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某抽水蓄能电站的上、下库进出口渠道两侧边坡为风化砾质砂土,坡高约60m,坡度为1:2.5。渠内水位升降的幅度和频率都较大。边坡的保护层下采用土工织物过滤,这就带来一个在双向水流作用下的土工织物反滤效果的问题。4kg膨润土防水毯/长沙5kg膨润土防水毯-价格
(3)定期检查植被的成活率、覆盖面和发育成长情况。(山东联祥三维网护坡韦邦辉15621368875)
[实例4-5]下荆江后洲编织物土枕护岸⑤
4kg膨润土防水毯/长沙5kg膨润土防水毯-价格
≤5×10-11≤5×10-11针刺密度(l/cm2)≥15≥15≥15顺机向抗拉强度(kN/m)18 14 12横机向抗拉强度(kN/m)8 24 12顺机向伸长率(%)10 60 50横机向伸长率(%)5 50 50剥离强度(N/10cm)≥30 60 60卷尺寸(m×m)4.8×3.0 4.8×3.0 4.8×3.0卷径(cm)60 60 60应用范围1.地下水保护2.堤坝、水库防渗;3.代替粘土垫层1.地下水保护;2.堤坝、水库防渗;3.代替粘土垫层;4.填筑及掩埋物的密封面层埴筑及掩及掩埋物的密封面层或污染区域的密封层
式中:t为干砌块石护坡厚度,m;Kl为系数,一般干砌石可取0.266,方石和条石可取0.225;γb为块石的容重,kN/m3;γω为水的容重,kN/m3;H为计算波高,m(d/L≥0.125时,取H4%;d/L<0.125时,取H13%。d为堤前水深,L为波长);m为坡率,m=ctgα(α为斜坡坡角)。
4kg膨润土防水毯/长沙5kg膨润土防水毯-价格
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