Sanshui Cement Prefabricated Housing

There is a construction case of cement prefabricated assembled housing structure in Sanshui District, located in Sanshui District, Foshan City, Guangdong Province. It is a three-story frame-structured cement prefabricated assembled residential building.

Project Overview and Construction Characteristics

This case has a total construction area of approximately 1,200 square meters and a building height of 10.5 meters. The seismic fortification intensity is 7 degrees, and it adopts a prefabricated assembled monolithic frame structural system. The prefabricated components include prefabricated columns, beams, composite floor slabs, stairs, and exterior wall panels, etc. The prefabrication rate exceeds 75%, significantly shortening the on-site construction time. The total project duration is 180 days, with a prefabricated component production cycle of 60 days and only 90 days required for on-site assembly, reflecting the efficient model of "factory prefabrication and on-site assembly". The construction process is divided into three sections by floor. During the assembly of the main structure, prefabricated columns, beams, and composite floor slabs are installed layer by layer on each floor, and finally, concrete is poured in the core areas of the joints to ensure structural integrity.

Performance and Maintenance

After three years of use, the overall structural stability of the cement prefabricated house is good, with strong durability and seismic resistance. However, seasonal maintenance is required. During the rainy season or high-temperature seasons, issues such as leakage and dampness may occur. It is necessary to regularly inspect the roof, wall connections, and door and window seals, and promptly repair cracks or apply waterproof materials. In addition, the amount of construction waste generated is reduced by more than 60% compared to traditional construction, meeting the requirements of green construction.

Advantages and Disadvantages Analysis

Advantages:

1. Short construction period and low cost: Factory production and on-site assembly are carried out in parallel, with the construction period being about half of that of traditional construction.
2. Excellent seismic performance: The prefabricated components produced by regular companies pass strict quality inspections, and the joint connections are reliable, meeting the requirements of seismic fortification intensity of 7 degrees.
3. Outstanding environmental protection: Reduces on-site wet operations and lowers dust and noise pollution.

Disadvantages:

1. Limited spatial flexibility: The fixed sizes of prefabricated components make it difficult to achieve complex floor plans or personalized layouts.
2. Poor thermal insulation and sound insulation: The walls are relatively thin, and additional insulation layers are required in cold regions; the sound insulation effect depends on the material of the components and the tightness of the joint connections.
3. Low applicability for high-rise buildings: For structures above three stories, the connection and fixation need to be strictly evaluated, and long-term use may pose safety hazards.
4. Risk of joint cracking: During the assembly process, micro-cracks may appear at the joints of the components due to settlement or temperature changes, requiring regular maintenance.

Applicable Scenarios

Such houses are suitable for low-rise residential buildings, temporary buildings, or projects sensitive to construction period and cost. However, it is necessary to select regular enterprises and have professional teams carry out the construction to ensure structural safety and functionality.