Beijing how to build large scale demolition of the ventilation corridor does not appear

Recently, the national development and Reform Commission and was jointly issued by the Department of housing of the urban action plan for adaptation to climate change, specifically requested to "free up the urban ventilation corridor, increase the mobility of air". Beijing City Planning Commission also set up a team of the Center City corridor ventilation system, whose mandate is in building in the center of the capital into a perfect ventilation corridors of network systems, between downtown and suburban districts and counties to better "breathing".

"5 ventilation corridor width of 500 meters above sea level", "multiple width of 80 meters above the secondary ventilation corridors", "forming a corridor ventilation network system" ... ... Is the contents of the plan. Among them, 5-level air corridor in downtown of Beijing parks and plenty of green spaces in series. Kun Tamagawa is planning to air corridor in the Northwest section.

For the planning and construction of the Beijing air corridor, project researchers at Tamagawa in Kunming area 3 locations were selected to simulate the measured. Results show that the air corridor to reduce the heat island effect and promote air flow will produce results, especially in the peak effects are more obvious.

Kun Tamagawa Miyun reservoir is connected downstream of the diversion Canal waterways in urban area in Beijing from Kunming Lake in the summer palace into bayi yuyuantan Lake, the starting and ending at each end has rich historical and cultural landscape. "River view, wide vision, the air is also quite good. "Mr MA who lives in Haidian District in Kunming Tamagawa for a walk along the coast.

"The actual test, computer simulation results showed that ventilation corridors can play a role. "The Deputy Director of the Research Office of the Beijing Institute of city planning and design planning, Mr Frederick Ho, said.

In fact, during the planning and construction of the Beijing more ventilation corridors, there are some "blocked". "Within the ventilation corridor planning in the future, building height, density and so on will be strictly controlled. "Mr Ho explained, need for building ventilation corridors of open space, and height is higher, denser buildings fall, it will become a bottleneck in the flow of the air district. For example, the confluence is located in the Eastern Corridor of the Shi Li River area, with large wholesale markets and temporary buildings, which may have an impact on ventilation corridors.

In this regard, the Deputy Director of the Beijing Municipal Planning Commission, Wang Fei said: "at present, ventilation corridors in Beijing is still in the planning stage, entered the implementation stage is mainly based on the current situation to tighten control of the future increases. "In other words, large scale demolition of existing buildings are not likely.

In fact, urban ventilation corridors already have, many cities are planning and practices in the use of the design. For example, when the 70 's of last century, Germany synoptic climatology and the introduction of town planning practice. Germany Munich every summer are hot dry foehn, which take advantage of this feature, building 5 urban corridor ventilation, cool air into the area around the urban area, foehn from the city through, and take out the dirty air in the city, effectively solve the problem of urban air.

The traditional urban planning has similar ideals, mainly refers to the process of urban planning, construction, leave some space corridor, which is conducive to the spread of pollutants, urban heat, drafts principles like the House.

At present, the research team through the Center City corridor ventilation system data, paths, seeking excellence in scientific method to plan three air corridors. According to Wang Fei introduction, high potential for the future Beijing will also use ventilation zones in order to improve the overall ventilation built-up area. 20/20, Beijing will be able to complete the building in downtown City Greenway system, the skeleton forms the Center urban greenways network.

(Editors: Zhong Qinghui UN660)
2016-06-07 17:15:16
Surging

北京通风廊道怎样建 大规模拆迁不会出现

　　近期，国家发改委和住建部联合印发了《城市适应气候变化行动方案》，明确要求，“打通城市通风廊道，增加城市的空气流动性”。北京市规划委也成立了中心城通风廊道系统团队，其任务是在首都中心城区建设成一套完善的通风廊道网络系统，让中心城区与远郊区县之间更好地“换气”。

　　“5条宽度500米以上的一级通风廊道”、“多条宽度80米以上的二级通风廊道”、“形成通风廊道网络系统”……都是规划中的内容。其中，5条一级通风廊道将北京市中心城区多座公园和大片绿地串联起来。昆玉河即被规划为西北部通风廊道中的一段。

　　为规划建设北京的通风廊道，项目组研究人员在昆玉河地区选了3个地点进行模拟实测。结果显示，通风廊道对降低局地热岛效应、促进空气流通有一定效果，尤其是在峰值时效果更加明显。

　　昆玉河连接了密云水库与北京城区引水渠的下游水道，从颐和园昆明湖通到玉渊潭八一湖，始末两端都有丰富的历史人文景观。“河边风景好，视野开阔，空气也挺好。” 家住海淀的马先生常常在昆玉河沿岸散步。

　　“实际检测、计算机模拟计算的结果都表明，通风廊道可以发挥一定的作用。”北京市城市规划设计研究院规划研究室副主任何永说。

　　事实上，在北京市规划建设的多条通风廊道中，存在一些“堵点”。“在未来通风廊道规划范围内，建筑物的高度、密度等都将严格控制。”何永解释，通风廊道的建设需要有开阔的空间，而不少高度较高、密度较大的建筑群落，会成为空气流动的瓶颈区。例如，位于东部两条廊道汇合处的十里河地区，拥有大量的批发市场以及临时建筑，即可能对通风廊道造成影响。

　　对此，北京市规划委副主任王飞表示：“目前，北京的通风廊道还处于规划阶段，未来进入实施阶段后主要是基于现状严控增量。”也就是说，大规模拆迁现有建筑的可能性并不大。

　　实际上，城市通风廊道的概念早已有之，不少城市都在规划和实践中运用过该设计。例如，上世纪70年代时，德国就把气候学和天气学引入城市规划的实践。德国慕尼黑每年夏天都有干热的焚风，该城市利用这一特点，建设了5条城市通风走廊，把周边区域冷空气引入市区，让焚风从城市中穿过，并把城市中既有的脏空气带出去，有效解决了城市空气问题。

　　我国传统的城市规划也有相近的理念，主要是指在城市规划、建设过程中，留出一定空间的走廊，从而有利于污染物、城市内部热量的扩散，原理就像屋内的穿堂风。

　　目前，中心城通风廊道系统研究团队是通过数据计算、路径寻优等科学方法来规划三级通风廊道。据王飞介绍，未来北京还将利用通风潜力较大地带，以提升建成区整体空气流通性。至20 20年，北京将可以全面建成中心城区市级绿道系统，形成中心城区绿道网的骨架。

(责任编辑：钟庆辉 UN660)
2016-06-07 17:15:16
澎湃