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| Implementation Procedure |
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- Casing pipe is positioned and predetermined quantity of filling material is charged into the casing.
- Casing is rotated and driven smoothly into the ground.
- Casing is fully penetrated to the designated depth.
- While casing is lifted by predetermined height, filling material is discharged from the casing.
- Casing is re-driven to compact discharged filling material and surrounding ground.
- Steps 4 and 5 are repeated by using a wave pattern and casing is gradually lifted, consequently formation of an enlarged pile is achieved.
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