Drop Weight Deflectometer for Continuous Measurement of Pavement Deflection

Abstract

The invention discloses a drop weight deflection meter capable of continuously measuring deflection, which includes a tractor, a drop weight structure installed on the tractor, a transmission structure, and a movable sensor structure, wherein: the invention drives a cycle through the tractor The orbital movement drives the movable sensor structure to move along the circular track through the outer transmission chain installed on the periphery of the circular track. During the movement of the movable sensor structure along the circular track, the bearing plate of the movable sensor structure can fall to the ground, and Relative to the ground is still, at this time, the heavy hammer action of the drop hammer structure can hammer the impact platform of the drop hammer structure and transmit it to the ground, and the displacement sensors of the movable sensor structure can detect the deformation of the ground due to hammering The subsequent sinking value. It can be seen that the present invention can monitor the deflection data during the driving process, therefore, can quickly determine the bearing capacity of each compacted layer of the roadbed and the overall bearing capacity, and the evaluation index is the modulus of resilience.

Description

Technical field [0001] The present invention relates to a drop hammer bending apparatus, in particular a drop hammer capillary capable of continuously measuring the bending of the road. Background technique [0002] Deflectometer due to its own merits, the country has been increasingly widely used, and now there are two main Deflectometer, manual measurement methods Beckman beam method, as well as the increasing popularity of our falling weight deflectometer. At the same time, Europe is developing an infrared measurement method, but since the body's own amplitude is far from being in a quantity level, it has not been put into use. [0003] However, two commonly used curved sets currently have a lot of disadvantages. Beckmann is measured by artificial measurement. On the one hand, it takes a lot of manpower. On the other hand, it is easy to operate because people are inaccurate. The most important thing is that this method is too slow, and it does not meet the actual demand. The d...

AI Technical Summary

Problems solved by technology

At the same time, Europe is developing an infrared measurement method, but it has not been put into use because the vibration amplitude of the body itself is far from the same order of magnitude as the deflection amplitude.

[0003] However, the two commonly used deflectometers also have great shortcomings.

The measurement of deflection by the Beckman beam method is based on manual measurement. On the one hand, it requires a lot of manpower. On the other hand, it is easy to be inaccurate due to human operation. The most important thing is that the measurement of this method is too slow, which seriously does not meet the actual needs.

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