FIELD: construction. SUBSTANCE: longitudinal galleries are driven for the whole length of the structure. The casing walls are concreted. Then the upper vault is erected, with the vault resting on the finished walls. To attain these ends, the longitudinal galleries are driven above each casing wall. Then transverse galleries are driven from the longitudinal galleries at a distance from one to another along the contour of the structure upper vault. In these galleries the vault bearing member are erected in the form of individual arches, with the vault members driven and concreted between them. The distance between the transverse galleries is determined from a dependance presented in the description. EFFECT: improved design. 4 dwg
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Authors
Dates
1994-05-15—Published
1990-02-21—Filed