地下室防水层竣工后,为防止意外破坏,一般采用120mm砖砌围护墙做防护,这一作法存在的主要问题是:第一,防水层表面不是绝对平整的,回填土时,每平方米有2～3t的压力挤向保护层墙面,保护墙又将这些压力通过凹凸点挤向防水层,防水层抗穿能力远小于挤压力必然有局部被刺破; After the completion of the basement waterproof layer, in order to prevent accidental damage, 120 mm brick wall is generally used for protection. The main problems in this practice are: First, the surface of the waterproof layer is not absolutely flat. When there is backfill, there are 2 ~ 3t pressure squeezed into the wall of the protective layer, the protective wall and these pressure through the bump point squeezed into the waterproof layer, the waterproof layer wear resistance is much smaller than the squeeze force must be partially punctured;