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With the social and economic development, compaction technology continues to evolve, many high energy dynamic compaction engineering practice for mushrooming , such as gravel backfill soil foundation has reached the highest level 16000kN · m, ongoing 18000 ~ 20000kN · m level of testing, collapsible loess foundation has reached the highest level 12000kN · m, ongoing 15000 ~ 17000kN · m level tests. However, current norms \the high energy level dynamic compaction can play a guiding role ; engineering technology for the development of dynamic compaction is a matter of opinion , in the high filling and deep loess and other infrastructure projects if there is need for a higher level of dynamic compaction , which reinforcing effect and reinforcement how energy efficiency is concerned about the current engineering and thinking problems , but also academic problems to be solved , and the stage of high energy level dynamic compaction studies based mainly on field trials , due to the duration and various other conditions limitations , this study has limitations . In this paper, based on similar principles to design indoor model test device for 3000kN · m, 5000kN · m, 6000kN · m, 8000kN · m, 10000kN · m and 12000kN · m -level dynamic compaction simulation experiment carried out by Shen amount of ram , dynamic stress , dry density and displacement of the comparative analysis of dynamic compaction process foundation reinforcement mechanism was studied , analyzed and compared the high energy level dynamic compaction and general energy level dynamic compaction mechanism in reinforcement , reinforcement and reinforcement effect energy efficiency and other aspects of the similarities and differences and the pros and cons . Research shows : low energy level dynamic compaction settlement divided into the main settlement and secondary compression settlement compressed in two stages , the main stage of the compression settlement amount of compaction of the ram sink more significant , high energy level dynamic compaction only the main compression settlement ; low energy level dynamic compaction on the rammer there hammer on both sides of the soil compaction effect , high energy level dynamic compaction rammer main reinforcement below the soil ; low energy level dynamic compaction to shear wave -based, high energy level dynamic compaction in compression wave based. As the level increases, the effective depth of treatment increases compaction , but the magnitude of increase gradually decreases.
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