选择题:隧道初期支护措施, 应紧随开挖面及时施作, 确保施工安全。下列关于初期支护说法错误的是()。

题目内容:

隧道初期支护措施, 应紧随开挖面及时施作, 确保施工安全。下列关于初期支护说法错误的是()。

A.Ⅳ级围岩必要时可加设钢支撑

B.Ⅲ级围岩支护可采用局部锚杆

C.钢支撑常用于软弱破碎围岩隧道中

D.喷射混凝土作为永久支护时必须配置钢筋网

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