高填石路堤施工期沉降规律研究

由于填石料与地基土的受力性能不同，沉降规律也大不相同，因此提出先分别考虑路基和填石料的变形，然后再叠加的方法来研究高填石路堤沉降规律。对高填石路堤地基变形的计算，采用能同时考虑剪切变形和压缩变形的修正邓肯一张模型；对填石层的变形，则采用负指数曲线来拟合现场压实曲线。最终的计算结果与实测值比较，吻合较好。可见，采用的高填石路堤施工阶段沉降的分析计算方法是可行的。

A Study on Settlement Regularity for High Rockfill Embankment During Construction

Rockfill stuff and subgrade soil should be studied on settlement rule for high rockfill embankment respectively,for the differences of the pressurized state and settlement rule.A modified Duncan Chang model suggested in the paper,in which both compression deformation and shear deformation are considered,is introduced to compute the subgrade settlement.A compaction curve of rockfill stuff on the spot is fitted by using a negative exponential curve.The settlement of high rockfill embankment is available by adding the settlement of rockfill stuff to the subgrade settlement.The good agreement between the computed and the measured values of field survey during the construction of rockfill embankment confirms the validity of the proposed approach.