DISCUSSION OF PROGRESS REPORT ON CULVERT INVESTIGATION
A TENTATIVE METHOD WAS SUGGESTED FOR RATING CULVERT PIPES. THE RATING EQUATION SUGGESTED IS BASED ON THE DEPRECIATION AND DETERIORATION OF THE BARREL DUE TO THE PRINCIPAL DESTRUCTIVE FORCES AND MODIFIED BY THE EXTERNAL CONDITION OF INSTALLATION. IT SEEMS THE RATING SCHEME SHOULD BE DESIGNED SO AS TO TAKE INTO CONSIDERATION RATINGS TAKEN FROM ALL DESTRUCTIVE FORCES. CULVERT PIPE EXPERIMENTS ARE UNDERWAY TO OBTAIN ACTUAL PRESSURES ON THESE PIPES. REALIZING THAT IN ACCORDANCE WITH THE THEORY ON CULVERT PIPES, PRESSURES ARE FUNCTIONS OF THE RELATIVE DEFLECTION OF PIPE AND EARTH ALONGSIDE THE LEVEL OF TOP OF PIPE, PROVISIONS FOR ASCERTAINING THE PRESSURE ON PIPES AT VARIOUS FLEXIBILITIES WERE MADE. SIX DIFFERENT KINDS OF PIPE OF VARYING FLEXIBILITY EACH HAVING A DIAMETER OF 30 INCHES AND A LENGTH OF TWO FEET SIX INCHES WERE USED. THE DATA HAVE SHOWN THAT THE RELATIVE DEFLECTIONS MUST BE TAKEN INTO CONSIDERATION WHEN ATTEMPTING TO ESTIMATE OR COMPUTE THE CULVERT PIPE PRESSURES BY ANY THEORETICAL FORMULA. TESTS INDICATED THAT THIS IS TRUE, ALTHOUGH UNIT INTENSITIES OF PRESSURES WERE OBTAINED BY MEANS OF SOIL-PRESSURE CELLS. THE EARTH PRESSURES ON CULVERT PIPES THAT WERE DETERMINED APPLIED ONLY TO BODIES COMPARABLE TO SOLID CYLINDRICAL BODIES PRACTICALLY FREE FROM DEFORMATION OR DEFLECTION. NO THEORETICAL EARTH PRESSURE FORMULA FOR DETERMINING RELIABLE PRESSURES ON CULVERT PIPE CAN BE SET UP WITHOUT INCLUDING A FACTOR WHICH WOULD VARY WITH THE FLEXIBILITY OF THE PIPE.
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Supplemental Notes:
- Vol 6, pp 370-374, 1 FIG. 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.
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Authors:
- Braune, G M
- Publication Date: 1927
Media Info
- Media Type: Digital/other
- Monograph Title: Proceedings of the Sixth Annual Meeting of the Highway Research Board Held at Washington, D.C., December 2-3, 1926
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Serial:
- Highway Research Board Proceedings
- Volume: 6
- Publisher: Highway Research Board
Subject/Index Terms
- TRT Terms: Culverts; Data collection; Deflection; Depreciation; Deterioration; Drainage structures; Earth pressure; Embankments; Flexibility; Loads; Pipe culverts; Ratings; Shells (Structural forms); Surveys
- Subject Areas: Bridges and other structures; Finance; Highways; Hydraulics and Hydrology;
Filing Info
- Accession Number: 00204297
- Record Type: Publication
- Files: TRIS, TRB
- Created Date: Jun 11 1971 12:00AM