Driving the plastic drainage board could form the vertical drainage channel accelerate the vent Of hole water and the concretion of clay reduce the sedimentation after construction enhance the load-bearing ability of the foundation .

它可以在软土层中形成竖向排水通道，加速孔隙水的 排出和地基固结，减少工后沉降，提高地基土的承载 力。