| 摘要 |
A method for direct measurement of the vertical displacement of a point on the surface of pavement upon application of a load thereto is disclosed. This method measures the vertical displacement through the use of optical equipment. Specifically, the displacement is equivalent to the vertical movement of an optical focusing element between the position of the element when a point on the surface of the pavement is in focus with and without the application of the load. This point linear displacement measurement can also be applied to the calculation of a volumetric displacement. An apparatus capable of carrying out these methods is also described.
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