Boat rubber fender installations generally use manual operations. Before the installation of the boat fender on the ship, a hanging ladder or hanging basket is hung on the front of the wharf so that the worker can install and tighten the nut in the hanging basket.
1) Measurement positioning.
The construction personnel places the relevant dimension line of the positioning plate, and when performing the fender drilling, the size of the positioning plate to be processed should be fixed by using the expansion bolt.
2) Drilling.
Electric core drills, air compressors, glue injectors, special round brushes, greasy knives, and other necessary protective equipment, such as gloves and masks, are all necessary for drilling and anchoring.
According to the requirements of the project, drill rods with corresponding parameter specifications are selected. The drill rods must be used in a length that meets the design depth requirements of the drill holes. During the construction, the steel bars in the substrate must be avoided, the drilling positions should be marked, the drilling position should be correct, and the spacing between the holes should be correct. Hole spacing should be in accordance with the regulations and design requirements. The channels shall be dry, otherwise they shall be manually dried to ensure absolute dryness of the fender bolts and the concrete bonding surface before curing.
3) Clean the hole.
After the hole is formed, the dust in the hole must be removed with a air compressor and a special round brush to avoid the influence of dust on the adhesive surface. You can use air compressors to blow several times, then brush back and forth with the brush until there is no dust.
4) Clean the hole.
Acetone stained with a brush to clean the wall of the concrete tunnel, to ensure good adhesion of the substrate pore wall and the structural adhesive. After the acetone volatilizes, the paper stopper is timely plugged at the orifice to avoid contamination,stand-by.
5) Adjust the glue.
The test can be appropriately increased or decreased the amount of curing agent. Glue preparation should use precision measuring instruments, such as: balance scale and bench scale less than 5kg, weigh glue first, then weigh the curing agent. After mixing the two-component resin glue, it should be mixed evenly. The amount of one dose should not be too much, so as not to affect the bonding quality of the construction after the time is too long and the viscosity of the glue deteriorates. Generally, the structural glue to be prepared at one time should be all used up within 30 to 40 minutes.
6) Hole injection glue.
According to the difference of the application form of the anchoring glue (tube-mounted, mechanically-injected, on-site preparation as described above) and direction (upward, downward, horizontal), the corresponding injection method is adopted. The glue can be stuffed into the hole by viscose infusion or other methods. Be sure to fill the hole and remove the air, so that the volume of colloid is more than 80% of the volume of the hole.
7) Implant screw.
After the injection of the structural glue, the screw is immediately implanted, and the screw is properly rotated to facilitate the elimination of the air between the glue and the screw and to uniformly bind the colloid. Clean the excess structural adhesive on the orifice. Before the anchor material has not solidified, prepare a temporary bracket for the longer screw to prevent displacement. The finished screw should be cured with static curing, and the disturbance should be prohibited during curing.
Refer to the anchorage schedule for installation. After reaching the recommended curing time, bolts can be installed and tightened.
Remarks: When the substrate is wet, the loading and curing time should be extended accordingly (usually 2 times when the substrate is dry).
Rubber fender should have factory quality certificate and test data.
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