What is a precast building? How are precast buildings produced? How is the site constructed? How about the cost? What are the advantages over other materials? This article will explain clearly.

After the indoor fine decoration is industrialized, express delivery can be received at home, which can be disassembled and installed quickly and well.

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

However, these are not enough for developers.

4.

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

The space at the lower part is narrow and inconvenient for observation.

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.

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

We just need to put them together at the construction site.

After the construction of the first floor is completed, the columns of the upper floor are hoisted first, followed by the main beam, secondary beam and floor slab.

When the reinforcement is bound, holes need to be reserved.

Hoisting of cast composite beams hoisting of cast composite plates can also be used for pre assembly or construction of cast exhibition areas on site for parts with great hoisting difficulties.

After the hoisting of precast components is completed, the reinforcement at the connection part shall be bound, and finally the cast-in-place layer of joints and beams and slabs shall be poured.

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

After the pre assembly of the frame structure girder and the hoisting of the exhibition area of the shear wall residence, the reinforcement of the cast-in-place layer shall be bound, and the cast-in-place layer concrete shall be prepared.

Knock on the blackboard and draw the key points: precast buildings have two important indicators, the proportion of assembly area and the prefabrication rate.

The construction site brother is very smart.

It is conducive to accelerating the progress of the project.

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

Cost control and design management are the finishing touches of the implementation process of precast buildings.

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

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

There is no love without reason in the world.

Understand the on-site construction process of precast structures with one drawing.

Through the reflection principle of the small dressing mirror, it is convenient to plug the reserved reinforcement at the lower layer into the holes of the cast column at the upper layer.

Walls, slabs, stairs and other cast components all have their own unique numbers.

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

“Assembly” is more than “erection”.

How are cast components produced? Take the precast building board as an example.

Do you guys still remember to take photos of yourself in your work? Haha, you are wrong.

The most eye-catching feature of the assembled column hoisting in the above figure is the appearance of the dressing mirror at the construction site.

Prefabrication rate = total volume of cast members ÷ total concrete volume.

6.

The production and construction process of finished cast components loaded on the road and transported to the site cast buildings has a much higher appearance value than the traditional concrete structures with flying dust and dusty face.

Lifting Pin Anchor

Assembly rate = implementation assembly area ÷ total floor area.

2.

It is conducive to civilized construction and safety management.

If you can make it clear with pictures, there is absolutely no nonsense.

In order to ensure the smooth lifting, after the precast components are transported to the site, it is necessary to reasonably arrange the stacking site to facilitate the lifting.

What is a precast building? Have you ever played LEGO? We can imagine the beams, slabs, columns, walls and other components made in advance as Lego blocks.

3.

They are temporarily stacked in the factory and ready to be transported to the construction site.

Now the management has cleared the clouds and seen the sunrise for the cast buildings.

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

5.

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

After the demoulding of the assembly line operation, the cast components of the finished precast board are completed.

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

It is conducive to regulating the supply relationship, improving the listing speed of real estate, slowing down the current situation of insufficient supply in the market, and there is no need to queue up all night to buy a house.

The efficiency is return.

Taking the primary and secondary beam connection nodes as an example, this paper shows the diversity of treatment methods for the connection between cast members: the primary and secondary beam connection edge nodes – the main beam reserved notch primary and secondary beam connection middle nodes – the main beam reserved post cast section primary and secondary beam connection nodes – how can there be no mistakes in the main beam with so many corbels? Fabricated component number!! In order to ensure that the workers will not make mistakes, reduce construction errors and speed up the project progress, we have applied for ID cards for each component, and they all have their own unique ID number, which is convenient for seating.

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

Shanghai leads the country in precast buildings, and is gradually increasing the requirements of prefabrication rate and assembly rate..

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

When the reinforcement is bound, the hook needs to be embedded in the concrete for pouring.

The production process is: steel formwork production → reinforcement binding → concrete pouring → demoulding.

In order to increase the connection between the cast members and the cast-in-place layer, and ensure the reliability and safety of the structure, the surface of the cast members shall be left with keyways or roughened.

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

It is conducive to environmental protection and resource conservation.

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

Why are these developed capitalist countries so keen on precast buildings? Benefits greatly ~1.

It is conducive to improving the construction quality.

How does this most important lifting step work? Look at the pictures.

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.

There are many connection modes between precast members.

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