Performance design of shallow foundations interacting with liquefiable soils
Performance design of shallow foundations interacting with liquefiable soils
Dealing with foundation soils that are likely prone to liquefaction, or at least cyclic mobility during Ultimate Limit State earthquakes, some relevant uncertainties may arise in selecting appropriate remedial schemes. While it is a most common practice to consider soil improvement works, in some practical scenarios such ordinary policy may result in unreasonable choices under both engineering and economical points of view. A typical case is the design of spread foundations or buried caissons of limited size, in moderately liquefaction prone soils. A case history is discussed in this contribution, related to a touristic infrastructure installation in a reclaimed area, at the seashore of Northern Adriatic Coast, Italy. Ordinary free-field, one-dimensional liquefaction analyses have been compared with results from numerical models based on Flac3D, implementing P2PSand constitutive model (Cheng and Detournay, 2021), capable of reproducing pore pressure build up. The seismic response has been predicted and maximum displacements as well as design stresses for the structure have been evaluated; consequently, the Performance Based Design Approach has allowed to assess the minimum countermeasures required, ensuring an appropriate safety level even without the need of huge soil improvement works.
I. Sarao Mannelli; V. Minardi; G. Canetta; B. Becci
18th European Conference on Soil Mechanics and Geotechnical Engineering (ECSMGE2024)
B - Geohazards
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