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地方交通建设在中小跨度的圬工拱桥施工中,行之有效的搭架施工方法,一般多采用满布式或人字斜撑木拱架;但因木材耗量大,使用劳力多,施工期也较长;使地方交通建设存在一定困难。七九年,我县在古桥濑溪河大桥拱架方案比较中,采用三铰桁式钢拱架比满布式木拱架节约投资30％以上,节省木材87％,劳力50％。该拱架八一年正式投入使用;现已先后使用于四座大中桥;目前其它有关单位正准备多次继续使用。
Local traffic construction In the construction of small and medium span arch bridge construction, effective method of construction of the shelf, the general use of more than cloth or herringbone arch wood arch; but due to heavy wood consumption, the use of labor and more, the construction period Also longer; make local transportation construction there are some difficulties. In 1979, in our county, comparing with the scheme of the arch bridge of the ancient bridge Seto River Bridge, it saves more than 30% of the investment by using the three-hinged steel truss arch bridge and saves 87% of wood and 50% of the labor force. The arch was formally put into use in August of this year; it has been used in four large and medium-sized bridges successively; at present, other relevant units are preparing to continue using it many times.