Construction Technology Optimization Strategies for Expansive Soil Drilling-Water Well Drilling

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Aiming at the “spatiotemporal variability” of expansive soils, adopt a “three-stage construction method”:water well drilling rig

 

  1. Pretreatment stage:
    Advance dewatering (lower groundwater level by 2–3m) to reduce soil water content.
  2. Drilling stage:
    Use parameter combination of “low rotation speed (100–150r/min) + high drilling pressure (8–10kN)”.
  3. Well completion stage:
    Conduct cement-sodium silicate double-fluid grouting immediately after casing running.water well drilling rig