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Before Construction
Equipment Inspection: Thoroughly check the double - drum vibratory roller to ensure that all parts are in good condition, and debug the compaction parameters of the roller to optimize its performance.
Construction Plan Preparation: According to the road design requirements, formulate a detailed construction plan, and use a digital construction management system to simulate and optimize the construction plan to ensure the efficiency and safety of the construction process.
Sub - grade Treatment10: Clean the surface of the sub - grade, check for oil pollution, and deal with it in time if there is any, to ensure that the sub - grade is clean and free of debris, which is beneficial to the bonding between the asphalt mixture and the sub - grade.
During Construction
Compaction Sequence: Follow the principle of "first static then vibratory, first slow then fast, high - frequency and low - amplitude, and close - following and slow - pressing". Generally, the compaction is divided into initial compaction, re - compaction and final compaction. The initial compaction should be carried out closely following the paver to compact the surface as soon as possible and reduce heat loss.
Speed Control11: The driving speed of the roller should be uniform. During the initial compaction, it should be driven slowly to avoid the movement or cracking of the asphalt mixture, because the mixture is still in a fluid state at this time.
Vibration Parameter Adjustment: In the re - compaction stage, the high - frequency and low - amplitude mode can be used to increase the density of the asphalt mixture. Adjust the vibration frequency and amplitude of the roller according to the type of asphalt mixture and the construction requirements to achieve the best compaction effect.
Temperature Control: Strictly control the temperature of the asphalt mixture. The initial compaction temperature should not be lower than 150℃, the re - compaction temperature should not be lower than 130℃, and the surface temperature at the end of compaction should not be lower than 110℃. Arrange special personnel to measure and record the temperature of the asphalt mixture in real - time.
Overlapping Width: Pay attention to the overlapping width during compaction. Ensure that there is a certain overlapping area between each pass of the roller to avoid missing compaction and ensure the uniformity of compaction.
Avoiding Abnormal Operations: When reversing, the vibration should be suspended to prevent affecting the flatness of the asphalt mixture and causing bulges. Try to avoid sudden braking, starting and turning during the compaction process to ensure the flatness of the paved surface.
After Construction
Surface Inspection: After the completion of construction, promptly inspect the paved surface, check the main control indicators such as elevation, compactness, flatness, thickness and water - seepage coefficient to ensure that they meet the design and specification requirements.
Seam Treatment: Pay attention to the treatment of transverse and longitudinal seams. For transverse seams, follow the construction requirements, use standardized repair techniques, and select asphalt materials according to the highway grade. For longitudinal seams, especially in the widened road sections, do a good job in filling and slope construction to improve the compactness of the road surface and prevent crack generation.
Equipment Maintenance: Clean the roller in time after construction, and carry out necessary maintenance and lubrication work to extend the service life of the equipment and ensure its normal operation in the next construction.
