CONCRETE PIPE Jacking Pipe Installation Procedure A typical installation and general procedures for jacking concrete pipe are illustrated on the opposite page. The usual construction sequence for tunneling and jacking concrete pipe is: • Excavate jacking pits or shafts, construct jacking abutments or thrust blocks, and install jacks, jacking frame and guide rails. • Begin tunnel excavation by machine, or hand, depending on conditions. • Lower first section of pipe, position jacks and jacking frame, and jack pipe forward. • Continue excavation, remove soil through pipe, insert succeeding sections of pipe between the lead pipe and jacks and jack forward. • Repeat sequence, excavation, soil removal, pipe insertion and jacking, until the operation is complete. PAGE 42 LAFARGE PIPE eMANUAL