Soil moisture content is a primary factor affecting the effectiveness of dynamic compaction. Whether it's too high or too low, it can both negatively impact the dynamic compaction process. Therefore, during the dynamic compaction construction process, there is typically an optimal moisture content that aligns with the requirements for heavy compaction. The natural moisture content of the soil is between 1-3% below the plastic limit moisture content and close to the moisture content for heavy compaction effects.

When the natural water content is close to the moisture content and does not exceed the plastic limit moisture content, and the moisture content distribution is uniform, the smaller the sum and difference of the final two blows' compaction, the deeper the depth of settlement eliminated; under the influence of surface water and groundwater, the natural water content of the soil mass is irregular. The soil quality and moisture content of the foundation directly affect the heavy compaction effect. When the natural water content is greater than the plastic limit moisture content, the influence depth of the same blow energy is greatly reduced, and soil rebound may also occur.

Compacting soil through heavy rolling: It is a process of first overcoming the soil's resistance to compression and densification, and then continuing to compact the soil (where soil particles are closely packed). When the soil moisture content is too low, the soil structure becomes rigid, with high resistance to compression and densification, requiring a large amount of energy from heavy rolling, making it difficult to compact the soil. When the soil moisture content is too high, the excess moisture occupies a certain space within the soil, making it difficult for the heavy rolling to be compressed and expelled instantaneously, leading to "rubber soil," which is also hard to compact. We hope this explanation is helpful to you, and thank you for your support.