Building Pressed-in Pipe Pile Walls for Landslide Prevention-Video

Video Transcription

Video Summary

Takefumi Takuma of Geeken Limited described using pre-seam pipe-pile walls to prevent landslides along a new high-speed railway in Nagasaki, Japan. The project required several rows of large steel pipe piles installed on steep, unstable slopes to protect bridge piers. The piles, up to 43.5 metres long, were embedded 13–15 metres into bedrock and staggered to allow groundwater to pass between them.<br /><br />The piles were installed using the gyro-press method, which combines hydraulic pressing with rotation and cutting shoes to penetrate hard ground. Compared with impact or vibratory methods, pressing produces relatively little noise and vibration. A GRB system allowed equipment and piles to be transported and installed from atop previously installed piles, avoiding the need for extensive access roads on the steep slope.<br /><br />The presenter noted that exceptionally hard bedrock reduced production to about one pile per day, despite an expected rate of two to three.

Keywords

pre-seam pipe-pile walls

landslide prevention

high-speed railway

steel pipe piles

gyro-press method

bedrock installation