Pile Running in Layered Soils

This paper presents a case study on incidents of offshore pile running in layered soils. The study provides a detailed description of the seabed soil data, pile driving records, and field surveillance video observations. Three-dimensional large deformation finite element (LDFE) analyses were conduct...

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Bibliographic Details
Published in:China ocean engineering 2023-10, Vol.37 (5), p.829-841
Main Authors: Zhao, Huan, Wang, Le, Sun, Li-qiang, Tian, Ying-hui, Reul, Oliver, Chen, Quan-zhen
Format: Article
Language:English
Subjects:
Coastal Sciences
Deformation
Engineering
Fluid- and Aerodynamics
Layered soils
Marine & Freshwater Sciences
Numerical and Computational Physics
Ocean floor
Oceanography
Offshore
Offshore Engineering
Penetration resistance
Pile driving
Piles
Prediction models
Risk assessment
Simulation
Soil
Soil layers
Soils
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Summary:This paper presents a case study on incidents of offshore pile running in layered soils. The study provides a detailed description of the seabed soil data, pile driving records, and field surveillance video observations. Three-dimensional large deformation finite element (LDFE) analyses were conducted to retrospectively analyze the incidents, considering the remoulding of seabed soil and degradation of the pile-soil interface in the LDFE modeling. By comparing the field observations with the LDFE analysis, the mechanism of pile running was discussed, with a focus on investigating the pile penetration resistance in each layer. The study revealed that pile running in layered soils primarily resulted from a significant reduction in pile base resistance when transitioning from a strong layer to an adjacent weak layer. To further investigate the pile running mechanism in layered soils, a parametric study on the strength variation of adjacent soil layers and its influence on pile base resistance was conducted. Lastly, a simplified prediction model of pile base resistance, suitable for assessing the risk of pile running in layered soils, was proposed.
ISSN:0890-5487
2191-8945
DOI:10.1007/s13344-023-0069-4