Soft ground treatment methods: surface treatment method for the surface a very weak situation. The law is through the drain, or add material means laying underground culverts soft foundation treatment to improve the surface strength to prevent partial basement shear deformation, to ensure the construction machinery operations; at the same time as the filling evenly distributed load on the ground. Belong to this type of treatment include: surface drainage method, sand cushion method, laying the material law, additive method, and so on. Soft ground surface drainage method design, construction Note: ① groove arrangement groove layout should consider the use of the natural slope of the terrain drainage; backfill settlement to pay attention to changes in slope; not to surface water from around the excavation site, the penetration of water immersion filling; trench interval as much as possible to encrypt, to increase the drainage capacity reinforcement of soft foundation treatment works, even if some grooves are cut will not prejudice the overall drainage. ② construction trench 0.5m wide groove dimensions and generally soft foundation treatment prices, deep 0.5 ~ 1.0m. Before filling in the trench backfill become blind ditch with a good permeable sand (gravel). Blind ditch along the road longitudinal general longitudinal or central longitudinal excavation, lateral blind ditch general arrangement pitch 10m ~ 15m. When embedded within porous drainage trench must be protected with high-quality filter layer.