Test method for shear stiffness between cement concrete bridge deck pavement and bridge deck

Abstract

The invention discloses an interlayer shearing rigidity testing method for a pavement layer and a bridge deck slab of a cement concrete bridge deck. The interlayer shearing rigidity testing method comprises the following steps: step 1, manufacturing a cement concrete bridge deck pavement layer and bridge deck slab shearing rigidity testing piece; step 2, horizontally clamping and fixing the testing piece on a positive-pressure simulation sub-system; step 3, vertically placing the testing piece; step 4, mounting an extensometer and a dial indicator; step 5, exerting positive pressure onto the testing piece by the positive-pressure simulation sub-system; step 6, simulating shearing test. The interlayer shearing rigidity testing method can test the shearing rigidity between the pavement layer and the bridge deck slab of the cement concrete bridge deck under different positive-pressure conditions, can realize shearing rigidity testing under different positive-pressure conditions through controlling the pressure exerted by a flat jack, and therefore, has strong university; as the size of the cement concrete bridge deck pavement layer and bridge deck slab shearing rigidity testing piece is specified, the standardability is good; vertical load is converted into an accurately simulated shearing force with relatively large adjustment range by a press, so that the testing accuracy is relatively high.

Description

technical field [0001] The invention belongs to the technical field of road and bridge construction, and relates to a method for testing the shear stiffness between a bridge deck pavement and a bridge deck, in particular to a method for testing the shear stiffness between a cement concrete bridge deck pavement and a bridge deck. Background technique [0002] The bridge deck pavement is an important part of the bridge superstructure. As a protective layer of the bridge structure, the bridge deck pavement protects the roadway slab from the direct wear of the traffic load and prevents the bridge slab from being eroded by rainwater; as the stress layer, the bridge deck The pavement plays a certain role in distributing the concentrated load of the vehicle wheel weight and transfers this load to the bridge superstructure. [0003] At present, the commonly used cement concrete bridge deck pavement structure in my country is cement concrete pavement layer + waterproof bonding layer ...

AI Technical Summary

Problems solved by technology

[0005] The invention discloses a method for testing the shear stiffness between a cement concrete bridge deck pavement and a bridge deck, in order to solve the problem that there is no testing instrument specially used for the shear stiffness between a bridge structure pavement and a bridge deck in the prior art , although there is a soil meter in geotechnical engineering, the size of the soil sample is too small compared with the shear stiffness test between the bridge deck pavement and the bridge deck, and it cannot apply large tonnage shear force, so it is difficult to extend to the bridge Interlayer shear stiffness test between surface pavement and bridge deck, etc.

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