The construction of the hottest highway requires r

Highway construction requires reasonable allocation of machinery

Guide: the early damage of the highway under the impact force exerted by the punch refers to the premature damage before the new highway is put into use and at the initial stage of highway use. There are many reasons for the early damage of the highway, such as unreasonable design, nonstandard construction, unscientific maintenance and management, but the damage of over limit construction machinery to the highway is particularly serious. Rural road

early damage of roads refers to the premature damage of new roads before they are put into use and at the initial stage of their use. There are many reasons for the early damage of the highway, such as unreasonable design, nonstandard construction, unscientific maintenance and management, but the damage of over limit construction machinery to the highway is particularly serious

rural roads are mostly class III and class IV roads. According to the nature and tasks of their use, the general design load is automobile class-10. The pavement structure is lime soil as the base and asphalt concrete or asphalt mixture as the surface (i.e. design standard: two layers of lime soil, cm thick; oil surface width of 5.m, cm thick). According to the technical standard for highway engineering, lime soil with a thickness of less than 15 cm must be rolled by a ton roller with a compactness of more than 95%. After appropriate curing, it can be covered when it reaches a certain strength. In recent years, with the acceleration of highway traffic construction, various road construction companies and enterprises have developed rapidly, and the construction machinery has been gradually modernized and large-scale. When they participate in the construction of low-grade highways, they often ignore the reasonable configuration and application of large-scale construction machinery

2003, when the author participated in the construction of a county and township road with a three-level road standard, it appeared in the lime soil completion inspection and acceptance process, and its strength, elevation and crown all met the design standards. However, during the oil surface completion inspection, it was found that there were obvious deviations in the road surface elevation and crown, such as prosthetic limbs, leaves forming a floating Christmas tree, beehives and supplies for astronauts in space. The thickness of the oil surface was no problem after inspection, It is judged that the pavement deformation was caused by the use of large transport vehicles during the overlay construction. The design technical grade of the road is grade III, and the calculated load is grade-10 (axle load limit tons). In the actual construction, the axle load mass of taituola and xinjiefang 143 dump trucks reaches 21 tons and 19 tons respectively, which greatly exceeds the design load standard of the road. According to the theory that "the destructive effect of the vehicle on the road surface is directly proportional to the power of the vehicle's axle load quality", the taituola and Jiefang 143 dump trucks involved in the construction drive once with a load, which is equivalent to 38 and 26 times of standard axle load vehicles. It can be imagined how much impact the lime soil base will bear after the completion of a covering project. Sometimes, in order to catch up with the construction period, the output of vehicle TDI will continue to increase without waiting for the end of the curing period, The damage will be greater. In other words, the road has suffered serious internal injuries before it was put into use, affecting its service life and quality, causing early damage to the road surface

therefore, it is very important to reasonably allocate construction machinery in highway construction, which is not only conducive to ensuring project quality, but also plays a positive role in avoiding waste and creating economic benefits. Paying attention to the rational application of construction machinery is of great significance for promoting highway construction with high quality and high efficiency

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