车站接触网在股道间立柱方案研究

普速铁路项目中,越来越多的大型铁路客站采用无站台柱雨棚形式,常规的在站台上组立横跨柱悬挂接触网势必影响车站整体景观。为实现站台无结构柱理念,股道间立柱悬挂接触网为首选方案。主要从接触网支柱、腕臂支持结构、基础及附加线安装等方面对股道间立柱方案进行研究,使接触网在满足使用功能的前提下,与车站建筑结构和整体景观相协调。     

桩-土作用在大型旅客站房基础设计中的应用

当大型旅客站房基础与地下出站通道重叠时,由于地下出站通道刚度大、结构超长,且属半露天地下结构,对温度作用变化明显,利用传统的刚性固结模型对站房基础进行设计时较难得到合理的结果或造成巨大的浪费。论述桩-土作用机理的复杂性,并对桩-土作用力学模型进行分析。通过分布弹簧模型对旅客站房在温度作用下的结构内力进行分析,并与刚性固结模型计算结果进行对比,得出旅客站房基础设计考虑桩-土作用的合理化计算模式。     

强关联性地铁车站的界定及设计要点分析

强关联性车站作为一种新出现的车站形式其被界定的时机对车站方案设计影响重大,在设计阶段需要特别注意,及早甄别。通过定义强关联性车站,从其界定的最佳时机、基本分类以及隐蔽性强关联性车站设计实例,介绍强关联性车站界定要点说明,指出强关联性车站内在关联性以及判别的外在切入点。     

Continuous approximation for skip-stop operation in rail transit

Operating speed of a transit corridor is a key characteristic and has many consequences on its performance. It is generally accepted that an increased operating speed for a given fleet leads to reduced operating costs (per kilometer), travel and waiting times (three changes that can be computed precisely), an improved comfort and level of service, which can attract new passengers who are diverted from automobile (items harder to estimate precisely). That is why several operation schemes which aim to increase the operating speed are studied in the literature, such as deadheading, express services, and stop skipping.A novel category of solutions to this problem for one-way single-track rail transit is to perform accelerated transit operations with fixed stopping schedules. The concept is quite simple: as the time required for stopping at each station is an important part of travel time, reducing it would be a great achievement. Particular operations that take advantage of this idea already exist. This paper focuses on one of them: the skip-stop operation for rail transit lines using a single one-way track. It consists in defining three types of stations: AB stations where all the trains stop, and A and B stations where only half of the trains stop (stations type A and B are allocated interchangeably). This mode of operation is already described in the literature (Vuchic, 1973, Vuchic, 1976, Vuchic, 2005) and has been successfully implemented in the Metro system of Santiago, Chile.This work tackles the problem with a continuous approximation approach. The problem is described with a set of geographically dependent continuous parameters like the density of stations for a given line. Cost functions are built for a traditional (all-stop) operation and for skip-stop operation as described above. A simple example is presented to support this discussion. Finally, a discussion about the type of scenarios in which skip-stop operations are more beneficial is presented.     

简析地铁安全门驱动控制器的控制构架

针对地铁安全门驱动控制器,提出了一种电机控制软件构架。该构架以嵌入式操作系统为基础调度各控制任务,将控制任务分为高优先级任务和低优先级任务。在该控制构架基础上,完成了地铁安全门驱动控制器的软件系统,并在样机上进行了应用测试。试验表明,该电机控制软件构架运行稳定,能有序地调度各控制任务,并具有良好的复用性和扩展性。以该构架为基础开发的驱动控制系统控制精度高,动态响应好,能够满足现场应用的需求。     

利用机车信号数据分析补偿电容工作状态

为了弥补ZPW-2000移频轨道电路补偿电容动态检测盲区,通过实践验证并总结了利用机车信号数据分析站内侧线股道补偿电容工作状态的方法,从技术方法上解决了利用机车信号数据分析来弥补站内侧线股道处于动态检测死角问题,为分析ZPW-2000移频轨道电路补偿电容工作状态提供一种新方法。     

关于宝（鸡）兰（州）客专引入兰州车站方案研究

宝兰客专引入兰州枢纽,在规划中采用兰州西客站接轨方案.从城市格局、当地居民的乘车习惯、城市交通现状等方面,提出宝兰客专引入兰州站方案；并对宝兰客专引入兰州站和兰州西站的方案进行了论证分析.     

地铁明挖区间大跨度密排预应力框架箱型隧道技术

介绍地铁明挖区间大跨度密排预应力框架箱型隧道技术,该技术涉及土建和预应力专业,施工协调和工序转换相对一般地铁土建施工更为复杂。该施工技术通过在箱型结构内增加环向后张拉预应力密排框架梁,改善箱型隧道结构受力体系,提高箱型隧道结构承载能力,突破现有地铁结构空间限制。     

嘉绍大桥大吨位提升站设计与施工

嘉绍大桥上部结构施工中,为满足架桥机的拼装及节段箱梁的提升功能需在深水域设置大吨位提升站,该提升站控制起吊净重达300t,起吊跨度达53m。考虑强涌潮水压力的制约、冲刷以及台风的影响,经综合比较,采用固定式提升站方案。提升站立柱采用钢管结构,下部为打入钢管桩,钢管桩通过联结系与主桥基础连接,充分利用主桥基础抵抗部分水平力;提升站主梁采用钢箱梁,单个提升站设置2片主梁,主梁上方布置单侧单轨移动天车。提升站立柱在工厂分段制造,工地上现场拼装;主梁在工厂分3节制造,运输至现场焊成整体。     

新建结构与运营地铁车站接驳关键技术

以深圳地铁新建3号线老街站换乘综合体与运营地铁车站接驳工程为实例,对运营车站临时加固防护、分部切割既有结构、新旧结构接驳等关键技术展开论述。提出运用金刚石绳锯与金刚石水钻相结合的一种静力切割工艺,很好地解决了该工程作业环境复杂、技术要求高、风险大等难题,安全、高效地完成了新建结构与运营地铁车站接驳工程。