路堑边坡施工过程离心模型试验及数值模拟研究

›› 2010, Vol. 31 ›› Issue (S2): 422-427.

路堑边坡施工过程离心模型试验及数值模拟研究

黄井武^{1, 2}，陈晓平¹，周秋娟¹

1. 暨南大学力学与土木工程系，广州 510632；2. 广东省水利电力勘测设计研究院，广州 510170

收稿日期:2010-08-02 出版日期:2010-12-10 发布日期:2011-01-12
作者简介:黄井武，男，1980年生，博士研究生，工程师，主要从事岩土工程边坡方面的研究。
基金资助:
广东省水利科技创新项目（No. YSK2009-01）；广东省公路研发项目（粤公院［2007］研发05号）。

Centrifugal model test and numerical analysis of cutting slope during construction

HUANG Jing-wu ^{1, 2}，CHEN Xiao-ping²，ZHOU Qiu-juan¹

1. Department of Mechanics and Civil Engineering, Jinan University，Guangzhou 510632，China； 2. Guangdong Hydropower Planning & Design Institute，Guangzhou 510170，China

Received:2010-08-02 Online:2010-12-10 Published:2011-01-12

摘要/Abstract

摘要：

以粤北山区高速公路某路堑边坡为研究对象，通过离心模型试验及有限元模拟其施工过程，揭示开挖卸荷过程中的变形特性及稳定机制，探讨锚杆在边坡稳定中发挥的作用。结果表明，开挖卸荷引起松弛变形，变形量从坡顶向坡脚逐渐增大，从开挖临空面向坡体内部逐渐减小，最大值出现在坡脚，且在坡脚形成塑性区；锚杆支护后提高了加固部分土体的强度，减小了下级开挖引起的松弛变形，限制坡脚塑性区的发展。锚杆轴力沿杆体不均匀分布，其规律与锚杆长度有关，且一般下层锚杆轴力较上层大。锚杆支护不仅提高施工期的稳定，还可有效减弱应变软化对边坡长期稳定的不利影响，提高安全储备。研究成果对高速公路路堑边坡的设计及施工具有指导意义。

关键词: 路堑边坡, 离心模型试验, 数值分析, 锚杆

Abstract:

Regarding a cutting slope of express highway in the mountains of northern Guangdong as the research object, through centrifugal model test and finite element analysis, the deformation characteristics and the mechanism of slope stability during the construction process were revealed; the effect of anchor bolt on slope stability was discussed. Results show that: the excavation caused slack deformation, and the value of deformation increased gradually from top to toe and reduced gradually from free surface to interior. The maximum displacement and plastic zone appeared near the toe. After anchor bolt support, the strength of the supported soil was improved; the slack deformation caused by the lower stage excavation was reduced; and the development of the plastic zone in the toe was restricted. The axial forces distributed differently along the anchor, which was concerned with its length; and generally the axial force of lower anchor bolt was greater than the upper one. The anchor bolt not only improved the stability of slope during construction, but also effectively weakened strain softening on the adverse effects of long-term slope stability and improved the safety factor of slope stability. The results obtained have some guidance meaning for the design and construction of cutting slopes.

Key words: cutting slope, centrifugal model test, numerical analysis, anchor bolt

中图分类号:

TU 443

黄井武，陈晓平，周秋娟. 路堑边坡施工过程离心模型试验及数值模拟研究[J]. , 2010, 31(S2): 422-427.

HUANG Jing-wu，CHEN Xiao-ping，ZHOU Qiu-juan. Centrifugal model test and numerical analysis of cutting slope during construction[J]. , 2010, 31(S2): 422-427.

参考文献

相关文章 15

[1]	王国辉, 陈文化, 聂庆科, 陈军红, 范晖红, 张川, . 深厚淤泥质土中基坑开挖对基桩影响的离心模型试验研究[J]. 岩土力学, 2020, 41(2): 399-407.
[2]	郭院成, 李明宇, 张艳伟, . 预应力锚杆复合土钉墙支护体系增量解析方法[J]. 岩土力学, 2019, 40(S1): 253-258.
[3]	王钦科, 马建林, 陈文龙, 杨彦鑫, 胡中波, . 上覆土嵌岩扩底桩抗拔承载特性离心模型试验及计算方法研究[J]. 岩土力学, 2019, 40(9): 3405-3415.
[4]	朱才辉, 崔晨, 兰开江, 东永强. 砖-土结构劣化及入侵建筑物拆除对榆林卫城稳定性影响[J]. 岩土力学, 2019, 40(8): 3153-3166.
[5]	詹良通, 胡英涛, 刘小川, 陈捷, 王瀚霖, 朱斌, 陈云敏. 非饱和黄土地基降雨入渗离心模型试验及多物理量联合监测[J]. 岩土力学, 2019, 40(7): 2478-2486.
[6]	冯君, 王洋, 吴红刚, 赖冰, 谢先当, . 玄武岩纤维复合材料土层锚杆抗拔性能现场试验研究[J]. 岩土力学, 2019, 40(7): 2563-2573.
[7]	言志信, 龙哲, 屈文瑞, 张森, 江平, . 地震作用下含软弱层岩体边坡锚固界面剪切作用分析[J]. 岩土力学, 2019, 40(7): 2882-2890.
[8]	周小文, 程力, 周密, 王齐, . 离心机中球形贯入仪贯入黏土特性[J]. 岩土力学, 2019, 40(5): 1713-1720.
[9]	徐鹏, 蒋关鲁, 王珣, 黄昊威, 黄哲, 王智猛, . 面板对加筋土挡墙影响的离心模型试验研究[J]. 岩土力学, 2019, 40(4): 1427-1432.
[10]	李世俊, 马昌慧, 刘应明, 韩玉珍, 张彬, 张嘎, . 离心模型试验与数值模拟相结合研究采空边坡渐进破坏特性[J]. 岩土力学, 2019, 40(4): 1577-1583.
[11]	吴秋红, 赵伏军, 王世鸣, 周志华, 王斌, 李玉, . 动力扰动下全长黏结锚杆的力学响应特性[J]. 岩土力学, 2019, 40(3): 942-950.
[12]	李宁, 杨敏, 李国锋. 再论岩土工程有限元方法的应用问题[J]. 岩土力学, 2019, 40(3): 1140-1148.
[13]	郑黎明, 张洋洋, 李子丰, 马平华, 阳鑫军, . 低频波动下考虑孔隙度与压力不同程度变化的岩土固结渗流分析[J]. 岩土力学, 2019, 40(3): 1158-1168.
[14]	李林, 李镜培, 孙德安, 龚卫兵, . 考虑沉桩效应的群桩非线性荷载-沉降解析[J]. 岩土力学, 2019, 40(2): 668-677.
[15]	梁波, 厉彦君, 凌学鹏, 赵宁雨, 张青松, . 离心模型试验中微型土压力盒土压力测定[J]. 岩土力学, 2019, 40(2): 818-826.

Metrics

Viewed

Full text

Abstract

Cited

Shared

Discussed