Prefabricated Overall House Hoisting

Prefabricated overall house hoisting is an industrial construction method that involves prefabricating building modules or components in a factory, transporting them to the site, and then using hoisting equipment for overall hoisting and installation. Its core processes include prefabricated production, mechanized hoisting, and modular assembly, offering significant advantages such as high efficiency, precision, and environmental friendliness.

I. Core Processes and Technical Characteristics

1. Prefabricated Production
   Components such as ceilings, floors, and water and electricity pipelines are prefabricated on factory assembly lines to form independent modules or overall structures. For example, container houses adopt a fully prefabricated model and are directly hoisted into place on-site; modular buildings decompose the structure into independent modules (such as concrete modules and steel structure modules), which are manufactured in the factory and then transported to the site. Factory production reduces human errors through standardized processes, ensuring that module dimensions are controlled to the millimeter level, laying the foundation for subsequent hoisting and assembly.

2. Hoisting and Installation Methods
   Mobile cranes, tower cranes, and other equipment are used to lift prefabricated modules, which are then moved to designated positions and fixed using specialized hoisting plans (such as the dual-crane sliding method and single-crane lifting method). For ultra-hazardous and large-scale projects (such as large tower containers or high-rise building modules), computer-aided simulation is required to optimize the hoisting path and verify the foundation's bearing capacity to ensure safety. For example, in the permanent wellhead hoisting project of the main shaft of Jindiao Coal Mine by Shandong Ronghui Group, a segmented prefabrication and overall hoisting approach was adopted, achieving one-time installation of accessories and significantly shortening the construction period.

II. Application Scenarios and Core Advantages

1. Rapid Delivery and Short Construction Cycles
   Suitable for scenarios such as construction site dormitories, temporary offices, and guardhouses, some projects can achieve "hoisting and use on the same day." Modular construction reduces the construction period by more than 60% compared to traditional construction. For example, the Tianzhu County Rural Revitalization Project used hoisted houses as affordable housing, with production to occupancy taking only a few weeks.

2. Quality Control and Structural Safety
   Factory production reduces on-site construction errors, and modules are connected using steel bar splicing and concrete pouring techniques to ensure structural integrity. For example, concrete modules have pre-embedded connectors during factory prefabrication, and on-site connections are achieved through wet connections (pouring concrete) or dry connections (bolt fixation) for stable assembly.

3. Environmental Protection, Energy Efficiency, and Green Construction
   On-site operations are reduced by more than 80%, significantly lowering noise, dust, and construction waste. Modular buildings meet green building standards, with material recycling rates exceeding 90%. For example, steel structure modules can be reused after demolition, reducing resource waste.

III. Technical Support and Typical Cases
Hoisting of prefabricated components requires specialized plans based on project scale, and ultra-hazardous and large-scale projects require finite element analysis to verify structural stability. The 2023 Tianzhu County Rural Revitalization Project adopted lightweight steel structure hoisted houses, achieving rapid assembly through optimized module design; in the 2026 main shaft hoisting project of Jindiao Coal Mine by Shandong Ronghui Group, large tower cranes were used to precisely position hundred-ton modules, demonstrating the feasibility of this technology in complex projects.

Prefabricated overall house hoisting promotes the transformation of the construction industry towards high efficiency, precision, and sustainability through the combination of industrial production and mechanized installation, becoming an important direction for the future development of construction industrialization.