Chapter
Apr 26, 2012
In Situ Dynamic Compaction Tests on Subgrade for Reconstruction of Old Road to Expressway
Publication: Road Pavement Material Characterization and Rehabilitation: Selected Papers from the 2009 GeoHunan International Conference
Abstract
Differential settlement of the subgrade is the main problem encountered in the reconstruction of ole 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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Information
Published In
Road Pavement Material Characterization and Rehabilitation: Selected Papers from the 2009 GeoHunan International Conference
Pages: 118 - 123
Copyright
© 2009 American Society of Civil Engineers.
History
Published online: Apr 26, 2012
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ASCE Technical Topics:
- Compacted soils
- Compaction (material)
- Construction engineering
- Construction management
- Dynamic tests
- Engineering fundamentals
- Field tests
- Geomechanics
- Geotechnical engineering
- Highway and road management
- Highway transportation
- Highways and roads
- Infrastructure
- Laboratory tests
- Materials characterization
- Materials engineering
- Pavements
- Soil dynamics
- Soil mechanics
- Soils (by type)
- Subgrades
- Tests (by type)
- Transportation engineering
Authors
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Department of Transportation Engineering, School of Civil Engineering, Shandong University, 250061, Jinan, China. E-mail: [email protected]
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