Rehabilitation and Maintenance of Drains and Sewers / Prof. Dr.-Ing. D. Stein, Dipl.-Ing. R. Stein (2004)

Methods of Construction

The laying of sewers can be carried out either by means of the open cut or the trenchless methods of construction.

Depending on the construction methods used, there are differing conditions especially in the construction site in the immediate surroundings of the sewer, which can decisively influence the type of damage (Abschnitt 2.1) as well as the selection of the method of rehabilitation. This is especially so, for instance, with injection process (Abschnitt 5.2.2) and the process of the pipe replacement (Abschnitt 5.4) in which the soil is directly or indirectly involved in the method.

The construction site factors of influence in this connection, of which more will be mentioned later, are, among others:

  • Type of soil;
  • Layer density;
  • Layer borders and strength.

Rehabilitation and Maintenance of Drains and Sewers / Prof. Dr.-Ing. D. Stein, Dipl.-Ing. R. Stein (2004)