Settlement risk of water well drilling RIGS in soft soil layers and foundation reinforcement strategies

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When working in soft soil layers, the top enemy for water well drilling rig is the subsidence problem. The high compressibility and low bearing capacity of soft soil make the rig easy to sink under its own weight and construction loads. This not only affects the construction progress but may also cause safety accidents like equipment overturning.

 

To address this challenge, foundation reinforcement is key. Here are the main methods:

  1. Replacement Method: Excavate the soft soil and replace it with materials like gravel and sand. These materials have good water permeability and high strength, forming a stable bearing layer.
  2. Sand-Gravel Pile Method: Create sand-gravel piles in the soft soil through vibration or impact. This compacts the surrounding soil and improves the foundation’s bearing capacity.
  3. Laying Steel Plates or Subgrade Boxes: This is a common measure to disperse the rig’s load, reducing the pressure on the soft soil foundation. For example, after a construction site laid steel plates, the rig subsidence significantly decreased, and the construction efficiency increased by nearly 30%.water well drilling rig