Three-Dimensional Performance of a Deep Excavation in Sand
Publication: Journal of Geotechnical and Geoenvironmental Engineering
Volume 145, Issue 4
Abstract
A 27 m deep excavation in a pyroclastic sand has been constructed in the urban area of Napoli (Italy). The main excavation is supported by T-section reinforced concrete (RC) diaphragm walls. The presence of valuable historical edifices on one side of the excavations suggested the selection of a top-down construction procedure. Maximum settlement recorded at the building façade was about 25 mm [i.e., 0.09% of the free excavation depth (He)]. Full settlement troughs were observed along three different alignments. As a matter of fact none of the monitored alignments could be interpreted exactly as a normal or a parallel settlement trough. A shape function based on the complementary error function was thus proposed to fit the observed settlement data in the plane considering both the distances x and y respectively parallel and normal to the excavation. This approach is actually a combination of existing independent methods.
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Published In
Journal of Geotechnical and Geoenvironmental Engineering
Volume 145 • Issue 4 • April 2019
Copyright
©2019 American Society of Civil Engineers.
History
Received: Jul 20, 2017
Accepted: Oct 17, 2018
Published online: Feb 15, 2019
Published in print: Apr 1, 2019
Discussion open until: Jul 15, 2019
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