碧桂园温泉小区二期工程58#住宅楼 脚手架施工方案
悬臂比值为λ＝
m500??0.1 l500011 故得跨中弯矩为M?ql2(1??2)2??1410?52?(1?0.12)2
88 ＝4318.6N·m ［10槽钢的截面抵抗矩为Wn＝39.7㎝3
Wnf=39.7×215=8535.5 N·m＞4318.6N·m ∴安全
6.2计算主梁
按构造计算荷载，以［20槽钢作主梁，长3.9m。 外侧主梁的支座反力为：
11 R外＝ql(1??)2??1410?5.5?(1?0.1)2?4691.8N
22 为安全计，按第二道钢丝绳不起作用，所以拉结的槽钢也不起作用考虑，
得等效均布荷载为4691.8N／0.5m＝9383.6N/m ［20槽钢自重260×1.2＝312 N/m 荷载设计值为 9383.6+312＝9695.6N/m
外侧主梁弯矩为
［20槽钢截面抵抗矩为Wn=191㎝3
Wnf=191×215=41065 N·m＞18433.8 N·m ∴安全 6.3钢丝绳验算
每个侧面采用两根6×37+1直径24.5㎜的钢丝绳。现仅以外侧一根受力作计
算。取钢丝绳强度极限为1700N／㎜2，其破断拉力总和为358kN，换算系数
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碧桂园温泉小区二期工程58#住宅楼 脚手架施工方案
0.82。取钢丝绳夹角为45°。
主梁上等效均布荷载标准值为4691.8／0.5＝9383.6 N/m ［20槽钢自重260 N/m 荷载标准值 96956 N/m
钢丝绳所受拉力为
钢丝绳的安全系数为 K＝358000×0.82／27009＝10.87 ∴安全 6.4拉环计算
拉环采用Ⅰ级钢筋制作，严禁使用冷加工钢筋，拉环埋入深度不应小于30d并应焊接或绑扎钩住结构主筋，每个拉环可按两个截面计算，拉环应力不应大于50N／㎜2。
选φ20，A＝314㎜2＞270.09㎜2 ∴安全
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目 录
1.编制依据············································1 1. 1施工组织设计·····································1 1. 2主要规范·········································1 2.工程概况············································1 2. 1建筑设计简介·····································1 2.2结构设计简介·····································2 2.3施工难点·········································2 3.施工准备············································3 3.1材料准备·········································3 3.2人员准备·········································3 4.施工方案············································4 4.1室外防护架·······································4 4.2室内操作架·······································7 4.3电梯井筒·········································7 4.4悬挑阳台的支撑···································7 4.5倒料平台·········································8 4.6马道·············································8 4.7外用电梯·········································8 4.8洞口及临边安全防护·······························8 5.主要的施工方法及技术要求···························9 5.1搭设方法········································9
5.2搭设要求········································10 5.3架子支搭顺序····································10 5.4脚手架拆除······································11 6.脚手架受力验算·····································11 7.安全技术措施·······································11 7.1通用安全规定····································11 7.2倒料平台安全规定································12 附录一 脚手架计算书······························13 附图：
附图一 脚手架首层平面布置图
附图二 脚手架二层至十六层平面布置图 附图三 脚手架顶层平面布置图 附图四 脚手架立面布置图
附图五 脚手架、連墙件加固节点图 附图六 脚手架卸荷加固节点 附图七 倒料平台平面构造图 附图八 倒料平台侧面构造图