我市在修建龙凤山采石场轻便铁路时,曾修建一座1孔跨径8米的石灰沙浆砌乱石拱桥,茲将修建情况介绍于下: 这条轻便铁路长3.5公里,全部通过深山,有200米长隧道,大小涵洞10座,全部建筑物没有用一点水泥、钢筋木料等原材料,均系乱石干砌或石灰浆砌修成。这座1—8米的拱桥为1/3.5圆弧拱,净宽4.5米,全长18.40米,台高2.64米,(在干旱季节,桥下经常通行汽车),基础深1.8米,拱圈原50厘米,因系乱石,厚度不匀,护拱与拱圈部分砌成了整体,桥台与侧墙同时砌筑,没有明显分开,桥台砌好后,为等候砂浆硬化,停工七天才开始筑土牛拱胎。土牛底层采用当地砂土,分层(每层30厘米)填筑 When building the Longfengshan Quarry Light Rail Transit Railway, the city built a 1-hole limestone mortar stone arch bridge spanning 8 meters. The construction situation will be introduced as follows: This LRT is 3.5 kilometers long, all passing through the mountains, There are 200-meter-long tunnels, 10 culverts in size, and all the buildings are made of raw materials such as cement, reinforced wood and other materials, all of which are made of stone or stone mortar. The 1-8-meter arch bridge is a 1 / 3.5 arc arch with a net width of 4.5 meters, a total length of 18.40 meters and a height of 2.64 meters. (During the dry season, the bridge often passes by cars.) The foundation is 1.8 meters deep and the arch The original 50 centimeters, due to the Department of stoning, uneven thickness, arch and arch ring part of the whole puzzle, abutment and side walls at the same time masonry, there is no obvious separation, the abutment is built, waiting for mortar hardening, down to seven Talent began to build soil ox mate. Native cattle ground with the local sand, stratified (each 30 cm) to fill