Traffic marking groove laser paving construction method
By using laser positioning and automated construction technology, the problems of insufficient adhesion and low precision in traditional traffic marking construction have been solved, achieving high-precision and high-adhesion marking construction, extending the service life of the markings and reducing maintenance costs.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- XINJIANG ROAD & BRIDGE CONSTR GRP CO LTD
- Filing Date
- 2026-03-19
- Publication Date
- 2026-05-29
AI Technical Summary
Traditional traffic marking construction methods suffer from problems such as insufficient adhesion between the markings and the road surface, low construction accuracy, short service life, and frequent maintenance. These methods fail to meet the requirements of modern roads for straight lines and precise dimensions, increasing road maintenance costs and hindering the improvement of traffic marking service efficiency.
By combining laser positioning technology with GPS and Beidou systems, a three-dimensional coordinate model is generated. The CAD design drawings are matched with the on-site coordinates to automatically plan the grooving and paving paths. The laser grooving machine and paver are used for marking construction, and glass beads are simultaneously spread by a mechanical spreader to ensure the adhesion of the markings, thus achieving the construction accuracy and adhesion of the markings.
It achieves high-precision control of the position and elevation of the road markings, enhances the adhesion between the markings and the road surface, improves the wear resistance of the markings, extends their service life, reduces later maintenance costs, and improves construction accuracy and safety.
Smart Images
Figure CN122105948A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of road marking construction technology, and in particular to a method for laser paving of traffic marking grooves. Background Technology
[0002] In the field of traffic engineering, road markings serve as crucial infrastructure for guiding traffic flow, channeling traffic, and ensuring driving safety. Their construction quality directly impacts the safety and comfort of road operations. High-quality road markings not only effectively convey traffic information and regulate driving behavior but also provide clear visual guidance at night or in adverse weather conditions, playing an irreplaceable role in preventing traffic accidents.
[0003] However, traditional traffic marking construction methods have revealed numerous technical drawbacks in long-term practice. On the one hand, the adhesion between the markings and the road surface is insufficient, making them prone to peeling and wear under vehicle pressure and natural factors, resulting in a short service life and frequent maintenance. On the other hand, construction relies on manual layout and experience-based operation, limiting the ability to control precision, especially when marking curves, transition sections, and complex patterns, making it difficult to meet the stringent requirements of modern roads for straight lines and precise dimensions. These problems not only increase road maintenance costs but also restrict the improvement of the overall service efficiency of traffic markings, making it difficult to adapt to the ever-increasing traffic load and safety demands. Summary of the Invention
[0004] The purpose of this invention is to provide a laser paving construction method for traffic marking grooves. Through precise laser positioning, the position and elevation of the markings can be controlled with high precision, effectively improving the construction accuracy of the markings, reducing traffic safety hazards caused by marking deviations, and significantly enhancing the adhesion between the markings and the road surface through the grooving process, greatly improving the wear resistance of the markings, extending the service life of the markings, and reducing the later maintenance costs.
[0005] To achieve the above objectives, the present invention provides a method for laser paving of traffic marking grooves, comprising the following steps: Calculate the coordinates of key points of the marking line based on the design coordinates, and mark the offset distance between the edge line and the center line of the marking line. A laser rangefinder is used to scan the road surface in real time. Combined with the GPS and Beidou positioning system, a three-dimensional coordinate model is generated. By matching the CAD design drawings with the on-site coordinates, the groove and paving paths are automatically planned, and the movement trajectory of the equipment is controlled. Operating a laser grooving machine to perform grooving operations on the road surface; Clean the inside of the tank; The laser paver is used for road marking paving, and a mechanical spreader is used in conjunction with the laser paver to spread glass beads synchronously.
[0006] In the step of calculating the coordinates of key points of the marking based on the design coordinates, and simultaneously marking the offset distance between the edge line and the center line of the marking: Calculate the coordinates of key points of the road markings based on the design coordinates. For straight sections, calculate one centerline coordinate every 50m. For curved sections, increase the coordinates every 20m. For complex areas such as intersections and entrances / exits, calculate the coordinates every 10m. At the same time, mark the offset distance between the edge line and the centerline of the road markings. The error between the position of the road markings and the design position shall not exceed ±10mm.
[0007] Among the steps involved in operating a laser grooving machine to perform grooving operations on the road surface: Before paving the road markings, operate the grooving machine to groove the road surface according to the design requirements for grooving depth, width and spacing. The construction speed should be controlled at 500-800 meters / hour, the maximum milling width is 1020mm and the maximum milling depth is 120mm. The grooving machine should move forward at a constant speed along the baseline to ensure that the grooving position is accurate, the depth is uniform and the lines are straight.
[0008] Among the steps involved in cleaning the tank: Remove any remaining gravel, dust, oil, or moisture after grooving to avoid affecting the adhesion between the marking material and the asphalt concrete pavement; the sweeping speed should be controlled at 5-10 km / h; ensure the groove is dry and free of loose material to ensure the edges of the marking are neat, without air bubbles or peeling after paving; manually clean the loose gravel, concrete debris, etc. in the groove with a steel brush or scraper, and then use high-pressure air to spray longitudinally from one end of the groove to the other to blow the dust and fine sand out of the groove.
[0009] In the step of operating a laser paver for road marking and simultaneously spreading glass beads in conjunction with a mechanical spreader: Adjust the position and height of the laser emitter to accurately project the laser beam onto the baseline on the road surface, forming a laser reference surface. Operate the laser paver to pave the markings along the laser reference surface. The paver's hopper is filled with molten marking paint, which is then evenly spread onto the road surface. During paving, control the paver's speed and the paint thickness to ensure a smooth, flat surface free of bubbles, cracks, or other defects. While the paver is in motion, the laser receiver receives the laser signal in real time and transmits it to the control system. The control system adjusts the paver's height and paving speed based on the signal. The markings are designed to be 200mm wide, 1.8mm thick, and 5mm high, with the paint paving temperature maintained between 180-220℃. A mechanical spreader is used in conjunction with the paver for synchronous spreading. The nozzle is 30-50cm from the marking reference surface to ensure even dispersion of the glass beads, with the spreading rate controlled at 350-400g / m².
[0010] The present invention discloses a laser paving construction method for traffic marking grooves. Through precise laser positioning, it achieves high-precision control of the position and elevation of the markings, effectively improving the construction accuracy of the markings, reducing traffic safety hazards caused by marking deviations, and significantly enhancing the adhesion between the markings and the road surface through the grooving process. This greatly improves the wear resistance of the markings, extends their service life, and reduces later maintenance costs. Attached Figure Description
[0011] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below.
[0012] Figure 1 This is a schematic diagram of the process for a laser paving method for traffic marking grooves provided by the present invention.
[0013] Figure 2 It is a surveying and layout drawing.
[0014] Figure 3 This is a diagram of laser positioning operations.
[0015] Figure 4 This is a diagram of road surface grooving operations.
[0016] Figure 5 This is a schematic diagram of road surface grooves.
[0017] Figure 6 This is a diagram of the road surface cleaning operation.
[0018] Figure 7 This is a diagram showing the operation of checking the width inside the groove.
[0019] Figure 8 This is a diagram showing the operation of checking the length inside the groove.
[0020] Figure 9 It is a diagram showing the processing of hot-melt marking materials.
[0021] Figure 10 It is a diagram showing the operation of road marking paving and glass bead spreading.
[0022] Figure 11 This is a diagram showing the finished product of the road markings.
[0023] Figure 12 This is a diagram of the thickness inspection process.
[0024] Figure 13 This is a diagram of the retroreflection coefficient testing operation.
[0025] Figure 14 This is a diagram of the retroreflection coefficient testing operation. Detailed Implementation
[0026] Please see Figures 1-14 ,in, Figure 1 This is a schematic diagram of the process for a laser paving method for traffic marking grooves provided by the present invention. Figure 2 It is a surveying and layout drawing. Figure 3 This is a diagram of laser positioning operations. Figure 4 This is a diagram of road surface grooving operations. Figure 5 This is a schematic diagram of road surface grooves. Figure 6 This is a diagram of the road surface cleaning operation. Figure 7 This is a diagram showing the operation of checking the width inside the groove. Figure 8 This is a diagram showing the operation of checking the length inside the groove. Figure 9 It is a diagram showing the processing of hot-melt marking materials. Figure 10 It is a diagram showing the operation of road marking paving and glass bead spreading. Figure 11 This is a diagram showing the finished product of the road markings. Figure 12 This is a diagram of the thickness inspection process. Figure 13 This is a diagram of the retroreflection coefficient testing operation. Figure 14 This is a diagram of the retroreflection coefficient testing operation.
[0027] This invention provides a method for laser paving of traffic marking grooves, comprising the following steps: S1: Calculate the coordinates of key points of the marking based on the design coordinates, and mark the offset distance between the edge line and the center line of the marking. In this embodiment, this step is the measurement and layout. In the above process: calculate the coordinates of key points of the marking according to the design coordinates. For straight sections, calculate one centerline coordinate every 50m. For curved sections, increase the coordinates at 20m intervals. For complex areas such as intersections and entrances / exits, calculate the coordinates at 10m intervals. At the same time, mark the offset distance between the edge line of the marking and the centerline. The allowable error for road marking layout shall strictly comply with the requirements of "Road Traffic Signs and Markings" (GB 5768) and design documents. The error between the position of the road marking and the design position shall not exceed ±10mm; It should be noted that construction preparations are required before the above process, as follows: (1) On-site preparation Clear obstacles, debris, and oil stains from the construction site to ensure the road surface is flat, dry, and clean; according to design requirements, measure and lay out lines on the road surface to determine the position, width, and length of the markings, and set up control stakes and baselines; inspect construction equipment and instruments, such as laser pavers, grooving machines, and hot melt kettles, to ensure they are in good working order and operating normally; debug and calibrate the equipment to ensure construction accuracy; (2) Technical preparation Organize technical personnel to familiarize themselves with design drawings, construction specifications and related technical documents, conduct on-site surveys, and formulate detailed construction plans and technical briefings; provide technical training and safety education to construction personnel so that they can master construction techniques and key operating points and understand safety precautions. (3) Material preparation According to design requirements and construction specifications, purchase road marking paint, glass beads and other materials that meet quality standards; inspect the materials before they arrive on site to ensure that they are of qualified quality; put the road marking paint into a hot melt kettle for heating and melting, and control the heating temperature and time to make the paint reach the specified viscosity and fluidity; (4) Equipment preparation Laser positioning accuracy error ≤1mm, paving width adjustable range 300-600mm, coating heating temperature control accuracy ±5℃ to avoid coating overheating and aging or insufficient temperature affecting adhesion, groove depth adjustable range 2-5mm, in accordance with the relevant requirements of "Road Traffic Signs and Markings" GB 5768; Before construction, three key checks are completed: First, the laser emitter is calibrated by adjusting the straightness of the laser beam using a professional calibrator to ensure that the edges of the markings are straight; second, the heating system is tested by running it unloaded for 30 minutes to check whether the heating tubes heat up evenly and to verify whether the temperature display matches the actual temperature using an infrared thermometer; third, the grooving device is debugged by installing grooving cutters that meet the specifications and observing whether the grooving depth and spacing are uniform and whether the wear of the cutters is within the allowable range during trial operation. (5) Personnel preparation 1) Pre-job training Specialized training will be conducted for all construction personnel, covering topics such as methods and principles, equipment operation procedures, quality standards, and safety regulations. After training, an assessment will be conducted, which will include a theoretical exam and a practical exam. Those who fail the assessment will need to undergo retraining until they pass before they can be allowed to work. 2) Construction briefing Before construction, the technical supervisor organizes a technical briefing meeting to clarify the construction tasks to the technicians and construction teams, including the scope of the construction section, the type of road markings, the construction schedule, and the key points of quality control. During the briefing, the construction drawings (marking the location, width, and groove parameters of the road markings) and the actual site conditions must be considered to ensure that everyone understands their own responsibilities and operational requirements. After the briefing is completed, all personnel must sign to confirm, and the briefing record must be kept for future reference.
[0028] S2: A laser rangefinder is used to scan the road surface in real time. Combined with the GPS and Beidou positioning system, a three-dimensional coordinate model is generated. By matching the CAD design drawings with the on-site coordinates, the groove and paving paths are automatically planned and the movement trajectory of the equipment is controlled. In this embodiment, this step is laser positioning. During the process described above: a laser rangefinder (LIDAR) is used to scan the road surface in real time, and combined with the GPS / BeiDou positioning system, a three-dimensional coordinate model is generated. By matching the CAD design drawings with the on-site coordinates, the grooving and paving paths are automatically planned, and the equipment's movement trajectory is controlled (accuracy ±2mm). During construction, laser sensors continuously monitor the equipment's position. If the equipment deviates from the preset path, the control system automatically adjusts the direction of travel to ensure the geometric accuracy of complex lines (such as curves and arrows).
[0029] S3: Operate a laser grooving machine to perform grooving operations on the road surface; In this embodiment, during the above process: before paving the road markings, a grooving machine is operated to groove the road surface according to the designed groove depth, width, and spacing. The construction speed should be controlled at 500-800 meters per hour, with a maximum milling width of 1020 mm and a maximum milling depth of 120 mm. The grooving machine moves forward at a constant speed along the baseline to ensure accurate positioning, uniform depth, and straight lines. After grooving is completed, debris and dust in the grooves are cleaned promptly to keep the grooves clean. (1) The grooving machine uses a diamond cutter to mill rectangular or trapezoidal grooves on the road surface (the depth can be adjusted from 2 to 5 mm, and the width can be adjusted from 3 to 10 mm), forming a rough interface. This increases the contact area between the marking material and the road surface, and prevents the marking from peeling off through a mechanical interlocking effect; During the development of this method, in accordance with the design drawings, the marking width was 200mm and the thickness was 1.8mm, and the width of the road groove was controlled at 21mm and the thickness at 2mm. (2) Optimization of trough design Lateral grooves: suitable for lane markings, enhancing resistance to wheel crushing and shearing forces; Longitudinal grooves: used for arrow markings to improve edge durability; The oblique grooves (45°) are used for roads in rainy areas, taking into account both drainage and adhesion.
[0030] S4: Clean the inside of the tank; In this embodiment, during the above process: remove any residual gravel, dust, oil, or moisture after grooving to avoid affecting the adhesion between the marking material and the asphalt concrete pavement. The cleaning speed should be controlled at 5-10 km / h. Ensure the grooves are dry and free of loose material to ensure the edges of the markings are neat, free of air bubbles or peeling after paving. Use a steel brush or shovel to manually clean the loose gravel, concrete debris, etc. in the tank, and then use high-pressure air to spray vertically from one end of the tank to the other to blow the dust and fine sand out of the tank.
[0031] S5: Operate the laser paver for road marking paving operations, and use a mechanical spreader to spread glass beads synchronously in conjunction with the laser paver.
[0032] In this embodiment, during the above process: During laser paving, the position and height of the laser emitter are adjusted to accurately project the laser beam onto the reference line on the road surface, forming a laser reference surface. The laser paver is then operated to pave the markings along the laser reference surface. Molten marking paint is loaded into the paver's hopper and evenly spread onto the road surface through the paving hopper. During paving, the paver's travel speed and the paint thickness are controlled to ensure a smooth, even surface free of bubbles, cracks, and other defects. While the paver is in motion, the laser receiver receives the laser signal in real time and transmits it to the control system. The control system adjusts the paver's height and paving speed based on the signal. The marking design width is 200mm, thickness is 1.8mm, and protrusion height is 5mm. The paint paving temperature is maintained at 180-220℃. When spreading glass beads, a mechanical spreader is used, linked with the paver, to spread them synchronously. The nozzle is 30-50cm away from the reference surface of the marking to ensure that the glass beads are evenly dispersed. The spreading amount is controlled at 350-400g / m². The glass beads embedded in the surface of the marking form a directional reflection when illuminated by vehicle headlights, achieving nighttime reflectivity. This ensures that the markings maintain high reflectivity under low visibility conditions such as rainy nights and foggy days, significantly improving road safety. The road markings need to cure naturally through heat dissipation, but the ambient temperature must be ≥5℃ to avoid incomplete curing due to low temperatures. Traffic can be opened 30 minutes after paving, provided there are no indentations when lightly pressed with a finger. It should be noted that the marking paint needs to be prepared before the above process, as follows: Before heating, check that the heating, stirring, and temperature control equipment of the hot melt kettle are functioning properly. During heating, follow the steps of "low-temperature preheating (80-120℃) - medium-temperature melting (120-180℃) - high-temperature holding (180-220℃)," controlling the temperature in stages. The holding time should not exceed 4 hours to prevent heat aging. Start stirring when the coating softens at 80℃, maintaining a speed of 10-15 rpm at low temperatures and 20-30 rpm at medium and high temperatures, without interruption, to ensure the coating is free of solid particles and has a uniform color. Clean any residual impurities in the kettle before adding material, adding it slowly in batches, not exceeding 2 / 3 of the kettle's capacity at a time. After melting, filter the coating through a 100-120 mesh filter, cleaning the filter every 2 hours.
[0033] The laser paving construction method for traffic marking grooves described in this embodiment adopts three core technologies: laser precision positioning, mechanized groove pretreatment, and automated material paving, to achieve high precision, high adhesion, and long lifespan for the markings. The laser positioning technology is combined with the grooving paving process. Before construction, the laser transmitter and receiver are precisely adjusted. The laser positioning system can accurately emit laser beams and use the linearity and high stability of the laser to establish a reference surface with millimeter-level accuracy, replacing the traditional manual stringing or visual calibration, to ensure that the position, elevation and straightness of the markings meet the design requirements. During the initial setting stage of the marking material, mechanical grooving is performed to form regular anti-slip textures. During the grooving process, the speed and depth of the grooving machine must be strictly controlled; after grooving, debris in the groove should be cleaned in time to avoid affecting the adhesion between the marking and the road surface. During automated material paving, the paver's speed must be stable to ensure uniform thickness and a smooth surface for the markings. At turns, lane changes, and other special locations, the paver must slow down to ensure a smooth transition of the markings. The heating temperature should be adjusted appropriately based on the paint type and ambient temperature to maintain the paint's optimal viscosity (stop construction and properly treat joints when the temperature drops below 5℃). During paving, the speed and quantity of glass beads applied must be strictly controlled to ensure uniform application.
[0034] The laser paving method for engraving traffic markings described in this embodiment has the following characteristics: High-precision positioning: The laser positioning system enables millimeter-level precision control of the position, width, and pattern of the markings. The position error of the markings can be controlled within ±2mm, which is especially suitable for complex lines (curves, gradient markings) or special patterns (text, arrows). High-efficiency construction: Automated paving equipment operates continuously, and the construction speed can be 3-5 times that of traditional manual labor.
[0035] Integrated construction: Integrating grooving, cleaning, and paving into one process reduces manual intervention and improves efficiency. The paving material is laid and the surface grooving is completed simultaneously, reducing the time required for process transitions. Enhanced adhesion: The grooving process pre-grooves the road surface, increasing the mechanical adhesion between the marking material and the road surface, and extending its service life; Green and environmentally friendly: The laser system precisely controls the amount of materials used, reducing waste, with no solvent evaporation, low noise, and meets the requirements of green construction.
[0036] The laser paving method for grooving traffic markings described in this embodiment improves the quality and performance of traffic markings, enhances road safety, reduces traffic accidents, and protects the lives and property of the public. The excellent reflective and anti-skid properties of the markings improve road capacity and comfort, thus improving the road traffic environment. The reflective glass beads retained in the grooves are less prone to wear, significantly reducing the accident rate. The grooved surface increases the friction between the tire and the markings, effectively reducing vehicle braking distance and lowering the risk of skidding in rain and snow. The straight lines and clear edges reduce driver misjudgment caused by blurred markings. This technology integrates laser technology, automated control technology, and the application of new materials, promoting the transformation of traffic marking construction from "manual-driven" to "intelligent and precise," providing the industry with standardized and refined construction examples. At the same time, its technological achievements can be extended to municipal roads, airport runways, parking lots, and other scenarios, driving the upgrading of related equipment manufacturing, material research and development, and other industrial chains, helping transportation infrastructure construction to develop towards "intelligent and high-quality" directions, promoting the progress and development of traffic engineering construction technology, and improving the construction level of traffic engineering in my country.
[0037] The above-disclosed embodiments are merely one or more preferred embodiments of this application and should not be construed as limiting the scope of this application. Those skilled in the art can understand that all or part of the processes for implementing the above embodiments and equivalent changes made in accordance with the claims of this application still fall within the scope of this application.
Claims
1. A method for laser paving of traffic marking grooves, characterized in that, Includes the following steps: Calculate the coordinates of key points of the marking line based on the design coordinates, and mark the offset distance between the edge line and the center line of the marking line. A laser rangefinder is used to scan the road surface in real time. Combined with the GPS and Beidou positioning system, a three-dimensional coordinate model is generated. By matching the CAD design drawings with the on-site coordinates, the groove and paving paths are automatically planned, and the movement trajectory of the equipment is controlled. Operating a laser grooving machine to perform grooving operations on the road surface; Clean the inside of the tank; The laser paver is used for road marking paving, and a mechanical spreader is used in conjunction with the laser paver to spread glass beads synchronously.
2. The laser paving method for traffic marking grooves as described in claim 1, characterized in that, In the steps of calculating the coordinates of key points of the road marking based on the design coordinates, and simultaneously marking the offset distance between the edge line and the center line of the road marking: Calculate the coordinates of key points of the road markings based on the design coordinates. For straight sections, calculate one centerline coordinate every 50m. For curved sections, increase the coordinates every 20m. For complex areas such as intersections and entrances / exits, calculate the coordinates every 10m. At the same time, mark the offset distance between the edge line and the centerline of the road markings. The error between the position of the road markings and the design position shall not exceed ±10mm.
3. The laser paving method for traffic marking grooves as described in claim 2, characterized in that, In the steps of operating a laser grooving machine to perform grooving operations on the road surface: Before paving the road markings, operate the grooving machine to groove the road surface according to the design requirements for grooving depth, width and spacing. The construction speed should be controlled at 500-800 meters / hour, the maximum milling width is 1020mm and the maximum milling depth is 120mm. The grooving machine should move forward at a constant speed along the baseline to ensure that the grooving position is accurate, the depth is uniform and the lines are straight.
4. The laser paving method for traffic marking grooves as described in claim 3, characterized in that, During the cleaning process inside the tank: Remove any remaining gravel, dust, oil, or moisture after grooving to avoid affecting the adhesion between the marking material and the asphalt concrete pavement; the sweeping speed should be controlled at 5-10 km / h; ensure the groove is dry and free of loose material to ensure the edges of the marking are neat, without air bubbles or peeling after paving; manually clean the loose gravel, concrete debris, etc. in the groove with a steel brush or scraper, and then use high-pressure air to spray longitudinally from one end of the groove to the other to blow the dust and fine sand out of the groove.
5. The laser paving method for traffic marking grooves as described in claim 4, characterized in that, In the process of operating a laser paver for road marking and simultaneously spreading glass beads using a mechanical spreader in conjunction with the laser paver: Adjust the position and height of the laser emitter to accurately project the laser beam onto the baseline on the road surface, forming a laser reference surface; operate the laser paver to pave the markings along the laser reference surface; load the molten marking paint into the paver's hopper and spread the paint evenly on the road surface through the paving hopper; during the paving process, control the paver's travel speed and the thickness of the paint application to ensure that the marking surface is flat, smooth, and free of defects such as bubbles and cracks; During the paver's operation, the laser receiver receives laser signals in real time and transmits them to the control system. The control system adjusts the paver's height and paving speed according to the signals. The marking is designed to be 200mm wide, 1.8mm thick, and 5mm high. The paint paving temperature is maintained at 180-220℃. A mechanical spreader is used, linked with the paver, to spread the paint synchronously. The nozzle is 30-50cm away from the marking reference surface to ensure uniform dispersion of glass beads. The spreading amount is controlled at 350-400g / m².