Example of Construction of Sheet Pile Walls for Anti-Seismic Reinforcement of Railway Embankment

抄録

A construction of anti-seismic reinforcement of railway embankment was performed near Hirai Station in the JR Sobu Line. The site was located in a densely populated residential area. The working space was limited to the width of the slope of the embankment. Each pile was cut by four and carried in by medium duty trucks for Koshin site. On the other hand, a storage space for pile materials was prepared in Hirai site by using L-shaped sheet pile walls and excavation. The standard press-in method was adopted for Koshin site in the preliminary design. But, since it was difficult to carry in additional equipment after press-in work had processed, it was decided to use a versatile machine, ECO400S, in preparation for the probable hard ground which consisted of buried and abandoned materials in the embankment. For Hirai area, at the first pressing-in for temporally sheet piling, at 30 cm below the surface of embankment, the pile was blocked by rubbles. As a result, crush pilers were used to construct both temporally and real structure of sheet pile walls.