Symmetrical rotation accumulative sliding method for space chord truss structure

The invention discloses a symmetrical rotation accumulative sliding method for a space chord truss structure. The symmetrical rotation accumulative sliding method comprises the following steps: firstly, erecting a central anti-torsion bearing frame, installing an inner ring truss on the upper part of the central anti-torsion bearing frame, assembling a first sliding unit truss and a latticed column, assembling a second sliding unit and assembling a third sliding unit; and conducting gradual accumulative sliding installation according to the steps until the last unit, namely a ninth unit, is assembled, and at the moment, completing assembling of a main hall roof. A center ring truss is installed firstly, then the sliding units are slid one by one, the sliding angle is 18 degrees each time, and the sliding units are installed until the ninth unit is installed in a gradual accumulative sliding mode; and therefore, a traditional circular space chord truss installation method is changed, and the installation effic