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Plastic vertical drainage board, extrusion molding plastic core board is among, is the skeleton and channel drainage belt, its cross section is parallel cross, both sides with nonwoven geotextiles package filter layer, core belt supporting role and will be filtered through filter layer water discharge upwards, plastic drainage plate insert soft soil foundation by driving machine. Under the upper preloading load, void water in soft soil foundation by plastic drainage plate into the upper bedding sand or horizontal plastic drain, by other local discharge, accelerate the consolidation of soft ground. In the soft soil foundation treatment, the effect of plastic drainage plate design, construction equipment basic same as bag of sand drain.

The advantages of plastic drainage plate reinforcement of soft soil foundation:

1, the plastic drainage plate can be inserted in the ultra soft ground plate construction.

2, good water, plastic drainage plate filter drainage unblocked, drainage effect is guaranteed.

3, plastic drainage plate section size is small, small play in the process of the drainage plate on foundation disturbance.

4, material has good strength and ductility, can fit the foundation deformation without affecting the drainage performance.

5, short construction period, lowcost plastic drainage plate, a day for each driving machine board above 15000 m, cost less than a bag of sand drain. For the deep soft soil foundation using drainage consolidation method for reinforcement, from technical and economic considerations, use drainage board is almost the only economic, effective and feasible method.