The importance of sandwich boards in the construction of prefabricated buildings
As a new type of building mode, prefabricated buildings have been widely concerned and applied for their characteristics of speed, environmental protection, and energy savings. As a common wall material in prefabricated buildings, sandwich board has the advantages of heat insulation, sound insulation, and fire prevention, so the installation and connection methods in the construction process are particularly important.
The sandwich panel before the installation of the preparatory work
1. Clean the base: Before installing the sandwich panel, it is necessary to clean the base first to ensure that the base is smooth and solid and to remove debris and dust to provide good installation conditions.
2. Base treatment: Select the appropriate base treatment according to the actual situation, such as brush primer, grinding, etc., to increase the base adhesion and surface smoothness.
The installation method of the sandwich plate is discussed.
1. Flat paste method: Stick the sandwich board horizontally on the treated base and use special glue or screws to fix it. This installation method is suitable for small-area sandwich plate installation because it is simple and convenient, but it is necessary to ensure that the bonding surface between the sandwich plate and the base is fully contact and firm.
2. Vertical mounting method: the sandwich plate is fixed vertically on the column, usually fixed by screws or nails. This method is suitable for large-area sandwich plate installation and can effectively improve construction efficiency and connection strength.
3. Hanging method: Install the sandwich plate through the hanging system. This method is suitable for high-rise buildings and places with large spans and has better performance in terms of safety and construction efficiency.
The connection method of the sandwich plate is discussed.
Screw connection: Tightly connect the sandwich plate to other components through reserved holes using screws. This is a common connection mode that is simple and easy to use and has good reliability.
Hook and groove connection: U-shaped grooves are arranged on both sides of the sandwich plate and are connected by biting the grooves with other components. This method is suitable for places that require frequent disassembly and combination, such as exhibition venues.
Welding connection: For some places with high special needs and requirements, welding methods can be used to connect the sandwich plate. By melting the edge of the sandwich plate, it is fused with other components to achieve a strong connection. 1. Sandwich plate deflection: In the construction process, there may be inaccurate installation of the sandwich plate. The problem can be solved by means of adjustment tools or disassembly and re-installation, and inspected and re-removed in strict accordance with the design requirements.
Sandwich board surface pollution: During the installation process, due to improper operation or environmental factors, the surface of the sandwich board may be polluted. A cleaning agent can be used to wipe or sand the treatment to solve this problem.
Cold bridge problem: When there is a certain gap at the sandwich plate connection, it may cause a cold bridge phenomenon, resulting in energy loss and structural problems. Filling materials can be selected to fill gaps, improve adiabatic properties, and increase structural stability.
Case analysis of demonstration projects
Taking a prefabricated building project as an example, the advanced sandwich plate instal
