Development and Experimental Study of Intelligent Vibratory Compaction System for High-speed Railway Subgrade Fillers
To address the limitations of existing vibratory compaction equipment,a large-scale indoor intelligent vibratory compaction equipment with a wide adjustment range of vibration parameters and real-time monitoring of dry density of fillers was developed to further quantify the new indicators of dynamic stiffness and strength for evaluating the compaction state of fillers.Firstly,the stable working mechanism of indoor vibratory compaction equipment was revealed based on vibration theory,meanwhile,a dynamic optimization method of vibration parameters was proposed.With the re-al-time calculation method for dry density being proposed based on surface settlement theory,a compaction performance evaluation method was formed by the compaction curve.According to the modified stiffness theory of lag angle and the similar modified strength theory,a comprehensive evaluation method of compaction state was proposed by the mechanical indicators of stiffness and strength.Secondly,the indoor vibration compaction system and data collection and analysis software were introduced to analyze the working performance of the system components and the test calculation method for the evaluation indicators.Finally,the experimental vibration compaction test was carried out to verify the reliability of the equipment.The results show that increasing the diameter of the container and the dead weight of the equipment can significantly improve the dry density of the fillers.When the equipment is at the resonance frequency,the stiffness of the fillers decreases,with increasing bearing capacity.Based on the dynamic optimization method of vibration parameters,the vibration energy output can be reduced by 30％,with further improvement of the compaction efficiency,and reduc-tion of the wear of compaction equipment and particle breakage.The research results help to deepen the analysis of the vibration compaction forming mechanism and provide a basis for the extensive application of the vibration compaction test method in the construction of high-speed railway subgrades.
high-speed railway subgradevibratory compactionvibratory theoryparameter optimizationsurface settle-ment methodcompaction state
万方数据
维普
