Creation of rollers for compacting soils in dams: Fid-Bau Portal

Creation of rollers for compacting soils in dams

Pavchich, M. P. / Gorelik, L. V.

Conclusions 1. When modeling the rolling process on prototype soil it is necessary to fulfill the following conditions: a) the average pressure of the roller on the soil should be the same for the model and prototype; b) the roller speed should be assigned in proportion to the wheel diameter; c) the thickness of the placed layer should be assigned in proportion to the wheel diameter; d) the model and prototype soil-compacting parts of the roller should be geometrically similar; e) the number of roller passes should be the same for the model and prototype. For a pneumatic-tired roller the pressure in the tires, in addition, should be equal. For a vibrating roller the ratios of the dynamic component of the force acting on the soil to the static component should be the same, and also the frequencies of vibrations for the prototype and model should be equal. 2. An increase of the weight of the roller by n times with observance of similarity conditions makes it possible to increase simultaneously the width of rolling by √n times, rolling speed by √n times, and thickness of the compacted layer by √n times with achievement of the same soil density in the fill during the same number of roller passes. 3. The creation of rollers with a greater weight and greater engine power with a corresponding increased diameter and width of the wheel, other conditions being equal, permits a substantial increase of productivity of their work on compacting soil for a given pressure on the soil and given soil density in the fill. The development and introduction of such rollers into construction practice will make it possible to increase considerably the rate of constructing earth dams and to obtain a considerable economic effect.