共查询到19条相似文献,搜索用时 702 毫秒
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文章结合广西信都至梧州高速公路二期工程半圆形大直径钢波纹管涵工程实例,介绍了钢波纹管涵的优点,分析了钢波纹管涵施工工艺方法,总结了钢波纹管涵洞施工控制要点,为今后公路工程项目钢波纹管涵洞施工建设提供参考。 相似文献
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文章简要介绍了毕威高速公路填方路基段钢波纹管涵与盖板涵的经济性分析,并总结了钢波纹管涵应用的经济和社会效益。 相似文献
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介绍利用Visual Basic工具开发研制波纹管换热器的计算机辅助设计软件系统的总体框架,功能和方法,该软件采用ActiveX Automation技术顺利实现波纹管换热器的设计计算与辅助绘图的一体化。 相似文献
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为解决上海长江隧道超大型盾构的壳体金加工难题,自行研制了大型盾构专用车镗铣设备。介绍了该设备的研制要求、设计方案、主要部件的结构、设备制造安装精度控制措施和实际应用效果。该设备的研制成功,为我国盾构掘进机产业化提供了大型金加工设备。 相似文献
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中小型压实机械在公路养护中的作用 总被引:1,自引:0,他引:1
文章结合当前公路养护实际,介绍了江苏骏马压路机械有限公司生产的中小型压实机械产品的功能、特点及技术,并对该系列产品在公路养护中的作用进行了阐述。 相似文献
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In this paper, the waste heat of exhaust gases and jacket cooling water in marine diesel engines are analyzed to operate the absorption refrigeration unit (ARU). Thermo-economic and environmental analysis of the absorption refrigeration cycle operated with the two heat sources that use lithium bromide as an absorbent is carried out. The analysis is performed using Engineering Equation Solver (EES) software package where the thermodynamic properties of the steam and the LiBr-water mixtures are provided. The used EES code is verified by published experimental data. As a case study, high speed passenger vessel operating in the Red Sea area has been investigated. The results show that a considerable specific economic benefit could be achieved from ARU jacket cooling water operated over that gained from main engine exhaust gases. Environmentally, applying ARU machine during cruise will reduce the annual fuel consumption for the diesel generators by 156 ton with a reduction percentage of 23%. This will reduce the exhaust gas emissions by 6.3% from the applied main engine emissions. In addition, this will result in reducing NOx, SOx, and CO2 emissions with cost-effectiveness of 4.99 $/kg, 13.18 $/kg, and 0.08 $/kg, respectively. 相似文献
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为了保证管线正常运行的情况下对管道进行迁改,与阀门联箱配合使用,设计了一种带压开孔机.该设备采用轻质合金,主轴采用二级手动进给设计,中心钻刀刃上方设计有一段螺纹,将电机和法兰盘组合设计.文中设备质量轻,进给快速平稳,结构紧凑,维护方便. 相似文献
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In this work we propose a mechanism to optimize the capacity of the main corridor within a railway network with a radial-backbone or X-tree structure. The radial-backbone (or X-tree) structure is composed of two types of lines: the primary lines that travel exclusively on the common backbone (main corridor) and radial lines which, starting from the common backbone, branch out to individual locations. We define possible line configurations as binary strings and propose operators on them for their analysis, yielding an effective algorithm for generating an optimal design and train frequencies. We test our algorithm on real data for the high speed line Madrid–Seville. A frequency plan consistent with the optimal capacity is then proposed in order to eliminate the number of transfers between lines as well as to minimize the network fleet size, determining the minimum number of vehicles needed to serve all travel demand at maximum occupancy. 相似文献