The SY construction method(all casing enlarged pile construction method) is a new cast-in-place expanded pile construction method which can obtain a large supporting by enlarging the diameter of the enlarged portion to a maximum of twice the diameter of the shaft portion.( 4 times the bottom portion area )
Features of construction method
- Maximum expanded diameter φ4700mm.
- 4.0 times high support force.
- It corresponds to an economical design with an enlargement ratio of 4.0 times.
- Compatible with high strength concrete.
- Concrete design standerd strength up to 45 N/mm2).
- Even in narrow field.
- At the same time of a full circumference rotary excavator, it is possible to build an enlarged bottom pile without a ground drill machine.
- Reliable construction control.
- Manage reliably with the the mechanical limit function by the expansion wing restriction stopper.
- Proper bottom-of-sight ability.
- Confirm the height of the bottoming ability in the construction test.
- Confirmation of pile safety.
- Safety is confirmed by FEM analysis and 1/10 model destruction experiment.
- Confirmation of construction safety.
- Confirmation of construction safety by various construction experiments.
Construction procedures
Status of construction site
