【Haichuan Chemical Construction Technology】Construction Process for Plastic Drainage Boards in Subgrades

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【Haichuan Chemical Construction Technology】Construction techniques for plastic drainage boards in subgrades – materials for first-class construction projects. Plastic drainage boards consist of a plastic core surrounded by an geotextile drainage layer with excellent drainage properties; they are typically inserted into soft soil layers using insertion machines to create a vertical drainage system. A sand cushion is placed on top of the plastic drainage boards to serve as a horizontal drainage channel. When load is applied to the surface of the foundation, the pore water in the soil rises along the grooves in the plastic drainage boards and overflows to the surface, thereby accelerating the settlement process of the soft foundation and enabling its compaction and strengthening. Plastic drainage boards are suitable for the reinforcement of weak, saturated cohesive soil foundations with high water content, high compressibility, poor permeability, and low strength.