Method of accurately positioning a prefabricated structure on th

Details Method of accurately positioning a prefabricated structure on th Method of accurately positioning a prefabricated structure on th

1987-01-15

1988-08-30

Reese, Randolph A.

Hydraulic and earth engineering

Marine structure or fabrication thereof

Floatable to site and supported by marine floor

405209, 405203, 14 77, E02B 1702, E01D 2100

Patent

active

047672382

ABSTRACT:
A method consists in at least partially surrounding a prefabricated structure by means of a floating caisson while leaving a gap of several meters between the caisson and the structure. Then, when the floating assembly constituted by the caisson and the structure is located at the site where the structure is to be grounded, the assembly is positioned and oriented approximately and the caisson is grounded on the sea bed or on a river bed by ballasting. Thereafter, the structure is grounded on the bed accurately in position and in orientation by ballasting the structure while using the grounded caisson as a fixed point for positioning and orienting the structure. This method may be used for accurately grounding a foundation for a bridge pier, and it also makes it possible to prefabricate and assemble a bridge superstructure (pier, pylon, deck, shrouds) on land or in a harbor, with the superstructure being temporarily supported on the caisson.

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