Report No. : GEO Report No. 231

Report Title : Trial of Real-Time Drilling Process Monitoring System (2008), 34 p.

Author : A.C.S. Lai & D.O.K. Lo

Abstract

The real-time drilling process monitoring (RT-DPM) system developed by the University of Hong Kong can automatically retrieve, process and send the DPM data via wireless channels to a site server. It is possible to view real time drilling rates on a designated website. A field trial of the system was carried out at a site in Sham Tseng where feature 6SE-C/C293 was upgraded under the Landslip Preventive Measures (LPM) Project.

The objective of the study is to assess the practicality and robustness of the RT-DPM system, to evaluate its reliability, including the accuracy of the algorithms used in data processing for the estimation of the depth of the drilled hole, and to assess the quality of the data collected by the system.

The trial indicated that the RT-DPM system is reliable in providing real-time drilling data on site. It provides a quick mean of estimating the depth of the hole based on the data collected. This could be used as a driller's log for record purpose. Further development can be considered for wider application of the digital wireless data transmission aspect of the RT-DPM system on other geotechnical instrumentations, which could benefit from having real-time information on site.

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