Bridge flexibility detection device and detection method

Abstract

The invention discloses a bridge flexibility detection device and a detection method, belonging to the bridge detection field. The detection device comprises a steel wire suspended on the bottom of the bridge, a flexibility detector connected to the lower end of the steel wire and a fixing seat fixed on the flexibility detector; the flexibility detector comprises a detector frame and an indication gauge fixed in the detector frame; the testing rod of the indication gauge is upwardly vertical; and the top end of the test rod is connected to the lower end of the steel wire. The detection method of the invention is based on the flexibility detector, cancels a suspension weight, reduces the adverse affect on the test result by the wind force, adopts the anchored steel chisel to replace the magnetic force table seat, saves the time and cost for establishing the platform, provides convenient and efficiency to the on-site installation and improves the working efficiency. The invention can effectively guarantee the resetting of the indication gauge test rod, greatly improves the accuracy and stability of the flexibility test. The indication gauge on the detector is provided with a spring which provides the needed pulling force and prevents the error caused by the deformation of the steel wire under stress, and the detection accuracy is improved.

Description

technical field [0001] The invention belongs to the field of bridge load monitoring, and in particular relates to a bridge deflection detection device and a detection method. Background technique [0002] The traditional bridge deflection measurement usually adopts the method of hanging steel wire + weight + dial indicator. The method is to set a hanging point at the bottom of the beam slab, hang a steel wire on the hanging point, hang a heavy hammer at the bottom of the steel wire, set up a dial indicator under the weight hammer, and install the dial indicator on a stable ground or platform through a magnetic base. This method of measurement has the following disadvantages: [0003] 1. The traditional method must use equipment such as steel wire, heavy hammer, magnetic table base, etc. The weight of a set of equipment is usually about 5kg, and at least 20 sets, about 100kg, are needed to measure a bridge. These devices are bulky, numerous in quantity, and heavy in weight,...

AI Technical Summary

Problems solved by technology

These devices are bulky, numerous, and heavy, making them difficult to carry

[0004] 2. In the traditional method, when the heavy hammer is suspended, it will shake irregularly under the influence of wind force, which will cause the dial indicator rod and the table base to shake and affect the measurement results.

[0005] 3. In the traditional method, unfavorable factors such as over-tightening of the clamp screw of the magnetic meter seat, a decrease in the stiffness coefficient due to fatigue of the spring inside the dial indicator, dust pollution or intrusion, etc. will affect the effective reset of the dial indicator rod

[0006] 4. In shallow water and muddy areas, the traditional method needs to build a stable magnetic table platform, which is difficult to construct, high in cost, and difficult to guarantee accuracy

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