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预应力槽瓦屋面结构,应用于中小型单层工业厂房,具有自防水效果好,自重轻,节省材料,经济指标低(表1),施工和吊装方便、屋面修补简便等优点。注.①表中指标分析均为15米跨、柱距6米的屋面结构。槽瓦屋面已包括脊瓦、盖瓦、封头板等附属构件。屋架或屋面大梁等承重构件均不包括在内。②单价中均不包括防水涂料层。如用6511涂料、应增加1.14元/米~2。③预应力槽瓦厚度已从23毫米增加到28毫米。但由于该屋面结构构件单薄,运输困难,容易产生裂缝,损耗较多,隔热性能较差等缺陷,推广应用受到一定影响。本文仅对改进以上缺陷提供一点经验,并对国家、省标准图和调查报告中的某些问题,提一些探讨性意见,对一般施工技术和构造等问题不再赘述。一、槽瓦屋面结构整体刚度问题
Prestressed slot tile roof structure, applied to small and medium-sized single-layer industrial plants, has the advantages of good self-waterproof effect, light weight, material saving, low economic index (Table 1), convenient construction and hoisting, and simple roof repair. Note.1 The indicators in the table are all roof structures with a span of 15 meters and a distance of 6 meters. Tile roofing has included attachments such as ridges, tiles, and headboards. Roofing or roofing beams and other load-bearing members are not included. 2 The unit price does not include the waterproof coating layer. If using 6511 paint, should increase 1.14 yuan / m ~ 2. 3 The thickness of prestressed slot tiles has been increased from 23mm to 28mm. However, due to the thinness of the structural components of the roof, the transportation is difficult, cracks are easily generated, the loss is high, and the heat insulation performance is poor, and the popularization and application are affected. This article provides only a little experience in improving the above defects, and provides some exploratory opinions on some issues in the national, provincial standard maps and investigation reports, and does not repeat the general construction technology and construction issues. First, the overall stiffness of tile roof structure