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Behavior of Rock-Socketed Drilled Shaft under Uni-Axial Loading—A Parametric Study
Use of rock-socketed drilled shaft has been popular due to relative advantage in modern highway application. No interaction between drilled shaft and rock is considered in current design guideline due to the complexity and limited data availability. This results in likely conservative design for rock-socketed drilled shaft. The interaction of drilled shaft is significantly influenced by the characteristics of rock. Numerical modeling has been most cost effective to analyze drilled shaft in context of different geometries and parametric study. Numerical modeling was performed to determine behavior of the rock-socket. The numerical results were calibrated in PLAXIS2D from a full-cycle uni-axial O-cell load test. The load test was performed for drilled shaft with rock-socket which was located under a bridge pier. A Hoek-Brown failure criterion, able to consider non-linear strength behavior of rock, was selected for constitutive model of rock. The calibrated model has been selected for parametric study. The factors of parametric study for rock properties include unconfined compressive strength, geological strength index, and disturbance factor. The results of that study will reduce the cost of the drilled shaft construction.
Behavior of Rock-Socketed Drilled Shaft under Uni-Axial Loading—A Parametric Study
Use of rock-socketed drilled shaft has been popular due to relative advantage in modern highway application. No interaction between drilled shaft and rock is considered in current design guideline due to the complexity and limited data availability. This results in likely conservative design for rock-socketed drilled shaft. The interaction of drilled shaft is significantly influenced by the characteristics of rock. Numerical modeling has been most cost effective to analyze drilled shaft in context of different geometries and parametric study. Numerical modeling was performed to determine behavior of the rock-socket. The numerical results were calibrated in PLAXIS2D from a full-cycle uni-axial O-cell load test. The load test was performed for drilled shaft with rock-socket which was located under a bridge pier. A Hoek-Brown failure criterion, able to consider non-linear strength behavior of rock, was selected for constitutive model of rock. The calibrated model has been selected for parametric study. The factors of parametric study for rock properties include unconfined compressive strength, geological strength index, and disturbance factor. The results of that study will reduce the cost of the drilled shaft construction.
Behavior of Rock-Socketed Drilled Shaft under Uni-Axial Loading—A Parametric Study
Rahman, Saidur (author) / Siddiqui, Shafiq (author) / Sharp, Kimberly (author)
Eighth International Conference on Case Histories in Geotechnical Engineering ; 2019 ; Philadelphia, Pennsylvania
Geo-Congress 2019 ; 213-222
2019-03-21
Conference paper
Electronic Resource
English
Behavior of Rock-Socketed Drilled Shaft under Uni-Axial Loading—A Parametric Study
| British Library Conference Proceedings | 2019
Design of Rock-Socketed Drilled Shafts
| NTIS | 2006
Field static load tests on drilled shaft founded on or socketed into rock
| Online Contents | 2000
Field static load tests on drilled shaft founded on or socketed into rock
| British Library Online Contents | 2000