Research on construction techniques of cable dome roof

This paper focuses on the solution to the technical problems confronted during the construction process of the cable dome with a diameter of 71.2 m,i.e.the controlling of structural construction error,component size error,installation and shaping methods of structures,the order and method of pretensioning and the construction simulation and monitoring.The internal and middle ridge cables,internal and middle slope cables are fixed length cables.The outer ridge cable and the outer slope cable are variable length cables to adjust the construction error.On the basis of a brief summary of the construction experience abroad,it proposes the method of integral assembling on the ground and synchronous hoisting of outer ridge and slope cable,shaped by stretch the outer slope cable,which has reduced aerial work and guaranteed constriction security.Secondly,based on the theory that the cable dome is a flexible construction with several symmetry axis,the construction method of verified batches and levels was finally proposed,based on which,tension construction of the project was completed.From the monitoring data,the configuration of the actual structure was generally identical with the configuration designed.