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- W28546540 abstract "NEGATIVE PROJECTING CONDUITS ARE DEFINED AS THOSE WHICH ARE PLACED IN SHALLOW DITCHES OF SUCH DEPTH THAT THE TOP OF THE CONDUIT IS BELOW THE ADJACENT NATURAL GROUND SURFACE WHICH IS COVERED BY AN EMBANKMENT. THE THEORY IS PRESENTED FOR SUCH CONDUITS. IT FOLLOWS THE GENERAL PRINCIPLES DEVELOPED BY MARSTON IN THE THEORY OF LOADS ON POSITIVE PROJECTING CONDUITS, WHICH ARE THOSE IN WHICH THE CONDUIT IS PLACED IN SHALLOW BEDDING WITH THE TOP OF THE CONDUIT PROJECTING ABOVE THE NATURAL GROUND SURFACE, BUT UNDER AN EMBANKMENT. SINCE THE LOAD ON A NEGATIVE PROJECTING CONDUIT IS LESS THAN THAT ON A POSITIVE PROJECTING CONDUIT UNDER THE SAME FILL, THERE IS CONSIDERABLE ADVANTAGE IN THE NEGATIVE PROJECTION TYPE OF CONSTRUCTION. THIS THEORY MAY BE USED TO ESTIMATE LOADS ON CONDUITS INSTALLED BY THE IMPERFECT DITCH METHOD IN WHICH THE SOIL ON BOTH SIDES AND ABOVE THE CONDUIT FOR SOME DISTANCE ABOVE ITS TOP IS THOROUGHLY COMPACTED BY ROLLING AND TAMPING. THEN A DITCH IS DUG IN THIS COMPACTED FILL BY REMOVING THE PRISM OF MATERIAL DIRECTLY OVER THE CONDUIT. THE DITCH IS REFILLED WITH LOOSE COMPRESSIBLE MATERIAL, AFTER WHICH THE EMBANKMENT IS COMPLETED IN A NORMAL MANNER." @default.
- W28546540 created "2016-06-24" @default.
- W28546540 creator A5044672208 @default.
- W28546540 date "1951-01-01" @default.
- W28546540 modified "2023-10-02" @default.
- W28546540 title "A THEORY ON LOADS ON NEGATIVE PROJECTING CONDUITS" @default.
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