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A New Method for the Analysis of Measured Displacements during Tunnelling using Control Charts  

Yim, Sung-Bin (Department of Earth & Environmental Sciences, Chungbuk National University)
Seo, Yong-Seok (Department of Earth & Environmental Sciences, Chungbuk National University)
Publication Information
The Journal of Engineering Geology / v.19, no.3, 2009 , pp. 261-268 More about this Journal
Abstract
Tunnel measurements provide crucial information on the ground stability during the excavation, visualizing the ground behavioral characteristics with quantitative dada. Generally, the frequency of the measurements is greater during the early stage of the tunnelling process and reduced with time. However, there are no quantitative criteria established for either the activities, such as the time, location and frequency of the measurement or the management guidance, especially for the site of subtle and unexpected displacement during the excavation. It is, however, still challenging to assess behavioral characteristics of subtle and unexpected displacement after stabilization. In this study, we propose a new method to assess stability and to analysis the behavioral characteristics of subtle and unexpected displacement after stabilization using statistic control charts of displacements. We also present a test result on the applicability of control chart and CUSUM control chart to measured displacements.
Keywords
tunnel monitoring; MR control chart; CUSUM control chart; displacement convergence;
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Times Cited By KSCI : 1  (Citation Analysis)
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