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.
In difficult ground and in case of unstable boreholes, DYWI® Drill 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