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Instrument Monitoring
Our Geotechnical Instruments can be used to measure construction-induced changes to both the built environment and ground. We supply high precision instruments that can easily be installed and monitored by users for this purpose. Not only can the information acquired be used to ensure the safety of the built environment, but it can also provide factual confirmation of the construction design to contractors and other stakeholders.
Examples of this service are as follows (*this list is not exhaustive):
- Monitoring of buildings: crack monitoring, tilting of walls, settlement, and vibration.
- Monitoring of noise levels.
- Monitoring of the ground: surface and sub-surface ground movements, sub-surface water levels and pore-water pressures.
- Monitoring of structural elements used within a construction site: Temporary steel struts, walers and retaining walls.
The type of instrument used can be chosen depending on the accuracy of data required, monitoring frequency and site constraints. Our well-experienced staff can recommend the appropriate Geotechnical Instrument to be used based on the specific needs of the project. Our seasoned staff will commence the installation of the instrument, monitoring and reporting of data. As part of our reporting protocol, we go to great lengths to identify adverse or abnormal data trends and will subsequently inform key individuals when pre-set data review levels are breached.
We guarantee that our service standards are established to surpass the common industry-wide practices in Singapore today. We aim to achieve nothing less than full client satisfaction. Please do not hesitate to contact us for a Geotechnical Instrument Monitoring quotation today.
INSTRUMENT CATEGORIES
Inclinometer
PURPOSE
To monitor lateral movements of the ground or wall
APPLICATIONS
- Monitor sheet piles and diaphragm walls to check if lateral movements are within design limits. Also, it can be used to ascertain if adjacent buildings are affected by ground movements.
- Monitor slopes and landslides to detect and predict their zones of movement
- Observe effects of tunnelling operations to determine if adjacent structures can be damaged by ground movements.
Piezometer (Casagrande/Pneumatic/Vibrating Wire)
PURPOSE
To monitor porewater pressure and piezometric water levels
VARIANTS
- Casagrande Piezometer
- Pneumatic Piezometer
- Vibrating Wire Piezometer
APPLICATIONS
- Monitor pore-water pressure to determine the stability of slope, embankments and landfill dikes.
- Evaluate effectiveness and plausibility of ground improvement techniques such as vertical drains, sand drains and dynamic compaction.
- Useful to ascertain if dewatering schemes for excavations and underground openings are necessary
- Measure drawdown (decline in groundwater levels) during pumping tests
- Monitor seepage and ground water movement in embankments, landfill dikes and dams
Water Standpipe
PURPOSE
Monitor porewater pressure and piezometric water levels
APPLICATIONS
- To monitor if the water level inside the pipe (installed underground) is rising or falling during excavations and underground opening.
- Measure water levels in water wells
Settlement (Ground/Building>Marker/Point/Socket)
PURPOSE
To monitor ground settlement or ground heave
VARIANTS
- Ground Settlement Market/Point/Socket/Rod
- Building Settlement Market/Point/Socket/Rod
- Settlement Plate
APPLICATIONS
Monitor ground surface settlement or building settlement during deep excavations adjacent to existing buildings and surfaces.
Tilt Plate/Tilt Meter
PURPOSE
To monitor changes in the tilt of a structure. The Tilt Plate is also commonly known as a Tilt Meter.
APPLICATIONS
- Monitor changes occurring in the tilt of a structure. Changes in the tilt can occur when construction activity nearby is actively affecting the ground supporting the structure. Examples of such activities can include excavation, tunnelling or dewatering. These activities may cause settlement or lateral deformation. Changes in the tilt can also be caused by a load being applied to a structure.
- Monitor rotation or angular distortion of columns, walls and beams. These anomalies are induced by tunnelling, excavation or soil compaction works.
Crack Meter
PURPOSE
To assess crack widths or opening movements on an existing structure.
VARIANTS
- Demec Gauge
- Tell-tale Gauge
APPLICATIONS
Assess cracks in concrete columns, walls and beams that have been affected by construction activity.