【正文】
condary crane slowly within the same working radius. When portal frame is vertical, secondary crane will remove the hook and main crane will turn around to foundation direction.步驟四 step 4:主吊機(jī)回轉(zhuǎn)至基礎(chǔ)部位后,緩緩下降,直至安裝到位。big crane back to base position and lower slowly until installation is done.步驟五 step 5:鋼柱就位后,鋼架吊裝就位后,立即拉好風(fēng)繩,擰緊地腳螺栓螺母,摘除吊鉤。Temporary steady measures: when column is in position, set mooring rope and tighten anchor bolt and remove the hook.4.5.2 桁架的吊裝 erection of truss4.5.2.1 多層桁架形式一的吊裝 erection of multilayer truss one4.5.2.1.1 吊點的設(shè)置 setting of lifting points桁架的吊裝采用四吊點吊裝,吊點的位置對稱設(shè)置。Four symmetry lifting points will be set during erection of truss.4.5.2.1.2 吊機(jī)選型及工作況明細(xì) choice on crane多層桁架形式一吊裝作業(yè)參數(shù)明細(xì)表specification of erection of multilayer truss one桁架部位 重量(T ) 選用吊機(jī) 工作半徑 (m) 起重量 (T) 臂長(m) 起重高度 (m)AB 列 23 軸 113119 標(biāo)高 LTM1120 12 23AB 列 45 軸 113119 標(biāo)高 LTM1120 12 23AB 列 89 軸 113119 標(biāo)高 LTM1120 12 23AB 列 1011 軸 113119 標(biāo)高 LTM1120 12 234.5.2.1.3 吊裝示意圖 erection illustration:LTM1204.5.2.2 多層桁架形式二的吊裝 erection of multilayer truss two:4.5.2.2.1 吊點的設(shè)置型式一桁架。Setting of lifting point of type one truss4.5.2.2.2 吊機(jī)選型及工作況明細(xì) choice on crane and work analysis多層桁架形式二吊裝作業(yè)參數(shù)明細(xì)表specification of erection of multilayer truss two桁架部位 重量 (T) 選用吊機(jī) 工作半徑 (m) 起重量 (T) 臂長(m) 起重高度 (m)AB 列 23 軸 標(biāo)高 LTM1120 18 25AB 列 45 軸 標(biāo)高 LTM1120 18 25AB 列 89 軸 標(biāo)高 LTM1120 18 25AB 列 1011 軸 標(biāo)高 LTM1120 18 254.5.2.2.3 吊裝示意圖:LTM1204.5.2.3 井型桁架的吊裝 erection of wellshape truss4.5.2.3.1 吊點設(shè)置 setting of lifting point井型桁架的吊裝也采用四吊點吊裝,吊點的位置對稱設(shè)置。Four symmetry lifting points will be set during erection of well shape truss.4.5.2.1.2 吊機(jī)選型及工況明細(xì) choice on crane吊裝作業(yè)參數(shù)明細(xì)表working specification of crane for erection桁架部位 重量( T) 選用吊機(jī) 工作半徑 (m) 起重量 (T) 臂長(m) 起重高度 (m)AB 列 23 軸 標(biāo)高 LTM1120 14 27AB 列 45 軸 標(biāo)高 LTM1120 14 27AB 列 89 軸 標(biāo)高 LTM1120 14 27AB 列 1011 軸 標(biāo)高 LTM1120 14 274.5.2.1.3 吊機(jī)站位示意圖:setting of craneLTM120張 家 港 路4.5.3 零散構(gòu)件吊裝 erection of spare members 散件的吊裝采用 25 噸吊機(jī)進(jìn)行。25T crane will be used up erection of spare members.五、高強(qiáng)螺栓施工藝 HSB Technique5.1 一般規(guī)定 General requirement5.1.1 高強(qiáng)度螺栓連接在施工前應(yīng)對連接副實物和扭矩系數(shù)進(jìn)行檢驗和復(fù)驗,合格后才能進(jìn)入安裝施工。The high strengthen bolt and friction surface need to be inspected and retested before application, and it can only been used when accepted. 5.1.2 對每一個連接節(jié)點,若螺栓無法正常穿入,應(yīng)先用鋼沖定位,鋼沖的數(shù)量使螺栓能使螺栓正常自由穿入為宜,但不得少于三個。A connection for each node, if the bolt does not perate, red steel should be positioned so that the number of red steel bolts bolt can perate normal free appropriate but no less than three.5.1.3 高強(qiáng)度螺栓的穿入,應(yīng)在結(jié)構(gòu)中心位置調(diào)整后進(jìn)行,其穿入方向應(yīng)以施工方便為準(zhǔn),力求一致;安裝時要注意墊圈的正反面,即:螺母帶圓臺面的一側(cè)應(yīng)朝向墊圈有倒角的一側(cè);對于大六角頭高強(qiáng)度螺栓連接副靠近螺頭一側(cè)的墊圈,其有倒角的一側(cè)朝向螺栓頭。The HSB will be adjusted after the adjustment on center of steel members, and the direction shall keep consistence based on the convenience for erection。 Pay attention to two sides of washer, which means the side of washer with chamfer shall match to the side of nut with round surface and head of bolt.5.1.4 高強(qiáng)度螺栓的安裝應(yīng)能自由穿入孔,嚴(yán)禁強(qiáng)行穿入,如不能自由穿入時,該孔應(yīng)用鉸刀進(jìn)行修整,修整后孔的最大直徑應(yīng)小于 倍螺栓直徑。修孔時,為了防止鐵屑落入板迭縫中,鉸孔前應(yīng)將四周螺栓全部擰緊,使板迭密貼后再進(jìn)行,嚴(yán)禁氣割擴(kuò)孔。 The HSB shall be put into the holes freely, and put forcedly is not allowed. If the hole did not match, it needs to be adjusted by reamer, and the Max. diameter shall less than times of bolt diameter. During the adjustment, in order to avoid scrap falling down, other bolts around have to been tighten to ensure there is no space or clearance when hole enlarging. Gas cutting is not allowed.5.1.5 高強(qiáng)度螺栓連接中連接鋼板的孔徑略大于螺栓直徑,并必須采取鉆孔成型方法,鉆孔后的鋼板表面應(yīng)平整、孔邊無飛邊和毛刺,連接板表面應(yīng)無焊接飛濺物、油污等,螺栓孔徑及允許偏差見表。Bolt hole on steel members shall larger than bolt diameter, and the hole shall be drilled by drilling machine. The plate shall be flat, and the holes shall be no burrs or spatter. The hole diameter and tolerance see below:高強(qiáng)螺栓連接構(gòu)件制孔允許偏差Hole diameter and tolerance of steel members名稱 Item 直徑及允許偏差(mm)Diameter amp。 Tolerances (mm)直徑Diameter 12 16 20 22 24 27 30螺栓 Bolt 允許偏差Tolerances 177。 177。 177。直徑Diameter 22 (24) 26 (30) 33螺栓孔Bolt hole允許偏差Tolerances+0+ 0+ 0圓度(最大和最小直徑之差)Roundness (Difference between Max. amp。 Min.) 中心線傾斜角Incline angle of center line應(yīng)不大于板厚的3%,多層板迭組合不得。≤ 3% of plate thickness. The Max. ≤ for single plate, and the Max. ≤ mm for multiple plates.5.1.6 各國高強(qiáng)度螺栓性能對比表。(檢測時參考)Comparison sheet of HSB Performance (Reference standard)國家Origin 標(biāo)準(zhǔn)Standard性能等級Class 抗拉強(qiáng)度(MPa)Tensile strength延伸率Elongation硬度HRC中國China GB1213 、 81040 10 2431A325 844 14 23-32美國 A490 1055 14 32-38日本Japan JI 1311B6 F8T、F10T 800-1000 16 18-31德國Germany DIN267 10K 1000-1200 85.1.7高強(qiáng)度螺栓連接構(gòu)件的孔距允許偏差。 (檢測時參考)Tolerance of hole pitch on HSB connected members (Reference standard)螺栓孔距 Hole pitch項次Item 項目Description 500 5001200 12003000 30001 同一組間任意兩空間 Any distance within same group 177。 177。 2 相鄰兩組間的端空 End distance of adjacent groups允許偏差Tolerance 177。 177。 + 177。5.2 安裝前的檢查工作 inspection work before installation5.2.1 檢查項目 Inspection items5.2.1.1 螺栓、螺母、墊圈均應(yīng)附有質(zhì)量證明書,并應(yīng)符合設(shè)計要求和國家標(biāo)準(zhǔn)的規(guī)定。The HSB, nut and washer need attach the corresponding quality certificate, and shall meet the design requirement and GB standard.5.2.1.2 高強(qiáng)度大六角螺栓示意圖見圖 1。See below for bearingtype hexagon HSB.5.2.1.3 大六角頭高強(qiáng)度螺栓的規(guī)格、尺寸及重量應(yīng)符合表 1 的規(guī)定。The specification, size and weight of bolt shall meet the standard shown on Sheet 1.5.2.1.4 大六角高強(qiáng)度螺母的規(guī)格、尺寸及重量應(yīng)符合表 2 的規(guī)定。The specification, size and weight of nut shall meet the standard shown on Sheet 2.5.2.1.5 高強(qiáng)度墊圈的規(guī)格、尺寸及重量應(yīng)符合表 3 的規(guī)定。The specification, size and weight of washer shall meet the standard shown on Sheet 圖 1 高強(qiáng)度大六角螺栓示意圖Bearingtype hexagon HSB鋼結(jié)構(gòu)用大六角頭高強(qiáng)度螺栓的規(guī)格、尺寸及重量表 1Sheet 1 Specification, size and weight of bolt公稱尺寸Nominal size 12 16 20 (22) 24 (27) 30最大 Max. (mm)最小Min. E(mm) dw(mm) 最小