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Title: LOAD REDUCTION ON RIGID CULVERTS BENEATH HIGH FILLS: LONG-TERM BEHAVIOR
Accession Number: 00646034
Record Type: Component
Availability: Find a library where document is available Abstract: Three full-scale tests with the imperfect ditch method are described. The imperfect ditch method involves installing a compressible inclusion above rigid culverts to reduce the vertical earth pressure. Superlight expanded polystyrene blocks are used as the compressible material. In the first test, the instrumented culvert was a 1.95-m diameter concrete pipe beneath a 14-m-high rockfill embankment. In the second test, a 1.71-m diameter concrete pipe was used beneath a 15-m-high rock fill, and in the third, the culvert is a cast-in-place concrete box culvert with a 2.0-m width beneath 11 m of silty clay. The culverts were built between 1988 and 1989, and the instrumentation measured earth pressure, deformation, and temperature. The full-scale measurements show considerable reduction in the vertical earth pressure: that on top of the pipes in the granular fill was reduced to less than 30 percent of the overburden and that on the box culvert beneath the clay fill was reduced to less than 50 percent of the overburden. The deformation of the expanded polystyrene was 27 percent in the rock fill and 42 percent in the clay. The long-term observations show that there is no increase in earth pressure on and deformation of the pipes beneath the rock fill. There is a slight increase in deformation of the expanded polystyrene in the clay. Use of this method in Norway has realized cost reductions of the order of 30 percent and has made it possible to use concrete pipes beneath higher fills.
Supplemental Notes: This paper appears in Transportation Research Record No. 1415, Field Performance of Structures and Nondestructive Evaluation of Subsurface Infrastructure. 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: Field performance of structures and nondestructive evaluation of subsurface infrastructure Monograph Accession #: 01403264
Language: English
Authors: Vaslestad, JanJohansen, Tor HelgeHolm, WillyPagination: p. 58-68
Publication Date: 1993
Serial: ISBN: 0309055644
Features: Figures
(14)
; References
(24)
TRT Terms: Uncontrolled Terms: Old TRIS Terms: Subject Areas: Bridges and other structures; Geotechnology; Highways; I20: Design and Planning of Transport Infrastructure; I42: Soil Mechanics
Files: TRIS, TRB, ATRI
Created Date: Apr 7 1994 12:00AM
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