Super span spherical space frame installation construction

Spherical space frame structure has the advantages of beautiful, good overall performance, in some industrial plants, stadiums, airports and other large span structure is widely used, and the rods are connected by bolts, very convenient installation, with strong seismic performance. After using the spherical space frame structure, it plays a very good role in promoting the development of large-span and super-large-span construction engineering. With the deepening of application, the construction technology level is also improving rapidly, showing a high application value. An industrial factory building belongs to the super-span construction structure, the roof adopts the spherical space frame structure for construction, the total area is 5405.69 square meters, the construction is relatively difficult.

This space frame adopts the bolt-ball node four-angle cone space frame structure, bolt-ball node space frame is a new roof bearing structure, belonging to the statically indestructed space structure system for many times, this flat shape space frame, novel and beautiful structure, strong regularity of rods, unified frame, good integrity, large spatial stiffness, good seismic performance and easy to install. The roof is thermal insulation composite color board, 0.5mm thick aluminized zinc plate, 150mm thick glass fiber roll felt insulation layer, roof drainage is internal ditch and external drainage. The construction period of the industrial plant spherical space frame project is tight, the task is heavy, and there are many cross construction projects in the construction process, in the spherical space frame construction need to build scaffolding laying slip platform, but it will affect other processes. High altitude platform bulk and high altitude fragment slip method is not suitable for use; Due to the limitations of the installation site conditions (viaduct driveway in front, train track in rear), the installation and construction of the space frame does not have the use conditions of large lifting equipment, and the overall pre-lift installation method is not suitable for this project. After many argumentations, the construction technology of high-altitude bulk construction is adopted after assembling 1 span starting frame on the ground and overall lifting in place.

According to the actual situation of the site, through checking the bearing capacity, the ground assembling 1 span starting frame installation method is adopted. After the ground assembly is completed, a 300 ton truck crane is used for lifting; The starting frame is hoisted in place, the fixed position of the frame is adjusted and the temporary support is done, and the joint is made from the middle of the basic span to both ends, so that the force is transmitted to the periphery, and it is easy to adjust the height of the penalty spot of the frame section. Four 8-ton cranes on both sides are hoisted and constructed in parallel to the vertebral body until the installation of the space frame is completed.