The final estimated impact is about 75 yuan/m2; 1.

The precast components of this project include: precast stairs, precast diaphragm walls, and precast composite slabs.

In fact, the role of actual construction to reduce costs is relatively small.

With the maturity of the precast partition technology, the price of main materials will gradually decrease, and because the precast partition cancels the secondary structure of conventional buildings, it will also help to shorten the construction period of the project; ③ Precast composite slab affects one side: component picture: the composite slab is 60mm precast, 80mm thick, and the overall thickness is 140mm.

If it is possible to consider canceling the optimization of the decoration of precast stair flight, the cost of precast components can be reduced; 2.

Theoretically, due to the high accuracy of precast components of the laminated floor itself, it can also reduce some decoration costs for the optimization of partial ceiling decoration and ceiling repair; ④ Single side of overall impact: 1.

In addition, with the gradual maturity of the prefabrication process, the cost of main materials and other parts will be reduced, and the final cost of precast stairs may be lower than that of cast-in-place stairs; ② The influence of precast interior partition wall on the single side: component picture: the secondary structure is canceled for the precast method, and the decoration part is considered according to the conventional method, which increases the cost by about 70 yuan per square meter; 1.

Theoretically, due to the high accuracy of precast components, it can be considered to cancel or reduce the leveling thickness, and directly carry out putty construction, which can reduce the decoration cost accordingly; 2.

At present, most of the composite slabs are reinforced at four sides (Detail III), which has a great impact on the construction difficulty and construction cost, and the corresponding impact will be reduced when the composite slab technology is more mature and new forms of precast composite slabs appear; 3.

In response to the national call, local governments have made specific requirements for the assembly rate and prefabrication rate of new projects of corresponding specifications; So many times during the interview, Party A raised questions about the precast buildings.

Cast in Sockets

The central government and the State Council have proposed that it will take about 10 years for precast buildings to account for 30% of new buildings.

1、 The project is located in the urban area of a city in East China, with a total construction area of more than 200000 m2; 2、 The background of the case is the promotion of precast buildings.

If the “pipeline separation” process can be considered, the thickness of the corresponding composite plate should be reduced, and the main reinforcement and other components that respond to the reduced ground load are reduced, which also facilitates the maintenance of the pipeline in the later period of the project; 2.

Thickening of the composite plate is because the centerline pipe is embedded in the cast-in-place slab in the traditional process.

This time, a typical residential project is selected to share the common precast components of the project.

In order to meet the needs of pipe embedding, the thickness of the cast-in-place floor is thickened.

3、 Unilateral analysis case: select a project to analyze the individual impact of precast components on each project, and give some suggestions on optimizing space for each precast component.

The increase of measure cost mainly comes from the dispersed precast component manufacturers, the increased component transportation cost, and the large increase of vertical transportation cost due to the dead weight of precast components; 4、 To sum up, in general, the prefabrication rate of this residential project at 30% will increase the design cost by about 240 yuan/m2.

The real big heads are in the front.

However, the cost of most existing projects is increasing, and the benefits of assembly have not yet been reflected.

① Unilateral influence of precast stairs: component picture: the platform is considered as cast-in-situ, the precast stair formwork and reinforcement are included in the unit price of precast concrete, and the decoration practice is not adjusted according to the routine; The practice of this project compared with the unilateral impact is 15 yuan/m2; 1.

Because the bottom of the composite slab is a precast component, in theory, the internal full scaffold can be canceled and independent support can be considered for the post cast strip of the composite slab to reduce the cost of some measures; 4.

Introduction Since the beginning of 2016, precast buildings have been paid more and more attention by the government and the construction party.

The key questions were how much the precast buildings had affected and whether there were some optimization suggestions for precast buildings.

National policies, Party A’s management mode, the assembly thinking of design, the high standardization of manufacturers, and these issues at the front of the project cycle affect the cost of assembly buildings.

And according to the calculation of other precast projects, every 10% increase in the prefabrication rate will increase the unilateral impact by about 100 yuan/m2; Compared with conventional practices, the cost of precast buildings under foreign mature technologies is actually lower than that of conventional buildings, which has many advantages such as reducing the construction cycle, reducing late maintenance costs, energy conservation and emission reduction, and reducing labor costs.

With the rapid development of precast buildings in China today, it is believed that in the near future, the domestic precast building technology can also take the lead in the world-.

Considering the need to design and issue detailed drawings for precast buildings, the design cost will be increased; The specification and design of precast components will be more mature, which is expected to reduce some costs; 2.

The precast reinforcement and formwork are included in the unit price of precast concrete, and the decoration method remains unchanged; The cast-in-place floor slab is 130mm thick.

Party A asks how the precast buildings have an impact on one side, and what are the impact points; Precautions and optimization suggestions.