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Field instrumentation, monitoring of drilled shafts for landslide stabilization and development of pertinent design method.

File Language:
English


Filetype [PDF - 11.20 MB]

Details

  • Creators:
    Liang, Robert Y.
  • Corporate Creators:
    University of Akron. Department of Civil Engineering
  • Corporate Contributors:
    United States. Federal Highway Administration
  • Subject/TRT Terms:
  • Publication/ Report Number:
    FHWA/OH-2010/15
  • Resource Type:
    Tech Report
  • Geographical Coverage:
    Ohio
  • Corporate Publisher:
    Ohio. Dept. of Transportation
  • Abstract:
    The design method for using a single row, spaced drilled shafts, socketed into a firm rock strata, to stabilize ; an unstable slope has been developed in this research. The soil arching due to the presence of spaced ; drilled shafts in a slope was observed in 3-dimensioanl finite element simulations and field monitoring data. ; A comprehensive 3-D finite element parametric study was used to derive an empirical equation to quantify ; the arching induced load transfer. A limiting equilibrium based slope stability analysis method, incorporating ; the arching effect, was developed and coded into a PC based program UA SLOPE 2.1, to allow for analysis ; of the factor of safety of the shaft/slope system and the earth thrust on the drilled shaft. The developed ; analysis and design method was validated based on more than 40 cases of 3-dimensional finite element ; simulations, covering a wide range of slope geometry, soil strength parameters, and the drilled shaft ; diameter, spacing, and location conditions. Three slope stabilization projects in Ohio involving the use of ; drilled shafts were monitored with instrumentations to obtain a 3-year performance data of the stabilized ; slope and to validate the design based on the developed method. In addition, a field testing program at the ; ATH-124 Project site was conducted to quantify arching during several stages of surcharge load induced ; slope movements. The developed UA SLOPE 2.1 program was verified by comparisons with the calibrated ; finite element simulation results of this field surcharge loading condition. The UA SLOPE 2.1 program is ; recommended for use in finding an optimized design (i.e., location, diameter, and spacing) of the drilled ; shafts to stabilize an unstable slope.
  • Format:
    PDF
  • Funding:
    134238
  • Download URL:
    https://rosap.ntl.bts.gov/view/dot/20531/dot_20531_DS1.pdf
  • File Type:
    Filetype[PDF - 11.20 MB]
  • Collection(s):
    US Transportation Collection
  • Main Document Checksum:
    urn:sha-512:6d79a461540f4b8c62eca667b28d77e8eae79130cd94a721983341864bcefa12716d34ea78b4f00d73031d86669bedc8381ff80b27f6b95f93de282a723b21cc
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