The design of high fill embankments (HFEs) on the loess plateau requires proper foundation treatment methods and reasonable prediction of postconstruction settlement (PCS). In situ tests were carried out on a test section of the collapsible loess foundation of a high fill airport to assess the reinforcement effects of common treatment methods. Based on in situ monitored data, the spatial-temporal variations of the PCS of the HFE were investigated, with a simple empirical formula proposed for PCS prediction. The PCS increases linearly with the fill thickness, and the PCS rate varies exponentially with the fill rate. Two engineering recommendations were made to reduce differential PCS and water damage for the test site. The first is to combine the reinforcement methods to reduce PCS of the HFE, i.e., dynamic compaction for loess foundation with lower water content and gravel piles with stabilizers for that with higher water content. The second is to employ the dynamic compaction (DC), percussive compaction (PC), and vibration compaction (VC) to strengthen the fill to reach an average compaction degree above 0.93 and a water content close to the optimal.

中文翻译：

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黄土高填土路堤基础处理评估与施工后沉降预测：案例研究

黄土高原高填方路堤（HFE）的设计需要适当的地基处理方法和合理的施工后沉降预测（PCS）。在高填充机场的可塌陷黄土基础的测试段上进行了现场测试，以评估常用处理方法的加固效果。基于现场监测数据，研究了HFE PCS的时空变化，并提出了用于PCS预测的简单经验公式。PCS随填充厚度线性增加，PCS速率随填充速率呈指数变化。提出了两项​​工程建议，以减少测试现场的差异PCS和水损害。首先是结合加固方法以减少HFE的PCS，即 含水量较低的黄土地基的动态压实和含水量较高的碎石桩的稳定剂。第二种是采用动态压实（DC），冲击压实（PC）和振动压实（VC）来增强填充，使其平均压实度达到0.93以上，并且含水量接近最佳值。