Both saturated-unsaturated flow drainage experiment without the fine sand layer on the top of the coarse sand and air-water two-phase flow drainage experiment with the fine sand layer were performed.
进行了粗砂上部没有细砂层的均质砂柱的饱和-非饱和流排水实验以及粗砂上部存在细砂层的水气二相流排水实验。
As the overall quality and rigidity of the structure with gravel drainage layer increased, the stability of the structure increased.
碎石排水层加大了结构与碎石的整体质量和刚度，增加了结构的稳定性。
By dewatering of foundation pit, the points above the drainage layer all have a considerable influence and the shorter distance with the subgrade surface the more influence.
但随着基坑降水的进行，排水层以上各点均受较大影响，并且距离路基表面越近影响越大。
By dewatering of foundation pit, the points above the drainage layer all have a considerable influence and the shorter distance with the subgrade surface the more influence.
但随着基坑降水的进行，排水层以上各点均受较大影响，并且距离路基表面越近影响越大。
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