A quick-setting grout grouting consolidation system and its application method

Abstract

The invention discloses a quick-setting grout grouting consolidation system and a method for using the same. The quick-setting grout grouting consolidation system includes: a grouting pump; a high-pressure pipeline, and the high-pressure pipeline is connected to the grouting pump; Tunnel drilling rig, the tunnel drilling rig is connected with the high-pressure pipeline; outer flat drilling rod, the outer flat drilling rod is fixedly connected with the tunnel drilling rig; sealing device, the sealing device is set on the drilling hole The outer flat drill pipe is used to ensure the sealing between the outer flat drill pipe and the drilling hole; the two-way rib jet grouting drill bit is connected with the outer flat drill pipe by the two-way rib jet grouting; The grouting pump sprays quick-setting grout into the static pressure of the tunnel through the injection rib bit, and the tunnel drilling rig drives the injection rib bit to rotate through the outer flat drill rod. Through the injected slurry and the rotation of the rib, Cutting eliminates the lost block or re-squeezes the lost block into the hole wall to realize the repair of the hole wall.

Description

technical field [0001] The invention relates to a non-lifting anti-collapse grouting consolidation system and its safe operation process in boreholes in loose, weak and broken strata, and belongs to the fields of tunnel and underground engineering drilling and surrounding rock grouting reinforcement in mines, transportation, water conservancy and hydropower. Background technique [0002] At present, in the construction of mines, tunnels and underground projects, we often encounter unfavorable geological environments that are loose, weak, broken, or even rich in water, and surrounding rock deformation, collapse, and even geological disasters such as water and mud inrush often occur. In the treatment of geological disasters, grouting reinforcement must be carried out on unfavorable geological bodies through grouting drilling. However, in the construction of grouting drilling, borehole diameter shrinkage, hole wall collapse, and hole wall instability such as block falling in th...

AI Technical Summary

Problems solved by technology

During the drilling process, the drill bit can only be pushed forward and rotated in the collapsed block hole, but cannot be pulled back; once the hole wall shrinks or falls between the drill pipe and the hole wall above the drill bit, In the event of a drilling tool being jammed accident, due to the lack of upward and side cutting edges, it is difficult for this type of drill to eliminate the shrinkage of the hole wall above the drill bit or collapse and block, and it is difficult to smoothly lift the drilling tool out of the hole

[0005] 2. The nozzles of traditional drill bits are all set at the bottom of the drill bit, and it is difficult to consolidate the hole wall by spraying grouting slurry. Even if the nozzle grouting is performed through the nozzle body on the drill bit, the slurry can only be sprayed towards the bottom of the drill bit, and it is difficult to spray to the side And upper spraying, the spraying is not targeted and uneven, and the effect of spraying reinforcement on loose and broken surrounding rock is poor

[0006] 3. Due to the short solidification time of the quick-setting slurry, the operation process is complicated, and the safety risk is high. When the traditional drilling tools are in use, once the drill bit is stuck and the drill is dropped, the drill bit cannot be pulled back, so it is impossible to stop at the initial setting time of the slurry. Complete the treatment of the accident within the time limit, resulting in the solidification of the quick-setting slurry and the consolidation of the drill bit and the hole wall, resulting in more difficult engineering accidents

Therefore, quick-setting grout cannot be used during grouting, and the grout with a waiting time of 72 hours is selected, which greatly delays the construction progress

Images