Proceedings - Fifth International Conference & Exhibition on Piling and Deep Foundations, 1994, Bruges, Belgium, (DFI)
The role of driven pile instrumentation
Current methods of prediction of bearing capacity and pile behavior based on measurement of the pile response under high energy impact, have significant limitations because the long term behavior of the soil is not manifested dring such short durations. However, good use can be made of pile installation monitoring to obtain a measure of the soil characteristics which may be compared on a given site and the relative beharior of each pile can be inferred. Many purists may believe that for complete pile driving analysis, strain gauges and accelerometers attached to the pile are the only complete solution: this may well be the case but in many situations this level of sophistication proves to be impractical as an every day tool for monitoring the installation of all driven piles. A preferred solution may be a rig mounted system which allows unaided monitoring of every segment/tube driven. A new system has been developed and deployed on the fleet of driven rigs employed by Cementation Piling and Foundations. The system is used for both cast in-situ and precast piles. Some of the experiences are detailed together with a description of the design features of the system which provides a wealth of management information regarding the entire piling operation in this discipline.
|article #812; publication #36 (IC-1994)|