impervious layer meaning in English
不透水层（阻水层）
防渗层
Examples
- For impervious layer , the anti - inrushing stability of the pit is analyzed from the plastic damage of soil , but for semipervious layer , the anti - inrushing stability of the pit is analyzed from the seepage damage of soil
坑底为不透水层土时，应从土体发生突涌塑性破坏的角度进行分析；坑底为弱透水层土时，应从土体发生突涌渗透破坏的角度进行分析。 - The condition of water pressure acting on the both sides of cement - soil retaining wall is researched by computing the seepage field around the wall . it is illustrated that the coefficient of water pressure , which isn ' t constant along the height , is affected seriously by some factors , e . g . , the distribution and relative hydraulic permeability of the soil beside the wall , the hydraulic permeability of its foundation , and the buried depth of the impervious layer . as a whole , the lateral pressure acting on the wall based on seepage is always smaller than that without regard to seepage in the non - excavated zone . moreover , the pressure based on seepage is greater than that without regard to seepage in the excavated zone if the coefficient of passive pressure is smaller than 1 . 176 . this case is of great advantage to the stability of the wall
通过计算水泥土挡土墙周围的渗流场，研究了墙侧水压力的变化规律.结果表明：水压力系数沿高程并非常数，且受到墙侧土层分布及其相对透水性、墙基土的透水性和下卧不透水层埋深等因素的严重影响.总体来说，考虑渗流时墙后的侧压力总小于不考虑渗流时的相应值，且当墙前的被动土压力系数较小时，考虑渗流时该侧的侧压力则大于不考虑渗流时的相应值，因此，这种情况有利于挡土墙的稳定