This paper presents the framework for the interim design guideline for the use of expanded polystyrene (EPS) block geofoam for slope stabilization and repair, based on the findings of the NCHRP Project 24-11(02) Phase I study. The overall objective of this research is to develop a design guideline as well as an appropriate material and construction standard for the use of EPS block geofoam for the function of lightweight fill in slope stability applications. The recommended design methodology included in the framework is based on an assessment of the existing technology and literature. The Phase II work will refine the interim design guideline framework and address some uncertainties in the current state of the practice of analyzing various failure mechanisms included in the design procedure. The completed research will consist of the following five primary research products: (a) a summary of the relevant engineering properties, (b) a comprehensive design guideline, (c) a material and construction standard, (d) economic data, and (e) a detailed numerical example. No formal design guidelines on the use of any type of lightweight fill for slope stabilization by reducing the driving forces are available. Therefore, the proposed interim design guideline for EPS block geofoam can serve as a blueprint for the use of other types of lightweight fills in slope stability applications. The NCHRP Project 24-11(01) and the Project 24-11(02) Phase I research confirmed that EPS block geofoam is a unique lightweight fill material and can provide a safe and economical solution for slope stabilization and repair.
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References
1.
ArellanoD., StarkT. D., HorvathJ. S., and LeshchinskyD.Guidelines for Geofoam Applications in Slope Stability Projects.NCHRP Project 24-11(02) Interim Report. Transportation Research Board of the National Academies, Washington, D.C., 2009.
2.
StarkT. D., ArellanoD., HorvathJ. S., and LeshchinskyD.Guideline and Recommended Standard for Geofoam Applications in Highway Embankments. NCHRP Project 24-11 Report. Transportation Research Board of the National Academies, Washington, D.C., 2004. http://trb.org/publications/nchrp/nchrp_rpt_529.pdf. Accessed Dec. 2008.
3.
StarkT. D., ArellanoD., HorvathJ. S., and LeshchinskyD.Geofoam Applications in the Design and Construction of Highway Embankments. NCHRP Web Document 65 (Project 24-11). Transportation Research Board of the National Academies, Washington, D.C., 2004. http://trb.org/publications/nchrp/nchrp_w65.pdf. Accessed Dec. 2008.
4.
RiadH. L.EPS Structures Innovations on Central Artery/Tunnel (CA/T) Project. Presented at BSCES/ASCE Geo-Institute Seminar on Recent Advances in Geotechnical Engineering, Waltham, Mass., 2005. http://jshce.com/files/RIAD_BSCES_EPS_Structures_on_CA-T_Project.pdf. Accessed Dec. 2008.
5.
ThompsonM. J., and WhiteD. J.Review of Stability Berm Alternatives for Environmentally Sensitive Areas. Final Report, Iowa DOT Project CSMR(5)-90-0, CTRE Project 05–203. Center for Transportation Research and Education, Iowa State University, Ames, 2005.
6.
Priority, Market-Ready Technologies and Innovations List: Expanded Polystyrene (EPS) Geofoam. Publication FHWA-HRT-06–061. FHWA, U.S. Department of Transportation, 2006. http://www.fhwa.dot.gov/crt/lifecycle/geofoam.pdf. Assessed Dec. 2008.
7.
SpikerE. C., and GoriP. L.National Landslide Hazards Mitigation Strategy—A Framework for Loss Reduction. USGS Circular 1244. U.S. Geological Survey, Reston, Va., 2003.
8.
Special Report 247: Landslides: Investigation and Mitigation (TurnerA. K., and SchusterR. L., eds.), TRB, National Research Council, Washington, D.C., 1996.
9.
AbramsonL. W., LeeT. S., SharmaS., and BoyceG. M.Slope Stability and Stabilization Methods, 2nd ed. John Wiley and Sons, Inc., New York, 2002.
10.
CornforthD. H.Landslides in Practice: Investigation, Analysis, and Remedial/Preventative Options in Soils.John Wiley and Sons, Inc., Hoboken, N.J., 2005.
11.
DuncanJ. M., and WrightS. G.Soil Strength and Slope Stability.John Wiley and Sons, Inc., Hoboken, N.J., 2005.
12.
HoltzR. D.NCHRP Synthesis of Highway Practice 147: Treatment of Problem Foundations for Highway Embankments.TRB, National Research Council, Washington, D.C., 1989.
NegusseyD.Slope Stabilization with Geofoam. FHWA Research Project 2398P62000015. Geofoam Research Center, Syracuse University, Syracuse, N.Y., 2002.
15.
TsukamotoH.Slope Stabilization by the EPS Method and Its Applications. Proc. International Symposium on EPS Construction Method (EPS Tokyo '96). EPS Construction Method Development Organization, Tokyo, 1996, pp. 362–380.
16.
LeeK.-M., ZhuG., TangD. K. W., ChengB. K. W., and YipC. L. Y.A New LGM for Construction of Embankments, Fill Slopes and Retaining Walls. Proc. International Workshop on Lightweight Geo-Materials (IW-LGM2002): A New Horizon in Soil and Ground Improvement. Japanese Geotechnical Society, Tokyo, 2002, pp. 253–260.
17.
Proc., International Symposium on EPS Construction Method (EPS Tokyo'96).EPS Construction Method Development Organization, Tokyo, 1996.
18.
LeshchinskyD.LRFD in MSE Walls: Adopt or Ignore? Presented at 16th GSI/GRI Conference, Philadelphia, Pa., 2002.
19.
YehS.-T., and GilmoreJ. B.Application of EPS for Slide Correction. In Stability and Performance of Slopes and Embankments-II, Geotechnical Special Publication 31 (SeedR. B., and BoulangerR. W., eds.), ASCE, New York, 1992.
20.
JutkofskyW. S.Geofoam Stabilization of an Embankment Slope, A Case Study of Route 23A in the Town of Jewett, Greene County.Geotechnical Engineering Bureau, New York State Department of Transportation, Albany, 1998.
21.
JutkofskyW. S., SungJ. T., and NegusseyD.Stabilization of an Embankment Slope with Geofoam. In Transportation Research Record: Journal of the Transportation Research Board, No. 1736, TRB, National Research Council, Washington, D.C., 2000, pp. 94–102.
22.
ReuterG., and RutzJ.A Lightweight Solution for Landslide Stabilization. Geotechnical Fabrics Report, Vol. 18, No. 7, 2000, pp. 42–43.
23.
ReuterG. R.Use of Geofoam for Landslide Stabilization-CTH “A,” Bay-field County, Wisconsin. Proc. 3rd International Geofoam Conference, Salt Lake City, Utah, 2001.
24.
Alabama Department of Transportation.Slide Correction on AL 44 at MP 6.4, Marion County. Foundation Report ER-6147(4). Alabama Department of Transportation, Montgomery, 2004.
25.
StarkT. D., and MannG.Landslide Stabilization Using Geofoam. Proc. 8th International Conference on Geosynthetics, Yokohama, Japan, 2006.
26.
ReadJ., DodsonT., and ThomasJ.Experimental Project Use of Shredded Tires for Lightweight Fill. Postconstruction report. Oregon Department of Transportation, Salem, 1991.
27.
CoulterT. S.Woodwaste as Lightweight Fill in Highway Construction. Proc. 28th Conference of Western Association of Canadian Highway Officials, Winnipeg, Manitoba, Canada, 1975.
28.
KilianA. P.Use of Sawdust in Landslide Correction and Settlement Control. In 35th Annual Road Builders Proceedings, 1984, pp. 35–48.
29.
NelsonD. S., and AllenW. L.Sawdust as Lightweight Fill Material. Highway Focus, Vol. 6, No. 3, 1974, pp. 53–66.
30.
NelsonD. S., and AllenW. L.Sawdust as a Lightweight Fill Material. Report FHWA-RD-74–502. FHWA, U.S. Department of Transportation, 1974.
31.
Matériaux Légers pour Remblais/Lightweight Filling Materials.Permanent International Association of Road Congresses—World Road Association, La Defense, France, 1997.
32.
PetersonD. R., ZanderA. D., SwintR. J., BussK. G., and NicholsR. A.Slide Area Stabilization with Sawdust and Bark Chips. The Transactions of the American Society of Agricultural Engineers, Vol. 24, No. 4, 1981, pp. 970–976.
33.
SharmaS., and BuuT.The Bud Peck Slide, I-15, Near Malad, Idaho. In Transportation Research Record 1343, TRB, National Research Council, Washington, D.C., 1992, pp. 123–129.
34.
HopkinsT. C., AllenD. L., DeenR. C., and GraysonC. G.Slope Maintenance and Slide Restoration: Participant Manual. FHWA Report RT-88-040. University of Kentucky Transportation Center, Lexington, 1988.
35.
LazarteC. A., EliasV., EspinozaR. D., and SabatiniP. J.Geotechnical Engineering Circular No. 7: Soil Nail Walls. Publication FHWA 0-IF-03-017. FHWA, U.S. Department of Transportation, 2003.
36.
EliasV., ChristopherB. R., and BergR. R.Mechanically Stabilized Earth Walls and Reinforced Soil Slopes Design & Construction Guidelines.Publication FHWA-NHI-00–043. National Highway Institute, Washington, D.C., 2001.
37.
ByrneR. J., CottonD., PorterfieldJ., WolschlagC., and UeblackerG.Manual for Design and Construction Monitoring of Soil Nail Walls. Publication FHWA-SA-96-069R. FHWA, U.S. Department of Transportation, 1998.
38.
HorvathJ. S.Lessons Learned from Failure: EPS Geofoam. Geotechnical Fabrics Report, Oct./Nov., 2004, pp. 34–37.
39.
RiadH. L.EPS Structures Innovations on Central Artery/Tunnel (CA/T) Project. Presented at BSCES/ASCE Geo-Institute Seminar on Recent Advances in Geotechnical Engineering, Waltham, Mass., 2005. http://jshce.com/files/RIAD_BSCES_EPS_Structures_on_CA-T_Project.pdf. Accessed Dec. 2008.
40.
RiadH. L., and HorvathJ. S.Analysis and Design of EPS-Geofoam Embankments for Seismic Loading. Geotechnical Engineering for Transportation Projects (GSP 126): Proceedings of Geo-Trans 2004 (YegianM. K., and KavazanjianE., eds.), ASCE/GEO Institute, Reston, Va., 2004, pp. 2028–2037.
41.
ArellanoD., and StarkT. D.Load Bearing Analysis of EPS-Block Geofoam Embankments. Proc. 8th International Conference on the Bearing Capacity of Roads, Railways and Airfields, Vol. 2 (TutumluerE., and Al-QadiI. L., eds.), CRC Press/Balkema, Leiden, Netherlands, 2009, pp. 981–990.
42.
Mechanistic–Empirical Pavement Design Guide: A Manual of Practice.Interim Edition. AASHTO, Washington, D.C., 2008.
