Pretensioning method construction technology of 50m broken line reinforced concrete T-shaped beam

Abstract

The invention discloses a pretensioning method construction technology of 50m broken line reinforced concrete T-shaped beams, belonging to the technical field of bridge building constructions. The construction technology comprises the following steps of: foundation treatment; the design and fabrication of footstalls; the design and fabrication of reaction beams; the design and fabrication of tension beams; the design and fabrication of uplift piles; the fabrication and pre-embedment of a bent-up device; the design and fabrication of stranded steel wire tension connectors; the processing and colligation of reinforcing steel bars; the blanking and strand pricking of stranded steel wires; the tensioning of pre-stressed tendons; the fabrication and installation of templates; the pouring and maintenance of concrete; the relaxation of the pre-stressed tendons; and the pit-out and installation of T-shaped beams. The invention can solve various difficult problems in the prestress tensioning construction of high-span broken line reinforced concrete T-shaped beams and fills the gap of the technology of China, and the whole construction technology process and relevant control parameters has scientific and reasonable configuration, can meet the requirements of design and construction on quality, safety and the like, and have high operational instruction property. The invention can be widely applied to the stranded steel wire tensioning construction in structures similar to the high-span broken line pretensioning method T-shaped beams, the box girder and the like in engineering of large-scale buildings, bridges, wharfs and the like.

Description

technical field [0001] The invention belongs to the technical field of bridge building construction, and in particular relates to a pretensioning method construction technology of a 50m broken line reinforced concrete T-beam. Background technique [0002] From the 1950s to the 1970s, the achievements and magnificent projects of bridge technology in my country were dazzling, but the great progress of a science depends on the overall recovery and development of the economy. The reform and opening up has really started the development of my country's transportation industry, and the expressways have been newly built. With the improvement of road grades, bridges, especially arterial road bridges, have many technical indicators such as load standards, bridge width, bridge clearance, and design flood frequency. Comprehensive improvement, prestressing technology is widely used. With the continuous development of basic transportation construction such as highways and railways, some ...

AI Technical Summary

Problems solved by technology

At present, broken line reinforcement structure (reasonable stress) is used in the design of long-span prestressed concrete T-beams. Concentration, tension stress, tension beam stress, reaction beam stress and other characteristics during tension, the actual construction is very difficult, and there is no complete construction process in China

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