Slime Shield

Earth pressure balance shield with soil conditioning additives to facilitate the excavation of the ground.

Slipline

A rehabilitation technique covering the insertion of one pipe inside an existing pipe.

Sliplining

(1) General term used to describe methods of lining with continuous pipes and lining with discrete pipes. (2) Insertion of a new pipe by pulling or pushing it into the existing pipe and grouting the annular space. The pipe used may be continuous or a string of discrete pipes. This latter is also referred to as Segmental Sliplining.

Slurry

A mixture of drilling fluid and spoils.

Slurry Chamber

A chamber in which excavated material is mixed with slurry for transport through the discharge line to the separation plant at the surface. The slurry chamber is located behind the cutter wheel of a slurry microtunneling machine.