懸挑式鋼平臺設計方案.doc
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懸挑式鋼平臺設計方案
一、工程概況：
蘇州工業園區東湖大郡Ⅰ標段工程由蘇州工業園區建屋發展有限公司開發，中國建筑西南勘察研究院（蘇州）勘察設計，蘇州市建筑設計研究院設計，江蘇蘇中建設集團股份有限公司承建。工程抗震設計烈度六度。建筑抗震設防類別為丙類建筑，建筑結構安全等級為二級，結構使用年限為50年。
砌筑磚墻及粗裝修材料運輸比較困難，在塔吊起吊范圍內擬搭設懸挑式鋼平臺。
為確保工期安全，現依據國家JGJ80-91有關鋼平臺規定，擬定安裝懸挑式鋼平臺。
二、鋼平臺設計
1、設計的鋼平臺面積：
可利用平臺面積為10.05m2（其中走道平臺2.43m2）（見圖）
2、設計荷載：
（1）、平臺自重不大于0.74T，滿足塔機最大幅度吊運對荷載要求：
A、[16槽鋼24m×19.74kg/m=473.76kg
B、∠80×80角鋼3.6m×8.5kg/m=30.6kg
C、∠50×50角鋼13.6m×3.77kg/m=51.3kg
D、多層膠合板0.18m3×400kg/m3=72kg
E、欄桿、附平臺短件估100kg
（2）、活荷載為1500N（一部運輸小拖車和1-2人）。
Cantilevered steel platform design
1, Project Overview:
Great East Lake in Suzhou Industrial Park project by the County Contract Ⅰ housing development of Suzhou Industrial Park Development Co., Ltd., China Construction Southwest Survey Institute (Suzhou) Survey and Design, Architectural Design Research Institute, Suzhou, Jiangsu Construction Group Corporation in the construction of the Soviet Union. Seismic Design of intensity degrees. Building earthquake-proof category C building, the security level for the two structures, structural service life of 50 years.
Thick masonry walls and decoration materials, transportation is difficult, in the context of the proposed erection of tower crane lifting steel cantilever platform.
To ensure the safety period are based on national JGJ80-91 provides the steel platform, developed to install cantilever steel platform.
Second, steel platform
1, the design of steel platform size:
Available platform area of 10.05m2 (which aisle platform 2.43m2) (see Figure)
2, design load:
(1), the platform weight is not greater than 0.74T, to meet the most significant lifting crane on the load requirements:
A, [16 channel 24m × 19.74kg / m = 473.76kg
B, ∠ 80 × 80 angle 3.6m × 8.5kg / m = 30.6kg
C, ∠ 50 × 50 angle 13.6m × 3.77kg / m = 51.3kg
D, multi-layer plywood 0.18m3 × 400kg/m3 = 72kg
E, railings, with a platform for short pieces of estimated 100kg
(2), live load was 1500N (a small trailer and transport 1-2 people).