About the problem of plastic waterproof board for primary Engineer
The plastic plate shall be pressed against the plastic plate to leak water. The water can seep into the plastic board along the crevice of the cool plastic plate, and the soil layer is mixed to cause damage to the waterproof layer
Lower pressure refers to the upper part of the plastic plate and the lower part of the plastic plate overlap, the lower part of the outside, the upper part of the welding. This section of the standard is mainly aimed at the tunnel waterproof, the pressure here mainly refers to internal and external relations.
Department of plastic plate plastic plate press should press the plastic plate at the top, both sides mainly along the rock permeability Water Leakage plastic waterproof layer between the tunnel and the micro void flow to the side wall bottom drain hole into the tunnel drainage ditch drainage hole should be part of the plastic plate
Lap width should be understood simply overlap
