Wall Demolition in Prefabricated Slab Structure Houses
Wall demolition in prefabricated slab structure houses requires careful handling based on the type and structure of the walls. Random demolition is not allowed, as it may compromise the structural safety of the house.
Demolishable Walls
If the walls are composed of prefabricated concrete lightweight insulation panels, square steel studs, reinforced concrete components, etc., these walls typically have characteristics such as light weight and high strength and can usually be demolished. However, a static load test must be conducted before demolition to determine whether their bearing capacity meets the structural requirements after demolition. At the same time, safety measures such as wall reinforcement and covering with protective nets should be taken to prevent collapse or falling objects during the demolition process. For example, when demolishing lightweight insulation panel walls, temporary supports can be used to fix the surrounding structures first, then the target walls can be gradually demolished, ensuring that the demolished area has sufficient support.
Non-demolishable Walls
For prefabricated slab houses with brick-and-concrete structures, if the walls bear part of the house's weight (such as lightweight walls under beams), they must not be demolished or have doors or windows opened. These walls are an important part of the house's structure, and their removal will disrupt the overall force balance of the house, leading to structural safety hazards. Especially for brick-and-concrete prefabricated slab houses built 30 years ago, the prefabricated slabs are usually only placed on two load-bearing brick walls, which are the main load-bearing structures of the house and must not be randomly modified or demolished. If forced demolition is carried out, it can easily lead to uneven wall stress, resulting in cracks or even collapse, seriously threatening living safety.
Historical Issues and Alternative Solutions
Early cement prefabricated slab walls have been banned due to issues such as poor thermal insulation performance and insufficient structural stability. These walls are prone to cracking and water seepage during long-term use and have poor seismic performance, failing to meet the safety requirements of modern buildings. Currently, cast-in-place slabs have generally replaced cement prefabricated slab walls. Cast-in-place slabs use an integral pouring process and are more tightly connected to the surrounding structures, providing better bearing capacity and seismic performance, effectively enhancing the safety and durability of the house. If you need to renovate a prefabricated slab structure house, it is recommended to prioritize the use of cast-in-place slabs or other materials that meet modern building standards and consult a professional structural engineer to ensure that the renovation plan complies with safety regulations.
