Prefabricated Assembly-Type Housing for High-Rise Buildings

Prefabricated assembly-type housing has mature applications in the field of high-rise buildings, with technical systems covering prefabricated concrete structures and steel structures, supporting the construction of high-rise residential buildings up to approximately 47 floors (140 meters) and meeting mandatory building standards such as seismic resistance.

I. Technical Types and Component Composition

Prefabricated assembly-type housing in high-rise buildings mainly adopts two types of technical systems:

1. Prefabricated Concrete Structures: These primarily consist of prefabricated beams, slabs, walls, and columns, which are assembled on-site to form an integral structure. This type of technology is suitable for mid- to high-rise residential buildings, offering high construction precision and durability.
2. Steel Structure Systems: These use steel members as the framework, combined with prefabricated floor slabs and exterior wall panels. They are lightweight and have excellent seismic performance, often used in super high-rise or complex-shaped buildings.

Both technologies involve the standardized production of components in factories, reducing on-site wet work and improving construction efficiency and quality control.

II. Efficient Advantages of Modular Construction

Modular construction is a highly integrated model of prefabricated assembly-type housing, with its core being the prefabrication of functional units (such as complete room modules) in factories and their on-site assembly. For example:

• Construction Speed: A 16-story building composed of 298 modules can be delivered in just 120 days from the first hoisting, reducing the construction period by 60% compared to traditional methods; a 30-story building can be capped with fine decoration in about 148 days.
• Quality Assurance: Modules are completed with decoration and pipeline pre-embedding in the factory, reducing errors from on-site cross-operations and improving the overall performance of the building.

III. Practical Cases and Limits of High-Rise Applications

Existing technologies have broken through the bottleneck of high-rise applications:

• Domestic Practice: The Shenzhen Anju Jingxinyuan project is a 30-story assembled building that uses steel structure modular technology, successfully verifying the feasibility of high-rise applications.
• Technical Limits: Currently, the highest application is for high-rise residential buildings of approximately 140 meters (47 floors), with structural safety and construction precision meeting regulatory requirements.

IV. Seismic and Safety Performance

High-rise prefabricated assembly-type housing adopts reinforced concrete structures or steel structures, with seismic design intensities determined according to the national "Building Seismic Design Code". Node connection technologies (such as grout sleeves and bolt connections) ensure structural integrity. For example, the Shenzhen project is designed with a seismic design intensity of 8 degrees, fully complying with mandatory building standards and offering safety equivalent to that of traditional cast-in-place structures.

Summary: Through technological iterations and engineering practices, prefabricated assembly-type housing has become an efficient solution for high-rise buildings, combining advantages in speed, quality, and safety. It is expected to expand to even higher floors in the future.