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。
Underground water that is held in the soil and in pervious rocks.
土壤和能渗透的岩石中含有的地下的水。
The pervious effect produced by underground water has two attributes and imposes more influence on water pressure than on effective soil pressure.
地下水产生的渗流效应具有两重性，其对水压力的影响大于对有效土压力的影响。
The pervious effect produced by underground water has two attributes and imposes more influence on water pressure than on effective soil pressure.
地下水产生的渗流效应具有两重性，其对水压力的影响大于对有效土压力的影响。
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