![](https://static.youtibao.com/asksite/comm/h5/images/m_q_title.png)
[单选题]
沿钢架外缘每隔2m应用钢楔或混凝土预制块与围岩顶紧,钢架与围岩间的间隙应采用喷射混凝土喷填密实。钢架保护层厚度不小于()㎝。
A.2.0
B.4.0
C.6.0
D.8.0
![](https://static.youtibao.com/asksite/comm/h5/images/m_q_a.png)
B、4.0
![](https://static.youtibao.com/asksite/comm/h5/images/solist_ts.png)
A.2.0
B.4.0
C.6.0
D.8.0
B、4.0
A.400mm×200mm
B.300mm×200mm
C.300mm×300mm
D.40mm×40mm
A.经常浸水或长期浸水的路堤边坡,宜采用植物防护
B.坡面喷射混凝土面层应在长度方向上每50m设伸缩缝,缝宽10~20mm
C.锚杆挂网喷射混凝土防护施工中,钢筋网与岩面的间隙宜为30~50mm
D.水泥混凝土预制块护坡每20~30m应设置一道伸缩缝,缝宽宜为10~20m
A.1m
B.2m
C.3m
D.4m