基于承德机场高填方土石混合料的大型强夯试验，采用激光扫描、3D建模的手段，得出单击夯沉量与夯击次数呈指数型衰减的关系，并将其分为快速下沉段和平缓发展段；由此构建3参数强夯沉降量模型；根据参数演化规律，定义α为起始夯沉量因素参数，β为待加固区的场地因素参数，δ为稳定夯沉量参数；将该模型推广至涵盖碎石土、砂土、黏土、粉土等类型地基加固中均有较好的适用性，并得出模型参数取值与场地条件的相关规律。该模型的运用能够指导强夯的设计及辅助施工效果检测，具有较强的工程实际价值。
Abstract
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.
关键词
强夯 /
地基加固 /
夯沉量 /
模型
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Key words
dynamic compaction /
foundation reinforcement /
settlement /
model
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参考文献
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