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国家速滑馆工程大跨度马鞍形单层正交索网,是目前世界上类似结构中跨度和规模最大的索网结构,其拉索数量多、内力大,均采用双索设计,且拉索提升张拉过程中支座水平可滑动,索网提升、张拉施工难度大.针对这一技术难题,本文提出了"定长拉索地面编网、承重索整体提升、稳定索张拉成形"的总体施工方案和定长索安装理念,通过全过程施工仿真分... 相似文献
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郑州奥体中心体育场屋盖采用了大跨度索承网格结构,索系包含了径向索和环索。按以往经验,索网结构部分的施工与钢结构部分的施工要统筹考虑,施工过程中的胎架布设、索夹滑移等因素会对索网结构最后的成形及结构内力等产生很大影响。为此,制订了合理的施工张拉方案,并提前通过施工过程模拟分析来保证结构满足设计要求的形态,取得了良好的施工效果。 相似文献
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《四川建筑科学研究》1988,(3)
四川省体育馆悬索屋盖是我国第一座采用钢筋混凝土大拱与索网组成的大跨度轻型屋盖。该工程由中国建筑西南设计院设计,由四川省建三公司总承包。该工程造型新颖,但大跨度索网屋盖施工技术难度大。四川省建研院结合该索网结构特点开展了张拉工艺、锚具、索力与索网标高 相似文献
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单层双向正交索网结构是由两个方向的正交拉索组合而成的索网体系,其成型过程与约束形式、成型方法等密切相关,需要通过大量仿真计算分析来确定成型方法.国家速滑馆屋盖是由单层双向正交马鞍形索网、环桁架及幕墙索组成的组合结构体系,结构跨度为124 m×198 m,是目前世界上最大跨度的单层双向正交索网结构.为了制定行之有效的施工方案,采用有限元软件MIDAS/Gen,对该索网结构的施工过程进行了详细的仿真计算分析,对多种成型方法进行了比选,并对不同的支座约束形式进行了计算分析,最终确定了"地面组装索网,承重索整体提升,稳定索同步张拉"的施工方法.对该施工成型方法进行了全过程仿真计算分析,成型过程中支座仅承受竖向力,配重挂完后,进行支座锁死.计算结果与实际监测结果的对比分析表明:采用该索网成型方法不仅可以保证结构成型状态满足图纸要求,而且可以确保施工过程的安全可靠. 相似文献
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印度尼西亚全运会主体育场预应力钢结构施工技术 总被引:1,自引:1,他引:0
该体育场是印度尼西亚2008年全运会主体育场,屋盖采用预应力斜拉网格结构。通过Midas/Gen软件分析得到设计张拉索力,并且对施工过程进行了详细的施工仿真计算分析。介绍钢结构安装、预应力拉索安装及张拉等施工过程。根据工程特点,提出对同一根柱子采用前后拉索同时张拉的施工方法。并对张拉过程中钢结构应力、拉索索力、结构竖向变形等进行施工监测,结合施工仿真计算结果,提出了监测结果的合理性和正确性。 相似文献
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通过介绍两项工程的基坑支护施工的实例,根据不同工程的特点和地质情况,针对不同情况采取因地制宜的围护施工技术。 相似文献
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Henry A. Odeyinka 《Construction Management & Economics》2013,31(5):519-524
One of the major methods of managing construction risks in the Nigerian construction industry is the insurance method. On the basis of data from some selected construction sites in Nigeria, this paper evaluates the effectiveness of the method. Also it identifies, through a questionnaire survey, the various insurable construction risks perceived to be encountered in the Nigerian construction industry and the types of insurance policy employed in managing them. High importance is placed by the construction industry on site security, construction risk, and health and welfare requirements, and the use of an all-risk insurance policy is the most prominent method for managing the identified risks. Finally it is concluded that there is a correlation between insured sum and actual replacement cost when there are losses or damages. However, the insurance claims settled could cater for only 61.1% of the replacement cost of on-going construction works studied. 相似文献
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Graham M. Winch 《Construction Management & Economics》2013,31(7):807-817
This paper addresses the ‘innovativeness’ (the extent to which the design of the organization facilitates or inhibits innovation) of French and British project organizations. Following a review of the literature on organization design and innovativeness, data from a comparative organizational assessment of the British and French approaches to managing the Channel Tunnel construction project by Transmanche-Link are presented. These show that the British approach could well have less capacity for innovation than the French. The available evidence on the relative levels of innovation on the two sides of the Channel Tunnel are reviewed, showing that the predicted effects are found. 相似文献
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黄如福 《土木建筑工程信息技术》2011,3(1):102-107
本报告简要地介绍了日本大成建设集团有限公司,企业信息化建设经历,企业管理信息化建设方面取得的主要成果,企业信息化建设的主要推进策略以及今后的信息化建设重点。 相似文献
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Khaled El-Rayes Ramaneetharan Ramanathan Osama Moselhi 《Construction Management & Economics》2013,31(3):201-210
A practical object-oriented model for the planning and control of housing construction is presented that can generate efficient schedules and determine the time and cost performance of a housing project at three levels: (i) entire project, (ii) particular housing unit and (iii) an individual subcontractor. The model comprises five major components: (1) input module, (2) scheduling module, (3) database module, (4) control module and (5) reports module, and incorporates 18 classes that are designed to address the main requirements in planning and control of housing construction. The model is implemented as a user-friendly prototype software system using Visual C++ 6.0 and Microsoft Foundation Class (MFC). The prototype software is named ‘Residential Planner’, and runs in Windows 2000 and NT. An example of an application is analysed to illus8 trate the use of the developed model and demonstrate its practical features. 相似文献
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建筑施工中的环境污染问题与防治措施 总被引:2,自引:0,他引:2
文章结合建筑业可持续发展思想和绿色施工的概念,归纳了建筑施工过程中存在的种种污染源,包括噪音、泥浆、灰尘、废弃物、安全等方面,进而针对各种施工污染,提出了一些解决的措施和办法,为施工企业推行绿色施工提供了借鉴。 相似文献