Based on large-scale dynamic compaction tests of high fill earth rock mixture in Chengde airport, by means of laser scanning and 3D modeling, it was shown that the exponential attenuation relationship between single click tamping settlement and tamping times is obtained, and it is divided into rapid subsidence section and gentle development section, then the 3-parameter dynamic compaction settlement model is established; according to parameter evolution law, α is defined as the initial tamping settlement factor parameter, β is the site factor parameter of the area to be reinforced, and δ is the stable tamping settlement parameter. The results showed that the established model has good applicability to cover gravel soil, sandy soil, clay, silt and other types of foundation reinforcement, and the correlation law between model parameters and site conditions is obtained; the application of the model can guide the design of dynamic compaction, assist the detection of construction effect, and have stronger practical value in engineering.
Key words
dynamic compaction /
foundation reinforcement /
settlement /
model
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