Research Article
Jan 1961
Dewatering the Port Allen Lock Excavation
Authors: C. I. Mansur, F.ASCE, and R. I. Kaufman, M.ASCEAuthor Affiliations
Publication: Transactions of the American Society of Civil Engineers
Volume 126, Issue 1
Abstract
Thirty-six large-diameter deep wells were installed around the top of the excavation for Port Allen Lock for the purpose of lowering the hydrostatic head in the deep stratum of pervious sand that lies beneath the lock. Specifications for the project required that the number, arrangement, a nd capacity of the wells and pumps be capable of reducing the hydrostatic head in the deep sands to a level 5 ft below the bottom of the excavation ( bout el -26 mlg) with a river stage of 45 ft mean low gulf (mlg). It was required that the ground water table in the excavation areas and behind the excavation slopes belowered as was needed for satisfactory construction operations. After completion of the excavation to within 5 ft of grade, th e water table in the foundation was to be maintained 5 ft or more below the bottom of the excavation until construction work would permit flooding the structure. Approval of the dewatering system was contingent, in part, on its proven performance. After installation o f the deep well system, tests were made to determine its adequacy.
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© 1961 American Society of Civil Engineers.
History
Published in print: Jan 1961
Published online: Feb 10, 2021
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C. I. Mansur, F.ASCE
Vice-Pres., Fruco Constr. Co., a subsidiary of Fruin-Colnon Contracting Co., St.Louis, Mo.
R. I. Kaufman, M.ASCE
Chf., Geology, Soils, and Materials Branch, U. S. Army Engr. Div., Lower Miss. Valley, Vicksburg, Miss.
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