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A platform for research: civil engineering, architecture and urbanism
Multi-Approach Global Stability Assessment of Soil Nail Walls
https://orcid.org/http://orcid.org/0000-0002-2669-8879
Global stability is one of the prominent failure modes of soil nail walls. It signifies the overall stability and long-term behavior of the soil nailed earth retaining structures. Global stability of soil nail walls is influenced by various factors including preliminary design parameters, uncertain in-situ soil conditions, static and seismic loading conditions, construction stages, complex soil–structure interaction among various components such as soil nails, facing, and in-situ soil. Conventional limit equilibrium methods of soil nail wall design fail to address such complex combinations of factors and provide a conservative estimate of the global stability. Thus, a study focused on global stability analyses of soil nail walls is desirable for better understanding and is useful for the field practitioners. In the present study, considering a typical vertical soil nail wall of 8 m height, global stability failure mode is studied in a focused manner using multiple approaches of analyses including deterministic approach, reliability concepts, and computational modeling. Factors of safety or reliability indices for global stability are determined using these approaches under static and seismic conditions. The influence of uncertainity in the determination of the in-situ soil unit weight and shear strength parameters is appropriately incorporated in the analysis. Further, seismic analysis is conducted using pseudo-static method as well as using time-history data for an actual earthquake. From the results and discussion presented, it is evident that the study provided a deeper insight into the aspect that global stability assessment varies significantly depending upon the method of analyses.
Multi-Approach Global Stability Assessment of Soil Nail Walls
https://orcid.org/http://orcid.org/0000-0002-2669-8879
Global stability is one of the prominent failure modes of soil nail walls. It signifies the overall stability and long-term behavior of the soil nailed earth retaining structures. Global stability of soil nail walls is influenced by various factors including preliminary design parameters, uncertain in-situ soil conditions, static and seismic loading conditions, construction stages, complex soil–structure interaction among various components such as soil nails, facing, and in-situ soil. Conventional limit equilibrium methods of soil nail wall design fail to address such complex combinations of factors and provide a conservative estimate of the global stability. Thus, a study focused on global stability analyses of soil nail walls is desirable for better understanding and is useful for the field practitioners. In the present study, considering a typical vertical soil nail wall of 8 m height, global stability failure mode is studied in a focused manner using multiple approaches of analyses including deterministic approach, reliability concepts, and computational modeling. Factors of safety or reliability indices for global stability are determined using these approaches under static and seismic conditions. The influence of uncertainity in the determination of the in-situ soil unit weight and shear strength parameters is appropriately incorporated in the analysis. Further, seismic analysis is conducted using pseudo-static method as well as using time-history data for an actual earthquake. From the results and discussion presented, it is evident that the study provided a deeper insight into the aspect that global stability assessment varies significantly depending upon the method of analyses.
Multi-Approach Global Stability Assessment of Soil Nail Walls
https://orcid.org/http://orcid.org/0000-0002-2669-8879
Global stability is one of the prominent failure modes of soil nail walls. It signifies the overall stability and long-term behavior of the soil nailed earth retaining structures. Global stability of soil nail walls is influenced by various factors including preliminary design parameters, uncertain in-situ soil conditions, static and seismic loading conditions, construction stages, complex soil–structure interaction among various components such as soil nails, facing, and in-situ soil. Conventional limit equilibrium methods of soil nail wall design fail to address such complex combinations of factors and provide a conservative estimate of the global stability. Thus, a study focused on global stability analyses of soil nail walls is desirable for better understanding and is useful for the field practitioners. In the present study, considering a typical vertical soil nail wall of 8 m height, global stability failure mode is studied in a focused manner using multiple approaches of analyses including deterministic approach, reliability concepts, and computational modeling. Factors of safety or reliability indices for global stability are determined using these approaches under static and seismic conditions. The influence of uncertainity in the determination of the in-situ soil unit weight and shear strength parameters is appropriately incorporated in the analysis. Further, seismic analysis is conducted using pseudo-static method as well as using time-history data for an actual earthquake. From the results and discussion presented, it is evident that the study provided a deeper insight into the aspect that global stability assessment varies significantly depending upon the method of analyses.
Multi-Approach Global Stability Assessment of Soil Nail Walls
Lecture Notes in Civil Engineering
Muthukkumaran, Kasinathan (editor) / Umashankar, Balunaini (editor) / Pitchumani, N. Kumar (editor) / Singh, Vikas Pratap (author)
Indian Geotechnical Conference ; 2021 ; Trichy, India
2023-02-15
11 pages
Article/Chapter (Book)
Electronic Resource
English
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