Effects of Pre-Excavation Activities on the Performance of Urban Cofferdams
<p> Cofferdams are often employed as temporary watertight structures made of sheet piles and internally braced with steel or reinforced concrete ring beams to retain surrounding soil. For urban cofferdam excavations, soil removal is performed following a bottom-up performance and concrete shea...
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| Language: | EN |
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California State University, Long Beach
2017
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| Online Access: | http://pqdtopen.proquest.com/#viewpdf?dispub=10264378 |
| Summary: | <p> Cofferdams are often employed as temporary watertight structures made of sheet piles and internally braced with steel or reinforced concrete ring beams to retain surrounding soil. For urban cofferdam excavations, soil removal is performed following a bottom-up performance and concrete shear walls and foundations are installed in rock or competent soil. The main goal of this study is to compare the observed performance of two cofferdams projects and conduct a series parametric analysis to study the effects of installation activities of steel ring beams. The first case history is the One Museum Park West (OMPW) and the second is the construction of a cofferdam of a structure projected to be the tallest building in America and the deepest basement built in the city. These two cofferdams evidence the need of a strict deformation control plan applicable to every construction stage, including those considered as ancillary.</p> |
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