US 4,051,570 AGranted

Road bridge construction with precast concrete modules

AssigneeHilfiker Pipe Co.

InventorWilliam K. Hilfiker

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Abstract

Precast concrete footings, stretchers, road slabs, and curbing in conveniently transportable sizes are used to construct road bridges and supporting abutments with a minimum of heavy equipment at the construction site. Each stretcher module comprises an elongated concrete body having at least two support heads with flat upper and lower surfaces for stacking one on another. All support heads are equally spaced and each contains a vertical hole for receiving a steel tie rod that extends from the footing to the top surface of the abutment for tying together the stacked stretchers. Anchor rods to deadmen and lateral tie rods interconnecting the wing walls of the abutment are connected to the vertical tie rods to form a rigid interlocked retaining structure for supporting the prestressed concrete road slabs.

Claims11

Dependent claims

A road bridge including an abutment therefor formed of readily transportable precast construction modules, said bridge comprising:

a footing placed below road grade;
generally vertical extending tie rods connected to said footing and extending upwardly therefrom, at least one of said rods being positioned adjacent each end of said footing;
at least one abutment stretcher positioned above and parallel to said footing, said stretcher having an elongated retaining body interconnecting support heads at either end of the stretcher, said heads having top and bottom stacking surfaces and each having a vertical hole therethrough, said holes being so spaced from one another that said holes will receive said vertical tie rods;
an abutment beam overlying the topmost of said abutment stretchers, said beam having holes spaced to receive said vertical tie rods;
means securing the beam to the tie rods to stress the rod and capture the stretchers beneath the beam between the beam and the footing;
and, a bridge roadbed placed with one end overlying and supported by said abutment beam.

3 more elements

Dependencies are inferred from the claim text.