Development of Subgrade Stabilization Protocol

Details

• Creators:
  Cortes, Douglas D ; Bandini, Paola ; Lommler, John ; Weldon, Brad D. ; Dugas, Daniel
• Corporate Creators:
  New Mexico State University. Department of Civil Engineering
• Corporate Contributors:
  New Mexico. Department of Transportation. Research Bureau ; United States. Department of Transportation. Federal Highway Administration
• Subject/TRT Terms:
  Guidelines Soil Stabilization Specifications Subgrade (Pavements) Surveying
• Publication/ Report Number:
  NM13MSC-03
• Resource Type:
  Tech Report
• Geographical Coverage:
  United States
• Edition:
  Final Report
• Corporate Publisher:
  New Mexico. Department of Transportation
• Abstract:
  Climatic factors and traffic loads are the primary driving forces of instability in subgrade soils. Seasonal precipitation and temperature changes are responsible for fluctuations in soil water content, which can in turn lead to volumetric changes in the soil and associated changes in subgrade performance. In extreme cases, fluctuations in post-construction water contents can result in permanent deformations that can render recently built pavements unsafe and inadequate to service traffic demands. When mechanical performance issues associated to subgrade instability become apparent during construction, corrective actions can be taken without the need for pavement demolition and reconstruction. However, in many cases issues manifest themselves several months after construction, when the environmental triggers reappear. The costs associated to fixing a road already in service increase dramatically, which is aggravated by the fact that the department is left to finance the corrective actions once it takes ownership from building contractors. The broad objective of this research project is to develop subgrade improvement guidelines for selection, design and construction. The combined guidelines are expected to enable geotechnical, pavement, materials, design, and construction engineers and project managers to apply the most cost-effective solutions available for the various subgrade conditions encountered on projects across the state. The establishment of subgrade improvement guidelines and specifications is expected to eliminate preventable subgrade failures; thus, reducing the associated construction and maintenance costs, and providing better and safer roads for the public.
• Format:
  PDF
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha-512:ca8631ce3d0bf3a7b3db52264933d72b1d354790cc3150eeab046b0e1a72151dcfeec38021643c33aae5db8b56f79e191325fb3d0d05b2221bc9727384330b42
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/87110/dot_87110_DS1.pdf
• File Type:
  [PDF - 2.53 MB ]