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Chapter 6: Water Main Installation and Rehabilitation

Horizontales
A force resulting from water under pressure and in motion.
A method to protect workers against cave-ins by installing tightly spaced upright planks against each other to form a solid barrier against the faces of excavation.
A framework of wood and/or metal constructed against the walls of a trench to prevent cave-in on the earth walls.
a method to protect workers against cave-ins using a steel box open at the top, bottom, and ends.
Verticales
this procedure involves excavating the walls of the trench at an angle.
Today most connections of new mains to existing mains are made with this type of tap.
The process of compacting backfill beneath the pipe curvature.