Transportation of Prefabricated Concrete Houses
The transportation of prefabricated concrete houses requires coordinated completion through disassembly, prefabrication, transportation, lifting, and assembly. The core processes and key requirements are as follows:
1. Modular Disassembly and Factory Prefabrication
Prefabricated concrete houses need to be disassembled into independent modules in the factory, with each module containing a complete structure, plumbing and electrical systems, and interior decoration. For example, in the case of Dongguan Port in Guangdong, the module dimensions are consistent with standard containers, facilitating ocean freight loading. Prefabricating modules in the factory ensures uniform component precision and quality while shortening the on-site construction period. Modular design must balance transportation constraints (such as road width and bridge load capacity) with assembly convenience to avoid transportation difficulties or increased on-site adjustment costs due to oversized modules.
2. Transportation Methods and Equipment Selection
The transportation process requires selecting appropriate methods based on module weight, dimensions, and transportation distance. Ocean freight is suitable for transnational or intercontinental projects, such as modules from Dongguan Port being shipped to ASEAN markets via ocean-going vessels; land transportation relies on flatbed trailers or special transport vehicles, with routes planned in advance to avoid height and weight restrictions. Module weight directly affects transportation costs; for example, in the Qixian, Henan case, 30-ton concrete modules required heavy-duty flatbed trucks for transportation, accompanied by professional escort vehicles to ensure safety.
3. Lifting Technology and Coordination Efficiency
Lifting is a critical link between transportation and on-site construction. Large lifting equipment (such as truck cranes and crawler cranes) are core tools, with lifting capacities that must cover the maximum module weight. For example, in the Qixian case, a crane needed to complete the lifting of a 200㎡ three-story villa main structure within 4 hours, requiring precise equipment positioning and efficient operator coordination. Lifting plans must be planned in advance, including module stacking order, lifting point design, and assembly sequence, to minimize on-site adjustment time. Box-type prefabricated buildings, which rely on functional unit combinations, have higher requirements for lifting precision and require BIM technology to simulate the lifting process to avoid collisions or assembly errors.
4. On-Site Assembly and Quality Inspection
After modules arrive on-site, they must be assembled according to design drawings, with a focus on inspecting connection points (such as bolt tightness and welding quality) and sealing performance (such as doors, windows, and roof waterproofing). After assembly, an overall inspection is required, including structural stability, plumbing and electrical system functionality, and decoration details, to ensure compliance with design specifications and usage requirements. Due to the high degree of factory prefabrication, on-site assembly errors for modular buildings are typically controlled to the millimeter level, significantly improving construction efficiency and quality.
Summary: The transportation of prefabricated concrete houses requires coordinated planning of module design, transportation methods, lifting technology, and on-site assembly, achieving efficient collaboration through standardized processes and specialized equipment to ultimately ensure building quality and construction safety.
