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由于填石路基的填料比较坚硬,压实密度大,且透水性好,水容易从路面、边坡等部位进入基底而造成路基整体的不均匀沉降。同时,填石路基多修筑在山区,其填筑高度较大,地基承载力不足容易导致填石路基整体工后沉降过大,或出现变形模量差异而产生非均匀沉降。因此有必要针对填石路基地基的承载力提出较高的技术要求,尽量减少地基的压缩变形,以保证填石路基的稳定性。
Due to the filling of rockfill embankment is relatively hard, dense density, and good water permeability, water easily from the road, slope and other parts into the substrate caused by uneven subsidence of the whole roadbed. At the same time, the rockfill roadbed is built in the mountainous area, and its filling height is relatively large. The insufficient bearing capacity of the foundation can easily lead to the excessive settlement of the rockfill embankment as a whole, or the difference of deformation modulus and the nonuniform settlement. Therefore, it is necessary to put forward higher technical requirements for the bearing capacity of rockfill subgrade so as to reduce the compressive deformation of foundation so as to ensure the stability of rockfill subgrade.