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[单选题]
排水沟、天沟一般采用深()m,底宽0.4m的梯形断面,边坡1:1,并采用混凝土等级不低于C15的混凝土预制构件予以加固。
A.0.6
B.0.7
C.0.75
D.0.8
查看答案
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A.0.6
B.0.7
C.0.75
D.0.8
A.路堤边坡高〈3m时,边坡采用C25空心砖客土植草,边坡高〉3m时,边坡采用C25拱型骨架内空心砖植草防护
B.空心砖满铺时,顶部和底部镶边宽0.5m,基础采用顶宽0.5m,底宽0.7m,埋深0.8m全埋式C25砼基础
C.每隔20m设置一处C25砼排水槽,排水槽宽0.6m,镶入边坡0.4m,外露挡水板宽高0.1m
D.拱型骨架主骨架宽0.6m,主骨架肋骨厚0.6m;拱骨架宽0.5m,厚0.6m;侧面镶边宽0.5m,顶部及底部镶边宽1m,均采用C25混凝土现浇,厚0.4m