Location

New York, New York

Session Start Date

4-13-2004

Session End Date

4-17-2004

Abstract

Severe seismic effects and regional ground subsidence are well recognized conditions that should be considered for the design of foundations in Mexico City. These phenomena are magnified by lacustrine clayey soft deposits with very high compressibility and very low shear strength, which are found at the extensive Lake Zone of the city. To clarify the soil-structure interaction phenomena, a prototype foundation was instrumented, selecting a friction-piled support of an urban bridge located in the Metropolitan area of Mexico City. Soil-raft contact pressures, loads on selected piles, and pore water pressures in the subsoil below the foundation have been monitored continuously, since the beginning of the foundation construction eight years ago. The long-term performance of the foundation is known in terms of these state variables. The response of the soil-foundation system has been recorded during the occurrence of ten mild to strong earthquakes. Time-records of those geotechnical variables were obtained at the very moment of the earthquakes, additionally to the accelerograms. This case history yielded valuable information about the foundation performance before, during and after seismic events, regarding the analysis, design and regulations for this kind of foundation.

Department(s)

Civil, Architectural and Environmental Engineering

Appears In

International Conference on Case Histories in Geotechnical Engineering

Meeting Name

Fifth Conference

Publisher

University of Missouri--Rolla

Publication Date

4-13-2004

Document Version

Final Version

Rights

© 2004 University of Missouri--Rolla, All rights reserved.

Document Type

Article - Conference proceedings

File Type

text

Language

English

Share

 
COinS
 
Apr 13th, 12:00 AM Apr 17th, 12:00 AM

Behavior of a Friction-Piled Box Foundation for an Urban Bridge in Mexico City Clay

New York, New York

Severe seismic effects and regional ground subsidence are well recognized conditions that should be considered for the design of foundations in Mexico City. These phenomena are magnified by lacustrine clayey soft deposits with very high compressibility and very low shear strength, which are found at the extensive Lake Zone of the city. To clarify the soil-structure interaction phenomena, a prototype foundation was instrumented, selecting a friction-piled support of an urban bridge located in the Metropolitan area of Mexico City. Soil-raft contact pressures, loads on selected piles, and pore water pressures in the subsoil below the foundation have been monitored continuously, since the beginning of the foundation construction eight years ago. The long-term performance of the foundation is known in terms of these state variables. The response of the soil-foundation system has been recorded during the occurrence of ten mild to strong earthquakes. Time-records of those geotechnical variables were obtained at the very moment of the earthquakes, additionally to the accelerograms. This case history yielded valuable information about the foundation performance before, during and after seismic events, regarding the analysis, design and regulations for this kind of foundation.