|Table of Contents|

Comparative study on anti-sliding characteristics of anchor cable micro-pile group in bedding rock slope reinforcement(PDF)

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

Issue:
2025年06期
Page:
140-148
Research Field:
岩土工程
Publishing date:

Info

Title:
Comparative study on anti-sliding characteristics of anchor cable micro-pile group in bedding rock slope reinforcement
Author(s):
REN Qingyang1; 2;  WANG Yanding1; 2;  WANG Kun1; 2;  XIAO Songqiang1; 2;  SHI Jian1; 2
(1. State Key Laboratory of Mountain Bridge and Tunnel Engineering, Chongqing Jiaotong University, Chongqing 400074, China; 2. School of Civil Engineering, Chongqing Jiaotong University, Chongqing 400074, China)
Keywords:
micro-pile group;  prestressed anchor cable;  composite retaining structure;  anti-sliding performance;  stress characteristic
PACS:
TU375
DOI:
10.19815/j.jace.2024.08096
Abstract:
Numerical simulation studies were carried out to investigate the stress mechanisms of anchor cable micro-pile groups and ordinary micro-pile groups under the action of landslide thrust, with the modeling of micro-piles fully considering their plastic deformation characteristics, and the treatment project of bedding rock slopes along Dejiang-Xishui Expressway in Guizhou Province was tooken as an actual case for analysis. The differences in anti-sliding performance between anchor cable micro-pile groups and ordinary micro-pile groups were compared, with a focus on analyzing their performance in force distribution, load transfer, and stability. The results show that the synergistic effect of anchor cables and micro piles significantly improves the stability and anti-sliding ability of slopes. Under the same loading conditions, the safety coefficient of slopes reinforced with anchor cable micro-pile groups is increased by 14.7% compared to ordinary micro-pile groups, and the horizontal displacement at the pile top is reduced by 52.9%. The maximum positive and negative bending moments of the pile body both decrease, with the maximum positive bending moment decreasing by 11.52% and the maximum negative bending moment decreasing by 7.51%. The position of the maximum bending moment point moves towards both sides of the pile on the distant sliding surface, resulting in a more uniform lateral force. The maximum ratio of soil pressure on the pile side between the two is 1:0.97. The pile-anchor load-sharing ratio shows a trend of increasing first and then decreasing, eventually stabilizing. The proposed anchor micro-pile group structure effectively combines the mechanical properties of anchor cables and micro-piles, and has certain engineering reference value.

References:

[1] 雷国平,吴泽雄,苏 栋,等.考虑桩身材料非线性的微型抗滑桩计算p-y法[J].岩土力学,2024,45(增1):337-348.
LEI Guoping, WU Zexiong, SU Dong, et al. A p-y法[J].岩土力学,2024,45(增1):337-348.
LEI Guoping, WU Zexiong, SU Dong, et al. A thod for calculating micro anti-slide piles considering pile material nonlinearity[J]. Rock and Soil Mechanics, 2024, 45(S1): 337-348.
[2]裴振伟,年廷凯,万 驰,等.基于BIM技术的边坡支护结构微型抗滑桩群设计方法[J].自然灾害学报,2022,31(5):193-201.
PEI Zhenwei, NIAN Tingkai, WAN Chi, et al. Design method of slopes reinforced with micro-piles group based on BIM technology[J]. Journal of Natural Disasters, 2022, 31(5): 193-201.
[3]朱彦鹏,成 栋,杨奎斌,等.考虑嵌固段桩前土体弹塑性变形的锚索微型桩群计算模型研究[J].工程科学与技术,2024,56(5):190-202.
ZHU Yanpeng, CHENG Dong, YANG Kuibin, et al. Study on calculation model of anchor cable micro pile group considering elastoplastic deformation of soil in front of embedded pile[J]. Advanced Engineering Sciences, 2024, 56(5): 190-202.
[4]董旭光,董建华,何天虎,等.基于滑坡稳定性的锚索微型桩组合抗滑结构分析[J].应用基础与工程科学学报,2019,27(2):391-403.
DONG Xuguang, DONG Jianhua, HE Tianhu, et al. Analysis of the anchor-micro-pile composite anti-slide structure based on stability of landslide[J]. Journal of Basic Science and Engineering, 2019, 27(2): 391-403.
[5]CHENG J F, LUO X Y, ZHUANG Y Z, et al. Experimental study on dynamic response characteristics of RPC and RC micro piles in SAJBs[J]. Applied Sciences, 2019, 9(13): 2644.
[6]LIU J Y, LIU Y, SONG X H. Research on the reasonable pile spacing of micro pile composite soil nailing[J]. IOP Conference Series:Earth and Environmental Science, 2017, 81(1): 012157.
[7]孙书伟,陈 冲,丁 辉,等.微型桩群加固土坡稳定性分析[J].岩土工程学报,2014,36(12):2306-2314.
SUN Shuwei, CHEN Chong, DING Hui, et al. Stability analysis of earth slopes reinforced with micropiles[J]. Chinese Journal of Geotechnical Engineering, 2014, 36(12): 2306-2314.
[8]朱本珍,孙书伟,郑 静.微型桩群加固堆积层滑坡原位试验研究[J].岩石力学与工程学报,2011,30(增1):2858-2864.
ZHU Benzhen, SUN Shuwei, ZHENG Jing. In-situ testing study of accumulative formation landslide reinforced by micropile group[J]. Chinese Journal of Rock Mechanics and Engineering, 2011, 30(S1): 2858-2864.
[9]周玮宁,李子曦,张 嘎.成层地基微型桩加固浅基础的离心模型试验研究[J].岩土工程学报,2024,46(增1):81-85.
ZHOU Weining, LI Zixi, ZHANG Ga. Centrifugal model tests on micro-pile-reinforced shallow foundation in layered soils[J]. Chinese Journal of Geotechnical Engineering, 2024, 46(S1): 81-85.
[10]胡田飞,朱本珍,刘建坤,等.预应力锚索对微型桩结构抗滑性能影响的试验研究[J].中国铁道科学,2017,38(3):10-18.
HU Tianfei, ZHU Benzhen, LIU Jiankun, et al. Experimental research on effect of prestressed anchor cable on anti-sliding performance of micropile structure[J]. China Railway Science, 2017, 38(3): 10-18.
[11]姜 华.微型桩-锚索联合支护顺层岩质边坡的稳定性分析[J].铁道科学与工程学报,2019,16(9):2184-2191.
JIANG Hua. Stability analysis of bedding rock slope reinforced by micro-piles and prestressed anchor[J]. Journal of Railway Science and Engineering, 2019, 16(9): 2184-2191.
[12]吴立坚,谭冬生,洪 政.微型桩-锚索系统加固边坡影响因素分析[J].铁道工程学报,2014,31(6):24-29,86.
WU Lijian, TAN Dongsheng, HONG Zheng. Analysis of influencing factors on stability of micropile-cable system reinforced slope[J]. Journal of Railway Engineering Society, 2014, 31(6): 24-29, 86.
[13]孟 欣.软硬互层岩质高边坡开挖稳定性分析及治理研究[D].重庆:重庆交通大学,2021.
MENG Xin. Study on stability analysis and treatment of soft hard rock high slope excavation[D]. Chongqing: Chongqing Jiaotong University, 2021.
[14]WON J, YOU K, JEONG S, et al. Coupled effects in stability analysis of pile-slope systems[J]. Computers and Geotechnics, 2005, 32(4): 304-315.
[15]陈丽波.基坑工程中锚索微型桩支护结构设计方法探讨[J].铁道建筑,2016,56(8):116-120.
CHEN Libo. Discussion on design method of supporting structure of anchor cable combined with micro-pile used in foundation pit[J]. Railway Engineering, 2016, 56(8): 116-120.
[16]吴泽雄,雷国平,张院生,等.多排微型抗滑桩极限抗滑力的数值模拟研究[J].建筑科学与工程学报,2024,41(6):171-181.
WU Zexiong, LEI Guoping, ZHANG Yuansheng, et al. Numerical study of ultimate anti-sliding force of multi-row micro anti-slide piles[J]. Journal of Architecture and Civil Engineering, 2024, 41(6): 171-181.
[17]肖国峰,冯光乐,陈从新,等.硬岩中倾顺层边坡变形特征和破坏机制分析[J].岩石力学与工程学报,2007,26(增2):4458-4464.
XIAO Guofeng, FENG Guangle, CHEN Congxin, et al. Research on deformation and failure mechanism of moderate-dip cataclinal hardrock slope[J]. Chinese Journal of Rock Mechanics and Engineering, 2007, 26(S2): 4458-4464.
[18]姜春林,李 晋.微型抗滑桩土拱效应空间特征的细观力学分析[J].岩土力学,2012,33(6):1754-1760,1815.
JIANG Chunlin, LI Jin. Mesomechanical analysis of spatial characteristics of soil arching effect on micro anti-slide pile system[J]. Rock and Soil Mechanics, 2012, 33(6): 1754-1760, 1815.
[19]李 超.锚-微型桩组合结构加固公路边坡技术研究[D].北京:北京交通大学,2017.
LI Chao. Study on the reinforcement of highway slope with composite structure of anchor-micropiles[D]. Beijing: Beijing Jiaotong University, 2017.
[20]王贵华,李长冬,贺 鑫,等.不同布锚方式对锚索抗滑桩受力与变形影响的物理模型试验研究[J].地质科技通报,2022,41(6):262-277,315.
WANG Guihua, LI Changdong, HE Xin, et al. Physical model test on the effect of different anchoring methods on the mechanical and deformation characteristics of anchored slide-resistant piles[J]. Bulletin of Geological Science and Technology, 2022, 41(6): 262-277, 315.

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Last Update: 2025-11-25