Rock and Soil Mechanics ›› 2022, Vol. 43 ›› Issue (10): 2923-2932.doi: 10.16285/j.rsm.2021.2093

• Numerical Analysis • Previous Articles    

Upper limit analysis for ultimate bearing capacity of heterogeneous stratified slope

QU Chun-lai1, 2, FU Di1, LIU Shi-wei1, 2, 3, LENG Xian-lun3, LI Jian-he4, SUN He-yuan1   

  1. 1. College of Water Conservancy and Hydropower, Hebei University of Engineering, Handan, Hebei 056038, China; 2. Hebei Key Laboratory of Intelligent Water Conservancy, Hebei University of Engineering, Handan, Hebei 056038, China; 3. State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan, Hubei 430071, China; 4. Changjiang Survey Planning Design and Research Co., Ltd., Wuhan, Hubei 430010, China
  • Received:2021-12-10 Revised:2022-07-02 Online:2022-10-19 Published:2022-10-18
  • Supported by:
    This work was supported by the Special Fundamental Research Project of Hebei Natural Science Foundation (E2020402087), the Open Subject of State Key Laboratory of Geotechnical Mechanics and Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences (Z018022) and the Science and Technology Project of Hebei Education Department (BJ2019023, QN2021030).

PDF (Chinese)

294

Abstract: Ultimate bearing capacity has always been a difficult and hot issue in mining and rock and soil fields, which seriously affects the safety and stability of slope and adjacent slope structures. Based on the upper bound theorem of limit analysis, the failure mechanism of heterogeneous layered slope with rigid multi-sliders was established in three modes. The upper bound solution of slope ultimate bearing capacity was deduced, and the optimal value was obtained by sequential quadratic programming algorithm (SQP). The north slope of Sancha mine was taken as the engineering background to verify effectiveness of the proposed method by comparing with the numerical method, and then the influence analysis of two parameters of different slope angles and the distances between dump and slope shoulder was carried out. The results were concluded as follows. (1) The results of the proposed method are in good agreement with those of numerical method, indicating that the proposed upper limit solution of slope ultimate bearing capacity is reasonable and effective. (2) The ultimate bearing capacity of slope has a linear negative correlation with slope angle and a linear positive correlation with the distance between the dump and the slope shoulder. Compared with the distance between the dump and the slope shoulder, the slope angle is more sensitive to the bearing capacity of slope. (3) The change of slope angle has a great influence on the slope failure mode, but the change of the distance between the dump and the slope shoulder has no obvious influence on the slope failure mode. (4) Both slope angle and the distance between the dump and the slope shoulder have an impact on the initial position and the overflow position of the slip surface. The initial position of the slip surface is greatly affected by the distance between the dump and the slope shoulder, but less affected by the slope angle. The overflow position of slip surface is greatly affected by slope angle but less affected by the distance between dump and slope shoulder. Relevant research results are expected to provide theoretical support for slope and adjacent slope foundation design.

Key words: slope engineering, ultimate bearing capacity, upper limit analysis, heterogeneous slope, rigid multi-sliders, slope stability

CLC Number: 

  • TU 457
[1] ZHONG Zi-lan, HAN Chun-tang, LI Jin-qiang, ZHAO Xin, MIAO Hui-quan. Ultimate bearing capacity of sand under lateral horizontal movement of shallowly buried pipelines [J]. Rock and Soil Mechanics, 2022, 43(S2): 95-103.
[2] ZHANG Wen-lian, SUN Xiao-yun, CHEN Yong, JIN Shen-yi, . Slope stability analysis method based on compressive strength reduction of rock mass [J]. Rock and Soil Mechanics, 2022, 43(S2): 607-615.
[3] SADEGHI Hamed, KOLAHDOOZ Ali, AHMADI Mohammad-Mehdi. Slope stability of an unsaturated embankment with and without natural pore water salinity subjected to rainfall infiltration [J]. Rock and Soil Mechanics, 2022, 43(8): 2136-2148.
[4] WANG Jia-yu, LIU Run, JI Yong-hong, YANG Xu, CHEN Guang-si, WANG Xiao-lei, . Upper bound limit analysis of horizontal and moment ultimate bearing capacities of bucket foundation [J]. Rock and Soil Mechanics, 2022, 43(3): 777-788.
[5] CHEN Dong, LI Hong-jun, ZHU Kai-bin. Vector sum analysis method for slope stability based on new main sliding trend direction [J]. Rock and Soil Mechanics, 2021, 42(8): 2207-2214.
[6] LIU Hui, ZHENG Jun-jie, ZHANG Rong-jun. System failure probability analysis of cohesive slope considering the spatial variability of undrained shear strength [J]. Rock and Soil Mechanics, 2021, 42(6): 1529-1539.
[7] YAN Qing, ZHAO Jun-hai, ZHANG Chang-guang. A new solution to the ultimate bearing capacity of reinforced foundation near slope based on the unified strength theory [J]. Rock and Soil Mechanics, 2021, 42(6): 1587-1600.
[8] YANG Jian, JIAN Wen-bin, HUANG Wei, HUANG Cong-hui, LUO Jin-mei, LI Xian-zhong, . Pull-out test and ultimate bearing capacity calculation of grouting branch-type anchor [J]. Rock and Soil Mechanics, 2021, 42(4): 1126-1132.
[9] ZHENG Hong, ZHANG Tan, WANG Qiu-sheng. One package of schemes for some difficult issues in finite element plasticity analysis [J]. Rock and Soil Mechanics, 2021, 42(2): 301-314.
[10] LI Zhen-yu, OUYANG Miao, XIAO Hong-bin, WANG Ju-shan, LI Tao, LIU Si-si, . Improvement of slope soil consolidation capacity of plant root system based on regulation of root architecture [J]. Rock and Soil Mechanics, 2021, 42(12): 3271-3280.
[11] FENG Heng, GAO Fei-lüe, LIU Guan-shi, GAO Bin, XIAO Fei, ZENG Er-xian, . Full-scale tests of steel grillage foundation in aeolian sand areas [J]. Rock and Soil Mechanics, 2021, 42(12): 3328-3334.
[12] LIN Zhi, HU Wei, ZHAO Pu, CHEN Qiu-nan, HE Jian-qing, CHEN Jie, SHI Dan-da, . Model test study on inclined pull-out bearing characteristics of flat circular anchor in sand [J]. Rock and Soil Mechanics, 2021, 42(11): 3059-3068.
[13] LI Chao, LI Tao, JING Guo-ye, XIAO Yu-hua, . Study on the ultimate bearing capacity of surrounding soil underlying gripper of shaft boring machine [J]. Rock and Soil Mechanics, 2020, 41(S1): 227-236.
[14] HU Wei, MENG Jian-wei, YAO Chen, LEI Yong, . A method for calculating vertical pullout ultimate bearing capacity of shallow circular anchor plate [J]. Rock and Soil Mechanics, 2020, 41(9): 3049-3055.
[15] PAN Yong-liang, JIAN Wen-xing, LI Lin-jun, LIN Yu-qiu, TIAN Peng-fei. A study on the rainfall infiltration of granite residual soil slope with an improved Green-Ampt model [J]. Rock and Soil Mechanics, 2020, 41(8): 2685-2692.
Viewed
Full text


Abstract

Cited
  Shared   
  Discussed   
[1] YAO Yang-ping, HOU Wei. Basic mechanical behavior of soils and their elastoplastic modeling[J]. , 2009, 30(10): 2881 -2902 .
[2] XU Jin-ming, QIANG Pei, ZHANG Peng-fei. Texture analysis of photographs of silty clay[J]. , 2009, 30(10): 2903 -2907 .
[3] XIANG Tian-bing, FENG Xia-ting, CHEN Bing-rui, JIANG Quan, ZHANG Chuan-qing. Rock failure mechanism and true triaxial experimental study of specimens with single structural plane under three-dimensional stress[J]. , 2009, 30(10): 2908 -2916 .
[4] SHI Yu-ling, MEN Yu-ming, PENG Jian-bing, HUANG Qiang-bing, LIU Hong-jia. Damage test study of different types structures of bridge decks by ground-fissure[J]. , 2009, 30(10): 2917 -2922 .
[5] XIA Dong-zhou, HE Yi-bin, LIU Jian-hua. Study of damping property and seismic action effect for soil-structure dynamic interaction system[J]. , 2009, 30(10): 2923 -2928 .
[6] XU Su-chao, FENG Xia-ting, CHEN Bing-rui. Experimental study of skarn under uniaxial cyclic loading and unloading test and acoustic emission characteristics[J]. , 2009, 30(10): 2929 -2934 .
[7] ZHANG Li-ting, QI Qing-lan, WEI Jing HUO Qian, ZHOU Guo-bin. Variation of void ratio in course of consolidation of warping clay[J]. , 2009, 30(10): 2935 -2939 .
[8] ZHANG Qi-yi. Study of failure patterns of foundation under combined loading[J]. , 2009, 30(10): 2940 -2944 .
[9] YI Jun, JIANG Yong-dong, XUAN Xue-fu, LUO Yun, ZHANG Yu. A liquid-solid dynamic coupling modelof ultrasound enhanced coalbed gas desorption and flow[J]. , 2009, 30(10): 2945 -2949 .
[10] 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 .
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