Comparative analysis of common dynamic tamping and high-speed hydraulic tamping process used in foundation treatment of reclaimed sand layer
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Abstract:
Based on the Daxiaodeng land formation and foundation treatment project,we carry out the field-test comparative study on ordinary dynamic ramming and high-speed hydraulic ramming technology and test the standard penetration number of soil layers before and after reinforcement. The results show that the two processes can meet the design requirements of no less than 15 strokes after the blown sand layer is strengthened,and the ultra-static pore water pressure value at 4~6 m at mid-shallow depths by the hydraulic static tamping is greater than that by ordinary dynamic ramming. However,the impact of ordinary dynamic compaction is greater than that of high-speed hydraulic compaction. The high-speed hydraulic tamping process can be applied to the consolidation of the filled sand of mid-shallow depths.