›› 2005, Vol. 26 ›› Issue (11): 1785-1789.

• Fundamental Theroy and Experimental Research • Previous Articles     Next Articles

Discussion of linear regression method to estimate shear strength parameters from results of triaxial tests

CHEN Li-hong1, CHEN Zu-yu2, LI Guang-xin3   

  1. 1. School of Civil Engineering and Architecture, Beijing Jiatong University, Beijing 100044, China; 2. China Institute of Water Resources and Hydropower Research, Beijing 100044, China; 3. Department of Hydraulic and Hydropower Engineering, Tsinghua University, Beijing 100084, China
  • Received:2004-04-09 Online:2005-11-10 Published:2014-01-03

PDF (PC)

2212

Abstract: Shear strength parameters are most important factors to evaluate the stability and economical efficiency of a geotechnical project. One of the most effective and mainly used ways to estimate the shear strength parameters is linear regression method. The shear strength parameters can be calculated either by regressing maximum shear stress with average normal stress or regressing maximum principal stress with minor principal stress. The equations to apply these two methods are introduced, These methods and moment method are applied to calculate the shear strength parameters of core clay in Xiaolangdi Dam with 320 triaxial tests and clay of several other embankments; and the results show that the cohesive strength is underestimated and friction strength is overestimated by regressing maximum shear stress with average normal stress will the standard deviation and relation coefficient decreased when the sample size increased. The theoretical analysis also reveals this trend. The theoretical analysis based on probability also reveals that trend. So the method regressing maximum principal stress with minor principal stress not regressing maximum shear stress with average normal stress should be chosen when estimating shear strength parameters from conventional triaxial tests.

Key words: soil shear strength, linear regression, triaxial shear test

CLC Number: 

  • TU 411.7
  • Please send e-mail to pingzhou3@126.com if you would like to read full paper in English for free. Parts of our published papers have English translations.
[1] LI Chang-jun, CHEN Wei-zhong, YANG Jian-ping, LIU Jin-quan, . Variation of segment joint opening of underwater shield tunnel in operation period [J]. , 2018, 39(10): 3783-3793.
[2] TIAN Mao-lin, XIAO Hong-tian, YAN Qiang-gang,. Displacement back analysis of rock parameters of Hoek-Brown criterion using nonlinear regression method [J]. , 2017, 38(S1): 343-350.
[3] ZHANG She-rong, HU An-kui, WANG Chao, PENG Zhen-hui, . Three-dimensional intelligent inversion method for in-situ stress field based on SLR-ANN algorithm [J]. , 2017, 38(9): 2737-2745.
[4] YANG Gui, XU Jian-bao, SUN Xin, TANG Chen-jing, . Experimental study of influence of particle shape on strength and deformation for artificial rockfill materials [J]. , 2017, 38(11): 3113-3118.
[5] XU Guo-sheng，LI De-hai，HOU De-feng，ZHANG Yan-bin. Measurement and prediction of the transientsurface movement and deformation induced by mining under thick alluvium [J]. , 2016, 37(7): 2056-2062.
[6] HOU Xiao-kun ，LI Tong-lu ，LI Ping , . Analysis of stress path and deformation-failure mechanism of high cutting loess slope [J]. , 2014, 35(S2): 548-555.
[7] FANG Ying-guang,. Theoretical and experimental investigation on size effect characteristic of strength and deformation of soil [J]. , 2014, 35(1): 41-47.
[8] JIANG Hong-xiang, DU Chang-long, LIU Song-yong, LIU Zeng-hui. Numerical analysis of rock cutting based on fracture mechanics [J]. , 2013, 34(4): 1179-1184.
[9] WANG Xiao-jun , FENG Xiao , ZHAO Kui , SHAO Hai , YE Zi-huan，. Study of critical thickness of roof of level pillar stoping under multifactor influence [J]. , 2013, 34(12): 3505-3512.
[10] YU Dong-ming , YAO Hai-lin , WU Shao-feng . Difference and modification of regression analysis methods to estimate shear strength parameters obtained by triaxial test [J]. , 2012, 33(10): 3037-3042.
[11] FENG Rui-ling ，WANG Peng-cheng ，WU Li-jian. Discussion on calculation method of salt dilating and frost-heave deformation occurred in sulphate saline soil subgrade [J]. , 2012, 33(1): 238-242.
[12] WEI Hou-zhen, YAN Rong-tao, CHEN Pan, TIAN Hui-hui, WU Er-lin, WEI Chang-fu. Deformation and failure behavior of carbon dioxide hydrate-bearing sands with different hydrate contents under triaxial shear tests [J]. , 2011, 32(S2): 198-203.
[13] SUN De-an，CHEN Bo. Mechanical behavior of remolded overconsolidated Shanghai soft clay and its elastoplastic simulation [J]. , 2010, 31(6): 1739-1743.
[14] FENG Rui-ling, TAO Jian-li, ZHAO Zhan-chang, SHEN Yu-peng. Research on compaction property of fine soil containing coarse granulae [J]. , 2010, 31(2): 382-386.
[15] XU Jin-ming, QIANG Pei, ZHANG Peng-fei. Texture analysis of photographs of silty clay [J]. , 2009, 30(10): 2903-2907.
Viewed
Full text


Abstract

Cited
  Shared   
  Discussed   
[1] CHENG Tao, YAN Ke-qin. Numerical simulation for influences of stress paths on earth's surface deformation[J]. , 2010, 31(2): 661 -666 .
[2] MI Hai-zhen, GAO Chun. Experimental study of expansive behaviors of quicklime[J]. , 2010, 31(4): 1253 -1256 .
[3] HE Xian-long, ZHAO Li-zhen. Analysis of shear wave velocity based on multiple cross-correlation functions[J]. , 2010, 31(8): 2541 -2545 .
[4] SUN Xi-ping, ZHANG Bao-hua, ZHANG Qiang, WANG Xiao-nan. Stability analysis of gravity quay when rubble bedding was eroded by water flow[J]. , 2010, 31(10): 3184 -3190 .
[5] CHEN Jing-yu , GONG Xiao-nan, DENG Ya-hong. Research on dissipation of excess pore water pressure in one-dimensional finite strain consolidation of soft clays[J]. , 2009, 30(1): 191 -195 .
[6] PAN Yue, ZHANG Yong, WANG Zhi-qiang. Catastrophe theoretical analysis of disintegrated outburst of a single coal shell in coal-gas outburst[J]. , 2009, 30(3): 595 -602 .
[7] ZHANG Chun-hui, ZHAO Quan-sheng. Early warning system of mining subsidence damage based on ARCGIS[J]. , 2009, 30(7): 2197 -2202 .
[8] SUN Jian , WANG Lian-guo , TANG Fu-rong , SHEN Yi-feng , GONG Shi-long. Microseismic monitoring failure characteristics of inclined coal seam floor[J]. , 2011, 32(5): 1589 -1595 .
[9] YANG Yong-xiang , ZHOU Jian , JIA Min-cai , HU Jin-hu. Visualization testing on liquefaction properties of saturated sands[J]. , 2011, 32(6): 1643 -1648 .
[10] XU Zheng-ming, XUE Qiang, ZHAO Ying. Research on time effect of modified sludge composites by triaxial tests on mechanical properties[J]. , 2011, 32(6): 1713 -1718 .
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