Precautions for Laying of Composite Geomembrane Channel
The composite geomembrane is composed of short fiber geotextile or filament geotextile and HDPE geomembrane. The composite geomembrane is divided into two cloths one film and one cloth one film, the width is 1-6m, and the weight is 200-1500g/m2, The composite geomembrane is aligned horizontally and has the good anti-seepage performance.
The composite geomembrane can be used in unconventional temperature environments because it uses polymer materials and anti-aging agents are added during the production process. It is often used in the anti-seepage treatment of dams, drainage ditches, and river channels and the anti-fouling treatment of waste yards.
The composite geomembrane has high physical and mechanical properties, such as tear resistance, tensile strength, and rupture. The composite geomembrane has high strength, good elongation, aging resistance, acid and alkali resistance, corrosion resistance, and good impermeability. Performance, composite geomembrane can meet the requirements of civil engineerings, such as construction, water conservancy, municipal, subway, transportation, tunnel, and engineering construction seepage prevention, reinforcement, isolation, crack prevention, and reinforcement.
The river slope is made of composite geomembrane with anti-seepage and cast-in-place concrete lining structure. The composite geomembrane uses two kinds of fabrics (PE film) with a thickness of 0.5mm. The composite geomembrane welding overlap length is greater than 10cm. During the construction process, the supervisors promptly checked the leveling and welding process of the geomembrane base, especially the quality control of the welding process. In the beginning, due to the unskilled and difficult operation of the workers, the welding pass rate was low and the rework rate was high. Through construction and supervision, we strive to find out the reasons and accumulate experience, quickly mastered the construction points and operation skills and greatly improved the construction quality of the process.
During the construction process, the person in charge strictly controls the thickness of the incoming soil and the thickness of each layer of filler, removes soil materials containing impurities, such as bricks and stones, and determines the dryness of the soil material after testing, the thickness of each layer of paving and The number of mechanical compactions, they are built according to a predetermined construction plan, each layer is filled with soil, after the pressure is completed, a sample test should be performed according to the specifications, the construction unit should conduct a self-inspection, and the inspection unit should verify the sampling test, and Strictly control the design indicators of river bottom backfill with a degree of compaction greater than 0.92.
According to the design requirements, after removing the bottom sludge, backfill 1m thick cohesive soil as an anti-seepage layer. The river slope is made of composite geomembrane and cast-in-place concrete lining structure for composite anti-seepage.