矩形骨架防护路基边坡浅层稳定性及优化设计

连继峰; 罗强; 蒋良潍; 谢涛; 于曰明

doi:10.11779/CJGE2016S2037

矩形骨架防护路基边坡浅层稳定性及优化设计 English Version

连继峰^{1, 2},
罗强^1,2,,
蒋良潍^{1, 2},
谢涛^{1, 2},
于曰明^{1, 2}

1. 西南交通大学土木工程学院,四川成都 610031;
2. 高速铁路线路工程教育部重点实验室,四川成都 610031

基金项目: 国家重点基础研究发展计划（“973”计划）项目（2013CB036204）; 国家自然科学基金项目（51408491）

详细信息

作者简介:
连继峰(1984- ),男,博士研究生,主要从事路基工程方面研究。E-mail: 453368452@qq.com。

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出版历程
- 收稿日期: 2016-05-18
- 发布日期: 2016-10-19

Shallow stability of subgrade slopes protected by rectangular frame structures and structural optimization

LIAN Ji-feng^{1, 2},
LUO Qiang^1,2,,
JIANG Liang-wei^{1, 2},
XIE Tao^{1, 2},
YU Yue-ming^{1, 2}

1. Dept of Civil Engineering, Southwest Jiaotong University, Chengdu 610031, China;
2. MOE Key Laboratory of High-Speed Railway Engineering, Southwest Jiaotong University, Chengdu 610031, China

摘要

摘要: 为掌握骨架防护结构对路基边坡浅层土体稳定性,基于无限长斜坡浅层顺坡平面失稳模式,开展了矩形横、竖骨架与浅层滑动土体相互作用分析,讨论了骨架框内土体的破坏模式及相应判别方法,构建了以工程造价为目标函数的结构优化模型。分析表明：边坡浅层土体存在沿骨架底部剪切滑动、横骨架挡土被动破坏的两种模式,且模式转换阈值l_sp主要受土体强度、骨架和边坡几何参数影响;边坡浅层稳定安全系数随骨架宽度和厚度的增大分别呈现线性和指数型增加的规律,而随骨架横、竖净距增大均呈现幂函数型降低的规律;l_v=l_sp是在边坡浅层稳定性为约束条件下的矩形骨架最优竖向净距,最优横向净距主要受施工费在总造价中所占权重的影响,并随每延米施工费所占比率的增加而增大。
- 矩形骨架 /
- 边坡防护 /
- 破坏模式 /
- 浅层稳定性 /
- 结构优化
Abstract: In order to understand the influences of frame protection structures on shallow stability of subgrade soil slopes, based on the infinite slope shallow translational slip, the mechanical effects induced by horizontal and vertical frame structures on shallow slope sliding was analyzed are investigated. The failure modes between frame structures and the determination method for their threshold are established. An optimization mode is proposed. It is indicated that there are two modes, shear sliding along the bottom of frame structures and passive earth pressure failure mode due to retaining effect of horizontal frame structures, and the threshold of modes, l_sp, is mainly affected by the soil property, shear strength index and the slope geometric parameters. The factor of safety for slope shallow stability increases linearly and exponentially with the increasing width and thickness of structures, respectively, and decreases with the increasing clear distances between structures. l_v=l_sp is the optimal vertical distance under the constant factor of safety for the slopes. The optimal vertical clear distance may be determined reasonably by the ratios of the construction cost to the total cost, and increases with the increasing percentage of construction fee per meter.
- rectangular frame structure /
- slope protection /
- failure mode /
- shallow stability /
- structural optimization

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参考文献(18)

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矩形骨架防护路基边坡浅层稳定性及优化设计 English Version

作者简介: 连继峰(1984- ),男,博士研究生,主要从事路基工程方面研究。E-mail: 453368452@qq.com。

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Shallow stability of subgrade slopes protected by rectangular frame structures and structural optimization

期刊类型引用(6)

其他类型引用(6)

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作者简介:
连继峰(1984- ),男,博士研究生,主要从事路基工程方面研究。E-mail: 453368452@qq.com。