手孔井的内围尺寸要求为500（长）×500（宽）×600（深）MM，用砾石铺层作为渗水用；手孔井四壁必须抹水泥沙浆。

Hand hole hole of the inner size for 500 (length) x 500 (width) x 600 (deep) MM, with gravel layer for water penetration;Hand hole walls must be well cement mortar.