I don't know what kind of close friend you are. If the inner membrane is made of wood or iron, the top should be pressed with a crossbar and a fulcrum. At present, the inner membrane of 20-meter precast beam and slab mostly adopts capsule inner membrane, which is easy to float. The following methods can be used for fixing:

1. Punch holes in the middle of the template, pass through the No.8 iron wire from the top of the capsule inner membrane, and pass through another template for fixation. After removing the template, handle the wire head. The spacing is1-1.5m. ..

2. Make a U-shaped rib and fix it on the bottom steel strand (pretensioning method) or the bottom steel bar, and add a pad between the U-shaped rib and the inner membrane. After this method is removed, the top of the intima is easily exposed.

3. Fix a pressure bar on the upper part of the formwork, weld more than 25 steel bars downward on the pressure bar, add a cushion block to resist the capsule (be careful not to puncture the capsule), fix the pressure bar on the formwork, and evacuate the pressure bar after vibrating, with the spacing of1-1.5m. ..

The above methods have their own advantages and disadvantages. Methods 1 and 3 are safer, but method 1 has an impact on the appearance of the side panel.

Method 3 the fixation should be firm, and the part in contact with the capsule is easy to puncture the capsule.

Method 2 is ideal, and the actual construction is difficult to control.

It should be noted that the air pressure of the capsule should be recommended by the manufacturer, and it is not easy to be too small or too big. The timing of deflation should be well grasped, the couch top should be early, and the bag should be attached late.

I hope it helps you.