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Plastic Drain Board High Compaction

The construction process of plastic drainage boards involves using an insertion machine to insert the plastic drainage board into the soft soil foundation. Under the action of upper preloading load, the pore water in the soft soil foundation is discharged through the plastic drainage board into the sand layer or horizontal plastic drainage pipe laid at the upper part, and then discharged from other locations. This method accelerates the consolidation of the soft soil foundation.
To achieve this, the predecessor of BJ Vibro collaborated with a Korean company to develop the BJV-PVD75, a fully hydraulic steel wire rope pressurized plastic drainage board insertion machine. This equipment can be used in land and offshore environments, with an insertion depth of up to 75 meters, far exceeding the maximum construction depth of vibration hammers and chain pressurized drainage board equipment.

The dynamic compaction method, also known as the dynamic consolidation method, uses a large tracked dynamic compaction machine to freely drop an 8–30 ton hammer from a height of 6–30 meters. This vigorous impact compacts the soil, improving its bearing capacity and forming a relatively uniform, dense foundation. It effectively enhances reinforcement in saturated and unsaturated gravel soil, sand soil, silt, mixed fill soil, and other weak soils such as low-saturation cohesive soil and collapsible loess.
The rapid compaction (RIC) process is a new technology for foundation treatment that has emerged in recent years. The hydraulic cylinder lifts the compactor to a certain height and releases it, allowing the compactor to accelerate under combined gravity and hydraulic accumulator force. Upon impact, the compactor foot strikes the ground, improving the compaction treatment of the foundation soil.

Compared with traditional dynamic compaction methods, the RIC process features a smaller peak force but higher frequency of impact, resulting in prominent effects such as the prevention of dust and splashing. Compared with surface compaction techniques such as road rollers, the RIC process achieves a stronger, more uniform penetration capacity and is less prone to surface hardening. This allows it to deliver a uniform density over larger depth ranges during foundation treatment.

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