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Advances in Civil Engineering
Volume 2011 (2011), Article ID 275270, 17 pages
http://dx.doi.org/10.1155/2011/275270
Research Article

Nonparametric Monitoring for Geotechnical Structures Subject to Long-Term Environmental Change

Civil, Environmental, and Construction Engineering Programs, College of Engineering and Computer Science, University of Central Florida, Orlando, FL, USA

Received 23 May 2011; Accepted 1 August 2011

Academic Editor: Devendra Narain Singh

Copyright © 2011 Hae-Bum Yun and Lakshmi N. Reddi. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

A nonparametric, data-driven methodology of monitoring for geotechnical structures subject to long-term environmental change is discussed. Avoiding physical assumptions or excessive simplification of the monitored structures, the nonparametric monitoring methodology presented in this paper provides reliable performance-related information particularly when the collection of sensor data is limited. For the validation of the nonparametric methodology, a field case study was performed using a full-scale retaining wall, which had been monitored for three years using three tilt gauges. Using the very limited sensor data, it is demonstrated that important performance-related information, such as drainage performance and sensor damage, could be disentangled from significant daily, seasonal and multiyear environmental variations. Extensive literature review on recent developments of parametric and nonparametric data processing techniques for geotechnical applications is also presented.