impervious layer 中文意思是什麼

impervious layer 解釋
不透水層（阻水層）
  • impervious : adj. 1. 不可滲透的，穿不過的，透不過的。2. 不受干擾的，不受影響的。3. 對（批評等）無動於衷的，不接受的。adv. -ly ,-ness n.
  • layer : n 1 放置者，鋪設者，計劃者。2 【賽馬】（一般）賭客。3 產卵的雞。4 【軍事】瞄準手。5 層；階層；地...
  1. At present, with the development of land, there appear many phenomenon that soil structure was deteriorating, soil was getting hardened and impervious, black soil layer was getting thinner

    黑土是我國的主要耕作土壤，目前隨著土地的開發，一些地區土壤結構破壞，板結嚴重，黑土層變薄，地力減退。
  2. 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

    坑底為不透水層土時，應從土體發生突涌塑性破壞的角度進行分析；坑底為弱透水層土時，應從土體發生突涌滲透破壞的角度進行分析。
  3. 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

    通過計算水泥土擋土墻周圍的滲流場，研究了墻側水壓力的變化規律.結果表明：水壓力系數沿高程並非常數，且受到墻側土層分佈及其相對透水性、墻基土的透水性和下臥不透水層埋深等因素的嚴重影響.總體來說，考慮滲流時墻后的側壓力總小於不考慮滲流時的相應值，且當墻前的被動土壓力系數較小時，考慮滲流時該側的側壓力則大於不考慮滲流時的相應值，因此，這種情況有利於擋土墻的穩定
  4. At ordinary temperatures silicon is impervious to air, but at high temperatures it reacts with oxygen, forming a layer of silica that does not react further

    在常溫下，硅不和空氣反應，但是在高溫下它和氧氣反應，形成一層硅石，不再繼續發生反應。
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