Segment-prefabricated T-beam bridge structure configured with internal and external prestressing tendons, and construction method for T-beam bridge structure

Abstract

The invention discloses a segment-prefabricated T-beam bridge structure configured with internal and external prestressing tendons, and a construction method for the T-beam bridge structure. A T-beambridge is longitudinally divided into 3-5 segments along a bridge span; and the segments are prefabricated in a factory, transported to a location near a bridge site, and assembled and connected through internal and external mixed tendon allocation. A segment-prefabricated, assembled and simply supported T-beam comprises a central segment, beam end prefabricated segments, the internal prestressingtendons, the external prestressing tendons, cast-in-situ wet joints, diaphragm plates, external prestressing tendon steering blocks, and external prestressing tendon anchoring blocks, wherein the central segment and the beam end prefabricated segments of the T-beam are manufactured in the factory, transported to the bridge site and integrated through the cast-in-situ wet joints, and the internaland the external prestressing tendons are tensioned to complete assembly of a bridge span structure. The T-beam prefabrication and assembly technology provided by the invention is applicable to the bridge site without overall prefabrication conditions; segment prefabrication facilitates land transportation and achieves convenient hoisting; and the external prestressing tendons facilitate subsequent supplementary tensioning and overhauling, so that the comprehensive performance of the bridge is greatly improved.

Description

technical field [0001] The invention belongs to the technical field of bridge engineering, and relates to a structure and construction method of a prefabricated assembled bridge, in particular to a structure and construction method of a segmental prefabricated T-beam bridge equipped with internal and external prestressed beams. Background technique [0002] Prefabricated prestressed concrete T-section girder bridge (referred to as T-beam bridge) is a common bridge type among medium and small-span concrete bridges in my country. It has the advantages of large section rigidity and good economy. However, in actual engineering, some bridge positions do not have the conditions for site prefabrication. If the whole hole is prefabricated in a different place, land transportation often becomes a restrictive condition. [0003] For this reason, this patent proposes that the traditional overall prefabricated T-beams should be prefabricated in different places, and then prestressed on ...

AI Technical Summary

Problems solved by technology

However, in actual engineering, some bridge positions do not have the prefabrication conditions on site. If the whole hole is prefabricated in a different place, land transportation often becomes a restrictive condition

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