炉窑砌筑时,起拱跨度大于6m时,拱和拱顶应打入( )锁砖。A. 1块 B. 2块 C. 3块 D. 5块

作者: rantiku 人气: - 评论: 0
问题 炉窑砌筑时,起拱跨度大于6m时,拱和拱顶应打入( )锁砖。
选项 A. 1块 B. 2块 C. 3块 D. 5块
答案 D
解析 P104 拱和拱顶施工技术要点 (1)必须从两侧拱脚同时向中心对称砌筑。砌筑时,严禁将拱砖的大小头倒置; (2)锁砖应按拱和拱顶的中心线对称均匀分布。跨度小于3m的拱和拱顶应打入1块锁砖,跨度在3~6m之间时,应打入3块锁砖;跨度大于6m时,应打入5块锁砖;
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