桥梁维修加固施工技术研究

文章以崇左大桥维修加固项目为工程背景,介绍了桥梁维修加固的原因、原则,阐述了桥梁维修加固的施工技术,以期为桥梁维修加固技术的实际运用提供借鉴。     

南友高速公路龙州左江大桥维修加固实践分析

文章结合龙州左江大桥维修加固工程实例,介绍了该桥总体维修加固方案,分别阐述了支座更换与粘贴钢板两种维修加固施工工艺要点,为类似桥梁维修加固提供参考。     

西部地区桥梁维修加固质量检验评定方法研究

《西部地区桥梁维修加固质量检验评定方法研究》项目从桥梁维修加固工程项目质量形成的内在规律和实际需要出发,研究建立合理、适用的工程质量检验评定方法体系,以促进我国公路桥梁维修加固工程质量和工程管理水平的提高,保证维修加固目标的实现。本篇介绍了该项目研究的主要内容、成果与经济、社会效益及推广应用前景,为西部地区桥梁维修加固工程提供参考依据。     

关于城市高架桥维修加固方案的研究

由于原设计荷载标准偏低,施工管理的粗放等原因,使得高架桥在当前运营过程中出现较多的病害,难以满足日益增加的使用要求,须进行必要的维修加固。以城市高架桥的维修加固设计为例,详细讨论了城市高架桥的病害特点、维修与加固方法等。     

百色百林大桥旧桥维修加固技术

文章以百色百林大桥维修加固工程为例，介绍了结合使用壁可法和灌注法粘贴钢板技术进行旧桥加固的施工工艺，为桥梁的维修加固提供参考。     

梧州市凤凰桥加固设计与施工

文章针对梧州市凤凰桥出现的病害,分析该旧桥破坏部位及其原因,提出了采用实腹式预制拱桥的维修加固方案,介绍了该维修加固施工方法及取得的效果,为同类旧桥加固提供借鉴。     

柳南高速公路洛维大桥维修加固与质量控制措施探讨

文章结合柳州(鹿寨)至南宁高速公路改扩建项目洛维大桥维修加固的工程特点,根据现有桥梁病害情况,综合利用加设体外纵向预应力钢束加固、粘结钢板加固、粘贴碳纤维布加固等方法,结合裂缝处理技术,提出适用于既有单箱式连续刚构桥梁和预应力T梁结构特点的维修加固方案,可有效提高桥梁承载力和耐久性,保证桥梁维修施工质量,为相似工程提供借鉴。     

高速公路桥梁维修加固工程

叙述了运营中的高速公路桥梁维修加固工程,介绍了高压喷射灌浆、毕克法封缝、粘贴碳纤维片等方法在高速公路桥梁维修加固中的应用.     

公路桥梁养护与维修加固施工关键技术分析

随着社会不断发展,人们日常生活出行对交通安全提出了更高的要求,公路桥梁作为国家交通的命脉,需要及时进行养护维修与加固的施工确保其安全性.本文分析了公路桥梁养护与维修加固施工的重要性,列举出公路桥梁养护与维修加固施工的各项技术,希望给有关部门提供参考.     

刚架拱桥上部结构加固维修技术研究与应用

以204国道墨水河大桥加固维修为实例,介绍了刚架拱桥上部构造病害特点及其成因,提出了综合加固维修方案,详细介绍了施工工艺与技术要求。     

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.     

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。     

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.     

隧道及地下工程结构防排水技术的发展和应用

文章总结了大瑶山隧道修建以来其复合式衬砌结构防排水试验研究和应用情况,介绍了塑料防水隔离层的防水机理及各种防水型式的优缺点,提出了改进建议.     

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。