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|Title:||Predictions of the airblast and ground motions resulting from explosive removal of the Birds Point-New Madrid fuze plug levee|
|Authors:||United States. Army. Corps of Engineers. Memphis District.|
Drake, James L.
Ingram, Leo F.
|Keywords:||Air blast waves|
|Publisher:||Structures Laboratory (U.S.)|
Engineer Research and Development Center (U.S.)
|Series/Report no.:||Miscellaneous paper (U.S. Army Engineer Waterways Experiment Station) ; SL-81-30.|
Abstract: Emergency flood procedures call for the creation of two large crevasses in the Birds Point-New Madrid fuze plug levee on the Mississippi River below Cairo, Ill. Slurry explosives will be used to create 11,400- and 6000-ft breaches in the levee system. Potential hazards to nearby structures from airblast and ground shock from these explosions (128 and 67 tons, respectively) were assessed. Conventional methods could not be used to predict explosion effects because of (1.) the unusual geometry of the explosion and (2.) most civil blasting safety procedures were developed for rock. A data base from row charge experiments in soil was analyzed for this project. As a result of this study, it is believed that: (A.) No structural damage should be expected at distances greater than 1800 ft from either levee section. (B.) An isolated ejecta clod is possible but not probable at distances of 2500 ft. (C.) Safe limits will be the same for both crevasses, depending only on the linear loading density of the explosive (lb/ft of levee). (D.) Although residents of Wickliffe, Ky., may hear the airblast and feel the ground vibrations, no window or structural damage should be expected there. (E.) Cairo, Ill., will not be affected. No complaints are anticipated.
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