隧道进出口两侧______范围内,宜栽植高大乔木;桥头或涵洞两头______范围

题库2022-08-02  27

问题 隧道进出口两侧______范围内,宜栽植高大乔木;桥头或涵洞两头______范围内,不宜栽植乔木。()A.20~30m;10~15mB.20~30m;5~10mC.30~50m;10~15mD.30~50m;5~10m

选项 A.20~30m;10~15m
B.20~30m;5~10m
C.30~50m;10~15m
D.30~50m;5~10m

答案 D

解析 隧道进出口两侧30~50m范围内,宜栽植高大乔木,尽可能形成隧道内外光线的过渡段,以利车辆安全行驶。桥头或涵洞两头5~10m范围内,不宜栽植乔木,以免根系破坏桥(涵)台。
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