1. Before laying the bentonite waterproof geotextile, the subgrade should be checked for compaction and leveling, ensuring it is free of holes, puddles, stones, tree roots, and other sharp objects.

2. During handling and construction, it is advisable to minimize vibration and impact for the bentonite waterproof mat, avoiding excessive bending and ensuring a one-time placement.

3. After the GCL installation and acceptance, it's crucial to promptly carry out the backfilling work. For projects using HDPE geomembrane, the geomembrane should be laid and焊接 immediately to prevent it from getting wet or damaged by rain.

The waterproofing mechanism is as follows: the sodium-based bentonite particles used in the waterproofing geotextile can expand more than 24 times when in contact with water, forming a colloidal system with high viscosity and low filtrate loss. Under the restriction of two layers of geotextile, the bentonite expands from disordered to ordered, resulting in a continuous water absorption and expansion. This process allows the bentonite layer to become compact, thereby providing waterproofing properties.