The prefabricated components of this project include prefabricated outer infill walls, prefabricated inner infill walls, and prefabricated stairs. The detailed list and layout plan of prefabricated components for standard floors are shown below:.

The standard floor structure of each main building is the same. The proposed external wall hoisting sequence starts from YWQ6 on the west side of the main building and is carried out in a clockwise direction. The corresponding grouting sealing, cast-in-place wall column reinforcement engineering, and formwork engineering are carried out in this order..

The prefabricated inner wall is lifted from YNQ6 on the west side of the main building and lifted clockwise in sequence..

1. Grassroots treatment: The joint surface of the installed wall panel should be cleaned thoroughly, and the base surface should be dry..

2. Measurement and layout: Based on the positioning axis, snap control lines on the concrete top plate of the working layer to facilitate the installation of the wall in place, including: wall and hole edge lines; Horizontal position control line of 500mm (300mm) on the wall; 500mm elevation control line for the homework layer (on the concrete floor slab reinforcement); Center position line of the sleeve..

3. Correction of exposed connecting steel bars: Use self-made steel bar clamps to recheck the verticality, positioning, and height of the steel bars, and correct the steel bars that do not meet the requirements to ensure that the sleeves on the upper prefabricated exterior wall can smoothly align with the reserved steel bars on the next layer..

Set up two signal workers during lifting, one at the lifting point and one on the lifting floor. During the external wall hoisting, one hanging personnel shall be assigned, and three personnel shall be assigned to place and fix the external wall on each floor..

Before lifting, the quality responsible person shall verify the model and size of the wall panel. After checking the quality for accuracy, a dedicated person shall be responsible for hanging. When the hanging personnel evacuate to a safe area, the signal worker below shall confirm the safety situation around the component. After confirming accuracy, a trial lifting shall be carried out, and the lifting shall be carried out slowly. When the lifting reaches a distance of about 0.5m from the ground, the tower crane lifting device shall be confirmed to be safe before continuing to lift..

Socket Data Clip

When the wall is lowered to a distance of 0.5m from the floor, fine tune according to the pre positioned guide frame and control line. After the fine tune is completed, slow down the lowering. Two professional operators guide the descent with their hands, and when it reaches 100mm, one worker uses a dedicated visual mirror to observe whether the connecting steel bars are aligned with the holes. (On the working face, the lifting personnel should adjust the position of the components in advance according to the positioning line and elevation control line, as well as the position of the embedded steel bars. They should prepare the pad iron, position the components within the control line, and place the pad iron.).

After the wall stops falling, a dedicated person will install diagonal braces and a seven character code to fix and adjust the prefabricated wall, ensuring the verticality of the wall installation. After the adjustment of the components is completed and the positioning and elevation of the components are verified to be correct, a dedicated person is responsible for removing the hook. Before the diagonal support is finally fixed, the hook cannot be removed. (Nuts need to be embedded on the prefabricated wall for diagonal support fixation) After the diagonal support fixation is completed, a seven character code is installed at the bottom of the wall to strengthen the connection between the wall and the main structure, ensuring that the wall does not move during subsequent operations. Install two adjustable diagonal supports and two seven character codes on each wall..

Two slant support can also be used for fixing, and slant support can be used instead of seven character code..

The verticality of the wall is verified by a ruler, the elevation of the wall is verified by a level, and the calibration of prefabricated wall panels includes plane positioning, verticality, and elevation. The specific measures are as follows:.

1. Horizontal position correction measures for parallel wall panels: The wall panel position is corrected by popping the boundary line of the wall panel on the floor surface, and the wall panel is positioned according to the boundary line. If the horizontal position.