Planning and Execution of Lift-Up Construction for Roof of Large-Scale Single-Layer Latticed Dome

The Nagoya Dome currently under construction is a ball park featuring the world's largest single-layer latticed dome roof with a daylight admitting-and-cutting facility in its center. Because of the roofs iron frame having all of its splices connected by welding, the erection of the roof required highly sophisticated technology and precision accuracy. Before the work on its construction began, elaborate discussions were held on the installation plans and accuracy management. One of the chief characteristic features of this project was the adoption of the lift-up method for the erection of the roof. The project involved the use of 72 hydraulic jacks to lift-up a large-scale roof weighing approximately 10,300 tons as the first experience in the construction field. Numerous technological development programs were conducted, including synchronized control of many jacks and multiple-point instrumentation. This accounted for the successful work of erecting the roof and lifting it with the desired results attained, including a shorter construction period and the prescribed level of accuracy.