pervious material 中文意思是什麼
pervious material
解釋
透水材料-
For example, after the collapse of ditong dam in idaho, may 5, 1976, it was found that it was not impervious very well, the impervious curtain was built poorly. when the seepage went through the impervious curtain, the exit water from the pervious material of the downstream or the right side of dam through the foundation or certain line between the foundation and the dam caused contact scour and piping
如美國愛得華州提堂壩於1976年5月5日潰決,事後調查分析,因壩基透水性大,防滲帷幕施工質量差,滲流穿透帷幕,經地基或地基與壩的接觸面從壩體下游側透水料區逸出或從右壩肩繞滲經下游壩體逸出,出逸的水流引起了接觸沖刷和管涌,導致潰壩。
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