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|Title:||Assessment of the liquefaction hazards resulting from explosive removal of the Bird's Point-New Madrid fuze plug levee|
|Authors:||United States. Army. Corps of Engineers. Memphis District.|
Sanders, Stephen G.
|Publisher:||Geotechnical Laboratory (U.S.)|
Engineer Research and Development Center (U.S.)
|Series/Report no.:||Miscellaneous paper (U.S. Army Engineer Waterways Experiment Station) ; GL-82-5.|
Abstract: Under certain extreme circumstances emergency flood procedures call for the creation of two large crevasses in the Bird's Point-New Madrid fuze plug levee on the Missouri side of the Mississippi River below Cairo, Ill. In this situation, slurry explosives will be used to create an 11,370- and a 6,000-ft breach in the levee system. Potential liquefaction hazards to the surrounding population centers, the manline setback levee, and the new end sections of the forward levee (which will exist if the fuze plugs are removed) were assessed. Three major problems had to be overcome: (1.) the scarcity of borehole data below 15 ft in the area of concern, (2.) the scarcity of data bearing on the investigation of blast-induced liquefaction, and (3.) the inability of conventional methods to predict explosion effects such as ground motion. The last problem stated is due to the unusual geometry of the explosion. A data base from row charge experiments in soil was used in the assessment of the liquefaction hazards of this project. As a result of this study, it is concluded that: (A.) No liquefaction should be expected at distances greater than 1275 ft from the 11,370-ft levee section. Therefore, the setback levee faces no liquefaction hazard from the explosion. (B.) There will be no liquefaction occurring within Wickliffe, KY, or Cairo, IL, which are both well beyond the 1275-ft liquefaction hazard range. (C.) No liquefaction should be caused by the explosive removal of the 6000-ft levee section. (D.) Liquefaction might occur in the foundation of the 11,370-ft fuze plug and at the newly exposed end sections in the forward levee that will exist once the fuze plug is removed. The liquefaction could not extend to more than about 1000 ft from the ends of the explosive line.
|Rights:||Approved for public release; distribution is unlimited.|
|Appears in Collections:||Miscellaneous Paper|
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|MP-GL-82-5.pdf||4.8 MB||Adobe PDF|