The joint of unit curtain wall is inserted by two adjacent members when they are installed on the main structure, so it is significantly different from unit curtain wall in structure and connection treatment.
To install the connector of the unit curtain wall on the main structure, it is necessary to install all 1 installation units (full height or 8- 10 floors) for 1 time. The installation quality of unit curtain wall is guaranteed by the installation accuracy of connectors, that is, the flatness of the outer surface of unit curtain wall is guaranteed by the installation accuracy of connectors and the structural thickness of unit components of unit curtain wall.
The panels (glass, aluminum plate and granite plate) of the unit members of the unit curtain wall have been assembled in the factory, and their connection with the main structure is only operated indoors, so there must be operating space inside. In this way, for a building where the floor is flush with the outside of the column (or the floor or solid wall protrudes from the outside of the column), it is very difficult to install the unit members outside the column (solid wall) at the connection point of the main structure. When the frame on the building facade must be at the column position, measures should be taken in the design to set connection points on the floor outside the main width to avoid the column position.
The connection point is arranged outside the column (solid wall). In order to adjust all the three-dimensional accuracy of all the connectors of 1 installation unit (full height or 8- 10 floor) to 1 time, it is necessary to use multiple hanging baskets (for example, it is sometimes necessary to install adjustment connectors on three solid walls, and each floor is equipped with 3-5 hanging baskets) for safety adjustment. At this point, you need to install. Moreover, because there is no operating space inside the assembly, the connectors are required to achieve the required position accuracy in all three directions, and the matching between connectors on the unit assembly must be completely consistent before they can be in place at one time (which is difficult to do). If the assembly tolerance deviation between the connector on the main structure and the connector on the unit assembly is slightly large, it will not be installed smoothly.
The connector installed on the main structure should not only ensure the installation accuracy of unit assembly, but also have certain adjustment possibility in the process of hoisting and fixing, that is to say, the connector should have three-dimensional six degrees of freedom (three-dimensional movement and three-dimensional rotation angle). It is implemented in two stages, namely, the adjustment when the connector is installed on the main structure and the fine adjustment in the hoisting process. In order to ensure the smoothness of the external surface of the unit curtain wall, when installing the connector on the main structure, the Z direction should be completely in place at one time, that is, after the connector is installed and fixed, there can be no displacement and rotation angle in the Z direction, and X and Y should be initially adjusted in place, while when designing the connector (the connecting component on the unit assembly), it should be slightly adjusted in the X and Y directions during installation, so as to smoothly implement the lifting in place.
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