Laboratory Tests of Relief Well Filters. Report 1. Wells Along Mississippi River Levees, Alton to Gale, Illinois,
ARMY ENGINEER WATERWAYS EXPERIMENT STATION VICKSBURG MISS
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Laboratory tests to obtain data on performance of gravel filters with gradations such as might result from segregation of a typical specified filter material were conducted using a typical slotted wood well screen, three filter gravel gradations filters 1, 2, and 3, and a fine, uniform Mississippi River sand base material. Filter 1 had the average gradation of the normally specified filter gravel for relief wells in the Alton to Gale, Ill., project filters 2 and 3 represented gradations that might result from segregation of filter 1. Performance of the filters was evaluated by comparing their effectiveness in preventing piping of the foundation sand into the well, changes in head loss in the well screen and filter due to migration of materials, and effectiveness in preventing loss of sand and filter fines through well pipe perforations during surging.
- Hydrology, Limnology and Potamology
- Civil Engineering