Single point devices used to monitor sub-surface settlement or heave of ground.

The system comprises a series of inner and outer rods together with plates when positioned on ground before fill or Borros type anchors when used in boreholes.

Applications:

A datum for standard surface settlement plates, negating the need for costly survey; Settlement monitoring under fills, preloads and embankments; Bottom heave in excavations; Settlement and rebound associated with tunneling; Heave as a result of grouting.

Features:

• Simplicity of operation
• Uses locally-sourced common steel riser pipe
• Low cost