Burnett River Dam, Queensland (2004)

Supply geotechnical instrumentation and field supervision/technical support during construction of RCC (Roller Compacted Concrete) dam in Queensland. The instrumentation includes vibrating wire piezometers, embedment strain gauges, thermistors,  thermocouples, cabling, lightening protection and datalogger system. Instruments are linked via cables to the datalogger system (Master Logger and Sub-loggers) to carry out automatic monitoring of instrumentation.

Supply and supervise installation of geotechnical instrumentation for a RCC (Roller Compacted Concrete) dam in Perak, Malaysia. The instrumentation includes piezometers (vibrating wire and standpipe types), VW strain gauges, rosettes, thermocouples, concrete pressure cells, seepage weir monitors, jointmeters, thermistors, cabling, associated terminal boxes and automatic datalogger system (with telephone telemetry system). All the instruments are linked to the datalogger system (Sub-Loggers and Master Logger) located at various locations in the dam galleries - to carry out automatic monitoring of the instruments during and after construction of the dam.

This recent project involved the supply and installation of multiple piezometers in the dam toe, crest and secondary embankment. Terminal boxes with lightning protection provided safe and convenient access for readout units.

Supply and supervise the installation of geotechnical monitoring instrumentation in a weir lock to monitor hydrostatic uplift pressures underneath the weir apron. The instrumentation included vibrating wire piezometers that were all interfaced to a datalogger. Variable acceleration alarms on the datalogger system were incorporated to highlight problem areas. A telemetry system allowed a remote engineer to download data.

This project involved the supply and installation of multiple piezometers in the dam crest. The piezometer boreholes in the dam core were drilled by cable tool method. A special horizontal driving method was employed to maintain the integrity of the road pavement. Terminal boxes with lightning protection provided safe and convenient access for readout units.

Supply and supervise the installation of dam instrumentation for an earth-fill dam in Sulawesi, Indonesia. The instrumentation comprises piezometers (hydraulic and vibrating wire types), magnetic settlement system, thermometers, vibrating wire earth pressure cells, horizontal deformation indicators, settlement system (hydrostatic and vibrating wire types) and seismographs with associated terminal boxes and readouts. The work also included testing and commissioning the instrumentation during construction. Additional work included water depth measurements with GPS location.

Supply and supervise the installation of instrumentation for tunnel and underground excavation monitoring in a hydro-electric power project in Java, Indonesia. The instrumentation comprised of load cells, rod extensometers and tape extensometers (for convergence monitoring). The work also includes testing and commissioning the instrumentation during construction.

Supply and supervise the installation of geotechnical instrumentation for major earth-fill dam, located in a seismically active part of Java. The dam was instrumented to monitor piezometer pressure (hydraulic and vibrating wire piezometers), settlement (hydraulic and magnetic settlement systems), horizontal dam displacement within the embankment and at the crest (horizontal extensometers) and seismic monitoring.

Supply geotechnical instruments and provide technical advise for the installation of a slope stability monitoring system in an open cut mine located in high country. The site had particularly difficult geotechnical conditions that resulted in frequent landslides. The instrumentation included vibrating wire piezometers and horizontal extensometers that were interfaced to a datalogger at a remote monitoring unit. A radio telemetry system relayed all collected data to a computer in the mine office for interpretation and analysis.

Supply and provide technical advice for the installation of geotechnical instrumentation in an open cut mine to monitor cut slope stability. The instrumentation included rod extensometers linked to a datalogger that activated a radio alarm to indicate excessive movements of the monitored cut slopes.

Supply and supervise the installation of slope stability monitoring system in an open cut mine comprising crack-meters and surface wire extensometers. All the instruments were datalogged and linked to radio alarms so that mine plant operators can be warned of any potential slope failures. Radio alarms are activated by the datalogger, when excessive movements are detected. A cut slope failure was successfully detected by this system.