桥上有砟道床阻力特性及尺寸优化研究

Abstract
Figure/Table
References
Related Citation (1)

Download: PDF (489 KB) HTML (1 KB)
Export: BibTeX | EndNote (RIS)

Abstract Research purposes: The discrete element simulation model of ballast bed on bridge is established and calibrated through full-scale ballast bed resistance test. We analyze the influences of section parameters such as width and thickness of ballast bed on ballast bed resistance, also discuss the influence range of transverse resistance and the sharing characteristics of each part of ballast bed on resistance. In order to reduce the second phase dead load and create conditions for bridge design, we put forward the optimization suggestions of ballast bed size on long-span bridge.
Research conclusions:(1) Within a certain range of width of the bed, the resistance increases with the top width increasing. When the top width increases from 3 400 mm to 3 800 mm, the increase rate of lateral resistance decreases from 16.9% to 4.6%, and the longitudinal resistance is less affected by the top width. (2) Within a certain range of thickness of the bed, the resistance increases with thickness increasing. When the thickness increases from 250 mm to 450 mm, the increase rate of lateral resistance decreases from 31.4% to 5.9%, and the increase rate of longitudinal resistance decreases from 18.6% to 4.0%. (3) The ballast within the width of 400 mm from the sleeper end is the main area to provide lateral resistance. (4) The resistance of ballast bed is mainly composed of the resistance of sleeper bottom, sleeper side and sleeper end, in which the lateral resistance of sleeper bottom is about 62%, sleeper side is about 14%, and sleeper end is about 24%. (5) Considering the resistance, economy and operation and maintenance requirements of ballast bed, it is suggested that the top width and thickness of ballast bed on bridge should be 3 400 mm and 300 mm respectively. (6) The research conclusions can provide a theoretical reference for the size optimization of ballast bed section on long-span bridges.

Key words： ballast bed on bridge ballast bed section ballast bed resistance size optimization discrete element method

Received: 30 July 2021

PACS:

U213.71

	Service

	E-mail this article
	Add to my bookshelf
	Add to citation manager
	E-mail Alert
	RSS
	Articles by authors
	XIAO Jieling
	XU Yi
	JING Pu
	QIAO Longxing
	YU Sixin
	LIU Junfeng

Cite this article:

XIAO Jieling,XU Yi,JING Pu, et al. Resistance Characteristics and Size Optimization of Ballast Bed on Bridge[J]. Journal of Railway Engineering Society, 2022, 39(9): 26-30.

URL:

https://tdgcxb.crec.cn/EN/ OR https://tdgcxb.crec.cn/EN/Y2022/V39/I9/26

[1]	林红松,杨吉忠,颜华.高速铁路大跨度钢桁梁斜拉桥轨道型式研究[J].铁道工程学报,2014(4):75-80.Lin Hongsong, Yang Jizhong, Yan Hua. Research on the Track Type of Large Span Steel Truss Cable Stayed Bridge for High Speed Railway[J]. Journal of Railway Engineering Society, 2014(4):75-80.
[2]	伍卫凡.高原铁路大跨桥梁轨道结构选型研究[J].铁道标准设计,2022(6):8-12.Wu Weifan. Type Selection of Track Structure on Long Span Bridge of Railway[J].Railway Standard Design, 2022(6):8-12.
[3]	周华龙,杨文茂.大跨桥上线路调坡及板式道床铺设方法研究[J].铁道工程学报,2020(8):35-40.Zhou Hualong, Yang Wenmao. Research on the Route Gradient Adjustment and Track Slab Paving Method on Long-span Bridge[J]. Journal of Railway Engineering Society,2020(8):35-40.
[4]	曾志平,宋善义,王卫东,等.基于离散元法的有砟道床阻力特性研究[J].铁道工程学报,2018(7):11-16.Zeng Zhiping, Song Shanyi, Wang Weidong, etc. Research on the Ballast Bed Resistance Characteristics Based on Discrete Element Method[J]. Journal of Railway Engineering Society, 2018(7):11-16.
[5]	韩义涛,尤睿,李粮余,等.米轨铁路钢枕有砟道床横向阻力试验与仿真[J].铁道工程学报,2021(2):58-62.Han Yitao, You Rui, Li Liangyu, etc. Experiment and Simulation of Lateral Resistance of Meter-gage Railway Ballast Bed for Steel Sleeper[J]. Journal of Railway Engineering Society,2021(2):58-62.
[6]	韦凯,尤睿,马宏辉,等.米轨混凝土枕道床横向阻力离散元数值模拟[J].铁道工程学报,2020(5):7-11.Wei Kai, You Rui, Ma Honghui, etc. Discrete Element Numerical Simulation of Lateral Resistance of Meter-gage Railway Ballast Bed for Concrete Sleeper[J].Journal of Railway Engineering Society,2020(5):7-11.
[7]	Xiao Jieling, Liu Ganzhong, Liu Jianxing. Parameters of a Discrete Element Ballasted Bed Model Based on a Response Surface Method[J]. Journal of Zhejiang University-Science A:Applied Physics & Engineering, 2019(9):685-700.