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住宅工程楼梯间的构造决定了其外墙圈梁与楼层圈梁(即一般部位的圈梁)标高存在差异(图1,一般相差半个楼层高度),因而不能与楼层圈梁同时施工。楼梯间外墙圈梁如果采用预制安装方法施工,可以解决这一问题。 一、两种施工方法比较 采用现浇方法时,外墙主体的施工顺序一般是:绑扎构造柱钢筋→砌筑楼梯间外墙砌体(QL_1以下部分)及楼层砌体(QL_2与QL_3之间),留置拉结筋→QL_1及QL_3钢筋绑扎、支模,QL_1以下构造柱支模→QL_1及QL_1以下构造柱混凝土浇筑和养护、拆除QL_1侧模→砌筑楼梯间砌体(QL_1以上部分),留置拉结筋→支构造柱(QL_1以上部分)及QL_3模板→浇筑构造柱(QL_1以上部分)及QL_3混凝土。
The structure of a residential project stairwell determines that there is a difference in elevation between its outer ring beams and floor ring beams (that is, the ring beams in general parts) (Figure 1, generally differing by half the height of the floor), and therefore cannot be constructed simultaneously with floor ring beams. The use of prefabricated installation methods for stairwell external wall beams can solve this problem. First, the comparison of two construction methods using cast-in-place methods, the construction sequence of the main body of the outer wall is generally: tied steel bar of the structural column → masonry stairway exterior wall masonry (below the QL_1) and floor masonry (between QL_2 and QL_3 ), Indwelling buckling bars → QL_1 and QL_3 rebar lashing, supporting molds, below QL_1 structuring post mold → QL_1 and below QL_1 structuring columns concrete pouring and curing, removing QL_1 side dies, and masonry stairwell masonry (above QL_1) , Indwelling pull ribs → Supporting structural columns (above the QL_1) and QL_3 formwork → Pouring structural columns (above the QL_1) and QL_3 concrete.