1. The diameter and depth of cast-in-place pile holes must comply with design requirements.
2. Sediment at the bottom of cast-in-place pile holes must be cleaned. Thickness of sediment after cleaning: for piles primarily relying on friction, it must strictly not exceed 300 mm. For piles primarily relying on end bearing, it must strictly not exceed 50 mm.
3. Concrete for cast-in-place piles must be placed continuously; interlayers and broken piles are strictly prohibited. The actual volume of concrete placed in each hole must strictly not be less than the calculated volume.