地下工程（underground engineering）.docVIP

地下工程（underground engineering） I. overview of underground engineering 1, underground space development and utilization can be divided into which periods? Primitive times: ancient times, medieval times, modern times and modern times 2. The first subway in the world? The longest subway line? The most luxurious subway? The first subway the longest subway line in London -- the most luxurious subway in New York, Russia 3, the utilization principle of underground space in our country? Peacetime, for the benefit of the people. 4, the contents of underground engineering research The main contents include planning, design, construction and operation maintenance of underground buildings. 5. Characteristics of underground space engineering structures Structural features: space, tightness, isolation, pressure resistance, cold resistance and seismic resistance Physical characteristics: heat insulation, constant temperature, humidity, light shielding, hard permeability and sound insulation Chemical properties: reactivity 6, the advantages and disadvantages of underground space engineering? Advantages: the visual control limiting the open floor space and effective utilization of land circulation and the underground environment and the interests of the transport energy saving and climate relatively stable temperature and humidity and natural disaster protection and security to noise and vibration isolation and the maintenance management. Disadvantages: (1) the limited opportunities for overlooking and natural lighting; the inconvenience of entering and traveling; the restriction of environment and energy utilization. 8. What is the reprocessing of radioactive waste? Chemical methods are used to refine radioactive materials from radioactive wastes and to be used again as nuclear fuel. 9. What are the functions and types of underground streets? Roles: improving urban traffic, reducing cross flow of personnel on the ground, and realizing the diversion of people and vehicles. Combining