1. The role of the exciting force
The exciting force is one of the core working parameters of the plate tamping, and it mainly affects the compaction effect in the following ways:
1. Maintaining forced vibration: The exciting force can maintain the forced vibration of the compacted material, causing the material particles to vibrate or resonate.
2. Reducing internal friction: The exciting force can reduce the internal friction between soil particles, making it easier for the particles to move and rearrange, thereby achieving a denser state.
3. Forming shock waves: The shock force generated by the exciting force forms a shock wave that propagates to the inner layer of the surface, causing the compressed layer to deform permanently, further enhancing the compaction effect.
2. The specific impact of the exciting force on the compaction effect
1. Compaction efficiency: Under the same exciting force, the higher the exciting frequency, the higher the compaction efficiency and density. This means that high-frequency vibration can make the material reach the required density faster.
2. Compaction quality: Reasonable exciting force can effectively improve the compaction degree. If the exciting force is too large or too small, it may reduce the compaction effect.
3. Adaptability: Different working conditions require different exciting forces. For example, when compacting materials with low cohesion and friction between particles (such as river sand, gravel and asphalt, etc.), it is necessary to select the appropriate exciting force according to the characteristics of the material.
3. Select the appropriate exciting force
1. Select according to material type: For different types of materials, such as sand, gravel, asphalt, etc., different exciting forces need to be selected. For example, when compacting sand, the optimal exciting frequency is much greater than the main resonance frequency.
2. Select according to working conditions: At the construction site, the appropriate exciting force should be selected according to the specific working conditions. For example, when compacting RCC materials, it is necessary to select the appropriate amplitude and exciting force.
3. Consider equipment performance: The performance of the plate compactor is mainly affected by the quality of the whole machine, the exciting force and the exciting frequency. Therefore, when selecting equipment, it is necessary to comprehensively consider these parameters to ensure that the equipment can meet the construction requirements.
