The Use of Shape Accel Arrays (SAA) for Measuring Retaining Wall Deflection

It is usual practice to instrument diaphragm walls with inclinometers and these are read either manually or automatically as required by the specification or excavation progress. The deflection is measured as a cumulative plot between each reading. Manual inclinometer readings are usually taken once a day at pre-set times and the data interpreted and displayed on specific software. The readings are taken at half metre intervals, working from the bottom upwards. In place inclinometers are usually installed or fixed at specifically designed centres within the reservation tube installed while the diaphragm wall is cast. The readings are taken automatically via a data logger and sent for processing.