01.

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

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.

Therefore, it is not unreasonable for the state to promote precast buildings.

Although they look very simple, they need accurate data to ensure successful splicing, so they also need to be extra careful in drawing.

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

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

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

Precast buildings have two important indicators, the proportion of assembly area and prefabrication rate.

When building the interior wall, first install the skeleton, and then directly splice it, which is not only convenient and fast, but also convenient for subsequent demolition and modification.

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

They all have their own unique ID number to facilitate seating.

When binding reinforcement, the hook shall be embedded in it.

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

There can be a variety of connection modes between cast components, At present, the floor is usually in the form of 7 + 8 (70mm thick precast floor + 80mm thick cast-in-situ layer).

3.

What is the precast building from production to construction? What are the advantages? How are precast buildings produced? How is the site constructed? Xiaobian takes you to understand.

03.

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.

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

Take the connection node of primary and secondary beams as an example to show the diversity of connection methods between cast members: connection edge node of primary and secondary beams – reserved notch of main beam – connection middle node of primary and secondary beams – connection node of primary and secondary beams of main beam reserved post cast section – how can there be no error in setting so many corbels on the main beam? That is to give cast members Piece number! In order to ensure that workers will not make mistakes, reduce construction errors and speed up the progress of the project, each component is provided with an ID card.

It is conducive to improve the construction quality.

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.

What is the most technically demanding of the above steps? The answer is the hoisting of cast components.

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.

“Assembly” is not just “erection”.

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.

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

Concrete pouring and assembly line operation.

Source: Tencent video, the copyright of Xinzhu classroom belongs to the original author.

4.

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.

5.

The lower space is narrow and inconvenient to observe.

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

Shim Pack

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

Holes shall be reserved during reinforcement binding.

What are the advantages of precast buildings? Why are these developed capitalist countries so keen on precast buildings? The reasons are as follows: 1.

After demoulding, the finished cast plates and cast components are cast, temporarily stacked in the factory by category, and can be ready to be transported to the construction site.

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

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

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

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 accelerating the progress of the project, and the efficiency is return.

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

It is conducive to environmental protection and resource conservation.

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.

Assembly rate = implemented assembly area ÷ total floor area.

02.

6.

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

After the construction of the first floor, the columns of the upper floor are hoisted first, and then the main beam, secondary beam and floor slab are hoisted.

05.

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.

First of all, on the external wall, this lock type splicing method is used, and some are butted with reinforcement skeleton.

04.

Compared with traditional construction methods, precast buildings can not only be faster and more convenient, but also save manpower and materials.

It is conducive to civilized construction and safety management.

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.

2.

How is the most important lifting step operated? The dressing mirror in the figure above is prepared for the hoisting of the cast column.

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

In the whole construction process, these small precast slabs are the most important.

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

Then fill, and finally add sealing strip caulking glue.

2.

What is a precast building? Like Lego, a precast building precast some or all components in the factory and then transported to the construction site for assembly.