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| The subversive idea and its key technical prospect on underground ecological city and ecosystem |
| XIE Heping1，GAO Mingzhong2，ZHANG Ru2，XU Heng3，4，WANG Yongwei5，DENG Jianhui2 |
| (1. State Key Laboratory of Hydraulics and Mountain River Engineering，Sichuan University，Chengdu，Sichuan 610005，China；2. School of Water Resources and Hydropower，Sichuan University，Chengdu，Sichuan 610065，China；3. College of Life Science，Sichuan University，Chengdu，Sichuan 610065，China；4. Key Laboratory of Bio-resource and Eco-environment，Sichuan University，Chengdu，Sichuan 610065，China；5. Shandong Academy of Building Research，Jinan，Shandong 250031，China) |
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Abstract Modern cities have been expanded rapidly and crowded with skyscrapers，which inevitably yields severe environmental pollution，resource shortage，traffic conjunction and exorbitant housing prices. These urban problems have significantly restricted the healthy development of urbanization. The 21st century is marked by the anthropogenic utilization of underground space，but the sustainable development is confined by the current passive and extensive underground exploitations in a single-function and disorderly manner. The mode of exploitation and utilization in the foreseeable future should be changed from the passive to an active manner with the features to be ecologically，integrated，deeper and informational. In this study，some key principles for underground space exploitation were proposed. The different stages for deep earth science from era 1.0–5.0，the corresponding top plan conception and strategic blueprint were presented. Taking the unique advantages of the deep space，such as the clean environment，sound and quake insolation，natural disaster prevention，low background radiation and constant temperature and humidity，the idea and associated subversive technology have also been proposed with the aim to utilize the underground space for self-balancing and multi-layered ecological city through the deep underground energy resource generation and recycling system，harmless treatment and storage system of wastes in deep underground circumstances. The deep underground city with the full-chain deep underground ecosystem will be constructed with the capacity for settlement，health-care，manufacturing and scientific research. These functions will realize the prospect of utilizing the space and resources from the underground. The idea of underground cities and ecosystems will fundamentally relieve the conflict between the rapid population growth and relative shortage of surface land resources，which will be an important step to realize the sustainable development of human society in the future.
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| [7] |
朱作荣，束 显. 关于城市地下空间利用的东京宣言[J]. 地下空间，1992，12(1)：64-65.(ZHU Zuorong，SHU Xian. Tokyo Declaration on the utilization of urban underground space[J]. Underground Space，1992，12(1)：64-65.(in Chinese))
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2017, Vol. 36 
