Hướng dẫn chi tiết biện pháp thi công lắp ráp kết cấu thép đáy và thành hồ nước chữa cháy đạt chuẩn chất lượng cao. Giải pháp an toàn, tối ưu chi phí từ Công ty Chuẩn A.
In the safety infrastructure of modern industrial plants, industrial parks, and high-rise buildings, the firefighting water reservoir system acts as the "heart," providing a continuous water supply for the entire fire suppression system. Offering superior advantages such as rapid construction progress, exceptional load-bearing capacity, 100% waterproofing reliability, and long-term operating lifespan, steel structure fire-fighting water tanks are rapidly replacing traditional concrete basins.
However, to ensure that a reservoir holding thousands of cubic meters of water operates safely under extreme pressure without leaks or structural deformation, the construction and assembly method for the steel bottom and wall structures requires absolute precision from initial survey and fabrication to on-site erection.
As a leading contractor in the field of steel structure consulting, design, and execution for fire protection systems, Chuan A Company hereby shares our standardized technical procedure that complies with the most stringent Vietnamese (TCVN) and international standards.
Firefighting water reservoirs serve as a mandatory backup water source, ensuring continuous water flow and pressure for sprinklers, hydrants, and water curtain systems during emergencies. Any minor failure, such as bottom leakage or wall cracking, not only results in property damage but also paralyzes the entire fire protection network.
Time Efficiency: Prefabricated components reduce on-site installation time by up to 50%.
High Strength & Ductility: Steel offers high tensile and compressive strength, absorbing dynamic loads and seismic vibrations far better than concrete.
Absolute Waterproofing: Welded joints or mechanical membrane seals eliminate leakage risks caused by structural cracks.
Easy Maintenance & Expansion: Modular design allows for seamless capacity expansion or component replacement.
To ensure safe, timely, and aesthetically pleasing installation, Chuan A Company executes four rigorous preparation steps:
Site & Foundation Survey: Verifying level elevations and flatness of the concrete foundation using total station instruments before positioning steel components.
Material Preparation: Utilizing high-grade SS400, Q235B, or SUS304/316 steel plates with complete CO/CQ certificates.
Equipment & Personnel Setup: Deploying TIG/MIG welding machines, mobile cranes, NDT testing equipment, alongside AWS-certified welders (3G/4G/6G).
The tank bottom endures the highest static load from vertical water pressure. Therefore, bottom panel assembly requires flawless execution.
Step 1: Axis Positioning & Base Support Beam Installation: Using electronic total stations to align main grid axes and installing H-beam/I-beam support grids to raise the tank bottom off the ground for leak inspection access.
Step 2: Bottom Plate Positioning: Transporting pre-cut plates to the site, arranging them with lap joints or butt joints, and clamping them with a $2-3\text{ mm}$ root gap.
Step 3: Bottom Plate Welding: Applying backstep welding and symmetrical welding sequences to eliminate thermal distortion.
Step 4: Vacuum Leak Testing: Utilizing vacuum box testing with soapy water solutions to detect micro-porosities along all bottom seams.
Tank walls resist hydrostatic pressure that increases with depth. Wall assembly demands absolute verticality and structural rigidity.
Step 1: Installing First-Course Wall Plates: Lifting first-tier wall panels with cranes, aligning them perpendicular to the bottom plate, and securing them with temporary supports ($\pm 2\text{ mm}$ vertical tolerance).
Step 2: Bottom-to-Wall Joint Welding: Applying double fillet welds both internally and externally at the bottom-wall junction, reinforced with steel gusset plates.
Step 3: Upper Tier Erection & Stiffening: Assembling subsequent wall tiers with full-penetration V-groove welds. Installing circumferential stiffener rings and internal/external bracing systems.
Step 4: Roof Structure & Accessories: Erecting roof trusses, roof covers, internal/external ladders, water level gauges, manholes, and fire pipe flanges.
Non-Destructive Testing (NDT): 100% of weld seams undergo Penetrant Testing (PT) or Vacuum Testing.
Surface Treatment & Anti-Corrosion Coating: Sandblasting to SA 2.5 standard, followed by an anti-rust Epoxy primer and multi-layer food-grade/water-resistant Epoxy topcoats ($200-300\text{ microns}$ total DFT).
Hydrostatic Testing: Stage-by-stage water filling ($25\% - 50\% - 75\% - 100\%$) over 48 to 72 hours to ensure zero leakage and structural integrity.
At Chuan A, we deliver not just construction products, but sustainable safety solutions:
Top-Tier Engineering Expertise: Experienced engineers compliance-trained in modern fire safety codes.
Precision Fabrication: Equipped with CNC Laser cutters and automatic welding machinery.
Rapid Execution: Streamlined installation protocols saving 20-30% project time.
Long-Term Warranty: Up to 10-year structural warranty with 24/7 technical support.
CHUAN'A CONSTRUCTION INVESTMENT JOINT STOCK COMPANY
