Container House Connection Standard
The connection standards for container houses mainly involve aspects such as structural stability, connection methods, node treatment, and acceptance specifications, as detailed below:
Structural Stability and Connection Strength
The core safety indicator for container houses is structural stability, which must comply with standards such as the 'Code for Seismic Design of Buildings' (GB50011-2010). The connection design must ensure overall integrity under extreme conditions (e.g., strong winds, earthquakes). For example, fully steel structural frames achieve high-strength connections through welding processes, with weld strength required to meet the GB/T 19001-2016 standard; semi-welded and semi-bolted connection structures require regular inspection of bolt tightness to prevent loosening after long-term use.
Connection Methods and Node Construction
- Welding Connection: Main beams and columns are typically welded using section steel to form a rigid framework. For example, 5×10 channel steel is used to weld the main crossbeams around the top and bottom of the container, with column thickness not less than 1mm, requiring shaping by professional equipment or selection of finished components. The welding process must be full and free of cold welds to ensure node bearing capacity.
- Bolted Connection: The connection between corner posts and the roof and ground frames often uses bolts for easy disassembly and reuse. For example, corner posts made of 3mm thick cold-rolled steel are fixed to the frame with bolts, requiring anti-loosening measures (e.g., spring washers) to enhance stability.
- Modular Combination Connection: Multi-story or row-connected container houses require specialized connectors (e.g., corner fittings, connection plates) to achieve horizontal and vertical connections between containers. Connection nodes need reinforcement, such as adding reinforcing plates at openings in the container walls to avoid local stress concentration.
Waterproofing and Corrosion Protection
Connection nodes are weak points for waterproofing and must be sealed using sealants, rubber gaskets, or welding to prevent leakage. For example, roof panels are connected using 360° bite joints and embedded into the short-side top frame; drainage channels are set around exterior wall doors and windows to ensure smooth drainage. Additionally, all steel components must be galvanized or coated with anti-corrosion paint to extend their service life.
Acceptance Specifications and Quality Control
Connection construction must comply with the 'Acceptance Standards for Construction Quality of Container Houses', including material quality acceptance, factory production quality acceptance, and on-site installation acceptance. For example, welded nodes must undergo non-destructive testing (e.g., ultrasonic flaw detection) to confirm weld quality; bolted connections must be checked for torque values to meet design requirements; overall installation deviations must be controlled within allowable limits (e.g., verticality deviation ≤ H/1000).
