Background and purpose
The BOLLORE Group, which owns the CARENA shipyard located in Abidjan, has mandated TPSMI to define the maximum dredging along this quay to enable the ships to be maintained.
Our mission was to make parallel seismic measurements to verify the dock sheet pile height and thus define the dredging depth that could be reached.
The structure concerned is a pile wharf (CARENA base wharf), with a sheet piling retaining wall at the front of the wharf.
Equipment used to measure
RSM-PSF (A) parallel seismic tester
This equipment is used to test the lengths and speeds associated with the measurement process
Seismic Tester Compostion
During the mission in Côte d’Ivoire, our team carried out measurements to determine the sheet pile height along the entire wharf, using measurements taken on 7 boreholes.
Once the probe and sensor are connected to the tablet, the probe is inserted into the borehole to a depth of 20m.
Then, the sensor is placed on the sheet pile hit by a hammer at a maximum distance of 10cm.
Measurements were taken every 50cm as the probe rose to the surface.
Sheet Piling View
The measured data are analyzed using a software program called “RSM Parallel”. The data is then collected on the tablet and processed using this software.
Measurement Data before processing
Post-processing measurement Data