Stage construction of an elevated box girder and roadway structu

Details Stage construction of an elevated box girder and roadway structu Stage construction of an elevated box girder and roadway structu

1977-04-20

1978-10-31

Pavelko, Thomas P.

Plastic and nonmetallic article shaping or treating: processes

Forming structural installations in situ

Repositioning or moving mold to form sequential portions of...

14 73, 52174, 249 20, 264 34, 264228, 425 63, E04B 116, E01D 1912

Patent

active

041234855

ABSTRACT:
An elongated elevated box girder and roadway structure is constructed in a number of individual elongated sections with the support structure and formwork being reused, in turn, for each section. Each section is constructed in a number of stages. Initially, a support structure is built up from grade or is mounted on permanent upright members of the structure being formed, such as piers or abutments. Formwork for the bottom slab and the upright outside webs of the box girders are placed upon the support structure. Concrete is poured into the formwork for the bottom slab and webs and, after being allowed to set for a given period, and posttensioned, if necessary, the formwork is stripped and the support structure is removed. The support structure and formwork are then moved and set up for the next section to be constructed. The roadway slab includes the top slab of the box girder and cantilever sections extending laterally outwardly from each side of the top slab. The roadway slab is supported from the previously poured bottom slab and webs It can be poured in one or two steps, pouring the entire roadway at one time or first pouring the top slab and then, after supporting the formwork of the cantilever sections from the top slab, pouring the cantilever sections. After the concrete for the roadway sets for a given period, its formwork is stripped, moved and set up for pouring the next section.

REFERENCES:
patent: 3084481 (1963-04-01), Silberkuhl
patent: 3906687 (1975-09-01), Schupack
patent: 3985480 (1975-04-01), Finsterwalder
patent: 3989218 (1976-11-01), Muller

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