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[1]刘源浩,胡仲春,任高峰*,等.既有线路基帮宽施工的形变分析及方案优化[J].武汉工程大学学报,2018,40(02):190-196.[doi:10. 3969/j. issn. 1674?2869. 2018. 02. 014]
 LIU Yuanhao,HU Zhongchun,REN Gaofeng*,et al.Deformation Analysis and Construction Optimization of Subgrade Widening Construction in Existing Line[J].Journal of Wuhan Institute of Technology,2018,40(02):190-196.[doi:10. 3969/j. issn. 1674?2869. 2018. 02. 014]
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既有线路基帮宽施工的形变分析及方案优化(/HTML)
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《武汉工程大学学报》[ISSN:1674-2869/CN:42-1779/TQ]

卷:
40
期数:
2018年02期
页码:
190-196
栏目:
资源与土木工程
出版日期:
2018-05-17

文章信息/Info

Title:
Deformation Analysis and Construction Optimization of Subgrade Widening Construction in Existing Line
文章编号:
20180214
作者:
刘源浩1胡仲春2任高峰*1张聪瑞1炊金强1
1. 武汉理工大学资源与环境工程学院,湖北 武汉 430070;2. 中铁十四局集团有限公司,山东 济南 250014
Author(s):
LIU Yuanhao1HU Zhongchun2REN Gaofeng*1ZHANG Congrui1CHUI Jinqiang1
1. School of Resource and Environmental Engineering,Wuhan University of Technology,Wuhan 430070,China;2. China Railway Shisiju Group Corporation,Jinan 250014,China
关键词:
铁路路基 方案优化 数值计算 路基帮宽 形变分析
Keywords:
railway subgrade construction optimization numerical calculation subgrade widening construction deformation analysis
分类号:
U218
DOI:
10. 3969/j. issn. 1674?2869. 2018. 02. 014
文献标志码:
A
摘要:
铁路既有线单线改复线时,大量涉及路基帮宽施工。构建既有线动静荷载作用下路基帮宽施工模型,采用有限元数值模拟软件ABAQUS分别建立5种不同工况条件下路基施工帮填方案,求解分析新旧路基的动力响应及变形规律。研究结果表明:路基帮宽施工时,其水平位移主要集中在新填路基坡脚处以及旧路基的路基面层,附加竖向位移主要集中在新旧路基结合的底部,且旧路基的竖向位移较小。通过多工况帮填方案对比分析认为,合理的削坡与台阶开挖方案是:先将旧路边坡上层腐殖土清理掉,清理土层厚约为30 cm,再在旧路边坡上开挖台阶,台阶高度在80 cm~100 cm之间,宽度在100 cm~150 cm之间。研究结果可用于类似路基帮宽施工的优化作参考。
Abstract:
During the reconstruction from single line to multiple lines of the existing railway track,a large quantity of subgrade widening is involved and plays a pivotal role. This paper establishes the construction model of the subgrade construction under the static and dynamic loads. The software ABAQUS was utilized for building the subfabricated construction schemes under 5 different working conditions. In addition,the dynamic response and deformation law of the previous and current subgrade were analyzed. The simulated results showed that the horizontal displacements appeared mainly at the foot of the current subgrade and the surface of the previous one. The additional vertical displacements mainly occurred at the conjugated bottom of the previous and current subgrade,besides,the vertical displacements of the previous subgrade were normally small. Based on the analysis of 5 schemes under different working conditions,the optimized scheme including the slope cutting and step excavation was obtained. First,the humus with a thickness of 30 cm on the surface of the previous subgrade slope was cleaned up. Second,several steps with a height of 80 cm-100 cm and width of 100 cm-150 cm at the same place were excavated. These results can be used to optimize the construction of similar road bed.

参考文献/References:

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备注/Memo

备注/Memo:
收稿日期:2017-08-18基金项目:国家自然科学基金(51774220);中央高校基本科研业务费专项资金(20171136GX)作者简介:刘源浩,硕士研究生。E-mail:haoziyijiu123@163.com*通讯作者:任高峰,博士,教授。E-mail:rgfwhut@163.com引文格式:刘源浩,胡仲春,任高峰,等. 既有线路基帮宽施工的形变分析及方案优化 [J]. 武汉工程大学学报,2018,40(2):190-196
更新日期/Last Update: 2018-04-25