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ID:10878850
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页数:14页
时间:2018-07-08
《支模架搭设施工方案》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、支模架搭设施工方案编制审核批准某建设实业有限公司某大楼顶目部二0一二年五月八日141、工程概况:某大楼工程为20层框架剪力墙结构,总建筑面积19800m2;裙房3878m2。各现浇楼面层高一般为3.5~5.85m,板厚100~160。中庭和通廊高度达到9.45~12.00m。2、脚手架设计2.1北面中庭顶板支模架设计:北面中庭顶板支模架搭设高度11.9m,楼板厚度100mm,最大梁高800mm。施工中支模架采用ø48×3.5焊缝钢管搭设,模板采用18厚胶合板,设计步距1800mm(7步架),跨距板下为800×800,梁下为500×500,现对立杆稳定性验算如下:2.1.1荷载计算
2、:2.1.1.1单根脚手架自重立杆11.9×37.6=447N(板)11.2×37.6=421N(梁)横杆0.8×7×2×37.6=421N(板)0.5×7×2×37.6=263N(板)扣件7×2×13.2+5×18.4+2×14.6=306N447+421+306=1.174KN(板)421+263+306=0.99N(梁)2.1.1.2模板自重标准:1KN×0.8×0.8=0.64KN(板)141KN×0.5×0.5=0.25KN(梁)2.1.1.3新浇砼楼面自重:2.4×9.8×0.1×0.8×0.8=1.51KN(板)2.4×9.8×(0.8×0.5×0.4+0.1×0.
3、5×0.1)=3.88KN(梁)2.1.1.4钢筋自重:1.1×0.8×0.8=0.7kN(板)(8×2.99×0.5+4×1.21×0.5+3×2.4×0.395)×9.8=150N(梁)NGK=1.174+1+1.51+0.7=4.384KN(板)NGK=0.99+0.25+3.88+0.15=5.27KN(梁)2.1.1.5施工及设备荷载标准:NQK=3×0.8×0.8=1.92KN(板)NQK=3×0.5×0.5=0.75KN(梁)单根立杆轴力为:N1=1.2×4.384+1.4×1.92=7.9488KN(板)N2=1.2×5.27+1.4×0.75=7.374KN(梁
4、)因N1>N2,只需验算N1即可。2.1.2立杆稳定性验算:L0=h+2a=1.8+2×0.15=2.1mi=1.58cm入=L0/i=2.1×100/1.58=132.9查表得j=0.374NjA0.374*489=7.9488*1000=43.46N/mm25、下:2.2.1荷载计算:2.2.1.1单根脚手架自重立杆9.3×37.6=350N(板)8.65×37.6=325N(梁)横杆1.2×8×2×37.6=720N(板)0.6×8×2×37.6=360N(梁)扣件6×2×13.2+3×18.4+1×14.6=228N350+720+228=1.298KN(板)325+360+228=0.913KN(梁)2.2.1.2模板自重标准:1KN×1.2×1.2=1.44KN(板)1KN×0.6×0.6=0.36KN(梁)2.2.1.3新浇砼楼面自重:2.4×9.8×0.1×1.2×1.2=3.386KN(板)2.4×9.8×(0.8×0.66、×0.4+0.1×0.6×0.2)=4.8KN(梁)142.2.1.4钢筋自重:1.1×1.2×1.2=1.58KN(板)(8×2.99×0.6+4×1.21×0.6+3×2.4×0.395)×9.8=197N(梁)NGK=1.298+1.44+3.386+1.58=7.704KN(板)NGK=0.913+0.36+4.8+0.197=6.27KN(梁)2.2.1.5施工及设备荷载标准:NQK=3×1.2×1.2=4.32KN(板)NQK=3×0.6×0.6=1.08KN(梁)单根立杆轴力为:N1=1.2×7.704+1.4×4.32=15.3KN(板)N2=1.2×6.27+17、.4×1.08=9.036KN(梁)因N1>N2,只需验算N1即可。2.2.2立杆稳定性验算:L0=h+2a=1.7+2×0.15=2mi=1.58cm入=L0/i=2×100/1.58=126.615.3×103查表得j=0.384NjA0.384×489==81.5N/mm2
5、下:2.2.1荷载计算:2.2.1.1单根脚手架自重立杆9.3×37.6=350N(板)8.65×37.6=325N(梁)横杆1.2×8×2×37.6=720N(板)0.6×8×2×37.6=360N(梁)扣件6×2×13.2+3×18.4+1×14.6=228N350+720+228=1.298KN(板)325+360+228=0.913KN(梁)2.2.1.2模板自重标准:1KN×1.2×1.2=1.44KN(板)1KN×0.6×0.6=0.36KN(梁)2.2.1.3新浇砼楼面自重:2.4×9.8×0.1×1.2×1.2=3.386KN(板)2.4×9.8×(0.8×0.6
6、×0.4+0.1×0.6×0.2)=4.8KN(梁)142.2.1.4钢筋自重:1.1×1.2×1.2=1.58KN(板)(8×2.99×0.6+4×1.21×0.6+3×2.4×0.395)×9.8=197N(梁)NGK=1.298+1.44+3.386+1.58=7.704KN(板)NGK=0.913+0.36+4.8+0.197=6.27KN(梁)2.2.1.5施工及设备荷载标准:NQK=3×1.2×1.2=4.32KN(板)NQK=3×0.6×0.6=1.08KN(梁)单根立杆轴力为:N1=1.2×7.704+1.4×4.32=15.3KN(板)N2=1.2×6.27+1
7、.4×1.08=9.036KN(梁)因N1>N2,只需验算N1即可。2.2.2立杆稳定性验算:L0=h+2a=1.7+2×0.15=2mi=1.58cm入=L0/i=2×100/1.58=126.615.3×103查表得j=0.384NjA0.384×489==81.5N/mm2
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