变电站建筑承载重型设备屋面综合防水技术研究

发布时间：2018-06-06 13:16

本文选题：变电站屋面 + 设备基础　；参考：《东南大学》2015年硕士论文

【摘要】：重型电气设备放置于变电站屋顶的做法,可以节省大量空间,是建设节能、环保、智能、紧凑型绿色变电站的体现,有利于达到“两型一化”变电站建设的要求,符合国家绿色工业建筑的需求。这种功能区叠放布置的做法有着广阔前景,然而屋面防水问题一直没有得到妥善解决,导致该做法没有大规模推广。通过对龙马220KV变电站、云蒙220KV变电站和东明220KV变电站屋面防水技术的调研与分析,指出变电站建筑承载重型设备屋面渗漏的主要原因。本文以河北武强220KV变电站为工程背景,针对调研分析容易发生渗漏的主要部位和主要原因,着重对其屋面混凝土结构的抗裂性能、屋面建筑构造防水及细部节点防水进行研究与探讨。利用大型通用有限元软件MIDAS建立了计算分析模型,分别对施工阶段和使用阶段的河北武强220KV变电站屋面混凝土结构进行有限元分析,找出屋面应力集中及变形较大的薄弱部位。根据分析结果,设计阶段,通过增强配筋和优化构造钢筋的布置,增强屋面混凝土结构的极限抗拉能力；施工阶段通过调整混凝土配合比和改善混凝土施工方式,减少混凝土的收缩,以提高屋面混凝土的抗裂抗渗性能。为提高屋面复合防水层的防水性能,设计了6个试件进行“升温—淋水—静置”循环试验,通过温度变形分析,防水层(由下至上)采用“单组分聚氨酯涂料防水层+聚合物防水砂浆层+热塑性聚烯烃防水卷材层”的组合形式,相互间变形协调性能最好。同时,对屋面设备基础及预埋螺栓等细部节点部位进行深化设计,以确保屋面整体防水的可靠性；对主要防水层的施工方式进行优化,特别强调聚氨酯涂膜防水层、聚合物砂浆找平层和热塑性聚烯烃高分子卷材防水层相互之间的粘结处理方式以及施工间隔时间的重要性。最后,对本文的研究内容和主要成果进行了总结,从屋面混凝土结构的设计、施工和屋面建筑构造整体防水的设计、施工两个方面,提出变电站建筑承载重型设备屋面综合防水技术的改进建议。
[Abstract]:The method of placing heavy electrical equipment on the roof of substation can save a lot of space. It is the embodiment of energy saving, environmental protection, intelligence and compact type green substation, which is helpful to meet the requirements of "two types and one transformation" substation construction. Meet the needs of national green industrial buildings. This method of superposition of functional areas has a broad prospect, but the problem of roof waterproofing has not been properly resolved, resulting in no large-scale promotion of the practice. Based on the investigation and analysis of roof waterproofing technology in Longma 220KV substation, Yunmeng 220KV substation and Dongming 220KV substation, the main causes of roof leakage in substation building bearing heavy equipment are pointed out. Based on the engineering background of Hebei Wuqiang 220KV Substation, this paper focuses on the crack resistance of the concrete structure of the roof in view of the investigation and analysis of the main parts and main causes of leakage. The waterproofing of roof structure and detail node waterproofing are studied and discussed. The calculation and analysis model of the roof concrete structure of Hebei Wuqiang 220KV Substation was established by using the large scale general finite element software MIDAS. The weak parts of the roof stress concentration and deformation were found out by the finite element analysis of the concrete structure of Wuqiang 220KV Substation in Hebei Province. According to the results of the analysis, in the design stage, the ultimate tensile capacity of the roof concrete structure is enhanced by strengthening the reinforcement and optimizing the arrangement of the structural reinforcement, while in the construction stage, the concrete mix ratio is adjusted and the concrete construction mode is improved. Reduce the shrinkage of concrete to improve the crack and seepage resistance of roof concrete. In order to improve the waterproof performance of the composite waterproof layer of roof, six specimens were designed to carry out the cyclic test of "temperature rise, water leaching and standing", and the temperature deformation analysis was carried out. The waterproof layer (from bottom to top) adopts the combination form of "one component polyurethane coating waterproof mortar layer, polymer waterproof mortar layer", and the deformation coordination property among each other is the best. At the same time, the foundation of roof equipment and the parts of detail joints such as embedded bolts are further designed to ensure the reliability of the whole roof waterproofing, and the construction methods of the main waterproof layer are optimized, with special emphasis on the polyurethane coating waterproof layer, The bonding treatment between polymer mortar leveling layer and thermoplastic polyolefin polymer roll waterproof layer and the importance of construction interval. Finally, the research contents and main achievements of this paper are summarized, from two aspects: the design of roof concrete structure, the design of construction and the whole waterproof structure of roof building, the construction of the concrete structure, the construction of the whole waterproofing structure, and the construction of the concrete structure. Suggestions for improvement of comprehensive waterproof technology for heavy duty equipment roof of substation building are put forward.
【学位授予单位】：东南大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TU761.11

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