小管线附桥架设方法探讨

On Aerial Crossing of Small-Diameter Gas Pipeline by Virtue of Near Existing Bridge

天然气管道在跨越河流时，可利用附近的桥梁，依附于桥梁的结构承载重量架设。本文着重对小管径管线附桥架设方法探讨。附桥敷管大致有四种方案，一是敷管在桥梁预留孔内；二是敷管在专设承重构件上；三是利用桥墩架设；四是悬管在人行道下。对四种方案在安全、经济、施工管理方面比较说明，然后对热补偿问题进行了探讨。

In gas pipeline aerial croning over river,it can ben attached to near existing bridge withappropriate structural load-supporting capability. This paper introduces four kinds of small-diameterbility,economy,construction and management,discusses thermal compensation.