How to lap geomembrane construction? Take you to understand the whole process of geomembrane hot melt welding.
The geomembrane should be welded in time after the construction is carried out, and the machine used in welding is called the double-track hot melt welding machine, and the welding process is: adjusting the pressure, setting the temperature, setting the speed, the weld lap inspection, the film loading machine, starting the motor pressure welding.
Before formal welding, a 10 m×0.3m of the sample. When the specimen is welded, the lap width is not less than 10cm, and the peeling and shearing test is carried out on site with a tensile machine, and after the sample is qualified, it is good to use the adjusted speed, pressure and temperature at that time for formal welding, and the date, time and ambient temperature are indicated on the sample.
Before welding, the sand and soil on the membrane surface must be removed, the membrane surface must be cleaned, and the membrane and membrane joints must be laid flat before welding.
How to lap geomembrane construction? Take you to understand the whole process of geomembrane hot melt welding.
The adjacent geomembrane welds should be staggered as far as possible, and the nodes formed between the membrane blocks should be T-shaped, not cross-shaped, and the intersection of the longitudinal and horizontal welds should be strengthened by an extrusion welding machine. When the length of the membrane is insufficient, longitudinal splicing is required, and the transverse weld should be welded first, and then the longitudinal seam should be welded.
During the welding construction, 3 people and 4 people are required to cooperate, 1 person holds the machine, 1 person cleans the surface to be welded, 1 person holds the power supply and observes the quality of the weld at the same time, marks the problem, and 1 person repairs it in the back.
T-shaped seam treatment: weld the transverse seam first and then weld the longitudinal seam, and the longitudinal seam should be removed first when the longitudinal seam is welded, and then welded here with a thermal welding machine. In addition, the base material should be used to fill the scar for the T-joint, and the size of the scar can be 300mm and 300mm. The right angle of the scar should be rounded.
For special nodes and local breakages, squeeze welding machines are used for scar repair and welding.