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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-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
The settlement of embankment ontology has always been the main problem that highway and railway subgrade research and solve. The main body of the embankment is unsaturated soil. Its deformation is composed of three parts, that is, the deformation caused by instantaneous compaction, the deformation caused by the main consolidation and the deformation caused by the secondary consolidation. However, the main consolidation and secondary consolidation are not two completely independent They are interdependent, that is, the deformation of embankment body is the result of unsaturated consolidation-creep coupling. Based on the uniaxial compressive creep test of red beds, the unsaturated univariate theory and the calculation theory of embankment settlement are put forward. At the same time, the relationship between settlement and filling height of embankment with various compaction factors is also studied by using centrifugal test and numerical simulation method As well as the relationship between post-construction settlement and time, and predicts the final post-construction settlement. The results show that the simulation results are consistent with those predicted by the centrifugal test data, indicating that the theory is correct