选煤厂主厂房屋盖网架施工.doc

选煤厂主厂房屋盖网架施工

山西古交矿区西曲选煤厂主厂房屋面网架为双向正交斜放四角锥网架,长56m,宽35m,高3m。
下弦网格3.5m,上弦网格2.745m。
网架采用焊接球节点,钢球直径360mm。
壁厚分16mm和10mm两种。
杆件为无缝钢管,最大Ф194×12,最小Ф76×3.5。
球和杆件均为Q235钢,杆件与球采用剖口对焊连接。

网架四周简支于标高34.780m的钢筋混凝土框架梁上。
支座形式为单面弧形压力支座。
设计要求网架双向起拱,拱高140mm。

网架自重78t,用钢量约40kg/m2。
网架下弦节点悬挂2台5t电动单梁起重机,跨度14m。

Qu Gujiao mining area in Shanxi Coal Preparation Plant, West Main Building roof rack for the bi-orthogonal diagonal square pyramid grid length 56m, width 35m, high-3m. Last quarter grid 3.5m, winding grid 2.745m. Grid node, using solder balls, ball diameter of 360mm. Two kinds of sub-16mm and 10mm wall thickness. Bar of seamless steel pipe, the largest Ф194 × 12, the smallest Ф76 × 3.5. Ball and bar are Q235 steel, bars and balls butt connection with profile control port.
Grid around the simply-supported at the elevation of 34.780m of reinforced concrete frame beam. Bearings in the form of single-sided arc pressure bearings. Design requirements for a two-way grid bagging, arch high 140mm.
Grid weight 78t, steel about 40kg/m2. Node grid last quarter hanging two sets 5t electric single-girder crane, span 14m.