All kinds of fabricated components such as walls, plates and stairs have their own unique numbers.
Is it right now that the clouds have been removed from the fabricated buildings and the sun has risen.
It is conducive to civilized construction and safety management.
Six prefabricated buildings, No.
Through the reflection principle of the small dressing mirror, it is convenient to plug the reserved reinforcement in the lower layer into the hole of the upper fabricated column.
The lower space is narrow and inconvenient for observation.
Taking the connection node of primary and secondary beams as an example, this paper shows the diversity of connection methods between fabricated components: the connection edge node of primary and secondary beams – the connection middle node of primary and secondary beams with reserved notches on the main beam – the connection node of primary and secondary beams with reserved post cast sections on the main beam – how can so many components with corbels on the main beam not make mistakes? Fabricated component number!! In order to ensure that workers will not make mistakes, reduce construction errors and speed up the progress of the project, we have applied for ID cards for each component, which have their own unique ID number to facilitate seating.
Now, a large number of site operations are moved to the factory.
The construction site brother is very smart, handsome.
Is it possible for the construction industry to realize the leap from “manual” labor to advanced “assembly line” production in 100 years? Is it possible to realize the leap from “overall” furniture to “assembled” furniture in 50 years? This is the dream of generations of architects.
2 as examples to see the implementation of prefabricated buildings: 25% of the total area of Hongshang effect implements prefabricated buildings, and the aboveground capacity residential area of Bay residential is 77994m2; The contract requires 25% of the area to be fabricated; seventy-seven thousand nine hundred and ninety-four × 0.25=19498m2； 3 high-rise buildings are fabricated buildings.
Knock on the blackboard and draw the key points: prefabricated buildings have two important indicators, the proportion of assembly area and prefabrication rate.
After the pre assembly of the frame structure girder and the hoisting of the display area of the shear wall residence, bind the reinforcement of the cast-in-situ layer and prepare to pour the cast-in-situ layer concrete.
Don’t you forget to take a selfie of smelly beauty at work? Ha ha, then you are wrong.
There are a large number of workers on the traditional operation site.
Holes shall be reserved during reinforcement binding.
What is a prefabricated building? Have you ever played LEGO (it’s OK to have seen it).
After demoulding in the assembly line, the fabricated components of the finished fabricated board shall be fabricated and stacked in the factory temporarily, and then they can be ready to be transported to the construction site.
Therefore, cost control is one of the key points in the implementation process of prefabricated buildings.
Prefabrication rate = total volume of fabricated members ÷ total concrete volume.
According to the requirements of assembly area in the transfer contract, the project cycle can be balanced through phased development.
What is the most technical requirement in the above steps? The answer is the hoisting of fabricated components.
After the construction of the first floor, the columns of the previous floor are hoisted first, and then the main beam, secondary beam and floor slab are hoisted.
The progress of prefabricated buildings is about 30% faster than that of traditional methods.
9 and No.
Therefore, such “industrialized” and “industrialized” buildings have been widely used in Europe, America and Japan.
After the hoisting of prefabricated components is completed, the reinforcement at the connection part shall be bound, and finally the node and the cast-in-situ layer of beam and slab shall be poured.
The scientific and technological content and production efficiency of the whole industry are very low, which is far inferior to that of manufacturing industry.
According to preliminary statistics, the cost increment is about 150 yuan for every 10% increase in prefabrication rate.
In addition, the reuse rate of steel formwork can be improved, and garbage, loss and energy saving can be reduced by more than half.
What can be explained clearly in the picture is absolutely no nonsense.
How is the most important lifting step operated? Look at the picture.
The dressing mirror is prepared for the hoisting of the fabricated column.
First of all, the assembly range should be avoided in the first opening area as far as possible.
The construction process takes the prefabricated frame structure as an example.
The higher the prefabrication rate, the higher the cost.
After the prefabricated components are transported to the construction site, the reinforced concrete will be overlapped and poured, so the assembly room is very safe.
It is conducive to accelerating the progress of the project.
During reinforcement binding, the hook shall be embedded in the concrete for pouring.
However, these are not enough for developers.
Cost control and design management are the finishing point of the implementation process of prefabricated buildings.
How to produce? How are fabricated components produced? Taking the fabricated building board as an example, the production process is: steel formwork fabrication → reinforcement binding → concrete pouring → demoulding.
At present, the floor slab is usually in the form of 7 + 8 (70mm thick precast floor slab + 80mm thick cast-in-situ layer).
However, in this oldest industry, the construction method today is still based on on-site pouring.
Hyaluronic acid, which is conducive to improving the construction quality of the construction industry, can make the construction products long-term and young.
There is no love for no reason in the world.
Only a small number of workers need to be left on the site, which greatly reduces the incidence of on-site safety accidents.
From then on, we bid farewell to “gray”.
Figure out the on-site construction process of prefabricated structure.
We can imagine the components made in advance such as beams, plates, columns and walls as Lego blocks, and just put them together at the construction site.
Just like moving, we usually arrange the goods handling sequence to reasonably reduce the workload.
The finished fabricated components are loaded on the road and transported to the site.
Take Hongkou commercial, Bay residential and Songjiang Zhongshan Street projects of Greenland No.
In order to increase the connection between the fabricated members and the cast-in-situ layer and ensure the reliability and safety of the structure, the surfaces of the fabricated members are left with keyways or roughened.
The production and construction process of the fabricated building has a much higher appearance value than the traditional concrete structure with flying dust and dusty face.
Like Toledo, prefabricated buildings prefabricate some or all components in the factory and then transport them to the construction site for assembly.
After the popularization of the industry, the construction cost can be reduced and the house price can be effectively restrained.
There are many connection modes between fabricated components.
It is conducive to environmental protection and resource conservation.
Due to the cooperation of prefabricated components with factories in advance and the limited production capacity of these factories, there is a great pressure on the time cost of the first phase of development..
Assembly rate = implemented assembly area ÷ total floor area.
11, are implemented in 50% of the total residential area of Zhongshan street, Songjiang.
The efficiency is return.
There are few original cast-in-situ operations on site, and the health does not disturb the residents.
If we take the cave of the cave man at the top of the mountain 30000 years ago as the “prototype” of the original building, to the “pyramid” with great difficulty and high level of construction technology 5000 years ago, to today’s world’s tallest building – Khalifa tower in Dubai, we have to admit that the construction industry can be called the most “ancient” industry.
In order to ensure the smooth lifting, after the fabricated components are transported to the site, the stacking site needs to be reasonably arranged to facilitate the lifting.
The hoisting of fabricated composite beam and fabricated composite plate can also be pre assembled on site or build a fabricated display area for the parts with great hoisting difficulty.
The most eye-catching feature of the assembled column hoisting in the figure above is the appearance of the dressing mirror at the construction site.
“Assembly” is not just “erection”.
After the indoor fine decoration is industrialized, express delivery can be received at home, that is, disassembly and installation, which is fast and good.
It is conducive to regulating the supply relationship, improving the listing speed of real estate, slowing down the current situation of insufficient market supply, and there is no need to queue up all night to buy a house.
Why are these developed capitalist countries so keen on prefabricated buildings? It is conducive to improve the construction quality.
The prefabricated components are prefabricated in the factory, which can maximally improve the common quality problems such as wall cracking and leakage, and improve the overall safety grade, fire resistance and durability of the residence.
So, what is a prefabricated building? How are prefabricated buildings produced? How is the site constructed? What about the cost? What are the advantages over other materials? Xiaobian takes you to understand.
After the concept of “prefabricated architecture” was put forward, we see the new hope of the traditional industry.