The New Technique of Railway Bridges in Hokuriku Shinkansen
By Hidetsugu Miyabayashi
Concrete Journal, Vol.34, No.9, pp.5�`11,Sept. 1996
- Synopsis
- Hokuriku Shinkansen's Takasaki-Nagano section is 117 kilometer long and it will bring a new service between Tokyo and Nagano in one and half hour. This article, I introduces three characteristic concrete bridges in this section. On constructing Kirizumigawa bridge, a prestressed concrete strutted beam bridge, two technical methods were adopted to control the effect against the environment : the lowering erection method for the slant piers and the cantilever erection method for the main girder. Daini Chikumagawa bridge, the first cable-stayed prestressed concrete bridge in Shinkansen, set up the record of the longest span of the concrete railway bridges (133.9 meters). Yashiro Minamiand Yashiro Kita bridges (main span : 105 and 90 meters each) are extradosed prestressed concrete bridges and this structural type can decrease the beam height of middle-size concrete railway bridges.
- Keywords:
- railway bridge, cable-stayed prestressed concrete bridge, strutted beam bridge, extradosed prestressed concrete bridge, lowering erection method, cantilever erection method
