Performance of Excavations with Cross Walls
Publication: Journal of Geotechnical and Geoenvironmental Engineering
Volume 137, Issue 1
Abstract
This paper presents the performance of an excavation with cross walls based on field observations and numerical analysis results. A small strain constitutive model was used in the analysis. By comparing the movements of the real case with the same case but without cross walls installed, the effectiveness of cross walls was thus evaluated. Results indicate that the movements in the case history were substantially reduced by the installation of cross walls. The maximum wall deflection and ground settlement at a place where the cross wall was installed was reduced by about 75 and 82%, respectively. The movements near the diaphragm wall or cross wall corner were relatively small, compared with those far away from the corner. The diaphragm wall still had some deflection at the sections where cross walls were installed and the amount of deflection was close to that from linear elastic analysis. It is justified that slime between cross walls and diaphragm walls during trench excavation was fully cleaned.
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Acknowledgments
The work was supported by the National Science Council in Taiwan with Grant No. NSCTNSC96-2221-E-146-001. The writers wish to acknowledge Dr. Hsii Sheng Hsieh and Trinity Foundation and Engineering Consultant Company for their kindly providing the monitoring data.
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Published In
Journal of Geotechnical and Geoenvironmental Engineering
Volume 137 • Issue 1 • January 2011
Pages: 94 - 104
Copyright
© 2011 ASCE.
History
Received: May 19, 2008
Accepted: Jun 10, 2010
Published online: Jun 12, 2010
Published in print: Jan 2011
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