A, muddy waterproof layer construction
According to the relevant regulations, the landfill must be impervious to prevent the pollution of groundwater and surface water, and at the same time prevent groundwater from entering the landfill area.
The core of the construction technology of muddy waterproof layer is the construction technology of mixed soil layer mixed with bentonite. Theoretically, the finer the soil particles, the proper water content, the higher the density and the better the anti-seepage performance. Bentonite is a clay rock with montmorillonite as the main mineral component. The higher the bentonite content, the better the impermeability. However, bentonite is an expensive mineral, and if the soil is over-screened, the investment cost will increase. Therefore, the feasible measures are: selecting soil source, testing soil composition, comparing soil samples with different doses through experiments, and optimizing the best mixture ratio; Do a good job of on-site mixing, strictly control the water content and ensure the degree of compaction;
(1) construction procedure
Generally speaking, the construction procedure of muddy waterproof layer
(2) Quality and technical control points
1. Qualification and performance of the construction team
2. Bentonite procurement quality
3. Determination of bentonite content
4. Mixing uniformity, water content and compactness
5. Quality inspection
Second, geosynthetics bentonite pad (GCL) construction
(a) geosynthetic bentonite mat (GCL)
(2) GCL construction process
GCL construction mainly includes laying GCL, controlling the lap width, and laying bentonite between two layers of GCL at the lap.
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