详细内容：
As the main base layer of the lake bottom is composed of pebbles, sodium-based bentonite waterproof blankets are used for seepage prevention. To ensure the normal performance of the waterproof blanket, lay 30cm and 50cm thick layers of clear soil on the top and bottom of the waterproof blanket respectively, and compact them thoroughly. The waterproof blanket is made of GCL-NP needle-punched sodium bentonite waterproof blanket, which is a carpet-like anti-seepage material formed by needle-punching high-expansion sodium bentonite between plastic flat filament woven geotextile and non-woven geotextile. The unit area mass of the waterproof blanket is 50,000 g/㎡, and the permeability coefficient is ≥5.0×10 ⁻ ·s. Sodium-based bentonite waterproof blanket not only possesses the basic characteristics of conventional geotechnical materials, but also has excellent anti-seepage performance. Moreover, sodium-based bentonite does not affect the root growth of aquatic plants, has a small impact on the water ecological environment, and is environmentally friendly and green. Bentonite waterproof blankets have played a good role in creating ecological landscape lake water bodies
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The construction process of the cement mixing pile anti-seepage wall scheme is reliable, with good anti-seepage durability and little impact on the ecological environment of the lake area. However, the construction workload is large, the difficulty is high, and the construction period is long. After being buried underground, the quality defects of the anti-seepage wall are difficult to repair, and the comprehensive investment is the highest. ② The composite geomembrane anti-seepage scheme has the lowest comprehensive cost and better anti-seepage durability. However, the quality of anti-seepage construction is difficult to control. After laying, it completely blocks the regional hydraulic connection and is an unfriendly anti-seepage material. ③ The sodium-based bentonite waterproof blanket anti-seepage scheme has strong adaptability to the foundation, and the natural inorganic minerals are close to the natural ecological environment, with strong anti-seepage durability. If the waterproof blanket is damaged by the root systems of aquatic plants, its repairability is also very strong, which is convenient for repairing local damage. Through comparative arguments in terms of technical reliability, engineering construction conditions, operation and maintenance, and investment, the anti-seepage scheme of natural sodium-based bentonite waterproof blanket is determined to meet the requirements of lake engineering landscape water level and ecological environment protection. Sodium-based bentonite waterproof blanket, as a new type of anti-seepage material that is environmentally friendly, economical, durable and has excellent anti-seepage performance in artificial lake anti-seepage projects, has achieved good anti-seepage effects and ecological economic benefits when applied in ecological landscape lake anti-seepage projects.