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