When the web of support steel frame beam and column is damaged, forming network, bifurcation crack area or local fracture, overburning or burn through, and even large-area holes and other defects, panel repair should be adopted

1. 检查确定缺陷的范围;

1. Check and determine the scope of defects;

2. 若剔除缺陷，应将其切割成圆角矩形孔，剔除零件的尺寸应比缺陷范围的尺寸大100mm;

2. If defects are removed, they shall be cut into rounded rectangular holes, and the size of the removed parts shall be 100mm larger than the size of the defect range;

3.将厚度和材料相同的面板插入切割部分，在嵌入面板的长边和宽边与切割孔的两侧之间留出2 ~ 4mm的间隙，并将边缘加工成接合所需的槽;

3. Insert the panel with the same thickness and material into the cutting part, leave a gap of 2 ~ 4mm between the long and wide sides of the embedded panel and both sides of the cutting hole, and process the edge into a groove required for joint;

4. 面板定位后，将孔板四角预热100 ~ 150℃，采用分段分层反焊法焊接;

4. After the panel is positioned, preheat the four corners of the orifice plate to 100 ~ 150 ℃, and weld with sectional and layered reverse welding method;

5. 检查焊缝质量，打磨焊缝补强，使其与原构件表面齐平;

5. Check the weld quality and polish the weld reinforcement to make it flush with the surface of the original component;

当使用附加盖板修补裂缝或块状缺陷时，一般采用双盖板。此时，有必要在裂纹的两端钻一个裂纹止裂孔，所有的大量缺陷。盖板焊接连接时，应将加固后的盖板按原板厚度压紧。焊腿的尺寸等于板的厚度。济南遮阳棚的尺寸和焊接顺序可参考面板的要求。

When additional cover plates are used to repair cracks or blocky defects, double cover plates are generally used. At this time, it is necessary to drill a crack stop hole at both ends of the crack to remove all a large number of defects. When the cover plate is welded and connected, the reinforced cover plate shall be pressed according to the thickness of the original plate. The size of the welding leg is equal to the thickness of the plate. The size and welding sequence of Jinan sunshade can refer to the requirements of the panel.