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泰安云祥土工材料有限公司 > 產品中心

產品名稱： 復合土工膜施工注意事項有哪些要求861

產品分類： 產品中心

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復合土工膜施工

　　復合土工膜是在薄膜的一側或兩側貼上土工布，形成復合土工膜。其形式有一布一膜、二布一膜、兩膜一布等。

　　土工布作為土工膜的保護層，使保護防滲層不受損壞。為減少紫外線照射，增加抗老化性能，采用埋入法鋪設。

　　施工中，首先要用料徑較小的砂土或粘土找平基面，然后再鋪設土工膜。土工膜不要繃得太緊，兩端埋入土體部分呈波紋狀，最后在所鋪的土工膜上用細砂或粘土鋪一層10cm左右過度層。砌上20-30cm塊石(或砼預制塊)作防沖保護層。施工時，應盡力避免石塊直接砸在土工膜上，邊鋪膜邊進行保護層的施工。復合土工膜與周邊結構物連接應采用膨脹螺栓和鋼板壓條錨固，連接部位要涂刷乳化瀝青(厚2mm)粘接，以防該處發生滲漏。

　　施工注意事項:

　　(1)使用須采用埋入式:覆蓋厚度不宜小于30cm

　　(2)整修防滲系統應有:墊層、防滲層，過渡層、保護層組成。

　　(3)土體要堅實，避免不均勻沉陷，裂紋，防滲范圍內的草皮、樹根要清除。與膜接觸面鋪設粒徑小的沙土或粘土作防護層。

　　(4)鋪設時土工膜不要拉得太緊，兩端埋入土體部分成波紋狀較好，特別是與剛性材料錨固時，應留有一定的伸縮量。

　　(5)施工時，應避免石塊，重物直接砸在土工膜上，邊施工，邊鋪設膜，邊覆蓋保護層。

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