Located in Qimen County, Huangshan City, Qihong International‑Hotel is a landmark four‑star business‑hotel integrating high‑end guest‑rooms, large‑scale banquet‑hall, multi‑function conference‑hall, business‑reception and catering‑leisure services. It undertakes important government‑meetings, wedding‑ceremonies and commercial‑events, acting as a vital business‑exchange landmark of Qimen County. This space‑grid roof covers the large‑column‑free banquet‑hall with a construction‑area of 1,500 ㎡. Bolt‑ball flat‑plate steel‑grid‑structure is adopted for the roof, creating a wide‑open interior space suitable for thousand‑person banquets and various large‑scale activities.
The large‑span banquet‑hall grid roof contains numerous steel members and dense bolt‑ball joints. Major construction‑challenges include precision‑control of ground block‑assembly, high‑altitude hoisting, multi‑stage unloading and long‑term deflection‑monitoring. Situated in mountainous‑area of Southern‑Anhui, the site features abundant rainfall and high‑humidity, especially during the rainy plum‑season. Wind‑snow load calculation was carried out according to local construction‑codes. Comprehensive anti‑corrosion and fire‑protection scheme with hot‑dip‑galvanization is applied to grid‑members, bolt‑ball joints and support‑bases, preventing steel‑structure from moisture‑induced rust. Complete waterproof‑thermal‑insulation enclosure system and enhanced waterproof‑sealing for ridge‑and‑gutter joints eliminate roof‑leakage risks, ensuring long‑term safe‑operation of banquet‑hall roof.
We undertook the 1,500‑㎡ bolt‑ball grid‑roof construction of the banquet‑hall, covering detailed‑design of large‑span grid, factory‑prefabrication of steel‑bars and bolt‑ball components, hot‑dip‑galvanized anti‑corrosion coating, on‑site block‑assembly, segmented hoisting, support‑installation, multi‑stage unloading and roof‑purline erection. Strict quality‑control was implemented for component‑precision, bolt‑ball connection tolerance and weld non‑destructive‑testing. Real‑time deformation‑monitoring was performed during grid‑unloading process. The high‑quality grid‑roof was delivered successfully, creating a premium large‑event venue for Qihong International‑Hotel and promoting high‑end commercial‑tourism infrastructure construction in Qimen County.
