抄録
The authors have proposed a simple design method of the VD using PBD materials for horizontal drainage. This design method is the comparison of the required flow volume qA calculated from a Barron type equation and the drainable amount qV computed by solving simultaneous equation of the flow network. It was obvious that the measurement of flow quantity of the actual drain networks was important to prove the validity of this design method. Therefore, the flow quantity in the PBD network was measured in the PBD construction site of Osaka Bay area by applying temperature change of the flow water. As the results of this research, the followings were obtained;1) It was proved to be applicable to measure flow quantity in PBD material from the two sets of thermocouples inserted.2) As a result of observation, the measured value of the flow quantity in PBD was close to the predicted one especially for a vertical drain part. 3) It seems that the network of the vertical and horizontal PBD drain works effectively and consolidation is promoted smoothly. This means the use of PBD material as a substitute of sand mat might be practical for vertical drain method.
