| 摘要 |
The method involves forming a concrete/mortar layer (18) on a level of installation height between a top face of a pit filling (17) and an installation pipe (16). An installation cable is connected with a side wall of a cartridge i.e. double walled steel cartridge. A tubular casing is upwardly arranged on the installation pipe out of a cavity (10), where the cavity is filled with a compactable material e.g. soil and ballast, to a hall floor level. A workshop or hall floor forming concrete layer is established at an upper edge (14) of the cartridge. |
