Embankment Widening and Grade Raising on Soft Foundation Soils, Phase 2 : Final Report

490 Pages·1993·7.6 MB·English

by  Ludlow, Scott J., 1962- (Scott James)

SCHOOL OF
CIVIL ENGINEERING
INDIANA
DEPARTMENT OF HIGHWAYS
JOINT HIGHWAY RESEARCH PROJECT
FHWA/IN/JHRP/92/19
Final Report
PHASE II - EMBANKMENT WIDENING AND
GRADE RAISING ON SOFT FOUNDATION SOILS
Scott J. Ludlow
Wai-Fah Chen
Philippe L. Bourdeau
C. William Lovell
UNIVERSITY

JOINT HIGHWAY RESEARCH PROJECT
FHWA/IN/JHRP/92/19
Final Report
PHASE II - EMBANKMENT WIDENING AND
GRADE RAISING ON SOFT FOUNDATION SOILS
Scott J. Ludlow
Wai-Fah Chen
Philippe L. Bourdeau
C. William Lovell
Digitized by the Internet Archive
in 2011 with funding from
LYRASIS members and Sloan Foundation; Indiana Department of Transportation
http://www.archive.org/details/embankmentwideniOOIudl
Final Report
Phase II - Embankment Widening and Grade
Raising on Soft Foundation Soils
by
Scott J. Ludlow
Graduate Research Assistant
Wai-Fah Chen
Professor of Civil Engineering
Philippe L. Bourdeau
Assistant Professor of Civil Engineering
and
C. William Lovell
Professor of Civil Engineering
Joint Highway Research Project
Project No: C-36-36U
File No: 6-14-21
This study was conducted by the
Joint Highway Research Project
in cooperation with the
Indiana Department of Transportation
and the
Federal Highway Administration
The contents of this report reflect the views of the authors who
are responsible for the facts and the accuracy of the data
presented herein. The contents do not necessarily reflect the
official views or policies of the Federal Highway Administration or
of the Indiana Department of Transportation. This report does not
constitute a standard, specification, or regulation.
Purdue University
West Lafayette, Indiana 47907
April 13, 1993

9
TECHNICAL REPORT STANDARD TITLE PACE
1. ReportNo. 7. Government Acce 3. Recipient's CatalogNo.
FHWA/IN/JHRP-92/19
4. Till*and Subtitle 5. ReportData
Phase II - embankment widening and grade rising June 30, 1992
on soft foundation soils 6. PerformingOrganization Code
7. Aufhor(s) 8. Performing Organization ReportNo.
Scott J. Ludlow, Wai-Fah Chen, Philippe L. Bourdeau FHWA/IN/JHRP-92/1
and C. William TovpI1
9. PerformingOrganizationNomeandAddress 10. Work UnitNo.
Joint Highway Research Project
Civil Engineering Building 11. ControcforGrantNo.
Purdue University HPR-2031
West Lafayette, IN 47907 13. Typeof Reportand Period Covered
12. SponsoringAgencyNomeandAddres"
Indiana Department of Transportation
Final Report
State Office Building
100 North Senate Avenue 14. SponsoringAgencyCode
Indianapolis, IN 46204
15. SupplementaryNotes
Prepared in cooperation with the U.S. Department of Transportation, Federal
Highway Administration.
16. Abstract
The finite element technique using a cap elastic-plastic work-hardening soil
behavior model was applied to the analysis of embankments constructed on soft
foundation soils. A procedure was provided to estimate the cap model parameters
from conventional field and laboratory test results. A sensitivity analysis
of the cap model parameters comparing the observed and calculated responses was
also provided. Results indicate that the undrained shear strength and over-
consolidation ratios were observed to have the most-significant influence on the
predicted model behavior.
The technique was then applied to the analysis of two examples. The examples were
based on actual highway projects in Indiana where information on these projects
was provided by INDOT personnel. Results of the analysis were used to determine
the influence of several factors on reinforced and unreinforced embankment
behavior. The results indicated that the crust strength and foundation
compressibility had the most-significant influence on embankment fill and foundation
soil behavior and the potential benefit possible with reinforcement. Reinforcement
type/modulus also influenced the behavior of the embankment fill and foundation
soil but to a lesser extent when compared to crush strength. The use of
reinforcement for widening and grade raising of existing embankments appeared to
be beneficial in reducing lateral movement.
17. KeyWords 18. DistributionStatement
Embankments, reinforcement, geotextiles No restrictions. This document is
finite element method, soft foundations, available to the public through the
settlements, cap plasticity model National Technical Information Service,
Springfield, Virginia 22161
19. SecurityClossii.(ofthisreport) 2C SecurityClassif.(ofthispage) 21. No.ofPoges 22. Price
Unclassified Unclassified 356
Form DOT F 1700.7 is-ssi

Purdue University
W
SchoolofCivilEngineering
DRAFT FINAL REPORT
TO: Vincent P. Drnevich, Director July 23, 1992
Joint Highway Research Project
FROM: W. F. Chen, Research Engineer Project No: C-36-36U
Joint Highway Research Project File: 6-14-21
Attached is the draft final Report on the HPR Part II study entitled, "Embankment
Widening and Grade Raising on Soft Foundation Soils". The authors of the report are Scott J.
Ludlow, Wai-Fah Chen, Philippe L. Bourdeau and C. William Lovell.
Copies ofthisreportwill be submittedto the IDOH and FHWA fortheirreview. My co-
authors and I look forward to receiving their comments on the report.
Respectfully submitted,
/)
W.F. Chen
Research Engineer
WFC/cak
Attachment
cc: A.G. Altschaeffl A.R. Fendrick G.J. Rorbakken
D. Andrewski J.D. Flicker C.F. Scholer
P.L. Bourdeau D.W. Halpin G.B. Shoener
M.D. Bowman K.R. Hoover K.C. Sinha
M.J. Cassidy R.H. Lee D.L. Tolbert
L.M. Chang C.W. Lovell C.A. Venable
S. Diamond R.H. Lowry T.D. White
J.J. Dillon D.W. Lucas L.E. Wood
W.L. Dolch B.G. McCullouch J.R. Wright
V.P. Drnevich B.K. Partridge R.F. Wukasch
J.A. Ramirez
CivilEngineering Building.WestLafayette, IN47907-1284. FAX (317)49&-1105