Analytical study on high-speed railway track deformation under long-term bridge deformations and interlayer degradation

Structures ◽  
2021 ◽  
Vol 29 ◽  
pp. 1005-1015
Author(s):  
Hongye Gou ◽  
Rui Xie ◽  
Chang Liu ◽  
Yi Bao ◽  
Qianhui Pu
Keyword(s):  
High Speed ◽  
Analytical Study ◽  
Railway Track ◽  
High Speed Railway ◽  
Track Deformation

Effect of Long-Term Bridge Deformations on Safe Operation of High-Speed Railway and Vibration of Vehicle–Bridge Coupled System

2019 ◽  
Vol 19 (09) ◽  
pp. 1950111 ◽  
Author(s):  
Hongye Gou ◽  
Longcheng Yang ◽  
Zhixiang Mo ◽  
Wei Guo ◽  
Xiaoyu Shi ◽  
...  
Keyword(s):  
High Speed ◽  
Measurement Data ◽  
Coupled System ◽  
Bridge Pier ◽  
Railway Track ◽  
Vertical Acceleration ◽  
High Speed Train ◽  
High Speed Trains ◽  
Track Deformation

Operation safety of high-speed trains is dependent on their vibration characteristics, which vary with bridge deformation. This paper studies the influence of bridge pier settlement and girder creep camber, which are two typical types of long-term bridge deformation, on the vibration of high-speed trains. To this end, an analytical approach is presented to link the bridge deformation with railway track deformation; the track deformation is used to analyze the vibration of the CRH2 high-speed train in China. The vibration analysis results are validated using the in-situ measurement data. The present study shows that bridge pier settlement greatly affects the vertical acceleration, derailment coefficient and wheel unloading rate of the high-speed train; incorporating bridge girder camber aggravates the vibration of the train–bridge system. The threshold of bridge pier settlement is suggested to be 11.1[Formula: see text]mm for trains moving at 350[Formula: see text]km/h with regard to the code-specified vibration limit. This study has significant implications for the design and operation of high-speed railways.

scholarly journals Full-scale multi-functional test platform for investigating mechanical performance of track–subgrade systems of high-speed railways

2020 ◽  
Vol 28 (3) ◽  
pp. 213-231
Author(s):  
Wanming Zhai ◽  
Kaiyun Wang ◽  
Zhaowei Chen ◽  
Shengyang Zhu ◽  
Chengbiao Cai ◽  
...  
Keyword(s):  
High Speed ◽  
Mechanical Performance ◽  
Full Scale ◽  
Functional Test ◽  
Railway Track ◽  
High Speed Railway ◽  
Ballastless Track ◽  
Railway Infrastructure ◽  
Test Platform

Abstract Motivated by the huge practical engineering demand for the fundamental understanding of mechanical characteristics of high-speed railway infrastructure, a full-scale multi-functional test platform for high-speed railway track–subgrade system is developed in this paper, and its main functions for investigating the mechanical performance of track–subgrade systems are elaborated with three typical experimental examples. Comprising the full-scale subgrade structure and all the five types of track structures adopted in Chinese high-speed railways, namely the CRTS I, the CRTS II and the CRTS III ballastless tracks, the double-block ballastless track and the ballasted track, the test platform is established strictly according to the construction standard of Chinese high-speed railways. Three kinds of effective loading methods are employed, including the real bogie loading, multi-point loading and the impact loading. Various types of sensors are adopted in different components of the five types of track–subgrade systems to measure the displacement, acceleration, pressure, structural strain and deformation, etc. Utilizing this test platform, both dynamic characteristics and long-term performance evolution of high-speed railway track–subgrade systems can be investigated, being able to satisfy the actual demand for large-scale operation of Chinese high-speed railways. As examples, three typical experimental studies are presented to elucidate the comprehensive functionalities of the full-scale multi-functional test platform for exploring the dynamic performance and its long-term evolution of ballastless track systems and for studying the long-term accumulative settlement of the ballasted track–subgrade system in high-speed railways. Some interesting phenomena and meaningful results are captured by the developed test platform, which provide a useful guidance for the scientific operation and maintenance of high-speed railway infrastructure.

Research of the Key Control Parameters Standard for Shield Tunnel Under-Crossing High Speed Railway

2014 ◽  
Vol 580-583 ◽  
pp. 1273-1278
Author(s):  
Zhe Liu ◽  
Ping He
Keyword(s):  
High Speed ◽  
Large Scale ◽  
Railway Track ◽  
Shield Tunnel ◽  
Element Analysis ◽  
High Speed Railway ◽  
Design Specifications ◽  
Deformation Law ◽  
Track Deformation ◽  
Track Irregularities

This paper takes a new shield tunnel as the research object, which intends to cross a section of a high speed railway. Based on design specifications and the existing monitoring data to analyze the change rule of track irregularities, this article proposes the control of wavelength and relevant amplitude in the above case, following the design specifications and long-wave irregularity management demands of high-speed highway. And the controlling values of wavelength and amplitude required are presented with the outcome of the range of the settlement trough, drawn out of the under-crossing process. And it also uses large-scale non-linear finite element analysis software to simulate the high speed railway track deformation in actual constructions, to test whether the deformation meet the requirements of the control standards and deformation law. The results can provide reference for the construction measure when shield tunnel under crosses the high speed railway in the future.

scholarly journals The Design and Implementation of an Inertial GNSS Odometer Integrated Navigation System Based on a Federated Kalman Filter for High-Speed Railway Track Inspection

2021 ◽  
Vol 11 (11) ◽  
pp. 5244
Author(s):  
Xinchun Zhang ◽  
Ximin Cui ◽  
Bo Huang
Keyword(s):  
Kalman Filter ◽  
Navigation System ◽  
High Speed ◽  
Measurement Accuracy ◽  
Railway Track ◽  
Filter Method ◽  
Integrated Navigation ◽  
High Speed Railway ◽  
Track Geometry ◽  
Integrated Navigation System

The detection of track geometry parameters is essential for the safety of high-speed railway operation. To improve the accuracy and efficiency of the state detector of track geometry parameters, in this study we propose an inertial GNSS odometer integrated navigation system based on the federated Kalman, and a corresponding inertial track measurement system was also developed. This paper systematically introduces the construction process for the Kalman filter and data smoothing algorithm based on forward filtering and reverse smoothing. The engineering results show that the measurement accuracy of the track geometry parameters was better than 0.2 mm, and the detection speed was about 3 km/h. Thus, compared with the traditional Kalman filter method, the proposed design improved the measurement accuracy and met the requirements for the detection of geometric parameters of high-speed railway tracks.

Risk Assessment Method for High-Speed Railway Track Based on Dynamically Weighted Acceleration

2021 ◽  
Vol 27 (4) ◽  
pp. 04021030
Author(s):  
Xiaohui Wang ◽  
Jianwei Yang ◽  
Jinhai Wang ◽  
Yanxue Wang ◽  
Fu Liu
Keyword(s):  
Risk Assessment ◽  
High Speed ◽  
Assessment Method ◽  
Railway Track ◽  
High Speed Railway ◽  
Risk Assessment Method

scholarly journals Application of Mastic Asphalt Waterproofing Layer in High-Speed Railway Track in Cold Regions

2018 ◽  
Vol 8 (5) ◽  
pp. 667 ◽  
Author(s):  
Song Liu ◽  
Jun Yang ◽  
Xianhua Chen ◽  
Guotao Yang ◽  
Degou Cai
Keyword(s):  
High Speed ◽  
Railway Track ◽  
High Speed Railway ◽  
Cold Regions ◽  
Mastic Asphalt

Nonlinear random seismic analysis of 3D high-speed railway track-bridge system based on OpenSEES

Structures ◽  
2020 ◽  
Vol 24 ◽  
pp. 87-98
Author(s):  
Haiyan Li ◽  
Zhiwu Yu ◽  
Jianfeng Mao ◽  
Lizhong Jiang
Keyword(s):  
High Speed ◽  
Seismic Analysis ◽  
Railway Track ◽  
High Speed Railway ◽  
Track Bridge ◽  
Bridge System

scholarly journals An Innovative Detection Method of High-Speed Railway Track Slab Supporting Block Plane Based on Point Cloud Data from 3D Scanning Technology

2019 ◽  
Vol 9 (16) ◽  
pp. 3345 ◽  
Author(s):  
Chen ◽  
Qin ◽  
Xia ◽  
Bao ◽  
Huang ◽  
...  
Keyword(s):  
Point Cloud ◽  
High Speed ◽  
Detection Method ◽  
Railway Track ◽  
Point Cloud Data ◽  
3D Scanner ◽  
High Speed Railway ◽  
Cloud Data ◽  
Plane Point ◽  
Track Slab

The dimension detection of high-speed railway track slabs is one of the most important tasks before the track slabs delivery. Based on the characteristics of a 3D scanner which can acquire a large amount of measurement data continuously and rapidly in a short time, this paper uses the integration of 3D scanner and the intelligent robot to detect the CRTSIII (China Railway Track System) track slab supporting block plane, then the dense and accurate supporting block plane point cloud data is obtained, and the point cloud data is registered with the established model. An improved Random Sample Consensus (RANSAC) plane fitting algorithm is also proposed to extract the data of supporting block plane point cloud in this paper. The detection method is verified and the quality analysis of the detection results is assessed by a lot of real point cloud data obtained on site. The results show that the method can meet the quality control of CRTSIII finished track slab and the detection standard. Compared with the traditional detection methods, the detection method proposed in this paper can complete the detection of a track slab in 7 min, which greatly improves the detection efficiency, and has better reliability. The method has wide application prospects in the field of railway component detection.

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