Analysis of aggregate pier systems for stabilization of subgrade settlement.

Details

• Creators:
  Bilgin, Ömer ; Arens, Kevin ; Salveter, Mark
• Corporate Creators:
  University of Dayton. Dept. of Civil and Environmental Engineering and Engineering Mechanics
• Corporate Contributors:
  United States. Federal Highway Administration
• Subject/TRT Terms:
  • Subgrade (Pavements)
  • Soft soils
  • Soil stabilization
  • Vertical supports
  • Settlement (Structures)
  • Feasibility analysis
  • Benefit cost analysis
  • Pavement distress
  • Alternatives analysis
• Publication/ Report Number:
  FHWA/OH-2014/14
• Resource Type:
  Tech Report
• Geographical Coverage:
  Ohio
• Corporate Publisher:
  Ohio. Dept. of Transportation
• Abstract:
  Every year, ODOT undertakes numerous pavement patching/resurfacing projects to repair pavement ; distress and structural failure due to soft and/or organic soils constituting the subgrade. Other than the ; temporary solution of patching/resurfacing, removal of weak soils and replacement with new suitable ; engineered fill can be used for permanent remediation. However, when problem soils are relatively deep ; this method can be too costly. There are various vertical column support methods used for civil ; engineering structures when soils are not strong enough to support the structure. Although some of ; these methods are utilized by several state DOTs to remediate settlement problems of existing ; roadways, they were not used in Ohio for this purpose. This study investigated the applicability of ; various vertical column support systems to improve subgrade and reduce settlements for existing ; roadways in Ohio. A decision matrix has been developed to identify the feasible methods. Two sites ; with ongoing subgrade settlements have been investigated through detailed subsurface investigations ; for possible implementation. Several technically feasible vertical column support methods have been ; identified for these sites. Lifetime cost-benefit analysis performed show that although there are some ; upfront costs associated with these remediation methods, the vertical column support ground ; improvement methods are significantly more cost effective compared to the current practice of ; patching/resurfacing temporary alternative during the project’s lifetime, and can result in significant ; cost savings to ODOT and roadway users.
  More +
• Format:
  PDF
• Funding:
  134726
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/28431/dot_28431_DS1.pdf
• File Type:
  [PDF - 13.95 MB]
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha256:9e074f41061310fb3fd3fe730eb6736a49f890b7a090c63fc6ef9014e24f896c