Imaichi Dam is a gravity type and it has 190000m3 volumes. We used the excavated rock of underground power station and tunnels for aggregate. Main Dam is constructed by layer method. This report is to introduce about it's constructing.
Prestressed concrete flat beams combined with ribbed slabs are adopted in the construction of warehouse for Koshigaya whalesale center. Flat type duct anchorage for prestressing are developed and used for making tendons arrangement easy in small depth of flat beam, and for prestressing effectively to beam section. This report describes on the design and the construction of prestressed concrete flat beams, the test results of friction coefficients of flat type duct and measured results of vibration on beams and slabs.
Elevated railroad in service was repaired by shotcreting using ultra rapid hardening cement with steel fibers. The results shows that this method is an excellent method for repair. The outline of repair works including the quality of shotcreted concrete and the effect of this shotcreting method is described in this paper.