Construction Example Using V-Jet Method and Multi-Fan Method for Aseismic Reinforcement of Coal Quay in Service-Video

Video Transcription

Video Summary

The presentation describes ground improvement for deepening Sakata Port in earthquake-prone Yamagata, Japan, using V-JET and rigid multi-fan methods. V-JET creates large treatment zones, while the multi-fan method forms fan-shaped zones and was used near sensitive steel structures to limit effects from ground improvement. Quality planning included mixing tests to select the cement content needed to meet a 3 MPa strength target. Field sampling and elastic-wave measurements confirmed target properties, while cutting-sound monitoring and sonic prospecting checked treatment depth and diameter. The results generally matched design targets, and the presentation outlines measures to reduce ground pressure, settlement, and deformation.

Keywords

ground improvement

Sakata Port

V-JET method

rigid multi-fan method

earthquake-prone Yamagata