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Spile and Injection Lance

Basic Concept

Spiles are used as temporary pre-support elements for the stabilization of the working area in tunnel headings. They are installed in the crown and sidewall area of a tunnel, to ensure the stability of the perimeter of the open span until the primary lining is installed. Injection lances are used for the targeted transport of a cement or resin based injection medium to the designated injection area.

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Description

In difficult ground and in case of unstable boreholes, DSI spiles and injection lances are a preferred solution to ensure a safe and fast installation procedure. Self-drilling spiles and injection lances allow the use of default Underground drilling machinery (jumbos); threaded hollow bars enable a durable and easy connection to any injection hose system.

1. Drill Bit
2. Optional Injection Hole
3. Coupling
4. Hollow Bar

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