by Source: concrete and cement products network, ECGB_ It takes only 19 days for China to build a wall in 15 minutes, a floor in 5 days, and a 57-story tall building…
The floor and wall of the house are produced in batches in the factory, and then transported to the construction site to be directly assembled.
This building method of “building a house with building blocks” is quietly emerging, and the building of the house can also be so fast.
Prefabricated concrete components (PC components for short) are the basis for realizing the prefabrication of the main structure.
PC is widely used in Germany, Britain, the United States, Japan and other countries.
Developed countries have taken PC as the main mode of modern architecture.
However, China’s construction industry is still extensive and has not formed a standardized system.
The construction industrialization rate is only 1%, which is about 1/70 of the average level of developed countries.
There is great room for development.
While the PC production line ushers in great development, it also faces more problems to solve.
The development trend of the PC production line in the future should have the following characteristics: First, the PC production line developed into a nomadic or mobile PC production line needs equipment foundation, which is to use concrete as the foundation to fix the equipment.
The construction period is long, which requires earthwork excavation, cast-in-situ concrete, and maintenance.
The time to install the PC production line reaches 3 or 4 months.
In addition, in order to reduce the transportation cost, the transportation distance radiation range of PC production line is generally controlled within 200 kilometers.
After 200 kilometers, because of the large volume and high dead weight of these prefabricated concrete components, the logistics transportation cost of special component transport vehicles is high.
So when one construction site is completed, the PC production line needs to move to the next construction site, and it will take another 3 or 4 months to do the equipment foundation excavation and cast-in-place concrete.
The future development direction is to make the PC production line into a detachable track type.
The walking system and support system in the production line are all built on the track, which is similar to the track of the train.
There is no need to build the concrete equipment foundation, just like the Mongolian yurt nomadic way on the grassland.
On the one hand, it moves from one place to another, and also shortens the construction period of the PC production line.
It is expected that the relocation of the production line can be completed in half a month, 80% shorter than the current way.
Vanke Group is the first company in China to try to produce PC components in this way for nomadic PC production line.
In addition to adopting industrial assembly construction, Vanke has also built some fixed formworks on site as an attempt for nomadic PC production line in Xi’an Vanke City 8 # Phase I Lot 1 and Lot 3.
The construction was started in January 2015 and put into operation in April.
The current production capacity can basically meet the progress requirements of the four and five days and one floor of the two buildings.
The Vanke Garden project relies on the supporting nomadic PC production line, supplemented by the rapid construction system and the application of BIM technology.
The construction period of the project is shortened by a quarter, and the cost is saved, creating a double harvest of economic and social benefits.
However, the nomadic PC production line also has the defects of small capacity and low automation.
Now, Hebei Xuelong Machinery Manufacturing Co., Ltd.
has developed the first rail-type PC component production line in China, which has completely solved the disadvantages of the nomadic PC production line.
It has the advantages of portability, easy disassembly, high automation, and a wide range of components that can be produced, providing a better choice for PC component production.
Miniaturization of PC production line equipment of automatic production line II Currently, a PC production line is built in China, which has a significant feature of large investment and wide area.
In 2015, Guangdong CSCEC New Building Components Co., Ltd.
invested 100000 cubic meters of prefabricated components annually, with a total investment of 150 million yuan.
In the middle of September of the same year, the PC component factory of the first phase of Wuhan Green Building Industrial Park of China Construction Third Engineering Bureau was officially put into operation, with a building area of 34000 square meters.
In the next 3-5 years, China Construction Third Engineering Bureau will invest 6 billion yuan in the construction of the green building industrial park in Xinzhou District, Wuhan, with a planned area of 3000 mu.
Such PC component factories are high, which also indicates the high threshold of the industry and blocks a large number of investors who want to enter the industry.
In the National New Urbanization Plan (2014-2020), the spirit of the Central Urbanization Work Conference and the National Main Functional Area Plan were prepared in accordance with the new requirements of taking the new urbanization path with Chinese characteristics and comprehensively improving the quality of urbanization, which all require PC components and equipment to escort the construction of new towns, but it is obvious that tens of millions of PC production lines are not conducive to more investors to make more contributions to the construction of new towns.
The launch of miniaturized PC production equipment is imminent.
Whether the equipment investment can be controlled within 3 million yuan, and whether the component plant area can be controlled within 10000 square meters are all important issues for equipment manufacturers in the next step.
To realize the miniaturization of PC production line equipment can reduce the scale and capacity of the production line, and reduce the degree of automation according to the principle of economic adaptation.
With the improvement of the level of building industrialization and the development of building science and technology, various building systems and models are contending, such as the Jingda CL building system of Shijiazhuang Jingda Building System Co., Ltd., the ICF system of Harbin Hongsheng Building Technology Co., Ltd., the groove version system SW system of Tsinghua University Architectural Design and Research Institute Co., Ltd., and the frame-shear wall structure PC component system.
These systems are not compatible now, Self-formed system.
A PC production line can only produce products of a specific system.
If you want to produce multiple products, you need to invest in multiple system production lines, which increases a lot of investment costs.
You can try to produce multiple products in one production line, and use the common place of each system in the production of products.
Manufacturing equipment is indispensable for the production of prefabricated parts with excellent quality and precise docking.
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