Journal of Traffic and Transportation Engineering-English Edition最新文献_第2页

Investigation on the low temperature rheological properties of polymer modified asphalt 聚合物改性沥青低温流变性能研究

IF 7.4 2区工程技术

Journal of Traffic and Transportation Engineering-English Edition Pub Date : 2025-04-01 DOI: 10.1016/j.jtte.2023.02.010

Zhen Fu , Ruimeng Song , Wen Qin , Ke Shi , Feng Ma , Jiarong Li , Chao Li

{"title":"Investigation on the low temperature rheological properties of polymer modified asphalt","authors":"Zhen Fu , Ruimeng Song , Wen Qin , Ke Shi , Feng Ma , Jiarong Li , Chao Li","doi":"10.1016/j.jtte.2023.02.010","DOIUrl":"10.1016/j.jtte.2023.02.010","url":null,"abstract":"<div><div>Traditional pavement is prone to cracks, and other distresses in cold regions. In this case, asphalt modification is a common technique used to improve the performance of asphalt. This study attempts to compare the low temperature properties of three modified asphalts. For this purpose, the addition of crumb rubber (CR), modified crumb rubber (MCR), and styrene-butadiene-styrene (SBS) to the base asphalt, respectively, and CR modified asphalt, MCR modified asphalt, and SBS modified asphalt is firstly prepared. Then, the asphalt specimens are subjected to a thin film oven test (TFOT) and pressurized aging vessel (PAV) test. The bending beam rheometer (BBR) test is conducted to compare the rheology characteristics and anti-aging performance of three modified asphalts. Furthermore, the low temperature performance of three modified asphalts is compared by three approaches based on the performance grade (PG), critical low temperature, and Burgers model. The BBR results show that the CR modified asphalt has the best low temperature performance. However, the CR modified asphalt show poor aging resistance, SBS modified asphalt, and MCR modified asphalt have better aging resistance. In terms of the Burgers model, it is established to analyze the resistance to low temperature cracking of four asphalts from the perspective of viscoelastic properties. Different viscoelastic parameters indicate that the low temperature performance of CR modified asphalt is superior to the other asphalts, which is consistent with the result of the critical low temperatures.</div></div>","PeriodicalId":47239,"journal":{"name":"Journal of Traffic and Transportation Engineering-English Edition","volume":"12 2","pages":"Pages 319-330"},"PeriodicalIF":7.4,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143887006","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

In-depth investigation of contributing factors of fatal/severe-injury crashes at highway merging areas using machine learning classification methods 使用机器学习分类方法对高速公路合并区域致命/严重伤害事故的影响因素进行深入调查

IF 7.4 2区工程技术

Journal of Traffic and Transportation Engineering-English Edition Pub Date : 2025-04-01 DOI: 10.1016/j.jtte.2023.06.007

Nischal Bhattarai , Ciyun Lin , Yibin Zhang , Hongchao Liu

{"title":"In-depth investigation of contributing factors of fatal/severe-injury crashes at highway merging areas using machine learning classification methods","authors":"Nischal Bhattarai , Ciyun Lin , Yibin Zhang , Hongchao Liu","doi":"10.1016/j.jtte.2023.06.007","DOIUrl":"10.1016/j.jtte.2023.06.007","url":null,"abstract":"<div><div>Highway on-ramp merging locations are vulnerable to traffic collisions inflicting fatal or serious injuries to drivers. Although numerous studies have uncovered the major contributing factors to crashes at on-ramp merging areas, none of these studies have focused on fatal/severe-injury crashes. This paper aims to provide an in-depth and systematic investigation on critical contributing factors of the high-severity crashes at highway merging areas. As part of the analysis, support vector machines (SVM) and random forest (RF) models were developed for a 10-year data set of crashes at more than 250 merging locations in Texas, United States, using 23 different crash attributes describing each incident to predict high-severity crashes. A sensitivity analysis was conducted to quantify the marginal effects of each contributing factor. The results indicate that there is an increased likelihood of fatal/severe-injury crashes when the number of highway lanes is high, and the number of lanes on the frontage roads/connector roads is low (<4). Likewise, presence of heavy vehicles seems to affect the occurrence of fatal injury crashes at merging areas. Additionally, longer ramp lengths, presence of auxiliary lanes, and the proximity of exit ramps are found to increase the likelihood of high severity crashes. These findings, either new or consistent with previous studies are helpful in enriching the literature of on-ramp related highway safety studies.</div></div>","PeriodicalId":47239,"journal":{"name":"Journal of Traffic and Transportation Engineering-English Edition","volume":"12 2","pages":"Pages 434-446"},"PeriodicalIF":7.4,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143886807","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Modification of bitumen with polyether-based polyurethanes containing different hard segments 用含有不同硬段的聚醚基聚氨酯改性沥青

IF 7.4 2区工程技术

Journal of Traffic and Transportation Engineering-English Edition Pub Date : 2025-04-01 DOI: 10.1016/j.jtte.2023.01.006

Zengping Zhang , Hao Liu , Youxin Zhu , Liqi Chen , Jia Sun , Li Wang , Ting Huang

{"title":"Modification of bitumen with polyether-based polyurethanes containing different hard segments","authors":"Zengping Zhang , Hao Liu , Youxin Zhu , Liqi Chen , Jia Sun , Li Wang , Ting Huang","doi":"10.1016/j.jtte.2023.01.006","DOIUrl":"10.1016/j.jtte.2023.01.006","url":null,"abstract":"<div><div>To expand the application of polyurethane (PU) modified bitumen, it is necessary to understand the influence of PU raw materials on PU modified bitumen systematically. Three polyether-based polyurethanes were used to modify the unmodified bitumen, synthesised from toluene diisocyanate (TDI), diphenylmethane diisocyanate (MDI), and polyaryl polyisocyanate (PAPI) by reaction with polytetrahydrofuran diol (PTMEG) respectively. And the performance of polyether-based PU modified bitumen was investigated at various contents of isocyanates. Firstly, the modification mechanism of PU modified bitumen binders was analysed by Fourier transform infrared spectroscopy (FTIR). Then, the high and low temperature properties and resistance to permanent deformation of modified bitumen binders were investigated through dynamic shear rheometer (DSR) test, bending beam rheometer (BBR) test and multiple stress creep recovery (MSCR) test. Finally, the microstructure and molecular movement were analyzed by fluorescence microscopy (FM), atomic force microscopy (AFM) and differential scanning calorimetry (DSC). As the results show, there are significant differences in the molecular structure, cross-linking and hydrogen bonding of polyurethane modifiers synthesised from different isocyanates, which then affect the interaction between polyurethane molecules and bitumen molecules and result in different modification effects on bitumen. Concerning high-temperature properties and storage stability, PU synthesised by PAPI is the best solution for improving bitumen. PU synthesised by TDI offers the best improvement in low temperature performance. It is worth noting that the PU synthesised by MDI provides a more balanced improvement in high and low temperature performances. This study provides guidance for the development of PU modified bitumen.</div></div>","PeriodicalId":47239,"journal":{"name":"Journal of Traffic and Transportation Engineering-English Edition","volume":"12 2","pages":"Pages 344-360"},"PeriodicalIF":7.4,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143886808","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

An intelligent bridge multi-dimension deflection IoT monitoring system based on laser datum and imaging 基于激光基准和成像的智能桥梁多维挠度物联网监测系统

IF 7.4 2区工程技术

Journal of Traffic and Transportation Engineering-English Edition Pub Date : 2025-04-01 DOI: 10.1016/j.jtte.2023.06.006

Dan Zhao , Huifeng Wang , Hao Du , Haoyi Cheng , Lu Peng , Yaru Liang , He Huang , Yunmeng Li

{"title":"An intelligent bridge multi-dimension deflection IoT monitoring system based on laser datum and imaging","authors":"Dan Zhao , Huifeng Wang , Hao Du , Haoyi Cheng , Lu Peng , Yaru Liang , He Huang , Yunmeng Li","doi":"10.1016/j.jtte.2023.06.006","DOIUrl":"10.1016/j.jtte.2023.06.006","url":null,"abstract":"<div><div>Aiming at the all-weather automatic monitoring of bridge structure health monitoring, an embedded bridge multi-dimensional (horizontal and vertical) deflection monitoring system based on dual laser references is proposed. The controller turns on the laser reference transmitter through instructions to emit the laser reference. The intelligent target system located in the middle of the span will calculate the multi-dimensional deflection and deformation information of the bridge structure according to the laser spot projected on the diffuse optical target, and pass this information through the wireless network communication unit transmits to the cloud platform to realize real-time monitoring of the bridge structure status and other parameters. Through the laboratory platform, it is found that the measurement error of this method is less than 300 μm, and the data update rate is less than 66 ms, which meets the requirements of bridge structural health monitoring. This method solves the problem of low efficiency of artificial bridge deflection monitoring, realizes all-weather online real-time monitoring of bridge deflection detection, and ensures the accuracy and efficiency of the measurement system. Applying this monitoring technology not only significantly improves the efficiency and accuracy of bridge structural health monitoring but also plays a crucial role in ensuring safe bridge operations, extending the service life of bridges, and reducing maintenance costs.</div></div>","PeriodicalId":47239,"journal":{"name":"Journal of Traffic and Transportation Engineering-English Edition","volume":"12 2","pages":"Pages 269-287"},"PeriodicalIF":7.4,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143887003","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Long tunnel group driving fatigue detection model based on XGBoost algorithm 基于XGBoost算法的长隧道群行驶疲劳检测模型

IF 7.4 2区工程技术

Journal of Traffic and Transportation Engineering-English Edition Pub Date : 2025-02-01 DOI: 10.1016/j.jtte.2023.02.008

Huazhi Yuan , Kun Zhao , Ying Yan , Li Wan , Zhending Tian , Xinqiang Chen

{"title":"Long tunnel group driving fatigue detection model based on XGBoost algorithm","authors":"Huazhi Yuan , Kun Zhao , Ying Yan , Li Wan , Zhending Tian , Xinqiang Chen","doi":"10.1016/j.jtte.2023.02.008","DOIUrl":"10.1016/j.jtte.2023.02.008","url":null,"abstract":"<div><div>Driving fatigue is one of the important causes of accidents in tunnel (group) sections. In this paper, in order to effectively identify the driving fatigue of tunnel (group) drivers, an eye tracker and other instruments were used to conduct real vehicle tests on long tunnel (group) expressways and thus obtain the eye movement, driving duration, and Karolinska sleepiness scale (KSS) data of 30 drivers. The impacts of the tunnel and non-tunnel sections on drivers were compared, and the relationship between blink indexes, such as the blink frequency, blink duration, mean value of blink duration, driving duration, and driving fatigue, was studied. A paired <em>t</em>-test and a Spearman correlation test were performed to select the indexes that can effectively characterize the tunnel driving fatigue. A driving fatigue detection model was then developed based on the XGBoost algorithm. The obtained results show that the blink frequency, total blink duration, and mean value of blink duration gradually increase with the deepening of driving fatigue, and the mean value of blink duration is the most sensitive in the tunnel environment. In addition, a significant correlation exists between the driving duration index and driving fatigue, which can provide a reference for improving the tunnel safety. Using the mean value of blink duration and driving duration as the characteristic indexes, the accuracy of the driving fatigue detection model based on the XGBoost algorithm reaches 98%. The cumulative and continuous tunnel proportion effectively estimates the driving fatigue state in a long tunnel (group) environment.</div></div>","PeriodicalId":47239,"journal":{"name":"Journal of Traffic and Transportation Engineering-English Edition","volume":"12 1","pages":"Pages 167-179"},"PeriodicalIF":7.4,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143479342","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Using piezoelectric technology to harvest energy from pavement: A review 利用压电技术从路面获取能量：综述

IF 7.4 2区工程技术

Journal of Traffic and Transportation Engineering-English Edition Pub Date : 2025-02-01 DOI: 10.1016/j.jtte.2024.11.002

Keliang Mou , Xiaoping Ji , Jie Liu , Haoyu Zhou , Haochen Tian , Xiaojuan Li , Honghui Liu

{"title":"Using piezoelectric technology to harvest energy from pavement: A review","authors":"Keliang Mou , Xiaoping Ji , Jie Liu , Haoyu Zhou , Haochen Tian , Xiaojuan Li , Honghui Liu","doi":"10.1016/j.jtte.2024.11.002","DOIUrl":"10.1016/j.jtte.2024.11.002","url":null,"abstract":"<div><div>A key point in building a contemporary energy system is the search for sustainable and green energy. Many green energy sources exist in the road or pavement domain, such as solar, thermal, wind, and mechanical energy, etc. Under the repeated vehicle loads, stresses and strains are generated in the pavement, which can generate substantial mechanical energy. In recent two decades, there has been a growing scholarly preference for utilizing the piezoelectric effect to convert mechanical energy from pavement into electricity to supply low-power transportation facilities, pavement sensors, etc. This paper provides an in-depth review of state-of-the-art advances in road piezoelectric energy harvesters. The basic principle of piezoelectric energy harvesting and common piezoelectric materials were briefly introduced. The piezoelectric energy harvesters suitable for roads are thoroughly reviewed from five perspectives: structure, finite element analyses, protective packaging, management circuit, and application. Finally, the challenges faced by piezoelectric energy harvesters for pavements were summarized, and the potential research directions were also proposed. This review serves as a valuable reference for advancing road piezoelectric harvesting technology development.</div></div>","PeriodicalId":47239,"journal":{"name":"Journal of Traffic and Transportation Engineering-English Edition","volume":"12 1","pages":"Pages 68-86"},"PeriodicalIF":7.4,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143479338","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Prediction of remaining parking spaces based on EMD-LSTM-BiLSTM neural network 基于EMD-LSTM-BiLSTM神经网络的剩余车位预测

IF 7.4 2区工程技术

Journal of Traffic and Transportation Engineering-English Edition Pub Date : 2025-02-01 DOI: 10.1016/j.jtte.2023.01.004

Changxi Ma, Xiaoting Huang, Ke Wang, Yongpeng Zhao

{"title":"Prediction of remaining parking spaces based on EMD-LSTM-BiLSTM neural network","authors":"Changxi Ma, Xiaoting Huang, Ke Wang, Yongpeng Zhao","doi":"10.1016/j.jtte.2023.01.004","DOIUrl":"10.1016/j.jtte.2023.01.004","url":null,"abstract":"<div><div>The traffic congestion caused by the mismatch between the demand of car owners and the supply of parking spaces has become one of the severe traffic problems in various places. It is important to predict the remaining parking space which can not only help the driver to plan their trips reasonably but also reduce the pressure on urban road traffic. To reduce the stochastic fluctuations of complex data and improve the predictability of parking spaces, a hybrid prediction model EMD-LSTM-BiLSTM is proposed, which is combined the adaptive ability of empirical mode decomposition (EMD) to process time series data and the advantage of long short-term memory network (LSTM) and bidirectional long short-term memory network (BiLSTM) to solve long-range dependencies. First, the EMD algorithm is employed to decompose the components of different scales in the time series and generate a series of mode functions with the same characteristic scale. Next, the construction, training, and prediction of the LSTM-BiLSTM neural network are completed in the deep learning framework of Keras. BiLSTM was built for proposing the bi-directional temporal features of the sequences, and LSTM was responsible for learning the output features, which effectively avoids large prediction errors. Finally, the performance of the model is verified by the actual parking data sets of different parking lots for parking space prediction. The proposed hybrid model is compared with a variety of current mainstream deep learning algorithms, and the effectiveness of the EMD-LSTM-BiLSTM method is validated. The results may provide some potential insights for parking prediction.</div></div>","PeriodicalId":47239,"journal":{"name":"Journal of Traffic and Transportation Engineering-English Edition","volume":"12 1","pages":"Pages 201-213"},"PeriodicalIF":7.4,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143479358","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Risk diagnosis model for high-speed rail safety operation in big-data environment 大数据环境下高铁安全运行风险诊断模型

IF 7.4 2区工程技术

Journal of Traffic and Transportation Engineering-English Edition Pub Date : 2025-02-01 DOI: 10.1016/j.jtte.2023.03.003

Qizhou Hu, Xin Guan, Xiaoyu Wu

{"title":"Risk diagnosis model for high-speed rail safety operation in big-data environment","authors":"Qizhou Hu, Xin Guan, Xiaoyu Wu","doi":"10.1016/j.jtte.2023.03.003","DOIUrl":"10.1016/j.jtte.2023.03.003","url":null,"abstract":"<div><div>Aiming at the risk issue of high-speed rail (HSR) safety operation, big data technology and uncertain mathematical method are adopted to study it. Firstly, from the perspective of system science, the risk diagnosis mode of HSR safety operation is put forward, which mainly includes the operation environment diagnosis mode based on multivariate product, high-speed train diagnosis mode based on failure influence, staff diagnosis mode based on management conditions, track diagnosis mode based on probability safety, etc. And based on comprehensive analysis, the conventional risk diagnosis index system is constructed. Then the dynamic diagnosis index system based on principal component analysis is proposed, and the risk diagnosis model of HSR safety operation is established. The diagnosis model can quickly evaluate the operation situations of HSR, and the diagnosis results are conducive to grasping the situation of risk events quickly and accurately, so as to meet the timeliness requirements of emergency decision-making. Finally, to verify the effectiveness of this new model, the Beijing–Shanghai HSR is selected as a case study. The analysis results show that the diagnosis model can quickly diagnose the safety operation situation of HSR, simplify the evaluation process and improve the efficiency of the comprehensive evaluation of emergencies.</div></div>","PeriodicalId":47239,"journal":{"name":"Journal of Traffic and Transportation Engineering-English Edition","volume":"12 1","pages":"Pages 12-22"},"PeriodicalIF":7.4,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143479334","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Bayesian spatial modeling for speeding likelihood using floating car trajectories 基于浮动汽车轨迹的超速可能性贝叶斯空间建模

IF 7.4 2区工程技术

Journal of Traffic and Transportation Engineering-English Edition Pub Date : 2025-02-01 DOI: 10.1016/j.jtte.2023.07.013

Haiyue Liu , Chaozhe Jiang , Chuanyun Fu , Yue Zhou , Chenyang Zhang , Zhiqiang Sun

{"title":"Bayesian spatial modeling for speeding likelihood using floating car trajectories","authors":"Haiyue Liu , Chaozhe Jiang , Chuanyun Fu , Yue Zhou , Chenyang Zhang , Zhiqiang Sun","doi":"10.1016/j.jtte.2023.07.013","DOIUrl":"10.1016/j.jtte.2023.07.013","url":null,"abstract":"<div><div>Speeding likelihood is usually used to measure drivers' propensity of committing speeding. Albeit some studies have analyzed speeding likelihood, most of them are inadequate in considering spatial effects when analyzing speeding behaviors on urban road networks. This study aims to fill this knowledge gap by modeling speeding likelihood with spatial models and then evaluate the influence of contributing factors. The percent of speeding observations (PSO) is adopted to represent the speeding likelihood. The speeding behaviors and PSO of each floating car (i.e., taxi) are extracted from the GPS trajectories in Chengdu, China. PSO is modeled by several Bayesian beta general linear models with spatial effects, namely the beta model, beta logit-normal model, beta intrinsic conditional autoregressive (ICAR) model, beta Besag-York-Mollié (BYM) model, and beta BYM2 model. Results show that the beta BYM2 model performs better than other models in terms of data-fitting. According to the estimates from the beta BYM2, spatial correlation is the main reason for the model variability. The roads with more lanes and roads linked by elevated roads are found to increase the speeding likelihood, while higher speed limits, intersection density, traffic congestion, and roadside parking are associated with lower speeding likelihood. These findings provide valuable insights for designing effective anti-speeding countermeasures on urban road networks.</div></div>","PeriodicalId":47239,"journal":{"name":"Journal of Traffic and Transportation Engineering-English Edition","volume":"12 1","pages":"Pages 139-150"},"PeriodicalIF":7.4,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143479864","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A comparison on the effects of coal fines and sand fouling on the shear behaviors of railway ballast using large scale direct shear tests 采用大型直剪试验比较了煤粉和砂土污染对铁路道砟剪切特性的影响

IF 7.4 2区工程技术

Journal of Traffic and Transportation Engineering-English Edition Pub Date : 2025-02-01 DOI: 10.1016/j.jtte.2022.09.003

Xu Zhang , Shunying Ji , Yang Feng , Yongjun Li , Chunfa Zhao

{"title":"A comparison on the effects of coal fines and sand fouling on the shear behaviors of railway ballast using large scale direct shear tests","authors":"Xu Zhang , Shunying Ji , Yang Feng , Yongjun Li , Chunfa Zhao","doi":"10.1016/j.jtte.2022.09.003","DOIUrl":"10.1016/j.jtte.2022.09.003","url":null,"abstract":"<div><div>Railway ballast is easily contaminated by different fouling material and the fouled ballast always causes the deterioration of railway track. Many previous studies focused on the effect of a certain kind of fouling material on ballast performance, but few studies compared the influence of different fouling material. This paper presents a series of direct shear tests on the clean ballast and the fouled ballast mixed with coal fines or sand to understand the effects of different fouling material. A unified empirical model is proposed to well capture the shear stress-displacement responses of the clean and fouled ballast. Empirical equations are also obtained to characterize the variation of the nonlinear shear strength envelope of the fouled ballast with the fouling content. Based on these equations, a simple method is proposed to predict the shear strength of the fouled ballast using the shear test results of clean ballast. The measured results demonstrate significant differences between the effects of coal fines and sand on the shear behaviors of ballast, to which particular attention should be paid in order to take targeted maintenance measures for the fouled ballast. The mechanisms for the different effects of coal fines and sand are also analyzed to understand the roles that various fouling material plays in the fouled ballast.</div></div>","PeriodicalId":47239,"journal":{"name":"Journal of Traffic and Transportation Engineering-English Edition","volume":"12 1","pages":"Pages 52-67"},"PeriodicalIF":7.4,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143479337","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0