In the following, the data and performance of DD-110 vibratory roller in highway construction are analyzed. 1 DD-110 double drive double vibration effect of 1.1 double drive active material is the pressure force of wheel H '=H and R' R '=R, vertical force on the compacted material, while the level of H' is the material driving force to the roller to move in the opposite direction, the mobile will be the driving wheel has been compaction of material resistance, the granular materials are pressed in high pressure moving close to the vertical line of the roller interval, thus forming the wavy surface of the driving wheel is not before, the compactness of the surface material will be fairly flat. Because the DD-110 roller adopts two wheel drive structure, with the excellent performance of compaction, does not produce the phenomenon of wave, so as to ensure the smoothness of pavement compaction, so also will the drive roller is called non corrugated roller, which is a rigid index must reach the highway. 1.2 double vibration vibration make the internal friction material pressure was dramatically reduced, shear strength decreased, so the compressive resistance is very small, very easy to be out of gas pressure in the material and liquid, which are embedded in crowded compacted. Because DD-110 has the function of double wheel vibration, the compacting efficiency can be greatly improved in the process of compaction, and the asphalt pavement is more favorable for the forming of the road surface and the quality of the construction.
In the highway construction, the rolling process is a process with large amount of input and the most quality and technical index requirements, especially for the construction of the asphalt pavement. The construction of asphalt pavement mainly includes mixing, paving and rolling three aspects. And compaction is an important link, and it has an important impact on the technical indicators, such as flatness, density and so on. In order to achieve good quality indexes in the process of compaction, it is necessary to have a comprehensive understanding of the selection of roller and the performance of each type of roller. We in the construction of highway pavement asphalt bole, through demonstration and practice of other units equipped with Ingersoll Rand DD-110 vibratory compaction machinery as the main highway in Bole high speed and high quality paving has played an important role.
The rolling action of 2 DD-110 amplitude and frequency selection of road roller mainly depends on the pressure wheel line pressure, different pressure line selection, and with the paving layer with stone strength and compacted should reach the bearing capacity and. Table 1 shows the strength of the stone and the required line pressure of the roller. Table 2 shows the required line pressure values for several main materials. Because the DD-110 roller has dual frequency 8 amplitude, greatly broaden the scope of its use in the work, can work in a variety of ways, i.e. a variety of line pressure, and pressure line can pass through the table 3 provides data and combined with the formula (1) to calculate the pressure machine under the condition of the road line pressure. The conversion of DD-110 operation mode is quite simple and quick, and the reasonable selection of visual material properties, compaction thickness and other indexes (Tables 1 and 2), therefore, has a wide range of application.
