The invention relates to a soft foundation treatment method employing '
cutting drainage deep preloading and dynamic consolidating'. Water sealing, strong drainage, deep-layer vertical
discharge system, vibrating compacting or
dynamic compaction are organically combined to reduce an additional load formed by the
ground water level of a deposal field, so as to carry out deep preloading on a soft substratum, finish consolidation of a soft soil layer and remove
sedimentation of a soft substratum; compactness and physical and mechanical indexes of a shallow
sediment are improved by organic combination of dynamic consolidation and
cutting drainage, and the capacity requirements on the field are met. The method comprises the following construction implementation processes of: 1)
punching a
waterstop curtain and a strong drainage
system, reducing the
ground water level and the
moisture content of a soil body; 2)
punching a vertical drainage channel penetrating a
silt seam, carrying out the deep-layer preloading and removing the
sedimentation; 3) carrying out the dynamic consolidating, so that the compactness and the physical and mechanical indexes of the shallow
sediment are improved, and the capacity requirements on the field are met. According to the method, the problems and the defects in the prior art are overcome, and the soft foundation treatment method has the characteristics that the schedule is short, the construction cost is low, the process is simple, the quality is controllable and the difficulty of deep-layer
silt engineering can be solved.