1. The board surface is uneven, not vertical, the width of the joints is narrow, and the height is inconsistent
1.Causes: the horizontal and vertical deviation of the skeleton, the uneven façade, the installation of the plate surface is out of tolerance, and the eyelets are misaligned;
2. Prevention and control measures:
(1) Starting from the installation of embedded parts and expansion bolts, it must be operated carefully. When the skeleton is installed, the line is pulled horizontally and vertically, and the plane should be flat, and then the theodolite is checked to carry out the process acceptance;
(2) Plate and skeleton positioning, drilling must be accurate;
(3) When the board is installed, it must not be arbitrary, and it must be installed according to the scheme and the position of the elastic line. Before installation, the size and shape of the plate should be checked, and the installation can be carried out only after the inspection is correct.
2. The seam is not tightly sealed, uneven, and there are bubbles and water seepage
1. Reason:
(1) At the end of caulking, polyethylene foam is used to plug the back of the board surface, and a certain pressure is formed at the end when the sealant is poured with a caulking gun, so that the bond with the plate joint is not firm and the sealing is not tight;
(2) The operator is not proficient in operation, the distance between the muzzle and the caulking place is inconsistent, and the pressure is uneven, resulting in uneven thickness, many joints, and bringing in air, resulting in uneven surface of the sealant, bubbles and water seepage;
(3) Material problems: There are problems with the quality of silicone sealants.
2. Prevention and control measures:
(1) The selection of materials should be good, and the performance of the tool should be good;
(2) Carefully stuff the sealing filler, the distance between the filling surface and the plate surface is consistent, and the depth of the embedded sealant is consistent, so that the seam is dense and the seam surface is straight;
(3) The operator is skilled, stabilize the caulking gun, keep the speed even, the distance is consistent, remove the air with the embedding, puncture it once the bubble appears, and flatten it with a trowel to remove the air.
3. The closing treatment is not firm, smooth and sealed
1. Reason: The construction is not meticulous and the method is improper.
2. Prevention and control measures:
(1) Do a good job of closing the plan before construction, and adopt a reasonable closing plan for different structures and conditions
(2) Strict operation during installation and mastery of the essentials.
4. The surface is polluted and has dents
1. Reason:
(1) The protective film is dismantled too early, and the measures to protect the finished product are improper;
(2) During the construction of the next process, the finished product is not properly protected and caused by hitting the board surface.
2. Prevention and control measures:
(1) Don't remove the protective film too early, and it is better to remove it when dismantling the scaffolding;
(2) Work out feasible protection measures for finished products;
(3) Clean up and scrub the polluted places in time.
