4.扣件式钢管脚手架.doc
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4、veryone has accountability. Four, future direction and improvement measures 1, belief and faith, strengthen party spirit. One is to firmly establish the noble ideals of struggle for the ideals of communism, communist struggle for life, ready to sacrifice everything for the party and the people. Seco
5、nd is to continuously improve the quality and standard of political, conscientiously study Deng Xiaoping theory and three represents important thought and the scientific Outlook on development, implement the partys basic program for the primary stage of socialism, adhere to the correct political ori
6、entation, maintain highly consistent with the CPC Central Committee, is good at theories of socialism with Chinese characteristics to analyze and solve problems. Third, strengthening the party spirit and the world transformation, perseverance of the party Constitution, relive Party vows to establish
7、 correct world Outlook, Outlook on life and the world, practically embodies ideals and beliefs into action, combine lofty ideals and practical activities, transforming the objective world, actively participate in the great practice of building socialism with Chinese characteristics. 2, keep the purp
8、ose in concept, changing the style of work. First, keep in mind that the purpose of serving, adhere to assuming power for the people, keep in mind the people and care about people, and the joys and sorrows of the masses, .According to city discipline, and municipal organization Department requiremen
9、ts, today we held implement implementation independent Commission against corruption guidelines effective strengthening led cadres style construction topic democratic life, main task is close contact thought, and work actual, control check district Standing Committee team and the personal in impleme
10、ntation independent Commission against corruption guidelines Shang exists of problem, in-depth carried out criticism and self-critical, further clear rectification direction and measures, effective enhanced clean politics of consciousness and initiative, firm set good of ruling image. Before the mee
11、ting, the way we take surveys solicited a views, combed, related to team building4.扣件式钢管脚手架4.7.1设计内容为使扣件式钢管脚手架满足安全适用经济合理的要求,施工之前,应按本章要求对脚手架进行设计计算并编入施工组织设计,设计内容一般应包括:1. 脚手架的几何尺寸,包括脚手架的排距、步距、柱距、连墙件的间距及搭设高度、长度。(1) 敞开式脚手架可直接按表4-8或表4-44、表4-45采用,不用再进行计算;(2) 封闭式和半封闭式脚手架要根据本章4.4要求及本节给的计算方法计算确定。2. 脚手架的地基基础:(
12、1) 一般情况下,地基基础作法可按表4-10采用,不用再进行计算;(2) 当表4-10不能满足要求时,应按本章给的计算方法确定。3. 脚手架构造应按本章4.4要求进行构造设计,应包括:(1) 连墙件的构造作法、支撑设置要求;(2) 脚手架转角处、门洞处的构造作法;(3) 脚手架的防护作法及要去;(4) 其它必须强调说明的一些特殊构造。4. 脚手架分段搭设或分段卸荷的方案设计。5. 关于搭设、使用及拆除过程中的安全措施。6. 脚手架施工图。按上述要求绘制脚手架的平、立、剖面图及必要的节点构造详图。7.必要的设计计算资料。4.7.2荷载与荷载效应组合一、永久荷载(恒载)与可变荷载(活载)根据现行国
13、家标准建筑结构荷载规范GBJ987的规定,应将作用于扣件式脚手架上的荷载作用区分永久荷载与可变荷载。(一) 永久荷载(恒载)1. 作用于扣件式脚手架的恒载系指脚手架的结构自重,它包括组成脚手架结构的主要构件、立柱、纵向、横向水平杆,支撑杆件及连接它们的扣件重。2. 钢管、扣件单重应按表4-13采用3. 一个柱距范围内,每米高的单、双排脚手架的结构自重按下列共计计算:(1)单排架的立柱,纵向、横向水平杆及扣件重GS:4-1(2) 双排架的立柱,纵、横向水平杆及扣件重GD:4-2(3) 剪刀撑的杆件及扣件重GB: 4-3式(41),式(42)及式(43)中(参照图4-21):l脚手架的柱距(跨距)
14、(m);h脚手架的步距(m);g钢管单位长度自重(kN/m);g1一个直角扣件自重(kN);g2一个旋转扣件自重(kN);Hb剪刀撑的竖向尺寸(m);Lo剪刀撑的横向尺寸(m);a剪刀撑斜杆的倾角。4. 一个柱距范围内,每米高外脚手架结构宜按表4-14采用。钢管及扣件自重 表4-13钢管(kN/m)扣件(kN/个)483.5513.0直角扣件对接扣件旋转扣件0.03840.03550.01350.01850.0145一个柱距范围内的每米高外脚手架结构自重(kN/m)(钢管为483.5钢管) 表4-14柱距步距(m)1.201.351.501.802.001.2单排0.1930.1790.167
15、0.1490.140双排0.2980.2760.2580.2320.2181.5单排0.2070.1920.1790.1590.150双排0.3230.2990.2790.2490.2361.8单排0.2210.2050.1910.1710.160双排0.3470.3200.2990.2680.2522.0单排0.2320.2140.2000.1780.168双排0.3640.3340.3120.2800.2622.1单排0.2350.2180.2040.1810.176双排0.3720.3420.3190.2860.267注:1.当采用513.0钢管时,脚手架结构自重等于表中数据乘以0.95
16、。 2.表中脚手架结构自重包括立柱,纵、横向水平杆,剪刀撑杆件及连接它们的扣件自重。(二) 可变荷载(活载)可变荷载包括脚手架的附件、施工荷载及风荷载。1. 附件系指脚手板及防护物品(安全网、栏杆、挡脚板或其它防护材料)的自重。(1) 冲压钢板脚手架、不脚手架与竹串片脚手板自重应按表4-15采用。脚手板自重(标准值)类别标准值(kN/m2)冲压钢脚手板竹串片脚手板木脚手板0.300.300.40(2)栏杆、挡脚板的线荷载标准值应按表4-16采用。(3)脚手架上吊挂的安全设施(安全网、编制物、竹笆板等),应按实际情况进行计算。2. 施工荷载系指脚手架上存放的建筑材料,小型工具及操作人员的重力。装
17、修与结构施工脚手架操作层上的施工均布活荷载标准值,应按表4-17采用;其它用途脚手架的施工均布活荷载标准值,应根据实际情况参考表4-18确定。栏杆、挡脚板荷载标准值 表4-16类别标准值(kN/m2)栏杆、冲压钢脚手板挡板栏杆、竹串片脚手板挡板栏杆、木脚手板挡板0.1520.1520.180注:表中栏杆采用483.5钢管两道计算。施工局部活荷载标准值 表4-17类别标准值(kN/m2)装修脚手架结构脚手架2.03.0常用材料和构件自重 表4-18名称自重备注1砖、灰浆及混凝土(kN/m2)普通砖普通砖焦渣砖烟灰砖焦渣空心砖水泥空心砖水泥空心砖水泥空心砖瓷面砖马赛砖石灰砂浆、混合砂浆水泥砂浆水泥
18、蛭石砂浆膨胀珍珠岩砂浆素混凝土矿渣混凝土焦渣混凝土焦渣混凝土加气混凝土钢丝网水泥钢筋混凝土181912141415109.810.39.617.80.12 kN/m2172058715222420161710145.57.525242524011553(684块)机制砖炉渣:电石渣:烟灰30:40:30290290140(85块)290290140(85块)300250110(121块)300250160(83块)1501508(5556块)厚5mm振捣或不振捣承重用填充用单 块用于承重结构2.杂项(kN/m2)普通玻璃钢丝玻璃沥青蛭石制品水泥蛭石制品建筑垃圾木框玻璃窗钢框玻璃窗25.6263
19、.54.546150.20.30.40.45 3.风荷载:(1)垂直于脚手架表面的风荷载标准值应按下式计算:wK=0.7zsw。 (4-4)式中z风压高度变化系数,按表4-19采用;s脚手架风荷载体型系数,按第15章附录七的相应规定确定,其中敞开式脚手架s取其构架结构的风荷载体型系数stw。w。基本风压(kN/m2),应按国家现行标准建筑结构荷载规范的规定采用;全国各主要城市基本风压见表4-20。风压高度变化系z 表4-19离地面或海平面高度(m)地面粗糙度类别ABC5101520304050607080901001502002503003504001.171.381.521.631.801.
20、922.032.122.202.272.342.402.642.832.993.123.123.120.801.001.141.251.421.561.671.771.861.952.022.092.382.612.802.973.123.120.540.710.840.941.111.241.361.461.551.641.721.792.112.362.582.782.963.12全国各主要城市基本风压w。(kN/m2) 表4-20城市风压城市风压北京上海天津哈尔滨长春沈阳石家庄济南合肥南京杭州南昌武汉长沙福州0.350.550.400.450.550.500.300.350.300.35
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