Container House Quality Accidents
Container house quality accidents mainly involve issues such as insufficient structural stability, installation defects, and improper use and maintenance. Typical cases include overturning in extreme weather, pipeline leakage, and collapse caused by inferior materials, necessitating strengthened control across multiple aspects including design, construction, materials, and management.
I. Accidents Caused by Insufficient Structural Stability
In the crane overturning accident at the Dongjiangkou Prefabricated Component Factory in Dongguan, the residential container modular house, located within the impact range of the overturned crane, was crushed by the collapsed crane, resulting in 18 deaths. The direct causes of the accident included the crane's rail clamps not being in operation, leading to movement and overturning under wind forces during severe convective weather. This highlights the importance of site selection and surrounding environmental safety assessments for container houses. If they are not positioned away from tall equipment or potential hazards, chain accidents can easily occur under extreme conditions. Additionally, some unbranded non-standard products use ordinary steel with a thickness of ≤1.2mm without galvanized anti-corrosion treatment, exhibiting frame shaking and wall deformation during simulated 6-level wind tests, posing a high risk of collapse in actual use, with rework costs reaching 3-5 times the purchase cost.
II. Hazards Caused by Installation Defects and Inferior Materials
The container accommodation facilities at the Nagoya Asian Games in Japan experienced bathroom pipeline spraying and floor water accumulation issues due to pipeline design or installation defects, affecting usage safety. Some low-priced container houses in China use inferior thin steel, non-standard thermal insulation cotton, and old hardware fittings, resulting in poor thermal insulation performance. They are stuffy in summer and drafty in winter, and are prone to wall leakage, frame deformation, and panel damage during heavy rain and strong winds. Such products not only offer a poor living experience but also pose safety hazards such as electric leakage and substandard fire protection, with a service life of only 2-3 years, increasing secondary investment costs for the project.
III. Increased Risks Due to Lack of Use, Maintenance, and Management
Some project parties, aiming to cut costs, choose container houses from unqualified small workshops. Their fixed welding processes make it impossible to completely disassemble the houses after project completion, resulting in a component breakage rate of over 50% during relocation, leaving them only suitable for scrap disposal and increasing overall costs. Furthermore, if the dismantling of temporary facilities after retirement relies solely on scattered construction teams, accidents can easily occur due to misjudgment of load-bearing capacity or improper handling of residual value. For example, Qingdao Xinwanda Container Technology Co., Ltd. emphasizes the need for professional manufacturers to assess old structures, ensure safe dismantling, and coordinate with the customization of new containers to control losses and ensure rapid site handover.
