[1]姚学昌,林福宽.列车轴质量和土工格室加固道砟对路基沉降的影响[J].华侨大学学报(自然科学版),2024,45(2):226-232.[doi:10.11830/ISSN.1000-5013.202311008]
　YAO Xuechang,LIN Fukuan.Influence of Train Axle Mass and Geocell Reinforcement Ballast on Roadbed Settlement[J].Journal of Huaqiao University(Natural Science),2024,45(2):226-232.[doi:10.11830/ISSN.1000-5013.202311008]
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列车轴质量和土工格室加固道砟对路基沉降的影响()
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《华侨大学学报（自然科学版）》[ISSN:1000-5013/CN:35-1079/N]

卷:
第45卷
期数:
2024年第2期
页码:
226-232
栏目:
出版日期:
2024-03-20

文章信息/Info

Title:
Influence of Train Axle Mass and Geocell Reinforcement Ballast on Roadbed Settlement
文章编号:
1000-5013(2024)02-0226-07
作者:
姚学昌1;  林福宽2
1. 广东省公路建设有限公司, 广东 广州 515000;2. 中交公路长大桥建设国家工程研究中心有限公司, 北京 100088
Author(s):
YAO Xuechang1;  LIN Fukuan2
1. Guangdong Provincial Highway Construction Limited Company, Guangzhou 515000, China; 2. CCCC Highway Bridges National Engineering Research Centre Limited Company, Beijing 100088, China
关键词:
道床沉降;  土工格室;  轴质量;  数值模拟;  动荷载
Keywords:
track bed settlement;  numerical simulation;  dynamic load;  geocell;  axle mass
分类号:
U213.1
DOI:
10.11830/ISSN.1000-5013.202311008
文献标志码:
A
摘要:
建立有砟轨道-路基三维有限元模型和土工格室模型,利用相位荷载模拟列车动荷载,研究列车轴质量和土工格室加固道砟对路基沉降的影响。模拟结果表明:在正弦相位荷载作用下,各轨枕之间位移变化基本一致;随着列车轴质量的增加,有砟轨道沉降显著增加;铺设土工格室加固后,有砟轨道的侧向位移和竖向沉降分别降低了约60%和11%;在重载情况下,土工格室加固效率有所降低,但改变土工格室刚度可以改变其加固效率;当土工格室刚度在400~800 MPa时,对重载路基的加固效果较好。
Abstract:
A 3-dimensional finite element model and a geocell model of ballast subgrade are established. The phase loads are used to simulate the train dynamic load. The influence of train axle mass and geocell reinforcement ballast on roadbed settlement is studied. The simulation results show that the displacement changes between each sleeper are basically consistent under the action of sinusoidal phase load. With the increasing of the train axis mass, the ballast settlement increases obviously. After laying geocell reinforces, the lateral displacement and vertical settlement of ballast reduce by 60% and 11%, respectively. Under the heavy load conditions, the reinforcement efficiency of geogrid reduces, but the stiffness of geocell can change its reinforcement efficiency. When the stiffness of geocell is between 400-800 MPa, the reinforcement effect on heavy-load roadbeds is favorable.

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备注/Memo

备注/Memo:
收稿日期: 2023-11-08
通信作者: 姚学昌(1971-),男,高级工程师,主要从事高速公路建设的研究。E-mail:372643491@qq.com。
基金项目: 广澳高速公路改扩建科研资助项目(GAGSKY-2022-02)
更新日期/Last Update: 2024-03-20