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To solve the problem of justifying the characteristics of vibrating rollers, choosing a roller model for working under specific conditions, setting up the technological modes of compaction in a vibrating roller, it is required to model the dynamic interaction of a vibratory drum with the compacted soil. The mathematical model should allow us to study both the continuous and alternating contact operation modes of the vibratory drum and be consistent with the experimental results. The paper presents the results of the computational experiment based on a triple-mass rheological model of interaction between a vibrating roller and soil. It shows that the proposed model adequately reproduces vertical displacement and acceleration, as well as spectra of the vertical accelerations of a vibratory drum in a DM-614 roller during soil compaction. The conducted computational experiment of justifying the value of the apparent mass of soil showed that the best results can be achieved with value of the apparent mass of soil equal to 20% of the mass of the vibratory drum, which corresponds to the results of other researchers.

Rheological modeling of how the elements of a vibratory roller during soil compaction interact with each other allows the optimization of parameters of the roller and soil compaction modes based on the study of the obtained model, as well as the improvement of the soil compaction continuous control system, and the solution of other practically important tasks. To verify the models, it is required to compare the calculation results for the models with experimental data. The paper includes the results of experimental studies of the acceleration range for the vibratory drum of the DM-617 vibratory roller during soil compaction in the steady vibration mode, when the vibration is turned on, and when it is turned off. It is established that during the compaction of the soil in question in the range Evd = 14…25 MPa, the range of vertical movements and accelerations of the vibratory drum in the steady vibration mode does not depend on the soil density. When the vibration is turned on, the vertical movements and accelerations of the drum is 1.5…2 times higher than those of the steady mode. When the vibration is turned off, the vertical movements are increased by 1.5…2 times when passing the resonance zone, and the drum accelerations do not exceed the range of those in the steady vibration mode. The obtained results allow the mathematical models of vibratory rollers during soil compaction to be verified not only in the steady vibration modes, but also in transient modes, including passing the resonance areas when switching the vibration on and off.

Проблема контроля уплотнения дорожностроительных материалов при возведении строительных сооружений в настоящее время актуальна. Методы контроля качества уплотнения дорожностроительных материалов, использующиеся в настоящее время в РФ при приемке работ, позволяют оценивать не более 0,1% от общей площади уплотнения. На сегодняшний день существует большое разнообразие систем непрерывного контроля уплотнения дорожно-строительных материалов для вибрационных катков. Такие системы позволяют операторам вибрационных катков осуществлять мониторинг состояния уплотняемого материала при производстве работ в реальном времени, что значительно улучшает качество проводимых дорожно-строительных работ. Работа большинства систем контроля основана на расчете показателя уплотнения, получаемого при анализе спектра ускорений вибрационного вальца катка. На начальном этапе разработки отечественной системы контроля уплотнения грунта необходимо разработать и протестировать в полевых условиях новый, более совершенный показатель уплотнения, а также сравнить его с существующими показателями уплотнения...

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