论文部分内容阅读
一、前言我县于七三年在漳卫河左岸共修建排水涵洞九座,其结构型式为钢筋混凝土园涵,孔径1.5米,排水流量1.5～3.2秒立米,折合单管洞身总长445米,总投资30万元。七四年汛前,对所有涵洞进行了检查,发现洞顶均出现纵向(顺水流方向)裂缝,其宽度为0.4～1毫米,到七六年已发展到0.5～1.5毫米。
I. Preface Our county built a total of nine drainage culverts on the left bank of the Zhangwei River in 1993. The structure type is reinforced concrete garden culvert with a hole diameter of 1.5m and a drainage flow rate of 1.5 to 3.2seconds, equivalent to a total length of 445m , A total investment of 300000 yuan. Before the flood season of 1974, all the culverts were inspected and cracks in the vertical (along the water flow direction) were found on the top of the culvert. The width of the culverts was 0.4-1 mm and reached 0.5-1.5 mm by 1976.