Construction method for prestressed reinforced concrete-made circular arch-shaped tower

Abstract

The invention discloses a construction method for a prestressed reinforced concrete-made circular arch-shaped tower. The construction method comprises steps of measuring lofting, designing and manufacturing a rack, designing and manufacturing templates, burying pre-buried member, connecting trays, stand columns and stand column connection systems, manufacturing and installing sand cylinders, installing longitudinal beams, cross framed bents and connection systems, prestressing a main tower rack, installing templates, casting-in place concrete and maintaining the same, blanking and penetratingprestressed ribs, tensioning prestressed ribs, grouting prestressed pipelines, and dismantling the rack. A supporting system structure formed by steel pipe columns and framed bents is applied to construction of the prestressed reinforced concrete-made circular arch-shaped tower, so construction period can be greatly shortened, labor intensity and construction difficulty can be reduced; balance ofan arch-shaped structure can be guaranteed when the arch-shaped structure is stressed; bridge construction and post-operation safety can be ensured; obvious comprehensive economic and social benefitscan be achieved; and wide application value and reference meaning are provided for the similar bridge structure construction.

Description

technical field [0001] The invention belongs to the technical field of building construction, and in particular relates to a construction method of a prestressed reinforced concrete circular arch tower. Background technique [0002] According to the information currently available, the prestressed reinforced concrete bridge towers are mainly A-shaped, inverted Y-shaped, H-shaped, diamond-shaped, and single-tower designs. The corresponding construction technology is relatively mature. Sliding form continuous construction, and the circular arch tower design of the prestressed reinforced concrete circular arch tower bridge is currently the first case in the country, and there are no records of related design and construction methods in foreign countries. The design of the circular arch tower is beautiful in shape and reasonable in force, but the process technology is complex, the process is numerous, the technical quality requirements are high, and the construction is difficult...

AI Technical Summary

Problems solved by technology

The support method is to build a full house of steel pipe supports from the ground to the vault, and then carry out formwork, pouring, maintenance and other constructions. The biggest advantage of this method is that it does not require large hoisting equipment. The disadvantage is that the consumption of support formwork for construction is large and the construction The construction period is long, the investment of manpower is large, and the erection of steel pipe supports has high requirements on the bearing capacity of the foundation, and the bearing capacity of the steel pipe members of the conventional full house support is limited, and the safety risk is relatively large. For large-volume concrete structures, there are many sections and blocks. It has high requirements for pouring quality control measures, and has great limitations for the construction of bridges and high pier columns in mountainous areas; the non-support method mainly includes cable hoisting method, swivel construction method and hanging cantilever pouring method, and the non-support method is mainly used for weak foundations The superstructure construction of bridges in mountainous and hilly forest areas with high piers, high pier columns, and difficult support installation. The main construction feature is the use of towers, cables, hoops, or steering structures for segmental prefabrication and installation. The suspended operation takes a long time and poses a greater safety risk. Assembled segment by segment, the elevation error of the beam bottom easily exceeds the standard range when the two ends are closed, which is extremely unfavorable to the structural force, and the quality control is difficult

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