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

卷:

42卷

期数:

2025年06期

页码:

140-148

栏目:

岩土工程

出版日期:

2025-11-25

文章信息/Info

Title:

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

文章编号:

1673-2049(2025)06-0140-09

作者:

任青阳^1,2,王彦丁^1,2,王坤^1,2,肖宋强^1,2,施俭^1,2

(1. 重庆交通大学 山区桥梁及隧道工程国家重点实验室,重庆 400074; 2. 重庆交通大学 土木工程学院,重庆 400074)

Author(s):

REN Qingyang^1,2, WANG Yanding^1,2, WANG Kun^1,2, XIAO Songqiang^1,2, SHI Jian^1,2

(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)

关键词:

微型桩群;  预应力锚索;  组合支挡结构;  抗滑性能;  受力特性

Keywords:

micro-pile group;  prestressed anchor cable;  composite retaining structure;  anti-sliding performance;  stress characteristic

分类号:

TU375

DOI:

10.19815/j.jace.2024.08096

文献标志码:

A

摘要:

对锚索微型桩群与普通微型桩群在滑坡推力作用下的受力机制开展了数值模拟研究,其中微型桩的建模充分考虑了其塑性变形的特性,并以贵州省德江至习水高速公路沿线的顺层岩质边坡治理工程为实际案例进行分析。对比了锚索微型桩群和普通微型桩群在抗滑性能上的差异,重点分析了两者在受力分布、荷载转移和稳定性方面的表现。结果表明:通过锚索和微型桩的协同作用显著提高了边坡稳定性和抗滑能力,在相同加载条件下,锚索微型桩群结构相比普通微型桩群加固后的边坡安全系数提高了14.7%,桩顶水平位移减小52.9%; 桩身最大正负弯矩均减小,其中最大正弯矩减少11.52%,最大负弯矩减少7.51%,最大弯矩点位置向远距离滑动面的桩体两侧移动,横向受力更为均匀,二者桩侧土压力最大比值为1:0.97; 桩-锚荷载分担比呈现出先增大后减小的趋势,最终趋于稳定; 提出的锚索微型桩群结构较好地结合了锚索与微型桩的力学性能,具有一定的工程参考价值。

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.

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相似文献/References:

[1]杨敏,刘斌.土钉抗拔承载力经验验算方法[J].建筑科学与工程学报,2010,27(02):18.
　YANG Min,LIU Bin.Empirical Checking Method for Soil Nailing Anti-pulling Capacity[J].Journal of Architecture and Civil Engineering,2010,27(06):18.
[2]郑明新,阮钰华,胡红萍,等.基于Pasternak地基模型的微型桩群计算方法研究[J].建筑科学与工程学报,2025,42(06):149.[doi:10.19815/j.jace.2024.09047]
　ZHENG Mingxin,RUAN Yuhua,HU Hongping,et al.Research on calculation method of micro-pile group based on Pasternak foundation model[J].Journal of Architecture and Civil Engineering,2025,42(06):149.[doi:10.19815/j.jace.2024.09047]

备注/Memo

备注/Memo:

收稿日期:2024-08-26
基金项目:国家重点研发计划项目(2023YFC3008300,2023YFC3008304-4); 国家自然科学基金项目((U20A20314)
作者简介:任青阳(1975-),男,工学博士,教授,博士生导师,E-mail:qyren@cqjtu.edu.cn。
通信作者:王彦丁(1997-),女,工学博士研究生,E-mail:1528029341@qq.com。

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更新日期/Last Update: 2025-11-25