Payne has a cost effective, alternative to the traditional method of timber bracing and shoring of bridges.In most cases, eliminating the need of installing and removing temporary diaphragms. This method also frees up the top of the abutment for complete removal of the bearings and allows repairs to be made to the concrete. This method of shoring also reduces the time necessary for setting up while drastically reducing costs of labor, equipment, temporary wood timbers &plank bracing. On most projects, the system can be set up in approximately 1.5 hours per column using only a crew of three people with a small hydraulic boom.
This new, fully engineered and certified system provides an advantage over other systems in savings accrued through lower labor and materials costs while significantly reducing total project time.
How it works:
We use telescoping steel tubes with built-in hydraulic jacking cylinders that provide precise, synchronous lifting of all bridge support members. Because the supporting steel tubes are telescoping, the base to load distance is infinitely variable. Once the bridge is lifted to the specified amount, the pressure is taken off the hydraulic system by the insertion of steel shims, thus allowing the system to remain in place for an extended period of time without needing constant adjustments.
Each column is placed on a pad, that is specifically designed for each individual situation. The columns are then secured to the structure and a bracing system is installed that takes into account any dynamic loads imparted by winds or traffic. Once the columns are secured, the lifting of the structure is accomplished by the hydraulic jacks incorporated in the base of each column. The hydraulic system will supply equal volumes of fluid to each outlet, ensuring that all columns rise equally regardless of different loads they may be carrying. Each column is engineer certified to lift 110 tons per column and has a block off load of up to 400 tons each.
Tobin Bridge, Boston Ma. Our columns holding up a section of the bridge so that repairs can be made to the abutment and bearings.
The columns are braced together, secured and will lift equally even though they are each carrying different loads.
By using our columns, to support the Tobin Bridge, it remained open to traffic. Our columns allowed traffic to flow safely across the bridge, during all repairs.
Rt 101 over-pass in Epping NH. In this case the entire abutment and footing needed to be replaced. Our columns were able to hold up this section of a 236' long by 86' wide span and allow a 30' cantilever to facilitate construction.
These columns can be used in many different configurations, from a rectangular grouping to single units placed under each beam, or cord. They can vary in height from 12' to 30' .
