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Title: HIGHWAY SHOULDERS AS RELATED TO THE PUMPING PROBLEM
Accession Number: 00203410
Record Type: Component
Abstract: PUMPING OF RIGID PAVEMENTS CANNOT OCCUR UNLESS THERE IS WATER UNDER THE PAVEMENT. EARLY STUDIES SHOW THAT PUMPING CAN BE PREVENTED BY USING GRANULAR SUBBASES. AS AXLE LOADS AND FREQUENCIES INCREASED AN ACTION SIMILAR TO PUMPING CAN DEVELOP ON SOME DENSE GRADED GRANULAR SUBBASES. INVESTIGATIONS IN INDIANA SHOW THAT MOST OF THE WATER THAT MAKES EITHER PUMPING OR EROSION POSSIBLE ORIGINATES ON THE SURFACE OF THE PAVEMENT, OR, ON POORLY DRAINED SHOULDER AREAS. THE VALUE OF SHOULDER TREATMENT AND THE IMPORTANCE OF GOOD SHOULDER MAINTENANCE IS EMPHASIZED TO PREVENT PUMPING. GOOD SHOULDERS, WELL MAINTAINED, MAKE A SUBSTANTIAL CONTRIBUTION TOWARD CONTROLLING PUMPING OF FINE-GRAINED SOIL SUBGRADES OR BLOWING OF GRANULAR SUBBASES.
Supplemental Notes: No 151, pp 9-10 Distribution, posting, or copying of this PDF is strictly prohibited without written permission of the Transportation Research Board of the National Academy of Sciences. Unless otherwise indicated, all materials in this PDF are copyrighted by the National Academy of Sciences. Copyright © National Academy of Sciences. All rights reserved.
Monograph Title: Monograph Accession #: 01410550
Authors: Spencer, W TPagination: 2p
Publication Date: 1957
Serial: Media Type: Digital/other
TRT Terms: Subject Areas: Design; Highways; Hydraulics and Hydrology; Pavements; Security and Emergencies
Files: TRIS, TRB
Created Date: Jul 7 1994 12:00AM
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