桥梁空心板预制气囊理论位置初探

结合工程实践着重分析了空心板梁板预制气囊＂跑模＂原因,提出了控制气囊理论位置的方法,指出气囊孔径小的梁板质量优于孔径大的梁板质量,两孔的圆形空心优于单孔的多边形空心板质量。     

3D多层圆管预制件的织制

3D多层圆管既可应用于产业用纺织品,又能以毛织物等形式作为民用.按管状织物的织造原理,从内到外织造内外层互相嵌套的3D多层圆管,织造时采用垂纱先行接结多层管,可以提高型材本身的牢度与减少树脂用量.以具有垂纱接结的3层圆管为例,详细介绍了内、中、外各层的织造顺序及垂纱的交织规律,概括总结了多层圆管织造的要点.     

大体积混凝土预制箱梁上拱控制措施

结合郑西客运专线大体积混凝土预制箱梁的施工实践，介绍了大体积混凝土预制箱梁上拱控制措施，施工实践证明，该控制措施是科学的、合理的和简便的，能有效地保证预制箱梁的质量。     

7 000 m3螺旋升降湿式气柜导轨预制工艺

通过对气柜导轨使用机理分析及近似曲率的计算 ,制定了预制导轨的新工艺 ,安装时与原工艺进行了数据比较 ,结果证明新工艺简便 ,导轨安装形位精度较高     

管道工厂化预制在连续重整装置的应用

对于大型石油化工装置,传统的管道施工方式存在现场施工技术难度大、施工质量不易保证及施工工期长等缺点。管道工厂化预制可以有效提高管道施工质量,缩短管道施工工期,减少高空作业风险。通过某连续重整装置大口径反应油气管道工厂化预制的实例,展示了管道工厂化预制的优势。通过工厂化预制,将393 m DN900铬钼合金钢管道分56个管段预制交货;预制对接环焊缝一次合格率97%;全部管段工厂化预制在45 d内完成;现场切割、焊接、检验、热处理等施工量减少近70%。最后阐述了管道工厂化预制在实施过程中应注意的问题,并强调需进一步完善相关设计、施工、验收标准,使石油化工装置管道工厂化预制规范化。     

管道工厂化预制技术在建筑机电安装中的应用

简要介绍了目前国内外管道化预制的现状,分别阐述了管道工厂化预制的流程模式和应注意的问题,并总结了管道工厂化预制的优势,指出管道工厂化预制技术应用前景广阔,是今后的发展趋势。     

青岛海湾大沽河航道桥钢箱梁大节段安装架设关键技术研究

以青岛海湾大桥为工程背景,详细讨论了钢箱梁制造加工、超重超长梁段的装船运输、大节段的吊装定位技术以及施工过程中加劲梁的线形控制等问题。研究和实践表明,超重超长大型钢箱梁在海边潮汐变化条件下跨越障碍滚装装船技术取得了成功;梁索结合式吊具方案,可适应多规格、偏心梁段的吊装需要,满足大节段钢箱梁吊装的技术要求;梁段的吊装及定位调整均达到了设计预期的精度要求。     

The effect of the quality-oriented production approach on the delivery of prefabricated homes in Japan

During the 1960s and 1970s, Japanese housingmanufacturers focused solely on the `massproduction' of their products, resulting in asupply of virtually identical, rathermonotonous houses. Due to the `inferior' imageassociated with the low-quality appearance ofthese houses, the public immediately rejectedthem. Since then, manufacturers have placedgreater emphasis on improving industrializedhousing quality, and thereby customersatisfaction, such that today Japanese housingmanufacturers enjoy a reputation for providingquality housing that, while stillmass-produced, is customized – i.e., `masscustomization'.In order to meet today's diverse demands forhousing, Japanese manufacturers apply a quality-oriented production approach in themanufacturing of industrialized homes based ona cost-performance marketing strategy,which considerably increases housing quality byproviding standard fittings. As a result,even though affordable homes are still ingreat demand, manufacturers have actually beensuccessful in producing and marketing more expensive high-quality homes. This studyexamines the effect of the quality-orientedproduction approach on the delivery ofprefabricated homes in Japan, and highlightsthe interrelationship between thequality-oriented industrialized productionmethod that, in theory, helps reduceproduction costs and the marketing strategiesaimed at maintaining relatively highretail housing prices.     

27m跨粮库屋架现场预制与安装技术

介绍了27m跨粮库屋架现场预制的安装工序和施工技术，从屋架的制作、张拉、安装几方面阐述了现场加工预应力钢筋混凝土折线型屋架、预应力大型屋面板的工程实例，并提出了一些施工要点。