A monitoring method for the roof reinforcement construction of a rigid-frame bridge with oblique legs

Abstract

The invention discloses a slant legged rigid frame bridge strut top reinforcement construction monitoring method which comprises the following steps: 1, arranging a strut top reinforcement support frame in a hanging manner between slant legs of a slant legged rigid frame bridge; 2, arranging a stress monitoring device on the strut top reinforcement support frame for monitoring and judging the pressure variation of the strut top reinforcement support frame in real time; 3, uniformly arranging a plurality of strut top reinforcement devices on the entire strut top reinforcement support frame; 4,synchronously adopting the strut top reinforcement devices to carry out strut top reinforcement on the slant legged rigid frame bridge to monitor the reading of a strut top force distribution monitoring sensor and a strut top displacement monitoring sensor in real time; and 5, when the stress and strain to the bridge body of the slant legged rigid frame bridge and the strut top reinforcement support frame reach the standard, adjusting the strut top reinforcement devices to enable the upper and lower parts of the strut top reinforcement devices to cling to the strut top reinforcement support frame. With adoption of the slant legged rigid frame bridge strut top reinforcement construction monitoring method, the integral rigidity of the slant legged rigid frame bridge is greatly improved, thesafety of the bridge structure is ensured, and the bearing capacity and the design bearing standard of the bridge are improved.

Description

technical field [0001] The technical field of the design and construction of highway bridge reinforcement of the present invention, in particular, relates to a method for monitoring the reinforcement construction of a rigid frame bridge with inclined legs. Background technique [0002] The oblique-leg rigid-frame bridge is a type of bridge commonly used in my country. Due to its mature design, reliable structure, simple construction, and beautiful appearance, oblique-leg rigid-frame bridges exist in large numbers on expressways or trunk roads in my country. Rigid frame bridges with oblique legs usually include a symmetrically arranged foundation and oblique legs, and the bridge deck is erected on the foundation and oblique legs. However, affected by the long-term shrinkage and creep of concrete, with the increase of service life, the mid-span deflection of rigid frame bridges will become more and more prominent, and the resulting prestress relaxation of rigid frame bridges a...

AI Technical Summary

Problems solved by technology

For the reinforcement of bridges that cannot interrupt traffic, the prestressed construction process under the bridge is complicated, and anchorage measures are installed on the damaged bridge to cause further damage to the bridge to be strengthened

Due to the complex loss of prestressed steel tendons, after the reinforcement is completed, the effective prestressing effect is difficult to monitor. Most of them are obtained by theoretical analysis and calculation. There is a certain deviation from the actual situation, which makes it difficult for the management and maintenance units to grasp the stress state of the reinforced bridge. Wait

During the reinforcement construction, measures to interrupt or restrict traffic, or to further increase the prestress effect, etc. are often used, which brings a lot of inconvenience to the project.

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