Asphalt pavement prefabricated block repairing pit slot structure and construction process thereof

Abstract

The invention discloses an asphalt pavement prefabricated block repairing pit slot structure and a construction process thereof. The number and the size of damaged road section pit slots are determined to perform unified processing of prefabricated blocks, the pit slots are excavated in a centralized mode for unified filling repair, a construction period is short, and the influence on traffics is small. According to the process, the closing time is short, used repair materials are convenient to store, and are cold-mixed in a normal temperature state and are easy to form, a preparation process is simple, the early strength is high, the forming time is short, the elasticity modulus is moderate, the cooperativity with the road surface is good, and a second interface healant layer, a geotechnical grid layer, a CAS layer, a second interface healant layer and a prefabricated block layer are sequentially laid and are fixed by an interface healant. The asphalt pavement prefabricated block repairing pit slot structure is simple, high in strength, capable of performing line production and high in repair efficiency and is especially suitable for emergent repairs, such as rescue and relief works for road smoothing. Filling buffer and embedment roles are played between the CAC prefabricated blocks and original road surfaces to prevent water from seeping into joints.

Description

technical field [0001] The invention belongs to the field of road disease treatment, and in particular relates to a construction technique for repairing potholes with asphalt pavement prefabricated blocks. Background technique [0002] With the continuous deepening of reform and opening up and the rapid development of the national economy, my country's road transportation industry has also grown rapidly. Asphalt pavement has been widely used because of its comfortable driving, good flatness, short construction period and easy maintenance. By the end of 2014 , the total mileage of expressways in my country has reached 111,950 kilometers, of which asphalt pavement accounts for more than 90%. At the same time, there are also shortcomings in asphalt pavement. Under the coupling effect of external environmental conditions such as high temperature, rainy seasons and driving loads, asphalt pavement is prone to rutting, wrapping, potholes and other diseases, of which potholes account...

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Problems solved by technology

At the same time, there are also shortcomings in asphalt pavement. Under the coupling effect of external environmental conditions such as high temperature, rainy seasons and driving loads, asphalt pavement is prone to rutting, wrapping, potholes and other diseases, of which potholes account for It has a large proportion and has a serious impact on the smoothness of the road surface, driving comfort, and safety. Especially in my country, the characteristics of overloading and large-flow traffic are becoming more and more obvious, which intensifies the probability of pits on asphalt pavement

[0003] At present, the repair of asphalt mixture pits and grooves is mainly based on the use of hot-mix asphalt mixture or on-site cold patching method. The construction process is complicated, the requirements for equipment are high, the investment in personnel is large, and the closed traffic time is long, which is easy to cause traffic jams , and regardless of the hot patch method or cold patch method is greatly affected by the environment, it is easy to produce weak joints. In addition, due to the construction characteristics of long distance, small area, scattered construction and small amount of single patching materials, the road surface Although a lot of equipment and personnel are invested in repairing pits and grooves, the progress is slow, and repair materials are often wasted, which greatly hinders the smooth progress of pavement maintenance.

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