Pavement deflection measuring system and measuring method

Abstract

The invention relates to a pavement deflection measuring system and a pavement deflection measuring method. The system comprises speed sensors, angular speed sensors, an acceleration meter, a mileage encoder and a processor, wherein a plurality of speed sensors are respectively arranged on load cross beams in different distance away from a load origin and used for measuring the changed speeds of the load cross beams where the speed sensors are positioned in the longitudinal direction; the angular speed sensors are used for measuring the rotating amplitude variations of the load cross beams; the acceleration meter is used for measuring the pitch acceleration value of a measuring vehicle; and the mileage encoder is used for recording the running mileage information of the deflection measuring vehicle. The measuring method comprises the following steps of: measuring the pavement deflection speeds of multiple points of a pavement by adopting the plurality of co-beam speed sensors, and calculating the dynamic deflection value of the pavement according to the elastic deformation theory of the pavement and model inversion. The system and the method are suitable for continuous sampling and measuring under dynamic conditions, are used for quickly and efficiently measuring the deflection value, saves manpower and material resources, and are more accurate and reliable in comprehensive estimation of road sections.

Description

technical field [0001] The invention relates to a road surface deflection measuring system and a measuring method thereof. Background technique [0002] The detection of pavement deflection is the basis for evaluating the bearing capacity of pavement, and it is very important for the control and inspection of engineering quality. In addition, it also determines the scientific level and credibility of road network maintenance decisions, and directly affects the allocation of maintenance funds and the maintenance of old buildings. Rationality of road reconstruction design. Although the equipment and methods for testing deflection are different in countries around the world, the understanding of the basic concept of deflection is the same. The definition of deflection generally refers to the total vertical deformation value (total deflection) or vertical rebound deformation value (rebound deflection) of the roadbed or road surface under the load of a specified standard vehicle...

AI Technical Summary

Problems solved by technology

[0005] At present, my country's pavement detection still mainly relies on the Beckman beam pavement deflection measurement method introduced from Canada in the 1960s. It adopts manual reading and manual recording, which has slow measurement speed, low precision and poor reliability.

Recently, a high-precision laser ranging sensor is also used to directly measure the deflection deformation of the road surface. Due to the complexity of the road surface texture, this method can only be measured under static conditions and is not suitable for dynamic conditions.

Images