Stability Study of Multi-Step Slope Based on Strength Reduction Method

doi:10.3969/j.issn.1674-0696.2014.06.21

Abstract

Abstract: The step number, ratio and platform width which influenced the stability of multi-step slope were analyzed by using the strength reduction finite element method. The effect laws of each factor on slope stability were concluded; and the maximum shear strain region of slopes was analyzed when the critical slope was unstable. The results show the essential impact of each factor on slopes stability was changing the shear zone of slopes to change the sliding resistance force.

Key words: geotechnical engineering, multi-step slope, strength reduction method, number of steps, ratio of slope, platform width

摘要： 采用有限元强度折减法研究了多级边坡的级数、坡率、平台宽度等因子对边坡稳定性的影响，总结了各因子对边坡稳定性影响的规律，分析了边坡临界失稳时最大剪应变区。研究表明：各因子对多级边坡稳定性的影响实质是改变边坡临界失稳时受剪区域而影响边坡的抗滑力。

关键词: 岩土工程, 多级边坡, 强度折减法, 级数, 坡率, 平台宽度

CLC Number:

U453.5

Chen Yinchun, Hu Wenliang. Stability Study of Multi-Step Slope Based on Strength Reduction Method[J]. Journal of Chongqing Jiaotong University(Natural Science), 2014, 33(6): 100-103.

陈寅春，胡文亮. 基于有限元强度折减法多级边坡稳定性研究[J]. 重庆交通大学学报（自然科学版）, 2014, 33(6): 100-103.

References

［1］赵尚毅,郑颖人,石卫民,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 Shangyi,Zhen Yingren,Shi Weimin,et al.Analysis on safety factor of slope by strength reduction FEM［J］.Chinese Journal of Geotechnical Engineering,2002,24(3):343-346.
［2］韩爱民,李建国,傅国利,等.基于有限差分强度折减法的多级边坡破坏模式研究［J］.工程地质学报,2007,15(6):784-788.
Han Ai’min,Li Jianguo,Fu Guoli,et al.Numerical analysis of failure modes in slopes with multi-steps using shear strengthen reduction FDM［J］.Journal of Engineering Geology,2007,15 (6):784-788.
［3］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 Yingren,Zhao Shangyi.Application of strength reduction FEM in soil androck slope［J］.Journal of Rock Mechanics and Engineering,2004,23(19):3381-3388.
［4］刘文治,康小宏,王瑞,等.高填土边坡多级挡土墙土压力观测试验研究［J］.云南农业大学学报,2010,25(3):424-431.
Liu Wenzhi,Kang Xiaohong,Wang Rui,et al.Observation experiment research on earth pressure of high filled soil slope multi-level retaining wall［J］.Journal of Yunnan Agricultural University,2010,25(3):424-431.
［5］周应华,周德培.均质边坡分级开挖宽平台设计初探［J］.山地学报,2007,25(3):381-384.
Zhou Yinghua,Zhou Depei.Preliminary design of excavation platform for homogeneous slope［J］.Journal of Mountain Science,2007,25(3):381-384.
［6］徐干成.地下工程支护结构［M］.北京:中国水利水电出版社,2001:3-5.
Xu Gancheng.The Underground Engineering Support Structure［M］.Beijing:China Water Conservancy and Hydropower Press,2001:3-5.
［7］魏海波,吴敏.边坡的有限元分析及ANSYS软件对边坡开挖的模拟［J］.东北水利水电,2004,20(4) :42-44.
Wei Haibo,Wu Min.Finite element analysis of side slope and side slope excavation simulated by ANSYS software［J］.Water Resources & Hydropower of Northeast China,2004,20(4):42-44..
［8］连镇营,韩国城,孔宪京.强度折减有限元法研究开挖边坡的稳定性［J］.岩土工程学报,2001,23(4):407-409.
Lian Zhenying,Han Guocheng,Kong Xianjing.Stability analysis of excavation by strength reduction FEM［J］.Chinese Journal of Geotechnical Engineering,2001,23 (4):407-409.
［9］郑颖人,肖强,叶海林,等.地震隧洞稳定性分析探讨［J］.岩石力学与工程学报,2010,29(6):1081-1088.
Zhen Yingren,Xiao Qiang,Ye Hailin,et al.Study of tunnel stability analysis with seismic load［J］.Journal of Rock Mechanics and Engineering,2010,29(6):1081-1088.

[1]	WANG Zongjian1,2, LI Chang1, XIAO Liang2, LU Liang2. Triaxial Test Study on Reinforcement Effect of Reinforced Cohesive Soil [J]. Journal of Chongqing Jiaotong University(Natural Science), 2021, 40(07): 99-106.
[2]	YE Xianfeng, HAN Yijiang, ZHU Chijie, CHENG Yong. Risk Assessment of Anchorage Slope Instability Based on Improved Variable Weight-TOPISIS [J]. Journal of Chongqing Jiaotong University(Natural Science), 2021, 40(02): 108-115.
[3]	ZHANG Xiao, YIN Zhanchao, LIU Xiao, DUAN Chonghao, HAO Pengshuai. Application of Integrated Geophysical Prospecting Technology in Disease Detection of Operating Karst Tunnels [J]. Journal of Chongqing Jiaotong University(Natural Science), 2020, 39(10): 60-66.
[4]	HE Ye1,2, ZHAO Mingjie1, WANG Kui1, JI Yuehui1. Performance of Alternate Vacuum Saturation and Drying Cycles of Sandstone Based on Electrical Resistivity Test [J]. Journal of Chongqing Jiaotong University(Natural Science), 2020, 39(09): 127-131.
[5]	REN Song1,WANG Le1, XIE Kainan1,2, JIANG Deyi1, JIANG Xiang1. Experimental Study on Critical Characteristics of Shale Tension Compression Failure Based on Acoustic Emission Counting Information Entropy [J]. Journal of Chongqing Jiaotong University(Natural Science), 2020, 39(08): 101-107.
[6]	BAO Xiaohua1，ZHANG Yu1，XU Changjie2，FU Yanbin1，CUI Hongzhi1，XIE Xiongyao3. Factors Affecting the Settlement of Double-Line Shield Tunnel Construction [J]. Journal of Chongqing Jiaotong University(Natural Science), 2020, 39(03): 51-60.
[7]	NI Wenbing. Groundwater Buoyancy Based on the Theory of Statics [J]. Journal of Chongqing Jiaotong University(Natural Science), 2020, 39(03): 61-68.
[8]	TANG Hongmei, WANG Ping, WANG Linfeng. RFPA Numerical Simulation of Compression Failure of Variable Cracked Rock Mass [J]. Journal of Chongqing Jiaotong University(Natural Science), 2020, 39(02): 103-110.
[9]	ZHOU Enquan, YI Sihang, XU Xiang, LU Jianfei. Cyclic Liquefaction Characteristics for Saturated Sand Based on Thermodynamic Dissipation [J]. Journal of Chongqing Jiaotong University(Natural Science), 2020, 39(02): 111-117.
[10]	QIN Wanggen1,2，CAI Zhengyin1，GUAN Yunfei1，LI Xiaomei1. Laboratory Tri-axial CD Test of Cement Solidification for Soft Soil in Typical Area [J]. Journal of Chongqing Jiaotong University(Natural Science), 2020, 39(01): 103-108.
[11]	WANG Heng1，JIANG Xiannian1, LI Shujian2, JIA Zhidan1. Degradation Characteristics and Deformation Failure Mode of Perilous Rock Mass in the Three Gorges Reservoir Area [J]. Journal of Chongqing Jiaotong University(Natural Science), 2019, 38(12): 92-96.
[12]	ZHANG Jianjing1 , MA Donghua1 , ZENG Pengyi1, SUN Yanjun2, HE Meng2. Development and Test Analysis of a New Portable Borehole Shear Equipment [J]. Journal of Chongqing Jiaotong University(Natural Science), 2019, 38(11): 90-97.
[13]	WU Jinhua1, YUAN Zhihong2，ZHOU Yongfeng3. Experimental Study on Simulated Similar Materials of Ancient Landslide Marl [J]. Journal of Chongqing Jiaotong University(Natural Science), 2019, 38(10): 81-86.
[14]	SUN Yuan1, TIAN Weiqiang1, LING Dehong1, YANG Qingwen2, YANG Zheng3. Deformation Monitoring and Stability Analysis of Excavation Slope [J]. Journal of Chongqing Jiaotong University(Natural Science), 2019, 38(09): 81-87.
[15]	HONG Wei, XU Chaofan, JI Feng. Stability Analysis on the Excavation of the Material Yard Slope outside the Opening Line of Hydropower Station [J]. Journal of Chongqing Jiaotong University(Natural Science), 2019, 38(08): 80-85.