Effect of diaphragm wall construction process on the performance of braced excavation

Y. P. Dong*

*Corresponding author for this work

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Abstract

The construction of diaphragm wall panels inevitably changes the initial stress condition and causes movements in the surrounding soil mass, which will also affect the subsequent excavation performance. Majority of current design and analysis of deep excavations assume that the diaphragm wall is ‘wished-in-place’, largely because of the complexities involved to consider detailed wall installation process. Limited analyses suggested that neglecting the wall installation effect would underestimate the ground movement, structure deformation, and strut load during the major excavation stages. This paper develops realistic modelling procedure to simulate the complete construction process of diaphragm wall panels and subsequent excavation, and compares with the analysis assuming the wall ‘wished-in- place’. The ‘wall-installation-modeled’ approach can improve the accuracy of prediction and reduce discrepancy in the back analysis of deep excavations.

Original languageEnglish
Title of host publicationGeotechnical Aspects of Underground Construction in Soft Ground
Number of pages6
PublisherCRC Press/IEEE Press
Publication date2024
Pages176-181
ISBN (Print)9781032538129
ISBN (Electronic)9781040155912
DOIs
Publication statusPublished - 2024

Bibliographical note

Publisher Copyright:
© 2024 The Author(s).

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