It comes from Lao Zi’s Tao Te Ching that “major principles are simple”. “Less is more” in the architectural philosophy of western modernism and the minimalism pursued by contemporary Japanese architects have actually been embodied as early as thousands of years ago in China. In the ancient Chinese idea, architecture can even get rid of any medium and reach the extreme lightness without its existence.
▼项目概览，project overview ©金啸文
Jiunvfeng Study is located in Daiyue District, Tai’an City, adjacent to the Shenlong Grand Canyon, with Mount Tai, the top of the five sacred mountains, in the east. It is surrounded by mountains, full of rocks like flocks of sheep, with the broad vision of overlooking the gorge and gully and looking out mountains and peaks. On the rocky mountain in the north, the contrasting white is left vacantly, which was the original idea of the design.
▼九女峰景观，Jiunvfeng landscape ©潘炳
Site and Form
Comparing with the magnificence and sublimity of Mount Tai, Jiunvfeng is simple and restrained. line+ hopes to build “a floating cloud wadding hovering in the mountains” to respond to the magnificent cloud sea of Mount Tai.
▼鸟瞰图，aerial view ©章鱼见筑
The study is located at the high point of the mountain ridge, with mountains in the east, the village in the west, it can be seen when driving to circle up the mountain.
▼远眺山顶，a distant view to the mountain top ©金啸文
The building form can be divided into three parts from top to down: the white “cloud body”, transparent glass and thick rubble wall base. The north side faces the wide interface of canyon and peak. The narrow corridor at the entrance connects the coffee bar and the reading area at the two sides. It blurs the boundary between the architecture and the natural landscape, giving visitors and readers the illusion of being in the top of forests and mountains.
▼建筑外观，exterior view ©章鱼见筑
▼狭长的过道连通两端的咖啡区和阅读休息区，he narrow corridor at the entrance connects the coffee bar and the reading area at the two sides ©章鱼见筑
Material and Structure
▼结构生成图，Structure formation ©gad · line+ studio
▼轴测分解图，Axonometric exploded diagram ©gad · line+ studio
The accurate use of materials and structures is equally important for the form expression of the design idea. For the shaping of the concept of cloud flocculation, we hope to highlight the following key words: floating, light and transparent. In the natural conflict between the soft intuitive cognition of “cloud” and the simple and hard mountain environment in northern China, it gives people a relaxed and pleasant intuitive perception.
▼漂浮、轻盈、通透的体量，a floating, light and transparent volume ©章鱼见筑
The light steel and membrane structure system used in the main building has the characteristics of firmness, reliability and lightness, which enables the design to draw the thin and stretching shape with the natural curve on the top of the hill.
▼以自然曲线勾勒出轻薄舒展的造型， to draw the thin and stretching shape with the natural curve ©章鱼见筑
The transverse base structure shrinks to a maximum extent, with balconies extending on each side, creating a sense of suspension ©金啸文
The double-layer white membrane inside and outside the roof is drawn by a series of arched light steel keels with gradual changes in size, which ensures the fluent, soft and smooth shape of the roof.
▼屋面外部视角，roof top view ©章鱼见筑
▼屋面内部视角，view from the interior ©章鱼见筑
Near the south side of the village, the wall is made of local rubble, which is thick and solid, melting into the mountain stepping up, and following the primitive temperament of residential buildings. The curved wall interface guides to the entrance, which indicates the orientation relation between the whole building and the site.
▼近村落的一侧采用毛石墙面，the rubble wall facing the village ©章鱼见筑
The high glass windows in rows between the rubble wall and the roof naturally transit the “heaviness” and “lightness” in the vertical direction which not only meets the needs of indoor natural ventilation and lighting, but also creates an ambiguous relationship between the rubble wall and the white membrane roof which wants to break free but is still related with each other.
▼石墙与白膜屋面的暧昧关系，an ambiguous relationship between the rubble wall and the white membrane roof ©章鱼见筑
▼剖面透视图，Section Perspective ©gad · line+ studio
The northern facade facing the canyon and the mountain unreservedly adopts a large area of rimless glass windows, and the transparent large glass accommodates the external flowing scenery, while the solid structure below the roof is hidden. The “cloud” looks like floating on the rocks from a distance.
▼浮在山石之上的“云”，the’ “cloud” floating on the rocks ©章鱼见筑
▼通透的大面玻璃，the rimless glass windows ©章鱼见筑
▼连续的窗景，a continuous scenery ©章鱼见筑
The bookshelves and seats in the interior are also laminated in an integrated arc shape ©金啸文
The curve corridor, which turns from wide to narrow, then to wide, naturally transits the dynamic and static public areas, and constructs the space boundary in a gentle way ©金啸文
▼室内细部，interior detailed view ©金啸文
The inner membrane at the top of the room is covered with light strip. At night, the whole curved inner membrane radiates evenly, and the light escapes from the high windows between the stone walls and the membrane surfaces. It looks like a cloud with halo from the distance.
▼弧形内膜整片均匀泛光， the whole curved inner membrane radiates evenly ©金啸文
▼光线从石墙与膜面间的高窗中逸出， the light escapes from the high windows between the stone walls and the membrane surfaces ©章鱼见筑
In order to maintain the integrity and purity of the membrane surface on the top of the room, we chose the ground air system. The main air duct under the floor is hidden in the side close to the rubble wall, and the branch pipe is upturned inside the ring beam, connecting the ribbon outlet through the cavity between the floor and the surface. While satisfying the requirement of air volume, the overall height of the outer edge of aluminum plate is reduced to the maximum extent, so as to ensure the light floating effect of the building.
▼建筑采用了地出风系统，a ground air system is integrated to the structure ©章鱼见筑
▼地出风系统保证了室内顶部膜面的完整与纯粹，the ground air system maintains the integrity and purity of the membrane surface on the top of the room ©章鱼见筑
Construction and Implementation
The project began to be constructed in April 2019 and was completed in September 2019. The precise and rapid assembly of the light steel construction system ensured the construction period. At the same time, the design work ran through the whole construction process: the uncertainty of the site forced the architect to re-perceive the site, so that the design can be updated and adjusted accordingly.
1. 基础施工 | Foundation construction
To make the whole building “suspend” on the ground, the design foundation is slightly above the surrounding ground. After surveying the terrain, illumination and landscape resources, it is found that the canopy height and density condition of the existing vegetation directly affect the base location of the building and the view height of the landscape, so the base height was re-adjusted to 400mm.
▼基础施工，Foundation construction ©gad · line+ studio
2. 主体结构施工 | Main structure construction
The precast element in the factory ensured the accuracy of construction. A thin steel column with a diameter of 150mm supports the arc-shaped ring beam, and a double-deck 28 pairs of arched keels were set up on the ring beam. This series of arc-shaped keels with gradual changes in size and dense arrangement provides support for the smooth tension of the inside and outside double layer membrane.
▼龙骨结构，Keel structure ©gad · line+ studio
▼立钢柱，Vertical steel column ©gad · line+ studio
▼圈梁施工，Ring beam construction ©gad · line+ studio
▼底盘主梁次梁施工，Construction of main-beam and sub-beam in chassis ©gad · line+ studio
3. 内外膜结构安装 | Structure installation of inner and outer membrane
Wire meshes were pulled and connected between 28 pairs of arched keels, and the tin foils were spread flat to reflect the light of LED light strip evenly, the bagged insulation cottons were covered and fixed on the tin foils. The inner lining fixed on the inner side of the lower keel is the light box cloth, which was finished by fine hanging and auxiliary tension with metal buckles.
▼膜结构节点，Membrane structure nodes ©gad · line+ studio
▼屋顶主龙骨施工，Construction of main-beam on the roof ©gad · line+ studio
▼屋顶次龙骨施工，Construction of sub-beam on the roof ©gad · line+ studio
▼屋顶保温-外膜安装，Roof thermal insulation-outer membrane installation ©gad · line+ studio
▼内膜安装，Inner membrane installation ©gad · line+ studio
4. 毛石墙砌筑 | Rubble-wall masonry
The south side entrance and the elevation were built with the rubble wall, supplemented with the small steel column slipknots. The architect selected suitable size and color of rubble on site and guided the construction team to complete the masonry.
▼毛石墙砌筑，Rubble-wall masonry ©gad · line+ studio
5. 灯光与室内施工 | Lighting and indoor construction
The LED light strip is arranged lengthwise above the lower keels. To realize the large-area uniform floodlight effect of the indoor membrane bottom, the tests of different arrangement, illuminance and interval of LED light strip were carried out on site.
▼LED灯管测试与安装，LED tube test and installation ©gad · line+ studio
▼门窗安装， Installation of doors and windows ©gad · line+ studio
▼室内施工，Interior construction ©gad · line+ studio
When morning light slightly illuminates, the transparent glass body is hidden in the forest; when night falls, the “cloud” floats on the mountain with a faint light; visitors inside are totally immersed in a relaxed space atmosphere to read and meditate. The architectural space created by the environment exists in the natural landscape of dynamic evolution, and we ascribe it to nature in the simplest and the most direct way, so as to live with nature in harmony.
▼“云朵”泛着微光浮于山间，the “cloud” floats on the mountain with a faint light ©金啸文
▼模型照片，Model ©gad · line+ studio
▼总平面图，Site Plan ©gad · line+ studio
▼平面图，Plan ©gad · line+ studio
设计公司：gad · line+ studio（建筑、室内、景观）
Project Name: Jiunvfeng Study on Mount Tai
Project Location: Dongximen Village, Daiyue District, Tai’an, Shandong
Design Company: gad · line + studio (architecture, interior, landscape)
Chief Architect/Project Principal: Menɡ Fanhao
Architecture: Zhu Min, Zhang Erjia, Xu Hao
Interior: Jin Xin, Hu Jinwei, Zhou Xinyi
Landscape: Li Shangyang, Jin Jianbo, Chi Xiaomei
Floor Area: 287.3 m2
Design Period: 2019.04-2019.06
Construction Period: 2019.05-2019.09
Client: Lushang Pusu (Tai’an) Cultural Tourism Development Co., Ltd.
Structure Coordination and Construction: Hangzhou Zhongpu Building Technology Co., Ltd.
Structure: Membrane structure roof and steel structure
Materials: Membrane, steel, rubble
Photography: zystudio, Jin Xiaowen, Pan Bing