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:
  Alternatives Analysis Benefit Cost Analysis Feasibility Analysis Pavement Distress Settlement (Structures) Soft Soils Soil Stabilization Subgrade (Pavements) Vertical Supports
• 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.
  
  
• Format:
  PDF
• Funding:
  134726
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha256:9e074f41061310fb3fd3fe730eb6736a49f890b7a090c63fc6ef9014e24f896c
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/28431/dot_28431_DS1.pdf
• File Type:
  [PDF - 13.95 MB ]