煤气管道不宜附设在城市桥梁上部构造中王雪林（成都市市政公司）目前，在成都市市政工程建设中，作为它的附属工程──市政设施的各种管线（道）与污、雨水管道同步而行，特别是煤气管道在穿越河流时，笔者建议设计和规划单位的工程师们不宜附设在城市桥梁的上部构造中。... Gas pipelines should not be attached to the superstructure of urban bridges. Wang Xuelin (Chengdu City Municipal Corporation) Currently, in the municipal engineering construction of Chengdu City, as an ancillary project, all kinds of pipelines (channels) of municipal facilities are synchronized with the sewage and stormwater pipelines. In particular, when the gas pipeline crosses a river, the author suggests that the engineers of the design and planning unit should not be attached to the upper structure of the urban bridge. ...