The first 3D printing villa will appear in Tongzhou residence or realize "private customization"
Recently, a villa covering an area of more than 400 square meters in Fuhao Industrial Zone, Songzhuang Town, Tongzhou District has attracted the attention of many media at home and abroad. Unlike ordinary villas, this villa is printed by 3D printing technology as a whole, with a construction period of only 45 days. This is also the first villa in the world with 3D overall printing .
The whole printing on site can resist M 8 earthquake
When it comes to 3D printing, it's no stranger. From aerospace, auto parts, medical treatment, daily necessities, food, clothing, 3D printing technology has been widely used in various fields. The reason why this villa in Tongzhou District is different is in the word "overall". In the past, 3D printing buildings at home and abroad were printed out part of the structure of the house in advance and then assembled, but this villa in Tongzhou was printed by the printer on the construction site as a whole, and the walls on all sides were printed directly by 3D printer without assembly.
This 400 square meter villa is located next to the factory building of Beijing Chinese businessman Tengda Industry and Trade Co., Ltd., which is different from the four square appearance of traditional buildings. This villa looks more like a Western Castle. The front part of the glass door is square, and the two sides are connected with a cylinder like building, making the walls on both sides of the building form a round arc. The three conical roofs are decorated in dark green, with dark gray exterior walls, apricot yellow wood and brown doors and windows. Different from the walls of traditional buildings, the walls of this 3D printing villa present a ring cake like screw structure. Wu Jianping, the person in charge of the construction party, told the author that whether it's a small 3D printer or such a "super printer", when printing, it's layered printing, stacking materials layer by layer, so the surface will look like a circle of threads, which is the result of stacking printing.
According to Wu Jianping, the villa covers an area of more than 200 square meters, with a length and width of about 15 meters. It has two floors, six rooms on each floor, and a usable area of 200 square meters. The upper and lower floors have the same structure. The whole building has a usable area of about 400 square meters. It is understood that the materials used in the construction of this villa are steel and concrete, and the design and construction are strictly in accordance with the provisions of the construction industry's traffic restriction laws, with the seismic level of more than Grade 8. Wu Jianping said that according to the raw material data stipulated by the law, it is generally enough to use 5 tons of steel bars to build a two-story building with the same area that can withstand a magnitude 8 earthquake, but the villa uses 20 tons of steel bars, and uses C30 grade concrete for general bridge buildings, with a wall thickness of 24 cm, which is very solid and can resist a magnitude 8 earthquake.
Wu Jianping told the author that the villa is a test product of the company's 3D printing equipment and will not be sold to the outside world. The first floor will be used as a "model room" for display, and the second floor will be used as an office room for employees.
80% labor cost can be saved after 45 days construction
Such a 400 square meter house for people to live in only 45 days to print, in such a short period of time to print out such a "big guy" printer what exactly ?
The printer consists of two tracks, two brackets and a large movable nozzle. To print a building, a total of 4 steps are required. The first step is electronic batching. The second step is to mix the raw materials and mix the water content of concrete. The third step is to transport the mixed materials to the printer. The last step is to print. Fix the prefabricated reinforced structure, place the two tracks of the printer on both sides of the reinforced structure, frame the general scope of the whole building, input the data of the architectural drawings designed in the early stage into the CNC system of the printer, and the system will control the printing nozzle to pour concrete on the reinforcement according to the direction of the wall body.
It is understood that the height of each layer of this printer is 10cm. Each layer of printer is not only for printing the walls around the villa, but also for the walls separating each room. At the position where the windows need to be reserved, the system will automatically stop spraying concrete, and continue to pour automatically when the windows are bypassed. For a 15 meter square house like this villa, it takes about half an hour for each floor. Wu Jianping told the author that the biggest problem in printing such a villa is how to overcome the problem that the concrete can not set quickly. After mixing, the concrete is wet because of water content. If it can't be solidified quickly, the wall can't be formed. After the continuous research of Wu Jianping's team, this 3D printer can make the concrete sprayed out solidify and form in 3 to 5 minutes when printing the wall, "it doesn't matter if people step on it!"
Wu Jianping said that it would take about three months to six months to build a two-story building with equal area with traditional building methods, and the labor cost would account for about half of the total construction cost. However, 3D printing technology can directly pour and form, cancel the formwork process, greatly reduce the project cost, and mechanical construction can reduce 80% to 90% of the labor cost, accelerate the construction speed and shorten the construction period.
"Private customization" of houses may be realized in the future
The author has learned that this villa is not the first time for Wu Jianping's team to print the building as a whole on site. As early as 2014, Wu Jianping's team tried to use 3D printing technology to print a 7.5m long, 5m wide and 2.2m high small building as a whole on site. Only the raw material used in that building is sand slurry mixed with cement, which has low seismic resistance and is not solid Solid. However, with the successful experience of the first overall printing, Wu Jianping led the team to make further efforts and finally completed the printing of reinforced concrete buildings with higher security level.
As a "veteran" who has 40 years of experience in the construction machinery manufacturing industry, Wu Jianping has always paid close attention to 3D printing technology. In 2014, Wu Jianping happened to see some news about 3D printing buildings on the Internet. He was determined to combine his professional knowledge to develop the technology to realize 3D overall printing buildings. In his opinion, 3D printing can greatly improve productivity and save production costs. In the future, he hopes to promote this technology into the society and improve the overall level of the construction field. "The more complex the building structure is, the more obvious the advantage of 3D printing technology is. Any shape of building can be printed out by computer operation as long as there are drawings, and you can print out the appearance you want at will. In the future, you can also make a" private customized "house!