Location

St. Louis, Missouri

Session Start Date

5-6-1984

Session End Date

5-11-1984

Abstract

This paper summarizes the performance of the second instrumented research section of the Rio de Janeiro underground. The first aim of this programme was to establish a simple procedure to design diaphragm walls in soft clay soils. The model of a beam on elastic supports was chosen due to its simplicity and usefulness in the prediction of the wall behaviour. The concrete wall was built using the slurry trench technique and was instrumented to measure the concrete strain, the load on the reinforcement bars, the horizontal displacement and the horizontal earth pressure. It was measured the loads in the two level of struts. The geotechnical profile consists of a soft layer between two layers of sand. The surrounding soil received instruments to measure the pore water pressure, the horizontal and vertical displacements at different locations. This paper presents the comparison between predicted and measured values during the second stage of excavation.

Department(s)

Civil, Architectural and Environmental Engineering

Appears In

International Conference on Case Histories in Geotechnical Engineering

Meeting Name

First Conference

Publisher

Missouri University of Science and Technology

Publication Date

5-6-1984

Document Version

Final Version

Rights

© 1984 Missouri University of Science and Technology, All rights reserved.

Document Type

Article - Conference proceedings

File Type

text

Language

English

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Performance of a 30 m Deep Instrumented Diaphragm Wall

St. Louis, Missouri

This paper summarizes the performance of the second instrumented research section of the Rio de Janeiro underground. The first aim of this programme was to establish a simple procedure to design diaphragm walls in soft clay soils. The model of a beam on elastic supports was chosen due to its simplicity and usefulness in the prediction of the wall behaviour. The concrete wall was built using the slurry trench technique and was instrumented to measure the concrete strain, the load on the reinforcement bars, the horizontal displacement and the horizontal earth pressure. It was measured the loads in the two level of struts. The geotechnical profile consists of a soft layer between two layers of sand. The surrounding soil received instruments to measure the pore water pressure, the horizontal and vertical displacements at different locations. This paper presents the comparison between predicted and measured values during the second stage of excavation.