In Situ Dynamic Compaction Tests on Subgrade for Reconstruction of Old Road to Expressway

Differential settlement of the subgrade is the main problem encountered in the reconstruction of old road to expressway. Numerical analysis indicated that the treatment to new nature ground is the key to decreasing the differential settlement. Dynamic compaction is an effective method of improving ground. In order to optimize its construction parameters, dynamic-compaction-induced dynamic pore pressure and dynamic soil stress and the dissipation of excess pore pressure after tamping were measured and analyzed. For the soil subgrade tested, the maximum tamping number shouldn’t exceed 4 and the dynamic compactions of the next time should be carried out two days after the previous.

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• Corporate Authors:

  American Society of Civil Engineers

  1801 Alexander Bell Drive
  Reston, VA  United States  20191-4400
• Authors:
  • Cui, Xin-zhuang
• Conference:
  • GeoHunan International Conference: Challenges and Recent Advances in Pavement Technologies and Transportation Geotechnics
  • Location: Changsha Hunan, China
  • Date: 2009-8-3 to 2009-8-6
• Publication Date: 2009

Language

• English

Media Info

• Media Type: Print
• Features: Figures; References;
• Pagination: pp 118-123
• Monograph Title: Road Pavement Material Characterization and Rehabilitation: Selected Papers From the 2009 GeoHunan International Conference

Subject/Index Terms

• TRT Terms: Compaction; Differential settlement; Field tests; Reconstruction; Subgrade (Pavements)
• Geographic Terms: China
• Subject Areas: Construction; Geotechnology; Highways; I42: Soil Mechanics;

Filing Info

• Accession Number: 01139927
• Record Type: Publication
• ISBN: 9780784410431
• Files: TRIS
• Created Date: Sep 18 2009 7:08AM