京西玉渊潭畔,405米高的中央电视发射塔,以其雄伟的身躯引得多方赞叹。为了让这“巨人”直起它“玉柱”般的身躯,采用了“内爬塔”施工。就是在建筑主体的中心安装一台大塔吊,原理类似“水涨船高”,发躲塔升高一段,塔吊自然也“升空一节”。当发射塔升高至322米处,施工塔吊就完成了自己的使命。然而,这座自重45吨,塔身长48米,塔前臂长30米,后臂7 Jingyu Yu Yuan Tan, 405-meter-high central television tower, with its magnificent body attracted many praise. In order for this “giant” Straight from its “Yuzhu” body, the use of “climbing tower” construction. It is in the center of the main building to install a large crane, the principle is similar to “rising”, hair tower to raise a period, tower crane naturally “lift a section.” When the tower rises to 322 meters, the construction crane has completed its mission. However, this deadweight 45 tons, tower 48 meters long, the tower forearm 30 meters long, 7 after the arm