PVD is a commonly used soft foundation treatment material. There are various shapes such as wave and harmonica. In the middle is an extruded plastic core board, which is the framework and channel of the drainage belt. Its cross-section is parallel to a cross, and both sides are wrapped with non-woven geotextiles as filter layers. The core belt plays a supporting role and discharges the water that seeps into the filter layer upwards. It is a good vertical channel for the use of drainage consolidation method for soft foundation treatment of saturated cohesive and mixed fill soil such as silt, silt soil, and flushing soil, greatly reducing the consolidation time of soft soil. PVD gets excellent physical, mechanical & hydraulic performance, which makes it an effective solution of Soft Ground Improvement to accelerate construction and reduce both time and magnitude of post-construction settlement.