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混凝土拆除之模板拆除注意事項

文字:[大][中][小] 手機頁面二維碼 2018-1-29     瀏覽次數:    

1.模板、支架和拱架拆除應符合下列規定:

(1)非承重側模應在混凝土強度能保證結構棱角不損壞時方可拆除,混凝土強度宜為2.5MPa以上。

(2)芯模和預留孔道內模應在混凝土抗壓強度能保證結構表面不發生塌陷和裂縫時,方可拔出。

2.漿砌石、混凝土砌塊拱橋拱架的卸落應遵守下列規定:

(1)漿砌石、混凝土砌塊拱橋應在砂漿強度達到設計要求強度80%以上后卸落拱架。

(2)跨徑小于10m的拱橋宜在拱上結構全部完成后卸落拱架;中等跨徑實腹式拱橋宜在護拱完成后卸落拱架;大跨徑空腹式拱橋宜在腹拱橫墻完成(未砌腹拱圈)后卸落拱架。

3.模板、支架和拱架拆除應遵循先支后拆、后支先拆的原則。

4.預應力混凝土結構的側模應在預應力張拉前拆除;底模應在結構建立預應力后拆除。


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