-yun, LIU Yong-quan, LIU SHU-lin, LU Yu-ming, . Study of cumulative damage and failure mode of horizontal layered rock slope subjected to seismic loads [J]. Rock and Soil Mechanics, 2019, 40(7): 2507-2516.
[13] MA De-peng, ZHOU Yan, LIU Chuan-xiao, SHANG Yan-dong, . Energy evolution characteristics of coal failure in triaxial tests under different unloading confining pressure rates [J]. Rock and Soil Mechanics, 2019, 40(7): 2645-2652.
[14] MA Qiu-feng, QIN Yue-ping, ZHOU Tian-bai, YANG Xiao-bin. Mechanical properties and constitutive model of porous rock under loading and unloading [J]. Rock and Soil Mechanics, 2019, 40(7): 2673-2685.
[15] WANG Jie, SONG Wei-dong, TAN Yu-ye, FU Jian-xin, CAO Shuai, . Damage constitutive model and strength criterion of horizontal stratified cemented backfill [J]. Rock and Soil Mechanics, 2019, 40(5): 1731-1739.
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] LIN Gang,XU Chang-jie,CAI Yuan-qiang. Research on characters of retaining structures for deep foundation pit excavation under unbalanced heaped load[J]. , 2010, 31(8): 2592 -2598 .
[4] MU Yan-hu,MA Wei,SUN Zhi-zhong,LIU Yong-zhi. Comparative analysis of cooling effect of crushed rock embankment along the Qinghai-Tibet Railway[J]. , 2010, 31(S1): 284 -292 .
[5] 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 .
[6] 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 .
[7] LU Kun-lin, YANG Yang. Approximate calculation method of active earth pressure considering displacement[J]. , 2009, 30(2): 553 -557 .
[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] SU Li-jun, LIAO Hong-jian, YIN Jian-hua. Investigation on stress variation in soil surrounding a soil nail during installation and pull-out[J]. , 2011, 32(S1): 124 -128 .
[10] ZHANG Ya-min, MA Feng-shan, XU Jia-mo, ZHAO Hai-jun. Deformation laws of rock mass due to transform from open-pit to underground mining in high stress area[J]. , 2011, 32(S1): 590 -0595 .