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101.
通过对某机场水泥砼道面温度场和温度应变的现场实测 ,在此基础上提出了水泥砼机场道面温度场和温度应变场的变化规律 ,最后采用理论分析计算与实测温度应力 (应变 )进行比较 ,以验证理论计算的正确性 相似文献
102.
周晓林 《铁道标准设计通讯》2020,(3):6-11
铁路和民航均是我国综合运输体系的重要组成部分,针对高速铁路引入机场在设计中需要注意的问题进行全面分析和总结,从国内高速铁路引入机场的现状、需遵循的原则、民航规范规定的要求、线路敷设方式、设计需开展的专题以及线路方案、站场布置形式等方面进行阐述。研究结论为:高速铁路引入机场宜采用地下线形式,区间隧道应尽量避免穿越机场跑道,车站布置应根据运输组织模式和车流特点选择合适的站型,并实现与航站楼间的无缝衔接,设计要充分重视民用机场的相关规范、规定,重视高速铁路引入机场后,对机场电磁环境、微振动环境等的影响,保证机场安全、正常运行。 相似文献
103.
Airport surface congestion results in significant increases in taxi times, fuel burn and emissions at major airports. This paper describes the field tests of a congestion control strategy at Boston Logan International Airport. The approach determines a suggested rate to meter pushbacks from the gate, in order to prevent the airport surface from entering congested states and to reduce the time that flights spend with engines on while taxiing to the runway. The field trials demonstrated that significant benefits were achievable through such a strategy: during eight four-hour tests conducted during August and September 2010, fuel use was reduced by an estimated 12,250–14,500 kg (4000–4700 US gallons), while aircraft gate pushback times were increased by an average of only 4.4 min for the 247 flights that were held at the gate. 相似文献
104.
105.
吴昊 《城市轨道交通研究》2015,18(6)
近年来,随着国内机场客流量的高速增长及城市轨道交通建设步伐的加快,各大、中城市也开启了轨道交通机场线的建设。结合国内外机场提前值机的概念,以西安北客站至咸阳国际机场的轨道交通机场线为例,分析了值机客流的特征,研究了具备提前值机功能的轨道交通机场线车站布局的3个可行性方案,并指出了实现机场功能外移所存在的问题。 相似文献
106.
This paper looks at the energy consumption and green house gas emissions of inland river shipping, and compares them with the performance of seagoing ships. The analysis is based on a case study of container shipping on the Yangtze River, China. Data were collected under both calm water and real navigation conditions, and energy efficiency operation indices under these conditions are calculated and analyzed. We find that the navigation environment can influence significantly the operational energy efficiency of inland river ships. 相似文献
107.
机场作为民航运输市场体系中的一个重要组成部分,是衔接民航运输市场供给和需求的纽带。长期以来,机场在市场经济活动中处于相对被动的地位,使机场的建设投资、经营管理、政府监管等方面出现偏差。随着航空运输市场的不断发展,各机场呈现快速增长态势的同时也会遇到了各种瓶颈。只有通过正确认识机场的经济特性,不断更新观念,深入探讨机场的市场营销策略,才能在激烈的竞争中赢得优势,实现较短时期内机场的稳步发展。 相似文献
108.
轨道交通设施引入机场后使机场陆测交通设施竖向布局设计更加复杂多样。分析了大型机场轨道交通线路走向与航站楼平面布局的关系,在剖析国内外各种实例的基础上,提出机场陆侧交通设施竖向布局模式;对各种模式的优缺点、换乘设施布局、旅客流程组织进行比较分析。 相似文献
109.
P. K. Else 《运输规划与技术》2013,36(4):295-300
This paper extends the discussion of certain problems associated with road pricing raised in an earlier contribution to this journal. Firstly it is shown that where the value of time varies between different groups of traffic using the same congested road, optimal road pricing requires price discrimination between the groups such that those with the lowest value of time pay the highest charge and suffer the greatest losses. However, a uniform price based on an “equity” value of time would reduce the relative distributional effects. Secondly the paper takes up the suggestion that queueing (and by extension congestion) may be positively helpful in the allocation of resources and shows that this is not in general correct although there are situations in which the use of queueing alongside conventional pricing may have a role to play. Finally it is argued that governments’ apparent lack of enthusiasm for road pricing stems as much from political considerations as the more technical problems of applying it. 相似文献
110.
As the interface point between road and rail, intermodal freight terminals (IFTs) are critical elements in the total freight distribution chain. This paper addresses the twin objectives of reducing freight transport costs and improving customer service by putting forward a number of indicators designed to measure the performance of IFTs. Each of the three major performance areas, namely customer service, operational efficiency and terminal productivity are discussed in detail. A methodology is put forward which enables operating strategies to be evaluated. Computer simulation is used in order to arrive at strategies which reduce operating and capital costs and satisfy customer service requirements. The simulation model outputs include performance measures related to customer service such as mean waiting times required for loading and unloading of containers, as well as productivity measures of terminal operations such as lifting equipment utilisation. 相似文献