Precision monitoring may be required in the following cases:
- Project design has flexibility to be changed if measurements made during early stages of construction indicate that changes are required or could be beneficial.
- The facility under construction may be so important and its loss may lead to so much damage or danger that instrumentation must be used to detect any deviations from the assumed or predicted behavior of the facility, to allow timely implementation of previously planned actions to either correct the deviation or minimize losses.
- The construction procedure may rely on indications of changes in the in situ conditions for proper execution of the construction plan.
- When a new construction concept is used, instrumentation is sometimes used to show or ascertain that the concept works.
The precision monitoring program design relies on a clear definition of the geotechnical problem that is being addressed and on the fundamental understanding of the mechanisms that control the behavior. Once the objectives of the monitoring program are identified, its implementation requires selection of the following: type and number of instruments to be used, locations where measurements are to be made, installation procedures, and data acquisition system, methods for analyzing and interpreting the data.
The advantages of precision monitoring are:
- Explore risk mitigation for designer, contractor and client
- Overcome uncertainties and be sure of meeting required standards
- Quality assurance – control and measure all aspects of geotechnical process
- Safeguard neighboring assets
- Ensure that works are being carried out within safe limits
- Reduce risks
HCM Group uses the services of RWH Engineering Inc. their in-house engineering firm, for all precision monitoring projects.