Tiedao Xuebao/Journal of the China Railway Society Pub Date : 2015-12-15 DOI: 10.3969/j.issn.1001-8360.2015.12.015

Wei Zhang, Jiangchao Wang, Xianmin Li, Cong Jiang, Yong-hong Niu

{"title":"Influence of Thermal-protective Coating on the Culvert in Deep Seasonally Frozen Region and Its Optimized Design","authors":"Wei Zhang, Jiangchao Wang, Xianmin Li, Cong Jiang, Yong-hong Niu","doi":"10.3969/j.issn.1001-8360.2015.12.015","DOIUrl":"https://doi.org/10.3969/j.issn.1001-8360.2015.12.015","url":null,"abstract":"In deep seasonally frozen region, the culvert changed the freezing process. The maximum depth of seasonal freezing in culvert foundation was about 2 times deeper than that in natural ground. In order to ease the situation, the measure of laying thermal-protective coating under the culvert is usually taken as a solution. In this paper, the advantages and disadvantages of three kinds of commonly used insulation materials were compared through the equivalent thickness conversion method. Based on the existing monitoring data of the culverts in Harbin to Dalian passenger dedicated line, a finite element model was established to simulate the temperature fields of the culverts with thermal-protective coating. To verify the effect of the thermal-protective coating, a numerical calculation was conducted respectively on different locations, modes and thickness of the thermal-protective coating to understand the influence of different conditions on the maximum frozen depth and to obtain the optimal laying scheme for culvert foundation. The results indicated that foam concrete is the ideal material for the thermal-protective coating, and the 38-cm-thick foam concrete should be laid on the top of the experimental culvert foundation as thermal-protective coating, which should be 10cm broader than the foundation. In this way, the maximum freezing depth under the culvert could be reduced, to meet the needs of construction in the cold region. © 2015, Science Press. All right reserved.","PeriodicalId":35766,"journal":{"name":"Tiedao Xuebao/Journal of the China Railway Society","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2015-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70068058","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Research on residual stress of multi-pass welding for KK end of high speed EMUs 高速动车组KK端多道次焊接残余应力研究

Tiedao Xuebao/Journal of the China Railway Society Pub Date : 2015-01-01 DOI: 10.3969/J.ISSN.1001-8361.2015.07.005

Siqun Ma, Huitang Jin, S. Xie, Y. Yuan, Wenzhong Zhao, P. Dong

引用次数: 1

Research on Beat-Less Control Strategy Based on Frequency-Domain Analysis 基于频域分析的无热控制策略研究

Tiedao Xuebao/Journal of the China Railway Society Pub Date : 2014-01-01 DOI: 10.1007/978-3-642-53778-3_13

Kan Dong, Li-jun Diao, Leiting Zhao, Yizhou Chen, Zhigang Liu

引用次数: 0

Transfer Volume Forecasting Method for the Metro in Networking Conditions 网络化条件下地铁转运量预测方法

Tiedao Xuebao/Journal of the China Railway Society Pub Date : 2013-01-01 DOI: 10.3969/J.ISSN.1001-8360.2013.11.001

Yongsheng Zhang, E. Yao, Hongna Dai

{"title":"Transfer Volume Forecasting Method for the Metro in Networking Conditions","authors":"Yongsheng Zhang, E. Yao, Hongna Dai","doi":"10.3969/J.ISSN.1001-8360.2013.11.001","DOIUrl":"https://doi.org/10.3969/J.ISSN.1001-8360.2013.11.001","url":null,"abstract":"Transfer volume forecasting is the basis of transfer station design, passenger flow organization and emergency scheme formulation. Along with rapid development of Metro networking operation in recent years, transfer volume forecasting for the Metro system in networking conditions becomes an important issue to be solved. In this paper, the transfer volume forecasting method was proposed on the basis of route choice analysis and passenger flow distribution. Taking into consideration the variables of level of service such as the ride time, number of transfers, transfer time and congestion degree and introducing in the index of angular cost value to describe the influence of network structures and route directions on route choices, the route choice model was established to analyze passengers' route choice preferences. Through equivalent ride time conversion of the above influential factors and analysis on the degree of passenger tolerance to travel time, the effective route set of all OD (Origin-Destination) pairs was constructed with the K-shortest paths algorithm. Then stochastic assignment was carried out with the MSA (method of successive averages) algorithm under constraint of the first and last train and the statistical method was put forward to calculate the transfer volumes of all transfer stations within a specified time interval. Finally, the transfer volumes of the Beijing Subway were estimated with the proposed transfer volume forecasting method. The results show that the angular cost value significantly influences the route choice behavior and the proposed method can provide good reliability and accuracy.","PeriodicalId":35766,"journal":{"name":"Tiedao Xuebao/Journal of the China Railway Society","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2013-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70068047","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 7

The Pantograph-catenary Arc Test system for High-speed Railways 高速铁路受电弓-接触网电弧试验系统

Tiedao Xuebao/Journal of the China Railway Society Pub Date : 2012-04-01 DOI: 10.3969/J.ISSN.1001-8360.2012.04.004

Wang Wangang, Wu Guangning, Gao Guoqiang, Wang Bo, Cui Yi, Liu Donglai

引用次数: 12

Model and algorithm for track allocation at large-scale railway passenger stations 大型铁路客运站轨道分配模型与算法

Tiedao Xuebao/Journal of the China Railway Society Pub Date : 2010-01-01 DOI: 10.3969/J.ISSN.1001-8360.2010.02.002

W. Jia, B. Mao, T. Ho, Hd Liu

引用次数: 2

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