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Instrumentation for Disaster-Affected Reinforced Slopes in Uttarakhand, India
Landslide at Birahi in Chamoli district of the Lesser Himalayas in India had affected traffic safety along National Highway NH-58. Geotechnical and geophysical investigations were done to evaluate the causes of failures and to develop remedial measures. A slide-zone area of overburden with boulders was identified which matches with the borehole data for analyzing the probable causes of failure. Remedial measures adopted for this unstable stretch including drainage network implementation, erosion control measures, nailing on the hillside with facia, and a very tall unique retaining structure, i.e., 25 m high reinforced soil system with flexible facia on the valley side of slide area are briefed in this paper. However, the focus of the paper is on the illustration of how displacement and pressure distribution behavior of composite reinforced soil system of 25 m high installed is getting monitored through field instrumentation. The maximum displacement values are calculated using the empirical formula suggested by FHWA-NHI-10-024 guidelines. The paper also mentions about the numerical analysis of reinforced soil structure using Plaxis software. The displacement values from the results of Plaxis software analysis are reported and compared with the values obtained from empirical formulas of FHWA-NHI-10-024 guidelines.
Instrumentation for Disaster-Affected Reinforced Slopes in Uttarakhand, India
Landslide at Birahi in Chamoli district of the Lesser Himalayas in India had affected traffic safety along National Highway NH-58. Geotechnical and geophysical investigations were done to evaluate the causes of failures and to develop remedial measures. A slide-zone area of overburden with boulders was identified which matches with the borehole data for analyzing the probable causes of failure. Remedial measures adopted for this unstable stretch including drainage network implementation, erosion control measures, nailing on the hillside with facia, and a very tall unique retaining structure, i.e., 25 m high reinforced soil system with flexible facia on the valley side of slide area are briefed in this paper. However, the focus of the paper is on the illustration of how displacement and pressure distribution behavior of composite reinforced soil system of 25 m high installed is getting monitored through field instrumentation. The maximum displacement values are calculated using the empirical formula suggested by FHWA-NHI-10-024 guidelines. The paper also mentions about the numerical analysis of reinforced soil structure using Plaxis software. The displacement values from the results of Plaxis software analysis are reported and compared with the values obtained from empirical formulas of FHWA-NHI-10-024 guidelines.
Instrumentation for Disaster-Affected Reinforced Slopes in Uttarakhand, India
Lecture Notes in Civil Engineering
Hazarika, Hemanta (editor) / Madabhushi, Gopal Santana Phani (editor) / Yasuhara, Kazuya (editor) / Bergado, Dennes T. (editor) / Korulla, Minimol (author) / Beena, K. S. (author) / Mourya, Pankaj Kr. (author)
2021-02-21
10 pages
Article/Chapter (Book)
Electronic Resource
English
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