Road and bridge strength detection device

Abstract

The invention relates to the technical field of road bridge detection equipment, in particular to a road and bridge strength detection device, which is characterized in that a Beckman beam is canceled, two supports are arranged behind a detection point, laser range finders are arranged on the supports, the precision of the laser range finders can be as accurate as 1 mu m, and a deflection value can be accurately measured through the laser range finders.

Description

technical field [0001] The invention relates to the technical field of road and bridge detection equipment, in particular to a road and bridge strength detection device. Background technique [0002] The subgrade pavement is a structure subjected to vehicle loads. When designing the subgrade pavement, the mechanical properties of the subgrade pavement materials should first be correctly commented on, and then the pavement structure design should be carried out according to its mechanical properties to meet the normal driving requirements of the road within the service life. It should have sufficient strength, rigidity and stability during normal use, otherwise it will easily cause consequences such as cracking of the road surface; [0003] Strength is the ability of a material to withstand various stresses. It is the main indicator of the mechanical properties of the subgrade pavement structure. The strength of the subgrade pavement can be expressed by several indicators, su...

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Problems solved by technology

[0005] 1. The deflection value measured by the Beckman beam method is to expand the displacement change caused by the contact between the detection head and the detection point through the principle of leverage, but the multiple of this expansion is related to the detection head, the dial and the Beckman beam support point respectively. The spacing ratio and the specific value are determined, and the length of the Beckman beam is a fixed value, so the expansion multiple of this method is certain, and the value of the road surface deflection is very low, which makes the accuracy of this method not high;

[0006] 2. The deflection value is measured by the Beckman beam method. The final value is calculated from the reading of the dial, and the dial is a dial indicator. The final value is read by the operator. The subjective factor is too large, and the reading is not stable and accurate. ;

[0007] 3. In addition to the installation of equipment, when using the Beckman beam method to measure the deflection value, someone needs to drive, someone to direct, and someone to read. At least three people are required to do it at the same time. The demand for personnel is large and cumbersome.

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