Location

St. Louis, Missouri

Session Start Date

6-1-1993

Abstract

A load mechanism and its associated displacements for friction piles driven in a soil subject to regional subsidence is presented. The effect of a surficial crust, which is not under consolidation, is analyzed and to avoid pile emersion, a boundary for the piles safety factor is established. Foundations supported on friction piles, where the foundation slab should always be in contact with the supporting soil, is also analyzed. It is proposed to consider that the load transmitted by the foundation slab be equal to the excavated weight and it is suggested that the increase pile-soil adherence with time, should be taken into account. A maximum value for pile load capacity, in order to avoid emersion, is obtained. Results from measurements, showing the deformation distribution with depth in the clay layers down to 32 m, are shown. Finally, a design example of a compensated foundation supported on friction piles, is presented.

Department(s)

Civil, Architectural and Environmental Engineering

Appears In

International Conference on Case Histories in Geotechnical Engineering

Meeting Name

Third Conference

Publisher

University of Missouri--Rolla

Publication Date

6-1-1993

Document Version

Final Version

Rights

© 1993 University of Missouri--Rolla, All rights reserved.

Document Type

Article - Conference proceedings

File Type

text

Language

English

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Jun 1st, 12:00 AM

Friction Pile Foundations Subject to Regional Subsidence

St. Louis, Missouri

A load mechanism and its associated displacements for friction piles driven in a soil subject to regional subsidence is presented. The effect of a surficial crust, which is not under consolidation, is analyzed and to avoid pile emersion, a boundary for the piles safety factor is established. Foundations supported on friction piles, where the foundation slab should always be in contact with the supporting soil, is also analyzed. It is proposed to consider that the load transmitted by the foundation slab be equal to the excavated weight and it is suggested that the increase pile-soil adherence with time, should be taken into account. A maximum value for pile load capacity, in order to avoid emersion, is obtained. Results from measurements, showing the deformation distribution with depth in the clay layers down to 32 m, are shown. Finally, a design example of a compensated foundation supported on friction piles, is presented.