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安徽省合安线上修建了一孔跨径8公尺(拱度1/3.5)的石拱桥,是采用“土牛拱胎”来代替木拱架的,为国家减少了大量投资,降低了造价。兹介绍如下: 一、砌筑经过 1.制拱圈模板根据中央公路桥涵标准图,拱圈外国半径为5.10公尺,内国半径4.65公尺,先用松木方板(3×20×150-200公分)数块搭接联成拱弧形状,以洋钉钉牢置于平坦的地面上,依内国半径作出正面图,即在板上划出内园弧线,再沿弧线锯成拱形样板,
A square stone arch bridge with a span of 8 meters (camber 1 / 3.5) was built in He’an, Anhui Province. It replaced the wood arches with “soil ox mats”, reducing large investment for the country and reducing the cost . Here are the introduction: First, masonry After 1. Arch arch template According to the central highway bridge culvert standard map, the arch radius of 5.10 meters, the national radius of 4.65 meters, the first pine board (3 × 20 × 150-200 Cm) lap joint into several arch shape to nail the nail on a flat ground, according to the radius of the front to make a plan, that is drawn in the interior park arc, and then saw the arch along the arc Template,