A ground reinforcement method

Abstract

The invention relates to a foundation reinforcement method, comprising the following steps: (1) Drilling a foundation hole, inserting the lower end of a flower tube with several holes evenly distributed on the pipe wall into the foundation hole, filling the lower part of the foundation hole with coarse sand and then compacting it; (2) ) Inject water glass solution and cement slurry into the bottom of the flower tube through the first inner sleeve, and wait for the bottom of the flower tube to solidify in the foundation hole; (3) Ream the upper part of the foundation hole to form an enlarged hole, and then inject The grout discs are set equidistantly and sequentially on the part of the flower tube located in the enlarged hole; (4) Fill the enlarged hole with coarse sand; (5) Pump the high-pressure water glass solution into each grouting disc sequentially through the second inner casing , the water glass solution scours and diffuses outward through the grouting pipe, and then pulls out the second inner sleeve; (6) Inject cement slurry into the floral tube, part of the cement slurry diffuses outward through the grouting pipe to contact the water glass solution, and the other part Directly enter the coarse sand in the enlarged hole through the hole on the flower tube, and the work is completed after the cement slurry solidifies.

Description

technical field [0001] The invention relates to a ground reinforcement method. Background technique [0002] There is an existing foundation reinforcement technology, such as the patent number "201610488648.7", and the name is "ground reinforcement device and foundation reinforcement method". Concrete can effectively reinforce the foundation; but in the implementation, the positioning of the grouting plate in this technical solution requires the grouting plate to be moved to the corresponding position, and the elastic pin for positioning is inserted into the positioning hole through the traction rope, which is extremely difficult to operate. Inconvenient, first of all, the grouting disc needs an additional position, and if there is interference between the first traction rope and the second traction rope during this process, the elastic pin will pop out in advance, and this error is irreversible; in addition, during the grouting process, The pressure of the high-pressure gr...

AI Technical Summary

Problems solved by technology

[0002] There is an existing foundation reinforcement technology, such as the patent number "201610488648.7", and the name is "ground reinforcement device and foundation reinforcement method". Concrete can effectively reinforce the foundation; but in the implementation, the positioning of the grouting plate in this technical solution requires the grouting plate to be moved to the corresponding position, and the elastic pin for positioning is inserted into the positioning hole through the traction rope, which is extremely difficult to operate. Inconvenient, first of all, the grouting disc needs an additional position, and if there is interference between the first traction rope and the second traction rope during this process, the elastic pin will pop out in advance, and this error is irreversible; in addition, during the grouting process, The pressure of the high-pressure grout on the elastic pin may make it overcome the elastic force and move the grouting plate; and the original state of the elastic pin relies on the arc baffle to limit the position, and the arc baffle forms a large impact on the grout during the grouting process. resistance and will cause the grout to produce a circulating flow that is not conducive to grouting in the grouting plate, which is not conducive to the outward diffusion of the grout, and it is difficult to produce the so-called cross-linking effect; finally, since the grouting operation is only limited to the outward through the grouting plate Diffusion to achieve the so-called cross-linking effect. There is no slurry in the column of coarse sand accumulation, so that the column as the reinforcement core is not stable. Therefore, even if the local cross-linking effect is strong, the resistance to pressure and shear force still less effective

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