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一、前言三峡工程是国家距世纪工程。它的建成可大大缓解华中地区的电力供应,是国家的重点工程之一。MQ2D00门机是三峡工程的中标项目,是大坝施工中的主力吊车。该机由郑州所和杭州所、吉林水工机械厂共同设计,水工机械厂生产。现场组塔采用先进的顶升技术,既可节省劳力又可使施工的安全性大大提高。但在计算中发现塔身主弦杆及耳板在顶升过程中应力很高,接近材料的屈服极限,耳板受力又十分复杂,常规的计算存在着
First, the foreword Three Gorges Project is the country from the century project. Its completion can greatly ease the power supply in Central China and is one of the key projects of the country. MQ2D00 door machine is the winning project of the Three Gorges Project, is the main crane in the dam construction. The aircraft by the Zhengzhou and Hangzhou, Jilin Hydraulic Machinery Factory common design, hydraulic machinery factory production. On-site tower tower using advanced jacking technology, both labor-saving and construction safety can be greatly enhanced. However, in the calculation, it was found that the main tower chord and the ear plate of the tower body have high stress in the process of ascending, close to the yield limit of the material, and the stress of the ear plate is very complicated. The conventional calculation exists