After the high pressure grouting pile reinforcement soft soil foundation as common methods, excavation sealing curtain rig, grouting pipe is to use the rig to drill with a special nozzle to a predetermined depth, with high-pressure equipment so that a weak foundation soil solid caking agent 20mpa slurry or water become more high-pressure jet ejected from the nozzle, impact damage weak foundation soil, and with the active pipe rotation and promotion, Heilongjiang sealing curtain rig, driven at a constant speed of rotation grouting pipe and upward , forced mixing the slurry with the soil particles, triple pipe sealing curtain Shi rig, mixed with soil particles in the slurry body to be set and harden to form a high strength, low compression of the soil complex. Double pipe grouting method, that is, on the basis of a single tube, sealing curtain rig rotary jet pile, increase air compressor, wrapped in a slurry with a high pressure gas cutting soil. All the rig, single and double pipe pile Tianjin-strong company can do, which fully hydraulic models walking XPB-20, track-type XPL-50, single and double triple tube construction can be applied.