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相比于现浇式综合管廊,预制拼装综合管廊具有施工质量好、建设周期短、环境污染小等优点,正得到越来越多的应用。本文首先概述了国内外预制拼装综合管廊建设现状,介绍了预制拼装综合管廊的分类和特点。然后从预制拼装综合管廊结构受力性能、防水性能和施工工艺等方面总结了国内外研究现状,并介绍了典型工程案例。最后对我国预制拼装综合管廊的发展趋势作了展望。 相似文献
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《建设科技(建设部)》2018,(19)
本文阐述了国内外地下综合管廊的发展历程和现状,结合我国的智慧城市理念,对我国现有的预制拼装管廊的四种结构:预制拼装钢波纹管管廊、半预制混凝土管廊、节段拼装式混凝土管廊及叠合装配式混凝土管廊进行了总结,为设计出经得起工程和实践检验的预制拼装综合管廊提供思路借鉴。 相似文献
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传统地下工程的建设采用现浇施工,存在工序繁杂、施工效率低、施工质量难以保证等问题,发展地下预制装配技术是解决上述困难的关键。本文介绍了国内外预制技术在地下工程中的应用,研究了矿山法公路隧道的预制衬砌结构的接头构造、结构防水、结构分块设计等关键技术,提出了符合矿山法公路隧道的预制衬砌分块方案。 相似文献
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以霍永高速公路东段路面3标附属工程路缘(边)石标准化施工为例,详细阐述了路缘(边)石预制场标准化建设、预制、运输、安砌、养护一整套施工工艺,实践证明,附属工程路缘(边)石标准化施工是使施工效果达到内坚外美最科学的施工方法。 相似文献
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基于预制装配化的住宅热水地面辐射供暖系统是传统的地面辐射供暖系统和预制装配化技术在住宅项目上的集成。结合温州某项目工程实践,阐述了该套系统的地暖模块划分、各地暖模块中的水管布置等关键技术,并介绍了地暖模块在工厂预制中的要点。结果显示,该套系统能克服传统湿法作业的众多弊端,值得推广应用。 相似文献
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Yanmin YANG Ying XIONG Yongqing LI Xiangkun MENG Peng WANG Tianyuan CAI 《Frontiers of Structural and Civil Engineering》2022,16(10):1351
In this study, fire tests of four single-section scaled-down utility tunnels were conducted. By analyzing temperature and structural responses of the utility tunnel throughout the fire exposure, the effects on the fire behavior of two different construction methods, cast-in-situ and prefabricated, and of two different materials, ordinary concrete and full lightweight concrete, were explored. The results of the study showed that the shear failure of the cast-in-situ utility tunnel occurred at the end of the top or bottom plate, and the failure of the prefabricated utility tunnel occurred at the junction of the prefabricated member and post-cast concrete. As the temperature increased, the temperature gradient along the thickness direction of the tunnel became apparent. The maximum temperature difference between the inner and outer wall surfaces was 531.7 °C. The highest temperature occurred in the cooling stage after stopping the heating, which provided a reference for the fire protection design and rescue of the utility tunnel. The displacement of the top plate of the prefabricated utility tunnel was 16.8 mm, which was 41.8% larger than that of the cast-in-situ utility tunnel. The bearing capacities of the ordinary concrete utility tunnel and full lightweight concrete utility tunnel after the fire loss were 27% and 16.8%, respectively. The full lightweight concrete utility tunnel exhibited good ductility and fire resistance and high collapse resistance. 相似文献
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Prefabricated building components have been adopted in Hong Kong for over two decades for high-rise buildings. In the public sector, prefabrication together with standard modular design was introduced in the Housing Authority's public housing projects in the mid-1980s. Over the years, precasting techniques have significantly evolved in public housing projects. In contrast, prefabrication has only recently been adopted in the private sector. The aim of this paper is to examine the evolution of precasting technology in high-rise residential developments in Hong Kong, and then explore the technological influences in both sectors. A database of 179 prefabricated residential buildings was developed and detailed case studies of five residential developments were conducted. The findings revealed that a greater extent of prefabrication use over the years, in terms of precasting percentage by volume and types of precast elements utilised. Major prefabrication innovations, in both sectors, influenced the technological advancement in prefabrication in Hong Kong. 相似文献
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本文论述了预制节段逐跨拼装桥梁的发展、施工特点及节段梁的预制方法等。并结合上海市新浏河大桥工程重点介绍了预制节段梁的设计特点,采用架桥机实现逐孔拼装的施工方法、预应力新材料新工艺的应用,以及预制节段梁主要试验成果分析。 相似文献
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地下综合管廊包括干线型综合管廊、支线型综合管廊和缆线型综合管廊(简称缆线管廊),其中缆线管廊主要负责将市区架空的电力、通信、广播电视等缆线容纳至埋地的管廊中。近几年,地下综合管廊迅速发展,而国内、外研究主要集中在干、支线型综合管廊,对于缆线管廊的研究很少。本文结合国内形势,提出了缆线管廊的优势和建设时机的选择,探讨了缆线管廊在我国的应用前景,并结合国内、外工程经验,介绍了缆线管廊的一般设计原则以及缆线管廊主通道、工作井的几种设计方案,并提出了每种设计方案的适用情况,可供同类工程参考。 相似文献
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装配式建筑以绿色节能发展为理念,通过工厂制造和现场总装实现快速建造,正在被越来越多的项目应用。预制外墙板现场吊运拼装的接缝处容易出现渗漏水现象。本文结合工程实例,阐述预制外墙防水施工的工艺,分析得出材料防水、结构防水和构造防水共同应用能有效解决预制外墙的渗水问题,并在此基础上对外墙防水技术进行优化,提高装配式建筑质量。 相似文献
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建设施工使用的混凝土预制构件产品种类资源十分丰富,常见的有在地铁工程、西气东输工程等隧道施工中高精度钢筋混凝土盾构管片的使用,在城市桥梁建设工程中预制拼装节段梁的使用,在高速铁路施工过程中预制清水混凝土饰面板的使用等。随着建筑质量需求的逐渐提升,混凝土预制构件的质量已经成为建筑领域备受关心的问题。 相似文献