Skyboat Kavarna, razgledna ploščad by Xin Yuan

Skyboat Kavarna, razgledna ploščad by Xin Yuan is a highly esteemed winner of the very prestigious 2022 Zlata nagrada A' Design Award in Arhitektura, gradnja in oblikovanje konstrukcij Competition Category.

ZlataArhitektura· 2022

Skyboat Kavarna, razgledna ploščad

by Xin Yuan

Client: XinY structural consultants

Zlata nagrada A' Design Award Winner in Arhitektura Category

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Verified Award Winner

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The Design

About Skyboat Kavarna, razgledna ploščad

Skyboat je dvonadstropna stavba, postavljena nad 613 metrov globoko kraško vrtačo v kraju Leye na Kitajskem. V pritličju so hotelske sobe, v prvem nadstropju kavarna, na strehi pa razgledna ploščad. Ploščad vključuje pohodna steklena tla v izmeri 10 krat 12,5 metra. Stavba premošča ozek prehod na vrhu vrtače in previseva 34 metrov oziroma 22 metrov na vsako stran gorskega grebena. Nizko težišče omogoča, da se konstrukcija sama uravnoteži. Uporabljenih je le pet podpor, kar omejuje škodo na lokalnem rastlinju.

The Recognition

About the Zlata nagrada A' Design Award

Skyboat Kavarna, razgledna ploščad je prejemnik Zlate nagrade A' Design Award, neizmerno prestižnega priznanja, ki se podeljuje prvovrstnim, čudovitim in izvrstnim oblikovanjem. Prejemniki Zlate nagrade so izjemno inovativne, vizionarske in bleščeče osupljive stvaritve, ki odražajo genij, modrost in mojstrstvo svojih oblikovalcev. Od Skyboat Kavarna, razgledna ploščad se pričakuje, da bo zelo hvaljen, trende postavljajoč in monumentalen izum, ki prinaša brezprecedenčno vrednost. To oblikovanje, nagrajeno z Zlato nagrado A' Design Award, je spektakularno, spoštovano delo, ki v veliki meri koristi in premika meje umetnosti, znanosti, oblikovanja in tehnologije. Skyboat Kavarna, razgledna ploščad ustvarja intenzivna čustva želje, prebuja strast, spodbuja ustvarjalnost in nas prevzame.

Behind the Design

Press Kit

Credits, team members and technical details provided by the designer.

Unique Properties: The structure cantilevers 36m over the 613m deep sinkhole. The top of the sinkhole is extremely narrow which can only accommodate a small passageway. Skyboat is proposed to span over the passageway and cantilever out to each side of the mountain ridge. Similar to the tumbler toys, it is proposed to lower the structure centre of gravity and utilize the minimum area (10metres by 30metres), in which way, the self-balance of the structure is therefore achieved.
Dimensions & Packaging: two-storey building consisting of hotel rooms at the ground floor, a café at the first floor and a roof viewing platform which contains a 10metre-by-12.5metre walk-on glass floor. The building comprises a construction area of 495m2 and covers a plan dimension of 10metres by 80metres. Both ends of the building cantilevers out by 34metres and 22metres respectively. The total steel weight used is 438 tonne.
Tags: Skyboat, XinY, Glass floor, Cantilever, Leye, Dashiwei
Production Technology: There are only five supports proposed. This minimizes the damages to the local vegetation.

To protect the local plants and rivers, hanging falsework was used during the construction stage and to have the structural members installed by pieces.
Design Challenge: The structure cantilevers 36m over the 613m deep sinkhole. The top of the sinkhole（the site）is extremely narrow which can only accommodate a small passageway.
A long crack at the site indicates the site is not stable. Apart from grouting the existing crack, it is also proposed to have the key struts at each ends of the building inclining towards the ridge, the horizontal component forces from which then provided the embracing forces to the ridge and hence improved the stability of the site.
Research: The structural system and component arrangements were adapted to the force distribution, perfectly aligned with the elegant architectural geometry.
By increasing the key strut lengths, the pre-cambering of the front cantilever structure is then achieved, which can compensate the deflections under the dead loads and some of the live loads. This also protects the glazings from large deformations.
Inspiration: A big goose, a e tumbler toy.

The long crack at the top of the ridge indicates the site is not stable. Apart from grouting the existing crack, it is also proposed to have the key struts at each ends of the building inclining towards the ridge, the horizontal component forces from which then provided the embracing forces to the ridge and hence improved the stability of the site.
Project Duration: The project started on 2018 in Leye China and finished on 2019.
Operation Flow: Visitors can enjoy coffee in the beauty of nature, or they can walk on the glass floor above the 600-meter deep pit to experience the shock of their heartbeats.
Team Members: Structural Engineers:XinY & Yuanlizhu
Client:Guangxi Leye DashiWei
Architect:Zhong Huaying Studio
Codesign:LiLi & Shanghai ZhongJian Architectural Design
Principal Contractor:China Railway 25th Group 6th Company
Image Credits: Image#1: Photographer Li Jin, Yongheng,2019.
Image#2: Photographer Yongheng, Yongheng,2019.
Image#3: Photographer Yongheng, Yongheng,2019.
Image#4: Photographer Xin Yuan, XinY,2019.
Image#5: Photographer Yongheng, Yongheng,2019.
Video Credits: Yongheng