Bridge deck pavement layer field shear test device and method

Abstract

The invention relates to a device and a method for carrying out shear test on an interface of a steel bridge deck and a pavement layer. The device comprises a pavement layer, wherein a cylindrical pavement layer test piece is drilled from the pavement layer; a test piece fixture is fixedly connected with the pavement layer test piece; a torque sensor is horizontally fixed on the test piece fixture; a torsion platform can be rotatably connected with the torque sensor at the lower part and a force measuring ring at the upper part; the force measuring ring is composed of an outer ring and a forcemeter arranged at the middle part of the outer ring, a base is arranged at the bottom of the outer ring, and a hydraulic jack is fixed at the top by virtue of a screw; and a counterforce frame is erected at the upper end of the hydraulic jack, the counterforce frame is relatively fixed with the pavement layer by virtue of self gravity, the bottom of the counterforce frame is hollow, and the upper surface of the pavement layer test piece is exposed. Multiple test conditions can be compatible, overall structure of the pavement layer and the structure of the shear test device are simple, test method is easy to operate, and pavement layer shear stress and shear failure energy are adopted for evaluating shear behaviour of the overall structure of a bridge deck pavement layer.

Description

technical field [0001] The invention belongs to the technical field of bridge deck pavement of highway bridges, in particular to an on-site shear test device and method for bridge deck pavement layers. Background technique [0002] With the rapid development of my country's economy, the road and bridge construction industry has made great progress, and bridge construction has reached the world's leading level. As an important part of the bridge structure, the pavement layer of the bridge deck, under the action of comprehensive external factors, causes the pavement layer disease caused by the insufficient shear resistance of the overall structure of the pavement layer, which is specifically manifested as permanent deformation of pushing and delamination, cracks etc. Therefore, the overall shear performance of the bridge deck pavement structure is an important mechanical index of the bridge deck pavement structure, which needs to be accurately measured. [0003] At present, ...

AI Technical Summary

Problems solved by technology

The pavement interface shear test usually adopts indoor direct shear and oblique shear methods. A fixture and method for testing the interlayer shear performance of the pavement are disclosed in the prior art. This method does not target the pavement. The overall structure of the deck pavement is based on indoor tests, and it is impossible to accurately measure the actual damage of the overall structure of the deck pavement when it is sheared.

Therefore, the current existing test devices cannot accurately measure the shear characteristics of the overall structure of the bridge deck pavement, and there are test deviations

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