Drainage pavement structure depth correction method based on CT scan image

Abstract

The invention relates to a depth correction method of drainage pavement structure based on a CT scanning image, comprising the following steps: first, manufacturing a test piece; 2, measuring that void fraction; 3, measuring that structural depth of each molded sample by a manual sand lay method; Fourth, measuring the structural depth of the molded specimen by CT method; The fifth step, modifyingthe structural depth of the molded component and establishing the mathematical model between the structural depth correction and void fraction. A CT scan image method and a manual sand laying method are used to obtain that structural depth value of a drainage pavement under different void ratios and structural combination forms, The difference between the measured value by manual sand laying method and that by CT method is used as correction value. Based on this, the relationship between the structural depth correction value of single-layer and double-layer drainage pavement and the void ratioof drainage layer is established, so as to correct the measured result by manual sand laying method and provide reference for practical engineering.

Description

technical field [0001] The invention relates to a method for correcting the depth of drainage pavement structure based on CT scanning images, and belongs to the technical field of depth measurement of drainage pavement structure. Background technique [0002] With the increase of pavement service time, the long-term vehicle load will have a polishing effect on the pavement, reduce the anti-skid performance of the pavement, and form a traffic safety hazard. Therefore, long-term monitoring of the anti-skid performance of pavement is required. In road engineering, the structural depth of the pavement is often used to characterize the macroscopic skid resistance of the pavement. Among the many methods of testing the structural depth, the manual sanding method has become one of the main testing methods for the structural depth of the road surface due to its convenience. However, when the sand laying method is applied to the drainage pavement, there are many interconnected voids...

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to overcome the disadvantages of the existing manual sanding method and the inconvenience of the CT scanning method for the measurement of the on-site drainage pavement, and provide a method for measuring the manual sanding method with a CT scanning method with high measurement accuracy. The experimental method of correcting the structural depth combines the simple and fast advantages of the manual sand-laying method with the high-precision advantages of the CT scanning method, and establishes a mathematical model between the corrected value of the structural depth and the porosity of the drainage pavement. Structural depth measurement of drainage pavement provides theoretical basis and guidance

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