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Chapter 596 The idea of ??a dome city

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    ??

    The idea of ??a dome city is not new. As early as the last century, some architects and science fiction creators had already proposed such an idea.

    ¡°It¡¯s just that it was limited by various factors such as environment and technology at that time. Although some people tried, they ended up in vain.

    In these people¡¯s imagination, the dome city should be covered by a huge dome to isolate the influence of adverse weather such as rain and snow from the outside. At the same time, the light, temperature and other factors can be controlled and adjusted to create a perfect living environment.

    There are many plans and designs like this, but because of the huge investment required and the support of strong industrial and technical strength, so far, this idea has always remained on paper.

    Although there are some buildings that can be called domes, they do not meet Chen Xin¡¯s requirements.

    The most important point is, of course, that the scale is not large enough.

    Most of the domes currently built by humans are just single buildings. No matter how big they are, they are almost the size of a sports stadium, an airport, or a station. Compared with the city-level scale that Chen Xin expected, there is naturally a gap.  Very far.

    ¡°However, these dome buildings still gave Chen Xin a lot of reference.

    In fact, one of the important reasons restricting the emergence of dome cities is that this technology is of little use under normal circumstances.

    Although it sounds like a wonderful thing to have a huge dome covering the city and isolating the intrusion of rain, snow and other disaster weather, other impacts that come with it also need to be considered comprehensively.

    Coupled with the constraints of various factors such as construction costs, construction difficulty itself, and the larger the city, the larger the dome required, this seemingly beautiful and futuristic thing becomes less practical.

    As for another important factor, it is the dome itself.

    The dome originally used by Chen Xin¡¯s scientific research center was a steel structure and glass exterior wall. Although new materials were used, the overall weight was still not light.

    Fortunately, the scientific research center is not too big, and it can be supported by a steel structure and glass exterior walls. In addition, the exterior walls have snow removal measures, so there is no risk of overloading and overall collapse.

    But to expand the dome to the point where it can cover an entire city, the total weight of the steel structure and glass facade will reach an alarming level.

    So if you want to actually build a dome, the materials and structure of the dome itself need to be carefully considered and designed.

    The simpler method is to lower the height of the dome, widen its arc, and make it a flat arc similar to the dome of a scientific research center, rather than really making a hemispherical cover.

    This can not only save materials, but also reduce the weight of the dome. Under the current circumstances, it can support a dome covering a city.

    The curved dome itself can effectively prevent the accumulation of snow. As long as it is paired with a suitable snow removal system, the dome itself does not worry about the possibility of snowfall and collapse.

    But even so, Chen Xin does not plan to continue to use glass curtain walls as the outer walls of the dome.

    The first problem is naturally the weight of the glass itself. In addition, the dome to be built will cover a city. The consumption of glass is undoubtedly staggering. He doubts whether it is possible to get so much glass for composite construction needs now.

    And when using a glass dome, construction difficulty and construction period are issues that need to be faced seriously.

    By comparison, another material is undoubtedly much more suitable.

    This material is etfe membrane, and its more formal name is ethylene-tetrafluoroethylene copolymer membrane.

    Ethylene-tetrafluoroethylene copolymer membrane is a crystalline polymer with a melting point of 256~280c.  It can self-extinguish when burning.  It has high shearing mechanical strength and the best low-temperature impact resistance among existing fluoroplastics. It can have high impact strength from room temperature to -80c, has stable chemical properties, and has good electrical insulation and radiation resistance.

    It can be said that it is the most ideal material for making domes among all materials at this stage.

    This material has been used in the 1990s as a covering or shed membrane material.

    The Water Cube, one of the main venues for the 2008 Olympic Games, also has an exterior wall made of this material.

    If you use this material to make a dome, you can achieve the lightest quality while ensuring sufficient strength.

    As for the problem of cold protection and heat preservation, this problem can be solved by simply covering the outer layer of the etfe film with a layer of heat preservation material.

    With such a large-scale dome that can keep heat and cold out, the area covered by the dome can leave the shelter deep underground and recover.Life on the ground before the disaster.

    After all, it has been two or three years since the disaster struck. Although there are still meteorites falling from the sky, the number has been greatly reduced now, and the surface of the earth is no longer so dangerous. The safety of the dome city is still sufficiently guaranteed.

    And even if it is hit, the damage repair of etfe membrane is undoubtedly simpler than that of glass curtain wall, and it is also easier to maintain and repair.

    After solving the problem of the dome, there is no need to worry about the remaining urban construction issues themselves. The city builders of Yan State have enough experience in this area to solve all these problems.

    After such calculations, Chen Xin discovered that the conditions for building a dome city are actually present, and there is no technical hurdle to overcome.

    If a dome can be built to block the cold outside, the temperature inside the dome will not be too low even if there is no large heating facility such as an energy tower.

    As long as the internal heat is not lost, the ambient temperature in the dome can be maintained within an acceptable range, allowing people who originally need to escape the cold in underground shelters to return to the surface.

    Not to mention that as long as an energy tower is erected in the dome, the temperature in the dome can be made the same as that in the scientific research center, making it like spring all year round, and even supporting a basic need to restore the former ecological environment.

    Thinking of this, Chen Xin could no longer control his inner thoughts and quickly sorted it out, planning to report it to the country and promote the construction of the dome city.

    But before submitting the report, Chen Xin felt that he should come up with a complete set of design plans instead of submitting just such a rough plan.

    Although the construction of a dome city is theoretically feasible, what impact will such a huge dome have, how difficult is the construction, whether it can be successfully built in today's environment, and if it is to be built, where and where it should be built.  How to complete the construction is something that needs to be considered.

    So after Chen Xin hesitated for a while, he decided to improve the entire plan first, and at least complete the feasibility study before submitting it.  (Remember the website address: www.hlnovel.com
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