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通过上海市轨道交通10号线溧阳路站南端头井深基坑开挖承压水处理的工程实例,研究分析了水平隔断承压水的作用与优势。通过分析比较,采用了在基坑底部进行水平封堵承压水的技术方案,有效减小对周边环境的影响,确保了轨道交通4号线区间的运行安全。可为类似工程提供借鉴。 相似文献
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介绍上海轨道交通9号线一期工程中春路站的改建设计方案,重点对线路配线型式及结构改建方案进行论述。 相似文献
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车辆段(场)是轨道交通工程的重要组成部分,是确保全线正常运营的重要保障设施。合理的车辆段(场)选址需综合考虑工艺使用要求、占地拆迁、工程实施难易程度、环境和谐等多方面因素。对上海轨道交通15号线车辆段选址方案进行了分析、比选及选择,可供同类工程借鉴。 相似文献
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轨道交通静安寺枢纽站换乘方案研究 总被引:2,自引:2,他引:0
轨道交通M7线、M6线和已建地铁2号线在静安寺形成大型换乘枢纽,介绍了轨道交通静安寺枢纽站多个换乘方案,对各个方案的优缺点进行分析,提出推荐方案。 相似文献
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上海崇明越江通道长江隧道工程综述(一)——长江隧道工程设计 总被引:6,自引:0,他引:6
介绍了上海长江隧桥(崇明越江通道)工程的建设背景、规模和上海长江隧道建设的自然条件;阐述了工程总体设计方案,以及超大直径盾构隧道管片结构、大深度高水压管片防水、长距离隧道通风系统和防灾体系等关键技术方案;描述了两台Ф15430泥水加压复合盾构机的性能特点;叙述了隧道总体施工方案和盾构隧道施工正面稳定、大直径隧道抗浮、长距离施工测量、内部结构同步施工、成淡交替土层环境条件下连接通道施工等长大越江隧道关键施工技术方案和风险预案措施。 相似文献
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This study examined the changes in the media coverage of two road pricing schemes proposed in the Netherlands in the period 1998–2010, as well as the link between the media coverage and the policy debate. Both pricing proposals were debated for several years and neither was introduced. Our findings show that space allocation for type of overall tone (e.g. negative or positive towards a pricing proposal) and the range of issues and policy actors in the media coverage were very different for the two proposals, and for each proposal fluctuated greatly over time. Our analysis suggests that such a variation in the media coverage was a reflection of changes in the content of the policy debate (e.g. caused by the specific design features of pricing proposal under discussion, the different policy actors engaged in the debate and their messages about the proposal). This indicates that policymakers can influence the media coverage of road pricing policies to some extent by managing the policy debate. Our findings also show not only that changes in the content of the policy debate were reflected in the media coverage, but also that the media coverage influenced the policy debate: the statements or actions of policy actors received media coverage, which then in turn stimulated the policy debate. However, the influence of media on the policy debate was rather indirect, in that policy actors mostly reacted to the messages from other policy actors reported in the media and to a lesser extent to the media coverage itself. 相似文献
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In October 2013, the International Civil Aviation Organization (ICAO) announced that it would put in place a market-based mechanism to cap net greenhouse gas emissions from international civil aviation at 2020 levels. This paper analyses the obligations that would be placed on real airlines under an initial draft “Strawman” proposal that was originally formulated as a starting point for discussions within ICAO, and the extent to which such a proposal would succeed in keeping emissions at or below the desired level. The provisions of the ICAO proposal were then applied to more than 100 existing airlines. In order to protect commercial sensitivities, we used hierarchical cluster analysis to identify groups of different types of airlines. We report the results for these groups rather than for individual airlines. While ambiguities in the Strawman proposal complicated the analysis, we found that, depending on their size and rate of growth, airlines will be required to offset very different proportions of their emissions from international flights. A system of de minimis exemptions, as currently proposed, would benefit some rich countries as well as poor ones. Targeting such exemptions more narrowly would raise practical difficulties, which we describe. We conclude by recommending that ICAO design and implement a much simpler system; and propose one alternative. 相似文献
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针对目前基坑围护工程设计中的成本控制问题,介绍了通过应用价值工程理论控制基坑围护成本的方法。通过探索,把价值工程理论和方法运用在整个基坑围护设计过程中,使设计更加安全可靠、经济合理,并能有效控制和降低成本。 相似文献
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文章基于当前广西公路勘察设计质量和工程造价现状,分析了公路工程勘察设计质量和造价控制方面存在的主要问题,提出了提高勘察设计质量、控制工程造价的对策。 相似文献
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文章结合广西桂海高速公路改扩建工程实例,基于高速公路改扩建路线设计的思路及原则,介绍了桂海高速公路改扩建工程设计方案与路线平纵横断面设计方法,为国内类似工程设计提供参考。 相似文献