A grouting machine for shallow buried bias pressure open excavation and concealed construction of tunnel portal

Abstract

The present invention relates to the field of tunnel construction, and in particular to a tunnel portal shallow-buried biased open-cut and concealed construction grouting machine. The present invention provides a tunnel portal shallow-buried biased open-cut and concealed construction grouting machine that can automatically complete grouting. A tunnel portal shallow-buried biased open-cut and concealed construction grouting machine comprises a base frame, an agitator, a liquid pump, a delivery pipe, a grouting pipe and a universal wheel. The base frame is provided with an agitator for stirring the mud, the agitator is provided with a liquid pump for pumping the mud, the liquid pump is connected to the delivery pipe, the upper end of the delivery pipe is connected to a grouting pipe for grouting a small conduit, and four universal wheels are evenly rotated at the bottom of the base frame. The grouting pipe is extended into the small conduit by an electric push rod to automatically perform grouting. After the small conduit is filled with mud, the pressure control mechanism is pressurized, and the pressure control mechanism causes the grouting pipe to pop out of the small conduit without manual control, thereby avoiding mud overflow and waste.

Description

Technical Field

[0001] The invention relates to the field of tunnel construction, in particular to a grouting machine for shallow-buried, biased, open-cut and concealed construction of a tunnel portal. Background Art

[0002] As the number of tunnel engineering projects increases year by year, in some mountainous and hilly areas, affected by the terrain and geological conditions, some portal sections have biased pressure. To address this phenomenon, the existing technology is to adopt an open-cut and concealed construction process to complete the portal construction within the specified time, which not only meets the needs of on-site construction and ensures the quality of on-site construction, but also greatly improves the safety of portal construction. During the construction process, the installed steel arch frame is fixed through a small guide tube, and the support and fixation of the cave top are carried out. After the small guide tube is installed, the small guide tube is grouted to improve its stability.

[0003] Generally, when grouting, it is necessary to build a frame at the entrance of the hole, and then the workers climb up the frame and use the grouting machine to grout the small tubes one by one. In this way, the workers are prone to fall when climbing the frame, which poses a safety hazard. In addition, the method of grouting the small tubes with a handheld grouting pipe is cumbersome to operate, which affects the construction period. In addition, when grouting, it is difficult to know whether the inside of the small tube is fully grouted. Grouting can only be stopped when the mud overflows, resulting in waste of mud overflow.

[0004] In view of the above reasons, it is necessary to design a tunnel portal shallow buried biased open excavation and concealed construction grouting machine that can automatically complete grouting. Summary of the Invention

[0005] In order to overcome the disadvantage of the existing method of manually operating a grouting machine to grout small conduits, which is relatively cumbersome, the present invention provides a tunnel portal shallow buried biased open-cut and concealed construction grouting machine that can automatically complete grouting.

[0006] The technical implementation scheme of the present invention is: a grouting machine for shallow buried biased open excavation and concealed construction of a tunnel portal, including a base frame, an agitator, a liquid pump, a delivery pipe, a grouting pipe and a universal wheel. The base frame is equipped with an agitator for stirring the mud, the agitator is equipped with a liquid pump for pumping the mud, the liquid pump is connected to the delivery pipe, the upper end of the delivery pipe is connected to a grouting pipe for grouting a small conduit, four universal wheels are evenly rotated at the bottom of the base frame, and the machine also includes a propulsion mechanism, a moving mechanism and a pressure control mechanism. The grouting pipe is provided with a propulsion mechanism that can automatically push the grouting pipe into the small conduit, the feeding mechanism is provided with a moving mechanism that can automatically move the grouting pipe so that the grouting pipe is aligned with the entrance of the small conduit, and the moving mechanism is provided with a pressure control mechanism that automatically pops out the grouting pipe after grouting in the small conduit is completed.

[0007] Furthermore, the propulsion mechanism includes a piston rod, a telescopic block, a tension spring, an electric push rod, a moving block and a magnet ring. The piston rod is fixed on the grouting pipe, and the telescopic block is slidably provided on the piston rod. The telescopic block is clamped with the grouting pipe. The electric push rod telescopic rod is connected to the telescopic block. The electric push rod is located above the grouting pipe. A tension spring is connected between the telescopic block and the piston rod. The moving block is fixed on the electric push rod. A magnet ring is fixed on the outside of the piston rod to improve the tightness with the inside of the small catheter.

[0008] The two gears are connected with each other by a spring, and the two gears are connected with each other by a spring, and the two gears are connected with each other by a spring, and the two gears are connected with each other by a spring.

[0009] Furthermore, the pressure control mechanism includes a support rod, a latch, a torsion spring, a sliding rod, a contact rod, a torsion spring, a compression spring and a rack. A support rod is symmetrically fixed on one side of the fixed frame close to the grouting pipe, and the support rods are connected with latches for common rotation. The connection between the latch and the support rod is coated with damping material to make the latch rotate slowly. Two torsion springs are connected between the latch and the support rod. A sliding rod is slidingly provided on the piston rod, and the sliding rod is clamped with the grouting pipe. A compression spring is connected between the sliding rod and the piston rod. A contact rod is rotatably provided on the side of the sliding rod close to the latch, and a torsion spring is connected between the contact rod and the sliding rod. The contact rod is in contact with the latch, and a rack is fixed to the bottom of the grouting pipe, and the rack is close to the latch and can contact it.

[0010] Furthermore, it also includes a limiting mechanism, which includes a connecting rod, a screw and a limiting block. A connecting rod is fixed on the side of the support block close to the conveying wheel, and a screw is threadedly connected to the connecting rod. A limiting block is rotatably provided on the screw for clamping the steel arch frame to improve the stability of the moving mechanism.

[0011] Furthermore, it also includes a sealing mechanism, which includes a fixed rod, a sealing disk and a return spring. A fixed rod is slidably provided on one of the rotating rods, and a sealing disk is fixed on the fixed rod for blocking the small tube to prevent mud from overflowing. A return spring is connected between the sealing disk and a nearby rotating rod, and the return spring is sleeved on the fixed rod.

[0012] Furthermore, it also includes a roller, and the bottom of the moving block is evenly rotated and provided with a roller for assisting the movement of the moving block.

[0013] Furthermore, it also includes balls, and the limiting block is evenly hinged with balls for making the limiting block move more smoothly.

[0014] The present invention has the following advantages:

[0015] 1. The electric push rod carries the grouting pipe into the small conduit for automatic grouting. After the small conduit is filled with mud, the pressure control mechanism is pressurized, and the pressure control mechanism causes the grouting pipe to pop out of the small conduit. No manual control is required, thus avoiding mud overflow and waste.

[0016] 2. After the grouting of a small conduit is completed, the grouting pipe can be moved to the next small conduit for grouting through the moving mechanism, and the grouting can be carried out in sequence to achieve the purpose of automatic grouting, improve the overall work efficiency, and save the trouble of manual operation;

[0017] 3. By rotating the screw, the limit block clamps the rear side of the steel arch frame, which can play a reinforcing role and improve the overall stability of the moving mechanism. At the same time, the ball assists the movement of the limit block;

[0018] 4. After completing the grouting of a small conduit, when the grouting pipe moves to the next small conduit, the sealing plate will block the small conduit that has just been grouted to prevent the mud from flowing out and facilitate the staff to seal it later. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention.

[0020] Figure 2 This is a usage state diagram of the present invention.

[0021] Figure 3 It is a schematic diagram of the three-dimensional structure of the propulsion mechanism of the present invention.

[0022] Figure 4 It is a partial three-dimensional structural schematic diagram of the propulsion mechanism of the present invention.

[0023] Figure 5 It is a schematic diagram of the three-dimensional structure of the moving mechanism of the present invention.

[0024] Figure 6 It is a partial cross-sectional three-dimensional structural schematic diagram of the moving mechanism of the present invention.

[0025] Figure 7 This is a schematic diagram of the first three-dimensional structure of the pressure control mechanism of the present invention.

[0026] Figure 8 This is a schematic diagram of the second three-dimensional structure of the pressure control mechanism of the present invention.

[0027] Figure 9 This is a schematic diagram of the first three-dimensional structure of the limiting mechanism of the present invention.

[0028] Figure 10 This is a schematic diagram of the second three-dimensional structure of the limiting mechanism of the present invention.

[0029] Figure 11 It is a schematic diagram of the three-dimensional structure of the screw, limit block and roller of the present invention.

[0030] Figure 12 It is a schematic diagram of the three-dimensional structure of the moving block and the ball of the present invention.

[0031] In the above figures: 1: base frame, 2: agitator, 3: liquid pump, 4: delivery pipe, 5: grouting pipe, 6: universal wheel, 7: propulsion mechanism, 71: piston rod, 72: telescopic block, 73: tension spring, 74: electric push rod, 75: moving block, 76: magnet ring, 8: moving mechanism, 81: support block, 82: transmission shaft, 83: rotating rod, 84: hinged rod, 85: push rod, 86: fixed frame, 87: slide rod, 88: delivery wheel, 89: electric push rod, Machine, 810: synchronous belt, 811: clamping spring, 9: pressure control mechanism, 91: support rod, 92: latching tooth, 93: torsion spring, 94: sliding rod, 95: contact rod, 96: torsion spring, 97: compression spring, 98: rack, 10: limiting mechanism, 101: connecting rod, 102: screw, 103: limiting block, 11: roller, 12: blocking mechanism, 121: fixing rod, 122: blocking disk, 123: return spring, 13: ball. DETAILED DESCRIPTION

[0032] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0033] Example 1

[0034] A tunnel portal shallow buried bias pressure open excavation and concealed construction grouting machine, such as Figure 1-2As shown, it includes a base frame 1, an agitator 2, a liquid pump 3, a delivery pipe 4, a grouting pipe 5, a universal wheel 6, a propulsion mechanism 7, a moving mechanism 8 and a pressure control mechanism 9. The base frame 1 is provided with a stirrer 2 for stirring the mud, and the right side of the agitator 2 is provided with a liquid pump 3 for pumping the mud. The liquid pump 3 is connected to the delivery pipe 4, and the upper end of the delivery pipe 4 is connected to the grouting pipe 5 for grouting the small conduit. Four universal wheels 6 are evenly rotated at the bottom of the base frame 1, and the grouting pipe 5 is provided with a propulsion mechanism 7 that can automatically push the grouting pipe 5 into the small conduit. The feeding mechanism is provided with a moving mechanism 8 that can automatically move the grouting pipe 5 so that the grouting pipe 5 is aligned with the entrance of the small conduit. The moving mechanism 8 is provided with a pressure control mechanism 9 that automatically pops out the grouting pipe 5 after the grouting in the small conduit is completed.

[0035] like Figure 1 、 Figure 2 、 Figure 3 and Figure 4 As shown, the propulsion mechanism 7 includes a piston rod 71, a telescopic block 72, a tension spring 73, an electric push rod 74, a moving block 75 and a magnet ring 76. The piston rod 71 is fixed on the grouting pipe 5. The telescopic block 72 is slidably provided on the piston rod 71. The telescopic block 72 is clamped with the grouting pipe 5. The electric push rod 74 is connected to the telescopic block 72. The electric push rod 74 is located above the grouting pipe 5. A tension spring 73 is connected between the telescopic block 72 and the piston rod 71. A moving block 75 is fixed on the electric push rod 74. A magnet ring 76 is fixed on the outside of the piston rod 71 to improve the tightness with the inside of the small catheter.

[0036] like Figure 1 、 Figure 2 、 Figure 5 and Figure 6 As shown, the moving mechanism 8 includes a support block 81, a transmission shaft 82, a rotating rod 83, a hinged rod 84, a pushing rod 85, a fixed frame 86, a slide bar 87, a conveying wheel 88, a motor 89, a synchronous belt 810 and a clamping spring 811. The front side of the moving block 75 is symmetrically bolted with slide bars 87. The two slide bars 87 are both slidably and rotatably provided with rotating rods 83. The two transmission shafts 82 are rotatably connected to the inside of the support block 81. The lower sides of the two rotating rods 83 are rotatably connected to the adjacent transmission shafts 82. A fixed frame 86 is fixed in the middle of the support block 81. The lower sides of the two rotating rods 83 are There are two hinged rods 84, and each of the hinged rods 84 is hinged with a push rod 85. The push rods 85 are slidably connected to the fixed frame 86. A clamping spring 811 is connected between the push rod 85 and the inside of the fixed frame 86. The clamping spring 811 always has a tendency to move the corresponding two push rods 85 away from each other. A conveying wheel 88 is fixed on the rear side of the transmission shaft 82, and a motor 89 is installed on the left side of the front of the support block 81. The output shaft of the motor 89 is connected to the left transmission shaft 82. A synchronous belt 810 is sleeved on the two transmission shafts 82, and the synchronous belt 810 is located inside the support block 81.

[0037] like Figure 1 、 Figure 2 、 Figure 7 and Figure 8 As shown, the pressure control mechanism 9 includes a support rod 91, a latch tooth 92, a torsion spring 93, a sliding rod 94, a contact rod 95, a torsion spring 96, a compression spring 97 and a rack 98. The support rods 91 are symmetrically fixed on the left and right sides of the front side of the fixed frame 86. The support rods 91 are connected with latch teeth 92 for common rotation. The connection between the latch teeth 92 and the support rods 91 is coated with damping material to make the latch teeth 92 rotate slowly. The left and right sides of the latch teeth 92 are connected to the adjacent support rods 91. A sliding rod 94 is slidingly provided on the piston rod 71. The sliding rod 94 is engaged with the grouting pipe 5. A compression spring 97 is connected between the sliding rod 94 and the piston rod 71. A contact rod 95 is rotatably provided on the front side of the sliding rod 94. A torsion spring 96 is connected between the contact rod 95 and the sliding rod 94. The contact rod 95 contacts the latch teeth 92. A rack 98 is fixed to the bottom of the grouting pipe 5. The rack 98 moves backward to contact the latch teeth 92.

[0038] Due to the influence of geological conditions in some areas, the tunnel entrance section has serious bias pressure. The application of open-hole and underground excavation technology to the tunnel entrance section under bias pressure can better solve this problem. When constructing tunnels in biased areas, it is necessary to first carry out construction preparation work, such as treating the vegetation on the slope, spraying and grouting the side slope, building a retaining wall at the foot of the natural slope and backfilling with gravel soil.

[0039] After these tasks are completed, Figure 2As shown, the small conduit can be inserted into the back-pressure backfill section of the cave roof, so that the small conduit is annularly located outside the installed steel arch frame. The steel arch frame is customized to match the conveying wheel 88. It is the initial support of the cave entrance and plays the role of supporting the surrounding rock. Then the small conduit needs to be grouted to improve the stability of the small conduit. It is necessary to first add 1:1 cement slurry and water glass as a quick-setting agent into the mixer 2. After the addition is completed, start the mixer 2 and make the mixer 2 work to stir and mix the cement slurry. After the mud is stirred, the device can be pushed to the side of the cave entrance. The universal wheel 6 will assist the overall movement of the device, and then the propulsion mechanism 7 and the moving mechanism 8 will be fixed on the right side of the steel arch frame, so that the moving mechanism 8 will slide from right to left along the steel arch frame ring. During the specific installation, first pull the moving block 75 upwards, and move the slide bar 87 and the electric push rod 74 upwards. The telescopic block 72 will extend, and the upward movement of the slide bar 87 will push the two rotating rods 83 to rotate closer to each other, so that the rotating rod 83 pushes the hinged rod 84 to rotate, and the hinged rod 84 will rotate. The connecting rod 84 will push the corresponding two pushing rods 85 closer to each other. Initially, the clamping spring 811 is in a compressed state. The two pushing rods 85 are closer to each other, and the clamping spring 811 continues to compress, so that the moving block 75 can be moved to the outside of the steel arch frame, so that the grouting pipe 5 is aligned with the first small guide tube, and the two conveying wheels 88 are located on the inside of the steel arch frame, so that the conveying wheels 88 are clamped with the inside of the steel arch frame. The inside of the steel arch frame has a protrusion that cooperates with the conveying wheels 88. When the conveying wheels 88 move along the steel arch frame, it is more stable. Then release the moving block 75, so that the clamping spring 811 rebounds and resets to the initial state, and then the corresponding two push rods 85 move away from each other, so that the pushing rod 85 pushes the hinged rod 84 to rotate in the opposite direction, and the hinged rod 84 pushes the two rotating rods 83 to rotate away from each other, so that the rotating rod 83 drives the moving block 75 to move downward to clamp the steel arch frame, and the moving block 75 also moves the electric push rod 74 and the telescopic block 72 downward to reset, and the compression force of the clamping spring 811 causes the moving block 75 and the conveying wheel 88 to clamp the steel arch frame.

[0040] Then, the telescopic rod of the electric push rod 74 is controlled to retract from the initially extended state, so that the telescopic rod drives the telescopic block 72 to move backward, and the telescopic block 72 can push the grouting pipe 5, the piston rod 71 and the magnet ring 76 to move backward. The grouting pipe 5 simultaneously drives the sliding rod 94, the rack 98 and the contact rod 95 to move backward, and the rack 98 will come into contact with the tooth 92. During the movement of the rack 98, the tooth 92 will be pushed to rotate in both positive and negative directions, causing the torsion spring 93 to deform and reset repeatedly. When the contact rod 95 moves back to contact with the tooth 92, the contact rod 95 will be squeezed and rotated downward, causing the torsion spring 96 to deform. After the contact rod 95 passes over the tooth 92, it rebounds and resets through the torsion spring 96. After entering the small conduit, the magnet ring 76 will also contact the inner wall of the small conduit, and then be attracted to the inside of the small conduit through magnetism to improve the tightness. After the grouting pipe 5 enters the small conduit, the electric push rod 74 will automatically extend and reset, thereby driving the telescopic block 72 to move forward. Because the locking tooth 92 cannot move directly to the front side over the rack 98, the piston rod 71 is indirectly stuck, and the telescopic block 72 moves to the front side, pulling the tension spring 73 to stretch the tension spring 73. Then the liquid pump 3 can be started to make the liquid pump 3 pump the cement slurry in the agitator 2 into the delivery pipe 4, and then flow out from the grouting pipe 5 through the delivery pipe 4 into the small conduit. There is a plum blossom-shaped groove on the small conduit, and the cement slurry will flow out into the slope through the groove to ensure that the mud is fully diffused.

[0041] The inside of the small tube will gradually be filled with mud, and the mud will contact the sliding rod 94. When the mud is filled, the mud will push the sliding rod 94 to move forward, compressing the compression spring 97. The sliding rod 94 moving forward will drive the contact rod 95 to move forward, so that the contact rod 95 contacts the tooth 92, pushing the tooth 92 to rotate downward, causing the torsion spring 93 to deform, and the tooth 92 will no longer block the rack 98. At this time, the piston rod 71 will move forward due to the reset of the tension spring 73, thereby driving the magnet ring 76, the grouting pipe 5 and the rack 98 to move forward. Move, and the compression spring 97 will gradually reset. After the contact rod 95 is disengaged from the latch tooth 92, the latch tooth 92 will reverse due to the reset of the torsion spring 93. At the same time, it will slowly rotate and reset due to the damping material, providing time for the grouting pipe 5 to reset, so that the grouting pipe 5 can be completely popped out from the inside of the small catheter. In this way, the grouting of a small catheter is completed, and the outlet of the grouting small catheter can be blocked to prevent mud from flowing out. In this way, the pressure control mechanism 9 can be used to automatically pop out after the small catheter is filled with mud. There is no need for human control, and the grouting can be guaranteed to be complete and sufficient.

[0042] Then the remaining small conduits can be grouted. According to the number of small conduits and the distance between the two small conduits, the motor 89 can be controlled by setting a programming method, so that the propulsion mechanism 7 and the moving mechanism 8 automatically stop when they move the grouting pipe 5 along the steel arch to the next small conduit. The output shaft of the motor 89 rotates to drive the transmission shaft 82 on the left and the conveying wheel 88 on the left to rotate. The transmission shaft 82 on the left can drive the transmission shaft 82 on the right and the conveying wheel 88 on the right to rotate through the synchronous belt 810. The rotation of the conveying wheel 88 will move along the inside of the steel arch. By being connected with the steel arch, the movement is smoother and less prone to slipping. The delivery wheel 88 will move the moving mechanism 8, the pressure control mechanism 9 and the propulsion mechanism 7 as a whole. The propulsion mechanism 7 will move with the grouting pipe 5 and align the grouting pipe 5 with the next small conduit. The motor 89 will be in standby mode, and the above operation can be repeated to grout this small conduit. After the grouting is completed, the grouting pipe 5 is brought to the next small conduit by the motor 89. In this way, the grouting pipe 5 can be grouted one by one into the small conduits through the moving mechanism 8. There is no need for the staff to hold the grouting pipe 5 to complete the grouting work, which is more labor-saving. Finally, after all the small conduits are grouted, the delivery wheel 88 and the moving block 75 can be removed from the steel arch frame.

[0043] Example 2

[0044] On the basis of Example 1, Figure 1 、 Figure 2 、 Figure 9 and Figure 10 As shown, it also includes a limiting mechanism 10, which includes a connecting rod 101, a screw 102 and a limiting block 103. The connecting rod 101 is fixed to the rear side of the support block 81, and the screw 102 is threadedly connected to the connecting rod 101. The front side of the screw 102 is rotatably provided with a limiting block 103 for clamping the steel arch frame to improve the stability of the moving mechanism 8.

[0045] After the steel arch frame is clamped by the conveying wheel 88 and the moving block 75, the limiting mechanism 10 is located as a whole behind the steel arch frame. The screw 102 can be rotated to make the screw 102 move with the limiting block 103 in the direction close to the steel arch frame. The position of the limiting block 103 can be adjusted so that the limiting block 103 is stuck in the slide groove on the rear side of the steel arch frame. The slide groove is formed during the assembly process of the steel arch frame. The limiting block 103 can play a role in reinforcing the moving mechanism 8, and the moving mechanism 8 is more stable when moving along the steel arch frame. Finally, after the grouting of the small guide tube is completed, the screw 102 is reversed to move with the limiting block 103 in the direction away from the steel arch frame, so that the limiting block 103 no longer clamps the steel arch frame, making it convenient to remove the moving mechanism 8.

[0046] like Figure 1 and Figure 6As shown, a sealing mechanism 12 is also included, which includes a fixed rod 121, a sealing disk 122 and a return spring 123. A fixed rod 121 is slidably provided on the right rotating rod 83, and a sealing disk 122 is fixed on the fixed rod 121 for blocking the small tube to prevent mud from overflowing. A return spring 123 is connected between the sealing disk 122 and the right rotating rod 83, and the return spring 123 is sleeved on the fixed rod 121.

[0047] When grouting a small conduit, the rotating rod 83 on the right will move with the fixed rod 121 and the blocking plate 122. When the blocking plate 122 contacts the small conduit that has just been grouted, it will be squeezed and moved forward, moving the fixed rod 121 forward, and the return spring 123 will be compressed. After the blocking plate 122 is aligned with the small conduit, the blocking plate 122 will move backward with the fixed rod 121 due to the reset of the return spring 123, and then be stuck in the small conduit, thereby blocking the small conduit that has just been grouted. The grouting pipe 5 is also aligned with the next small conduit, and then the grouting work is carried out. In this way, when grouting the next small conduit is carried out, the previous small conduit that has just been grouted can be blocked, which is convenient for the subsequent staff to block the small conduit and avoid the moving mechanism 8 taking up a large space affecting the staff's operation.

[0048] like Figure 12 As shown, the moving block 75 further includes a roller 11. The roller 11 is evenly rotated at the bottom of the moving block 75. When the moving block 75 moves, the roller 11 can rotate by friction with the steel arch frame, so that the moving block 75 moves more smoothly.

[0049] like Figure 11 As shown, it also includes balls 13. The front side of the limiting block 103 is evenly hinged with balls 13. The limiting block 103 moves more smoothly along the steel arch frame, playing a role in assisting movement.

[0050] The above embodiments are provided to persons familiar with the art for implementing or using the present invention. Personnel familiar with the art may make various modifications or changes to the above embodiments without departing from the inventive concept of the present invention. Therefore, the scope of protection of the present invention is not limited to the above embodiments, but should be the maximum scope of the innovative features mentioned in the claims.

Claims

1. A tunnel portal shallow buried bias pressure open excavation and concealed construction grouting machine, comprising a base frame (1), a stirrer (2), a liquid pump (3), a delivery pipe (4), a grouting pipe (5) and a universal wheel (6), wherein the base frame (1) is provided with a stirrer (2) for stirring the slurry, the stirrer (2) is provided with a liquid pump (3) for pumping the slurry, the liquid pump (3) is connected to the delivery pipe (4), the upper end of the delivery pipe (4) is connected to the grouting pipe (5) for grouting a small conduit, and the base frame (1) is provided with four universal wheels (6) at the bottom thereof for uniform rotation, ... stirrer (2) is provided with a liquid pump (3) for pumping the slurry, the stirrer (2) is provided with a liquid pump (3) for pumping the slurry, the stirrer (2) is provided with a liquid pump (3) for pumping the slurry, the stirrer (2) is provided with a liquid pump (3) for pumping the slurry, the stirrer (2) is provided with a liquid pump (3) for pumping the slurry, the stirrer (2) is provided with a liquid pump (3) for pumping the slurry, the It also includes a propulsion mechanism (7), a moving mechanism (8) and a pressure control mechanism (9), wherein the grouting pipe (5) is provided with a propulsion mechanism (7) capable of automatically pushing the grouting pipe (5) into the interior of the small conduit, the feeding mechanism is provided with a moving mechanism (8) capable of automatically moving the grouting pipe (5) so as to align the grouting pipe (5) with the inlet of the small conduit, and the moving mechanism (8) is provided with a pressure control mechanism (9) capable of automatically popping out the grouting pipe (5) after grouting is completed in the small conduit; The propulsion mechanism (7) includes a piston rod (71), a telescopic block (72), a tension spring (73), an electric push rod (74), a moving block (75) and a magnet ring (76). The piston rod (71) is fixed on the grouting pipe (5). The piston rod (71) is provided with a telescopic block (72) in a sliding manner. The telescopic block (72) is clamped with the grouting pipe (5). The electric push rod (74) is connected to the telescopic block (72). The electric push rod (74) is located above the grouting pipe (5). A tension spring (73) is connected between the telescopic block (72) and the piston rod (71). The moving block (75) is fixed on the electric push rod (74). A magnet ring (76) is fixed on the outside of the piston rod (71) to improve the tightness with the inside of the small catheter. The pressure control mechanism (9) includes a support rod (91), a latch (92), a torsion spring (93), a sliding rod (94), a contact rod (95), a torsion spring (96), a compression spring (97) and a rack (98). The support rod (91) is symmetrically fixed on one side of the fixed frame (86) close to the grouting pipe (5). The support rods (91) are connected to the latch (92) for common rotation. The connection between the latch (92) and the support rod (91) is coated with a damping material to allow the latch (92) to rotate slowly. Two torsion springs are connected between the latch (92) and the support rod (91). A spring (93) is provided on the piston rod (71) in a sliding manner. The sliding rod (94) is engaged with the grouting pipe (5). A compression spring (97) is connected between the sliding rod (94) and the piston rod (71). A contact rod (95) is rotatably provided on one side of the sliding rod (94) close to the latching tooth (92). A torsion spring (96) is connected between the contact rod (95) and the sliding rod (94). The contact rod (95) contacts the latching tooth (92). A rack (98) is fixed to the bottom of the grouting pipe (5). The rack (98) is close to the latching tooth (92) and can contact it. The invention also includes a limiting mechanism (10), which includes a connecting rod (101), a screw rod (102) and a limiting block (103). The connecting rod (101) is fixed on one side of the support block (81) close to the conveying wheel (88). The connecting rod (101) is threadedly connected to the screw rod (102). The screw rod (102) is rotatably provided with a limiting block (103) for clamping a steel arch frame to improve the stability of the moving mechanism (8).

2. A tunnel portal shallow buried biased open-cut and concealed construction grouting machine according to claim 1, characterized in that: The moving mechanism (8) includes a support block (81), a transmission shaft (82), a rotating rod (83), a hinged rod (84), a push rod (85), a fixed frame (86), a slide rod (87), a conveying wheel (88), a motor (89), a synchronous belt (810) and a clamping spring (811). The slide rods (87) are symmetrically fixed on the moving block (75). The two slide rods (87) are both slidably and rotatably provided with rotating rods (83). The two transmission shafts (82) are rotatably connected to the inside of the support block (81). The lower sides of the two rotating rods (83) are rotatably connected to the adjacent transmission shafts (82). The fixed frame (86) is fixed in the middle of the support block (81). The lower sides of the two rotating rods (83) are Two hinged rods (84) are hinged, and a push rod (85) is hinged on the hinged rod (84). The push rods (85) are slidably connected to the fixed frame (86). A clamping spring (811) is connected between the push rods (85) and the fixed frame (86). The clamping spring (811) always has a tendency to move the corresponding two push rods (85) away from each other. A conveying wheel (88) is fixed on the transmission shaft (82). A motor (89) is installed on the support block (81). The output shaft of the motor (89) is connected to a nearby transmission shaft (82). A synchronous belt (810) is sleeved on the two transmission shafts (82). The synchronous belt (810) is located inside the support block (81).

3. A tunnel portal shallow buried biased open-cut and concealed construction grouting machine according to claim 1, characterized in that: The invention also includes a blocking mechanism (12), which includes a fixed rod (121), a blocking disk (122) and a return spring (123), wherein a fixed rod (121) is slidably provided on one of the rotating rods (83), a blocking disk (122) is fixed on the fixed rod (121) for blocking the small conduit to prevent mud from overflowing, a return spring (123) is connected between the blocking disk (122) and a nearby rotating rod (83), and the return spring (123) is sleeved on the fixed rod (121).

4. A tunnel portal shallow buried biased open-cut and concealed construction grouting machine according to claim 1, characterized in that: It also includes a roller (11), and the bottom of the moving block (75) is evenly rotated and provided with a roller (11) for assisting the moving block (75) in moving.

5. A tunnel portal shallow buried biased open-cut and concealed construction grouting machine according to claim 1, characterized in that: The device further comprises a ball (13), and the ball (13) is evenly hinged on the limit block (103) for making the limit block (103) move more smoothly.

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