Pipejacking Advantages & Disadvantages Ground and Water Table Conditions The method can successfully deal with most types of grounds, from hard rock to unstable silts and sands with a high water table. But the most troublesome ground conditions are clays with large boulders.

Pipejacking Advantages & Disadvantages Damage to Property and Existing Utilities The method is one of the safest and least disturbing techniques of underground construction. No significant overcut nor significant ground movement during the construction stage with this method. Existing foundations and services could be passed within few millimeters without any measurable movement.

Pipejacking Advantages & Disadvantages Disruption to Public and the Environment The method offers the pipe laying to pass under all busy streets thus avoiding traffic delays, loss of business and general disruptions which proves to be the most environmental friendly in environmentally sensitive areas

Pipejacking Advantages & Disadvantages Safe Working for Operatives and Public Safety Pipejacking demands less in the way of experience and traditional skills but more in technical competence. During the advancement of the open shield, the workers are all protected from cave-ins. Public safety is greater as the impact and area of construction works are reduced.

Pipejacking Advantages & Disadvantages Accuracies and Drive Spans Plus or minus 35 mm on the vertical and horizontal axis Up to 500 m for DN 1500 mm ~ 350 m for DN 1200 mm It is not possible to make a rapid change of line or level or introduce a bend into the line. However, radii of the pipejacking alignment exceeding 100 m have been done with in recent applications.