A new composite decision support framework for strategic and sustainable transport appraisals

This paper concerns the development of a new decision support framework for the appraisal of transport infrastructure projects. In such appraisals there will often be a need for including both conventional transport impacts as well as criteria of a more strategic and/or sustainable character. The proposed framework is based on the use of cost-benefit analysis featuring feasibility risk assessment in combination with multi-criteria decision analysis and is supported by the concept of decision conferencing. The framework is applied for a transport related case study dealing with the complex decision problem of determining the most attractive alternative for a new fixed link between Denmark and Sweden – the so-called HH-connection. Applying the framework to the case study made it possible to address the decision problem from an economic, a strategic, and a sustainable point of view simultaneously. The outcome of the case study demonstrates the decision making framework as a valuable decision support system (DSS), and it is concluded that appraisals of transport projects can be effectively supported by the use of the DSS. Finally, perspectives of the future modelling work are given.     

Estimating economic and resilience consequences of potential navigation infrastructure failures: A case study of the Monongahela River

The paper examines the potential effects of failure of heavily used, outdated locks and dams on the Monongahela River in southwestern Pennsylvania. Catastrophic failure would result in lengthy outage of barge traffic. The displaced volume of coal shipments from mines to power plants is estimated using Energy Information Administration survey data. The resilience of the impacted facilities, the viability of their shipping alternatives, and their ability to re-organize into new markets is assessed. Lost revenues are estimated for facilities that close due to an inability to adapt, as well as the replacement cost of towboats and barges trapped by a catastrophic and sudden failure. The aggregate costs to these facilities as a result of a year-long closure are estimated at $0.56-1.7 billion.     

铁路电务专业系统绩效考核机制建设的探索与实践

从分析传统考核机制存在的问题入手,探索建立一套以月度专项检查考核、季度综合管理评价考核、半年度管理诊断评价考核、年度安全评估为主线的绩效考核机制;通过与传统的电务绩效考核机制进行对比,阐述新时期电务绩效考核机制建设的主要特点,并对其实施效果和体会进行了分析。     

农村公路资金渠道配置评价的相对标度法

为评判农村公路资金渠道配置的相对合理性,在分析中国农村公路建设和养护资金渠道基础上,提出资金渠道配置评价的相对标度法。利用相对标度计算各资金渠道的重要度(权重),定义一个"标准"地区,确定标志值,估计反映各渠道配置相对合理性的匹配系数并求和,给出中国农村公路建设和养护资金主要渠道的权重参考值。实例计算结果表明:该方法简单、实用,且具有很强的灵活性,可用来优化农村公路资金渠道配置。     

CA6123SH2型城市客车设计

简要介绍CA6123SH2客车的设计思想、整车造型、结构设计、工艺和主要技术参数。     

广州珠江黄埔大桥北汊斜拉桥钢箱梁架设起重机研究设计

根据广州珠江黄埔大桥北汊斜拉桥的钢箱梁结构及地理安装特点,提出了该桥钢箱梁的架设方案,针对钢箱梁架设方案研究提出了架梁起重机的实施方案,并对该型起重机的技术特点进行了总结。     

承(德)-秦(皇岛)出海公路工程南寨大桥分联处桥墩设计技术分析

介绍承秦出海公路双牛段南寨大桥分联处桥墩的设计情况,从结构计算和设计理论方面分析设计思路,对设计效果进行评价,对设计中的经验和教训进行总结。     

客运专线常用跨度桥梁技术特点

客运专线的建设，带动了铁路桥梁建设整体技术水平的发展，也在一定程度上反映了高速条件下铁路桥梁的发展趋势。为了今后更加科学合理地开展高速铁路建设，有必要在建设过程中总结经验、系统测试，形成高速条件下的桥梁建设的一套较完善的理论和技术。介绍客运专线常用跨度桥梁的设计、施工特点。     

莆田市荔港大道准快速路设计

该文以莆田市荔港大道准快速路设计为实例,通过对“准快速路”这一道路类型的设计介绍,提出了一种介于城市快速路与主干路之间的经济、实用的城市道路设计思路。文章详细介绍了该准快速路设计的技术标准及总体方案。     

抛石层灌注桩施工新工艺的应用

抛石层灌注桩施工工艺的应用填补了国内灌注桩施工的一项空白,它具有操作简便、确保成孔质量、设备简单、工期短、成本低等特点。取芯注浆是该工艺的核心工序。它的应用为今后同类地质条件下的灌注桩施工提供了经验。