Rotary Drilling Rig Support Package
A slurry parameter package matched to rig model and bucket conditions — 22% faster hole completion per pile.
Solution overview
- Application methods
- 旋挖灌注桩施工
- Problem type
- Equipment support
Scenario and construction challenges
Rotary rigs working interbedded pebble and soil: viscosity and carry must match bucket type and rotation speed to cut cuttings fall-back and collapse.
Challenge 1Cuttings fall-back
Weak carry lets cuttings drop back to the bottom when the auger is pulled.
Challenge 2Bit balling
Too much viscosity balls up the bucket and slows discharge, cutting efficiency.
Challenge 3Bottom sediment
Poor clean-out leaves sediment too thick and hurts pile quality.
Complete solution
Each scheme pairs materials with dosing; the table below lists material, role and ratio per step.
| Stage | Material | Function | Ratio / dosage | Working condition | Scope |
|---|---|---|---|---|---|
| Match | PAM-P | Viscosity by bucket type | 1:300 | Interbedded pebble/soil, bucket 0.8–1.5 m³ | Rotary rig drilling |
| Density tune | BENT-N | Adjust slurry density | 6% | Slurry density running low | Rotary circulation density adjustment |
| Purify | PAM-POOL | Mud-pond clarification | 80–150 g/m³ | High solids load in the mud pond | Rotary slurry circulation clean-up |
| Maintain | Compound top-up | Tune with pile depth | As required | Pile depth >40 m with long circulation | Depth-based top-up |
Delivered results
Construction schematic & site photos
Use the schematic and site photos to follow the process and slurry flow; final parameters follow on-site trial results.
Construction schematic
Site photos
Related cases
Southwest · Bridge pilesPile drilling through pebble strata: 100% hole acceptance
Main-pier piles of a major bridge in Southwest China crossed deep pebble beds with stones over 800 mm. Φ1500 holes shrank to Φ1380, blocking cage installation, and bottom sediment ran thick — more than 4 clean-out passes per pile.
Project scaleMain-pier piles at Φ1500 mm through pebbles over 800 mm
Northwest · Bridge pilesBoulder-strata pile walls in Northwest China: 98% wall stability
A bridge foundation in Northwest China crossed boulder beds. Large stones violently disturbed the walls — collapse and spalling were frequent, and heavy waste slurry forced constant pond clean-outs.
Project scaleBridge piles through boulder beds with large stones and severe wall disturbance
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