The selection of anti-seepage materials, anti-seepage membrane is an important material for artificial lake anti-seepage, so first of all, it is necessary to choose a geomembrane of suitable quality, and also consider the convenience of construction. The selection of geomembrane should pay attention to the following points:
During the painting process, welding, especially cross welding, should be minimized to reduce potential leakage.
In addition, the water depth of the artificial lake is mostly 5 meters, so it is necessary to ensure that the strength of the geomembrane is sufficient, and the foundation of the artificial lake is very important, once the foundation is deformed to a large extent, the geomembrane will bear various loads.
Construction steps:
1. According to the drawings, excavate the shape of the lake, including the depth of the lake and the surrounding slope; level the lake bottom and ram the foundation soil to form the lake; the surrounding facade adopts a 180 or 240 mm thick earth wall, and the wall is covered with an anti-seepage membrane; Do drainage blind ditch and catch well, well overflow;
2. The bottom surface is covered with a large area of 150-200 thick gravel layer. The function of the gravel layer is to divert the groundwater and prevent the groundwater from lifting the impermeable layer when the lake is drained. Stone powder layer or medium-coarse sand layer 80mm thick leveling base;
3. Lay 100 grams of non-woven fabric as an isolation layer; lay a 1mm impermeable membrane; lay 100 grams of non-woven fabric as an isolation layer; pave a 100 mm thick cement stone powder mixed layer, and then lay a leveling layer of 30 mm thick mortar, and the leveling layer is matched with 3*3m partition wall joints (or 60-thick red brick layer is laid on 60-thick stone powder layer, 25-thick mortar leveling layer); the surrounding façade adopts 180mm thick brick inner wall, which is the protective wall of the anti-seepage membrane of the outer façade;
Most of the geomembranes are used in tunnel engineering, if there are channels, then drainage can be achieved. The impermeable membrane is not the main reason for the collapse of the project. The key to our concern is the change of soil quality caused by water in the geomembrane, and the key to our concern is the change of soil quality caused by water.
In many areas, summer temperatures are high and water evaporation is high. Geomembranes have also taken many steps to address water scarcity in arid regions, which are very water-scarce. Geomembrane is a material with good impermeability and can be used in arid areas. This property is also widely used in afforestation activities in water-scarce regions.
At the same time, the corrosion resistance is increased in product performance, and its corrosion resistance is very strong. Can guarantee the service life. This product is very useful in these very water-deficient areas.
Post time: Sep-20-2022