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公路隧道防排水的设计与施工 总被引:1,自引:0,他引:1
由于隧道的防水与排水对工程质量与建成后的使用有其重要的影响,然而隧道的防水与排水的问题,牵涉从设计到施工,以至到使用阶段的全过程,是隧道工程建设者需要非常重视的问题.根据隧道围岩结构特征,破碎程度及其组合状态,一般地段与特殊复杂地段的不同情况,合理设计针对性地进行施工,以及采用适合的材料,对隧道的整体质量与运营寿命极为重要.重点叙述了隧道防排水系统的设计,材料的选择及其施工方法,便在相关领域工程中提供一些参考. 相似文献
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基于ADECO-RS工法城市浅埋隧道施工相关技术研究 总被引:1,自引:1,他引:0
以北京地铁五号线区间隧道为依托,以数值分析方法作为分析手段.研究了ADECO-RS工法在城市浅埋隧道设计与施工中应用的可行性.研究表明,当地面沉降控制标准不是十分严格时ADECO-RS工法可以应用于城市浅埋地下工程;但是对于地面沉降控制标准非常严格的情形,隧道施工方法必须综合考虑核心围岩加固和隧道周围围岩加固.核心围岩、仰拱围岩的注浆加固作用机理以及相关技术问题的研究,为基于地层位移控制的浅埋隧道设计与施工提供了理论基础. 相似文献
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罗汉山隧道设计为双向八车道连拱隧道,为目前国内最大跨度公路连拱隧道.文章对超大断面连拱隧道设计的技术标准、净空断面选取、结构支护参数拟定、中墙设计、施工工法选择、施工辅助措施以及监控量测等进行总结介绍,并应用有限元数值模拟方法对支护结构的强度及围岩的稳定性进行了模拟分析,为今后相关类似超大断面公路隧道的工程设计与施工积累经验. 相似文献
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国道210线铜黄一级公路上的楼子沟黄土隧道采用了新奥法(NATM)设计和施工,为其它黄土隧道采用新奥法的设计和施工提供了借鉴.通过对已建成黄土隧道近几年的运营,对黄土公路隧道施工等有关问题进行探讨. 相似文献
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文章结合隧道施工实践经验,分析了目前我国公路隧道设计与施工中存在的常见问题,从动态反馈设计、施工方法的变更、施工工序的变更、预留变形量的修正、设计参数的修正及信息化施工等方面探讨了隧道设计与施工的发展趋势。 相似文献
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金旗山小净距隧道施工技术要点 总被引:8,自引:0,他引:8
位于福建省京福高速公路上的金旗山隧道是一座典型的双线双洞、小净距公路隧道,其双洞中心线间距为17.519 m.文章以该隧道为例,介绍小净距隧道的洞身开挖和施工顺序以及中夹岩柱加固、锚喷支护、监控量测等关键工序的施工方法和技术要点,为小净距隧道设计与施工的工程类比积累了经验. 相似文献
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大跨黄土隧道设计与安全施工对策 总被引:2,自引:1,他引:1
作者根据多年的工程经验,对以往各线黄土隧道设计、施工和塌方情况进行总结和分析,结合郑西客运专线大断面黄土隧道的设计、施工情况,提出了大断面黄土隧道安全施工的对策,希望对拟建的包西、太中银等黄土隧道较多的铁路线有一定的参考价值. 相似文献
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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。 相似文献
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Caspar G. Chorus 《Transportation Research Part A: Policy and Practice》2012,46(7):1003-1012
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. 相似文献
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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。 相似文献
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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. 相似文献
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隧道及地下工程结构防排水技术的发展和应用 总被引:4,自引:0,他引:4
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. 相似文献
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