Precision Surveying / Monitoring
- PRECISION SURVEYING MONITORING OF SHORING AND STRUCTURES
(Colin J. Hope, Marcelo Chuaqui).
ABSTRACT: This paper provides a synopsis of the state of practice of manual total station movement monitoring. Different variables such as instrument used, accuracy under varying and challenging conditions, sources of error, establishment of accurate baseline readings, set-up and control of survey networks, and reporting, distribution and archiving of data are examined. A specific project located in downtown Toronto provides an example of practical and technical aspects of precision survey monitoring. The excavation for the project was seven-stories deep and occupied anold, open parking lot next to several sensitive and/or significant buildings. Sixty-five targets placed on surrounding structures were monitored with a total station theodilite. Inclinometers, crack-gauges and preconstruction condition surveys of abutting structures were also part of the monitoring for the excavation portion of the project