105-meter-span roof space frame for the skating hall

The base of the skating hall is elliptical, and the top is streamlined. The building uses smooth aluminum plate lines as the essential elements of the design

The total construction area of the ice skating hall construction project is 18,000 square meters. The basement floor is a single-story large-span grandstand area on the ground. 31.83 meters, there is a standard 400-meter avenue speed skating field and two legal short-track speed skating fields.

The plane of the ice hall is an elliptical roof space frame, with a maximum structural span of 105.18 meters, a maximum cantilever length of 10.10 meters, and a total weight of about 1550 tons. Peripheral rigid structural columns support the space frame, and the support adopts finished sliding bearings. The construction is complicated.

Overall upgrade of steel structure space frame

During the hoisting process of the metal roof steel structure space frame, using the frame column structure and hydraulic lifting system, 8 hydraulic lifters are used for overall lifting, and each hydraulic lifter is equipped with a set of travel sensors. Synchronous control, any lifter The steel “warrior” whose shape is like an octopus climbing can be adjusted individually. In order to maintain a stable lifting posture, the components can be locked at any position to ensure process safety and quality controllable.

“Water wave” shape, staggered, ups and downs

The roof of the project has many staggered and undulating shapes, and it looks like an ellipse when viewed from above. It presents a multi-layered and interlaced high and low roof architectural form. From the perspective of the facade, it presents an ups-and-downs “water wave” shape. The overall shape of the roof is complex and the construction is difficult.

The project team established a three-dimensional space model of the steel structure, and carried out spatial positioning from the outside to the inside according to each functional layer, used BIM to simulate installation and on-site actual measurement to check each other, output the three-dimensional coordinates of the shape to generate on-site installation control coordinates, and pre-matched theoretical models for all components. For blanking and processing, the site strictly follows the control coordinate data for precise lofting, and the material components are accurately installed according to the three-dimensional data to ensure that the construction quality is excellent at the first time, and the project construction is promoted with high standards and high quality.

Guarantee the wind resistance performance of the metal roof

In the design stage, according to the wind tunnel test report, the project team adopted plug-in and slidable joints for the overall structure, added aluminum alloy flashing sliding ends in the roof gutter area, and adjusted the roof eaves, roof ridge, roof gutter oblique cut positions and other The steel skeleton and support in the area where the wind load is concentrated are densified, and windproof lock clips are installed at the roof slab ribs, gutters, and high and low span facades. During the construction of the roof slab in the weak wind resistance area, multiple edge closures are carried out, and at the same time Encrypted rivets fix the aluminum alloy drip sheet to strengthen the wind resistance performance of the end to ensure the construction quality

Ensure metal roof drainage and waterproofing

The roof of the project has a large water catchment area and many roof undulations. There are a large number of oblique cuts of the outer roof panel and the gutter, and the high and low spans of the roof panel, resulting in a relatively complicated roof drainage path. The joint between the roof and the curtain wall involves multiple systems and multiple Professional cross construction, while the gutter expansion joints are rigidly connected, making on-site waterproofing difficult.

The project team analyzed the model through contour lines, qualitatively determined the main flow of roof drainage to a reasonable drainage path, combined with software simulation to quantitatively analyze the drainage slope of each area of the roof, and at the same time reduced roof panel cutting and aluminum welding operations, and roof panel seam layout On the back side of the drainage direction, set a water collection well and a water retaining plate, set a butyl film under the heat insulation pad of the support, and apply a weather-resistant sealant around it, so that the support and the purlin are fastened to form a complete waterproof airtight layer, strengthening the high and low spans The joint waterproof ability of the façade and the roof should be protected against trampling and finished products during construction to ensure that the roof is effectively waterproof and well-drained.