Real-time monitoring method and monitoring system for pavement thickness of high-grade highway

Abstract

The invention discloses a method and a system for monitoring paving thickness of a high-level highway pavement in real time, belonging to the field of road construction quality control. The method comprises the following steps: erecting an automatic tracking total station nearby a paving site, determining the position of an erection point through a resection survey method according to the known point coordinate, positioning and tracking a 360-degree prism according to enough short time interval by utilizing the automatic tracking total station, measuring the inclination angles of a transverse beam and a longitudinal beam of a platform trolley in the device by adopting an inclinometer, and measuring the distance from the transverse beam to the paved pavement by adopting a laser distance measuring sensor arranged on the transverse beam; calculating three-dimensional coordinates (x, y, z) of the position points of the paved pavement measured by each laser distance measuring sensor according to a spatial geometrical relation between each laser distance measuring sensor and the prism; projecting to obtain elevation z0 of the position point on a datum plane before paving; solving the difference between elevations z and elevation z0 to obtain the paving thickness; and judging whether the paving thickness at the position point accords with the control standard, otherwise, transmitting alarm information. The method is mainly applied to road construction quality control.

Description

Technical field [0001] The invention belongs to the field of road construction quality control, and in particular relates to a real-time monitoring method and monitoring system for the paving thickness of a pavement structure layer in a high-grade highway pavement paving process. Background technique [0002] Pavement thickness is one of the key indicators of high-grade highway construction quality control, and it is also an important factor affecting highway durability. According to the "Highway Engineering Quality Inspection and Evaluation Standards" (JTGF80 / 1-2004), the pavement thickness detection usually adopts the random insertion method [1-3] However, due to the limited number of samples, it is impossible to objectively reflect the paving thickness of the entire construction work surface, and the method is greatly affected by human factors, and the detection results may contain large errors. In addition, the wire-drawing method and the method of combining balance beams and...

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Problems solved by technology

In this way, on the one hand, it is impossible to obtain the absolute position coordinates corresponding to the measured pavement thickness; on the other hand, the detection device must be kept moving forward in one direction during the detection process, otherwise the measured value will accumulate from the initial measurement point. The distance does not reflect the real relative distance between the detection device and the initial measuring point, so these methods cannot intuitively and accurately indicate the absolute position of the pavement when the pavement thickness is unqualified

In addition, due to the heavy weight of the vehicle body used by this type of detection device or the lack of special treatment for the wheels and tires, it is easy to sink or soften on the newly paved high-temperature asphalt concrete pavement, so it cannot be applied to detect the newly paved asphalt concrete pavement, resulting in these methods only It can be applied to the detection of the pavement thickness after compaction and cooling, so it is not easy to realize the timely control and adjustment of the pavement thickness during the pavement paving process

Jaselskis [10] et al. used laser scanning technology to monitor the thickness of pavement pavement. Although this method can detect the thickness of full-section pavement pavement, it cannot measure the absolute coordinates of the installation position of the laser scanner with high precision (it uses GPS positioning, even if RTK is used). technology, the positioning accuracy can only reach the centimeter level in the Z direction), so it cannot meet the millimeter-level accuracy requirements in the thickness direction (that is, in the Z direction) required by the project.

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