Research4000kN·m Level Of Compaction Soil Slope Dynamic Response Rule

With the development of economic construction， compaction has been widelyused in the actual project and high fill slope reclamation projects is increasing，whichanalyzing dynamic response of compaction loess slope has become an importantresearch topic in order to reflect the spread of tamping energy around the soil better.Therefore， this paper studied the dynamic response rule of loess slope through thedynamic compaction model tests， field tests and numerical simulation， the researchresults are as follows:1. This paper researched the variation rule of the dynamic soil stress， soilsurface vibration velocity and acceleration at the hammer bottom through the modeltests and field tests， the results showed that with the tamping energy constantlydissipating， vibration velocity gradually decreases with increasing distance of themeasuring point to the rammed point along the slope， along the vertical direction，the dynamic stress decreases with the increasing of soil depth; The soil compressionmodulus increases， dynamic compaction time decreases， which the hammer endacceleration gradually increases with the increasing of tamping times. Also bycomparative analysis of the test results of the model tests and field trials， they haveconsistent variation rule.2. This paper conducted a study of modal analysis， displacement response analysisand slope acceleration amplification factor under different boundary conditions on thedynamic compaction slope. The results showed that the compaction slope bodynatural frequency is very low， only about3Hz， smaller than the compactionvibration frequency， slope body resonance phenomenon does not occur duringdynamic compaction. Simultaneously under different boundary conditions， the samelevel of loess slope acceleration amplification factor is different.3. By using ABAQUS finite element analysis software， this paper analyzes thedisplacement deformation， vibration and stress of dynamic compaction loess slope. We found that the stress distribution in soil under dynamic compaction presents oval，and the soil displacement and velocity continuously decreases， the tamping energy isgradually dissipated as the distance increasing.