DOES “GROUND FLUSH” MEAN PLUG WELDED AND GROUND FLUSH OR DRY PACKED AND GROUND FLUSH?
Usual practice is to dry pack and grind flush, but the Engineer will make the proper determination in the field. IS THERE A MAXIMUM ALLOWABLE GROUT LIFT HEIGHT WHEN GROUTING THE ELLIPTICAL COLUMN CASINGS? IF SO, DOES THE HEIGHT VARY WITH COLUMN CASING THICKNESS? See Section 10-1.35 “Column Casing” on page 111 of the special provisions: The Contractor shall limit the height of each lift of grout to minimize undulations and displacements of the surface of the shell during grouting. Undulations in the shell surface, including undulations from fabrication and erection, shall not exceed 1/4 inch per foot nor shall the total displacement from plan location exceed 2 inches at any point. At the Contractors option, a bracing system or other means may be employed to restrain the casing within the specified tolerances. Except where shown on the plans, restraints shall not pass through the columns. The grout shall harden prior to placing the next lift of grout, unless a bracing system is used. NOT
