2. Study of the operation of existing structures

2.1 Measurement of general deformations and movements

Monitoring a structure involves periodically checking any deformations under permanent loads, comparing them, where possible, with a reference condition determined immediately prior to commissioning.

• Displacements can result from either :

  • of foundation movements, which can be easily observed from variations in the position of levelling marks placed on the supports. These measurements can easily be used to determine the difference in level between supports. On the other hand, the search for the absolute attitude of a support requires a reference point that is stable over time, which is far from obvious (for example, the ground around a...