Application of Dynamic Compaction in the Treatment of Alluvial Dam Foundation
Aqingzheng Reservoir is a typical small-scale reservoir in mountainous areas.The survey found that the bearing capacity of the alluvial layer on the riverbed dam foundation is low,and it is prone to compression deformation and seismic liquefaction.After comparing the replacement method and dynamic compaction method,the economical and environmentally friendly dynamic compaction method was chosen to treat the dam foundation.After dynamic compaction,the dry density,bearing capacity,compactness,and shear wave velocity of the alluvial layer are significantly increased,while the porosity and permeability coefficient are significantly reduced without affecting the drainage of the downstream dam foundation.The observation results show that there have been no abnormal settlement deformation or drainage problems observed during the construction and topping of the dam,effectively solving the engineering geological problems.This dynamic compaction treatment can provide reference for similar projects.
earth rock damalluvial layerdynamic compactionearthquake liquefactioncompression deformation
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