Chen Xun

Recently, the second phase of the expansion project of Fuzhou Changle International Airport, jointly undertaken by China Construction Fourth Bureau and other units, has made important progress, and the new T2 terminal has completed the metal roof and curtain wall closed water node, marking that the project is about to enter the terminal interior decoration construction and mechanical and electrical installation stage.

The closed water of the metal roof and curtain wall of the terminal refers to the completion of the roof rainwater isolation of the terminal building to realize the functional construction of wind and rain protection, which means that the internal decoration and mechanical and electrical installation of the terminal will no longer be affected by the rainy weather. From a bird's-eye view from the air, the overall appearance of the terminal building is fully revealed, and the metal roof, glass curtain wall, roof skylight and other "wearing clothes and hats" projects are basically completed.

Project construction site. Photo courtesy of China Construction Fourth Bureau

福州長樂國際機場二期建設25萬平方米航站樓，28座登機橋與之相連。主航站樓金屬屋面分為上中下三層，包含鋁鎂錳直立鎖邊屋面板系統、金屬裝飾板系統、採光天窗系統及屋面天溝系統等，形成了錯落有致的視覺效果。

In terms of materials, the aluminum-magnesium-manganese plate used in the metal roof has the characteristics of corrosion resistance, and the whole complete roof panel is used, and the single aluminum-magnesium-manganese plate is up to 72 meters, and there is no cutting, weld splicing, etc. in the middle, which reduces the problem of the joint gap of the block plate, increases the occlusion force between the roof panel and the main structure, and increases the wind resistance to a certain extent.

Project construction site. Photo courtesy of China Construction Fourth Bureau

整個T2航站樓一共使用了2萬塊玻璃，其中屋面天窗使用玻璃約11000塊，由2萬平方米光伏一體化超白鋼化中空夾膠玻璃組成，透光率達90%以上，最大程度引入自然光，隔離紫外線，為旅客提供最佳的光照度、舒適度。

不僅如此，屋面天窗集成光伏發電系統，通過14000平方米太陽能板與6000平單晶矽光伏同步工作，年發電量預計達2400萬度，相當於節約標準煤約9600噸，減排二氧化碳約2.4萬噸，可滿足機場10%的用電需求，飛行區車輛設備可不用“一滴油”，實現“自發自用、余電上網”的低碳目標。

據介紹，航站樓玻璃幕牆面積達10萬平方米，用到約9000塊玻璃，採用Low-E中空玻璃及智慧遮陽百葉窗，夏季遮陽率超59%，降低空調能耗6.21%。採光頂引入自然光，配合室內光感調節系統，做到“光”盡其用，當陽光強烈時，燈光會自動變暗或者隔一組開一組，在陰雨天氣時又能自動提升亮度，既減少人工決策的工作量，又能更靈敏地應對不同的光照條件，做到即時、精細調節。相比固定時間開關模式，這種方式實現節電35%，全年可節電200萬千瓦時。

Terminal glass curtain wall. Courtesy of China Construction Strait

In terms of building seismic resistance, the project designs the seismic performance of steel structure components from the aspects of seismic fortification category, fortification intensity, and site conditions. In view of the frequent coastal typhoon environment, the curtain wall adopts a single-layer two-way cable flexible structure, which is fixed with high-strength aluminum alloy cable and wind-resistant clamps. The design has been verified by the 17-round wind resistance test, which can resist a super typhoon of level 0, and at the same time, the rigid expansion joints are used to resolve the temperature deformation, ensure the air tightness and water tightness of the curtain wall, reduce the splicing gaps, and enhance the overall stability.

福州長樂國際機場二期擴建工程建成后，將助力福州長樂國際機場跨入“雙跑道、雙航站樓”時代，預計年旅客吞吐量達到3600萬人次、貨郵吞吐量達到45萬噸、飛機起降27.7萬架次，打造國際大型樞紐機場、海上絲綢之路的門戶樞紐機場，為福建省擴大高水平對外開放、推進經濟社會高質量發展注入新的強勁動力。(張婷)