Tunnel dense pressure grouting equipment

Abstract

The invention belongs to the field of tunnel construction equipment, and discloses tunnel compaction grouting equipment which comprises a grout cart, a grouting pump is mounted on the grout cart, the grout inlet end of the grouting pump is communicated with the grout cart through a pipeline, the grout outlet end of the grouting pump is communicated with a grouting pipe through a first hose, and the grouting pipe is communicated with a second hose. A sealing ring is fixed to the outer surface of the grouting pipe, a grouting head is connected into the grouting pipe in a threaded mode, and the grouting device further comprises a supporting mechanism arranged on the grouting pipe. Through the arrangement of the supporting mechanism, the grouting opening can be effectively stabilized, when grout is injected into the grouting pipe, the dynamic supporting mode can automatically adjust the supporting force according to the grouting pressure, the situation that the inner wall of the grouting opening deforms and collapses due to high pressure is effectively prevented, for example, under different geological conditions, the grouting pressure fluctuates, and the grouting opening is not prone to deformation and collapse is effectively prevented. The supporting mechanism can adapt flexibly, the structure of the grouting opening is kept stable all the time, and it is ensured that grout can be evenly injected into tunnel surrounding rock according to the preset direction and flow.

Description

Technical Field

[0001] The invention relates to the technical field of tunnel construction equipment, and in particular to a tunnel dense pressure grouting equipment. Background Art

[0002] Tunnel engineering occupies an extremely critical position in the construction of modern transportation, water conservancy and other infrastructure. In the construction and maintenance of tunnels, dense pressure grouting technology is a common and important means to reinforce surrounding rocks, fill cracks, prevent water leakage, etc., to ensure the structural stability, durability and waterproof performance of the tunnel.

[0003] However, there is a prominent problem in the existing tunnel dense pressure grouting technology. When grouting is carried out, the slurry is injected into the tunnel surrounding rock or specific grouting parts under high pressure. The grouting port, as the outlet of the slurry, is under tremendous pressure. Since the design of traditional grouting equipment often fails to fully consider the structural stability of the grouting port under high pressure environment, the inner wall of the grouting port is very easy to deform and collapse due to the inability to withstand the grouting pressure. The deformation and collapse of the grouting port will have an adverse effect on the entire grouting equipment system. When the grouting port cannot withstand the pressure normally, the pressure will be unevenly distributed in the grouting system, which may cause the grouting pipe connection to loosen and rupture, and even damage key equipment such as the grouting pump.

[0004] To this end, we proposed a tunnel dense pressure grouting equipment. Summary of the invention

[0005] The purpose of the present invention is to solve the problem in the prior art that the structural stability of the grouting port under a high-pressure environment is not fully considered, so that the inner wall of the grouting port is very easy to deform and collapse due to being unable to withstand the grouting pressure, and a tunnel dense pressure grouting equipment is proposed.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions: A tunnel dense pressure grouting equipment, comprising a slurry cart, a grouting pump installed on the slurry cart, a slurry inlet end of the grouting pump connected to the slurry cart through a pipeline, a slurry outlet end of the grouting pump connected to a grouting pipe through a hose, a sealing ring fixed to the outer surface of the grouting pipe, a grouting head connected to the inner thread of the grouting pipe, and further comprising: A support mechanism disposed on the grouting pipe, which is used to stabilize the grouting port when the slurry is injected into the grouting pipe; The extrusion mechanism is installed on the supporting mechanism, and is used to make the supporting mechanism fit more closely with the inner wall of the grouting port.

[0007] Preferably, the supporting mechanism includes a cross bar fixed to the inner wall of the grouting pipe, a movable ring is slidably arranged on the outer surface of the cross bar, a spring 1 is sleeved on the outer surface of the cross bar, both ends of the spring 1 are respectively fixedly connected to the movable ring and the grouting pipe, and extrusion blocks are equidistantly fixed on the outer surface of the movable ring.

[0008] Preferably, the supporting mechanism also includes a circular shell fixed on the grouting pipe at equal intervals, a movable plate sliding in the circular shell, an arc-shaped block fixed at the bottom of the movable plate, a limiting shell fixed on the outer surface of the arc-shaped end of the arc-shaped block, the limiting shell and the extrusion block are located on the same horizontal line, a lifting rod is fixed on the top of the movable plate, the lifting rod is slidably connected to the circular shell, a spring four is sleeved on the outer surface of the lifting rod, the two ends of the spring four are respectively fixedly connected to the circular shell and the movable plate, a lifting bar is fixed on the end of the lifting rod away from the movable plate, an elastic support plate is provided above the lifting bar, a support bar is provided on the top of the elastic support plate, and an adjusting part is provided between the lifting bar and the elastic support plate.

[0009] Preferably, the adjustment part includes a fixed cylinder fixed to the top of the lifting bar, a sliding rod slides in the fixed cylinder, a mounting bar is fixed to the top of the sliding rod, the elastic support plate is fixed to the top of the mounting bar, a second spring is sleeved on the outer surface of the sliding rod, and both ends of the second spring are fixedly connected to the fixed cylinder and the mounting bar respectively.

[0010] Preferably, the extrusion mechanism includes a rack 1 fixed at the bottom of the mounting bar, the outer surface of the rack 1 is meshed with a circular gear, a mounting block is fixed on the circular shell, the circular gear is rotatably connected to the mounting block through a rotating shaft, the outer surface of the circular gear is also meshed with a rack 2, an extrusion rod is fixed on the rack 2, and the extrusion rod corresponds to the two ends of the elastic support plate.

[0011] Preferably, a column is fixed on the mounting block, a limit block is fixed on the top of the column, a slider is slidably arranged on the outer surface of the column, and a connecting rod is fixed between the second rack and the slider.

[0012] Preferably, an auxiliary mechanism is provided on the elastic support plate, and the auxiliary mechanism is used to support the inner wall of the irregularly shaped grouting hole. The auxiliary mechanism includes a piston disk 1 fixed to one end of the sliding rod located in the fixed cylinder, and the piston disk 1 slides in the fixed cylinder. An airbag is fixed on the top of the elastic support plate, and a hose 2 is connected between the fixed cylinder and the airbag.

[0013] Preferably, a clamping mechanism is also provided on the elastic support plate, and the clamping mechanism is used to apply pressure to the support strip so that the support strip fits more closely to the inner wall of the grouting hole. The clamping mechanism includes an extrusion strip fixed on the slider, a water pad is fixed to the bottom of the limit block, and a liquid storage cylinder is fixed to the bottom of the elastic support plate. A hose three is connected between the liquid storage cylinder and the water pad.

[0014] Preferably, a piston disk 2 is slidably arranged inside the liquid storage cylinder, a piston rod is fixed on the piston disk 2, the piston rod is slidably connected to the liquid storage cylinder and the elastic support plate, the support bar is fixed to the end of the piston rod away from the piston disk 2, a spring 3 is sleeved on the outer surface of the piston rod, and the two ends of the spring 3 are respectively fixedly connected to the piston disk 2 and the liquid storage cylinder.

[0015] Compared with the prior art, the present invention has the following beneficial effects: 1. Through the setting of the supporting mechanism, the grouting port can be effectively stabilized. When the slurry is injected into the grouting pipe, this dynamic supporting method can automatically adjust the supporting force according to the size of the grouting pressure, effectively preventing the inner wall of the grouting port from deforming and collapsing due to high pressure. For example, under different geological conditions, the grouting pressure will fluctuate. The supporting mechanism can adapt flexibly and always maintain the structural stability of the grouting port, ensuring that the slurry can be evenly injected into the tunnel surrounding rock in the predetermined direction and flow rate, improving the grouting effect, and ensuring the stability and durability of the tunnel structure.

[0016] 2. Through the setting of the extrusion mechanism, when the mounting bar rises or falls under the action of the supporting mechanism, the rack 1 fixed at the bottom thereof moves accordingly and meshes with the circular gear for transmission, thereby driving the meshed rack 2 to move, and the extrusion rod on the rack 2 applies an extrusion force to both ends of the elastic support plate. During the grouting process, this extrusion action can make the elastic support plate fit more closely to the inner wall of the grouting port. Even if there are slight unevenness or irregularities on the inner wall of the grouting port, the extrusion mechanism can ensure that the support bar is in full contact with the inner wall to avoid the phenomenon of insufficient local support. This not only further enhances the supporting effect on the grouting port and prevents deformation and collapse, but also helps to improve the uniformity and accuracy of grouting, and is also beneficial to improving the overall grouting quality of the tunnel and ensuring the waterproof performance and structural safety of the tunnel.

[0017] 3. In actual tunnel construction, the shape of the grouting holes is often not completely regular, and there may be local depressions, protrusions or bends. Through the setting of auxiliary mechanisms, these irregular shapes can be adaptively adapted, so that the elastic support plate can further fill the gaps through the expansion of the airbag on the basis of providing basic support from the support bar, ensuring that the entire inner wall of the grouting port can obtain uniform and stable support force. This greatly improves the adaptability of the equipment to grouting holes of different shapes, enhances the protection of the grouting port, and avoids deformation and collapse caused by uneven support due to irregular shapes of grouting holes, thereby improving the overall effect and quality of tunnel dense pressure grouting and ensuring the smooth progress of tunnel engineering.

[0018] 4. By setting up the clamping mechanism, the friction and tightness between the support bar and the inner wall of the grouting hole can be further increased on the basis of the original support. In the high-pressure grouting environment, the support bar can be effectively prevented from being displaced or loosened due to the fluctuation of slurry pressure, thereby ensuring the stability and reliability of the support. This not only helps to maintain the structural integrity of the grouting port and prevent deformation and collapse, but also improves the stability of pressure during the grouting process, so that the slurry can be injected into the surrounding rock more evenly and continuously, thereby improving the effect of grouting reinforcement and anti-seepage, and ensuring the long-term performance and safety of the tunnel. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A three-dimensional schematic diagram of the overall structure of a tunnel dense pressure grouting equipment proposed by the present invention; Figure 2 A schematic diagram of the grouting pipe structure of a tunnel dense pressure grouting equipment proposed by the present invention; Figure 3 A schematic diagram of the internal structure of a grouting pipe of a tunnel dense pressure grouting equipment proposed by the present invention; Figure 4 A tunnel dense pressure grouting equipment proposed by the present invention Figure 3 A schematic diagram of the structure enlargement in the middle; Figure 5 A schematic diagram of the internal structure of a fixed cylinder and a liquid storage cylinder of a tunnel dense pressure grouting equipment proposed by the present invention; Figure 6 A tunnel dense pressure grouting equipment proposed by the present invention Figure 5 A magnified schematic diagram of the structure at B in the middle; Figure 7 A schematic diagram of the structure of an extrusion mechanism of a tunnel dense pressure grouting equipment proposed by the present invention; Figure 8 A tunnel dense pressure grouting equipment proposed by the present invention Figure 7 Enlarged schematic diagram of the structure at point C in the middle.

[0020] In the figure: 1, slurry cart; 2, grouting pump; 3, grouting pipe; 4, hose 1; 5, sealing ring; 6, grouting head; 70, spring 4; 71, cross bar; 72, moving ring; 73, spring 1; 74, extrusion block; 75, round shell; 76, moving plate; 77, arc block; 78, limit shell; 79, lifting rod; 710, lifting bar; 711, elastic support plate; 712, support bar; 7131, fixed cylinder; 7132, slide bar; 71 33. Mounting strip; 7134. Spring 2; 81. Rack 1; 82. Circular gear; 83. Mounting block; 84. Rack 2; 85. Extrusion rod; 86. Column; 87. Limit block; 88. Slider; 89. Connecting rod; 91. Piston disc 1; 92. Air bag; 93. Hose 2; 101. Extrusion strip; 102. Water cushion; 103. Liquid storage cylinder; 104. Piston disc 2; 105. Hose 3; 106. Piston rod; 107. Spring 3. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0022] Embodiment 1, refer to Figure 1-Figure 8 A tunnel pressure grouting device includes a slurry cart 1, a grouting pump 2 is installed on the slurry cart 1, the slurry inlet end of the grouting pump 2 is connected to the slurry cart 1 through a pipeline, the slurry outlet end of the grouting pump 2 is connected to a grouting pipe 3 through a hose 4, a sealing ring 5 is fixed on the outer surface of the grouting pipe 3, and a grouting head 6 is connected to the inner thread of the grouting pipe 3, and also includes: A support mechanism is provided on the grouting pipe 3, and when the slurry is injected into the grouting pipe 3, the support mechanism is used to stabilize the grouting port; The extrusion mechanism is installed on the supporting mechanism, and is used to make the supporting mechanism fit more closely with the inner wall of the grouting port.

[0023] Furthermore, the supporting mechanism includes a cross bar 71 fixed to the inner wall of the grouting pipe 3, a movable ring 72 is slidably arranged on the outer surface of the cross bar 71, a spring 73 is sleeved on the outer surface of the cross bar 71, two ends of the spring 73 are respectively fixedly connected to the movable ring 72 and the grouting pipe 3, and extrusion blocks 74 are equidistantly fixed on the outer surface of the movable ring 72.

[0024] Furthermore, the supporting mechanism also includes a circular shell 75 fixed on the grouting pipe 3 at equal intervals, a movable disk 76 slidingly arranged in the circular shell 75, an arc block 77 fixed at the bottom of the movable disk 76, a limiting shell 78 fixed on the outer surface of the arc end of the arc block 77, the limiting shell 78 and the extrusion block 74 are located on the same horizontal line, a lifting rod 79 is fixed on the top of the movable disk 76, the lifting rod 79 is slidably connected to the circular shell 75, a spring four 70 is sleeved on the outer surface of the lifting rod 79, the two ends of the spring four 70 are respectively fixedly connected to the circular shell 75 and the movable disk 76, a lifting bar 710 is fixed on the end of the lifting rod 79 away from the movable disk 76, an elastic support plate 711 is provided above the lifting bar 710, a support bar 712 is provided on the top of the elastic support plate 711, and an adjustment portion is provided between the lifting bar 710 and the elastic support plate 711.

[0025] Furthermore, the adjustment part includes a fixed cylinder 7131 fixed on the top of the lifting bar 710, a sliding rod 7132 slides inside the fixed cylinder 7131, a mounting bar 7133 is fixed to the top of the sliding rod 7132, the elastic support plate 711 is fixed to the top of the mounting bar 7133, a spring 2 7134 is sleeved on the outer surface of the sliding rod 7132, and two ends of the spring 2 7134 are respectively fixedly connected to the fixed cylinder 7131 and the mounting bar 7133.

[0026] During construction, the slurry cart 1 is pushed to the construction site, and the grouting head 6 and the grouting pipe 3 are inserted into the grouting port drilled in advance. The grouting port is sealed by the setting of the sealing ring 5 to prevent the slurry from leaking during grouting. By starting the grouting pump 2, the slurry in the slurry cart 1 is drawn into the grouting pipe 3 through the pipeline and the hose 4, and injected into the grouting port from the grouting head 6 to complete the grouting operation. This is the existing technology, so it will not be described in detail here.

[0027] Considering that the existing technology does not fully consider the structural stability of the grouting port under high pressure, the inner wall of the grouting port is very likely to deform and collapse due to the inability to withstand the grouting pressure, thereby having an adverse effect on the entire grouting equipment system. The following improvements are now made: By arranging a slidable moving ring 72 in the grouting pipe 3, when the slurry enters the grouting pipe 3, a backward pressure is generated on the moving ring 72, so that the moving ring 72 moves toward the arc block 77 on the outer surface of the cross bar 71, and the moving ring 72 drives the extrusion block 74 to move together. When the extrusion block 74 moves to contact with the arc block 77, it drives the arc block 77, the moving plate 76, the lifting rod 79 and the lifting bar 710 to slide upward, and squeeze the spring four 70. The lifting bar 710 drives the adjustment part and the elastic support plate 711 to move upward together, and the elastic support plate 711 drives the support bar 712 to move upward until the support bar 712 contacts the inner wall of the grouting port to support the inner wall of the grouting port.

[0028] A further advantage of adopting the above method is that when the slurry is injected into the grouting pipe 3, the impact force of the slurry can be used to effectively stabilize the grouting port. This dynamic support method can automatically adjust the support force according to the size of the grouting pressure, effectively preventing the inner wall of the grouting port from deforming and collapsing due to high pressure. For example, under different geological conditions, the grouting pressure will fluctuate, and the support mechanism can flexibly adapt to always maintain the structural stability of the grouting port, ensuring that the slurry can be evenly injected into the tunnel surrounding rock in a predetermined direction and flow rate, thereby improving the grouting effect and ensuring the stability and durability of the tunnel structure.

[0029] When the elastic support plate 711 and the support bar 712 move to conflict with the inner wall of the grouting port, the slide bar 7132 slides in the fixed tube 7131, which will drive the slide bar 7132 to slide in the fixed tube 7131, squeezing the spring 2 7134. The advantage of this is that when the grouting pressure suddenly increases and the lifting bar 710 rises rapidly, the spring 2 7134 can buffer this rapid pressure change and prevent the elastic support plate 711 and the support bar 712 from being subjected to excessive impact. At the same time, it can also absorb and disperse the vibration and impact force during the grouting process to a certain extent, and provide power for the operation of subsequent auxiliary mechanisms and extrusion mechanisms.

[0030] It should be noted that the limiting shell 78 is arranged in the middle of the arc-shaped part of the arc block 77, so that when the extrusion block 74 moves into the limiting shell 78, the limiting shell 78 can resist the extrusion block 74, so that the extrusion block 74 is always located in the center part of the arc block 77, providing the best support force, avoiding the extrusion block 74 away from the arc block 77, causing the elastic support plate 711 and the support bar 712 to drop, affecting the support effect, and the slurry can be prevented from flowing out by sliding the moving disk 76 in the circular shell 75.

[0031] Example 2, refer to Figure 1-Figure 8 A tunnel pressure grouting device includes a slurry cart 1, a grouting pump 2 is installed on the slurry cart 1, the slurry inlet end of the grouting pump 2 is connected to the slurry cart 1 through a pipeline, the slurry outlet end of the grouting pump 2 is connected to a grouting pipe 3 through a hose 4, a sealing ring 5 is fixed on the outer surface of the grouting pipe 3, and a grouting head 6 is connected to the inner thread of the grouting pipe 3, and also includes: A support mechanism is provided on the grouting pipe 3, and when the slurry is injected into the grouting pipe 3, the support mechanism is used to stabilize the grouting port; The extrusion mechanism is installed on the supporting mechanism, and is used to make the supporting mechanism fit more closely with the inner wall of the grouting port.

[0032] Furthermore, the extrusion mechanism includes a rack 81 fixed at the bottom of the mounting strip 7133, the outer surface of the rack 81 is meshed with a circular gear 82, a mounting block 83 is fixed on the circular shell 75, the circular gear 82 is rotatably connected to the mounting block 83 through a rotating shaft, the outer surface of the circular gear 82 is also meshed with a rack 2 84, an extrusion rod 85 is fixed on the rack 2 84, and the extrusion rod 85 corresponds to the two ends of the elastic support plate 711.

[0033] Furthermore, a column 86 is fixed on the mounting block 83 , a limit block 87 is fixed on the top of the column 86 , a slider 88 is slidably disposed on the outer surface of the column 86 , and a connecting rod 89 is fixed between the second rack 84 and the slider 88 .

[0034] Furthermore, an auxiliary mechanism is provided on the elastic support plate 711, and the auxiliary mechanism is used to support the inner wall of the irregularly shaped grouting hole. The auxiliary mechanism includes a piston disk 91 fixed to one end of the sliding rod 7132 located in the fixed cylinder 7131, and the piston disk 91 slides in the fixed cylinder 7131. An airbag 92 is fixed on the top of the elastic support plate 711, and a hose 93 is connected between the fixed cylinder 7131 and the airbag 92.

[0035] Considering that some grouting ports have different inner diameters and the inner wall of the grouting ports has slight unevenness or irregularity, the support strips 712 at both ends of the elastic support plate 711 cannot fit well with the inner wall of the grouting port, resulting in a weakened support effect. Improvements are now made: When the elastic support plate 711 contacts the inner wall of the grouting port and drives the mounting bar 7133 and the sliding rod 7132 to move downward, it will also drive the rack 1 81 to slide downward. Since the circular gear 82 is meshed with the rack 1 81 and the rack 2 84, when the rack 1 81 moves downward, by driving the circular gear 82 to rotate, it will also drive the rack 2 84 to move upward. The rack 2 84 in turn drives the extrusion rod 85 to move upward, so that the extrusion rod 85 contacts the two ends of the elastic support plate 711 and applies pressure thereto. Due to the elasticity of the elastic support plate 711, the elastic support plate 711 fits the inner wall of the grouting port more closely.

[0036] A further advantage of adopting the above method is that during the grouting process, the squeezing action can make the elastic support plate 711 fit more closely with the inner wall of the grouting port. Even if there are slight unevenness or irregularities on the inner wall of the grouting port, the squeezing mechanism can ensure that the support bar 712 is in full contact with the inner wall to avoid the phenomenon of insufficient local support. This not only further enhances the supporting effect on the grouting port and prevents deformation and collapse, but also helps to improve the uniformity and accuracy of grouting. It is also beneficial to improve the overall grouting quality of the tunnel and ensure the waterproof performance and structural safety of the tunnel. By sliding the slider 88 on the outer surface of the column 86, the rack 2 84 can be limited, thereby improving the stability of the rack 2 84 when it is raised and lowered. By setting the limit block 87, the slider 88 is prevented from moving out of the outer surface of the column 86.

[0037] At the same time, when the slide rod 7132 slides downward in the fixed cylinder 7131, it will also drive the piston plate 1 91 to slide in the fixed cylinder 7131, squeezing the gas in the fixed cylinder 7131, allowing the gas to enter the airbag 92 through the hose 2 93, causing the airbag 92 to expand.

[0038] A further benefit of adopting the above is that the airbag 92 is arranged on the top of the elastic support plate 711. When the airbag 92 is inflated, it can effectively supplement the support for the inner wall of the irregularly shaped grouting hole. In actual tunnel construction, the shape of the grouting hole is often not completely regular, and there may be local depressions, protrusions or bends. The auxiliary mechanism can adapt to these irregular shapes, so that the elastic support plate 711, on the basis of the basic support provided by the support bar 712, further fills the gap through the expansion of the airbag 92, ensuring that the entire grouting port The inner wall can obtain uniform and stable support force, which greatly improves the adaptability of the equipment to grouting holes of different shapes, enhances the protection of the grouting port, and avoids deformation and collapse caused by uneven support due to the irregular shape of the grouting hole, thereby improving the overall effect and quality of the tunnel dense pressure grouting and ensuring the smooth progress of the tunnel project.

[0039] Example 3, refer to Figure 1-Figure 8 A tunnel pressure grouting device includes a slurry cart 1, a grouting pump 2 is installed on the slurry cart 1, the slurry inlet end of the grouting pump 2 is connected to the slurry cart 1 through a pipeline, the slurry outlet end of the grouting pump 2 is connected to a grouting pipe 3 through a hose 4, a sealing ring 5 is fixed on the outer surface of the grouting pipe 3, and a grouting head 6 is connected to the inner thread of the grouting pipe 3, and also includes: A support mechanism is provided on the grouting pipe 3, and when the slurry is injected into the grouting pipe 3, the support mechanism is used to stabilize the grouting port; The extrusion mechanism is installed on the supporting mechanism, and is used to make the supporting mechanism fit more closely with the inner wall of the grouting port.

[0040] Furthermore, a clamping mechanism is also provided on the elastic support plate 711, and the clamping mechanism is used to apply pressure to the support bar 712 so that the support bar 712 fits the inner wall of the grouting hole more closely. The clamping mechanism includes an extrusion bar 101 fixed on the slider 88, a water pad 102 is fixed to the bottom of the limit block 87, a liquid storage cylinder 103 is fixed to the bottom of the elastic support plate 711, and a hose 105 is connected between the liquid storage cylinder 103 and the water pad 102.

[0041] Furthermore, a piston disk 104 slides inside the liquid storage cylinder 103, a piston rod 106 is fixed on the piston disk 104, the piston rod 106 is slidably connected to the liquid storage cylinder 103 and the elastic support plate 711, the support bar 712 is fixed to the end of the piston rod 106 away from the piston disk 104, the outer surface of the piston rod 106 is sleeved with a spring 3 107, and the two ends of the spring 3 107 are respectively fixedly connected to the piston disk 104 and the liquid storage cylinder 103.

[0042] When the slider 88 slides upward on the outer surface of the column 86, it will also drive the squeezing bar 101 to move upward. When the squeezing bar 101 moves to contact the water pad 102, it will squeeze the water pad 102, so that the liquid in the water pad 102 enters the liquid storage cylinder 103 through the hose three 105. Since the piston disc two 104 slides in the liquid storage cylinder 103, the piston disc two 104 will move upward due to the impact of the liquid, thereby driving the piston rod 106 and the support bar 712 to move upward, squeezing the spring three 107.

[0043] A further benefit of adopting the above method is that the piston disc 104 in the liquid storage cylinder 103 drives the piston rod 106 to move under the action of liquid pressure, and the support bar 712 on the piston rod 106 further presses the inner wall of the grouting hole. This pressing effect can further increase the friction and fit tightness between the support bar 712 and the inner wall of the grouting hole on the basis of the original support. In the high-pressure grouting environment, the support bar 712 can be effectively prevented from being displaced or loosened due to slurry pressure fluctuations, thereby ensuring the stability and reliability of the support. This not only helps to maintain the structural integrity of the grouting port and prevent deformation and collapse, but also can improve the stability of the pressure during the grouting process, so that the slurry can be injected into the surrounding rock more evenly and continuously, thereby improving the grouting reinforcement and anti-seepage effects, and ensuring the long-term performance and safety of the tunnel.

[0044] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A tunnel pressure grouting device, comprising a slurry trolley (1), characterized in that: The slurry cart (1) is provided with a grouting pump (2), the slurry inlet end of the grouting pump (2) is connected to the slurry cart (1) via a pipeline, the slurry outlet end of the grouting pump (2) is connected to a grouting pipe (3) via a hose (4), a sealing ring (5) is fixed to the outer surface of the grouting pipe (3), and the grouting pipe (3) is internally threadedly connected to a grouting head (6), and further comprises: A support mechanism is arranged on the grouting pipe (3), and when the slurry is injected into the grouting pipe (3), the support mechanism is used to stabilize the grouting port; The extrusion mechanism is installed on the supporting mechanism, and is used to make the supporting mechanism fit more closely with the inner wall of the grouting port.

2. The tunnel dense pressure grouting equipment according to claim 1, characterized in that: The support mechanism comprises a cross bar (71) fixed to the inner wall of the grouting pipe (3), a movable ring (72) slidingly arranged on the outer surface of the cross bar (71), a spring 1 (73) sleeved on the outer surface of the cross bar (71), two ends of the spring 1 (73) respectively fixedly connected to the movable ring (72) and the grouting pipe (3), and extrusion blocks (74) equidistantly fixed to the outer surface of the movable ring (72).

3. The tunnel dense pressure grouting equipment according to claim 2, characterized in that: The supporting mechanism further comprises a circular shell (75) fixed on the grouting pipe (3) at equal intervals, a movable plate (76) slidingly arranged in the circular shell (75), an arc block (77) fixed at the bottom of the movable plate (76), a limiting shell (78) fixed on the outer surface of the arc end of the arc block (77), the limiting shell (78) and the extrusion block (74) being located on the same horizontal line, a lifting rod (79) fixed on the top of the movable plate (76), the lifting rod (79) being slidably connected to the circular shell (75), the A spring four (70) is sleeved on the outer surface of the lifting rod (79), and the two ends of the spring four (70) are respectively fixedly connected to the circular shell (75) and the movable plate (76). A lifting bar (710) is fixed to the end of the lifting rod (79) away from the movable plate (76), an elastic support plate (711) is provided above the lifting bar (710), a support bar (712) is provided on the top of the elastic support plate (711), and an adjustment portion is provided between the lifting bar (710) and the elastic support plate (711).

4. The tunnel dense pressure grouting equipment according to claim 3, characterized in that: The adjustment portion comprises a fixed cylinder (7131) fixed to the top of the lifting bar (710), a sliding rod (7132) sliding in the fixed cylinder (7131), a mounting bar (7133) fixed to the top of the sliding rod (7132), the elastic support plate (711) fixed to the top of the mounting bar (7133), a second spring (7134) sleeved on the outer surface of the sliding rod (7132), and two ends of the second spring (7134) respectively fixedly connected to the fixed cylinder (7131) and the mounting bar (7133).

5. The tunnel dense pressure grouting equipment according to claim 4, characterized in that: The extrusion mechanism comprises a rack 1 (81) fixed at the bottom of the mounting bar (7133), the outer surface of the rack 1 (81) is meshed with a circular gear (82), a mounting block (83) is fixed on the circular shell (75), the circular gear (82) is rotatably connected to the mounting block (83) via a rotating shaft, the outer surface of the circular gear (82) is also meshed with a rack 2 (84), the rack 2 (84) is fixed with an extrusion rod (85), and the extrusion rod (85) corresponds to the two ends of the elastic support plate (711).

6. The tunnel dense pressure grouting equipment according to claim 5, characterized in that: A column (86) is fixed on the mounting block (83), a limit block (87) is fixed on the top of the column (86), a slider (88) is slidably disposed on the outer surface of the column (86), and a connecting rod (89) is fixed between the second rack (84) and the slider (88).

7. The tunnel dense pressure grouting equipment according to claim 4, characterized in that: An auxiliary mechanism is provided on the elastic support plate (711), and the auxiliary mechanism is used to support the inner wall of the grouting hole of irregular shape. The auxiliary mechanism comprises a piston disc 1 (91) fixed to one end of the sliding rod (7132) located in the fixed cylinder (7131), and the piston disc 1 (91) slides in the fixed cylinder (7131). An air bag (92) is fixed on the top of the elastic support plate (711), and a hose 2 (93) is connected between the fixed cylinder (7131) and the air bag (92).

8. The tunnel dense pressure grouting equipment according to claim 6, characterized in that: The elastic support plate (711) is also provided with a clamping mechanism, which is used to apply pressure to the support strip (712) so that the support strip (712) is more closely fitted to the inner wall of the grouting hole, the clamping mechanism comprising an extrusion strip (101) fixed on the slider (88), a water pad (102) fixed to the bottom of the limit block (87), a liquid storage cylinder (103) fixed to the bottom of the elastic support plate (711), and a hose three (105) connected between the liquid storage cylinder (103) and the water pad (102).

9. The tunnel dense pressure grouting equipment according to claim 8, characterized in that: A piston disc 2 (104) slides inside the liquid storage cylinder (103), a piston rod (106) is fixed on the piston disc 2 (104), the piston rod (106) is slidably connected to the liquid storage cylinder (103) and the elastic support plate (711), the support bar (712) is fixed to the end of the piston rod (106) away from the piston disc 2 (104), the outer surface of the piston rod (106) is sleeved with a spring 3 (107), and the two ends of the spring 3 (107) are respectively fixedly connected to the piston disc 2 (104) and the liquid storage cylinder (103).

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