00646031

Component

http://onlinepubs.trb.org...trr/1993/1415/1415-005.pdf

https://scholar.google.co...send&publication_year=1993

The long-term (after end of construction) behavior of large-span culverts buried in cohesive soils is presented. Nine centrifuge tests encompassing three different culvert shapes and three soils of varying degrees of plasticity were conducted. Backfill depth over the crown was fixed at 4.8 m to minimize the effect of vehicular live loads and to represent field conditions. The results show that the culvert's original shape controls its deformed shape and possible failure mode. For instance, the crowns of the semicircular culverts were rising, whereas the crowns of the low-profile arches were subsiding. The soil's plasticity was related to the magnitude of stress and deformation increase, and a linear relationship between bending moment and soil plasticity was discovered. In general, axial stress increases of 10 to 50 percent and bending moment increases of 50 to 100 percent, depending on soil plasticity, were recorded. It is suggested that long-term stress changes be accounted for in the future design of cohesive soils.

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

01403264

English

p. 40-46

1993

Transportation Research Record

0309055644

Figures (8) ; Photos (1) ; References (10) ; Tables (4)

Axial loads; Backfilling; Bending moments; Cohesive soils; Culverts; Deformation; Depth; Failure; Plasticity; Shape; Soils; Stresses; Structural analysis; Structural mechanics; Time duration

Axial stress; Long term; Structural behavior

Bridges and other structures; Geotechnology; Highways; I20: Design and Planning of Transport Infrastructure; I42: Soil Mechanics

TRIS, TRB

Apr 7 1994 12:00AM

• CUT-AND-COVER TUNNEL SUBGRADE MODELING
• DYNAMIC RESPONSE MEASUREMENTS AND IDENTIFICATION ANALYSIS OF A PAVEMENT DURING FALLING-WEIGHT DEFLECTOMETER EXPERIMENTS
• EVALUATION OF CULVERT DEFORMATIONS USING THE FINITE ELEMENT METHOD
• EVALUATION OF NONDESTRUCTIVE TEST METHODS FOR LENGTH, DIAMETER, AND STIFFNESS MEASUREMENTS ON DRILLED SHAFTS
• FIELD PERFORMANCE OF CAST-IN-PLACE NONREINFORCED CONCRETE PIPE
• LOAD REDUCTION ON RIGID CULVERTS BENEATH HIGH FILLS: LONG-TERM BEHAVIOR
• PIPELINE RESPONSE TO UNDERMINING AT EXCAVATION CROSSINGS
• POSTFAILURE BEHAVIOR OF BURIED PIPE
• SKEW EFFECTS ON BACKFILL PRESSURES AT FRAME BRIDGE ABUTMENTS
• STRESS-WAVE NONDESTRUCTIVE TESTING OF TUNNELS AND SHAFTS
• TENSIONED WIRE SYSTEM FOR MONITORING TUNNEL MOVEMENT
• TOMOGRAPHIC IMAGING STRESS CHANGES IN SOIL MEDIA