一、预应力混凝土槽瓦的调查报告四川省建筑工程局施工的项目中预应力混凝土槽瓦已推广使用一百多万平米。实践证明:槽瓦构造简单,施工方便,构件轻巧,节约材料,重迭生产,缩短工期。但也存在着容易破损、裂缝、渗水、盖瓦下滑、隔热差、耐久性等问题。盖瓦下滑问题在简阳工地和65厂工程中已基本上解决;隔热问题采 I. Investigation Report of Prestressed Concrete Slot Tiles Prestressed concrete slot tiles in the construction projects of the Sichuan Provincial Construction Engineering Bureau have promoted the use of more than one million square meters. Practice has proved that the construction of the slot tiles is simple, the construction is convenient, the components are light, the materials are saved, the production is repeated, and the construction period is shortened. However, there are also problems such as easy breakage, cracks, water seepage, slippage of the tiles, poor thermal insulation, and durability. The problem of glide in gew has been basically solved in the Jianyang site and the 65 plant project;