中文摘要：

路堤本体的沉降问题一直是公路和铁路路基研究解决的主要问题。路堤本体主要是非饱和土，其变形由3部分组成，即瞬时压密产生的变形、主固结产生的变形和次固结产生的变形，但主固结和次固结并不是两个完全独立的过程，它们是相互影响的，即路堤本体的变形是非饱和固结一蠕变耦合的结果。以单轴压缩红层蠕变试验为基础，提出了非饱和单变量理论、路堤沉降计算理论；同时采用离心试验和数值模拟方法，对各种压实系数的路堤本体的沉降与填筑高度关系以及工后沉降与时间的关系进行了研究，并对工后最终沉降进行了预测，结果表明，模拟结果与离心试验数据预测的结果相符，说明该理论是正确的。

英文摘要：

For a long time, the settlement of embankment body is a main research problem of highway and railway roadbeds. Embankment body is mainly composed of unsaturated soils, and its deformation includes three components, namely, the deformation resulting from the instantaneous compaction, the deformations of primary consolidation and secondary consolidation deformation. However, primary and secondary consolidations influencing each other are not two completely independent processes. So the deformations of embankment body are the results of unsaturated creep and consolidation coupling. Based on the results of uniaxial compression creep test on red layers, the theories of single variable of tmsaturated soil and embankment settlement of unsaturated are put forward. And at the same time, through centrifuge tests and numerical simulation of centrifuge tests, relations between settlement and fill height, post-construction settlement and time, are studied for embankment body on various compaction coefficients, and final construction settlements are predicted. Results show that the simulated results are consistent with the predicted results by the centrifugal experimental data, indicating that the theories are correct.