53.575454.070454.56045355.05345355.54840326.043.53730277.036322623.5228.030282320.519109.0252520.51817101010.0212118.51615101012.015.7151312101014.011.511.610.59.78.68.616.08.58.88.587.57.518.06.76.76.56.66.620.04.9555.95.922.03.43.63.64.44.924.02.42.43.23.826.01.51.52.22.828.01.4230.01.375吨吊车副吊臂额定提升负荷主吊臂角度(度)付吊臂长度(米)9.51580537853754.52.5703.71.8652.71.360215510.73.3吊点绳的规格、数量选择选用Ф21.5(6×37),公称抗拉强度为1850MPa的普通钢丝绳的破断拉力为322kN做为吊点绳。吊点绳数量采取两点绑扎。吊装荷载:Fmax=G=mg=7t×10=70kN采用2结点绑扎,即单根钢丝绳拉力F1=Fmax/2=35kN,钢丝绳的允许拉力[Fg]=aFg/K式中[Fg]:钢丝绳的允许拉力,取[Fg]=35kNa:钢丝绳的换算系数,取a=0.82Fg:钢丝绳的钢丝破断拉力总合K:钢丝绳的安全系数,取K=4.5Fg=[Fg]K/a=35×4.5/0.82=192kN当吊索与构件吊装夹角在450-600间时其夹角折合系数为0.71-0.61,即拉力为:270-315kN之间。根据6×37钢丝绳的主要机具表,吊装可选用直径为φ21.5mm,公称抗拉强度为1850kN/mm2(322kN)以上的6×37的钢丝绳即可满足要求。4吊装施工方法4.1施工流程图吊车进场及运输道路修筑塔材运输人工组片吊车进场吊装塔片封铁安装核对塔材
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