Scope:
Covers measurement of wells, caissons, and well foundations for bridges, jetties, and heavy structures.
Unit of Measurement:
- Cubic metre (m³) → for excavation, concreting, filling.
- Running metre (RM) → for steining, sinking depth.
- Number (No.) → for well curbs, cutting edges.
Classification:
- By component:
- Well steining (RCC, brick, stone).
- Well curb, cutting edge.
- Bottom plug, top plug.
- Sand filling, grouting.
- Well cap.
- By material used: concrete grade, stone, steel liner.
Special Notes:
- Depth measured from working platform to founding level.
- Sinking, plugging, filling measured separately.
- Tremie concreting, seal concreting measured in m³.
- Temporary works (kentledge, staging, pumps) not measured separately.
