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随着高墩大跨连续刚构及连续梁桥的广泛应用,使得挂篮悬臂浇筑法成为此类桥梁建设的重要选择,而其0#段、边跨平衡现浇段以及中跨合龙段的施工方案的选择又是挂篮悬臂浇筑施工的重要组成部分.文章针对桥梁墩高达107 m的湖美溪大桥(82+150+82)m预应力混凝土连续刚构桥之0#段、边跨平衡现浇段以及中跨合龙段现浇施工托架、吊... 相似文献
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随着高速公路的快速发展,现浇预应力混凝土连续箱梁因线形美观、稳定性好而被广泛采用。文章以京承(北京至承德)高速公路红门川3#桥为例,介绍了利用满堂支架施工现浇预应力混凝土连续箱梁的施工工艺与流程,望对同类桥梁施工有所指导与借鉴。 相似文献
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连续预应力钢筋混凝土箱梁作为桥梁的上部结构,在公路桥梁工程中应用越来越广泛,为了解决项目复杂施工环境条件下的现浇箱梁施工,采用盘扣式满堂支架作为桥梁上部预应力钢筋混凝土连续现浇箱梁施工的临时结构,对满堂支架进行设计、分析及验算,总结施工技术要点及注意事项,供类似项目参考。 相似文献
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解清超 《中小企业管理与科技》2012,(1)
结合工程实例,着重阐述了预应力混凝土悬臂浇筑连续箱梁0#段采用支架现浇时支架的力学检算过程,经检算,各项指标均符合相关标准及规范要求。为今后类似桥梁支架现浇法施工提供参考。 相似文献
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在工程施工中连续箱梁、简支箱梁及边跨现浇直线段多采用支架现浇施工方式,施工方案一般采用梁柱式支架,该支架须设置卸架设备,采用砂筒作为卸架设备之一,根据当今桥梁现有施工经验,砂筒承载能力仅达50T;但现在桥梁设计及施工中经常会碰到大吨位的砂筒作为常用卸架设备。 相似文献
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某高速公路高架桥跨越河流部分为单箱三室结构悬臂箱梁,半幅设分离双柱式矩形墩柱,利用既有的承台,采用钢管及悬挑支架的方式,实现了0#块浇筑施工。该方案具有工期较短、承载力好,安全系数高,同时作为悬臂梁的临时固结,为同类桥梁临时支墩设计施工提供参考。 相似文献
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文章根据睢宁县文学路南路徐沙河大桥预应力混凝土连续箱梁桥的施工,详细介绍了钢筋配水箱对现浇梁支架进行预压的方法,该方法充分利用施工现场的钢筋进行加载,并利用钢水箱进行补充精确加载预压,加载方式可以尽量模拟箱梁恒载的实际布置,低碳环保,可为同类连续梁的支架现浇施工提供参考。 相似文献
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青荣城际铁路跨青银高速公路特大桥(48+80+48)m三跨变截面预应力混凝土连续箱梁,采用挂篮悬浇施工工艺,本文简明扼要的介绍了该梁0#块托架法现浇施工技术,对托架的设计、安装、预压、模板系统安装等工序进行了阐述。 相似文献
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Abstract . In 1895 a group of Single Taxers—members of the ethical democratic social reform movement founded by the American Journalist, Henry George—'invaded’ Delaware in an attempt, by concentrating their efforts, to achieve a demonstration of the efficacy of their theories by putting them into practice. The campaign won adherents but it failed to win adoption of the program because the idealists were not political realists and so they were unaware that Delaware in the mid-90s was a very unlikely place for a third-party movement. 相似文献
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民众或经济组织在进行资产投资时,主要是对资产的收益和风险进行分析权衡。本文旨在对单项资产投资的收益和风险损失进行探讨——即单项资产的收益率是否可以补偿该投资所可能产生的风险损失。 相似文献
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A bstract . Statements claiming that the single tax would raise insufficient revenue to support modern governments have been damaging to Henry George's proposal to tax the rent of land. It is argued that these claims are a misleading way of assessing George's proposal. Firstly, it is shown that estimates of rent usually understate the revenue that would have been raised under the single tax. Secondly, the idea of a counterfactual proposition is used to show that government expenditure would have been lower subsequently had George's proposal been adopted. The conclusion is that there are generally errors of omission in estimating the sufficiency of single tax revenue. 相似文献
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本文围绕防范风险、提高效益,对单项工程项目策划、实施准备、工程实施、结算支付四个业务阶段成本控制流程进行了探讨,通过整合工程项目、业务外包、采购业务、合同管理、资产管理、资金活动等六个主要业务领域,构建单项工程成本控制框架体系。 相似文献
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Josef Richter 《Economic Systems Research》1994,6(1):77-90
The economic consequences—global and on a sectoral level—of the full participation of Austria in the process of economic integration in Europe are assessed with the help of the INFORUM system of interlinked input–output models and the Austrian model in this family, i.e. AUSTRIA IV. The results of two scenarios up to the year 2000 are compared. One scenario is based on the assumption of the full participation of Austria in the process of European integration. The alternative scenario is based on the hypothesis that Austria has to remain in an outsider position. The analysis shows quite relevant positive consequences of full participation by Austria in the process of European integration. Because of compensating forces, the effects on a sectoral level are much more pronounced than those on the global level. The structural implications on output, employment, etc. are quite remarkable. 相似文献
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文章提出了用红外光电二极管、测量电路和频率计数器组成的新型测量单摆周期的自动检测计量仪,使传统经典实验充实了现代测量技术的新内容,从而有效地提高了用单摆测量重力加速度实验的实验精度。 相似文献