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京城家居界一直是一个让商家垂涎的大蛋糕,北京家居市场之间激战正酣。据北京建材市场协会提供的数据显示,北京现有家居建材市场300多家,销售经营面积超过80万平方米,其中1万平方米以上有30多家,5000平方米以上有50多家,三分之一经营良好,三分之一勉强维持,还有三分之一濒临倒闭,京城家居市场正在进行新一轮的洗牌。 相似文献
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《建设科技(建设部)》2003,(10)
2003美国污水处理展览会 举办时间:2003年10月11—15日 举办展馆:美国洛杉矶会议中心 主办单位:USA:Water Environment Federation(美国水环境联盟) 展出产品:污水净化设备、污水处理技术、污水处理系统、污水回收利用技术、污水回收利用设备、自动化控制、水环境保护技术和措施等。 第七届北京国际工程机械展览与技术交流会 举办时间:2003年10月14-17日 举办展馆:全国农业展览馆 主办单位:中国工程机械成套公司、中国国际贸 相似文献
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■拖欠,人们日常生活中一件令人烦恼的琐事,如今在全国建设领域凸现—拖欠工程款和农民工工资。而且,已经形成一种极为恶劣的风气。■令人惊诧,在这一股“拖欠风”里,政府投资项目的工程款拖欠,数字惊人,尤其引人注目。而且,涉及面广,时间之长,史无前例。■一条曲曲弯弯绵绵长长的“拖欠链”,构成了一座神秘莫测的迷宫。“拖欠链”之首是业主。政府项目的业主无疑就是政府及其有关部门了。“拖欠链”中间环节上的施工企业,被“拖”得陷入困境。而处于“拖欠链”末端的农民工,则被“拖”得基本生活也难以得到保证。■政府为工程款拖欠付出了沉重的代价。■如何在清理工程款拖欠工作中重塑政府诚信形象,已经成为人们关注的一个焦点。 相似文献
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建筑起重机械是建筑工程施工中必不可少的关键设备,我国是建筑起重机械生产和使用大国,也是建筑起重机械事故多发的国家,多年来建筑起重机械是各级管理部门的管理重点. 相似文献
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《Planning》2019,(6):99-100
总结了全球化背景下安徽省民族传统体育发展的困境,提出了推广和普及安徽省民族传统体育的有效途径和措施:加强与大众传媒结合、整合民族传统体育文化、学校积极开设民族传统体育课程、积极推广到社区健身中、民族传统体育融合旅游产业发展等。 相似文献
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《The IES Journal Part A: Civil & Structural Engineering》2013,6(3):127-150
The new 55,000-seat National Stadium is the centrepiece of the Singapore Sports Hub project due to be completed in mid-2014. The stadium features bowl cooling to all spectators as well as the 30,000-seat lower tier being able to be reconfigured and moved to transition from football to athletic and cricket modes. The roof is a highly efficient dome spanning 310 m with a rise of 85 m from the ground level. The fixed roof dome structure will be the largest dome roof in the world covering a stadium and also supports a symmetrical movable roof in two halves. The fixed roof dome structure is formed by a series of arch shaped steel trusses varying in depth from 5 m at the centre to 2.5 m at the base and a post-tensioned concrete ring beam support. These trussed arches are constructed from circular hollow section elements and span in multiple directions and cross the roof opening to form a highly efficient braced dome structure. To manage the design of such a huge multi-element structure, Arup used advanced parametric design software as well as in-house software specifically developed for the project to optimise and exchange information between architect and engineer, and then to fabrication. As well as Arup designing the structure, a second Arup team was engaged by the steel subcontractor to carry out highly complex and challenging connection design. The structure forming the roof is exposed architecturally with the roof having no ceiling or cladding on the underside, meaning that the structural sections and form of the connections are important architecturally as well as structurally. The circular hollow sections used to form the trusses and the truss forms themselves ensure clean and elegant lines within the structure. Due to the movable roof there is a varying load on the structure and fatigue needed to be considered. While the structure is not highly fatigue sensitive, fatigue needed to be carefully considered in the design and form of the connections to ensure that it did not become governing in the design or the structural members. This paper focuses on the architectural concept development, the fixed and movable roof design as well as the post-tensioned concrete ring beam support structure. The paper also describes an exercise to investigate the potential savings in material use that could have been made if higher strength, high elongation steel had been economically viable and could have been competitively tendered. It is shown that it could be possible to make a significant saving on element steelwork if either hot finished Niobium grain refined S500 or S690 could be adopted for similar projects in the future. 相似文献
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国家残疾人冰上运动比赛馆建设项目是2022冬奥会的重要配套项目,本工程致力于建造国际一流的无障碍设施样板工程,为残疾人提供方便实用的体育运动场所.观众区域是本场馆的人员集中区域,观众区域空调形式为全空气系统,在每个座位的下部设置送风口,送风口与送风管道连接,通过组合式空调机组集中送风.但原设计方案静压箱为钢筋混凝土现浇... 相似文献
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在田径场罩棚的设计中,选择什么样的结构形式,采用多大的风载体型系数及其抗震设计等都是设计人员深为关心的问题。因为罩棚的自重和屋面作法都比较轻,对风荷载比较敏感,结构形式又比较特殊,为求得罩棚的风载体型系数,目前国内外大都采用风洞模型试验的方法。 本文介绍了几种罩棚的结构形式,对罩棚的风洞模型实验结果进行了分析,并介绍了本工程田径场罩棚的抗震计算及其构造要点。 相似文献