| 摘要 |
PURPOSE:To enable work to be economically executed by preparing for the assembling yards of a small scale along a railway extension or a railway, and by executing the work of bridging on a hot line on a roadway. CONSTITUTION:In assembling yards arranged at fixed positions, the elevated bridge upper-section work sets 21 of bridge feet and upper structure which are integrally formed are assembled by block construction. Then, the work of underground beams 6 are previously executed on both horizontal side sections of a roadway, and on the underground beams 6, the elevated bridge upper- section work sets 21 are moved to specified positions in order by extruding construction, and are erected at the specified positions. Accordingly, for example, by every approx. 500-1000m, the assembling yards may be secured, and in an urban area or the like, the work of upright elevated bridges can be executed by hot line work to hardly effect the train service. |
