共查询到19条相似文献,搜索用时 140 毫秒
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箱涵变形缝水密性检测 总被引:1,自引:1,他引:0
通过箱涵变形缝水密性检测的技术标准及检测目的 ,对变形缝水密性检测的具体过程进行总结 ,分析压力下降、补充水量的原因 ,使渗漏的变形缝通过注浆技术处理后达到设计、使用标准。 相似文献
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介绍了建筑幕墙水密性能的分级,对稳定加压法和波动加压法的检测步骤以及检测中的注意事项作了详细说明,分析了实际应用中暮墙常见的水密性问题和解决方法.并介绍了某大楼全隐框玻璃幕墙的稳定加压检测方法. 相似文献
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幕墙的水密性能是幕墙设计施工的重要内容之一.本文对玻璃幕墙水密性的原理、结构设计及功能设计等方面进行了详细地阐述,从而保证了玻璃幕墙的水密性能. 相似文献
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本文主要介绍了OVM250拉索体系产品的水密性试验研究情况,通过对国际三大斜拉索规范PTI2007、fib2005和CIP2002对斜拉索体系产品水密性的试验要求的对比,结合钢绞线斜拉索的实际使用工况,综合考虑了fib2005和CIP2002两大规范对拉索产品水密性试验要求,各种试验参数取两大规范中的高要求,试验水压参数按fib2005要求的3m水压,试验装置按倾斜30度安装和试验周期6个星期按CIP2002规范。因国内外有资质的实验室没有相应的试验设备,OVM公司按确定的试验参数及CIP2002规范试验安装要求设计加工了试验装置并配套试验设备,在国家建筑工程质量监督检验中心及美国CTL实验室的双重见证下进行了水密性试验,并圆满成功,该水密性试验充分验证了OVM250钢绞线拉索锚具的密封可靠性。 相似文献
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J. M. Pérez-Bella B. Rodríguez-Soria J. J. del Coz-Díaz E. Cano-Suñén A. Navarro-Manso 《Building Research & Information》2013,41(6):706-721
Watertightness tests for building facades attempt to simulate the most relevant climatic exposures for water penetration by reproducing standard conditions. Such conditions do not represent all possible climatic exposures, hence a new method was recently presented that relates test severity to watertightness performance of a facade under any operating conditions. In addition, test conditions vary for each regulatory framework (i.e. the results generated for one test cannot necessarily be extrapolated to other tests). A process is presented for considering the influence of exposure time. This allows a comparison of the severity of the conditions imposed by different watertightness tests independently of the exposure parameters. This comparison, which is based on a performance criterion, can enable a global certification of watertightness of any facade design under any operating conditions using results from only one watertightness test. The method developed herein was applied to facades under various operational conditions at a reference location, comparatively evaluating the conditions recreated by different international watertightness tests. The results suggest that American tests are more appropriate for recreating high climatic exposures, while European tests are more suitable for evaluating moderate and protected conditions of wind-driven rain and wind pressure. 相似文献
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以现行国家标准<建筑幕墙气密、水密、抗风压性能检测方法)GWr 15227-2007为依据,对建筑幕墙水密性能波动加压法检测中存在的一些问题进行了研究.通过对目前检测市场上采用的几种检测系统进行比较,分析了各自的优点和不足,并在借鉴几种检测系统优点的基础上,提出了双供风波动系统的设计方案,为建筑幕墙检测系统的设计提供参... 相似文献
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阐述了地暖的概念、原理和地面构造。并通过对地暖设计、施工、检验和调试各阶段进行探讨:分别从热负荷计算、加热管系统设计、地暖系统工程做法的选择、伸缩缝及防水层做法、施工前、施工中、施工后、水压试验和试运行等方面分析了地暖应注意的要点,为地暖的设计和应用提供了参考。 相似文献
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粉煤灰混凝土在隧道衬砌中应用的实践与思考 总被引:1,自引:1,他引:0
通过对隧道渗漏水原因的分析,针对隧道衬砌混凝土的开裂和耐久性问题,根据粉煤灰混凝土和易性好、水密性好、水化热低、膨胀收缩小、长期强度高的特点,对粉煤灰混凝土应用于隧道衬砌中进行了试验研究。 相似文献
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通过试验对比了盾构隧道防水用聚氨酯弹性体和水膨胀橡胶的材料性能(包括硬度、膨胀率和质量变化率)和防水能力的差异,分析了其原因并对设计施工提出了建议. 相似文献
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为消除伸缩缝处的安全隐患,建立经碰撞试验验证的有限元仿真模型,对大跨径伸缩缝处事故形态进行分析,提出伸缩缝处的护栏结构并进行安全评价.对于这种组合式护栏的计算和试验,结果表明:仿真计算与碰撞试验结果一致,误差在15%以内,可作为分析评价伸缩缝处护栏安全防护性能的方法;时速100km/h、重1.5t的小客车和时速为65km/h、重22t的大货车碰撞伸缩缝护栏后,能够平稳驶出且恢复到正常行驶姿态,驶出角度分别为9°和0°;小客车车体X、Y、Z三方向加速度最大值分别为13g、17.8g和10.2g;护栏最大动态位移为200mm.伸缩缝护栏各项指标均满足评价标准要求,可有效消除伸缩缝处的安全隐患. 相似文献
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In this paper, the effects of segmental joints, dimensions of segments, and ground conditions on buckling of the shield tunnel linings under hydrostatic pressure are studied by analytical and numerical analysis. The results show that radial joints have significant impacts on the buckling behavior: the shield tunnel linings with flexible joints buckles in a single wave mode in the vicinity of K joint, while those with rigid joints buckles in a multi-wave mode around the linings. Hydrostatic buckling strength is found to increase with the flexural rigidity of the radial joint and the thickness of segment increasing. This study shows that ground support increases the buckling strength dramatically, while earth pressure reduces the capacity to resist hydrostatic buckling. The tunnel linings during construction are found to be easier to buckle than that during operation. Meanwhile, the buckling of tunnel linings is studied by theoretical analysis of buried tube buckling. 相似文献