The S Y method is a new cast-in-place concrete expanded pile construction method that can obtain a large supporting force by enlarging the diameter of bottom part by more than twice that of hole diameter.
( Excavating up to 4.84 times than the bottom part area )
Features of the construction method
- Maximum expanded diameter φ4700mm.
- 4.48 times high support force.
- Expand the enlargement ratio form the conventional 3.2 times up to 4.84 times.
It corresponds to economical design. - Compatible with high strength concrete.
- Concrete design standard strength up to 45 N/mm2.
- Even in narrow field.
- A mechanicl mechanism with a maximum inclination angle of 16° miniaturizes the enlarged bucket. Compatible with small excavator and reaction equipment.
- It works well with all casing.
- Drilling on the bottom can be done with full circumference rotary excavator and reaction equipment.
- Reliable construction control.
- Manage reliably with the mechanical limit function by the expansion wing restriction stopper.
- Proper bottom drilling ability.
- Check the height of bottom drilling in the construction test.
- Confirmation of pile safety.
- Safety is confirmed by FEM analysis and 1/10 model destruction experiment.
- Confirmation of construction safety.
- Cheek and confirm the construction safety by various construction experiments.
Construction procedures
Status of construction site
