Monitoring Analysis and Prediction of Longitudinal Differential Settlement of Track Structures in Bridge-subgrade Transition Sections in Existing Heavy-haul Railways

被引：0

作者：

Leng W. ^{[1
,2
]}

Zhou S. ^{[1
]}

Nie R. ^{[1
,2
]}

Cheng L. ^{[3
]}

Tu R. ^{[1
,2
]}

Fan R. ^{[3
]}

机构：

[1] School of Civil Engineering, Central South University, Changsha

[2] Key Laboratory of Heavy-Haul Railway Engineering Structure, Ministry of Education, Changsha

[3] China Railway Siyuan Survey and Design Group Co., Ltd., Wuhan

来源：

Tiedao Xuebao/Journal of the China Railway Society | 2021年 / 43卷 / 06期

关键词：

Bridge-subgrade transition zone; Differential settlement; Existing heavy-haul railway; Settlement prediction and analysis;

D O I：

10.3969/j.issn.1001-8360.2021.06.020

中图分类号：

学科分类号：

摘要：

In the existing heavy-haul railways, the transition section, as the weakest link with the most concentrated damages, the most frequent maintenance, and the highest maintenance investment, has always been a key area for operational management, inspection and maintenance. By using horizontal inclinometers, the differential settlement of track structures in bridge-subgrade transition section in Shuozhou-Huanghua heavy haul railway (from Shuozhou in Shanxi Province to Huanghua in Hebei Province) was subjected to long-term field monitoring, to study the distribution characteristics and change laws of the differential settlement and settlement rate. The results show that the longer the distance to the side pier of the bridge along the longitudinal direction of the railway, the greater the differential settlement, the settlement rate and their variation range. In addition, with the increase in the train passing tonnage, the differential settlement grows gradually, while its growth rate gradually decreases until being stable finally. Meanwhile, the exit side of the bridge exhibits more stable settlement and deformation which are distributed more uniformly along the longitudinal direction of the railway. Furthermore, the hyperbolic model, the exponential curve model, and the combined prediction model of the two were used to predict the differential settlement of the transition section. The results suggest that the combined prediction model shows the most satisfactory prediction effect, followed by the exponential curve model, while the hyperbolic model has relatively higher prediction deviation. The research achievements offer guidance and reference for the subsequent research on the characteristics of differential settlement of bridge-subgrade transition sections and the design and construction of track structures in transition sections in heavy-haul railways. © 2021, Department of Journal of the China Railway Society. All right reserved.

引用

页码：150 / 157

页数：7

共 19 条

[1] (2014)
[2] ZHAI W M, TRUE H., Vehicle-track Dynamics on a Ramp and on the Bridge: Simulation and Measurements, Vehicle System Dynamics, 33, S1, pp. 604-615, (1999)
[3] LI D Q, DAVIS D., Transition of Railroad Bridge Approaches, Journal of Geotechnical and Geoenvironmental Engineering, 131, 11, pp. 1392-1398, (2005)
[4] MARTIN G R, LAM I P, YAN L P, Et al., Bridge Abutments-modelling for Seismic Response Analysis, Proceedings of the 4th Caltrans Seismic Research Workshop, (1996)
[5] DI Honggui, LENG Wuming, XUE Jilian, Et al., Assessment of Subgrade Strength for Transport Capacity Enlargement of Shuo-Huang Heavy-haul Railway, Journal of the China Railway Society, 36, 8, pp. 84-90, (2014)
[6] CHEN Guoyuan, TANG Xiaodi, WEI Limin, Comparative Analysis of the Settlement Distribution for Roadbridge Transition Section of the Passenger Line, Journal of Central South University of Forestry & Technology, 28, 2, pp. 151-155, (2008)
[7] CHEN Xuehua, LU Wentian, WANG Yonghe, Study on the Dynamic Response of High Speed Railway Bridge-subgrade Transition Section, Journal of Vibration and Shock, 25, 3, pp. 95-98, (2006)
[8] HAN Zili, Research on the Countermeasure of Railway Subgrade on Existing Railways, China Railway Science, 23, 2, pp. 53-58, (2002)
[9] LIU Linya, LEI Xiaoyan, LIU Xiaoyan, Design and Evaluation of Dynamics Performance of Roadbed-bridge Transition Section in Existing Railways, Railway Standard Design, 48, 1, pp. 9-10, (2004)
[10] (2014)

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