基于经验统计的杂填场地高能级强夯夯沉量预测

Settlement Prediction of High-Energy Dynamic Compaction in Miscellaneous Fill Field Based on Empirical Statistics

以离隰高速公路某杂填场地高能级强夯处治工程为研究对象,对3个不同杂填场地进行高能级强夯试验,采用经验统计方法,对不同夯击遍数的各个夯坑累计沉降量进行了数据拟合,建立了单个夯坑夯沉量预测模型。研究结果表明:浅夯坑累计夯沉量与击数的关系可用对数型公式表达,深夯坑累计夯沉量与击数的关系可用指数型公式表达。浅夯坑公式可归一化为线性公式,深夯坑可归一化为三次多项式公式。相关公式可用于类似场地的夯沉量预测。

Taking the treatment project of a miscellaneous field with the high-energy dynamic compaction in Lixi Expressway as the research objection,this paper conducted the high-energy dynamic compaction tests for three different miscellaneous fill fields.Using the empirical statistical method,the data fitting of the accumulated settlement of each pit with different tamping times was carried out,and the settlement prediction model of every single tamping pit was established.The research results showed that for the relationship between the accumulated settlement and the number of tamping,the logarithmic formula can be used to express that of shallow tamping pits,which can be normalized to a linear formula,while the exponential formula can be used to express that of deep tamping pits,which can be normalized to a cubic polynomial formula.Relevant formulas can be used for the settlement prediction of similar sites.