Tunnel directional grouting reinforcement device based on pressure control

Abstract

The invention discloses a tunnel directional grouting reinforcement device based on pressure control, which relates to the technical field of grouting reinforcement. For tunnel grouting construction operations, the structure of an outlet pipe is optimized based on a grouting trolley, the interface pipe will not essentially change the injection state of concrete slurry, and a grouting mode of high-pressure in and low-pressure out is maintained during the overall grouting process, which is manifested in that the pressure generated by pouring concrete slurry is used as a power source to change the front cone block, the rear cone block and the movable connecting pipe column inside the interface pipe for directional movement, so that the concrete slurry is poured into the inner lining structure layer in a relatively low-pressure stable state while maintaining the state of being poured in a high-pressure state, and the purpose is to maintain the high-pressure state of concrete slurry pouring. However, in order to reduce the damage effect of the concrete slurry on the inner lining structure layer caused by high-pressure erosion, an active pressure supplementation mode is further adopted to interfere with the pressure fluctuation state affecting the concrete slurry.

Description

Technical Field

[0001] The invention relates to the technical field of grouting reinforcement, and in particular to a tunnel directional grouting reinforcement device based on pressure control. Background Art

[0002] The steps of tunnel construction in tunnel construction work mainly include construction of the portal section and tunnel gate, tunnel excavation and digging, initial tunnel support, tunnel waterproofing layer construction, secondary lining construction and other steps. Each step requires strict control of construction quality. The secondary lining construction step is used as an example. Its essence is to continuously pour concrete slurry at a fixed point. Please refer to the relevant content in the publication number CN110700854A.

[0003] The grouting process is mainly controlled by a grouting trolley and assisted by a computer system. However, it should be noted that on the basis of ensuring the quality of the concrete slurry, in order to ensure that the concrete slurry is poured into every position in the fixed area, the grouting pressure needs to be increased. However, the concrete slurry in a high-pressure state has the risk of high-pressure erosion and even damage to the lining structure layer, resulting in concrete slurry penetration or leakage. However, pouring concrete slurry in a low-pressure state will also result in uneven distribution of the slurry, which will affect the stability of the subsequent structural layer.

[0004] This application proposes a solution to this problem. Summary of the invention

[0005] The purpose of the present invention is to provide a tunnel directional grouting reinforcement device based on pressure control, which is aimed at the concrete grouting process in tunnel construction operations, wherein the pressure of the concrete slurry is one of the key factors directly affecting the construction quality. If the pressure is too high, there will be problems of erosion or damage to the lining structure layer, while if the pressure is too low, it will also lead to uneven distribution of the slurry, which will also directly affect the stability of the subsequent structural layers.

[0006] The object of the present invention can be achieved by the following technical scheme: a tunnel directional grouting reinforcement device based on pressure control is applied in a grouting trolley and comprises an interface pipe, a movable connecting pipe column is arranged at the center point of the interface pipe, and a cooperative blade group and a fixed flow sheet are arranged at the inner wall of the interface pipe respectively;

[0007] The movable connecting pipe column extends to an external position of the interface pipe at one end away from the cooperative blade group, and a plurality of reflux claw tubes are installed on one end of the movable connecting pipe column. The interior of the movable connecting pipe column and the reflux claw tube are hollow, and both ends of the movable connecting pipe column and the reflux claw tube are open. A front cone block and a rear cone block are respectively provided on the middle part of the movable connecting pipe column corresponding to the cooperative blade group and the fixed flow blade, and a cooperative rubber ring piece corresponding to the movable connecting pipe column is installed between the front cone block and the rear cone block. A slurry discharge bin is arranged on the external position of the movable connecting pipe column corresponding to the cooperative rubber ring piece, and a slurry discharge groove is provided on the outer wall position of the movable connecting pipe column corresponding to the slurry discharge bin.

[0008] It is further configured as follows: the cooperative blade group is rotationally connected on the inner wall of the interface pipe, the fixed flow sheet is installed on the inner wall of the interface pipe, and the movable connecting column and the fixed flow sheet are slidably connected.

[0009] It is further configured that: a limit strip group is installed on the outer wall position of the movable connecting column corresponding to the cooperative blade group, and the cooperative blade group is slidably connected to the movable connecting column through the limit strip group.

[0010] It is further configured as follows: the front cone block and the rear cone block are arranged in sequence along the direction from the cooperative blade group to the return claw tube, and the front cone block, the rear cone block and the movable connecting pipe column maintain sliding connection and fixed connection, and the movable connecting pipe column is provided with a connecting spring at an external position between the rear cone block and the fixed flow sheet.

[0011] It is further configured that: the cross sections of the front cone block and the rear cone block are both in a transverse cone shape, and the tips of the front cone block and the rear cone block are located away from each other.

[0012] It is further configured that: the front cone block and the rear cone block are smaller than the inner diameter of the interface pipe, and each of the reflux claw tubes is reversely bent along the position pointing to the interface pipe.

[0013] It is further configured that: the interface pipe is respectively configured as an injection port and an exhaust port along the direction of the cooperative blade group and the return claw pipe.

[0014] It is further configured as follows: a compressed rubber cap is installed at a middle position between the movable connecting column corresponding to the fixed flow sheet and the reflux claw tube, the cross section of the compressed rubber cap is in a curved arch shape, and the edge of the compressed rubber cap points in the direction of the reflux claw tube.

[0015] It is further configured as follows: a pressure cylinder corresponding to the slurry discharge bin is installed at the external position of the interface pipe, the output shaft end of the pressure cylinder extends to the internal position of the interface pipe, and a passive pressure block is installed at the end position of the output shaft of the pressure cylinder, the passive pressure block corresponds to the middle position of the cooperative rubber ring piece, and the passive pressure blocks are arranged in a circular array along the center point of the movable connecting pipe column.

[0016] The present invention has the following beneficial effects:

[0017] 1. The present invention is based on the improvement and optimization of the grouting trolley in the tunnel grouting operation. Specifically, the interface pipe structure for grouting is proposed. The interface pipe will not change the injection state of the concrete slurry in essence. The grouting mode of high pressure in and low pressure out is maintained during the overall grouting process. The performance is: the pressure generated when the concrete slurry is poured is used as the power source, so as to force the front cone block, the rear cone block and the movable connecting pipe column inside the interface pipe to move in a directional manner. The concrete slurry is poured in a high-pressure state, but the passive movement mode performed by multiple structures "consumes" part of the concrete slurry pressure, and the impact process of the two concrete slurries is used to reduce the high-pressure erosion degree of the lining structure layer by the high-pressure concrete slurry;

[0018] 2. The cooperative rubber ring between the front cone block and the rear cone block is subjected to the compression deformation degree of the two parts of the concrete slurry pressure. The cooperative rubber ring undergoes different compression deformation degrees under the pressure of the two concrete slurries, and on this basis, a passive pressure block that plays an interference role is added again. Because the cooperative rubber ring cooperates with the front cone block and the rear cone block to withstand double pressure, when the cooperative rubber ring is deformed under the double pressure, the deformation degree of the cooperative rubber ring is further limited by active pressure compensation, thereby further changing the pressure state of the concrete slurry when it is discharged, and finally ensuring that the two concrete slurries are "mixed" into a relatively low-pressure and stable concrete slurry. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 This is a schematic structural diagram of a tunnel directional grouting reinforcement device based on pressure control proposed by the present invention;

[0021] Figure 2 The invention provides a tunnel directional grouting reinforcement device based on pressure control. Figure 1 A cross-sectional view of

[0022] Figure 3 The invention provides a tunnel directional grouting reinforcement device based on pressure control. Figure 1 sectional view of

[0023] Figure 4 The invention provides a tunnel directional grouting reinforcement device based on pressure control. Figure 3Split diagram of ;

[0024] Figure 5 It is a partial cross-sectional view of the movable connecting pipe column in the tunnel directional grouting reinforcement device based on pressure control proposed by the present invention;

[0025] Figure 6 This is a schematic structural diagram of the movable connecting pipe column in the tunnel directional grouting reinforcement device based on pressure control proposed by the present invention.

[0026] In the figure: 1. Interface pipe; 2. Pressure cylinder; 3. Reflux claw pipe; 4. Active connecting pipe column; 5. Cooperative blade group; 6. Front cone block; 7. Rear cone block; 8. Connecting spring; 9. Fixed flow sheet; 10. Pressure rubber cap; 11. Cooperative rubber ring; 12. Passive pressure block; 13. Limiting strip group; 14. Slurry discharge trough. DETAILED DESCRIPTION

[0027] The technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] Embodiment 1: In the concrete grouting process in tunnel construction, the pressure of the concrete slurry is one of the key factors that directly affect the construction quality. If the pressure is high, there will be problems of erosion or damage to the lining structure layer, while low pressure will also lead to uneven distribution of the slurry, which will also directly affect the stability of the subsequent structural layer. The following technical solutions are proposed:

[0029] Reference Figures 1 to 6 The tunnel directional grouting reinforcement device based on pressure control in this embodiment is applied in a grouting trolley and comprises an interface pipe 1, a movable connecting pipe column 4 is arranged at the center point of the interface pipe 1, and a cooperative blade group 5 and a fixed flow sheet 9 are arranged at the inner wall of the interface pipe 1;

[0030] The movable connecting pipe column 4 extends from one end position away from the cooperative blade group 5 to the external position of the interface pipe 1, and a plurality of reflux claw tubes 3 are installed on one end position of the movable connecting pipe column 4, the movable connecting pipe column 4 and the reflux claw tube 3 are hollow inside, and the two ends of the movable connecting pipe column 4 and the reflux claw tube 3 are open, and the movable connecting pipe column 4 corresponding to the cooperative blade group 5 and the fixed flow sheet 9 are respectively provided with a front cone block 6 and a rear cone block 7 on the middle part, and a cooperative rubber ring piece 11 corresponding to the movable connecting pipe column 4 is installed between the front cone block 6 and the rear cone block 7, and the external position of the movable connecting pipe column 4 corresponding to the cooperative rubber ring piece 11 is set as a slurry discharge bin, and a slurry discharge groove 14 is opened on the outer wall position of the movable connecting pipe column 4 corresponding to the slurry discharge bin, the cooperative blade group 5 is rotatably connected on the inner wall position of the interface pipe 1, the fixed flow sheet 9 is installed on the inner wall position of the interface pipe 1, and the movable connecting pipe column 4 and the fixed flow sheet 9 are slidably connected.

[0031] Working principle: First of all, it should be explained that the interface pipe 1 structure proposed in the present invention is used in conjunction with the grouting trolley. The interface pipe 1 is installed at the concrete slurry discharge port on the grouting trolley, and according to the tunnel construction requirements, the concrete slurry is poured into the lining structure layer in a high-pressure state. However, the interface pipe 1 in the present invention mainly changes autonomously in conjunction with the pressure change during the injection of the concrete slurry;

[0032] by Figure 2 For example, concrete slurry along Figure 2 The left side position is injected into the right side position. In this state, the fluidity and pressure of the concrete slurry itself are used to drive the cooperative blade group 5 to rotate at a high speed. The cooperative blade group 5 initially reduces the high pressure of the concrete slurry by consuming the "self-pressure" of the concrete slurry, but this part is relatively simple. The key content of the present invention is that the movable connecting column 4 and the reflux claw tube 3 are hollow, so when the concrete slurry is directly injected into the interface pipe 1, the interior of the movable connecting column 4 will first be used as the first channel, and then the interface pipe 1 will be positioned as the second channel. However, it should be noted that the main change is the structural shape of the reflux claw tube 3. The direction in which the concrete slurry flows out of the reflux claw tube 3 is completely opposite to that of the interface pipe 1. The impact process of the two concrete slurries is used to reduce the high-pressure erosion of the lining structure layer by the concrete slurry in the high-pressure state.

[0033] Embodiment 2: This embodiment provides supplementary explanation for the movable connecting column in Embodiment 1;

[0034] A limit strip group 13 is installed on the outer wall position of the movable connecting column 4 corresponding to the cooperative blade group 5. The cooperative blade group 5 is slidably connected to the movable connecting column 4 through the limit strip group 13. The front cone block 6 and the rear cone block 7 are arranged in sequence along the direction from the cooperative blade group 5 to the reflux claw tube 3, and the front cone block 6, the rear cone block 7 and the movable connecting column 4 maintain a sliding connection and a fixed connection. The movable connecting column 4 is located at an external position between the rear cone block 7 and the fixed flow sheet 9. The cross-sections of the front cone block 6 and the rear cone block 7 are both transverse cones, and the pointed positions of the front cone block 6 and the rear cone block 7 are far away from each other.

[0035] The following is a detailed description of the working process of the movable connecting pipe string 4:

[0036] S1: Although the movable connecting column 4 also serves as a flow channel for the concrete slurry, it is also subject to the pressure of the concrete slurry itself, and the movable connecting column 4 will also move from left to right, but it will also be restricted by the limit bar group 13, and the movable connecting column 4 and the cooperative blade group 5 can both rotate and slide;

[0037] S2: In combination with S1, the concrete slurry will also completely fill the interface pipe 1 and flow from left to right, so the front cone block 6 moves from left to right relative to the rear cone block 7. However, as shown in S1, due to the movement of the movable connecting column 4, the rear cone block 7 will also move from left to right relative to the front cone block 6. It can be understood that the front cone block 6 will undergo a secondary sliding process relative to the rear cone block 7, and the connecting spring 8 is mainly used to provide buffer protection for the rear cone block 7.

[0038] S3: Explanation in combination with S1 and S2: Due to the influence of the high pressure of the concrete slurry, the movable connecting column 4 eventually moves to the rightmost position, and the reflux claw tube 3 and the pressure rubber cap 10 therein will both extend out of one end of the interface tube 1. The concrete slurry sprayed from the reflux claw tube 3 and the concrete slurry sprayed from the interface tube 1 impact the pressure rubber cap 10 in both left and right directions. The purpose of this structure is to allow the pressure rubber cap 10 to further withstand the impact process of the two streams of concrete slurry, mainly to avoid the two streams of concrete slurry from having a large degree of impact or even a backflow, and ultimately to ensure that the two streams of concrete slurry are "mixed into" a relatively low-pressure and stable concrete slurry, and thus discharged in a low-pressure state.

[0039] Embodiment three:

[0040] In this embodiment, the operating state of the overall structure is described as follows in combination with the first embodiment and the second embodiment:

[0041] The front cone block 6 and the rear cone block 7 are smaller than the inner diameter of the interface pipe 1. Each reflux claw tube 3 is reversely bent along the position pointing to the interface pipe 1. The interface pipe 1 is respectively set as an injection port and a discharge port along the direction of the cooperative blade group 5 and the reflux claw tube 3. A pressure-bearing rubber cap 10 is installed at the middle position of the movable connecting pipe column 4 corresponding to the fixed flow sheet 9 and the reflux claw tube 3. The cross-section of the pressure-bearing rubber cap 10 is in a curved arch shape, and the pressure-bearing rubber cap 10 is along the direction pointing to the reflux claw tube 3. A pressure coupling cylinder 2 corresponding to the slurry discharge bin is installed at the external position of the interface pipe 1. The end of the output shaft of the pressure coupling cylinder 2 extends to the internal position of the interface pipe 1, and a passive pressure block 12 is installed at the end of the output shaft of the pressure coupling cylinder 2. The passive pressure block 12 corresponds to the middle section of the cooperative rubber ring sheet 11, and the passive pressure block 12 is arranged in a circular array along the center point of the movable connecting pipe column 4.

[0042] Solution description: In combination with the relevant contents of the second embodiment, it should be explained that the concrete slurry poured into the interface pipe 1 is divided into two parts, one of which is discharged along the movable connecting pipe column 4, because this part has not undergone any structural "consumption process", and is therefore set as a high-pressure part, and the other part is discharged along the middle position between the movable connecting pipe column 4 and the interface pipe 1, because it has passed through the cooperation of the front cone block 6, the rear cone block 7 and the cooperative blade group 5, resulting in its pressure being slightly lower than the high-pressure part, and is therefore set as a low-pressure part;

[0043] It should be noted that: for the concrete slurry in the high-pressure part, although the concrete slurry is directly discharged through the reflux claw pipe 3, it will completely fill the slurry discharge bin through the slurry discharge groove 14 during its flow, causing the cooperative rubber ring piece 11 therein to present a state of external expansion and bevel. Because the concrete slurry pressure in the low-pressure part is less than the concrete slurry pressure in the high-pressure part, the cooperative rubber ring piece 11 directly presents a state of external expansion. However, it should be noted that the front cone block 6 will also be affected by the concrete slurry pressure and move to the right, further squeezing the slurry discharge bin to reduce its internal volume.

[0044] In combination with the above content, it should be explained that: assuming that only the concrete slurry can flow inside the movable connecting column 4, the front cone block 6 and the rear cone block 7 are separated from each other to the maximum extent, and the cooperative rubber ring piece 11 will also be fully expanded and deformed. However, in actual situations, the front cone block 6 has a secondary sliding, which will further affect the expansion and deformation degree of the cooperative rubber ring piece 11. For this state, please refer to Figure 3Specifically, the discharge process of the concrete slurry in the low-pressure part is changed by limiting the expansion and deformation degree of the cooperative rubber ring piece 11. Its essence is to increase or reduce the pressure through the pressure cylinder 2. Specifically, the expansion and deformation degree of the cooperative rubber ring piece 11 is changed by pressure changes, so as to reversely control the specific pressure of the concrete slurry in the low-pressure part when it is discharged from the interface pipe 1. For example, when the pressure cylinder 2 performs periodic pressure increase / pressure reduction actions, the pressure of the pressure cylinder 2 in the low-pressure part is first reduced and then increased. The purpose is to ensure that the pressure of the concrete slurry discharged from the reflux claw pipe 3 is in a relatively stable and low-pressure state, specifically to ensure that the pressures of the concrete slurry in the low-pressure part and the high-pressure part are relatively consistent.

[0045] In summary: for tunnel grouting construction operations, the structure of the outlet pipe is optimized based on the grouting trolley. The interface pipe will not essentially change the injection state of the concrete slurry. The high-pressure in-low-pressure out grouting method is maintained during the overall grouting process. It is manifested in that: the pressure generated by the injection of concrete slurry is used as a power source to change the front cone block, rear cone block and movable connecting pipe column inside the interface pipe for directional movement, so that the concrete slurry is injected into the lining structure layer in a relatively low-pressure stable state while maintaining the state of being injected in a high-pressure state. The purpose is to maintain the high-pressure state of the concrete slurry injection. However, in order to reduce the damage caused by the high-pressure erosion of the lining structure layer by the concrete slurry, the active pressure supplementation method is further used to interfere with the pressure fluctuation state of the concrete slurry.

[0046] The above contents are merely examples and explanations of the structure of the present invention. The technicians in this technical field may make various modifications or additions to the specific embodiments described or replace them in a similar manner. As long as they do not deviate from the structure of the invention or exceed the scope defined by the claims, they should all fall within the protection scope of the present invention.

[0047] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0048] The preferred embodiments of the present invention disclosed above are only used to help explain the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to only specific implementation methods. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A tunnel directional grouting reinforcement device based on pressure control, applied in a grouting trolley and comprising an interface pipe (1), characterized in that: A movable connecting pipe column (4) is arranged at the center point of the interface pipe (1), and a cooperative blade group (5) and a fixed flow blade (9) are arranged at the inner wall of the interface pipe (1); The movable connecting pipe column (4) extends from one end position away from the cooperative blade group (5) to the external position of the interface pipe (1), and a plurality of return claw tubes (3) are installed at one end position of the movable connecting pipe column (4), the interior of the movable connecting pipe column (4) and the return claw tube (3) are hollow, and the two ends of the movable connecting pipe column (4) and the return claw tube (3) are open, and the middle part of the movable connecting pipe column (4) corresponding to the cooperative blade group (5) and the fixed flow blade (9) is respectively provided with a front cone block (6) and a rear cone block (7), and a cooperative rubber ring piece (11) corresponding to the movable connecting pipe column (4) is installed between the front cone block (6) and the rear cone block (7), and a slurry discharge bin is arranged at the external position of the movable connecting pipe column (4) corresponding to the cooperative rubber ring piece (11), and a slurry discharge groove (14) is opened at the outer wall position of the movable connecting pipe column (4) corresponding to the slurry discharge bin; The front cone block (6) and the rear cone block (7) are arranged in sequence along the direction from the cooperative blade group (5) to the return claw tube (3), and the front cone block (6), the rear cone block (7) and the movable connecting column (4) maintain sliding connection and fixed connection. The movable connecting column (4) is provided with a connecting spring (8) at an external position between the rear cone block (7) and the fixed flow sheet (9). The front cone block (6) and the rear cone block (7) are smaller than the inner diameter of the interface tube (1). Each of the return claw tubes (3) is reversely bent along the position pointing to the interface tube (1). The movable connecting column (4) is installed with a pressure-bearing rubber cap (10) at the middle position corresponding to the fixed flow sheet (9) and the return claw tube (3). The cross section of the pressure-bearing rubber cap (10) is in a curved arch shape, and the pressure-bearing rubber cap (10) is along the direction pointing to the return claw tube (3).

2. The tunnel directional grouting reinforcement device based on pressure control according to claim 1 is characterized in that: The cooperative blade group (5) is rotatably connected to the inner wall of the interface pipe (1), the fixed flow sheet (9) is installed on the inner wall of the interface pipe (1), and the movable connecting column (4) and the fixed flow sheet (9) are slidably connected.

3. The tunnel directional grouting reinforcement device based on pressure control according to claim 2 is characterized in that: A limit strip group (13) is installed on the outer wall position of the movable connecting column (4) corresponding to the cooperating blade group (5), and the cooperating blade group (5) is slidably connected to the movable connecting column (4) via the limit strip group (13).

4. The tunnel directional grouting reinforcement device based on pressure control according to claim 1 is characterized in that: The cross sections of the front cone block (6) and the rear cone block (7) are both in the shape of transverse cones, and the tips of the front cone block (6) and the rear cone block (7) are located away from each other.

5. The tunnel directional grouting reinforcement device based on pressure control according to claim 1 is characterized in that: The interface pipe (1) is respectively arranged as an injection port and an exhaust port along the direction of the cooperative blade group (5) and the return claw pipe (3).

6. The tunnel directional grouting reinforcement device based on pressure control according to claim 1 is characterized in that: A pressure coupling cylinder (2) corresponding to the slurry discharge bin is installed at the external position of the interface pipe (1), the output shaft end of the pressure coupling cylinder (2) extends to the internal position of the interface pipe (1), and a passive pressure block (12) is installed at the output shaft end of the pressure coupling cylinder (2), the passive pressure block (12) corresponds to the middle position of the cooperative rubber ring sheet (11), and the passive pressure blocks (12) are arranged in a circular array along the center point of the movable connecting pipe column (4).

Images