Jacking ejector rod and jacking device for tunnel guide pipe construction

Abstract

The invention relates to a jacking ejector rod and a jacking device for tunnel guide pipe construction, and belongs to the technical field of grouting guide pipes, the jacking ejector rod comprises an ejector rod body connected in a grouting guide pipe in a sleeved mode, the ejector rod body is slidably arranged in the grouting guide pipe in a penetrating mode, one end of the ejector rod body is provided with a conical head, the other end of the ejector rod body is provided with a jacking plate, and the jacking plate is used for being connected with the jacking device to jack the ejector rod body into a rock stratum; connecting plates are arranged between the conical head and the ejector rod and hinged to the bottom of the conical head, the hinge axis of the connecting plates is perpendicular to the axis direction of the ejector rod, and the device further comprises a first driving piece used for driving the connecting plates to rotate so that the connecting plates can obliquely cover the end of the grouting guide pipe. A reinforcing piece is arranged on the ejector rod and is used for scraping rock slag drilled by the conical head and the connecting plate on the inner wall of a formed hole so as to reinforce the formed hole; the device further comprises a recycling part which is used for recycling the connecting plate to be close to the ejector rod and taking the ejector rod out of the grouting guide pipe after the grouting guide pipe reaches the designed position. The method has the effect of improving the rock stratum reinforcing effect.

Description

Technical Field

[0001] The present application relates to the technical field of grouting conduits, and in particular to a jacking rod and a jacking device for tunnel conduit construction. Background Art

[0002] During the tunnel excavation operation, conduit construction is a very effective auxiliary construction method in the excavation of soft surrounding rock tunnels. Under the construction conditions of soft and broken rock formations, setting an advance small conduit on the arch or setting a locking foot anchor pipe on the side wall (advance small conduit and locking foot anchor pipe can be collectively referred to as conduits) can strengthen the loose rock formation. After grouting, the stability of the loose and weak surrounding rock is enhanced, which is conducive to the stability of the surrounding rock after the excavation and during the initial support time, so as to prevent the surrounding rock from becoming unstable and collapsing; the traditional conduit construction process is to drill holes first and then install the pipe or directly place the drill rod of the drilling rig against one end of the conduit and drive it into the working face.

[0003] The grouting conduit is usually made of a seamless steel pipe with a diameter of 38-50mm. The front end is made into a cone shape, a steel hoop is welded to the rear end, and an overflow hole is provided. Because the grouting conduit is hollow, and the overflow hole destroys the integrity of the grouting conduit, resulting in a decrease in the overall strength of the grouting conduit. The grouting conduit is easy to bend during the process of the grouting conduit being pushed into the rock formation. The length of the grouting conduit is usually 1-6m, which makes it easier to bend when the grouting conduit penetrates deep into the rock formation, making it difficult for the grouting conduit to be pushed into the designed position, thereby reducing the reinforcement effect on the rock formation. Summary of the invention

[0004] In order to improve the reinforcement effect on the rock formation, the present application provides a jacking rod and a jacking device for tunnel conduit construction.

[0005] In the first aspect, the present application provides a jacking rod for tunnel conduit construction, which adopts the following technical solution: A jacking device for tunnel conduit construction, comprising a jacking rod sleeved in a grouting conduit, the jacking rod slidingly inserted in the grouting conduit, the outer diameter of the jacking rod being equal to the inner diameter of the grouting conduit, one end of the jacking rod being provided with a conical head, and the other end being provided with a jacking plate, the jacking plate being used to connect the jacking device and jacking the jacking rod into a rock formation, and the jacking rod entering the rock formation drives the grouting conduit into the rock formation; The bottom diameter of the conical head is equal to the inner diameter of the grouting conduit. A plurality of connecting plates are arranged between the conical head and the mandrel. The plurality of connecting plates are hinged at the bottom of the conical head. The hinge axis of the connecting plate is perpendicular to the axis direction of the mandrel. The first driving member is also included for driving the connecting plate to rotate so that the connecting plate obliquely covers the end of the grouting conduit. The mandrel is provided with a reinforcing member, which is used to scrape the rock slag drilled by the conical head and the connecting plate onto the inner wall of the hole to reinforce the hole; It also includes a recovery piece, which is used to recover the connection plate and approach the top rod after the grouting conduit reaches the designed position, and then take the top rod out of the grouting conduit.

[0006] Optionally, the push rod includes a first rod body and a second rod body, the first rod body is coaxially arranged on the second rod body and the diameter of the first rod body is smaller than the diameter of the second rod body, the diameter of the second rod body is equal to the inner diameter of the grouting tube, the pushing plate is fixedly arranged at the end of the second rod body, the conical head is fixedly arranged at the end of the first rod body, the bottom diameter of the conical head is equal to the diameter of the second rod body, the connecting plate is hinged at the bottom of the conical head and the length direction of the initial position is parallel to the length direction of the first rod body, and the recovery component is used to recover the connecting plate close to the first rod body to remove the push rod from the grouting tube.

[0007] Optionally, the first driving member includes a connecting tube arranged in the first rod body and a push block slidably arranged in the connecting tube, the push block is opposite to the back of the connecting plate, the first driving member also includes a first water bag arranged in the connecting tube, a second water bag arranged in the first rod body, and a connecting tube for connecting the first water bag and the second water bag, a push plate is slidably arranged in the first rod body, the second water bag is located on the push plate, the first driving member also includes a second driving member for driving the push plate to slide and compress the second water bag, so that the liquid in the second water bag enters the first water bag through the connecting tube, and pushes the push block to slide out of the connecting tube and abut the connecting plate to drive the connecting plate to rotate.

[0008] Optionally, multiple connecting plates are evenly arranged along the circumferential direction of the conical head, the connecting tube is a multi-port pipe and the number of ports is equal to the number of connecting plates, the push block is slidably arranged in the port of the connecting tube, the first water bag is located in the middle of the connecting tube and is in an emitting shape, the emitting end of the first water bag is located in the port of the connecting tube, the second water bag is located between the connecting tube and the push plate, and the second driving member is used to drive the push plate to move and compress the second water bag, so that the first water bag expands along the emitting end and pushes the push block to slide and drive the connecting plate to rotate.

[0009] Optionally, the second driving member includes a micro motor disposed in the first rod body, a screw is disposed on an output shaft of the micro motor, a length direction of the screw is parallel to an axial direction of the first rod body, and the push plate is threadedly connected to the screw.

[0010] Optionally, the first water bag is located above the second water bag, and the recovery member includes a return spring arranged between the connecting plate and the first rod body, one end of the return spring is fixedly arranged on the back of the connecting plate, and the other end is fixedly arranged on the first rod body, and the return spring is used to drive the connecting plate to have a tendency to rotate toward the direction of the first rod body.

[0011] Optionally, the conical head and the connecting plate are provided with thread segments, and the thread segments on adjacent connecting plates are spaced apart and connected along the rotation direction of the thread segments.

[0012] Optionally, the connecting plates are provided with cutting blades facing the side walls of adjacent connecting plates, and the cutting blades are used to cut the rock strata between adjacent connecting plates; an elastic receiving cloth is provided between adjacent connecting plates, and both sides of the elastic receiving cloth are respectively fixed on the side walls of the connecting plates, and the cutting blades are located above the elastic receiving cloth.

[0013] Optionally, the second rod body includes multiple splicing rods, the outer diameter of the splicing rods is equal to the inner diameter of the grouting conduit, the splicing rods are coaxially spliced, the first rod body is coaxially fixed at the end of the splicing rod at the head end, the jacking plate is fixed at the end of the splicing rod at the tail end, a rectangular plug-in block is fixed at one end of the splicing rod, and a rectangular plug-in groove for plugging the plug-in block is opened at the other end.

[0014] In the second aspect, the present application provides a jacking device for tunnel conduit construction, which adopts the following technical solution: Optionally, a jacking device for tunnel conduit construction includes a jacking rod and a frame, a hydraulic cylinder and a mounting plate are provided on the frame, the mounting plate is fixedly provided on the hydraulic cylinder piston rod, a driving motor is provided on the mounting plate, a jacking block is provided on the output shaft of the driving motor, and the jacking block is used to be inserted into a rectangular jacking groove opened on the jacking plate.

[0015] In summary, the present application includes at least one of the following beneficial technical effects: 1. Before the grouting tube is driven into the rock formation, the push rod is first inserted into the grouting tube, and then the connecting plate is driven to rotate by the first driving member, and the connecting plate rotates in the direction away from the push rod, so that the connecting plate covers the end of the grouting tube. At this time, the end of the grouting tube covers the bottom of the connecting plate, and the bottom surface of the connecting plate after unfolding is larger than the outer diameter of the grouting tube. Then the jacking plate is connected to the jacking device, and the jacking device drives the push rod into the rock formation. The push rod guides the grouting tube to open a hole, so that the tube enters the rock formation without hindrance, thereby reducing the obstruction of the rock and soil layer to the grouting tube, and then reducing the possibility of bending and damage of the grouting tube, thereby improving the reinforcement effect of the rock and soil layer; 2. After the ram drives the grouting conduit to the designed position, the connecting plate is recovered by the recovery part, so that the connecting plate is close to the ram, and then the ram is taken out from the grouting conduit to facilitate the subsequent grouting operation; 3. The conical head and the connecting plate guide the grouting tube, and the channel opened by the connecting plate is larger than the diameter of the grouting tube, so that the grouting tube is separated from the hole, thereby reducing the possibility of soil in the rock and soil layer entering the overflow hole and causing blockage of the overflow hole, thereby facilitating the injection of mortar into the rock and soil layer. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the overall structure of a jacking rod for tunnel conduit construction according to an embodiment of the present application; Figure 2 It is an exploded schematic diagram of a jacking rod and a grouting conduit in a jacking rod for tunnel conduit construction in an embodiment of the present application; Figure 3 This is a schematic structural diagram of a jacking rod in a jacking rod for tunnel conduit construction according to an embodiment of the present application; Figure 4 It is a cross-sectional view of a jacking rod in a jacking rod for tunnel conduit construction according to an embodiment of the present application; Figure 5 It is a partially enlarged schematic diagram of a jacking rod in a jacking rod for tunnel conduit construction according to an embodiment of the present application; Figure 6 It is a schematic diagram of the structure of a first water bag and a second water bag in a jacking rod for tunnel conduit construction according to an embodiment of the present application; Figure 7 yes Figure 1 A magnified schematic diagram of part A; Figure 8 It is a schematic structural diagram of a reinforcing rod in a jacking rod for tunnel conduit construction according to an embodiment of the present application; Fig. 9 It is a cross-sectional view of a first rod body in a jacking rod for tunnel conduit construction according to an embodiment of the present application, and is intended to show an arc groove; Fig.10 yes Fig. 9 A magnified schematic diagram of part B; Fig.11 It is a schematic diagram of the overall structure of a jacking device for tunnel conduit construction according to an embodiment of the present application.

[0017] Description of the accompanying drawings: 1. grouting conduit; 2. top rod; 21. first rod body; 22. second rod body; 221. splicing rod; 222. plug-in block; 223. plug-in slot; 3. Conical head; 4. Jacking plate; 5. Connecting plate; 6. First driving member; 61. Push block; 62. First water bag; 63. Second water bag; 64. Connecting pipe; 65. Push plate; 66. Micro motor; 67. Screw; 68. Connecting pipe; 7. Recovery parts; 71. Return spring; 8. Threaded section; 9. Cutting blade; 10. Elastic receiving cloth; 11. Frame; 12. Pushing block; 13. Pushing slot; 14. Hydraulic cylinder; 15. Mounting plate; 16. Driving motor; 17. Transmitting end; 18. reinforcement; 181. arc plate; 182. blocking plate; 1821. circular ring; 1822. sector plate; 1823. rotating motor; 19. arc groove; 20. third water bag; 23. fourth water bag; 24. micro pump. DETAILED DESCRIPTION

[0018] The following is combined with Figure 1 -Attached Fig.11 This application is described in further detail.

[0019] The present application discloses a jacking rod for tunnel conduit construction. Figure 1 and Figure 2 The jacking rod for tunnel conduit construction includes a jacking rod 2 sleeved in a grouting conduit 1, the jacking rod 2 is slidably inserted into the grouting conduit 1, the length of the jacking rod 2 is greater than the length of the grouting conduit 1, the jacking rod 2 slides along the axial direction of the grouting conduit 1, the outer diameter of the jacking rod 2 is equal to the inner diameter of the grouting conduit 1, one end of the jacking rod 2 is provided with a conical head 3, and the other end is provided with a jacking plate 4, the jacking plate 4 is used to connect the jacking device to lift the jacking rod 2 into the rock formation, and the jacking rod 2 enters the rock formation to drive the grouting conduit 1 into the rock formation; Combination Figure 3 and Figure 4 The bottom diameter of the conical head 3 is equal to the inner diameter of the grouting conduit 1. A plurality of connecting plates 5 are provided between the conical head 3 and the top rod 2. The plurality of connecting plates 5 are hinged at the bottom of the conical head 3. The hinge axis of the connecting plate 5 is perpendicular to the axis direction of the top rod 2. The first driving member 6 is also included for driving the connecting plate 5 to rotate so that the connecting plate 5 obliquely covers the end of the grouting conduit 1. Reference Figure 1 and Figure 2 A reinforcing member 18 is provided on the top rod 2, and the reinforcing member 18 is used to scrape the rock slag drilled by the conical head 3 and the connecting plate 5 onto the inner wall of the hole to reinforce the hole; The grouting conduit 1 further comprises a recovery member 7 , which is used to recover the connection plate 5 and move it close to the top rod 2 after the grouting conduit 1 reaches the designed position, and to remove the top rod 2 from the grouting conduit 1 .

[0020] Before the grouting tube 1 is driven into the rock formation, the push rod 2 is first inserted into the grouting tube 1, and then the connecting plate 5 is driven to rotate by the first driving member 6. The connecting plate 5 rotates in the direction away from the push rod 2, so that the connecting plate 5 covers the end of the grouting tube 1. At this time, the end of the grouting tube 1 covers the bottom of the connecting plate 5, and the bottom diameter of the connecting plate 5 after unfolding is larger than the outer diameter of the grouting tube 1. Then the jacking plate 4 is connected to the jacking device, and the jacking device drives the push rod 2 into the rock formation. The push rod 2 guides the grouting tube 1 to open a hole, so that the grouting tube 1 can enter the rock formation without hindrance, thereby reducing the obstruction of the rock and soil layer to the grouting tube 1, and then reducing the possibility of bending and damage of the grouting tube 1, thereby improving the reinforcement effect of the rock and soil layer. Compared with drilling a hole first and then driving the grouting conduit 1, during the process of the grouting conduit 1 entering the hole, the grouting conduit 1 is relatively long, and there is a possibility that the grouting conduit 1 bends and abuts against the inner wall of the hole. When the grouting conduit 1 abuts against the inner wall of the hole, the rock and soil layer is easy to enter the grouting conduit 1, making grouting difficult; at the same time, when the grouting conduit 1 abuts against the inner wall of the hole, under the action of the jacking device, the bending degree of the grouting conduit 1 is easy to increase, resulting in damage to the hole and the grouting conduit 1. And under the action of the jack 2, the grouting conduit 1 made of plastic can be used, compared with the metal grouting conduit 1, the cost of reinforcing the rock and soil layer is reduced; at the same time, under the action of the reinforcement member 18, the rock slag generated by drilling and forming is coated on the inner wall of the hole, and the hole reinforcement operation is carried out, thereby reducing the possibility of hole collapse. At the same time, the rock slag is coated on the inner wall of the hole, which has the advantages of fast hole forming speed and low construction cost compared with the removal of rock slag.

[0021] Reference Figure 4 In the embodiment of the present application, in order to facilitate the removal of the push rod 2 from the grouting conduit 1, the push rod 2 includes a first rod body 21 and a second rod body 22, the first rod body 21 is coaxially arranged on the second rod body 22 and the diameter of the first rod body 21 is smaller than the diameter of the second rod body 22, the diameter of the second rod body 22 is equal to the inner diameter of the grouting conduit 1, the push plate 4 is fixedly arranged at the end of the second rod body 22, the conical head 3 is fixedly arranged at the end of the first rod body 21, the bottom diameter of the conical head 3 is equal to the diameter of the second rod body 22, the connecting plate 5 is hinged at the bottom of the conical head 3 and the length direction of the initial position is parallel to the first rod body In the length direction of 21, the recovery member 7 is used to recover the connecting plate 5 close to the first rod body 21 and take the top rod 2 out of the grouting conduit 1; because the diameter of the first rod body 21 is smaller than the diameter of the second rod body 22, the connecting plate 5 is completely located under the conical head 3 under the action of the recovery member 7, which is convenient for moving the top rod 2 out of the grouting conduit 1; and after the recovery member 7 recovers the connecting plate 5, one end of the connecting plate 5 abuts against the outer wall of the first rod body 21. At this time, the connecting plate 5 is in an inclined state, and guides the conical head 3 to enter the grouting conduit 1, which is convenient for the conical head 3 to enter the grouting conduit 1.

[0022] Reference Figure 4and Figure 5 In the embodiment of the present application, the first driving member 6 includes a connecting tube 68 disposed in the first rod body 21 and a push block 61 slidably disposed in the connecting tube 68, the push block 61 is directly opposite to the back of the connecting plate 5, the first driving member 6 also includes a first water bag 62 disposed in the connecting tube 68, a second water bag 63 disposed in the first rod body 21, and a connecting tube 64 for connecting the first water bag 62 and the second water bag 63, a push plate 65 is slidably disposed in the first rod body 21, the second water bag 63 is located on the push plate 65, the first driving member 6 also includes a second driving member for driving the push plate 65 to slide and compress the second water bag 63, so that the liquid in the second water bag 63 enters the first water bag 62 through the connecting tube 64, and pushes the push block 61 to slide out of the connecting tube 68 and abut against the connecting plate 5 to drive the connecting plate 5 to rotate; Reference Figure 4 and Figure 5 The second driving member includes a micro motor 66 disposed in the first rod body 21 , a screw 67 is disposed on the output shaft of the micro motor 66 , the length direction of the screw 67 is parallel to the axial direction of the first rod body 21 , and the push plate 65 is threadedly connected to the screw 67 .

[0023] When driving the connecting plate 5 to rotate, the micro motor 66 is started, and the micro motor 66 drives the screw 67 to rotate. The rotation of the screw 67 drives the push plate 65 to move toward the second water bag 63. The push plate 65 compresses the second water bag 63, so that the liquid in the second water bag 63 enters the first water bag 62 through the connecting tube 64. The volume of the first water bag 62 increases and pushes the push block 61 to slide. The push block 61 slides and abuts against the connecting plate 5 to rotate. The operation is simple and convenient. Moreover, the push plate 65 is fixed in the position after the movement by the screw 67, so that the second water bag 63 and the first water bag 62 remain in a compressed or expanded state, and the push block 61 remains in the above state, which is convenient for maintaining the position of the connecting plate 5.

[0024] Reference Figure 4 , Figure 5 and Figure 6In the embodiment of the present application, in order to facilitate the connection plate 5 to rotate at the same angle and speed, multiple connection plates 5 are evenly arranged along the circumferential direction of the conical head 3, the connecting pipe 68 is a multi-port pipe and the number of ports is equal to the number of connection plates 5, the push block 61 is slidably arranged in the port of the connecting pipe 68, the first water bag 62 is located in the middle of the connecting pipe 68 and is in an emitting shape, the emission end 17 of the first water bag 62 is located in the port of the connecting pipe 68, the second water bag 63 is located between the connecting pipe 64 and the push plate 65, and the second driving member is used to drive the push plate 65 to move and compress the second water bag 63, so that the first water bag 62 expands along the emission end 17 and pushes the push block 61 to slide and drive the connection plate 5 to rotate. When the micro push rod drives the screw 67 to rotate and drives the push plate 65 to compress the second water bag 63, the second water bag 63 is crimped between the push plate 65 and the connecting tube 68, so that the liquid in the second water bag 63 enters the first water bag 62, and the liquid in the middle of the first water bag 62 enters the launch end 17 of the first water bag 62. The launch end 17 of the first water bag 62 expands and drives the push block 61 to move, thereby driving all the connecting plates 5 to rotate at the same angle, time and speed, so as to facilitate the drilling operation of the connecting plates 5 on the rock and soil layers.

[0025] Reference Figure 4 , Figure 5 and Figure 6 In the embodiment of the present application, when the micro motor 66 drives the push plate 65 to separate from the second water bag 63, in order to accelerate the liquid in the first water bag 62 to enter the second water bag 63, the fixing effect of the push block 61 on the connecting plate 5 is released, and the first water bag 62 is located above the second water bag 63.

[0026] Reference Figure 4 and Figure 5 In the embodiment of the present application, the recovery member 7 includes a return spring 71 arranged between the connecting plate 5 and the first rod body 21, one end of the return spring 71 is fixedly arranged on the back of the connecting plate 5, and the other end is fixedly arranged on the first rod body 21, and the return spring 71 is used to drive the connecting plate 5 to have a tendency to rotate toward the first rod body 21; when the push block 61 is separated from the connecting plate 5, under the action of the elastic force of the return spring 71, the connecting plate 5 is pulled to rotate toward the first rod body 21, and the end of the connecting plate 5 away from the conical head 3 abuts against the first rod body 21, thereby facilitating the conical head 3 to enter the grouting conduit 1, and facilitating the removal of the top rod 2 and the conical head 3 from the grouting conduit 1.

[0027] Reference Figure 4 and Figure 5 In order to speed up the drilling efficiency of the push rod 2, threaded sections 8 are provided on the conical head 3 and the connecting plate 5, and the threaded sections 8 on adjacent connecting plates 5 are spaced apart and connected along the rotation direction of the threaded sections 8; under the action of the threaded sections 8, it is convenient for the conical head 3 and the connecting plate 5 to drill the rock and soil layer, and it is convenient for the push rod 2 to enter the rock and soil layer.

[0028] Reference Figure 1and Figure 7 Furthermore, when the conical head 3 and the connecting plate 5 rotate and drill the rock and soil layer, the rock and soil layer is easy to enter between adjacent connecting plates 5, reducing the rotational drilling efficiency of the rock and soil layer. Therefore, in the embodiment of the present application, the connecting plate 5 is provided with a cutting blade 9 facing the side wall of the adjacent connecting plate 5, and the cutting blade 9 is used to cut the rock layer between the adjacent connecting plates 5; when entering the rock and soil layer between the connecting plates 5, under the action of the cutting blade 9, it is easy to separate the rock and soil layer, thereby accelerating the drilling efficiency of the rock and soil layer.

[0029] Reference Figure 1 and Figure 7 Furthermore, an elastic receiving cloth 10 is arranged between adjacent connecting plates 5, and the two sides of the elastic receiving cloth 10 are respectively fixed on the side walls of the connecting plates 5, and the cutting blade 9 is located above the elastic receiving cloth 10; after the connecting plates 5 are unfolded, the elastic receiving cloth 10 covers the gap between the connecting plates 5, so that the rock and soil layer cut by the cutting blade 9 slides along the elastic receiving cloth 10, thereby reducing the influence of the drilled rock and soil on the grouting conduit 1.

[0030] Reference Figure 4 In the embodiment of the present application, the second rod body 22 includes a plurality of splicing rods 221, the outer diameter of the splicing rod 221 is equal to the inner diameter of the grouting conduit 1, the splicing rods 221 are coaxially spliced, the first rod body 21 is coaxially fixedly arranged at the end of the splicing rod 221 at the head end, and the jacking plate 4 is fixedly arranged at the end of the splicing rod 221 at the tail end, a rectangular plug-in block 222 is fixedly arranged at one end of the splicing rod 221, and a rectangular plug-in groove 223 for plugging the plug-in block 222 is opened at the other end; the second rod body 22 adopts a plurality of splicing rods 221, and the length of the single splicing rod 221 is reduced, thereby reducing the possibility of bending of the second rod body 22; and the plurality of splicing rods 221 are spliced ​​and spliced ​​by the plug-in block 222 and the plug-in groove 223, thereby extending the length of the second rod body 22, thereby facilitating the jacking of the grouting conduit 1 to the designed depth.

[0031] Reference Figure 1 , Figure 8 and Fig. 9 In the embodiment of the present application, the reinforcement member 18 includes an arc-shaped plate 181 arranged on the first rod body 21 and blocking plates 182 located on both sides of the arc-shaped plate 181. The blocking plate 182 is arranged on the first rod body 21, and the peripheral wall abuts against the inner wall of the hole. The arc-shaped plate 181 is C-shaped, and the arc-shaped plate 181 is slidably arranged in the first rod body 21. An arc-shaped groove 19 for sliding the arc-shaped plate 181 is provided in the first rod body 21. The width direction of the arc-shaped plate 181 is parallel to the length direction of the first rod body 21. There are three blocking plates 182 and they are evenly arranged along the circumference of the first rod body 21. After the arc-shaped plate 181 is moved out of the arc-shaped groove 19, the end face of the arc-shaped plate 181 is consistent with the height of the rear end of the connecting plate 5 after rotation.

[0032] After the conical head 3 and the connecting plate 5 are unfolded, the rock stratum is drilled, and the rock debris and the soil layer fall from the conical head 3 to between the two blocking plates 182 and fall between the adjacent arc plates 181. When the second rod body 22 rotates to drive the first rod body 21 to rotate, the first rod body 21 rotates to drive the arc plate 181 to rotate. When the arc plate 181 rotates, it drives the rock stratum and the soil layer to move toward the inner wall of the hole, and under the action of the end of the arc plate 181, the rock debris and the soil layer are smeared on the inner wall of the hole, and the inner wall of the hole is reinforced. The operation is simple and convenient.

[0033] Reference Fig. 9 and Fig.10 In order to facilitate the removal of the arc plate 181 and the blocking plate 182 from the grouting conduit 1 along with the first rod body 21, in the implementation of the present application, a third water bag 20 is arranged in the first rod body 21 and located in the arc groove 19, and a fourth water bag 23 is arranged in the first rod body 21. The third water bag 20 and the fourth water bag 23 are connected to each other, and the end of the arc plate 181 located in the arc groove 19 is fixedly connected to the third water bag 20. A micro pump 24 is arranged between the third water bag 20 and the fourth water bag 23. The micro pump 24 is used to extract water in the fourth water bag 23 into the third water bag 20, and drive the arc plate 181 to move out of the arc groove 19 and abut against the inner wall of the hole.

[0034] Reference Figure 8 and Fig. 9 Further, the blocking plate 182 includes a ring 1821 sleeved on the first rod body 21 and a fan-shaped plate 1822 rotatably arranged on the ring 1821, a plurality of fan-shaped plates 1822 are provided, and are evenly arranged along the circumference of the ring 1821, the rotation axis of the fan-shaped plate 1822 is perpendicular to the axis direction of the first rod body 21, and a plurality of fan-shaped plates 1822 are spliced ​​to form a disc shape; further, a hinge shaft is rotatably provided on the ring 1821, and the fan-shaped plate 1822 is fixedly provided on the hinge shaft, and a rotating motor 1823 for driving the hinge shaft to rotate and drive the fan-shaped plate 1822 to rotate is provided on the ring 1821; the fan-shaped plate 1822 When it plays a blocking role, the rotating motor 1823 is started to drive the fan-shaped plate 1822 to a position perpendicular to the first rod body 21 and spliced ​​into a disc. At this time, the arc plate 181 is located between the blocking plates 182 on both sides; when the top rod 2 is moved out, the arc plate 181 is first recovered to the first rod body 21. At this time, the water in the third water bag 20 enters the fourth water bag 23, and the volume of the third water bag 20 shrinks and drives the arc plate 181 to enter the arc groove 19. Subsequently, the fan plate 1822 is driven to rotate toward the first rod body 21 by the rotating motor 1823, so that the fan plate 1822 is close to the first rod body 21 and is easy to be removed from the grouting catheter 1.

[0035] The implementation principle of a jacking rod for tunnel conduit construction in the embodiment of the present application is as follows: Before the grouting tube 1 is driven into the rock formation, the push rod 2 is first inserted into the grouting tube 1, and then the connecting plate 5 is pushed to rotate by the push block 61. The connecting plate 5 rotates in the direction away from the push rod 2, so that the connecting plate 5 covers the end of the grouting tube 1. At this time, the end of the grouting tube 1 covers the bottom of the connecting plate 5, and the bottom diameter of the connecting plate 5 after unfolding is larger than the outer diameter of the grouting tube 1. Then the jacking plate 4 is connected to the jacking device, and the jacking device drives the push rod 2 into the rock formation. The push rod 2 guides the grouting tube 1 to open a hole, so that the grouting tube 1 can enter the rock formation without hindrance, thereby reducing the obstruction of the rock and soil layer to the grouting tube 1, and then reducing the possibility of bending and damage of the grouting tube 1, thereby improving the reinforcement effect of the rock and soil layer.

[0036] When the conical head 3 and the connecting plate 5 are drilling and forming, the rotating motor 1823 is first started. The rotating motor 1823 drives the fan-shaped plate 1822 to rotate and splice to form the blocking plate 182, and then the micro pump 24 is started. The micro pump 24 injects the water in the fourth water bag 23 into the third water bag 20. The third water bag 20 drives the arc plate 181 to move out of the arc groove 19 and abut against the inner wall of the hole. The rock debris and soil layer generated by the drilling pass through the conical head 3 and the connecting plate 5 and fall between the adjacent arc plates 181. When the first rod body 21 drives the arc plate 181 to rotate, the arc plate 181 scrapes the rock debris and soil layer on the inner wall of the hole, thereby improving the hole quality.

[0037] When the grouting tube 1 is driven into the designed position, the water in the first water bag 62 enters the second water bag 63, and drives the push block 61 to be recovered into the first rod body 21. At this time, under the action of the return spring 71, the connecting plate 5 is driven to rotate toward the first rod body 21 and approach the first rod body 21, and then by rotating the motor 1823 and the micro pump 24, the blocking plate 182 is moved close to the first rod body 21, and the arc plate 181 is recovered into the arc groove 19, and then the push rod 2 is removed from the grouting tube 1.

[0038] The embodiment of the present application discloses a jacking device for tunnel conduit construction, including a jacking jack rod and a frame 11. A hydraulic cylinder 14 and a mounting plate 15 are provided on the frame 11. The mounting plate 15 is fixedly arranged on the piston rod of the hydraulic cylinder 14. A driving motor 16 is provided on the mounting plate 15. A jacking block 12 is provided on the output shaft of the driving motor 16. The jacking block 12 is used to be plugged into a rectangular jacking groove 13 opened on the jacking plate 4.

[0039] The implementation principle of a jacking device for tunnel conduit construction in the embodiment of the present application is as follows: When the jacking rod 2 enters the rock and soil layer, the jacking block 12 is first plugged into the jacking plate 4, and then the hydraulic cylinder 14 and the drive motor 16 are started at the same time. The drive motor 16 drives the jacking block 12 to rotate, and the jacking block 12 drives the jacking rod 2 to rotate. The rotation of the jacking rod 2 drives the conical head 3 and the connecting plate 5 to rotate in the direction of the axis of the jacking rod 2 and enter the rock and soil layer; at the same time, the hydraulic cylinder 14 drives the mounting plate 15 to move, and drives the drive motor 16 and the jacking rod 2 to push, so as to drive the grouting conduit 1 into the face. When the length of the jacking rod 2 needs to be extended, the splicing rod 221 is installed in the grouting conduit 1 and plugged into the end of the previous splicing rod 221 to extend the length of the jacking rod 2.

[0040] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A jacking rod for tunnel conduit construction, characterized in that: The invention comprises a push rod (2) sleeved in a grouting conduit (1), wherein the push rod (2) is slidably inserted into the grouting conduit (1), wherein the outer diameter of the push rod (2) is equal to the inner diameter of the grouting conduit (1), wherein one end of the push rod (2) is provided with a conical head (3), and the other end is provided with a jacking plate (4), wherein the jacking plate (4) is used to connect a jacking device to lift the push rod (2) into a rock formation, and the push rod (2) enters the rock formation to drive the grouting conduit (1) into the rock formation; The bottom surface diameter of the conical head (3) is equal to the inner diameter of the grouting conduit (1); a plurality of connecting plates (5) are provided between the conical head (3) and the top rod (2); the plurality of connecting plates (5) are hinged at the bottom of the conical head (3); the hinge axis of the connecting plate (5) is perpendicular to the axis direction of the top rod (2); and the connecting plate (5) further comprises a first driving member (6) for driving the connecting plate (5) to rotate so that the connecting plate (5) obliquely covers the end of the grouting conduit (1); The mandrel (2) is provided with a reinforcing piece (18), and the reinforcing piece (18) is used to scrape the rock slag drilled by the conical head (3) and the connecting plate (5) onto the inner wall of the hole to reinforce the hole; It also comprises a recovery part (7), which is used to recover the connection plate (5) and approach the top rod (2) after the grouting conduit (1) reaches the designed position, so as to remove the top rod (2) from the grouting conduit (1).

2. A jacking rod for tunnel conduit construction according to claim 1, characterized in that: The push rod (2) comprises a first rod body (21) and a second rod body (22); the first rod body (21) is coaxially arranged on the second rod body (22); the diameter of the first rod body (21) is smaller than the diameter of the second rod body (22); the diameter of the second rod body (22) is equal to the inner diameter of the grouting conduit (1); the push plate (4) is fixedly arranged at the end of the second rod body (22); the conical head (3) is fixedly arranged at the end of the first rod body (21); the bottom diameter of the conical head (3) is equal to the diameter of the second rod body (22); the connecting plate (5) is hinged at the bottom of the conical head (3); and the length direction of the initial position is parallel to the length direction of the first rod body (21); the recovery member (7) is used to recover the connecting plate (5) close to the first rod body (21) to remove the push rod (2) from the grouting conduit (1).

3. A jacking rod for tunnel conduit construction according to claim 2, characterized in that: The first driving member (6) comprises a connecting tube (68) arranged in the first rod body (21) and a push block (61) slidably arranged in the connecting tube (68), wherein the push block (61) faces the back of the connecting plate (5). The first driving member (6) further comprises a first water bag (62) arranged in the connecting tube (68), a second water bag (63) arranged in the first rod body (21), and a connecting tube (64) for connecting the first water bag (62) and the second water bag (63). A push plate (65) is slidably arranged in the first rod body (21), wherein the second water bag (63) is located on the push plate (65). The first driving member (6) further comprises a second driving member for driving the push plate (65) to slide and compress the second water bag (63), so that the liquid in the second water bag (63) enters the first water bag (62) through the connecting tube (64), and pushes the push block (61) to slide out of the connecting tube (68) and abut against the connecting plate (5), thereby driving the connecting plate (5) to rotate.

4. A jacking rod for tunnel conduit construction according to claim 3, characterized in that: The plurality of connecting plates (5) are evenly arranged along the annular direction of the conical head (3); the connecting pipe (68) is a multi-port pipe and the number of ports is equal to the number of connecting plates (5); the push block (61) is slidably arranged in the port of the connecting pipe (68); the first water bag (62) is located in the middle of the connecting pipe (68) and is in an emitting shape; the emitting end (17) of the first water bag (62) is located in the port of the connecting pipe (68); the second water bag (63) is located between the connecting pipe (64) and the push plate (65); the second driving member is used to drive the push plate (65) to move and compress the second water bag (63), so that the first water bag (62) expands along the emitting end (17) and pushes the push block (61) to slide and drive the connecting plate (5) to rotate.

5. A jacking rod for tunnel conduit construction according to claim 4, characterized in that: The second driving member comprises a micro motor (66) arranged in the first rod body (21), a screw rod (67) is arranged on the output shaft of the micro motor (66), the length direction of the screw rod (67) is parallel to the axial direction of the first rod body (21), and the push plate (65) is threadedly connected to the screw rod (67).

6. A jacking rod for tunnel conduit construction according to claim 3, characterized in that: The first water bag (62) is located above the second water bag (63), and the recovery member (7) comprises a return spring (71) arranged between the connecting plate (5) and the first rod body (21), one end of the return spring (71) is fixedly arranged on the back of the connecting plate (5), and the other end is fixedly arranged on the first rod body (21), and the return spring (71) is used to drive the connecting plate (5) to have a tendency to rotate toward the first rod body (21).

7. The jacking rod for tunnel conduit construction according to claim 1, characterized in that: The conical head (3) and the connecting plate (5) are provided with thread segments (8), and the thread segments (8) on adjacent connecting plates (5) are spaced apart and connected along the rotation direction of the thread segments (8).

8. A jacking rod for tunnel conduit construction according to claim 7, characterized in that: The connecting plates (5) are provided with cutting blades (9) facing the side walls of the adjacent connecting plates (5), and the cutting blades (9) are used to cut the rock layer between the adjacent connecting plates (5); an elastic receiving cloth (10) is provided between the adjacent connecting plates (5), and the two sides of the elastic receiving cloth (10) are respectively fixedly arranged on the side walls of the connecting plates (5), and the cutting blades (9) are located above the elastic receiving cloth (10).

9. A jacking rod for tunnel conduit construction according to claim 2, characterized in that: The second rod body (22) comprises a plurality of splicing rods (221), the outer diameter of the splicing rods (221) being equal to the inner diameter of the grouting conduit (1), the splicing rods (221) being coaxially spliced, the first rod body (21) being coaxially fixedly arranged at the end of the splicing rod (221) at the head end, the jacking plate (4) being fixedly arranged at the end of the splicing rod (221) at the tail end, a rectangular plug-in block (222) being fixedly arranged at one end of the splicing rod (221), and a rectangular plug-in groove (223) for plugging the plug-in block (222) into the other end being provided.

10. A jacking device for tunnel conduit construction, comprising a jacking rod according to any one of claims 1 to 9, characterized in that: The invention also comprises a frame (11), wherein a hydraulic cylinder (14) and a mounting plate (15) are arranged on the frame (11), wherein the mounting plate (15) is fixedly arranged on the piston rod of the hydraulic cylinder (14), wherein a driving motor (16) is arranged on the mounting plate (15), wherein an jacking block (12) is arranged on the output shaft of the driving motor (16), and wherein the jacking block (12) is used for being plugged into a rectangular jacking groove (13) provided on the jacking plate (4).

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