A kind of annular anchor cable type prestressed concrete shell structure and construction method

Abstract

The invention discloses an annular anchor cable type prestressed concrete barrel vault shell structure and a construction method. A prestressed barrel vault shell structure comprises a prestressed annular anchor cable beam, a concrete barrel vault shell, a swimming anchor head, a sealing backing plate, a steel clamp plate, an anchor cable clamp sheet, a rubber waterstop seam and a reserved groove,wherein prestress anchor cables consist of a circular ring line anchor cable, an asymptotic line anchor rope and a flat straight line anchor cable, start from the anchoring end of the swimming anchorhead to be parallel to the outer edge of the barrel vault shell structure at equal intervals, are tensioned after the encircling for 360 degrees, and are locked at the tensioning end of the swimminganchor head. The construction method comprises the steps of anchor cable positioning and installation, reserved groove manufacturing, prestressed barrel vault shell casting and anticorrosion sealing treatment. The prestressed barrel vault shell structure can be applied to nuclear reactor containments, egg-shaped sewage digesters, pressure pipelines and large-size barns, can ensure the structure cracking avoidance under the inside and outside load or accidental collision conditions, and can prevent pressed air, gas and radioactive substances from escaping.

Description

technical field [0001] The invention relates to the field of structural engineering, in particular to a prestressed concrete shell structure and a construction method suitable for buildings with large cross-sectional spaces such as nuclear reactor containment shells, egg-shaped sewage digesters, pressure pipes, and large granaries. Background technique [0002] Buildings with large cross-sections (such as nuclear reactor containment, egg-shaped sewage digesters, pressure pipes, and large granaries) have special functions and are often large in size. Their structural design is one of the most difficult points in the engineering field. The shell structure can make full use of the strength of the material and at the same time combine the two functions of load-bearing and enclosure, so it is often used. Due to the difficulty of welding when steel plates are used for large-section structures, and the lack of durability due to anti-corrosion problems, reinforced concrete materials...

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Problems solved by technology

In addition, there are also a large number of cases at home and abroad that "caused internal pressure liquid and gas leakage due to pressure pipeline cracks, resulting in casualties"

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