Influence of Rocking Motion on Vibratory Roller-Based Measurement of Soil Stiffness

Experimental data has shown that vibratory roller compactors often exhibit rotational kinematics in addition to translation during operation. This rotation is not considered in roller-integrated measurement systems that estimate soil stiffness based on drum vibration. To model and explore the effect of rotation, a lumped parameter roller/soil model was developed. The machine parameters for this model were tuned from suspended drum testing that isolated the drum from the ground. The model was then verified using field data collected over a range of excitation frequencies on spatially homogenous soil, and over transversely heterogeneous soil using one excitation frequency. Rotational motion was found to significantly influence roller-integrated measurement of soil stiffness based on single position drum vibration data. Rotational motion causes single position measurement system results to be nonunique and to vary depending on direction of roller travel. Using the model, various alternative measurement schemes were investigated. The directional dependence was eliminated by deriving a measurement at the drum's center of gravity, and dual-sided measurement is proposed to gain a measure of heterogeneity. A more theoretical approach was also created wherein the contact force between the drum and soil are measured rather then being calculated.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/07339399
• Supplemental Notes:
  • Abstract reprinted with permission from ASCE
• Authors:
  • Facas, Norman W
  • van Susante, Paul J
  • Mooney, Michael A
• Publication Date: 2010-7

Language

• English

Media Info

• Media Type: Print
• Features: Figures; Photos; References; Tables;
• Pagination: pp 898-905
• Serial:
  • Journal of Engineering Mechanics
  • Volume: 136
  • Issue Number: 7
  • Publisher: American Society of Civil Engineers
  • ISSN: 0733-9399
  • EISSN: 1943-7889
  • Serial URL: http://ascelibrary.org/journal/jenmdt

Subject/Index Terms

• TRT Terms: Kinematics; Road construction; Road rollers; Rocking; Soil compaction; Vibratory compaction; Vibratory equipment
• Uncontrolled Terms: Soil stiffness
• Subject Areas: Construction; Highways; I50: Construction and Supervision of Construction;

Filing Info

• Accession Number: 01162720
• Record Type: Publication
• Files: TRIS
• Created Date: Jul 16 2010 11:36AM