United States Department of Transportation
i
Bio-engineering for land stabilization : final report.
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2010-06-01
[PDF-30.79 MB]
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Edition:Final report.
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Abstract:As part of the Ohio Department of Transportation’s (ODOT’s) ongoing effort to solve engineering problems for the Ohio
transportation system through research, The Ohio State University has undertaken a study entitled “Bioengineering for
Land Stabilization” under the direction of Professor Patrick J. Fox and Professor Emeritus T. H. Wu.
A large number
of slopes and embankments throughout Ohio are experiencing shallow slope failures and/or erosion problems. The aim
of this study is to identify bioengineering methods to address ODOT’s slope stabilization needs in response to these
occurrences. Bioengineering is an ecologically, and often economically, attractive alternative to conventional slope
stabilization techniques. The objectives of this research are: 1) to identify important factors that control success or failure
of bioengineering methods, 2) to develop installation techniques and designs for successful application of bioengineering
methods, and 3) to provide thorough documentation to aid in the development of future design guides for bioengineering
work for ODOT.
Three field
installations were conducted and monitored at demonstration sites located in Muskingum, Logan and Union Counties.
Results indicate that biostabilization methods can be effective for the stabilization of shallow (less than 3 – 4 ft.) slides if
vegetation can be established. Establishment of vegetation is dependent on local soil and climate conditions, especially
during the first growing season after installation. The use of instrumentation (tensiometers, piezometers) can be effective
in predicting vegetation survivability. Side-by-side panel comparisons indicated that varying installation techniques do not
affect the survivability of live willow poles. The cost of bioengineering stabilization, if properly planned and implemented,
is expected to be approximately 25% less than that of conventional methods.
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