共查询到20条相似文献,搜索用时 78 毫秒
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文章以某大跨双薄壁实心墩连续刚构桥工程为例,以施工最大双悬臂状态为研究对象,选取混凝土强度等级、墩高、壁厚、横梁个数、不对称施工荷载5个关键设计参数,分析了不同设计参数对大跨双薄壁实心墩连续刚构桥主墩施工稳定性的影响,为大跨双薄壁实心墩设计与施工提供参考. 相似文献
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薄壁空心墩一般设计于比较高的桥梁墩位中,施工难度较大。文章结合烟溪沟特大桥94m薄壁空心墩的施工实践,从空心墩模板设计、翻模施工工艺、施工要点及安全保证措施等方面阐述了翻模施工技术的具体应用,为同类施工提供参考。 相似文献
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文章以田坝特大桥下构翻模施工为例,论述了薄壁空心墩施工工艺及技术,阐述了薄壁空心高墩翻模施工的技术要点。 相似文献
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在公路桥梁具体施工环节,为了避免工程问题出现,提高实心墩工程的整体质量,对公路桥梁薄壁实心墩技术工艺要点进行分析,同时依托桥梁工程项目实例,探究该技术的操作要点,通过分析可以了解到在薄壁实心墩技术应用环节加强技术工艺的控制,对推进项目的开展有着重要帮助,希望给类似工程提供参考。 相似文献
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本文对南渡河特大桥水中墩施工中采用少筋混凝土薄壁沉井作为护壁结构,从施工设施、施工工艺方面进行了介绍。 相似文献
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文章针对目前高速公路沥青路面出现车辙和裂缝病害的问题,分析产生病害的原因,提出了利用不断变换行车道位置,恢复沥青路面的粘弹塑性,避免裂缝产生,延长路面使用寿命等解决高速公路车辙与裂缝的对策。 相似文献
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曲线梁桥由于其结构自身存在着弯扭耦合问题,因此其设计、施工及研究的难度比直线桥大得多。文章以某弯曲宽箱梁为依托工程,运用有限元软件AN-SYS建立简支曲线钢箱梁模型,对其空间受力性能进行分析,得出了其在自重作用下的应力状态和支座处剪力滞效应规律。 相似文献
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文章针对当前高速公路突发应急公共事件应急保障体系的现状,分析高速公路突发公共应急事件产生的原因,结合高速公路突发公共应急事件的特点,提出建设高速公路应急管理体系的原则和构想。 相似文献
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文章通过对美国产PQI-301路面无核密度仪的应用,介绍了其标定的具体方法及其对沥青路面施工过程中的碾压工艺的确定、压实度的测定及在路面离析情况分析中的作用。 相似文献
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加筋土挡墙因其良好的结构性能和低廉造价,在多个行业中应用较广。文章通过对一个条带式加筋土挡墙实例的分析,简要说明加筋土挡墙的设计方法,分析了地震荷载对挡墙稳定性的影响,论述了加筋土挡墙较好的抗震性能。 相似文献
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Build to order (BTO) is a supply chain disruption mitigation strategy. Whereas cost minimization is an operational objective, the goal of the BTO manufacturer is to maximize its profit by using pricing as its competitive decision-making strategy. In this paper, we study a BTO manufacturer who simultaneously determines its product prices and designs its supply chain network to maximize its expected profit under price-dependent stochastic demand. We propose an L-shaped decomposition with complete enumeration to solve for optimality and show that the expanded master problem remains convex programming, although the optimality cuts are quadratic inequalities. The computational results demonstrate that stocking up on differentiated components and allocating modules appropriately to meet realized demand is a resilient policy that sustains variations in demand. Furthermore, the pricing decision balances the expected revenue and expected operating cost with an increase in expected profit. The integration of pricing and operational planning results in a higher expected profit than by individual decisions. We also demonstrate that cost minimization may not provide the same level of profit if the manufacturer overestimates or underestimates its most profitable demand. 相似文献
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文章以南宁市白沙-友谊大道互通式立交为研究对象,介绍了其工程概况与地形地貌,并对其交通量进行预测分析,同时结合其立交功能定位阐述了该立交方案的选型设计思路,通过对互通式立交型式进行综合比选,推荐出了功能完善、造价低的互通方案,可为城市道路立交工程设计提供参考和借鉴。 相似文献
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Alan Gilbert 《运输评论》2013,33(4):439-467
Abstract Successful mass transit solutions are rare in poor cities. When they appear they are lauded across the globe and too often copied uncritically. The latest exemplar of such best practice is the ‘Transmilenio’ rapid bus system in Bogotá. The article describes its main characteristics and applauds the improvements that it has already brought to urban transport in Bogotá. Naturally, the system is not without its flaws and these need to be drawn to the attention of those who might copy the Bogotá example. This is particularly important at the present time when the jewel of Bogotá has come under surprisingly strong local criticism over its cost, its ownership structure, its decreasing effectiveness and, fundamentally, because it has failed to solve the transport chaos of Bogotá. There is a real danger that ‘Transmilenio’ will stagnate as its popularity declines and as demands for a metro increase. Given the strengths of the system that would be something of a disaster and, most certainly, not in the interests of the poor. 相似文献
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热管是一种通过工作介质反复相变来进行传热的高效换热元件,在各种工业领域广泛应用。通过对中外文献的分类整理,简单地阐述了热管的发展历史、工作原理以及主要优点,并主要介绍了热管技术在化工领域几个方面的应用。在此基础上探讨了热管技术最新的发展方向,认为高温热管和微型热管技术发展最快,数值模拟技术将在热管研究中发挥重要作用。 相似文献