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发明公开
CN102345386A 一种制造预应力钢筋混凝土屋架的方法 无效 - 撤回

一种制造预应力钢筋混凝土屋架的方法
摘要：
本发明公开了一种制造预应力钢筋混凝土屋架的方法，包括如下步骤：在混凝土灌装模内设置多组两两扣合的半圆形撑板，所述每组半圆形撑板之间插设用于支撑起两个半圆形撑板的横撑板；向前述混凝土灌装模内灌入混凝土；待混凝土初凝后、终凝前，转动横撑板以释放两个半圆形撑板，并将横撑板、两个半圆形撑板一并自混凝土灌装模中抽出；将上述混凝土静放至设定时间后脱模。本发明所述方法原理简单、施工方便，经济实用，解决了大跨度预应力钢筋混凝土折线形屋架在现场制作成孔的问题。
摘要（英）：

The invention discloses a method for manufacturing a prestressed reinforced concrete roof truss, which comprises the following steps that: a plurality of groups of semicircular supporting plates, every two of which are fastened, are arranged in a concrete filling mold, and a cross supporting plate for supporting the two semicircular supporting plates is inserted among each group of semicircular supporting plates; concrete is filled in the concrete filling mold; after the initial setting and before final setting of the concrete, the cross supporting plate is rotated to release the two semicircular supporting plates, and the cross supporting plate and the two semicircular supporting plates are pulled out of the concrete filling mold together; and the concrete is placed for set time, and then demolded. According to the method, the principle is simple, the construction is convenient, the method is economic and practical, and the problem of pore forming of the large-span prestressed reinforced concrete mansard roof truss in site manufacture is solved.

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