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随着我国铁路建設事业的发展,沿线原用及技术作业房屋的修建任务日益增大,而这些房屋的屋盖系統以往均采用木結构,为了响应党的号召,大力节約木材,必须以鋼筋混凝土結构来代替木結构。专业設計院曾于1963年設計了适用于沿綫民用及技术作业房屋的全路通用图“鋼筋混凝土三角形屋架图集”,这种屋架的优点是节約木材;屋盖外形与惯用的木結构一致;受力性能較好,能充分发挥材料的强度。但也存在一些缺点,如模板較費,及运輸較困难,因而影响了这种屋架的广泛采用。为此,专业設計院在全路通用图“鋼筋混凝土人字屋架(房844)”的基础上,学习了北京市設計院的經骏,于1964年又設計了另一种屋架,即鋼筋混凝土三角形拱架(图1),现将其設計情况简介如下。
With the development of the railway construction in our country, the task of building original and technical work houses along the line is increasing day by day. In the past, the roof systems of these houses all adopted the wood structure. In response to the call of the party, Concrete structure to replace the wood structure. Professional Design Institute had in 1963 designed for civil and technical work along the line all-the-road map “reinforced concrete triangle roof Atlas”, this roof has the advantage of saving timber; roof shape and the usual wood structure Consistent; better stress performance, can give full play to the strength of the material. However, there are also some disadvantages, such as the cost of the template being relatively feeble and the more difficult to transport, thus affecting the widespread adoption of such roof truss. To this end, the professional design institute in the general map “reinforced concrete herringbone roof frame (room 844)” based on the study of the Beijing Institute of Design Chun, in 1964 and then designed another roof truss, that is, reinforced concrete Triangle arch (Figure 1), the design is now briefed as follows.