For deep and pervious soil foundation under earth-rockfill dam, a concrete diaphragm wall must be provided to control seepage.

建造在透水的深覆盖层上的土石坝，坝基常设有混凝土防渗墙，如何正确地确定防渗墙的应力是坝工设计的难点。

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So it is a significant value for both academic and concrete project to study the subject of numerical modeling of pile - soil -superstructure dynamic interaction under seismic loading.

对地震作用下土—桩—结构动力相互作用进行数值模拟研究具有重要的学术意义和工程实用价值。

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Federal contractors say that as long as it remains undisturbed, the soil poses no danger to people because it is buried under a concrete slab.

WSJ: Toxic Radioactive Find Adds to Hanford Cleanup Woes