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简单梁式木桥是桥梁建筑中结构最简单的一种,跨径长度最长可达10米。由于公路建设过去所得到的木材规格有限,粗细不一样,短材居多;因此,在公路上目前很少见到修建8至10米的简单梁式桥,通常跨径只有5至6米。在宽阔的河流上,跨径小,出现墩架密立,流水断面缩小;一到洪水季节,上游如有漂浮物顺流而下,这些墩架将挡住水上飘浮物堵塞桥孔,构成墩架前集中冲刷,影响到墩架的稳定,也是造成木桥水毁原因之一;同时,排架多既不经济,而
Simple beam type wooden bridge is the simplest structure in the bridge construction, span length of up to 10 meters. Due to the limited size and thickness of the timber obtained in the past from road construction, there is a shortage of short materials. Therefore, it is seldom seen on the roads to construct simple beam bridges of 8 to 10 meters in length, usually only 5 to 6 meters in span. In the wide river, the span is small, the pier frame stands densely, and the cross section of the water flow narrows. When the flooding season reaches the flood season, the upper part of the pier will block the bridging hole and form the front of the pier Concentrated erosion, affecting the stability of pier frame, but also caused one of the reasons wooden bridge destroyed; the same time, the rack is not much economic, and