A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Design and Stability Analysis of a Novel Pretensioned Soil Nailing System in Korea
In this study, a newly modified soil nailing technology named as the PSN (Pretension Soil Nailing), is developed to reduce both facing displacements and ground surface settlements in top-down excavation process as well as to increase the global stability. Up to now, the analytical procedure and design technique are proposed to evaluate maximum pretension force and stability of the PSN system. Also proposed are techniques to determine the required thickness of a shotcrete facing and to estimate probability of a failure against the punching shear. Based on the proposed procedure and technique, effects of the radius of a influence circle and dilatancy angle on the thickness of a shotcrete facing, bonded length and safety factors are evaluated. In addition, effects of the reduction of deformations expected by pretension of the soil nails are examined in detail throughout an illustrative example and FLAC2D program analysis. Numerical analysis is carried out to determine a postulated failure surface as well as a minimum safety factor of the proposed PSN system using the shear strength reduction technique with the FLAC2D program. Global minimum safety factors and local safety factors at various excavation stages computed in case of the PSN system are analyzed throughout comparisons with the results expected in case of the general soil nailing system.
Design and Stability Analysis of a Novel Pretensioned Soil Nailing System in Korea
In this study, a newly modified soil nailing technology named as the PSN (Pretension Soil Nailing), is developed to reduce both facing displacements and ground surface settlements in top-down excavation process as well as to increase the global stability. Up to now, the analytical procedure and design technique are proposed to evaluate maximum pretension force and stability of the PSN system. Also proposed are techniques to determine the required thickness of a shotcrete facing and to estimate probability of a failure against the punching shear. Based on the proposed procedure and technique, effects of the radius of a influence circle and dilatancy angle on the thickness of a shotcrete facing, bonded length and safety factors are evaluated. In addition, effects of the reduction of deformations expected by pretension of the soil nails are examined in detail throughout an illustrative example and FLAC2D program analysis. Numerical analysis is carried out to determine a postulated failure surface as well as a minimum safety factor of the proposed PSN system using the shear strength reduction technique with the FLAC2D program. Global minimum safety factors and local safety factors at various excavation stages computed in case of the PSN system are analyzed throughout comparisons with the results expected in case of the general soil nailing system.
Design and Stability Analysis of a Novel Pretensioned Soil Nailing System in Korea
Park, S. S. (author) / Kim, H. T. (author)
GeoShanghai International Conference 2006 ; 2006 ; Shanghai, China
Advances in Earth Structures ; 302-309
2006-05-11
Conference paper
Electronic Resource
English
Design and Stability Analysis of a Novel Pretensioned Soil Nailing System in Korea
| British Library Conference Proceedings | 2006
Design of pretensioned soil nailing systems in excavations
| British Library Conference Proceedings | 2000
Analysis of soil nailing system
| British Library Conference Proceedings | 1992
SOIL NAILING APPARATUS AND SOIL NAILING METHOD USING THAT
| European Patent Office | 2016