Consideration of Depth of Influence in Implementation of Intelligent Compaction in Earthwork Quality Management

Conventional quality management of earthwork is done on the basis of spot tests, normally using a nuclear density gauge or recently using a modulus-based device. While these nondestructive (NDT) spot tests are normally carried out at a few selected locations, the intelligent compaction (IC) technology can provide full coverage of the compacted section. Proof-mapping is the process of using an IC roller to map the entire section upon completion of compaction for assessing the uniformity and consistency of compaction. One concern usually expressed about implementing IC, especially in conjunction with modulus spot tests, is the uncertainty in the depth of influence of different tests. The depth of influence of IC roller mainly depends on the roller weight, drum dimensions, operating conditions, and the properties of underlying materials. This study attempts to provide strategies to estimate the depth of influence for interpreting the IC results. A three dimensional (3D) finite element (FE) model was developed to simulate the proof-mapping of the roller on the compacted geomaterials. That FE model was used to carry out an extensive parametric study that considered a wide range of nonlinear properties of the geomaterials on single layer and two layer geosystems. It is demonstrated that the depth of influence has an inverse relationship with the stiffness of the material.

• Supplemental Notes:
  • This paper was sponsored by TRB committee AFP30 Standing Committee on Soil and Rock Properties. Alternate title: Quality Management of Earthworks Using Influence Depth of Intelligent Compaction Roller.
• Authors:
  • Fathi, Aria
  • Tirado, Cesar
  • Gholamy, Afshin
  • Lemus, Luis
  • Mazari, Mehran
  • Nazarian, Soheil
• Conference:
  • Transportation Research Board 97th Annual Meeting
  • Location: Washington DC, United States
  • Date: 2018-1-7 to 2018-1-11
• Date: 2018

Language

• English

Media Info

• Media Type: Digital/other
• Features: Figures; References; Tables;
• Pagination: 7p

Subject/Index Terms

• TRT Terms: Earthwork; Finite element method; Quality control; Road construction; Simulation
• Uncontrolled Terms: Geomaterials; Intelligent compaction; Soil stiffness
• Subject Areas: Construction; Geotechnology; Highways; Pavements;

Filing Info

• Accession Number: 01659006
• Record Type: Publication
• Report/Paper Numbers: 18-02100
• Files: TRIS, TRB, ATRI
• Created Date: Feb 5 2018 3:28PM