HENRY PETER CERUTTI
Engineers in Seminole, PA
License number
Pennsylvania PE014752L
Category
Engineers
Type
Professional Engineer
Address
Address
Seminole, PA 16253
Professional information
Apparatus And Method For Providing Negative Buoyancy For Tunnel Forms
US Patent:
4407609, Oct 4, 1983
Filed:
Nov 20, 1980
Appl. No.:
6/208625
Inventors:
Henry P. Cerutti - Seminole PA
Robert A. Cannon - Allison Park PA
George G. Lindbloom - Allison Park PA
Robert A. Cannon - Allison Park PA
George G. Lindbloom - Allison Park PA
Assignee:
White Consolidated Industries, Inc. - Cleveland OH
International Classification:
E21D 906
US Classification:
405146
Abstract:
A method and apparatus for eliminating the necessity of providing hold-down devices, such as spuds and anchors, for opposing buoyancy in tunnel forms. The method comprises providing a movable counterweight car which preceeds the flow of fluid concretes, as it slopes from the crown of the tunnel forms downward and thus provides negative buoyancy at that area where there is the most fluid concrete and in that area where the most uplift occurs as well as the natural area where there are no forces of the crown helping to prevent flotation. The movable counterweight car is a hollow container curved to match the curvature of the excavated tunnel and clearing the movement of the forms. It has wheels that run on single track rails carried on the inside of the tunnel forms, the container being wholly or partly filled with steel scrap or punchings. The counterweight car has a fixed distance relationship to the discharge point of the concrete pump which generally precedes the discharge point of the slick line over the crown. A light cable connects the counterweight car to the slick line carrier or pump carrier and causes movement of the counterweight car at the same rate of speed as the slick line is withdrawn, thus synchronizing the movement of the counterweight car to the concrete pumping operation.
Pulsating Slip Form Apparatus And Method
US Patent:
4769192, Sep 6, 1988
Filed:
Mar 27, 1987
Appl. No.:
7/031278
Inventors:
Henry P. Cerutti - Seminole PA
Assignee:
Blaw Knox Corporation - Pittsburgh PA
International Classification:
E04B 116, E21D 1110
US Classification:
264 33
Abstract:
A method and apparatus for forming wet concrete employing a slip form having a radially expandable elastic outer shell comprising pouring concrete around the exterior surface of the outer shell and applying a fluid under pressure to the interior surface of the outer shell. The pressure of the fluid is pulsated so that the outer shell expands and contracts to reduce the friction between the outer shell and the concrete. The reduction in friction allows the form to be moved longitudinally along the concrete with reduced tearing of the surface of the concrete.