地震作用下锚固参数对岩体边坡锚固界面剪应力分布影响分析

言志信; 屈文瑞; 龙哲; 董建华; 江平

doi:10.11779/CJGE201811018

地震作用下锚固参数对岩体边坡锚固界面剪应力分布影响分析 English Version

言志信^1,2,
屈文瑞¹,
龙哲¹,
董建华³,
江平^1, ,

1. 兰州大学土木工程与力学学院,甘肃兰州 730000;
2. 河南城建学院土木与交通工程学院,河南平顶山 467036;
3. 西部土木工程防灾减灾教育部工程研究中心,甘肃兰州 730050

基金项目: 国家自然科学基金面上项目（41372307,51478065）; 甘肃省建设科技攻关项目（kjxm2014-42,JK2013-20）

详细信息

作者简介:
言志信(1961- ),男,湖南株洲人,博士（后）,特聘教授,博士生导师,主要从事土木工程和地质工程方面的研究工作。E-mail：yzx10@163.com。

通讯作者:
江平，E-mail：jp61@163.com

中图分类号: TU435
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- 文章访问数: 241
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出版历程
- 收稿日期: 2017-09-11
- 发布日期: 2018-11-24

Influences of anchorage parameters on distribution of shear stress at anchorage interface of rock slopes under earthquakes

1. School of Civil Engineering and Mechanics, Lanzhou University, Lanzhou 730000, China;
2. School of Civil and Traffic Engineering, Henan University of Urban Construction, Pingdingshan 467000, China;
3. Western Engineering Research Center of Disaster Mitigation in Civil Engineering of Ministry of Education, Lanzhou 730050, China

摘要

摘要: 基于FLAC^3D软件,以含软弱层的锚固岩质边坡为研究对象,通过修正的cable单元建模和改进剪应力提取方法,利用数值模拟方法系统地分析研究了地震作用下锚固参数对含软弱层岩体边坡锚固界面剪应力分布的影响。研究发现：随砂浆层厚度增加,砂浆-岩体界面脱黏增长,杆体-砂浆界面脱黏减小;随锚杆横截面积增大,锚固界面剪应力向锚头和锚根转移,脱黏增长;适当增加锚固段长度和减小锚杆间距均有利于边坡稳定;一定的锚固段长度下宜适当增大锚杆倾角。揭示了地震作用下锚固参数对边坡锚固界面剪应力分布和锚固机理的影响,对边坡锚固的设计施工具有重要参考价值。
- 岩质边坡 /
- 锚固 /
- 杆体-砂浆界面 /
- 砂浆-岩体界面 /
- 峰值剪应力 /
- 锚固参数
Abstract: Based on the FLAC^3D software, by modifying the cable unit and improving the shear stress extraction method, a numerical model for anchored rock slopes with weak interlayer is established. The influences of anchorage parameters on the distribution of shear stress at the anchorage interface of rock slopes with weak interlayer under earthquakes are analyzed. The results show that the thickness of mortar layer increases, the debonding length of mortar-rock interface increases, and the debonding length of bolt-mortar interface decreases. The cross-sectional area of bolts increases, the shear stress at anchorage interface transfers towards the head and roots of bolts, and the debonding length increases. Properly increasing the length of anchorage section and reducing the spacing between the bolts are beneficial to slope stability. Under a certain anchorage length, the anchorage angle should be increased appropriately. The influences of anchorage parameters on the distribution of shear stress and the anchorage mechanism of the anchorage interface under seismic condition are revealed. It is of important reference value for the design and construction of slope anchorage.
- rock slope /
- anchorage /
- bolt-mortar interface /
- mortar-rock interface /
- peak shear stress /
- anchorage parameter

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参考文献(12)

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