Lü Guo-ren, CUI Xin-zhuang. Measurement of dynamic compaction effect and analysis of technical parameters in reconstruction of old road to expressway[J]. 2008, 29(9).
Lü Guo-ren, CUI Xin-zhuang. Measurement of dynamic compaction effect and analysis of technical parameters in reconstruction of old road to expressway[J]. 2008, 29(9).DOI:
Differential settlement of the subgrade is the main problem encoutered in the reconstruction of old road to expressway. Numerical analysis indicates 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 pore water pressure and dynamic soil stress rising during the dynamic compaction; and the dissipation of excess pore water pressure are measured and analyzed. For weathered soil subgrade
test results show that the maximum tamping number shouldn’t exceed 4 and ironing tamping can be carried out just two days after the major tamping.