Soft soil foundation reinforcing device

Abstract

The invention discloses a soft soil foundation reinforcing device. The soft soil foundation reinforcing device comprises a vacuum pre-pressing system and a grouting and pressurizing system. The vacuumpre-pressing system comprises a vacuum pump, a horizontal filter tube, a vertical plastic drainage plate and a vacuum pressure gauge; the grouting and pressurizing system comprises a header pipe, grouting equipment and an air compressor arranged at the tail end of the header pipe through three-way valves, a plurality of horizontal branch pipes connected to the other end of the header pipe and a plurality of vertical tubes separately connected to corresponding horizontal branch pipes, wherein a plurality of holes are formed in the lower middle portion of each vertical tube. The soft soil foundation reinforcing device disclosed by the invention can integrate a pneumatic fracturing pipeline in vacuum pre-pressing with a grouting pipeline and injects high pressure air in a deep soil body by means of the grouting and pressurizing system to increase vacuum gap channels and improve the grouting efficiency, so that the strength of a soft soil foundation can be improved effectively, and therefore, in an actual application, compared with a pure vacuum grouting technology, a much better soil body strength reinforcing effect can be achieved by only increasing a little cost. The grouting pipeline system can be also used repeatedly.

Description

technical field [0001] The invention relates to the field of ultra-soft soil foundation construction, in particular to a soft soil foundation reinforcement device. Background technique [0002] The invention is suitable for the treatment of ultra-soft mud foundations and dredging filling foundations, and belongs to the technical field of civil engineering. [0003] At present, there are many methods applied to soft foundation treatment, and vacuum preloading grouting technology is a relatively new technology in soft foundation reinforcement. Vacuum preloading grouting is divided into vacuum preloading system and grouting system. The vacuum preloading grouting technology is to use the vacuum preloading system to extract the pore water of the soft foundation before treating the soft foundation, so that a series of vacuum void channels are formed in the soft foundation. , and then use the grouting system to pour the grout into the soil, and distribute the grout into the soil a...

AI Technical Summary

Problems solved by technology

However, in practice, the vacuum void channel generated by the vacuum preloading system is insufficient, especially in the case of low permeability coefficient of soft soil, it is difficult to form the void channel, which brings difficulties to grouting and reduces the reinforcement effect of soft soil

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