he top surface of the conical protrusion is bonded with a layer of filter geotextile to prevent the passage of soil particles, thereby avoiding blockage of the drainage channel and ensuring smooth drainage of the hole. The traditional drainage method uses bricks and tiles as the filter layer, uses more pebbles or crushed stones as the filter layer, and discharges water to designated locations. Replacing the pebble filter layer with a drainage board for drainage is time-saving, labor-saving, energy-saving, investment saving, and can also reduce the load on the building.

A good drainage system plays an important role in the construction cycle of civil engineering and the normal use and lifespan of structures. The drainage board and porous permeable pipe form an effective drainage system, and the cylindrical porous drainage board and geotextile also form a drainage system, forming a system with water seepage, storage, and drainage functions.

Greening engineering: garage roof greening, roof garden, vertical greening, sloping roof greening, football field, golf course.

Municipal engineering: airports, road embankments, subways, tunnels, and landfills.

Construction engineering: upper or lower layers of building foundations, indoor and outdoor walls and baseplates in the basement, as well as top plates, roof anti-seepage and insulation layers.

Hydraulic engineering: anti seepage of reservoirs, reservoirs, and artificial lakes.

Transportation engineering: highway, railway subgrade, embankment, and slope protection layer