The prospect of underground space

Utilization prospect of urban underground space-the future of the city

The development and utilization of underground space is the product of the development of the city at a certain stage, and its purpose, function, scale and scope should be adapted to the level of urban development, and it is unfavorable to lag behind or advance.

Qian Qihu, an academician of China Academy of Engineering, said: "Underground space can effectively solve the phenomenon of increasingly crowded urban traffic and avoid the appearance of' zipper roads'. Unfortunately, underground space in many areas of China has not been utilized." At the Civil Engineering Branch of the 6th Nanjing Youth Academic Forum held recently, Qian Qihu, an academician of China Academy of Engineering, pointed out that making full use of underground space has gradually become a new trend of international energy conservation.

in 25, China's per capita GDP exceeded $1,7, and it is predicted that China's per capita GDP will exceed $3, by 22. According to the forecast of urbanization development trend in China, the urbanization level of China will reach about 45% by 21, and the corresponding urban population will reach 63 million. The accelerated development of urbanization makes it inevitable that the development and utilization of urban underground space will be accelerated simultaneously. It can be predicted that the next 2 years or more will be the peak period of large-scale construction of urban underground space in China. For example, in the next decade, nearly 3 cities in China will enter the period of rapid development of urban subway and light rail construction, and it is estimated that the urban subway will increase by 5-6 kilometers or more in the next five years. Among them, Shanghai and Beijing will develop subways at a speed of 4 kilometers or more each year. Only by taking the road of efficient utilization of urban land resources and comprehensive development of underground space can China achieve sustainable development. In the first decade of the 21st century, the general goal of the development and utilization of urban underground space in China is to speed up the overall planning of the development and utilization of urban underground space on the basis of the achievements made at present. Formulate policies and regulations; Straighten out the management system; Promote the technical innovation and progress of underground space construction, make the overall level of urban underground space development and utilization close to the level of developed countries in the mid-199s, initially form a public space system of underground people flow and logistics combined with ground buildings, and build a comprehensive urban disaster prevention system.

Urban underground space is a huge and rich space resource, and the exploitable amount of urban underground space is the product of exploitable area, reasonable development depth and appropriate utilization coefficient. It shows that the total area of urban construction land in China was 322,8 hectares in 212. According to the exploitable coefficient of 4% and the development depth of 3 meters, the amount of underground space resources available for rational development reached 387.36 billion cubic meters. This is a considerable and rich resource. If it is developed reasonably, it will be of great significance to expand urban space and realize urban intensive development.

With the development and utilization of underground space in first-tier cities in China, the shallow underground part will be fully utilized, and the deep excavation technology and equipment will be gradually improved. In order to comprehensively utilize underground space resources, underground space development will gradually develop to the deep level. Although the development cost of deep underground space is high, even the Shenkeng Hotel of Shimao Group, which is rich in money, has made full use of the underground space of abandoned quarries and become the lowest-altitude hotel, but the development and utilization of deep underground space resources has become the main topic of urban modernization in the future. With the deepening of underground space, the differentiation trend of each spatial level is getting stronger and stronger. This layered underground space is centered on people and the functional areas that serve it. People and vehicles are separated, municipal pipelines, sewage and garbage are treated at different levels, and all kinds of underground traffic are also layered to reduce mutual interference and ensure the sufficiency and integrity of underground space utilization.

with the rapid development of urbanization, the lack of land resources, the persistent high PM2.5 index and high-concentration smog weather, enjoying the sunshine, breathing the air, drinking pollution-free water and not being crowded with traffic have become "luxury goods". There are more than 28 cities at or above the prefecture level that have put forward ecological development models such as "eco-city" and "low-carbon city" as urban development goals in China, but few successful cases have been recognized so far. This is the expected future of the Expo block. The post-Expo area has established a set of new systems, new models and new mechanisms based on its own characteristics, so as to create a low-carbon ecological smart city according to local conditions.

as one of the 12th five-year development plans of Shanghai, the subsequent development and construction of the park bears a heavy mission, and also welcomes unprecedented development opportunities. Therefore, how to better inherit and carry forward the essence and best practices of low-carbon Expo, better meet the public's expectations and requirements for underground life, and better complete the construction of soft and hard environment of "low-carbon society" has become an important topic for better development and research.

"The First International Symposium on Underground Space and Modern City Center in 213" deeply discussed how to effectively use underground space resources to help urban development. On this basis, in order to continue the brand effect of Expo Low-carbon Ecological Science and Technology Forum, continue to pay attention to the development wave of underground space and modern city center, and expand the scale of "Seminar on Underground Space and Modern City Center", it is planned to continue to combine the underground space development and construction projects of Expo to gather outstanding underground space and urban planning cases and professionals from all over the world. The "214 (Second) International Symposium on Underground Space and Urban Complex" will be held again in Shanghai on September 18-19, 214, which will cross the contents of underground space development, energy management, green building and other disciplines, discuss and display industry trends and latest market trends through high-end forums, professional seminars, exhibition areas and other forms, and realize the combination of production, learning, research and use, so as to promote development.