Asphalt pavement large core sample drilling method

Abstract

The invention relates to the technical field of highway engineering, in particular to an asphalt pavement large core sample drilling method. The method comprises the following steps: firstly, determining a drilling position of a large core sample and drilling positions of at least two small core samples; the circle where the drilling positions of the two small core samples are located is tangent to the circle where the drilling position of the large core sample is located. And cutting the road surface according to the drilling position of the large core sample and the drilling positions of the at least two small core samples. And taking out the two small core samples and then taking out the large core sample. The method comprises the following steps: firstly, taking out a small core sample with light weight through a clamp; and after the two small core samples are taken out, a cavity is left on the side surface of the large core sample after the two small core samples are taken out. And the two holes facilitate the stretching of tools such as a crowbar into the bottom of the large core sample to loosen the large core sample, so that the large core sample can be taken out conveniently. Meanwhile, the core sample is taken out from the side surface or the bottom of the large core sample, so that the top of the large core sample can be prevented from being damaged, and the integrity of the core sample is ensured.

Description

technical field [0001] The invention relates to the technical field of highway engineering, in particular to a method for drilling large core samples of asphalt pavement. Background technique [0002] With the development of pavement technology, conventional pavement detection methods are difficult to accurately evaluate the overall condition of the pavement, and it needs to be improved and updated in all aspects, and the update of detection methods is one of them; therefore, in order to better, To more accurately evaluate pavement conditions, it is necessary to carry out some unconventional test methods. [0003] One of the existing detection methods for evaluating the technical status of pavement is to drill core samples, and the standard core sample size is φ100mm or φ150mm. Due to the small size of the core sample, it is difficult to carry out types of tests such as rutting tests, and it cannot reflect In the case of diseases whose range exceeds φ150mm, and larger core ...

AI Technical Summary

Problems solved by technology

[0004] However, due to the large diameter of the core sample, it is difficult to remove the core sample from the road surface with the conventional clamping method after cutting the pavement with the coring machine, which is inefficient and easy to cause damage to the core sample

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