By Jinhao Wang, Chief Structural Engineer & Technical Director
As a licensed structural engineer holding a Master of Civil Engineering, I have 18 years of hands-on experience in modular construction R&D and global site delivery. I've led over 300 international modular camp deployments. All viewpoints in this article come from on-site troubleshooting and practical construction experience, rather than purely theoretical design standards.
1. Temporary Facility Planning for Multi‑Phase Linear Projects
Linear infrastructure projects such as water diversion, pipeline and highway works adopt phased advancing construction modes. As construction work zones move forward gradually, on-site staff accommodation, office spaces and supporting facilities require continuous layout adjustment and relocation throughout the entire project cycle.
Traditional temporary buildings are widely adopted in the construction industry and deliver stable performance for fixed, single-phase construction sites. Tailored for one-time fixed installation, they require complete demolition and reconstruction to match phased construction progress, which brings repetitive site workloads and incremental project costs. Under such project characteristics, reusable prefab container camp for multi‑phase construction projects serves as a practical and mature alternative for phased infrastructure development.
Can prefab container camp save construction time and labor cost? From my long-term site practice, modular camps deliver measurable time and labor advantages for multi-phase projects, driven by standardized factory prefabrication and detachable bolted assembly structures.
1.1 Modular Camp vs Traditional Temporary Building for Construction
When comparing modular camp vs traditional temporary building for construction, I always adopt a scenario-based evaluation approach, as both solutions have their own applicable project scenarios and value advantages.
Traditional temporary structures rely on on-site concrete pouring and welded fixation. They feature flexible on-site adjustment and low initial investment, well suited for short-term, fixed-location construction projects. Due to their integrated fixed structure, however, full disassembly and secondary turnover is difficult, limiting their adaptability for continuously advancing multi-phase construction.
In comparison, lightweight portable construction worker dormitory and quick assembly temporary construction camp building complete most fabrication, internal wiring and insulation works in factory environments. All on-site connections adopt detachable bolted structures, naturally fitting the frequent disassembly, transportation and reassembly demands of phased linear projects.
International Standard Interpretation for Global Engineers
1. Euroclass A1 Fireproof Rockwool: The project's fire insulation material complies with EU Euroclass A1 non-combustible standard, meeting mainstream European and American fire safety specifications for temporary buildings.
2. Hot-dip Galvanized Frame: All steel frames are fabricated perISO 1461 standards, delivering reliable anti-corrosion performance for high-salinity coastal construction environments.
2. On-Site Practice: Zhanjiang Coastal Multi‑Phase Camp Project
The Zhanjiang West-Guangdong Water Diversion Project is a typical long-cycle segmented linear infrastructure project with a 22-month total construction period. To coordinate with phased main project advancement, the entire construction camp needed regular disassembly and downstream relocation. The camp was built on undeveloped coastal tidal flats, covered by 0.8m to 1.2m thick soft marine silt.
The site features complex natural conditions: high groundwater levels, nightly tidal backflow, sudden short-duration rainstorms and persistent high-salt fog. Traditional pile foundations and thick concrete cushions can meet basic bearing demands for single-phase construction. Yet their lengthy 15-day-plus construction cycle and permanent fixed structure cannot match the rapid setup and repeated turnover requirements of multi-phase projects. Tidal water erosion also raises hidden quality risks including concrete hollowing and structural cracking.
2.1 Modular Scheme & Lightweight Foundation Implementation
We deployed modular units with Euroclass A1 fireproof rockwool insulation and ISO 1461 certified hot-dip galvanized steel frames, structurally rated for Level 10 coastal wind resistance. The 1120㎡ camp covers double-layer staff dormitories, on-site offices, canteens and restroom facilities, fully accommodating 210 on-site construction personnel.
Targeting the tidal flat's soft soil geology, we eliminated piling and deep excavation. Site crews removed unstable soft silt layers, backfilled and compacted dry sea sand in layers, and poured an 8cm thin cement cushion after three days of settlement stability observation. This lightweight foundation ensures safe structural bearing without permanent ground fixation, reserving complete operability for subsequent disassembly and multi-phase turnover.
Leveraging dry modular construction technology, our team completed full main structure hoisting and assembly within 48 hours, ensuring timely crew occupancy and greatly compressing traditional site preparation cycles.
2.2 On-Site Emergency Handling & Durability Optimization
Coastal weather brings unpredictable construction interruptions. During the main hoisting phase, a sudden rainstorm with Level 7 gusts hit the site. We immediately suspended hoisting operations, locked crane equipment, temporarily secured installed modules and evacuated all on-site workers. After weather conditions stabilized, we comprehensively inspected foundation flatness, module verticality and assembly joints, resuming construction only after confirming no settlement or offset abnormalities.
Residual soft soil stress caused minor inclination of individual dormitory units. We adopted jack fine adjustment, added galvanized steel gaskets for auxiliary reinforcement, and re-torqued all connecting bolts to restore standard structural levelness and verticality.
To sustain long-term reusability in high-salt coastal environments, we optimized waterproof and anti-corrosion performance in targeted ways. All panel seams and roof overlapping joints adopt dual protection combining weather-resistant structural sealant and waterproof coil edge sealing. We polished and recoated anti-corrosion primer and finish paint for frame welding points and transport-scratched surfaces. Reserved bottom ventilation gaps also effectively eliminate trapped damp air, preventing frame rust and long-term structural degradation.
2.3 Acceptance & Field-Verified Reuse Performance
During final project acceptance, we completed closed-loop rectification of two on-site construction details. We installed anti-corrosion protective sleeves for all exposed bolts, and removed voided, uncompact sealant for secondary filling and compaction. The entire camp passed official inspection and was officially put into service.
The core advantage of this modular solution lies in multi-phase turnover capability. The full bolted assembly requires no on-site welding or permanent structural fixation. Upon completion of each construction segment, all modules can be fully disassembled, stacked and transported to new work zones for reassembly. The project's actual module loss rate after disassembly is below 8%, effectively cutting repeated temporary construction investment for long-term phased projects.
3. Time & Labor Cost Benefit Analysis
Returning to the key industry inquiry: Can prefab container camp save construction time and labor cost? The Zhanjiang coastal project delivers verified, field-proven answers.
Factory prefabrication streamlines complex on-site construction procedures. Dry modular erection avoids frequent downtime caused by coastal rainy and humid weather conditions. Most importantly, the reusable modular structure eliminates repetitive temporary facility procurement, construction and demolition work across successive project phases, delivering stable time and labor cost savings throughout the full project lifecycle.
Every construction project has unique site conditions and operational demands. Coastal sites with multi-phase relocation plans require customized engineering tuning for temporary camp systems, including tailored non-permanent foundations, enhanced anti-corrosion treatments and wind-resistant structural details aligned with local climate and geological conditions. When evaluating facility solutions, project managers should prioritize full-lifecycle value assessment alongside upfront construction costs.
4. Conclusion & B2B Call to Action
For water conservancy, pipeline, highway and other long-cycle multi-phase linear projects, reusable modular camps serve as a reliable temporary facility solution. With site-specific structural optimization and anti-corrosion reinforcement, modular units maintain stable performance in harsh coastal environments and support multiple low-loss turnovers, perfectly matching the operational characteristics of phased infrastructure construction.
If you are planning temporary staff accommodation for coastal, long-cycle or multi-phase infrastructure projects, reach out to our professional engineering team. Share your project's site conditions, wind resistance requirements, crew scale and relocation cycles, and we will deliver targeted modular camp design and full-lifecycle cost optimization solutions tailored to your project.
