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按规定,楼梯混凝土施工缝的位置,应留在楼梯长度中间的1/3范围内。但事实上这一点很难做到。这是因为在一般情况下,多层住宅的楼梯往往随着建筑物的主体同时施工,分开施工对以后各道工序均不利。这样,当浇筑下层梁板及楼梯混凝土时,上层楼梯还没法支模。因此,不能考虑在上一折楼梯长度的1/3范围内留施工缝。如果把施工缝留在下一折楼梯,那就不能使梁板现浇混凝土与楼梯混凝土相互衔接,除非在楼梯间平台板上再留一道施工缝。事实上没有这样的做法。鉴于这些因素,这个问题一直成为
According to regulations, the position of concrete construction joints for stairs shall be within 1/3 of the length of the stairs. But in fact this is hard to do. This is because under normal circumstances, the stairs of a multi-storey residential building are often constructed along with the main body of the building. Separate construction will be detrimental to subsequent processes. In this way, when the lower slabs and the concrete of the stairs are cast, the upper stairs cannot be supported. Therefore, it cannot be considered to leave construction joints within 1/3 of the length of the previous folding staircase. If the construction joints are left on the next folding staircase, the cast-in-place concrete of the beam and the concrete of the staircase cannot be connected to each other unless a construction joint is left on the platform platform of the stairwell. In fact there is no such thing. Given these factors, this issue has always been