|Table of Contents|

Stability Analysis of Treatment of High-steep Slope Landslide Based on Strength Reduction Method(PDF)

《建筑科学与工程学报》[ISSN:1673-2049/CN:61-1442/TU]

Issue:
2020年01期
Page:
120-126
Research Field:
Publishing date:

Info

Title:
Stability Analysis of Treatment of High-steep Slope Landslide Based on Strength Reduction Method
Author(s):
LI Shu-lin1;  ZHAO Rui-ming1;  PENG Fu-hua2;  CHEN Dong-xia1
(1. School of Architecture and Civil Engineering, Xiamen University, Xiamen 361005, Fujian, China; 2. Changsha Institute of Mining Research, Changsha 410012, Hunan, China)
Keywords:
open-pit;  high-steep slope;  stability analysis;  landslide treat;  strength reduction method;  numerical simulation
PACS:
TU413
DOI:
10.19815/j.jace.2018.07090
Abstract:
The stability of the high-steep slope landslide under the observation platform of Sandaozhuang open-pit was analyzed, and the effect of the landslide treatment project was demonstrated. On the basis of field exploration and laboratory test, the strength parameters of rock and soil were obtained, and the original finite element model of slope was established. Then based on the strength reduction method, the supporting measures such as prestressed anchor cable, anchor bolt, anti-slide pile, retaining wall and grouting were added to establish the finite element model of the slope after treatment, and the numerical simulation results were obtained. The results of slope safety factor, plastic strain, displacement and internal force of components before and after landside treatment were compared and analyzed. The results show that the safety factor of the original slope is 1.175, and the strain is mainly concentrated at the junction of the gravel outside the slope, the loose accumulation of block stone and the moderately weathered schist inside, and the slip zone is shallow. The slope is easy to be damaged locally, with poor integrity and stability. After treatment and reinforcement, the prestressed anchor cable, anti-slide pile and other supporting structures give full play to the reinforcement effect, and effectively fix the external loose accumulation body and the internal moderately weathered schist together. The slope integrity is improved, the safety factor is increased to 1.452, the overall position of the slope slip zone is from shallow to deep, mainly located in the moderately weathered schist, and the failure type is changed into the overall failure that is not easy to occur. The high-steep slope under the slope of Sandaozhuang open-pit has achieved good results, and the slope stability has been significantly improved.

References:

[1] 焦玉书.金属矿山露天开采[M].北京:冶金工业出版社,1989.
JIAO Yu-shu.Open Pit Mining of Metal Mine[M].Beijing:Metallurgical Industry Press,1989.
[2]何 芳,徐友宁,乔 冈,等.中国矿山地质灾害分布特征[J].地质通报,2012,31(2/3):476-485.
HE Fang,XU You-ning,QIAO Gang,et al.Distribution Characteristics of Mine Geological Hazards in China[J].Geological Bulletin of China,2012,31(2/3):476-485.
[3]杨天鸿,解联库,王善勇,等.抚顺西露天矿北帮边坡治理工程效果初步评价[J].岩石力学与工程学报,2005,24(11):1841-1846.
YANG Tian-hong,XIE Lian-ku,WANG Shan-yong,et al.Effect Evaluation of Distortion for North Project of Side Slope in Fushun West Open Cast[J].Chinese Journal of Rock Mechanics and Engineering,2005,24(11):1841-1846.
[4]ZIENKIEWICZ O C,HUMPHESON C,LEWIS R W.Associated and Non-associated Visco-plasticity and Plasticity in Soil Mechanics[J].Geotechnique,1975,25(4):671-689.
[5]MATSUI T,SAN K C.Finite Element Slope Stability Analysis by Shear Strength Reduction Technique[J].Soils and Foundations,1992,32(1):59-70.
[6]GRIFFITHS D V,LANE P A.Slope Stability Analysis by Finite Elements[J].Geotechnique,1999,49(3):387-403.
[7]DAWSON E M,ROTH W H,DRESCHER A.Slope Stability Analysis by Strength Reduction[J].Geotechnique,1999,49(6):835-840.
[8]赵尚毅,郑颖人,时卫民,等.用有限元强度折减法求边坡稳定安全系数[J].岩土工程学报,2002,24(3):343-346.
ZHAO Shang-yi,ZHENG Ying-ren,SHI Wei-min,et al.Analysis on Safety Factor of Slope by Strength Reduction FEM[J].Chinese Journal of Geotechnical Engineering,2002,24(3):343-346.
[9]郑颖人,赵尚毅.有限元强度折减法在土坡与岩坡中的应用[J].岩石力学与工程学报,2004,23(19):3381-3388.
ZHENG Ying-ren,ZHAO Shang-yi.Application of Strength Reduction FEM in Soil and Rock Slope[J].Chinese Journal of Rock Mechanics and Engineering,2004,23(19):3381-3388.
[10]郑颖人,赵尚毅.边(滑)坡工程设计中安全系数的讨论[J].岩石力学与工程学报,2006,25(9):1937-1940.
ZHENG Ying-ren,ZHAO Shang-yi.Discussion on Safety Factors of Slope and Landslide Engineering Design[J].Chinese Journal of Rock Mechanics and Engineering,2006,25(9):1937-1940.
[11]郑颖人.岩土材料屈服与破坏及边(滑)坡稳定分析方法研讨——“三峡库区地质灾害专题研讨会”交流讨论综述[J].岩石力学与工程学报,2007,26(4):649-661.
ZHENG Ying-ren.Discussion on Yield and Failure of Geomaterials and Stability Analysis Methods of Slope/Landslide — Communion and Discussion Summary of Special Topic Forum on Geologic Disasters in the Three Gorges Project Region[J].Chinese Journal of Rock Mechanics and Engineering,2007,26(4):649-661.
[12]唐 芬,郑颖人.强度储备安全系数不同定义对稳定系数的影响[J].土木建筑与环境工程,2009,31(3):61-65,97.
TANG Fen,ZHENG Ying-ren.Effect on Safety Factors in Different Definitions Based on Strength Margin[J].Journal of Civil,Architectural & Environmental Engineering,2009,31(3):61-65,97.
[13]唐 芬,郑颖人.边坡稳定安全储备的双折减系数推导[J].重庆交通大学学报:自然科学版,2007,26(4):95-100.
TANG Fen,ZHENG Ying-ren.Analysis on Safety Reserve of Slope with Two Strength Reduction Factor[J].Journal of Chongqing Jiaotong University:Natural Science,2007,26(4):95-100.
[14]BAI B,YUAN W,LI X C.A New Double Reduction Method for Slope Stability Analysis[J].Journal of Central South University,2014,21(3):1158-1164.
[15]杨光华,张玉成,张有祥.变模量弹塑性强度折减法及其在边坡稳定分析中的应用[J].岩石力学与工程学报,2009,28(7):1506-1512.
YANG Guang-hua,ZHANG Yu-cheng,ZHANG You-xiang.Variable Modulus Elastoplastic Strength Reduction Method and Its Application to Slope Stability Analysis[J].Chinese Journal of Rock Mechanics and Engineering,2009,28(7):1506-1512.
[16]李小春,袁 维,白 冰,等.基于局部强度折减法的边坡多滑面分析方法及应用研究[J].岩土力学,2014,35(3):847-854.
LI Xiao-chun,YUAN Wei,BAI Bing,et al.Analytic Approach of Slope Multi-slip Surfaces Based on Local Strength Reduction Method and Its Application[J].Rock and Soil Mechanics,2014,35(3):847-854.
[17]陈国庆,黄润秋,周 辉,等.边坡渐进破坏的动态强度折减法研究[J].岩土力学,2013,34(4):1140-1146.
CHEN Guo-qing,HUANG Run-qiu,ZHOU Hui,et al.Research on Progressive Failure for Slope Using Dynamic Strength Reduction Method[J].Rock and Soil Mechanics,2013,34(4):1140-1146.

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Last Update: 2020-01-13