High-altitude tower crane in-situ conversion device and construction method

The invention provides a high-altitude tower crane in-situ conversion device and a construction method, and the conversion device is composed of a bracket, an upper lug seat, a lower lug seat, a connecting system, a supporting beam, an inclined strut, an inclined strut pin shaft, a hinged support, a hinged support pin shaft, a counter-force beam, a jack, a tower crane non-standard section and the like. And the vertical load of the middle-upper part of the tower crane is directly converted to the bracket through the combined action of the counter-force beam, the supporting beam and the jack, so that the high-altitude in-situ conversion of the tower crane is completed. The advantages of a ground tower crane and a high-altitude bracket tower crane are combined, the tower crane ground foundation and the high-altitude bracket foundation are fully utilized, and rapid switching of the tower crane in the air is achieved. According to the method, construction is simple, the conversion speed is high, the problem of mor