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Influence of ultra wide paving of asphalt pavement on Pavement Flatness
March 30th, 2022
In highway engineering projects, the performance advantages of asphalt pavement are obvious. Asphalt pavement has high requirements for construction technology, especially the paving link, which contains many technical points. Flatness is a key index that needs close attention in asphalt pavement construction.

Ultra wide paving technology is often used in some asphalt pavement construction operations. Although the construction operation of this process is simple, convenient and economical, it has a direct impact on the pavement flatness. In order to fully understand the relationship between the super wide paving process and the actual flatness of the pavement, the enterprise should develop the most effective paving strategy according to the super wide paving process.

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In the application of ultra wide paving process, the assembly length of the screed is relatively large. During the paving operation, the mixture segregation and temperature segregation are difficult to avoid, and the rolling can not ensure the uniformity, so it can not ensure the realization of the goal of pavement flatness. In the whole paving operation, because the length of the screed is too large, the vibration problem in the paving operation is difficult to eliminate, which makes it difficult to ensure the consistency of the plane line during paving. In particular, if the telescopic plate paver is selected, it is difficult to maintain the gravity effect in a stable state during the continuous expansion and contraction of the screed, because the uneven pressure causes the paving surface to be in large or small fluctuation conditions, It has caused obvious interference to the lanes on both sides; The self weight of the screed of the paver may cause collision or intermittent shutdown during the continuous paving operation. The paver may be difficult to bear the weight of the screed. When the weight of the screed exceeds the limit weight that the paver can bear, it will cause a certain sinking of the paving part, resulting in the non-standard pavement flatness of the sinking part.
In view of the application effect of the current ultra wide paving process in the asphalt pavement, although its economic advantages are obvious, it has a great impact on the pavement flatness. In order to promote the realization of the asphalt pavement flatness, this process is generally used in the lower layer or lower structure layer. If it is applied in the upper layer or middle layer, we should pay attention to the width control in the paving operation.
Although the ultra wide paving technology has been applied in the construction of highway asphalt pavement at the present stage, the application and development of this technology is not mature, and there are still many technical problems. In the continuous development in the future, professionals should strengthen technical improvement and Optimization in view of the shortcomings of the current ultra wide paving technology, so as to improve the flatness of asphalt pavement under ultra wide paving.