In order to increase the connection between the cast members and the cast-in-situ layer and ensure the reliability and safety of the structure, the surfaces of the cast members are left with keyways or roughened.

However, in this oldest industry, the construction method today is still based on on-site pouring.

After the precast components are transported to the construction site, the reinforced concrete will be overlapped and poured, so the assembly room is very safe.

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.

There is no love for no reason in the world.

The finished cast components are loaded on the road and transported to the site.

The dressing mirror is prepared for the hoisting of the cast column.

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.

The construction process takes the precast frame structure as an example.

Only a small number of workers need to be left on the site, which greatly reduces the incidence of on-site safety accidents.

During reinforcement binding, the hook shall be embedded in the concrete for pouring.

In addition, the reuse rate of steel formwork can be improved, and garbage, loss and energy saving can be reduced by more than half.

How to produce? How are cast components produced? Taking the cast building board as an example, the production process is: steel formwork fabrication → reinforcement binding → concrete pouring → demoulding.

The production and construction process of the cast building has a much higher appearance value than the traditional concrete structure with flying dust and dusty face.

What is a precast building? Have you ever played LEGO (it’s OK to have seen it).

After the concept of “precast architecture” was put forward, we see the new hope of the traditional industry.

Don’t you forget to take a selfie of smelly beauty at work? Ha ha, then you are wrong.

What is the most technical requirement in the above steps? The answer is the hoisting of cast components.

How is the most important lifting step operated? Look at the picture.

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.

The scientific and technological content and production efficiency of the whole industry are very low, which is far inferior to that of manufacturing industry.

3.

Therefore, such “industrialized” and “industrialized” buildings have been widely used in Europe, America and Japan.

6.

The progress of precast buildings is about 30% faster than that of traditional methods.

It is conducive to accelerating the progress of the project.

The precast components are precast 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.

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.

Why are these developed capitalist countries so keen on precast buildings? Benefits greatly drop ~ 1 It is conducive to improve the construction quality.

4.

Erection Anchor

Now, a large number of site operations are moved to the factory.

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.

Hyaluronic acid, which is conducive to improving the construction quality of the construction industry, can make the construction products long-term and young.

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.

5.

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.

“Assembly” is not just “erection”.

Just like moving, we usually arrange the goods handling sequence to reasonably reduce the workload.

After the hoisting of precast 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.

Like Toledo, precast buildings prefabricate some or all components in the factory and then transport them to the construction site for assembly.

2.

After the popularization of the industry, the construction cost can be reduced and the house price can be effectively restrained.

Holes shall be reserved during reinforcement binding.

The efficiency is return.

Figure out the on-site construction process of precast structure.

After demoulding in the assembly line, the cast components of the finished cast board shall be cast and stacked in the factory temporarily, and then they can be ready to be transported to the construction site.

It is conducive to environmental protection and resource conservation.

It is conducive to civilized construction and safety management.

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 cast column.

There are a large number of workers on the traditional operation site.

After the indoor fine decoration is industrialized, express delivery can be received at home, that is, disassembly and installation, which is fast and good.

In order to ensure the smooth lifting, after the cast components are transported to the site, the stacking site needs to be reasonably arranged to facilitate the lifting.

There are many connection modes between cast components.

From then on, we bid farewell to “gray”.

The hoisting of cast composite beam and cast composite plate can also be pre assembled on site or build a cast display area for the parts with great hoisting difficulty.

The lower space is narrow and inconvenient for observation.

What can be explained clearly in the picture is absolutely no nonsense.

So, what is a precast building? How are precast buildings produced? How is the site constructed? What about the cost? What are the advantages over other materials? Xiaobian takes you to understand.

The construction site brother is very smart, handsome.

At present, the floor slab is usually in the form of 7 + 8 (70mm thick precast floor slab + 80mm thick cast-in-situ layer)..

There are few original cast-in-situ operations on site, and the health does not disturb the residents.