Grouting system and method for directional reinforcement of tunnel

Abstract

The invention discloses a grouting system and method for directional reinforcement of a tunnel. Comprising a drill rod, an unfolding drilling mechanism is arranged on one side of the drill rod, the unfolding drilling mechanism comprises a main arm, an auxiliary arm, a main ring and an auxiliary ring, the main arm is rotationally arranged on one side of the drill rod, the auxiliary arm is rotationally arranged at the top of the drill rod, an unfolding frame is slidably arranged on the outer surface of the drill rod, and a corresponding ring is arranged at the bottom of the unfolding frame. A gas transmission mechanism is arranged in the drill rod, a main ring and an auxiliary ring are driven by a push rod to operate together, the positions of a main arm and an auxiliary arm can be adjusted, a grouting hole is machined in the main arm and the auxiliary arm, the grouting hole is provided with an upper ring shape and a lower ring shape, and the two ring shapes of the grouting hole are communicated, so that the grouting reinforcement effect can be achieved; and circulation of internal grouting is guaranteed, and an unfolding frame is arranged and can serve as a reinforcing rib.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of tunnel reinforcement, in particular to a grouting system and method for directional reinforcement of a tunnel. BACKGROUND

[0002] When constructing a tunnel, tunnel excavation work needs to be carried out underground, a shield machine needs to be used, and segments need to be laid on the inner wall of the tunnel. After the underground water level rises, the segments will be damaged to some extent, and the segments need to be repaired in a timely manner. The existing grouting system is a punching grouting system, which punches holes in the segments first, and then grouts. The holes punched are also common cylindrical holes, which lack a certain stability, and the grouted segments also lack a certain anti-dropping property. In addition, reinforcing bars cannot be implanted during the drilling process to ensure the strength of the grouted segments. SUMMARY

[0003] Therefore, the technical problem to be solved by the present application is to provide a grouting system and method for directional reinforcement of a tunnel. The main arm and the auxiliary arm are driven to rotate together by the push rod, the positions of the main arm and the auxiliary arm can be adjusted, and a grouting hole with upper and lower annular shapes is machined by the main arm and the auxiliary arm. The two annular shapes of the grouting hole are connected, which can reinforce the grouting.

[0004] To solve the above technical problems, the present application provides the following technical scheme:

[0005] The drill rod is provided with an unfolding drilling mechanism on one side. The unfolding drilling mechanism comprises a main arm, an auxiliary arm, a main ring and an auxiliary ring. The main arm is rotatably arranged on one side of the drill rod. The auxiliary arm is rotatably arranged on the top of the drill rod. An unfolding frame is slidably arranged on the outer surface of the drill rod. A corresponding ring is arranged at the bottom of the unfolding frame. A gas conveying mechanism is arranged in the drill rod. The gas conveying mechanism comprises a fixed capsule, a top capsule, a long rod and a gas conveying channel. The long rod is slidably arranged in the gas conveying channel. The fixed capsule is mounted at the bottom of the drill rod. A control mechanism is arranged in the fixed capsule. The control mechanism comprises a control rod and a control ring. The control rod is slidably arranged in the drill rod. The control rod is provided with the fixed capsule at one end.

[0006] The technical scheme of the present application has the following beneficial technical effects:

[0007] The main arm and the auxiliary arm are driven to run together by the push rod, the position of the main arm and the auxiliary arm can be adjusted, the main arm and the auxiliary arm process a grouting hole, the grouting hole has upper and lower annular shapes, the two annular shapes of the grouting hole are communicated, the grouting hole is reinforced, the circulation of internal grouting is ensured, the expansion frame is arranged, the expansion frame can be used as a reinforcing rib, the top of the expansion frame can be expanded along the upper side after drilling is completed, the edge of the grouting hole is fitted, deformation is carried out, the edge has certain stability after grouting solidifies, and the upper and lower sides can be blocked by the fixed bag and the top bag during the dust removal process, dust is conveniently discharged along the ash discharge channel. BRIEF DESCRIPTION OF DRAWINGS

[0008] Figure 1 A schematic diagram of a drill rod profile structure is shown in the drawings.

[0009] Figure 2 A schematic diagram of a single-sided cutting of a drill rod is shown in the drawings.

[0010] Figure 3 A schematic diagram of a drill rod working is shown in the drawings.

[0011] Figure 4 A schematic diagram of an expansion frame working is shown in the drawings.

[0012] Figure 5 A schematic diagram of a fixed bag middle cutting is shown in the drawings.

[0013] The reference signs in the drawings are as follows: 1, drill rod; 2, main arm; 3, auxiliary arm; 4, main ring; 5, auxiliary ring; 6, expansion frame; 7, corresponding ring; 8, fixed bag; 9, top bag; 10, long rod; 11, gas conveying channel; 12, control rod; 13, control ring; 14, insertion slot; 15, buffer spring; 16, No. 2 strip; 17, No. 1 strip; 18, reset spring; 19, inner slot; 20, inner block; 21, transverse spring; 22, back-and-forth strip; 23, discharge port; 24, extrusion valve; 25, corresponding slot; 26, ash discharge channel; 27, inclined rod; 28, extending rod; 29, main drill bit; 30, push rod. DETAILED DESCRIPTION

[0014] The embodiment provides a grouting system for tunnel directional reinforcement, as shown in the drawings Figure 1As shown, drill rod 1, as a rotating body, can be rotated using existing technology. Drill rod 1 itself cannot rotate; it rotates under the drive of a motor or other equipment. Drill rod 1 cannot exist independently; it is a design element of this scheme, hence the separate display of drill rod 1. The method of mounting drill rod 1 on the instrument is not shown; in actual operation, drill rod 1 needs to be mounted on the instrument. The main arm 2 and auxiliary arm 3 are rotatably mounted on the upper and lower sides of drill rod 1, respectively. Both the main arm 2 and auxiliary arm 3 have teeth on their edges, allowing for rotating and cutting holes. Both the main arm 2 and auxiliary arm 3 can be deployed for drilling. The top of drill rod 1 is the main drill bit 29. The main drill bit 29 rotates towards the tunnel surface to enlarge the hole through the rotation of drill rod 1, allowing the structure below drill rod 1 to enter the rotated hole. This scheme names the rotated hole a grouting hole. The shape of the grouting hole is shown in the appendix of the instruction manual. Figure 4 The following demonstration shows that, in this design, both the main boom 2 and the auxiliary boom 3 can rotate and extend. The extension of both booms relies on the push rod 30. The top of the push rod 30 is fixed inside the drill pipe 1. The top of the push rod 30 (the lifting section; the push rod 30 is a hydraulic push rod in existing technology) has a secondary ring 5 installed at one end. A main ring 4 slides below the secondary ring 5. One side of the secondary ring 5 overlaps with a second strip 16, and the other end of the second strip 16 overlaps with the auxiliary boom 3. Because the rotation center of the auxiliary boom 3 is at the top, retracting the push rod 30 causes the secondary ring 5 to rise, immediately extending the auxiliary boom 3, as shown in the attached instruction manual. Figure 3 As shown, the main ring 4 below the secondary ring 5 has a sliding gap with the secondary ring 5, as per the instruction manual. Figure 2 As shown, below the secondary ring 5 is a long rod 10, which passes through the main ring 4. A corresponding extension bar is provided on the side of the long rod 10, so that the main ring 4 has a certain sliding distance on the surface of the secondary ring 5. When the secondary ring 5 moves upward, the secondary arm 3 unfolds. It does not immediately unfold the main arm 2, but the secondary ring 5 slides on the main ring 4. The unfolding of the main arm 2 is also achieved by the main ring 4 moving upward, which causes the first bar 17 to push the main arm 2 upward. The rotation center of the main arm 2 is at the bottom.

[0015] With the activation of push rod 30, the main boom 2 and auxiliary boom 3 will drill into the tunnel. Figure 3As shown, the rotation range of the main boom 2 is a large cone, named the large annular hole, and the rotation range of the auxiliary boom 3 is a small cone, named the small annular hole. An extension rod 28 is also provided on the auxiliary boom 3. A diagonal rod 27 is mounted on the surface of the extension rod 28. The diagonal rod 27 is a small drill rod 1, and the extension rod 28 is a small hydraulic push rod 30, which allows the diagonal rod 27 to extend downwards. After the main boom 2 and auxiliary boom 3 are in operation, the drill rod 1 is fixed (the rotation control of the drill rod 1 uses a servo motor, which has a power-off self-locking function). At this time, the extension rod 28 is controlled to drive the diagonal rod 27 to extend (the extension rod 28 and diagonal rod 27 are only shown in the instruction manual). Figure 1 The display was placed in the middle, and because the display made it too crowded, the instruction manual was attached. Figure 3 It's unclear, so only the instruction manual is included. Figure 1 It has the capability to drill through the large and small rings, and this channel is called a through hole, as shown in the instruction manual. Figure 4 As shown, drilling has three effects: first, it facilitates ash removal; second, it facilitates grout flow; and third, it makes the grout more stable. These effects will be introduced one by one later.

[0016] Before the main drill bit 29 rotates to the set depth, the push rod 30 needs to be activated once. As mentioned above, activating the push rod 30 immediately deploys the auxiliary boom 3, but not the main boom 2. This design utilizes this deployment process, hence the following is included in the instruction manual. Figure 4 The inner edge of the grouting hole is rotated and cut on one side corresponding to ring 7, as shown in the attached instruction manual. Figure 4 As shown, this corresponds to the final installation position of ring 7, and the effect will be described later.

[0017] Therefore, as this project progresses, the tunnel's internal drilling and access instructions will be attached. Figure 4The grouting hole is shown, at this time the grouting hole is grouted, which can fill the grouting hole, the grouting hole can be filled with a large ring and a small ring to communicate between them, and as the grouting fills the grouting hole, the grouting hole is completely filled. After filling, the following effects are obtained: it is difficult to separate from the grouting hole after the grouting solidifies, and the through hole is connected to the large ring and the small ring, so that the large ring and the small ring are also reinforced and integrated. In this way, the grouting hole is difficult to separate, and the setting of the implantation of the expansion frame 6 in the grouting hole is adopted. The expansion frame 6 is an expandable setting, and the expansion frame 6 cannot be separated from the grouting hole after being implanted into the grouting hole, because the top of the expansion frame 6 is a round rod, and as the main arm 2 expands, the top of the expansion frame 6 can expand outward and cannot be separated from the large ring. Because the material of the expansion frame 6 is steel or a metal with certain plasticity, the drill bit will be separated from the tunnel, which will cause the expansion frame 6 to be separated from the drill bit. The expansion frame 6 is similar to the setting of the steel in the building, which can strengthen the strength of the grouting and ensure the anti-separation of the grouting. A small annular shape is drilled on the edge of the corresponding ring 7, which can correspond to the shape and position of the corresponding groove 25. After grouting, the grouting at the corresponding position can be integrated with the grouting of the corresponding groove 25, which can also be fused with the grouting at this time, achieving the effect of anti-separation.

[0018] As described in the specification Figure 2As shown, in order to make the hole in which the expansion frame 6 can be orderly transported, and to make the position of the expansion frame 6 guaranteed, when drilling, that is, when the gas conveying passage 11 is gas conveying, one end of the gas conveying passage 11 needs to be connected with the air blower or air compressor, and the gas conveying passage 11 blows out the gas. Since the drill rod 1 of the present scheme is rotating, in order to ensure that it can rotate, the air outlet end of the equipment needs to be inserted into the gas conveying passage 11, and the inserted part is provided with a corresponding sealing gasket, which can ensure that the gas conveying passage 11 in the rotating process is ventilated. A fixed bag 8 is arranged on one side of the bottom of the gas conveying passage 11. The material of the fixed bag 8 is inelastic and has a certain strength. The effect of the fixed bag 8 has two, one is that when it is not completely released, it can be fixed to the corresponding ring 7, and after complete release, it can seal the grouting hole. Since the drill rod 1 is rotating, considering the wear of the fixed bag 8 caused by rotation, four control rods 12 are arranged in the fixed bag 8. One end of the control rod 12 is connected to the fixed bag 8. Due to the arrangement of the fixed rod, the fixed bag 8 cannot expand in four directions, and it is also destined to expand in four directions. The four expandable directions just correspond to the positions of the four round rods of the expansion frame 6. Therefore, with the gas conveying of the gas conveying passage 11, the expansion frame 6 will expand towards the four round rods of the expansion frame 6 and contact the corresponding ring 7. Since the shape of the corresponding ring 7 of the present scheme is convex outward, the fixed bag 8 can contact and fix the expansion frame 6 after inflation to prevent it from coming off, so that the expansion frame 6 is difficult to come off the fixed bag 8, thereby achieving the effect of positioning the expansion frame 6. This is the effect of the fixed bag 8. When it is necessary to come off the fixed bag 8, only the gas conveying of the gas conveying passage 11 needs to be stopped, so that the fixed bag 8 can easily shrink and come off the expansion frame 6.

[0019] With the complete drilling of the grouting hole, the control rod 12 on the fixed bag 8 will be automatically released. The control rod 12 is provided with an insertion slot 14 at one end. The surface of the insertion slot 14 is clamped with a control ring 13, so that the control ring 13 can fix the control rod 12. With the upward movement of the control ring 13, the control ring 13 comes off the control rod 12 (as shown in the accompanying drawings). Figure 2When the fixed bag 8 is in the shape of the fixed bag 8, the fixed bag 8 will continue to expand towards the edge until it contacts the grouting hole, and the bottom of the grouting hole is blocked, at this time the drill pipe 1 will stop working, and the gas conveying channel 11 will increase the gas conveying speed, and the gas will be sprayed out of the upper gas outlet 23 (the lower part of the gas outlet 23 will be introduced later), and the gas can be sprayed out of the upper part (at the same time, the top bag 9 will also be ventilated and expanded to block the upper part of the grouting hole), which is helpful for cutting the grouting hole and removing the dust. The upper part of the fixed bag 8 is provided with a dust removal channel 26, which can be provided with a dust removal fan or other equipment, or not provided with a dust removal fan. In this way, the gas will flow out along the dust removal channel 26, and at this time the fixed bag 8 and the top bag 9 will block the interval of the drill hole, and the gas conveying along the gas conveying channel 11 can blow the dust generated during the drilling process. Because the main arm 2 rotates at a certain angle, the gas can be blown to the working interval of the main arm 2 through the through hole to remove the dust. The fixed bag 8 can expand outwardly due to the release of the release rod, or expand towards the edge due to the fixation of the release rod, which can fix the expansion frame 6, so that the expansion frame 6 can enter the grouting hole along the drill pipe 1, and block the lower interval, so that the grouting hole can be blocked during the dust removal process.

[0020] The gas delivery channel 11 connects upwards to the top bladder 9 and upwards to the nozzle 23, and downwards to the fixed bladder 8. The gas delivery channel 11 directly connects to the inside of the fixed bladder 8, but corresponding structures are provided for connecting to the top bladder 9 and the nozzle 23. The structure connecting to the top bladder 9 is a long rod 10, and the structure connecting to the nozzle 23 is a squeeze valve 24. The squeeze valve 24 and the long rod 10 are controlled on the same principle; both open the channel by moving to create misalignment. The long rod 10 is slidably located inside the gas delivery channel 11, and the top of the long rod 10 blocks the channel to the top bladder 9. Only when the long rod 10 moves upwards can the channel to the top bladder 9 be opened. At the same time, the upward movement of the long rod 10 can drive the control ring 13 to move upwards, which also changes the shape of the fixed bladder 8. Therefore, the upward movement of the long rod 10 simultaneously... The shape of the fixed bladder 8 is controlled and connected to the top bladder 9. The long rod 10 is also controlled by the push rod 30. Because a reciprocating bar 22 is integrally set on the upper surface of the secondary ring 5, the upper part of the reciprocating bar 22 is a slope, and the middle part is set with an opening to form a misalignment with the left side of the inner block 20. However, the upward movement of the reciprocating bar 22 can make the inner block 20 disengage from the inner groove 19. Because one side of the inner block 20 is cylindrical, the upper side of the reciprocating bar 22 just moves upward to push against one side of the cylinder, making the cylinder move to the left. One side of the inner block 20 overlaps with the inner groove 19. Once the inner groove 19 disengages from the inner block 20, it will return to its original position under the action of the return spring 18. The bottom of the return spring 18 is connected to the long rod 10, and the top of the return spring 18 is connected to the inside of the air supply channel 11. The instruction manual is attached. Figure 3 When the return spring 18 is in a stretched state, its release will cause the long rod 10 to move upward. The upward movement of the long rod 10 will naturally cause the control ring 13 to disengage from the control rod 12, as per the instruction manual. Figure 1 When the secondary ring 5 moves downward, it causes the right side of the reciprocating bar 22 to move the long rod 10 downward, because one side of the long rod 10 extends through the air supply channel 11 towards one side of the reciprocating bar 22 (therefore, an opening is provided on one side of the air supply channel 11, as shown in the instruction manual). Figure 1 As shown, a sealing plate needs to be installed on the inner side of the opening to ensure the air supply channel 11 remains sealed even if the long rod 10 slides. This allows the reciprocating bar 22 to move downwards, driving the long rod 10 downwards. A buffer spring 15 is provided on the upper side of the control ring 13, allowing the control ring 13 to slide on the surface of the long rod 10, providing a fault tolerance rate. The control rod 12 is reattached to the control ring 13. Simply retracting the drill rod 1 and sucking out the gas inside the fixing bladder 8 will allow the control rod 12 to reattach to the control ring 13. One side of the control rod 12 has a bevel, and the outer surface of the control ring 13 also has a bevel, as shown in the attached instruction manual. Figure 2 As shown in the enlarged area, this ensures that the two parts can be stably locked together.

[0021] Finally, the extrusion valve 24 is introduced, so that the gas delivery channel 11 in the process of gas delivery can first time inflate the top capsule 9 and the fixed capsule 8 (at this time the drill pipe 1 is not in rotation, the last paragraph introduced the sub ring 5 upward movement to control the internal block 20 to move to the left side, the lateral spring 21 is arranged on one side of the internal block 20, the lateral spring 21 can reset the internal block 20, the lateral spring 21 has a pressure sensor, the pressure represents the completion of the work of the main arm 2 and the sub arm 3, at this time the motor is controlled to make the drill pipe 1 not rotate), so a sliding extrusion valve 24 is arranged at the outlet 23, a spring is arranged on one side of the extrusion valve 24 to support, so the strength of the input gas needs to be strong enough to make the extrusion valve 24 continue to move to the left side, and the fixed capsule 8 and the top capsule 9 are very easy to enter the gas, so the gas delivery channel 11 of the present scheme will enter the fixed capsule 8 and the top capsule 9 first (in the case of opening of the top capsule 9), so that in the process of blowing ash, the top and the fixed capsule 8 will be inflated to block the upper and lower grouting holes.

[0022] The side of the drill rod 1 is provided with an unfolding drilling mechanism, the unfolding drilling mechanism comprises a main arm 2, an auxiliary arm 3, a main ring 4 and an auxiliary ring 5, the main arm 2 is rotationally arranged on the side of the drill rod 1, the auxiliary arm 3 is rotationally arranged on the top of the drill rod 1, the outer surface of the drill rod 1 is slidably provided with an unfolding frame 6, the bottom of the unfolding frame 6 is provided with a corresponding ring 7, the inside of the drill rod 1 is provided with a gas conveying mechanism, the gas conveying mechanism comprises a fixed capsule 8, a top capsule 9, a long rod 10 and a gas conveying channel 11, the long rod 10 is slidably arranged in the inside of the gas conveying channel 11, the fixed capsule 8 is installed at the bottom of the drill rod 1, the inside of the fixed capsule 8 is provided with a control mechanism, the control mechanism comprises a control rod 12 and a control ring 13, the control rod 12 is slidably arranged in the inside of the drill rod 1, one end of the control rod 12 is provided with the fixed capsule 8, the gas conveying channel 11 is arranged in the inside of the drill rod 1, one side of the gas conveying channel 11 is communicated with the fixed capsule 8, the top of the gas conveying channel 11 is provided with the top capsule 9, one side of the control rod 12 is provided with an insertion slot 14, the surface of the insertion slot 14 is overlapped with the control ring 13, the control ring 13 is slidably arranged at the bottom of the long rod 10, the control ring 13 and the long rod 10 are provided with a buffer spring 15, one side of the auxiliary arm 3 is rotationally provided with a No. 2 strip 16, one side of the No. 2 strip 16 is hingedly provided with the auxiliary ring 5, one side of the main arm 2 is rotationally provided with a No. 1 strip 17, one side of the No. 1 strip 17 is hingedly provided with the main ring 4, the lower surface of the auxiliary ring 5 is slidably provided with the main ring 4, the upper side of the long rod 10 is provided with a reset spring 18, one side of the long rod 10 is provided with an internal slot 19, one side of the gas conveying channel 11 is slidably provided with an internal block 20, one side of the internal block 20 is inserted into the internal slot 19, the internal block 20 and the gas conveying channel 11 are provided with a transverse spring 21, the upper surface of the auxiliary ring 5 is integrally provided with a back-and-forth strip 22, one side of the gas conveying channel 11 is communicated with a spray outlet 23, one side of the spray outlet 23 is slidably provided with a squeeze valve 24, one side of the squeeze valve 24 is provided with a squeeze spring, the outside of the corresponding ring 7 is provided with a corresponding slot 25, the inside of the drill rod 1 is integrally provided with an ash discharging channel 26, the middle part of the drill rod 1 is provided with an opening, one side of the auxiliary arm 3 is provided with an oblique drilling mechanism, the oblique drilling mechanism comprises an oblique rod 27 and an extending rod 28, the extending rod 28 is installed on one side of the auxiliary arm 3, one end of the extending rod 28 is provided with the oblique rod 27, the upper surface of the drill rod 1 is provided with a main drill bit 29, the inside of the drill rod 1 is provided with a push rod 30, one end of the push rod 30 is provided with the auxiliary ring 5.

[0023] The embodiment provides a grouting method for tunnel directional reinforcement, as shown in the description, Figure 4 The embodiment corresponds to the drilling device function introduced above, the first step is to control the drill rod 1 to drill to obtain a grouting hole and a gas conveying channel 11 to convey gas, the drill rod 1 itself can rotate to drill, and the top of the drill rod 1 is provided with a drill bit, the gas conveying channel 11 first conveys gas to prevent the unfolding frame from being separated from the drill rod 1, and the gas can be sprayed from the spray outlet 23 at the same time;

[0024] Second step, control push rod 30 to retract sub-ring 5, so that sub-arm 3 to expand drill hole to get small ring shape (that is, can correspond with the ring edge structure of expansion frame 6), then control push rod 30 to reset sub-ring 5, drill rod 1 to control push rod 30 to retract sub-ring 5 again, so that sub-arm 3 to expand drill hole to get small ring hole and main arm 2 to delay expansion drill hole to get large ring hole (main arm 2 rotates with drill rod 1 to get large ring hole), while making the top of expansion frame 6 deformed to contact on the large ring hole;

[0025] Third step: stop drill rod 1 to drill, control long rod 10 to move upward to make fixed bag 8 to expand, complete the sealing of the bottom of the grouting hole, while the top bag 9 expands to seal the top of the grouting hole and sprays gas along the outlet 23, so that the dust generated by drilling is discharged along the dust discharge channel 26, control the extension rod 28 to drive the inclined rod 27 to extend the through hole to make the large ring hole and the small ring hole communicate;

[0026] Fourth step: control push rod 30 to reset sub-ring 5 again, remove drill rod 1 and use grouting equipment to grout the grouting hole (the grouting equipment is not shown in this scheme, the grouting equipment belongs to the prior art, so the grouting equipment is not introduced in detail).

[0027] Obviously, the above embodiments are only examples for clear illustration, and are not limited to the embodiments. Based on the above description, other different forms of changes or variations can be made by those skilled in the art. Here, all the embodiments do not need to be exhausted, and the obvious changes or variations derived therefrom are still within the protection scope of the patent application claims.

Claims

1. A grouting system for directional reinforcement of tunnels, characterized in that, The system includes a drill rod (1), on one side of which is a drilling mechanism. The drilling mechanism includes a main arm (2), a secondary arm (3), a main ring (4), and a secondary ring (5). The main arm (2) is rotatably mounted on one side of the drill rod (1), and the secondary arm (3) is rotatably mounted on the top of the drill rod (1). A drilling frame (6) is slidably mounted on the outer surface of the drill rod (1), and a corresponding ring (7) is mounted at the bottom of the drilling frame (6). An air supply mechanism is installed inside the drill rod (1). The gas delivery mechanism includes a fixed bladder (8), a top bladder (9), a long rod (10), and a gas delivery channel (11). The long rod (10) is slidably disposed inside the gas delivery channel (11). The fixed bladder (8) is installed at the bottom of the drill rod (1). A control mechanism is provided inside the fixed bladder (8). The control mechanism includes a control rod (12) and a control ring (13). The control rod (12) is slidably disposed inside the drill rod (1). The fixed bladder (8) is installed at one end of the control rod (12).

2. The grouting system for directional reinforcement of tunnels according to claim 1, characterized in that, The gas supply channel (11) is located inside the drill rod (1). A fixing bladder (8) is connected to one side of the gas supply channel (11). A top bladder (9) is provided at the top of the gas supply channel (11). An insertion groove (14) is provided on one side of the control rod (12). A control ring (13) overlaps the surface of the insertion groove (14). The control ring (13) is slidably located at the bottom of the long rod (10). A buffer spring (15) is provided between the control ring (13) and the long rod (10).

3. A grouting system for directional reinforcement of tunnels according to claim 1, characterized in that, A second strip (16) is rotatably provided on one side of the auxiliary arm (3), and a secondary ring (5) is hinged to one side of the second strip (16). A first strip (17) is rotatably provided on one side of the main arm (2), and a main ring (4) is hinged to one side of the first strip (17). The main ring (4) is slidably provided on the lower surface of the secondary ring (5).

4. A grouting system for directional reinforcement of tunnels according to claim 1, characterized in that, A reset spring (18) is provided above the long rod (10), an internal groove (19) is provided on one side of the long rod (10), an internal block (20) is slidably provided on one side of the gas transmission channel (11), an internal groove (19) is inserted into one side of the internal block (20), and a transverse spring (21) is provided between the internal block (20) and the gas transmission channel (11).

5. A grouting system for directional reinforcement of tunnels according to claim 1, characterized in that, The upper surface of the sub-ring (5) is integrally provided with a reciprocating strip (22).

6. A grouting system for directional reinforcement of tunnels according to claim 1, characterized in that, One side of the gas delivery channel (11) is connected to an outlet (23), and a squeeze valve (24) is slidably provided on one side of the outlet (23), and a squeeze spring is provided on one side of the squeeze valve (24).

7. A grouting system for directional reinforcement of tunnels according to claim 1, characterized in that, A corresponding groove (25) is provided on the outer side of the corresponding ring (7).

8. A grouting system for directional reinforcement of tunnels according to claim 1, characterized in that, The drill rod (1) has an integrally formed ash discharge channel (26) inside, and an opening is provided in the middle of the drill rod (1).

9. A grouting system for directional reinforcement of tunnels according to claim 1, characterized in that, An inclined drilling mechanism is provided on one side of the auxiliary arm (3). The inclined drilling mechanism includes an inclined rod (27) and an extension rod (28). The extension rod (28) is installed on one side of the auxiliary arm (3). An inclined rod (27) is installed at one end of the extension rod (28). A main drill bit (29) is provided on the upper surface of the drill rod (1). A push rod (30) is provided inside the drill rod (1). A secondary ring (5) is installed at one end of the push rod (30).

10. A grouting method for directional reinforcement of tunnels according to any one of claims 1-9, characterized in that, Includes the following steps: Step 1: Control the drill rod (1) to drill holes to obtain grouting holes and gas delivery channels (11) for gas delivery; Step 2: Control the push rod (30) to retract the secondary ring (5), so that the secondary arm (3) unfolds to drill a small annular shape. Then control the push rod (30) to reset the secondary ring (5), and the drill rod (1) goes deeper. Control the push rod (30) to retract the secondary ring (5) again, so that the secondary arm (3) unfolds to drill a small annular hole and the main arm (2) unfolds with a delay to drill a large annular hole. At the same time, the top of the unfolding frame (6) deforms and contacts the large annular hole. Step 3: Stop drilling with drill rod (1), control the long rod (10) to move upward so that the fixed bladder (8) expands and seals the bottom of the grouting hole. At the same time, the top bladder (9) expands to seal the top of the grouting hole and sprays gas along the nozzle (23) so that the dust generated by drilling is discharged along the ash discharge channel (26). Control the extension rod (28) to drive the inclined rod (27) to extend out of the drill hole to obtain a through hole, so that the large annular hole and the small annular hole are connected. Step 4: Control the push rod (30) to reset the sub-ring (5) again, remove the drill rod (1) and use the grouting equipment to grout the grouting hole.

Images