Deflection value is an important indicator of highway health, which reflects the bearing capacity of subgrade and pavement. In this paper, the calculation method and measurement significance of deflection value will be discussed in depth to help readers better understand the health status of highways.

Calculation method of deflection value

The calculation method of deflection value is very simple, and it can be obtained by a formula. Lr=L+Zα×S, where lr represents the representative value of pavement deflection, l is the average value of rebound deflection, Zα is the guarantee coefficient, and s is the standard deviation of rebound deflection. In addition, the calculation of single point deflection value is quite simple: (initial reading-final reading) ×2.

Highway health assessment

Deflection value is one of the important indexes to evaluate highway health. Before highway reconstruction, deflection measurement of the original highway can fully understand its road conditions and provide a strong basis for design. During or after highway construction, deflection measurement is like a "physical examination" to ensure that the construction meets the design strength requirements.

Deflection value is an important indicator of highway health, which reflects the bearing capacity of subgrade and pavement. Imagine, if you are driving on the expressway, will you feel bumpy if the road conditions are not good? This is the deviation value at work! Knowing the deflection value is equivalent to mastering the "pulse" of the expressway.