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铁道科学与工程学报

JOURNAL OF RAILWAY SCIENCE AND ENGINEERING

第13卷    第2期    总第71期    2016年2月

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文章编号:1672-7029(2016)02-0269-07
防滑铲处治斜坡软弱地基路堤工作机理探讨
吴玉1,2,3,蒋鑫1,2,3,姜春亮1,2,3,朱奇炯4,邱延峻1,2,3

(1.西南交通大学土木工程学院,四川成都 610031;
2.西南交通大学道路工程四川省重点实验室,四川成都 610031;
3.西南交通大学高速铁路线路工程教育部重点实验室,四川成都 610031;
4.上海铁路局杭州工务段,浙江杭州 310009
)

摘 要: 为探讨防滑铲处治斜坡软弱地基路堤的工作机理,基于刚体极限平衡法软件Slide,建立防滑铲处治斜坡软弱地基路堤的计算模型,对比有无防滑铲时可能滑动带、最危险滑动面的区别,获得稳定安全系数与地层坡度、防滑铲深度的动态变化关系,结合敏感度分析,明确土体材料参数对路堤稳定性的影响程度,并提出联合其他措施共同处治、回填材料应以重度控制为准等优化设计途径。

 

关键字: 道路工程;斜坡软弱地基路堤;防滑铲;刚体极限平衡法;敏感度分析;优化设计

Working mechanism of slide-resistant shovel used in embankmentover sloped weak ground
WU Yu1,2,3, JIANG Xin1,2,3,JIANG Chunliang1,2,3,ZHU Qijiong4, QIU Yanjun1,2,3

1.School of Civil Engineering, Southwest Jiaotong University, Chengdu 610031, China;
2. Highway Engineering of Key Laboratory of Sichuan Province, Southwest Jiaotong University, Chengdu 610031, China
3. MOE Key Laboratory of High-speed Railway Engineering, Southwest Jiaotong University, Chengdu 610031, China;
4. Hangzhou Railway Section, Shanghai Railway Administration, Hangzhou 310009, China

Abstract:In order to obtain the working mechanism of embankment over sloped weak ground reinforced by slide-resistant shovel, the corresponding model was established based on Slide software developed by rigid body limit equilibrium method. Potential slip bands and the critical slip surfaces with and without slide-resistant shovel were compared. The dynamic relationship between factor of safety and the stratum slope, the slide-resistant shovel depth were obtained. Sensitivity analysis was conducted to obtain the effect of variability in the values of soil material parameters. Design optimization approach was put forward, for example, slide-resistant shovel works with other measurements simultaneously and backfill materials should be subject to unit weight, and so on.

 

Key words: road engineering; embankment over sloped weak ground; slide-resistant shovel; rigid body limit equilibrium method; sensitivity analysis; design optimization

ISSN 1672-7029
CN 43-1423/U

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