无雪之冬的“冰棱”奇观·北京郊区峡谷中的天气项目丨中国北京

非常感谢

氙建筑

Appreciation towards

xian architects

for providing the following description:

这是一个关于天气的项目。

北京，2013至2014的跨年之冬还没有任何要下雪的迹象，以往对冬的记忆因为没有雪的存在而变得模糊。氙建筑想在无雪的冬季里，通过这个项目提供给人们一种既熟知又陌生的体验，重拾感知天气的乐趣。

This is a project regarding the weather.

It is this time of the year, the long waited first snow of 2013-14 winter, but there’s still no sign of snowing over here in Beijing. The memory of the past snowy winters has begun to fade. Through this project, xian architects want to provide the people in the snow-less winter with a well know yet unfamiliar experience, to rediscover the pleasure of perception towards the winter.

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项目地点是在北京郊区的峡谷里。深冬小寒日入峡，泉水入潭成冰，冰质纯净至极，厚度可达440mm左右。我们取峡谷中最通透的冰制作了一整根三棱柱，截面为边长440mm的等边三角形，柱高2800mm。可以想象为，将物理课上用的光学棱镜放大了近20倍。至净至透之冰能达到与石英相近的光学性能，冰棱也因此发生了光的色散、全反射和折射现象。但是冰棱却是一个非常规的尺度，一个更接近建筑的尺度。

三九，冰柱被放置于峡谷里的一块巨石上，天空晴朗无云的时候，中午12：00至12:10阳光从大山之间的缝隙里以特定角度投射到冰棱上，经过冰柱后会在河谷的石砾上投射出巨大的彩虹色带，色带刚好处于大山的阴影里，因此更加绚烂夺目。

捕捉到这一切的条件是：寒冬，晴空，特定时间，大山阴影。于是冰棱使人与天气，与时间的关系变得十分的敏感。冰棱同时也发生了全反射和折射，随着人观察角度的不同以及太阳角度的变化，冰棱或消失，或耀目，或光彩，或漆黑，不停的反射和折射周遭。

如果把冰棱的尺度看做是建筑的尺度的话，那么我们认为它与周遭的关系是一种的新的关系。

This project was set at a valley in Beijing’s suburb. On “Minor Cold” (xiǎohán) day (the 23rd changes of Chinese Solar Terms), spring water flows into the pool and freezes to ice, the purity of ice is on its highest; its thickness can reach 440mm at times. We chose the most crystal clear ice and cut it into a triangular cylinder prism. The prism has a height of 2800 mm with the base of an equilateral triangle with side length of 440 mm.

As you can imagine, we built a prism that is 20 times larger than those we used in Physic lesson. Ice Prism’s purity and transparency has reached the level of quartz’s optical property, thus it makes dispersion, total internal reflection and refraction possible. However, ice prism has an unprecedented larger scale, a scale that is close to architecture.

On “Third Nine” (sānjiǔ) day (the coldest day of the year on Chinese Solar Terms), that is the third nine-days periods after winter solstice, Ice Prism was placed on a huge rock in the valley, when sky is clear with no clouds, at noon 12:00-12:10, sun ray passes through the gap between mountains to the ice prism at a specific angle, it projects a long band of rainbow in the valley, and perfectly sits on the shadow of the mountain, thus makes it even more colorful.

Elements to capture this moment: Cold winter, Clear Sky, Specific Time, Shadow from the mountains. It reflects a sensitive relationship between people, weather and time.

Because of ice prism’s total internal reflection and refraction, whenever man changes its viewing position or variation of sunbeams’ angle of incidence, ice prism may disappear, may shine, may split out colors, may become dark… and keep on reflecting, refracting the surrounding environment.

If we take ice prism’s scale as architecture’s scale, we think its relationship with the surrounding environment is a new one.

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