Instrumentation and analysis of frost heave mitigation on WY-70, Encampment, WY.

Details

• Creators:
  Edgar, Thomas V.
• Corporate Creators:
  University of Wyoming. Dept. of Civil and Architectural Engineering
• Corporate Contributors:
  United States. Federal Highway Administration
• Subject/TRT Terms:
  • Instrumentation
  • Frost heaving
  • Frost heaving soils
  • Polyurethane foams
  • Subgrade (Pavements)
  • Freezing
• Publication/ Report Number:
  FHWA-WY-14/01F
• Resource Type:
  Tech Report
• Geographical Coverage:
  Wyoming
• Corporate Publisher:
  Wyoming. Dept. of Transportation
• Abstract:
  This project investigated a novel procedure to reduce or prevent subgrade freezing non-destructively by injecting a two-part polymer foam at ; the top of the subgrade. Controlled injection of Uretek Star, expanding structural polymer foam, created a continuous three-inch thick layer ; of insulation that significantly reduced the heat loss from the deeper soil and almost totally eliminated frost heave at a site on highway WY- ; 70, four and one-half miles west of Encampment, WY. The foam layer also prevented the upward movement of water from the warmer ; regime under the foam to the upper frozen regime above the foam. This prevented any segregational freezing in the upper zone. ; The two-year research project consisted of measuring pavement elevation changes along five 300-foot long lines over the heave area and ; monitoring subsurface temperatures at six locations inside and outside of the injection zone. The construction time for the 100-foot section ; was one week for injection and milling the surface. Construction was contained in one lane, leaving a lane open for the entire duration ; without a detour, increasing safety and minimizing impact for the driving public. ; Additionally, a procedure is developed for estimating the thickness of the foam layer required for other sites with different average ; temperatures.
  More +
• Format:
  PDF
• Funding:
  1001139-4211-11681
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/27415/dot_27415_DS1.pdf
• File Type:
  [PDF - 16.57 MB]
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha256:9060c3e4f8aa4255782ffeb0aa2f76679c5fb2cc0068d989e3c29713b977c75f