Correlation of DCPI with deformation under proof roller loading to assess soft subgrade stabilization criterion : addendum to NCDOT final report 2011-05, entitled : "Field verification of undercut criteria and alternatives for subgrade stabilization in th

Details

• Alternative Title:
  Field verification of undercut criteria and alternatives for subgrade stabilization in the Piedmont Area.
• Creators:
  Mousavi, S. Hamed ; Gabr, Mohammed A. ; Borden, Roy H.
• Corporate Creators:
  North Carolina State University. Dept. of Civil, Construction, and Environmental Engineering
• Corporate Contributors:
  North Carolina. Dept. of Transportation ; United States. Federal Highway Administration
• Subject/TRT Terms:
  • Soil stabilization
  • Subgrade (Pavements)
  • Soft soils
  • Cone penetrometers
• Publication/ Report Number:
  FHWA/NC/2011-05
• Resource Type:
  Tech Report
• Geographical Coverage:
  North Carolina
• Corporate Publisher:
  North Carolina. Dept. of Transportation
• Abstract:
  Work presented herein is an addendum to the final report for NCDOT Project 2011-05 entitled ; “Field Verification of Undercut Criteria and Alternatives for Subgrade Stabilization in the ; Piedmont Area.” The objective of the addendum work is to provide NCDOT colleagues with ; insight regarding the use of the Dynamic Cone Penetrometer Index (DCPI) as an indication for ; the need to undercut and replace soft soils. Numerical analyses were conducted using the ; computer program PLAXIS 3-D with the soil domain subjected to two cycles of proof rolling ; load. The analyses were based on assuming various DCPI values in each of three 1ft - thick (12”) ; layers and the corresponding soil strength and modulus properties. Two passes of proof roll ; loading were applied, and the pass/fail criterion was based on the resulting subgrade deformation ; exceeding one-inch. The analyses utilized three subsurface layers with the objective of exploring ; the significance of the soft-layer location within the domain impacted by the stress bulb, and the ; resulting decision as to whether or not undercutting will be needed.
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• Format:
  PDF
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/31872/dot_31872_DS1.pdf
• File Type:
  [PDF - 297.61 KB]
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha256:53811224d2b95f10e1da139a87c1eb413a70bbea73d6992017fd483531406263