深圳地铁18标段暗挖隧道防水问题的探讨

结合深圳地铁十八标段喷锚构筑法暗挖隧道的防水施工与治水措施,分析了防水层与防水混凝土的实际作用,建议取消经实践验证防水效果差的防水板,将防水的措施集中到结构防水混凝土方面,达到改善防水效果、满足防水要求的目的.     

隧道分区防水模型试验及工程应用研究

文章针对复合式衬砌在防水方面存在的问题,通过结构模型实验,对隧道复合衬砌卷材防水板分区防水的关键技术进行研究,对其防水效果进行综合评价,提出了分区防水的原则、设计参数和确保分区成功的拱顶注浆参数,同时为隧道分区防水的施工工艺提供确切的试验依据.阳宗隧道富水段工程运用分区防水技术,实现了隧道富水段不渗不漏目标,防水效果优异.     

路桥用APP防水卷材的防水机理分析与应用

论述了路桥用APP防水卷材主要的材料性能,通过对其物理力学性能及防水机理的分析,结合已有路桥工程实践中应用的APP防水卷材经验,可知使用APP防水卷材,对沥青混凝土桥面防水和白加黑路面改造的反射裂缝治理与防水是十分有利的.     

防水板在隧道中的应用--新加坡Senoko Cable隧道防水与国际标准的比较

一直以来,隧道防水都是世界上一大难题难以预测的水流、复杂多变的地质、狭窄有限的地下空间.另外,一旦隧道竣工后,修补机会就微乎其微.文章详细阐述了这些难点并着重关注防水板应用于矿山法隧道的防水方案.对于防水系统,各国有着不同的标准和方法,在新加坡Senoko Cable隧道中,竖井和连通道采用了防水板防水系统,文中讲述了该工程的具体防水难点及其解决方案.     

从设计角度分析南宁轨道交通工程现阶段的防水体系

地下工程防水对结构的稳定性和耐久性有着至关重要的作用。以南宁轨道交通2号、4号线的结构防水设计为例,介绍和分析了防水体系的设计理念,强调了轨道交通防水设计的重点和难点。期许通过合理的技术创新,设计出更好的防水体系,以供类似工程参考。     

越江沉管隧道管段及接头防水

文章阐述了对沉管隧道接头防水和管段本体防水应各自具有双重防水性能的有关技术以及外防水结构形式的一些看法,并对GINA外止水带的几种不同形式提出了个人观点,可供国内同行们参考.     

盾构法隧道的嵌缝防水

嵌缝防水是盾构法隧道防水的最后一道防线。结合上海市地铁2号线区间盾构隧道嵌缝防水的设计与施工，阐述了嵌缝防水的意义和设计思路，并着重介绍了嵌缝防水施工中的一些常见问题及其应对措施。     

建筑防水卷材质量检测中常见问题探讨

随着建筑行业的不断发展和技术的不断创新,建筑防水卷材的质量检测变得越来越重要,不合格的防水卷材可能会导致严重的水损害,从而对建筑结构和室内环境产生不可估量的影响。本文首先介绍了建筑防水卷材的主要类型,其次分析了建筑防水卷材质量检测中的常见问题,最后结合实际提出了建筑防水卷材质量检测中常见问题的防治措施,旨在给相关工作提供参考。     

东秦岭隧道防水技术

文章着重介绍了东秦岭隧道软弱富水围岩地段的防水措施,对隧道加强初期支护防水和衬砌防水体系相结合取得的良好效果进行了分析总结.     

海外高水压大直径盾构法隧道防水设计

孟加拉国卡纳普里河隧道项目是中国践行"一带一路"倡议的重点项目,具有直径大、水压高、强渗透性等特点。针对海外高水压大直径盾构法隧道项目的工程特点,在总结国内外现有研究成果的基础上,从防水功能定位及材质选用要求入手,对管片结构自防水、管片接缝防水及螺栓孔防水等方面进行了综合分析,形成了完整的盾构防水设计体系,为类似工程的防水设计提供参考。     

高速公路改扩建工程水土保持监测与评价

开展水土流失监测是水土保持监管的重要手段。文章以广西沿海高速公路改扩建工程一期工程水土保持监测实践为例,分析了工程建设水土流失特点,介绍了水土保持监测技术和方法,并通过对工程实例监测结果的分析评价,提出了水土保持监测工作中易出现的问题及相应的解决方案。     

Logsums for utility-maximizers and regret-minimizers,and their relation with desirability and satisfaction

This paper studies to what extent the Logsum-measure of user benefits relates to travelers’ perceptions of choice set-desirability and choice-satisfaction. Knowing these relations is important since researchers have recently started to analyze and interpret user benefits in general – and Logsums in specific – in terms of these more behaviorally oriented notions, rather than in terms of expected utility. Participants to a stated route choice experiment were asked to indicate, after each choice made, to what extent they considered the choice set to be desirable, or to what extent they were satisfied with the chosen alternative. These measurements were correlated with Logsums that were computed for each choice situation. In addition, the paper derives a regret-based Logsum (which gives the expected regret of a choice situation) and presents a comparison with its utilitarian counterpart. Also for this regret-based Logsum, correlations with desirability- and satisfaction-ratings are computed. As a general finding, it appears that all computed correlations are rather weak. This suggests that, at least in the context of our data, the utility-based Logsum and its regret-based counterpart appear to have only a fairly weak connection with the behavioral notions of choice set-desirability and choice-satisfaction.     

公路与水路运输节能减排量化分析和比较

通过研究汽车与船舶的油耗特点,结合燃油种类与CO_2排放量的关系,建立了计算公路运输与水路运输单位耗油量与单位CO_2排放量的数学模型。通过敏感性分析,研究车速或航速与载货率对车辆或船舶单位CO_2排放量的影响。以从厦门港到盐田港的干散货运输为例,做了节能减排计算分析,并将结果与用其他方法获得的结果对比。在此基础上,对公路运输与水路运输节能减排做了敏感性分析研究,可以计算出能够体现水路运输节能减排优势的临界货运量。结果表明本文中介绍的方法能够为核算、比较公路运输与水路运输的节能减排效果提供更科学的量化参考。     

Resilience and accessibility of Swedish and Dutch municipalities

Recent years have shown a rising popularity of the concept of resilience—both theoretically and empirically—in complex systems analysis. There is also a rising literature on resilience in the transport and spatial-economic field. The pluriform interpretation of resilience (e.g., engineering vs. ecological resilience) is related to methodological differences (e.g., stability in dynamics vs. evolutionary adaptivity). But in all cases the fundamental question is whether a complex system that is subjected to an external shock is able to recover, and if so, to which extent. The present paper [Based on presentation from cluster 6 (Accessibility) of the Nectar 2015 conference in Ann Arbour, USA.] aims to add a new dimension to resilience analysis in spatial systems, by addressing in particular the relationship between spatial accessibility at a municipality level and the resilience outcomes of the spatial system concerned. It does so by investigating to which extent accessibility of Swedish and Dutch municipalities has mitigated the local shock absorption from the recent economic recession. In our study the shock absorption capacity of municipal accessibility is estimated by analysing the relevant resilience indicators for the period concerned. In this context, conventional resilience indicators based on either multivariate complex data (in particular, the Foster Resilience Capacity Index) or employment data (in particular, the Martin Resilience-Employment Index) are confronted with spatial connectivity data based on local accessibility measures, so that geographical mobility may be regarded as one of the shock-mitigating factors. The empirical analysis is carried out for two countries which have both proven to be rather shock-resistant during the recent economic crisis, viz. Sweden and The Netherlands. Clearly, the geographical structure of these countries forms a sharp mutual contrast, viz. a spatially dispersed economy with a few distinct urban concentrations versus a spatially dense economy with one major metropolitan centre (the Randstad), respectively. Our experiments are carried out for the 290 municipalities in Sweden and 40 COROPs in The Netherlands. Our research findings show relevant and new insights into differences in the local recovery potential in Sweden and The Netherlands.     

互联互通,走向繁荣

设施联通是"一带一路"国际合作高峰论坛六个平行主题会议之一,以"互联互通、走向繁荣"为主题,各国共商共议交通、能源、通信等设施联通务实合作。随着未来全球范围内基础设施的升级换代和互联互通,交通、能源与通信技术融合发展,催生新的业态,是拉动经济增长的新动能。在新一代基础设施网络体系的建设中,后发国家面临跨越发展的难得机遇,中国基础设施发展的经验具有重要借鉴意义。     

科技创新与公共自行车系统发展

城市公共自行车的发展已经历了三代,正向着第四代公共自行车系统发展。为探究科技创新在其发展过程中所起的作用,高新技术是否能够从根本上解决中国城市公共自行车损坏率过高的问题,以及高新技术在新一代公共自行车系统中的发展方向,笔者通过对城市公共自行车系统发展历程的回顾,发现科技创新在公共自行车系统发展过程中起到了积极的推动作用,但不能从根本上解决车辆被盗和损坏的问题。进一步分析了高新科技对公共自行车系统的利弊,指出需要因地制宜的发展项目,不应一味的追求高新技术在系统中的应用。最后展望第四代公共自行车发展,探索了与公共自行车系统相关的高新技术下一步的发展方向。     

材料节约与循环利用专项行动计划技术成果简介

当前，加快建设资源节约型、环境友好型社会已提升为国家战略。交通运输部为加快建设资源节约型、环境友好型交通，组织开展了“材料节约与循环利用专项行动计划”。通过专项行动大力推广路面再生技术、废胎胶粉筑路应用技术、机制砂混凝土技术以及聚合物改性水泥混凝土技术等西部交通建设科技项目成果，以为交通建设资源的高效利用和循环使用提供示范。本刊现以专栏形式介绍上述成果的相关内容，以飨读者。     

Subjective well-being and travel: retrospect and prospect

Although the improvement of well-being is often an implicitly-assumed goal of many, if not most, public policies, the study of subjective well-being (SWB) and travel has so far been confined to a relatively small segment of the travel behavior community. Accordingly, one main purpose of this paper is to introduce a larger share of the community to some fundamental SWB-related concepts and their application in transportation research, with the goal of attracting others to this rewarding area of study. At the same time, however, I also hope to offer some useful reflections to those already working in this field. After discussing some basic issues of terminology and measurement of SWB, I present from the literature four conceptual models relating travel and subjective well-being. Following one of those models, I review five ways in which travel can influence well-being. I conclude by examining some challenges associated with assessing the impacts of travel on well-being, as well as challenges associated with applying what we learn to policy.