Location

New York, New York

Session Start Date

4-13-2004

Session End Date

4-17-2004

Abstract

The paper presents the investigation conducted in a one-story-house and its rear annex which suffered severe damages due to a process of differential settlements of their foundations, flowing water in the subsoil and vibrations of the traffic of vehicles on the street nearby. The house is located in the city of Curitiba in the south of Brazil. The subsoil is composed of tropical clay and sand silty soils of Guabirotuba Formation. It is formed of pleistocene sediments in Curitiba area. The foundations of the house and the annex were in excavated small 8” diameter short concrete piles. Due to the differential settlements, a great number of cracks appeared in the house and in the annex walls. Many walls were distorted badly. Flowing water is presented in the subsoil. At the annex rear house the piles are embedded in a non-compacted fill. A concrete counterfort wall was constructed on the north border side of the site with a deficient drainage system. The damages which the house and the annex have been suffered due to the combination of geotechnical factors were such that the results were comparable of a earthquake with magnitudes M=5 to M=63/4, as the analysis showed. The studies showed valuable conclusions about the relationship between the differential settlements existing in the construction and the results of the seismic effects which are presented in the text. The house and the annex were underpinned, and their foundations were strengthened through the use of injected piles. The implications of the findings as far as the seismic aspects of the liquefaction phenomenon are concerned are discussed in the text.

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

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

Conditions of Structural Stability and Vibration Damage

New York, New York

The paper presents the investigation conducted in a one-story-house and its rear annex which suffered severe damages due to a process of differential settlements of their foundations, flowing water in the subsoil and vibrations of the traffic of vehicles on the street nearby. The house is located in the city of Curitiba in the south of Brazil. The subsoil is composed of tropical clay and sand silty soils of Guabirotuba Formation. It is formed of pleistocene sediments in Curitiba area. The foundations of the house and the annex were in excavated small 8” diameter short concrete piles. Due to the differential settlements, a great number of cracks appeared in the house and in the annex walls. Many walls were distorted badly. Flowing water is presented in the subsoil. At the annex rear house the piles are embedded in a non-compacted fill. A concrete counterfort wall was constructed on the north border side of the site with a deficient drainage system. The damages which the house and the annex have been suffered due to the combination of geotechnical factors were such that the results were comparable of a earthquake with magnitudes M=5 to M=63/4, as the analysis showed. The studies showed valuable conclusions about the relationship between the differential settlements existing in the construction and the results of the seismic effects which are presented in the text. The house and the annex were underpinned, and their foundations were strengthened through the use of injected piles. The implications of the findings as far as the seismic aspects of the liquefaction phenomenon are concerned are discussed in the text.