DJ2型机车停放制动控制方式设计改进

介绍了DJ2型机车为实现不停车微机复位功能而对停放制动控制系统进行的改进设计,阐述了改进后的原理及操作方法,并结合现场应用实际给出优化建议。     

Effect of parking information on travelers' knowledge and behavior

In many urban centers the demand for parking increases sharply before Christmas mainly due to shopping activity — causing parking congestion. One way to ameliorate such congestion is by disseminating parking information. Informed drivers may divert to relatively under-utilized parking facilities relieving the pressure on congested facilities. The City of Nottingham in England tested a real-time parking information system designed to alleviate congestion in the City Center parking facilities. Real-time information was disseminated through the radio, while historical information regarding parking locations was disseminated through newspaper advertisements and leaflets. The objective of this study is to assess impacts of the parking information system on travelers' knowledge and decisions.Survey research was used to understand traveler response. Respondents' levels of knowledge regarding car parks were analyzed by developing Poisson regression models. Drivers were more likely to have greater knowledge of city center car parks if they used several information sources (radio broadcasts, newspaper advertisements or leaflets and word-of-mouth), were active seekers of parking information, and searched for parking rather than going directly to a parking facility. In addition, the study of behavior showed that drivers were more inclined to use the relatively under-utilized Park-and-Ride facilities instead of the city center car parks if they received parking information from Newspaper advertisements/leaflets. Overall, the parking information service in Nottingham was effective; it seems reasonable to establish such information dissemination and monitoring systems at parking facilities in other urban areas. Furthermore, to support informed travel and activity participation decisions, parking information should be integrated with traffic and transit information.     

城际铁路到发线有效长研究

根据到发线有效长的原始定义,提出影响城际铁路到发线有效长的4个组成因素———列车长度、停车余量、安全防护距离、警冲标至绝缘节的距离。针对这4项影响因素逐项进行详细分析,并结合城际铁路设计实际在有到发线中间站、无到发线中间站及尽头式终点站3种车站布置形式下进行实例计算,初步得到了城际铁路到发线在不同组织模式下的有效长度,得出了城际铁路中间站不同布置形式下的到发线有效长。。     

基于主成分分析的居住区停车需求预测研究

在大量调查数据的基础上,通过停车特征参数的分析,提出了影响停车需求的多个因素。对其中的几个主要因素进行主成分分析,剔除权重最小的因素,建立了停车需求与剩余因素之间的预测模型。     

市域快线长大区间故障救援与配线设置探讨

市域快线站间距通常远大于常规地铁线路,在市域快线长大区间中采用常规地铁的故障救援模式及救援速度可能导致救援时间过长。为了提高市域快线长大区间故障救援效率,以广州市规划的首条160 km时速市域快线为例,在分析常规地铁故障救援流程、救援速度和救援时间的基础上,对市域快线故障救援速度进行探讨,进而设计了长大区间设置渡线和设置停车线2类方案,与无配线方案在救援时间、后续堵塞列车疏散效率等关键指标上进行综合比选,最后提出不同的区间停车线形式并进行了对比分析。研究表明:在长大区间设置停车线的方案救援功能较好,建议在工程条件允许时优先采用;不同的区间停车线形式各有优劣,应根据实际情况综合考虑运营功能和工程规模后选择。     

盾构施工安全穿越禄口机场复合地层段的数值模拟与监测分析

盾构施工过程中由于土体挖除、管片和二衬设置,将在穿越过程引起机场滑行道和停机坪沉降或隆起,对机场正常运营产生不利影响;通过优化盾构机施工参数,从而降低盾构下穿过程中对机场的不利影响。基于ABAQUS有限元法,建立南京至高淳城际快轨下穿禄口机场复合地层段的有限元模型,分析盾构法施工引起的机场停机坪及滑行道变形特征,最终沉降最大值约为11 mm,最大隆起值约为2 mm,同时得到盾构施工工作参数。对比实际施工监测数据,针对施工风险提出更安全的盾构施工参数。     

地铁车辆段/停车场运用库设计及实施中的若干问题探讨

结合杭州地铁车辆段/停车场运用库建设过程中出现的问题实例,从使用维护、节能管理等运营角度对运用库列检列位数量比例及其布局型式、检查坑长度、防排水、动力照明等若干问题进行探讨,并提出相应的优化设计与实施建议,为地铁新线运用库建设提供参考。     

和谐号动车组停放制动控制

停放制动是防止静止状态下的动车组列车发生溜逸的一种制动方式。介绍了停放制动装置功能和相关技术参数的设计、计算过程。对停放制动的施加和缓解指令的来源、传输途径、执行等环节进行详细说明。最后结合单车和全列停放制动的状态诊断和故障导向安全控制功能,对停放制动的相关逻辑进行了深入分析。     

地铁停车场和车辆段杂散电流实测与分析

<正>线钢轨泄漏的杂散电流所造成的车辆段和停车场内设备烧损和挂地线打火等问题在城市轨道交通中日益凸显。为此,以某地铁停车场和车辆段线路的实测数据为依据,评估杂散电流的严重程度,分析杂散电流的流通路径,并针对该地铁线路杂散电流现状提出相应的改进措施。     

停车诱导信息的发布

目前，国内各大城市中关于停车位置及泊位利用情况的信息提供相对比较缺乏，导致停车场使用不合理，如何有效地向驾驶员提供信息，采用什么样的方式、怎样才能使信息提供收到预期的效果是解决停车难问题的关键，文中探讨了信息提供的内容、方式以及诱导屏的设计和设置，并结合湖州市停车管理规划项目给出了设计实例。