A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Forensic Analysis of an Excavation Bracing System Failure
This paper presents a case study of the failure of an excavation shoring (bracing) system with a sloping backfill. The initial stages of the failure were detected by a continuous automated monitoring system. Early detection allowed remedial measures to be implemented to minimize the effects of the failure and restore stability to the slope. An evaluation of the site conditions after the failure concludes that the failure mechanism was related to slickensides present within the weathered rock and rock matrix. Prior to the failure, the slickensides were undetected by previous design geotechnical studies completed by the project geotechnical engineer or preliminary observations of the excavation. Geotechnical and construction conditions that led to the failure are examined as well as an analysis of the failure using reliability methods. The results of the analysis considering the presence of slickensides are compared with the results of the analysis with the absence of slickensides. This enabled the authors to estimate the probability of failure in either case and make a comparison as to the likely cause.
Forensic Analysis of an Excavation Bracing System Failure
This paper presents a case study of the failure of an excavation shoring (bracing) system with a sloping backfill. The initial stages of the failure were detected by a continuous automated monitoring system. Early detection allowed remedial measures to be implemented to minimize the effects of the failure and restore stability to the slope. An evaluation of the site conditions after the failure concludes that the failure mechanism was related to slickensides present within the weathered rock and rock matrix. Prior to the failure, the slickensides were undetected by previous design geotechnical studies completed by the project geotechnical engineer or preliminary observations of the excavation. Geotechnical and construction conditions that led to the failure are examined as well as an analysis of the failure using reliability methods. The results of the analysis considering the presence of slickensides are compared with the results of the analysis with the absence of slickensides. This enabled the authors to estimate the probability of failure in either case and make a comparison as to the likely cause.
Forensic Analysis of an Excavation Bracing System Failure
Brahana, Daniel C. (author) / Tanner, William M. (author) / Mullins, Larry D. (author) / Troxel, Cameron (author)
GeoFlorida 2010 ; 2010 ; Orlando, Florida, United States
GeoFlorida 2010 ; 2032-2041
2010-02-15
Conference paper
Electronic Resource
English
Forensic Analysis of an Excavation Bracing System Failure
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