Numerical Analysis to Impact of Different Heights for Subgrade Connecting in High-Speed Railway

2010 ◽  
Vol 168-170 ◽  
pp. 1256-1259
Author(s):  
Jian Yi Yuan ◽  
Ya Yu Lv
Keyword(s):  
Numerical Calculation ◽  
Numerical Analysis ◽  
High Speed ◽  
Vertical Direction ◽  
Important Research ◽  
High Speed Railway ◽  
Construction Engineering ◽  
Railway Construction ◽  
Safety Operation ◽  
Surface Increase

Subgrade connecting has become an important research project in high-speed railway construction engineering. Combining the hub project of Hefei railway, numerical calculation was executed with different subgrade heights to existing line’s safety operation and subgrade stability by FLAC software. It shows that deformations in the vertical direction of the connection between the new subgrade and the old and the old subgrade surface increase following the increment of subgrade height, and the velocity of deformation increment also aggrandize. Reduction of subgrade height is beneficial to trains safety on existing line and subgrade integration property. It will be instructive to control differentia deformation for the connecting subgrade projects in high-speed railway.

Numerical Analysis to Influence of Different Roller Loads for Low Subgrade Connecting

2012 ◽  
Vol 166-169 ◽  
pp. 1226-1229
Author(s):  
Jian Yi Yuan ◽  
Yue Ya Tu ◽  
Tao Cheng ◽  
Ding Bang Zhang ◽  
Zhen Hua Wu ◽  
...  
Keyword(s):  
Surface Layer ◽  
Numerical Analysis ◽  
Linear Relationship ◽  
High Speed ◽  
Vertical Direction ◽  
High Speed Railway ◽  
Key Points ◽  
Numerical Software ◽  
Non Linear ◽  
Minimum Deformation

In order to analyze impact of roller loads applying in subgrade connecting, numerical software had been executed to calculate deformation caused by three types of roller loads to 6m subgrade. In this analysis, surface layer of the old subgrade, slope toe point and connecting point had been chosen as key points to study deformation under different construction processes. The results show that the displacement in the vertical direction of point A and point B increases with the roller load's increasing. Deformation of key points has the non-linear relationship with construction steps. According to the minimum deformation, the first scheme is chosen which is beneficial to the train’s safty and stability of whole subgrade. It will be instructive to control differentia deformation for the connecting subgrade projects in high-speed railway

Back Analysis of Parameters and Settlement Prediction of Chengdu Clay Ground Considering Its Creep Behavior

2013 ◽  
Vol 671-674 ◽  
pp. 23-26 ◽  
Author(s):  
Yan Feng ◽  
Jian Fang Li
Keyword(s):  
High Speed ◽  
Back Analysis ◽  
Elastic Parameters ◽  
High Speed Railway ◽  
Settlement Prediction ◽  
Burgers Model ◽  
Railway Construction ◽  
Clay Ground ◽  
Railway Construction Project

Chengdu - Mianyang – Leshan (C-M-L for short) high speed railway in Chengdu section is located in the ground of weathered Mud rock overlying deep Chengdu clay area. Based on Chengdu clay ground of in high-speed railway construction project of CML, this article introduced the Burgers model to establish the objective function to analysis rheological constitutive model. The visco-elastic parameters of Burgers model are determined by back analysis of field monitoring data. By the method of iterative back analysis by layer of visco-elastic parameters, based on measured result, predicted the late settlement, and comparison with the follow-up observations records to verify the Burgers model.

Design and Construction Technologies

2010 ◽  
Author(s):  
Cailan Wu ◽  
Weixiao Cui ◽  
Chengzhi Zhang ◽  
Huaijian Li ◽  
Hongliang Yan
Keyword(s):  
High Speed ◽  
Actual Situation ◽  
Technical Standard ◽  
High Speed Railway ◽  
Deformation Control ◽  
Slab Track ◽  
Railway Construction ◽  
Scheme Optimization ◽  
Key Technologies ◽  
Design And Construction

Combining with the actual situation of China’s railway construction, this paper introduces the key technologies of design and construction of high-speed railway, such as the scheme optimization of subgrade, bridge and tunnel, technical standard, deformation control, advance geology forecast and settlement observation, etc. It also discusses the design and construction problems on the slab layout and interface of CRTS II slab track on bridge section, switch area, subgrade area and the transition with different track structures.

Impact of organization on occupational injury risk: Evidence from high-speed railway construction

2011 ◽  
Vol 54 (6) ◽  
pp. 428-437 ◽  
Author(s):  
Antonella Bena ◽  
Paola Berchialla ◽  
Maria Luisa Debernardi ◽  
Osvaldo Pasqualini ◽  
Elena Farina ◽  
...  
Keyword(s):  
High Speed ◽  
Injury Risk ◽  
Occupational Injury ◽  
High Speed Railway ◽  
Railway Construction

Development of electro-hydraulic proportion control system of track-laying machinery for high speed railway construction

Mechatronics ◽  
2016 ◽  
Vol 40 ◽  
pp. 167-177 ◽  
Author(s):  
Yunhua Li ◽  
Wei Liu ◽  
Liman Yang ◽  
Zhanling Ji ◽  
Yulong Zhao ◽  
...  
Keyword(s):  
Control System ◽  
High Speed ◽  
High Speed Railway ◽  
Railway Construction

A Method for Predicting Probabilistic Resource Conflicts between Trains

2014 ◽  
Vol 641-642 ◽  
pp. 745-752
Author(s):  
Jian Bo Zheng ◽  
Jing Wen Guo
Keyword(s):  
Travel Time ◽  
High Speed ◽  
Influence Factors ◽  
Travel Time Reliability ◽  
High Speed Railway ◽  
Resource Conflicts ◽  
Railway Construction ◽  
Train Dispatching ◽  
Conflict Prediction ◽  
Reliable Basis

The development of high-speed railway construction and operation greatly shorten people's travel time, however, the demand of people on travel time reliability becomes more and more prominent, so train dispatching plans are becoming more and more important. This paper defines probabilistic conflicts between trains, analyses probabilistic conflict influence factors and comes up with a method for predicting probabilistic resource conflicts between trains. The method aims to improve the accuracy of train conflict prediction, provide more reliable basis to solve train conflicts and develop more efficient train dispatching plans.

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