METHOD AND APPARATUS FOR STABILIZING A TRENCH FORM DURING CONSTRUCTION

摘要

A method and apparatus for forming a trench with grates or solid covers, comprising an outer shell (12) which is disposed between opposed frame members at a certain position within a ditch and an inner core (14) that is received within a channel (32) in the shell (12). The core (14) aids in providing rigidity to the shell (12) while concrete hardens about the outer surface of the shell (12). Rods (38) are vertically driven through the core (14) and the outer shell (12) into the bottom of the trench to stabilize the forms while the concrete or other setting material is poured into the trench. The rods (38) are removed before the material hardens. After the encasing material sets, the core (14) can be removed from the shell (12) which then enables the shell to be more easily displaced from the formed trench.