DOME SHAPED STRUCTURE AND METHOD FOR CONSTRUCTING SUCH STRUCTURE

摘要

A vertical cylindrical tank of large diameter for storage of cryogenic, condensed gas, such as methane, comprising an inner primary tank (1) and an outer secondary tank (2), and a dome shaped roof (3) resting on tank ring beam (42) constructed on top of the side wall (4) of the secondary tank. The tank has a dome shaped roof (3) formed of a first lower dome shaped layer (5) of formwork elements resting on a dome shaped, temporary trusswork (8) formed by meridionally oriented, upwards convex, curved girders (10) spanning over a circle sector of the roof (3). Each girder (10) is resting at its outer end on tank ring beam (42). Each girder (10) is supported near its inner end by a temporary support tower (12). A second concrete layer (14) is concreted in-situ on top of the layer of formwork elements (6). Said second layer becomes self-supported upon completion of the curing process. A third layer of concrete (19), is concreted in-situ on top of the second layer (14) of concrete and is at least partly supported by the second, cured and self-supported layer (14) and by the first layer (5) and the dome shaped trusswork (8), supported by the sing beam and the temporary support tower (12).