CN117646634B - Broken surrounding rock staged grouting reinforcement device and method - Google Patents
Broken surrounding rock staged grouting reinforcement device and method Download PDFInfo
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- CN117646634B CN117646634B CN202410114558.6A CN202410114558A CN117646634B CN 117646634 B CN117646634 B CN 117646634B CN 202410114558 A CN202410114558 A CN 202410114558A CN 117646634 B CN117646634 B CN 117646634B
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- 239000011435 rock Substances 0.000 title claims abstract description 47
- 238000000034 method Methods 0.000 title claims abstract description 26
- 230000002787 reinforcement Effects 0.000 title claims abstract description 21
- 239000002002 slurry Substances 0.000 claims abstract description 207
- 238000009792 diffusion process Methods 0.000 claims abstract description 91
- 239000000463 material Substances 0.000 claims abstract description 11
- 239000011440 grout Substances 0.000 claims description 26
- 230000005540 biological transmission Effects 0.000 claims description 10
- 229920000642 polymer Polymers 0.000 claims description 7
- 238000005192 partition Methods 0.000 claims description 6
- 230000000630 rising effect Effects 0.000 claims description 5
- 229920002521 macromolecule Polymers 0.000 abstract description 3
- 239000002699 waste material Substances 0.000 abstract description 3
- 230000000903 blocking effect Effects 0.000 abstract description 2
- 238000010276 construction Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 230000003014 reinforcing effect Effects 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 208000008918 voyeurism Diseases 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V8/00—Prospecting or detecting by optical means
- G01V8/10—Detecting, e.g. by using light barriers
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/04—Lining with building materials
- E21D11/10—Lining with building materials with concrete cast in situ; Shuttering also lost shutterings, e.g. made of blocks, of metal plates or other equipment adapted therefor
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/04—Lining with building materials
- E21D11/10—Lining with building materials with concrete cast in situ; Shuttering also lost shutterings, e.g. made of blocks, of metal plates or other equipment adapted therefor
- E21D11/105—Transport or application of concrete specially adapted for the lining of tunnels or galleries ; Backfilling the space between main building element and the surrounding rock, e.g. with concrete
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- Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Architecture (AREA)
- Mining & Mineral Resources (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Civil Engineering (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Geophysics (AREA)
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
Abstract
The invention belongs to the technical field of surrounding rock large deformation control, and discloses a device and a method for grouting reinforcement of broken surrounding rock in stages. The diffusion holes of the slurry diffusion pipe are additionally provided with macromolecule degradable material seals, so that slurry is prevented from leaking out to seal the slurry diffusion holes in the conveying process. The slurry diffusion pipe is internally provided with a slurry stopping limiter for realizing staged grouting, the outer wall of the slurry diffusion pipe is provided with a buckle for limiting the position of the slurry stopping limiter, the slurry stopping limiter is contracted and expanded, and the outer buckle is externally arranged, so that the slurry stopping limiter can be timely adjusted, the precise staged grouting is realized, and repeated grouting and slurry waste are reduced. The lower surface of the slurry stop limiter is provided with a slurry wireless sensing device, so that a slurry diffusion signal is timely obtained, and slurry is prevented from accumulating and blocking in a slurry diffusion pipe.
Description
Technical Field
The invention relates to the technical field of surrounding rock large deformation control, in particular to a device and a method for grouting reinforcement of broken surrounding rock in stages.
Background
With the rapid development of underground engineering, the underground engineering gradually develops to deep engineering and complicated condition underground space engineering, and deep geological environments such as high stress and weak broken surrounding rock are more and more complicated. The problem of surrounding rock large deformation is one of the main problems puzzling underground space construction, and at present, the weak broken layer of the surrounding rock is reinforced by grouting, so that the strength and the rigidity of the surrounding rock structural surface of a roadway are improved.
The existing technology is difficult to effectively realize accurate staged grouting in the grouting process, lacks efficient and accurate staged grouting devices, has the conditions of multiple grouting and repeated grouting, is extremely easy to cause the waste of grout, has low grouting pressure, cannot timely diffuse the grout into surrounding rock to cause the condition of grout blockage and the like, cannot guarantee grouting effect, and influences surrounding rock reinforcing quality and construction progress.
Disclosure of Invention
The invention aims to overcome the defects in the prior art, and provides a device and a method for reinforcing broken surrounding rock by stages grouting, which can accelerate slurry diffusion, improve grouting quality and simplify construction flow.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
the invention provides a staged grouting reinforcement device for broken surrounding rock, which comprises a slurry conveying pipe, a wind pressure conveying pipe, a porous flange plate and a slurry diffusion pipe, wherein the surface of the porous flange plate is provided with pipe holes with different diameters and used for being connected with slurry diffusion pipes with different diameters, a slurry stopping limiter used for realizing staged grouting is arranged in the slurry diffusion pipe, a slurry wireless sensing device is arranged on a first end surface of the slurry stopping limiter, which is close to a grouting side, and a second end surface of the slurry stopping limiter opposite to the first end surface is connected with a pull rod; the outer wall of the slurry diffusion pipe is provided with a buckle for limiting the position of the slurry stop limiter, and the slurry conveying pipe and the air pressure conveying pipe are inserted from one end of the slurry diffusion pipe and pass through the slurry stop limiter.
Further, the wind pressure conveying pipe is connected with the pneumatic grouting pump, continuous air inlet is achieved, the slurry is guaranteed not to solidify in the slurry diffusion pipe when all the slurry flows out, and the slurry diffusivity is improved.
Further, the surface of the slurry diffusion pipe is uniformly distributed with slurry diffusion holes in equal size, and the surfaces of the diffusion holes are all sealed by polymer degradable materials, so that slurry can be effectively prevented from flowing out from the slurry conveying pipe to block the slurry diffusion holes in the slurry flowing process, and when the grouting pressure reaches a certain value, the slurry breaks through the polymer degradable materials and is diffused into surrounding rocks.
Further, the grout stop limiter is of an annular contractible and expandable structure, the pull rod is arranged in the center of the grout stop limiter, and the grout stop limiter is controlled by rotating the pull rod.
Further, the grout stop limiter comprises a reducing transmission rod and a rotating gear arranged on the pull rod, a plurality of first sliding rails distributed along the circumferential direction of the rotating gear are arranged on the rotating gear, the reducing transmission rod is connected with a rotating screw rod, the rotating screw rod is inserted on the first sliding rail, and the tail end of the reducing transmission rod is connected with an arc-shaped attaching piece.
When the slurry stopping limiter is pulled up in the slurry diffusion pipe, the pull rod is rotated clockwise to enable the slurry stopping limiter to shrink so as to prevent the slurry stopping limiter from being blocked in the slurry diffusion pipe and being incapable of sliding in the rising process, when the slurry stopping limiter reaches a specific position, the pull rod is rotated anticlockwise so as to enable the slurry stopping limiter to expand, and the pull rod is completely attached to the inner wall of the slurry diffusion pipe so as to prevent slurry from flowing back.
Further, the slurry wireless sensing device is a continuous infrared signal sensing device which is communicated with a signal receiver;
in the grouting process, the slurry wireless sensing device continuously sends out signals downwards in the slurry diffusion pipe, and if the signals are sent out, the slurry is detected to be accumulated in the slurry diffusion pipe for a continuous time, and the signals are returned to the signal receiver. And if the signal receiver receives a return signal in the continuous time, the signal receiver indicates that the grouting of the section of surrounding rock is completed, and the next-stage grouting work is carried out.
Further, the buckle consists of two clamping pieces, a spring and a fixing rod; the two clamping pieces are V-shaped and arranged at the diffusion holes at the two sides, one ends of the two clamping pieces are connected by a fixing rod, and the middle positions of the two clamping pieces are connected by a spring. When the slurry stop limiter is contacted with the two clamping pieces in the rising process, the pull rod is rotated anticlockwise to enable the slurry stop limiter to expand and squeeze the clamping pieces to force the spring to lose efficacy, so that the two clamping pieces are attached to the inner wall of the slurry diffusion tube.
Further, the buckle is made of a high-molecular degradable material, and the setting position of the buckle on the slurry diffusion pipe is determined by surrounding rock partition results; wherein the macromolecule degradable material can be degraded when meeting water, and does not need to be recovered, thus not polluting the environment; and then determining different grouting parameters according to different lithology to perform staged grouting.
Further, the grouting device further comprises an assembled movable fixing structure, wherein the assembled movable fixing structure is connected with the porous flange plate and used for fixing the whole grouting device during grouting, and the grouting device is prevented from moving due to overlarge pressure in the grouting process so as to influence grouting quality.
In a second aspect, the invention also provides a grouting method of the broken surrounding rock staged grouting reinforcement device, which comprises the following steps:
step one: according to the surrounding rock partition result, installing buckles at the corresponding positions of the slurry diffusion pipe, connecting the slurry conveying pipe and the wind pressure conveying pipe with the slurry stopping limiter, placing the slurry stopping limiter in the slurry diffusion pipe and fixing the slurry stopping limiter, connecting the slurry diffusion pipe with the porous flange plate, and extending the slurry diffusion pipe into grouting surrounding rock;
step two: connecting the slurry wireless sensing device with a signal receiver; connecting a slurry conveying pipe and a wind pressure conveying pipe with a pneumatic grouting pump, opening wind pressure to continuously inject wind into a slurry diffusion pipe until the grouting is finished, and closing the wind pressure;
step three: the slurry outlet of the pneumatic grouting pump is opened to start grouting, the bottommost part sequentially performs grouting upwards, when the slurry wireless sensing device receives a signal, the pull rod is rotated clockwise to enable the slurry stopping limiter to shrink and simultaneously pull upwards, when the slurry stopping limiter contacts with the buckle, the pull rod is rotated anticlockwise to enable the slurry stopping limiter to expand and squeeze the buckle, then grouting at the stage is performed, if a signal receiver returns to the signal in a continuous time, the completion of grouting of surrounding rock at the stage is indicated, and grouting at the next stage is performed; this step is repeated until the grouting of the grouting hole is completed.
Compared with the prior art, the invention has the beneficial effects that:
1. the wind pressure conveying pipe is additionally arranged in the invention, so that the slurry can be fully diffused after being conveyed to the slurry diffusion pipe, and the slurry is prevented from being solidified and blocked in the slurry diffusion pipe, and the grouting reinforcement quality is prevented from being influenced; meanwhile, the retractable expansion grout stop limiter and the external buckle are added in the grout diffusion pipe, so that the grout stop limiter can be adjusted in time, accurate staged grouting is realized, and repeated grouting and grout waste are reduced. In the invention, the wireless sensing device for the slurry is additionally arranged at the bottom of the slurry stopping limiter, so that the slurry diffusion signal is timely acquired, and the slurry is prevented from accumulating and blocking in the slurry diffusion pipe.
2. In the invention, the macromolecule degradable material seal is additionally arranged at the diffusion hole of the slurry diffusion pipe, so that the slurry is prevented from leaking out to seal the slurry diffusion hole in the conveying process.
3. The invention is additionally provided with the assembled movable fixing structure, improves the stability of the grouting device, and prevents the grouting device from being displaced due to overlarge grouting pressure in the grouting process so as to influence the grouting quality.
Drawings
FIG. 1 is a schematic diagram of a broken surrounding rock staged grouting reinforcement device;
FIG. 2 is a schematic diagram of the overall construction of the grouting device;
FIG. 3 is a perspective view of the internal structure of the grouting device;
FIG. 4 is a block diagram of a stop washer;
FIG. 5 is a partial schematic view of a stop washer clasp;
FIG. 6 is a schematic diagram of a slurry wireless sensing device;
the device comprises a 1-knob, a 2-pull rod, a 3-slurry conveying pipe, a 4-wind pressure conveying pipe, a 5-porous flange plate, a 6-slurry diffusion pipe, a 7-assembled movable fixing structure, an 8-buckle, a 9-slurry stopping limiter, a 10-first clamping piece, an 11-fixing rod, a 12-second clamping piece, a 13-spring, a 14-signal receiving instrument, a 15-slurry wireless sensing device, 16-slurry, a 17-surrounding rock slurry reinforcing area, a 18-reducing rotating shaft, a 19-small diameter part, a 20-large diameter part, a 21-rotating gear, a 22-rotating screw, a 23-reducing transmission rod, a 24-first sliding rail, a 25-arc fitting piece and a 26-second sliding rail.
Detailed Description
It should be noted that the following detailed description is illustrative and is intended to provide further explanation of the invention. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the present invention. As used herein, the singular forms also are intended to include the plural forms unless the present invention clearly dictates otherwise, and furthermore, it should be understood that when the terms "comprise" and/or "include" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof;
as shown in fig. 1 to 6, the broken surrounding rock staged grouting reinforcement device provided by the embodiment comprises a slurry diffusion tube 6, a slurry conveying tube 3, a wind pressure conveying tube 4, a porous flange 5, and holes with different diameters on the surface of the porous flange 5, wherein the holes are used for connecting the slurry diffusion tubes 6 with different diameters, a slurry stopping limiter 9 used for realizing staged grouting is arranged in the slurry diffusion tube 6, a buckle 8 used for limiting the position of the slurry stopping limiter 9 is arranged on the outer wall of the slurry diffusion tube 6, a slurry wireless sensing device 15 is arranged on the lower surface of the slurry stopping limiter 9, the slurry wireless sensing device 15 is communicated with a signal receiver 14, and a movable fixing structure 7 is assembled on the porous flange 5.
The slurry conveying pipe 3 is connected with the pneumatic grouting pump to convey slurry into the slurry diffusion pipe 6, the wind pressure conveying pipe 4 is connected with the pneumatic grouting pump to continuously convey wind pressure into the slurry diffusion pipe 6, the slurry 16 is ensured to be fully diffused, the slurry 16 is prevented from being solidified in the slurry diffusion pipe 6, the slurry conveying pipe 3 and the wind pressure conveying pipe 4 both penetrate through the slurry stopping limiter 9, and slide along with the slurry stopping limiter 9; in this embodiment, the slurry feed pipe 3 and the wind pressure feed pipe 4 are coaxially arranged and parallel to each other.
Further, the outer surface of the slurry diffusion tube 6 is provided with equidistant slurry 16 diffusion holes, and each slurry 16 diffusion hole is sealed by a polymer degradable material, so that slurry 16 is prevented from leaking out of the slurry conveying tube 3 in the conveying process, the slurry 16 diffusion holes are blocked to influence the slurry 16 diffusion, and when a certain grouting pressure is reached, the slurry 16 can break through the polymer degradable material to seal through the slurry 16 diffusion holes.
Further, a slurry wireless sensing device 15 is installed at the bottom of the slurry stopping limiter 9, in the grouting process, the slurry wireless sensing device 15 sends a signal downwards along the slurry conveying pipe 3, if the flowing substances in the slurry conveying pipe 3 are monitored in a continuous time, the condition that the diffusion of the section of surrounding rock slurry 16 is slow is indicated, the grouting is about to be completed, the signal is transmitted to the handheld signal receiver 14, and the slurry stopping limiter 9 is started to move upwards. The grout stop limiter 9 can shrink and expand, in order to prevent the grout stop limiter 9 from being blocked in the grout diffusion pipe 6 in the upward moving process, the pull rod 2 is rotated clockwise to enable the grout stop limiter 9 to shrink and simultaneously pull up, when the grout stop limiter 9 contacts the first clamping piece 10 and the second clamping piece 12, the pull rod 2 is rotated anticlockwise to enable the grout stop limiter 9 to expand and extrude the first clamping piece 10 and the second clamping piece 12, the grout stop limiter 9 is completely attached to the inner wall of the grout diffusion pipe 6, and staged grouting is performed.
Further, the buckle 8 is arranged at the diffusion hole of the slurry diffusion pipe 6, and the buckle 8 is composed of a first clamping piece 10, a second clamping piece 12, a spring 13 and a fixing rod 11; the two first clamping pieces 10 and the second clamping pieces 12 are V-shaped and are arranged at the diffusion holes on the two sides, one ends of the two first clamping pieces 10 and the second clamping pieces 12 are connected by the fixing rod 11, the middle positions of the two first clamping pieces 10 and the second clamping pieces 12 are connected by the spring 13, when the grout stop limiter 9 is contacted with the second clamping pieces 12 on the lower end in the rising process, the pull rod 2 is rotated anticlockwise to enable the grout stop limiter 9 to expand and extrude the first clamping pieces 10 and the second clamping pieces 12 to force the spring 13 to lose efficacy, and the clamping pieces on the two ends are attached to the inner wall of the grout diffusion pipe 6.
Further, the buckle 8 is made of a polymer degradable material, can be degraded when meeting water, does not need to be recycled, and cannot pollute the environment.
Further, the setting position of the buckle 8 is determined by surrounding rock partition results, and different grouting parameters are determined according to different lithology so as to require the development of staged grouting.
Further, as shown in fig. 4 and 5, the grout stop limiter 9 comprises a rotary screw 22 and a rotary gear 21 mounted on the pull rod 2, wherein a plurality of arc-shaped first sliding rails 24 distributed along the circumferential direction of the rotary gear 21 are arranged on the rotary gear 21, the rotary screw 22 is connected with a reducing transmission rod 23, the rotary screw 22 is inserted on the arc-shaped first sliding rails 24, the tail end of the rotary screw 22 is connected with an arc-shaped laminating piece 25, and in fig. 4, the first sliding rails 24 comprise a small diameter part 19 and a large diameter part 20;
further, when the slurry stopping limiter 9 is pulled up in the slurry diffusion tube 6, the pull rod 2 is rotated clockwise to enable the slurry stopping limiter 9 to shrink so as to prevent the slurry stopping limiter 9 from being blocked in the slurry diffusion tube 6 and sliding in the rising process, when the slurry stopping limiter 9 reaches a specific position, the pull rod 2 is rotated anticlockwise so as to enable the slurry stopping limiter 9 to expand and completely fit the inner wall of the slurry diffusion tube 6, and therefore the slurry 16 is prevented from flowing back.
As shown in fig. 5, after the pull rod 2 is rotated, the reducing rotation shaft 18 drives the rotation gear 21 to rotate. After the rotating gear 21 starts to rotate, the rotating screw 22 starts to slide in the first sliding rail 24, and the rotating screw 22 and the reducing transmission rod 23 are integrated, so that the rotating screw 22 drives the reducing transmission rod 23 to slide outwards along the second sliding rail 26, the arc-shaped attaching piece 25 is pushed to move outwards, and when the rotating screw 22 moves from one end to the other end in the first sliding rail 24, the diameter of the grout stop limiter 9 is increased.
Further, the arc-shaped fitting member 25 in the present embodiment has a segment structure.
Further, a knob 1 is also arranged at the end part of the pull rod 2.
Further, the slurry conveying pipe 3 and the wind pressure conveying pipe 4 extend into the slurry diffusion pipe 6, pass through the slurry stopping limiter 9, and are completely attached to the slurry stopping limiter 9 without gaps.
The grouting method of the broken surrounding rock staged grouting reinforcement device of the invention is further described below with reference to fig. 1-6, and the concrete operation method of the method is based on the broken surrounding rock staged grouting reinforcement device.
Step one: according to the surrounding rock partition result, the buckles 8 are arranged at the corresponding positions of the slurry diffusion pipe 6, the slurry conveying pipe 3, the wind pressure conveying pipe 4 and the slurry stopping limiter 9 are connected, the slurry stopping limiter 9 is arranged in the slurry diffusion pipe 6 and fixed, the slurry diffusion pipe 6 is connected with the porous flange plate 5 and extends into grouting surrounding rock, and the assembled movable fixing structure 7 is adjusted.
Step two: the slurry wireless sensing device 15 is connected with the signal receiver 14; the slurry conveying pipe 3, the wind pressure conveying pipe 4 and the pneumatic grouting pump are connected, wind pressure is opened to continuously inject wind into the slurry diffusion pipe 6 until the grouting is finished, and the wind pressure is closed.
Step three: the outlet of the pneumatic grouting pump slurry 16 is opened to start grouting, the bottommost part sequentially performs grouting upwards, when the slurry wireless sensing device 15 receives a signal, the pull rod 2 is rotated clockwise to enable the slurry stopping limiter 9 to shrink and simultaneously pull upwards, when the slurry stopping limiter 9 contacts the first clamping piece 10 and the second clamping piece 12, the pull rod 2 is rotated anticlockwise to enable the slurry stopping limiter 9 to expand and squeeze the first clamping piece 10 and the second clamping piece 12, grouting in the next stage is performed, and the step is repeated until grouting of the grouting hole is completed; referring specifically to fig. 1 and 6, during grouting, the slurry wireless sensor 15 continuously sends out a signal downwards in the slurry diffusion tube 6, and if the signal is sent out, the slurry 16 is accumulated in the slurry diffusion tube 6 for a continuous time, the signal is returned to the signal receiver 14.
Further, if the signal receiver 14 receives a return signal in a continuous time, it indicates that the grouting of the surrounding rock is completed, and then the grouting work of the next stage is performed.
Step four: after grouting is finished, firstly closing the outlet of the slurry 16, then closing the wind pressure outlet, moving out of grouting equipment, and performing grouting operation of the next grouting hole; the concrete post grouting reinforcement zone is referred to as the surrounding rock slurry reinforcement zone 17 in fig. 1.
Further, the grouting amount of the grouting holes Wherein R is the slurry diffusion radius, d is the center distance of the slurry diffusion tube 6, k is the effective length of the slurry diffusion tube 6, +.>Is the porosity of the rock mass.
Further, by in-situ pre-grouting test, the slurry 16 diffusion condition is peeped by a high-definition peeping instrument, and the slurry diffusion hole radius R is determined.
Finally, it is pointed out that relational terms such as first and second are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions.
Claims (8)
1. The broken surrounding rock staged grouting reinforcement device is characterized by comprising a slurry conveying pipe, a wind pressure conveying pipe, a porous flange plate and a slurry diffusion pipe, wherein the surface of the porous flange plate is provided with pipe holes with different diameters and used for being connected with slurry diffusion pipes with different diameters, a slurry stopping limiter used for realizing staged grouting is arranged in the slurry diffusion pipe, a first end face, close to a grouting side, of the slurry stopping limiter is provided with a slurry wireless sensing device, and a second end face, opposite to the first end face, of the slurry stopping limiter is connected with a pull rod; the outer wall of the slurry diffusion pipe is provided with a buckle for limiting the position of the slurry stop limiter, and the slurry conveying pipe and the air pressure conveying pipe are inserted from one end of the slurry diffusion pipe and penetrate through the slurry stop limiter; the slurry wireless sensing device is communicated with the signal receiver;
the grout stop limiter is of an annular contractible and expandable structure, and the pull rod is arranged at the center of the grout stop limiter;
the buckle consists of two clamping pieces, a spring and a fixing rod; the setting position of the buckle on the slurry diffusion pipe is determined by surrounding rock partition results;
the two clamping pieces are arranged at the diffusion holes at the two sides in a V shape, one ends of the two clamping pieces are connected by a fixed rod, and the middle positions of the two clamping pieces are connected by a spring;
when the slurry stop limiter is contacted with the two clamping pieces in the rising process, the pull rod is rotated anticlockwise to enable the slurry stop limiter to expand and squeeze the clamping pieces to force the spring to lose efficacy, so that the two clamping pieces are attached to the inner wall of the slurry diffusion tube;
and if the signal receiver receives a return signal in the continuous time, the signal receiver indicates that the grouting of the section of surrounding rock is completed, and the next-stage grouting work is carried out.
2. The broken surrounding rock staged grouting reinforcement device according to claim 1, wherein the wind pressure conveying pipe is connected with a pneumatic grouting pump to realize continuous air intake.
3. The broken surrounding rock staged grouting reinforcement device according to claim 1, wherein slurry diffusion holes are uniformly distributed on the surface of the slurry diffusion pipe, and the surfaces of the slurry diffusion holes are sealed by polymer degradable materials.
4. The grouting reinforcement device for broken surrounding rock according to claim 1, wherein the grouting limiter comprises a reducing transmission rod and a rotating gear arranged on the pull rod, a plurality of first sliding rails distributed along the circumference of the rotating gear are arranged on the rotating gear, the reducing transmission rod is connected with a rotating screw rod, the rotating screw rod is inserted on the first sliding rail, and the tail end of the reducing transmission rod is connected with an arc fitting piece.
5. The broken surrounding rock staged grouting reinforcement device of claim 1, wherein the slurry wireless sensing device is a continuous infrared signal sensing device.
6. The broken surrounding rock phased grouting reinforcement device of claim 1, wherein the clasp is made of a polymer degradable material.
7. The broken wall rock phased grouting reinforcement device of claim 1, further comprising a fabricated movable fixation structure connected to the porous flange.
8. A method for grouting broken surrounding rock in stages, which is characterized in that the method adopts the broken surrounding rock grouting reinforcement device in stages as claimed in any one of claims 1 to 7 for grouting, and comprises the following steps:
step one: according to the surrounding rock partition result, installing buckles at the corresponding positions of the slurry diffusion pipe, connecting the slurry conveying pipe and the wind pressure conveying pipe with the slurry stopping limiter, placing the slurry stopping limiter in the slurry diffusion pipe and fixing the slurry stopping limiter, connecting the slurry diffusion pipe with the porous flange plate, and extending the slurry diffusion pipe into grouting surrounding rock;
step two: connecting the slurry wireless sensing device with a signal receiver; connecting a slurry conveying pipe and a wind pressure conveying pipe with a pneumatic grouting pump, opening wind pressure to continuously inject wind into a slurry diffusion pipe until the grouting is finished, and closing the wind pressure;
step three: the slurry outlet of the pneumatic grouting pump is opened to start grouting, the bottommost part sequentially performs grouting upwards, when the slurry wireless sensing device receives a signal, the pull rod is rotated clockwise to enable the slurry stopping limiter to shrink and simultaneously pull upwards, when the slurry stopping limiter contacts with the buckle, the pull rod is rotated anticlockwise to enable the slurry stopping limiter to expand and squeeze the buckle, then grouting at the stage is performed, if a signal receiver receives a return signal in a continuous time, the completion of grouting of surrounding rock at the stage is indicated, and grouting at the next stage is performed; this step is repeated until the grouting of the grouting hole is completed.
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