“轮子上的城市”还是“轨道上的城市”？

本文以欧洲城市轨道交通建设为研究对象,比较了“轮子上的城市”与“轨道上的城市”两种不同的城市交通发展模式,并通过具体的现象分析了中欧城市交通发展思想的差异,以促进对欧洲城市交通模式与景观的更加深刻的理解。     

城际铁路站点周边土地利用策略研究——以武汉至咸宁城际铁路贺胜桥站为例

随着城市和城市群的快速发展以及轨道交通技术的进步,中国主要大城市先后开始了城际铁路的建设。这一大型基础设施的建设加快了城市群之间的交流与联系,同时也带动了沿线站点地区的城市发展。该文结合武汉至咸宁城际铁路贺胜桥站的实际案例,通过比较、借鉴国内外各类型铁路站点地区的开发经验,研究相关理论,对功能定位、开发模式、运营管理等方面进行研究,提出对城际铁路站点地区土地开发利用策略建议。目的是优化资源配置,提升站点地区的地位,促进城市空间的优化和提升城市竞争力。     

以交通枢纽为核心的土地综合利用对旧城改造的启示——以宜宾市火车站站前广场城市设计为例

随着我国大规模的城际轨道、城市轨道、高速铁路建设热潮的来临,如何实现交通基础设施布局与城镇空间拓展的协调发展是一个值得重视和研究的课题.本文探讨在城市旧城改造过程中,基于TOD模式下的交通枢纽地块的土地综合利用.     

上海虹桥枢纽超大型轨道交通综合体

由高铁站房、磁浮车站、地铁车站形成的高度集成的超大型城市轨道交通综合体,结合航空机场、长途车站等,形成了在国内外均较为少见的上海虹桥综合交通枢纽。枢纽内整体建筑风格协调统一,“平直、方正、厚重”。旅客流线顺畅、换乘便捷、站点衔接合理,在充分发挥大运量功能的同时,力争做到工程建设用地少、整体运营成本低。     

促进大型综合交通枢纽片区活力策略研究

21世纪铁路交通不断完善和提速,高铁和地铁应运而生,大型综合交通枢纽（以下简称“枢纽”）的建设和片区规划提上日程。如何利用商业、文化、娱乐等综合设施促进其区域活力,国内外实践值得我们总结其经验,本文进行针对性研究并提出策略。     

大城市市郊轨道交通线路规划研究——以宁句轨道交通为例

阐述了市郊轨道交通的功能特征及其敷设方式、车站设置、运营组织和行车速度等技术特征.基于宁句综合交通整体出行时耗的分析,论证了宁句轨道交通的功能定位.提出了宁旬轨道交通的发展要能引导汤山-黄梅-句容一体化空间结构的形成.针对宁句轨道跨行政区域的特点以及既有相关规划基础,为了提高规划方案的应变性与可行性,在明确了线路规划研...     

城市轨道交通地下车站接驳空间与周边建筑结合模式分析研究

分析城市轨道交通地下车站未结合周边建筑的形式、带来的问题,在此基础上提出城市轨道交通地下车站接驳空间与周边建筑的结合概念。系统地介绍了三种车站接驳空间与周边建筑结合的主要模式,分别从空间组织、功能组织、交通组织三个方面剖析了不同结合模式,并结合国内外具体的案例印证了这三个方面的主要内容。     

The Integration of Air and Rail Technologies: Shanghai's Hongqiao Integrated Transport Hub

This paper examines the different approaches to integrating air and rail technologies and their services at the Shanghai Hongqiao Integrated Transport Hub (“the Hongqiao Hub”) in China. Even though the Hongqiao Hub has the advantage of having both an airport and a railway station located at the same place, its level of air-rail integration remains at a low or moderate level. By analyzing existing air and rail services and potential travel demands, this paper recommends further streamlining the relationships among the Shanghai Airport Authority, the Shanghai Railway Bureau, and airline companies by fostering air-rail integration through the improvement of joint ticketing and code-sharing, direct luggage transfer, the provision of the fast and convenient connection from the Hongqiao International Airport to the Pudong International Airport, and air-rail linkage service area expansion.     

Combining Latent Class Models and GIS Models for Integrated Transport and Land Use Planning – A Case Study Application

This paper applies and combines Latent Class discrete choice models and GIS models to analyse travel and residential location choice behaviour in a metropolitan rail corridor. The Latent Class models reveal the factors influencing residents’ choices and behaviour. The GIS model indicates future travel demand needs and patterns. The combined model demonstrates the complex relationships between travel behaviour, housing preference, socio-demographic and environmental factors and suggests market segmentation for potential travel and housing demands. It provides a case study application of an advanced tool for policy makers in creating efficient integrated transport and land use plans.     

Cities,regions and the decline of transport costs

The theoretical framework of urban and regional economics is built on transportation costs for manufactured goods. But over the twentieth century, the costs of moving these goods have declined by over 90% in real terms, and there is little reason to doubt that this decline will continue. Moreover, technological change has eliminated the importance of fixed infrastructure transport (rail and water) that played a critical role in creating natural urban centres. In this article, we document this decline and explore several simple implications of a world where it is essentially free to move goods, but expensive to move people. We find empirical support for these implications.JEL Classification: R12, R14, R23, R41, J30Glaeser thanks the National Science Foundation, the Taubman Center, and the Rappaport Institute for support and Jesse Shapiro for providing tremendous assistance. Kohlhase thanks Jia-Huey Ling and Anuja Krishnan for helpful research assistance.     

Severe rail wear detection with rail running band images

Rail wear occurs continuously owing to the rolling contact load of trains and is fundamental for railway operational safety. A point-based manual rail wear inspection cannot satisfy the increasing demand for rapid, low-cost, and continuous monitoring. This paper proposes a depth-plus-region fusion network for detecting rail wear on a running band, which is a collection of wheel–rail interaction traces. The following steps are involved in the proposed method. (i) A depth map estimated by a modified MiDaS model is utilized as guidance for exploiting the depth information of the running band for rail wear detection. (ii) The running band of a rail is segmented and extracted from images using an improved mask region-based convolutional neural network that uses the scale and ratio information to perform instance segmentation of the running band images. (iii) A two-channel attention–fusion network that classifies rail wear is constructed. In this study, we collected real-world running band images and rail wear-related data to validate our approach using a high-accuracy rail-profile measurement tool. The case-study results demonstrated that the proposed method can rapidly and accurately detect rail wear under different ambient light conditions. Moreover, the recall rate of severe wear detection was 84.21%.     

城市轨道交通初始线路客流特征分析

建设轨道交通系统是缓解城市交通压力的有效途径之一,我国正处在快速轨道交通建设时期,很多城市迎来了首条轨道交通线路。为了给初始建设轨道线路的城市规划和管理者提供参考,本文研究了国内几个城市初始轨道线路开通后的客流特征,发现它们在开通初期客流增长迅速,在相交线路开通后,客流增长明显;轨道交通乘客的出行目的以通勤为主,步行和公交是与轨道换乘的主要交通方式;运行良好的轨道交通能提高公共交通系统的吸引力。相关结论可作为轨道线路规划、管理的参考依据。     

MQ系列龙门吊啃轨问题分析

对MQ系列龙门吊啃轨问题进行了阐述,从轨道及龙门吊组成的各要素入手对啃轨现象进行了分析,指出要处理龙门吊啃轨问题最好的方法是在安装过程中注意细节严加控制,从而有效解决了啃轨问题,保障龙门吊安全运行。     

重庆城市轨道交通管理机制探讨

轨道交通管理机制的建立是保证轨道交通顺利建设的需要。轨道交通的规划、建设涉及到政府的规划部门、建设行政主管部门、土地部门的权利配置,要想分清各相关部门的职责所在,必须建立一套完善的管理机制。本文就重庆市轨道交通管理机制的建立提出笔者的看法供同行参考。     

框支撑幕墙横杆扭转倾覆的分析及计算

本文介绍了杆件抗扭强度条件和刚度条件的控制计算方法,并分别对开闭口型材断面进行抗弯承我对比,进而详细分析了杆件的实际受力状况,说明一般框支撑玻璃幕墙设计时,无须进行横杆抗扭校核;但是对螺杆孔壁局部承压变形分析后,提出杆件必须进行抗倾覆校核。     

Profile evaluation of rail joint in a 3-m wavelength based on unsupervised learning

Previously, electronic straightedges with a length of 1 m were widely used to measure the longitudinal profiles of rail joints. However, owing to the lack of an efficient measurement device, rail joints with 3-m wavelengths are seldom studied. In this study, a rail measurement trolley based on the chord-reference method was developed with a measurement wavelength of up to 3 m. A field measurement was performed on a 53-km metro line, and the waveforms of 4340 rail joints were obtained. First, to visualize the distribution of the dataset and to find out the common features, t-distributed stochastic neighbor embedding dimensionality reduction was applied to the rail joint dataset, and each rail joint waveform was mapped to a point in a two-dimensional space. Second, K-means was applied to the rail joint dataset, and six categories of rail joints were obtained. The results indicated that there are two types of rail joints: M-type and W-type, accounting for 18.41% and 76.08% of the total number of joints, respectively, and the remainder are bolted rail joints. Third, to better evaluate rail joint status, the concept of rail joint triangle (RJT) is proposed, and five shape-based features of a rail joint in 3-m wavelength are defined. Finally, using RJT distribution analysis, we observed that the shape-based features provide more essential information about a rail joint, such as symmetry, asymmetry, M-type, or W-type, compared with conventional indexes such as the quality index. Notably, compared with the waveform of a rail joint at 1 m, a 3-m waveform provides significantly more essential information, which can be meaningful for future research on the dynamic impact of rail joints, as well as profile grinding around rail joints. To help other researchers follow our research, our dataset is available on Mendeley Data (RWJ-3 m dataset).     

南京轨道交通规划建设对城市发展的影响

发展城市轨道交通是实现南京城市可持续发展的根本保证。本文首先对快速轨道交通与南京城市空间结构的相关关系进行了阐述, 然后在快速轨道交通的建设对于南京商业中心、沿线土地利用、沿线房产价格的影响等方面也进行了一定研究,最后提出了基于南京城市发展的轨道线网规划设想。     

以轨道交通支持天津市城市空间结构转化——天津市市域轨道交通系统规划

交通系统与城市空间结构是相互联系、相互推动的关系。轨道交通作为现代化、快速、大运量的客运系统,对城市空间演变发挥着重要作用。随着城市的快速发展,天津市的空间布局面临着重大转变。天津的市域轨道交通系统规划,以城市空间发展战略为依托,以积极引导天津市空间结构转化为目标,规划构建包括市域线及城区线两级线网、全市域联网互动的轨道交通网络。     

LGO与GAMIT进行GPS基线解算的精度分析——以昆明市城市轨道交通框架网为例

城市轨道控制网是城市轨道建设的基础,本文介绍了昆明市城市轨道交通框架网基线解算方式和解算成果的验证方法,已确保数据质量的可靠性,为城市轨道建设奠定基础。其通过使用LGO和GAMIT两套GPS基线解算软件解算,将基线解算成果进行对比分析,得出解算结论和各软件的特点。     

浅议提高无缝线路养护维修质量

对无缝线路和普通线路进行了比较,并提出了无缝线路在养护维修中的难点,详细地阐述了提高无缝线路养护维修质量的具体方法,以保证无缝线路的质量,为铁路不断提高运输能力提供可靠的、强有力的基础设施.