搜题

拱圈砌筑砂浆或混凝土强度达到设计强度的( )时,方可拆除拱架。

二建公路工程实务 2023-05-13

A.75%
B.85%
C.95%
D.100%

参考答案:B

2020版教材P151
拱圈砌筑的砂浆或混凝土强度达到设计强度的85%时,方可拆除拱架,且在拱架拆除时应先完成拱脚以下部分回填土的填筑;达到设计强度100%后,方可进行拱顶填土。
在拱架未拆除情况下,拱圈砌筑的砂浆或混凝土强度达到设计强度的85%时,可以进行拱顶填土,但在拱圈强度达到100%后,方可拆除拱架。

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