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1、網(wǎng)架整體起吊方案一、概況分析:本方案按使用2輛160噸吊車進(jìn)行計(jì)算,現(xiàn)根據(jù)現(xiàn)場(chǎng)情況,與吊裝公司技術(shù)人員共同協(xié)商,為確保安全起見,計(jì)劃使用2輛200噸吊車進(jìn)行整體起吊。(1)方案確定后,乙方技術(shù)人員與吊車司機(jī)到施工現(xiàn)場(chǎng)進(jìn)行勘察,確定最佳起吊方案。(2)起吊時(shí)必須由專業(yè)起重工統(tǒng)一指揮下令。(3)乙方施工人員積極配合吊車司機(jī)進(jìn)行起吊,把周圍障礙物提前清除,保證吊車順利進(jìn)行。(4)起吊到一定高度時(shí),乙方施工人員應(yīng)佩戴安全帶與防滑鞋,在網(wǎng)架上進(jìn)行封邊就位。二、吊點(diǎn)選擇:吊點(diǎn)位置三吊點(diǎn)繩栓設(shè)如圖吊點(diǎn)必須十字對(duì)角拴在網(wǎng)架上弦球節(jié)點(diǎn)上,嚴(yán)禁在網(wǎng)架桿件上栓繩打扣。起重前要求在吊點(diǎn)部位進(jìn)行
2、加固防止吊裝變形。四吊車站位及吊重分析吊車站位圖吊車吊臂及工作半徑示意圖起重機(jī)起重性能表常用復(fù)合鋼絲吊裝繩技術(shù)參數(shù)直徑mm鋼絲總斷面積mm2參考重量kg/100m鋼絲繩公稱抗拉強(qiáng)度kgf/mm2鋼絲繩鋼絲140155170185200鋼絲破斷拉力總和(kgf>=)8.70.427.8826.213900432047305150557011.00.543.5740.966090675074008060871013.00.662.7458.988780972010650116001250015.00.785.3980.2711950132001450015750170501
3、7.50.8111.53104.8156001725018950206002230019.50.9141.16132.7197502185023950261002820021.51.0174.27163.8243502700029600322003485024.01.1210.87198.22950032650358003900042150各種起重、提升和牽引設(shè)備。繩6×37股(1+6+12+18)繩纖維芯直徑(毫米)鋼絲總斷面積(毫米2)鋼絲繩參考重量(公斤/100米)鋼絲繩公稱抗拉強(qiáng)度(公斤/毫米2) 鋼絲繩 綱絲140155170185200鋼絲破斷拉力總和(公斤
4、)>=8.70.427.8826.213900432047305150557011.00.543.5740.966090675074008060871013.00.662.7458.988780972010650116001250015.00.785.3980.27119501320014500157501705017.50.8111.53104.8156001725018950206002230019.50.9141.16132.7197502185023950261002820021.51.0174.27163.824350270002960032200348502
5、4.01.1210.87198.2295003265035800390004215026.01.2250.95235.9351003885042650464005015028.01.3294.52276.8412004565050050544505890030.01.4341.57321.1478005290058050631506830032.51.5392.11368.6548506075066650725007840034.51.6446.13419.4624506915075800825008920036.51.7503.64473.47050078050856
6、009315010050039.01.8564.63530.879000875009595010400011250043.02.0697.08655.39755010800011850012850013900047.52.2843.47792.9118000130500143000156000 52.02.41003.80943.6140500155500170500185500 56.02.61178.071107.4164500182500200000217500 60.52.81366.281284.3191000211500232000252500 65.03.
7、01568.431474.3219500243000266500290000 吊裝性能驗(yàn)算:吊裝鋼絲繩的選擇:網(wǎng)架總重約為28噸,需整體起吊重量約20噸,吊裝采用2根鋼繩、4點(diǎn)吊裝(見吊裝示意圖)。每根鋼絲繩受力按吊索夾角60度計(jì)算,選用6×37,直徑為21.5mm,公稱抗拉強(qiáng)度200kg/mm2的鋼絲繩,每根鋼絲繩長(zhǎng)12m。計(jì)算如下:(1)首先計(jì)算環(huán)鏈破斷拉力Pp(N)Pp=382d^2=382*25^2=238750(N)(d為環(huán)的直徑取25mm)(2)鋼絲繩破斷拉力Pp(N)Pp=0.3σd^2=0.3*1400*21.5=1941