Skyboat Cafaidh, Àrd-ùrlar Amhairc by Xin Yuan

Skyboat Cafaidh, Àrd-ùrlar Amhairc by Xin Yuan is a highly esteemed winner of the very prestigious 2022 Duais Òir A' Design Award in Dealbhadh Ailtireachd, Togalaichean agus Structaran Competition Category.

ÒrAiltireachd· 2022

Skyboat Cafaidh, Àrd-ùrlar Amhairc

by Xin Yuan

Client: XinY structural consultants

Duais Òir A' Design Award Winner in Ailtireachd Category

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The Design

About Skyboat Cafaidh, Àrd-ùrlar Amhairc

'S e togalach dà-làr a th' ann an Skyboat a tha suidhichte os cionn tuill-shluic 613 meatair de dhoimhneachd ann an Leye, Sìona. Tha seòmraichean-taigh-òsta air an làr-ìseal, cafaidh air a' chiad làr agus àrd-ùrlar amhairc air a' mhullach. Tha làr glainne air an gabh coiseachd na phàirt den àrd-ùrlar, a tha 10 meatair air 12.5 meatairean a mheud. Tha an togalach a' dol thairis air an trannsa chumhang aig mullach an tuill-shluic agus a' sìneadh a-mach gun taic 34 meatair agus 22 meatair gu gach taobh de dhruim na beinne. Le meadhan-cuideim ìosal, tha an structar ga chothromachadh fhèin. Chan eil ach còig taicean air an cleachdadh, rud a chuingealaicheas milleadh air lusan na sgìre.

The Recognition

About the Duais Òir A' Design Award

Tha Skyboat Cafaidh, Àrd-ùrlar Amhairc air Duais Òir A' Design Award a bhuannachadh, aithneachadh anabarrach urramach a bheirear do dhealbhaidhean den chiad ìre, mìorbhaileach agus sònraichte. Tha buannaichean Òir nan cruthachaidhean anabarrach ùr-ghnàthach, làn lèirsinn agus drùidhteach a nochdas gèinidh, gliocas agus comas an luchd-dealbhaidh. Thathar an dùil gum bi Skyboat Cafaidh, Àrd-ùrlar Amhairc na innleachd a gheibh moladh mòr, a stèidhicheas gluasadan agus mòr-chuimhneachain a bheir luach nach fhacas riamh roimhe. Tha an dealbhadh seo a bhuannaich Duais Òir A' Design Award na phròiseact sònraichte, urramach a bhrosnaicheas crìochan ealain, saidheans, dealbhaidh agus teicneolais gu mòr. Bidh Skyboat Cafaidh, Àrd-ùrlar Amhairc a' cruthachadh faireachdainnean làidir miann, a' dùsgadh dealas, a' brosnachadh cruthachalachd agus a' glacadh sinn.

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