| abstract |
The invention discloses a device and a method for directionally solidifying sandy soil by calcium carbonate precipitation induced by microorganisms, wherein the device comprises a drill rod, a first air pipe, a second air pipe, a grouting pipe and a fixed pipe are sequentially arranged in the drill rod from inside to outside, a plurality of second telescopic pipes are also arranged on the outer wall of the circumference of the drill rod, a plurality of first grout outlet holes are also arranged on the outer wall of each second telescopic pipe, a first telescopic pipe is also arranged in each second telescopic pipe, an unlocking block is arranged at one end of each first telescopic pipe, a moving plate is also arranged in each fixed pipe, and the first air pipe is connected with the moving plate; still be equipped with a plurality of retaining members in the drilling rod, the retaining member can be fixed the circular cone head on the circumference outer wall of drilling rod. According to the invention, the second telescopic pipe is arranged, so that the microorganism grouting curing range can be enlarged, accurate directional curing of any soil region can be realized, the soil curing efficiency is improved, and the second telescopic pipe falls off from the drill rod after the microorganism curing of the soil is completed, so that the loosening influence on the cured soil is avoided. |