Multi-Objective Foundation Optimization and Its Application to Pile Reuse
Publication: Geo-Frontiers 2011: Advances in Geotechnical Engineering
Abstract
Pile reuse has become an increasingly popular option in foundation design, mainly due to its potential cost and environmental benefits and the problem of underground congestion in urban areas. However, key geotechnical concerns remain regarding the behavior of reused piles and the modeling of foundation systems involving old and new piles to support building loads of the new structure. In this paper, a design and analysis tool for pile reuse projects will be introduced. The tool allows coupling of superstructure stiffness with the foundation model, and includes an optimization algorithm to obtain the best configuration of new piles to work alongside reused piles. Under the concept of Pareto Optimality, multi-objective optimization analyses can also reveal the relationship between material usage and the corresponding foundation performance, providing a series of reuse options at various foundation costs. The components of this analysis tool will be discussed and illustrated through a case history in London, where 110 existing piles are reused at a site to support the proposed new development. The case history reveals the difficulties faced by foundation reuse in urban areas and demonstrates the application of the design tool to tackle these challenges.
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Copyright
© 2011 American Society of Civil Engineers.
History
Published online: Apr 26, 2012
ASCE Technical Topics:
- Benefit cost ratios
- Business management
- Case studies
- Engineering fundamentals
- Financial management
- Foundation design
- Foundations
- Geotechnical engineering
- Infrastructure
- Methodology (by type)
- Models (by type)
- Optimization models
- Pile foundations
- Piles
- Practice and Profession
- Research methods (by type)
- Structural behavior
- Structural engineering
- Urban and regional development
- Urban areas
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