The implementation of prefabricated modular home buildings can take technological improvements as a breakthrough in reducing construction costs.
Design Optimization
Adopt a scientific and reasonable design scheme, and indirectly increase the added value of fabricated buildings, thereby reducing the cost of construction. Therefore, the method design can be optimized from the methods of modulus, standardization, use function, in-situ pouring and prefabrication.
(1) To improve the assembly rate, columns, exterior walls, interior walls, and floors can be prefabricated to reduce costs.
(2) The structural part can adopt high-strength concrete and steel bars to reduce the amount of materials.
(3) The main structure, interior decoration, water and electricity installation, etc. can adopt industrialized integration technology.
(4) Components for building envelopes, balconies, stairs, air-conditioning panels, doors and windows, etc., can be industrialized.
(5) Durable, one-shot construction materials can be used for exterior wall decoration.
(6) Optimize the waterproof design, which can achieve the beautiful appearance without affecting the waterproofing of the external wall.
(7) Promote the application of building information modeling (BIM) technology in the process of prefabricated construction, and realize the entire life cycle data sharing and information management of prefabricated construction projects.
Production and construction optimization
(8) Improve the production process of prefabricated components, increase module utilization efficiency, and reduce amortization costs of manufacturers.
(9) Optimize the installation process of prefabricated components, improve the efficiency of workers and machinery, and reduce their consumption.
Regulating market competition
In view of the fact that prefabricated components account for most of the cost of prefabricated construction, and there are fewer prefabricated component manufacturers in the prefabricated construction industry, price monopoly is more common. If laissez-faire prices remain high, it will inevitably seriously affect the healthy development of the fabricated building industry. Therefore, you should:
(10) Strengthen relevant administrative units' price supervision of prefabricated component manufacturers and regulate market competition.
Government increases support
At present, the high cost of prefabricated buildings is a widely accepted fact. In order to make prefabricated buildings account for 30% of the new building area in the next ten years, reducing costs is a key issue that must be addressed first. For the construction party, party A, and government:
(11) The government should take the lead in increasing support, increase subsidies and reduce taxes. The Status and Future of Prefabricated Buildings from the Perspective of Cost
Exam 2020-02-25 11:54
International standard original factory production, direct sales at low prices, and extreme guarantee services. Thousands of choices! Prefabricated construction, one-stop purchase, great benefits.
International standard original factory production, direct sales at low prices, and extreme guarantee services. Thousands of choices! Prefabricated construction, one-stop purchase, great benefits.
Aluminum profile specifications-the world's flagship authorized monopoly, brilliant quality, upgraded functions, and no problems in life.
Aluminum profile specifications-the world's flagship authorized monopoly, brilliant quality, upgraded functions, and no problems in life.
Men with good kidneys generally have 4 similarities before going to bed. If you have them, it means that the kidneys are good!
Men with good kidneys generally have 4 similarities before going to bed. If you have them, it means that the kidneys are good!
The implementation of prefabricated buildings can take technological improvements as a breakthrough in reducing construction costs.
Design Optimization
Adopt a scientific and reasonable design scheme, and indirectly increase the added value of fabricated buildings, thereby reducing the cost of construction. Therefore, the method design can be optimized from the methods of modulus, standardization, use function, in-situ pouring and prefabrication.
(1) To improve the assembly rate, columns, exterior walls, interior walls, and floors can be prefabricated to reduce costs.
(2) The structural part can adopt high-strength concrete and steel bars to reduce the amount of materials.
(3) The main structure, interior decoration, water and electricity installation, etc. can adopt industrialized integration technology.
(4) Components for building envelopes, balconies, stairs, air-conditioning panels, doors and windows, etc., can be industrialized.
(5) Durable, one-shot construction materials can be used for exterior wall decoration.
(6) Optimize the waterproof design, which can achieve the beautiful appearance without affecting the waterproofing of the external wall.
(7) Promote the application of building information modeling (BIM) technology in the process of prefabricated construction, and realize the entire life cycle data sharing and information management of prefabricated construction projects.
Production and construction optimization
(8) Improve the production process of prefabricated components, increase module utilization efficiency, and reduce amortization costs of manufacturers.
(9) Optimize the installation process of prefabricated components, improve the efficiency of workers and machinery, and reduce their consumption.
Regulating market competition
In view of the fact that prefabricated components account for most of the cost of prefabricated construction, and there are fewer prefabricated component manufacturers in the prefabricated construction industry, price monopolies are more common. If laissez-faire prices remain high, it will inevitably seriously affect the healthy development of the fabricated building industry. Therefore, you should:
(10) Strengthen relevant administrative units' price supervision of prefabricated component manufacturers and regulate market competition.
Government increases support
At present, the high cost of prefabricated buildings is a widely accepted fact. In order to make prefabricated buildings account for 30% of the new building area in the next ten years, reducing costs is a key issue that must be addressed first. For the construction party, party A, and government:
(11) The government should take the lead in increasing support, increase subsidies and reduce taxes.
Reasons for the cost difference between prefabricated construction projects and traditional construction projects
Structural difference
The structural differences between prefabricated buildings and traditional buildings determine their higher engineering costs, which are reflected in the following aspects:
(1) For traditional shear wall structure buildings, hollow brick blocks are adopted for partition walls; and prefabricated reinforced concrete partition wall panels are adopted for prefabricated construction concrete structures;
(2) The floor of the traditional shear wall structure building adopts cast-in-situ structure, while the PC structure of the prefabricated construction project uses laminated panels, the total thickness is thicker than that of the traditional floor;
(3) The concrete structure of prefabricated construction requires joint grouting, but the traditional shear wall structure does not need it.
Material usage differences
In addition to structural differences, the high cost of prefabricated buildings in terms of building materials, PC construction, and construction costs also determines that their engineering costs are high:
(1) High grade of materials: In the prefabricated building, partition walls are used instead of brick walls, and the grade of materials is increased, which leads to higher costs. Taking the masonry of traditional construction engineering at 0.15m3 / m2 as an example, the A4-23 thickness of 190mm will be charged directly at 405 yuan / m3, and the cost will not exceed 800 yuan / m3. The average thickness of the concrete structure wall material for prefabricated construction projects is 2410 yuan / m3, the difference between the two is at least 1601 yuan / m3, so the wall difference should be 0.15 × 1601 = 240.15 yuan / m2.
(2) Multiple materials usage: Prefabricated building floors use laminated boards. Generally speaking, the thickness of the PC board is 6cm, and the cast-in-situ cast board is 8cm, which is at least 2cm thicker than the ordinary floor, and the cost difference is 16 yuan / m2; In addition, the content of prefabricated building concrete and steel bars is 0.06m3 / m2, 0.10m3 / m2 higher than that of traditional buildings.
It also leads to higher costs.
(3) The average price of PC components for prefabricated construction projects is 2500 yuan / m3, which is 500 yuan / m3 higher than the price of cast-in-place concrete of 2,000 yuan / m3.
Immature construction process
According to the field investigation, it was found that the cross-construction of precast parts hoisting and cast-in-situ component pouring did not save construction time compared to cast-in-situ cast alone. In addition, due to the immature construction technology of prefabricated buildings, the tightness of in-situ pouring and hoisting is not high, which causes the construction period to be not effectively saved and the cost to increase.
Outlook
In terms of material prices, due to the current low demand in the prefabricated construction market, so that the production capacity of PC component manufacturers is low, and the previous financial amortization costs are high. In addition, the current market monopoly is also an important factor in the persistently high PC prices. But with the government's implementation of prefabricated buildings, the monopoly market will be broken, and there will be some room for price reduction in the future.
In terms of taxes and fees, as the government vigorously promotes prefabricated buildings, a series of preferential policies and tax exemption and reduction measures will be introduced in the future to promote the development of prefabricated construction projects. In terms of technology, with the advancement of technology and the gradual market scale Expansion will reduce the cost of prefabricated construction projects; as labor costs continue to rise, the engineering cost of traditional dwellings will rise faster, and the advantages of PC dwellings will become increasingly apparent.
The PC housing cost per square meter may have a significant price reduction within 3 to 5 years, so that the PC housing cost will be equal to or slightly lower than the traditional house. In the foreseeable future, the PC housing cost will be lower than the traditional house cost and the quality Higher, if you can take the hardcover route, the advantages will be more obvious.