A jacking method for the head of a pipe jacking construction to enter the hole

Abstract

The present invention belongs to the field of trenchless construction technology, and specifically relates to a jacking method for a pipe jacking construction machine head to enter a hole. A back wall is made by using a combination of back irons and concrete, with a wall thickness of one meter. The two sides of the back irons are welded and fixed firmly to the embedded iron in the well wall; a reserved hole is made, a water stop rubber ring for the hole is installed, and the water leakage points around the hole are blocked. Dewatering wells are drilled in advance around the well and pumped with water pumps to lower the water level near the hole to prevent excessive external water pressure during the jacking of the machine head; guide rails are installed and the pipe jacking machine housing is hoisted and lowered into the well. Brackets and stress wing plates are welded on both sides of the pipe jacking machine housing, and two jacks are installed. The jacks are installed on the brackets and fixed on the outer side of the pipe jacking machine housing; the problem of insufficient structural space in the pipe jacking well is effectively solved through the reverse jacking method of entering the hole. This method is slightly adjusted based on the layout form of the construction equipment of the normal pipe jacking method, and the method is simple and easy to implement. Without changing the well structure, the construction speed can be increased and the project cost can be reduced.

Description

Technical Field

[0001] The present invention belongs to the technical field of trenchless construction, and specifically relates to a method for pushing a pipe jacking construction machine head into a hole. Background Art

[0002] The pipe jacking construction process is a trenchless construction method. Its construction feature is that there is no need to excavate the soil during the construction process. The pipe jacking machine is used to cut the rock and soil to form a horizontal hole, thereby realizing the laying of the pipeline. During the construction process, the jacking force generated by the pipe jacking machine is used to overcome the friction between the pipeline and the surrounding soil, so as to jack the pipeline into the soil layer according to the designed slope and transport the soil away to achieve the effect of laying the pipeline.

[0003] A Chinese patent with the publication number CN109763828A discloses a pipe jacking machine tunneling construction method. The pipe jacking machine tunneling construction method includes: predicting and calculating the tunneling parameters of the pipe jacking machine according to the burial depth, geological conditions and environmental conditions of the pipe jacking machine; detecting and monitoring the ground settlement and deformation conditions during the operation of the pipe jacking machine, and verifying the predicted tunneling parameters according to the monitoring results; the tunneling parameters include the soil pressure value, and the theoretical calculation formula of the soil pressure value is as follows: P0 = K × γ × H; where P0 is the theoretical calculated value of the soil pressure on the front of the pipe jacking machine, K is the lateral pressure coefficient of the soil, γ is the unit weight of the soil, and H is the influence depth of the pipe jacking; the actually adopted soil pressure value is P, and the preliminary pressure is P1. The calculation formula of the actual soil pressure value is as follows: P = P0 + P1. Through the technical solution provided by the present invention, the problem of poor tunneling construction effect of the existing pipe jacking machine in the prior art can be solved.

[0004] During the trenchless construction process, there is sometimes a problem that the size of the structural well is insufficient and the pipe jacking machine cannot normally push into the hole. At present, there is no construction method for this working condition in the existing technical solutions. Most of the current solutions to this problem are to change the well structure, and this solution extremely delays the construction speed and is prone to cause construction period delays; for this reason, the present invention provides a method for pushing a pipe jacking construction machine head into a hole. Summary of the Invention

[0005] In order to make up for the deficiencies of the existing technology and solve at least one technical problem proposed in the background art.

[0006] The technical solution adopted by the present invention to solve its technical problems is as follows: A method for pushing a pipe jacking construction machine head into a hole according to the present invention includes the following steps:

[0007] S1. Use the form of a back iron combined with concrete to make a back wall, the wall thickness is one meter, and both sides of the back iron are welded and fixed firmly with the embedded iron on the well wall;

[0008] S2. Make reserved holes, install water-stop rubber rings for the tunnel portal and seal the water leakage points around the holes. Drill dewatering wells in advance around the well and use water pumps to drain water to lower the water level near the holes to prevent excessive external water pressure during the jacking of the machine head.

[0009] S3. Install guide rails and hoist the shell of the pipe jacking machine into the well. Weld brackets and stress wing plates on both sides of the shell of the pipe jacking machine and install two jacks. The jacks are installed on the brackets and fixed on the outside of the shell of the pipe jacking machine to prevent it from tipping over during jacking.

[0010] S4. Start the pipe jacking. The operator controls the oil pump on the operation console, and the jacks extend and push against the back wall. After the back wall is stressed, it reacts on the wing plates on both sides of the shell of the pipe jacking machine, and the whole shell of the pipe jacking machine is stressed and advances forward to the hole.

[0011] S5. When the shell of the pipe jacking machine enters the hole, start the cutter head to rotate and grind open the hole. Control the two side jacks to continuously jack in until the front part of the shell of the pipe jacking machine enters the hole. Remove the jacks, brackets and wing plates, and install the jacks on the jacking frame in front of the back. Then the normal method can be used for propulsion. During operation, the problem of insufficient structural space of the pipe jacking well is effectively solved by the way of jacking into the hole by reverse jacking. This method is slightly adjusted based on the layout form of the construction equipment of the normal pipe jacking method. The method is simple and easy to implement, and can improve the construction speed and reduce the project cost without changing the well structure.

[0012] Preferably, a cutter head is rotatably connected to the advancing end of the shell of the pipe jacking machine. A rotating shaft is fixed inside the cutter head. A driving component is installed at one end of the rotating shaft away from the cutter head. The driving component is used to drive the rotating shaft to rotate. A partition plate is arranged between the cutter head and the driving component. The cutter head is rotatably connected to the partition plate. The driving component is fixed to the shell of the pipe jacking machine. A plurality of stirring shafts are fixed outside the rotating shaft and between the cutter head and the partition plate. One side of the stirring shaft close to the driving component is attached to the partition plate. A recovery hole is opened at the bottom end of the partition plate. A recovery pipe is fixed on one side of the partition plate close to the driving component. A screw conveyor is installed inside the recovery pipe. During operation, the driving component drives the rotating shaft to rotate, and the rotating shaft rotates to drive the cutter head to rotate. After the cutter head rotates, it cuts the soil, so that the shell of the pipe jacking machine can advance smoothly, which is convenient for the laying of pipelines. During the rotation of the cutter head, it will drive the stirring shafts to rotate at the same time. During the rotation of the stirring shafts, they will further stir the chopped soil to make it crushed. The crushed soil falls into the recovery hole, and then it is transported and discharged by the screw conveyor inside the recovery pipe. By setting the stirring shafts to further break the soil, it can effectively prevent the situation that the pipe jacking machine cannot advance due to soil blockage during the advancement of the pipe jacking machine.

[0013] Preferably, a puncture head is slidably connected inside the rotating shaft. One side of the puncture head close to the partition board is fixed with a telescopic rod. The outside of the telescopic rod is slidably connected with a limit frame. One end of the telescopic rod close to the partition board is fixed with an insertion contact point. The end of the insertion contact point away from the telescopic rod is provided with a stop contact point. The stop contact point is fixedly connected with the limit frame. The insertion contact point and the stop contact point are signal-connected to the controller of the pipe jacking machine housing through a circuit. During operation, when the pipe jacking machine is advancing, once a large hard stone appears in the soil, at this time, the rotating shaft will push the puncture head to move until the puncture head contacts the stone. After the puncture head contacts the stone, the stone will exert a squeezing force on it, thereby pushing the puncture head to slide inside the rotating shaft. The sliding of the puncture head will push the telescopic rod to move, and the movement of the telescopic rod will drive the insertion contact point to move until the insertion contact point contacts the stop contact point. When the telescopic rod contacts the stop contact point, the hydraulic device of the pipe jacking machine will receive a signal and stop advancing, preventing the pipe jacking machine from deviating from its advancing direction due to the obstruction of the stone and also preventing the pipe jacking machine from being damaged.

[0014] Preferably, a follow-up magnet is fixed inside the puncture head, and a through electromagnet is installed inside the partition board. During operation, after the pipe jacking machine stops, the external staff starts the power supply of the through electromagnet to make it generate magnetism and exert an attractive force on the follow-up magnet, further causing the telescopic rod to contract. Then, the power supply of the through electromagnet is disconnected, and so on, which can drive the puncture head to break the external stone, thus achieving the effect of automatically breaking the stone.

[0015] Preferably, a plurality of shaking springs are fixed between the puncture head and the partition board and outside the telescopic rod. During operation, when the puncture head is subjected to magnetic force, it will repeatedly compress the shaking springs. During the reset process of the shaking springs, it will drive the puncture head to bounce, thereby further improving the crushing effect of the puncture head on the stone.

[0016] Preferably, an elastic membrane is installed inside the rotating shaft and outside the puncture head. One end of the elastic membrane close to the rotating shaft is fixed with a power-on column, and a current-carrying fluid is placed inside the elastic membrane. During operation, during the installation of the puncture head, current is introduced into the current-carrying fluid through the power-on column, thereby changing the property of the current-carrying fluid to make it in a solidified state. In this way, the current-carrying fluid will exert a resistance on the puncture head, preventing the puncture head from giving a false alarm during normal pipe jacking operations. When encountering a stone, the current-carrying fluid will drive the elastic membrane to twist under a large force. When the puncture head breaks the stone, the staff should turn off the power supply of the power-on column to make the current-carrying fluid return to the fluid state.

[0017] Preferably, a plurality of counterweight blocks are slidably connected to both sides of the cutter head, and a plurality of cutting blades are fixed to the side of the counterweight block away from the cutter head; during operation, during the rotation of the cutter head, the counterweight blocks outside it will drive the cutting blades to slide reciprocally under the action of centrifugal force. While the cutting blades further cut the soil during the sliding process, it also prevents the soil containing silk threads from winding around the cutter head, resulting in damage to the cutter head.

[0018] Preferably, a plurality of crushing blades are fixed inside the stirring shaft, and an anti-corrosion coating is plated on the surfaces of the plurality of crushing blades; during operation, during the rotation of the stirring shaft, the crushing blades inside it will also rotate accordingly. The rotation of the crushing blades will further crush the stones broken by the piercing head, preventing the stones from being too large to cause blockage and improving the stability of the equipment operation.

[0019] Preferably, an elastic sheet is fixed inside the stirring shaft and outside the crushing blades, and a knocking ball is fixed to the end of the elastic sheet close to the crushing blades; during operation, during the rotation of the stirring shaft, the knocking ball inside it will pull the elastic sheet to bounce reciprocally under the action of inertia force, thereby knocking on the crushing blades. After being knocked, the crushing blades will generate vibrations, and the vibrations will improve the cutting effect of the crushing blades on the stones to a certain extent, further preventing the situation of stone blockage of the equipment.

[0020] Preferably, an extrusion block is fixed to the outside of the stirring shaft, an oil storage bladder is installed inside the casing of the pipe jacking machine outside the extrusion block, and a drain pipe is connected through the end of the oil storage bladder away from the stirring shaft; during operation, during the rotation of the stirring shaft, it will drive the extrusion block to rotate. When the extrusion block rotates to contact the oil storage bladder, the extrusion block will squeeze the oil storage bladder, so that the lubricating fluid stored inside the oil storage bladder is sprayed out through the drain pipe. The sprayed lubricating fluid drops on the soil outside the casing of the pipe jacking machine, so that the frictional force received by the subsequent pipeline during the laying process will be reduced, thus achieving the effect of facilitating the pipeline laying.

[0021] The beneficial effects of the present invention are as follows:

[0022] 1. For a pipe jacking construction machine head jacking method into the hole described in the present invention, the problem of insufficient structural space of the pipe jacking well is effectively solved through the jacking-in method. This method is slightly adjusted based on the layout form of the normal pipe jacking method construction equipment. The method is simple and easy to implement, and can achieve the effects of improving the construction speed and reducing the project cost without changing the well structure.

[0023] 2. The pipe jacking construction head jacking method of the present invention is such that when encountering a stone, it will push the piercing head to slide, thereby driving the insertion contact point to move until the insertion contact point contacts the stop contact point. When the telescopic rod contacts the stop contact point, the hydraulic device of the pipe jacking machine will receive a signal and stop advancing, preventing the pipe jacking machine from deviating in its advancing direction due to the obstruction of the stone and also preventing the pipe jacking machine from being damaged. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The present invention will be further described below with reference to the accompanying drawings.

[0025] Figure 1 is the method flow chart of the present invention;

[0026] Figure 2 is the three-dimensional view of the present invention;

[0027] Figure 3 is the cross-sectional view of the pipe jacking machine housing structure in the present invention;

[0028] Figure 4 is the structural schematic diagram of the second embodiment of the pipe jacking machine housing structure in the present invention;

[0029] Figure 5 is the present invention Figure 4 partial enlarged view at A in;

[0030] Figure 6 is the present invention Figure 5 partial enlarged view at B in;

[0031] Figure 7 is the present invention Figure 4 partial enlarged view at C in.

[0032] In the figure: 1. Pipe jacking machine housing; 2. Cutter head; 3. Driving assembly; 4. Stirring shaft; 5. Recovery pipe; 6. Auger; 7. Piercing head; 8. Telescopic rod; 9. Insertion contact point; 10. Stop contact point; 11. Pass-through electromagnet; 12. Follow-up magnet; 13. Elastic membrane; 14. Electrorheological fluid; 15. Energized column; 16. Counterweight; 17. Cutting blade; 18. Crushing blade; 19. Knocking ball; 20. Elastic sheet; 21. Extrusion block; 22. Oil storage bladder; 23. Drain pipe; 24. Oscillation spring. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0033] In order to make the technical means, creative features, achieved purposes and effects of the present invention easy to understand, the present invention will be further described below in conjunction with specific embodiments.

[0034] Embodiment 1

[0035] As Figure 1As shown in the figure, a method for jacking a pipe jacking construction machine head into a hole according to an embodiment of the present invention includes the following steps:

[0036] S1. Use the form of a back iron combined with concrete to make a back wall with a wall thickness of one meter, and weld and fix the two sides of the back iron to the embedded iron in the well wall firmly;

[0037] S2. Make a reserved hole, install a water-stop hole door rubber ring and plug the water leakage points around the hole, and set up dewatering wells in advance around the well and use a water pump to drain to reduce the water level near the hole to prevent excessive external water pressure when the machine head jacks in;

[0038] S3. Install the guide rail and hoist the pipe jacking machine housing 1 into the well. Weld brackets and stress wing plates on both sides of the pipe jacking machine housing 1 and install two jacks. The jacks are installed on the brackets and fixed on the outside of the pipe jacking machine housing 1 to prevent it from tipping over during jacking;

[0039] S4. Start pipe jacking. The operator controls the oil pump of the operation console, and the jacks extend and push against the back wall. After the back wall is stressed, it reacts against the wing plates on both sides of the pipe jacking machine housing 1, and the whole pipe jacking machine housing 1 is stressed and pushed forward into the hole;

[0040] S5. When the pipe jacking machine housing 1 enters the hole, start the cutter head 2 to rotate and grind open the hole, control the two side jacks to continue jacking until the front part of the pipe jacking machine housing 1 enters the hole, remove the jacks, brackets and wing plates, and install the jacks on the jacking frame in front of the back. Then the normal method can be used for propulsion; during work, the problem of insufficient structural space of the pipe jacking well is effectively solved by the reverse jacking method of entering the hole. This method is slightly adjusted based on the layout form of the construction equipment of the normal pipe jacking method. The method is simple and easy to implement, and can improve the construction speed and reduce the project cost without changing the well structure.

[0041] Such as Figures 2 to 3As shown in the figure, a cutter head 2 is rotatably connected to the advancing end of the pipe jacking machine housing 1. A rotating shaft is fixed inside the cutter head 2. One end of the rotating shaft away from the cutter head 2 is provided with a driving assembly 3. The driving assembly 3 is used to drive the rotating shaft to rotate. A partition plate is arranged between the cutter head 2 and the driving assembly 3. The cutter head 2 is rotatably connected to the partition plate. The driving assembly 3 is fixedly connected to the pipe jacking machine housing 1. A plurality of stirring shafts 4 are fixed outside the rotating shaft and between the cutter head 2 and the partition plate. One side of the stirring shaft 4 close to the driving assembly 3 is in contact with the partition plate. A recovery hole is opened at the bottom end of the partition plate. A recovery pipe 5 is fixed on one side of the partition plate close to the driving assembly 3. An auger 6 is installed inside the recovery pipe 5. During operation, the driving assembly 3 drives the rotating shaft to rotate. The rotation of the rotating shaft drives the cutter head 2 to rotate. After the cutter head 2 rotates, it cuts the soil, enabling the pipe jacking machine housing 1 to advance smoothly, thus facilitating the laying of pipes. During the rotation of the cutter head 2, it will simultaneously drive the stirring shafts 4 to rotate. During the rotation of the stirring shafts 4, they will further agitate the shredded soil to make it pulverized. The pulverized soil falls into the recovery hole, and then is transported and discharged by the auger 6 inside the recovery pipe 5. By arranging the stirring shafts 4 to further break the soil, it can effectively prevent the situation that the pipe jacking machine cannot advance due to soil blockage during the advancement of the pipe jacking machine.

[0042] Embodiment 2

[0043] As Figures 4 to 5 shown, compared with Embodiment 1, another implementation manner of the present invention is as follows: A piercing head 7 is slidably connected inside the rotating shaft. One side of the piercing head 7 close to the partition plate is fixed with a telescopic rod 8. A limiting frame is slidably connected to the outside of the telescopic rod 8. One end of the telescopic rod 8 close to the partition plate is fixed with an insertion contact point 9. One end of the insertion contact point 9 away from the telescopic rod 8 is provided with a stop contact point 10. The stop contact point 10 is fixedly connected to the limiting frame. The insertion contact point 9 and the stop contact point 10 are signal-connected to the controller of the pipe jacking machine housing 1 through a circuit. During operation, during the advancement of the pipe jacking machine, once there are relatively large hard stones in the soil, at this time the rotating shaft will push the piercing head 7 to move until the piercing head 7 contacts the stone. After the piercing head 7 contacts the stone, the stone will exert a squeezing force on it, thus pushing the piercing head 7 to slide inside the rotating shaft. The sliding of the piercing head 7 drives the telescopic rod 8 to move, and the movement of the telescopic rod 8 drives the insertion contact point 9 to move until the insertion contact point 9 contacts the stop contact point 10. When the telescopic rod 8 contacts the stop contact point 10, the hydraulic device of the pipe jacking machine will receive a signal and stop advancing, preventing the pipe jacking machine from deviating from its advancing direction due to the obstruction of the stone and also preventing the pipe jacking machine from being damaged.

[0044] As Figure 5As shown, a follower magnet 12 is fixedly installed inside the piercing head 7, and an electromagnet 11 is installed inside the partition plate. During operation, after the pipe jacking machine stops, the external staff activates the power supply of the electromagnet 11, making it energized to generate magnetism and exert an attractive force on the follower magnet 12, further causing the telescopic rod 8 to contract. Then, the power supply of the electromagnet 11 is disconnected. By repeating this process, the piercing head 7 can be driven to break the external stones, thus achieving the effect of automatically breaking stones.

[0045] As Figure 5 shown, a plurality of shaking springs 24 are fixedly installed between the piercing head 7 and the partition plate and outside the telescopic rod 8. During operation, when the piercing head 7 is subjected to magnetic force, it will repeatedly compress the shaking springs 24. During the reset process of the shaking springs 24, the piercing head 7 will be driven to bounce, further improving the crushing effect of the piercing head 7 on the stones.

[0046] As Figures 5 to 6 shown, an elastic membrane 13 is installed inside the rotating shaft and outside the piercing head 7. One end of the elastic membrane 13 close to the rotating shaft is fixedly installed with an energizing column 15, and a current - rheological fluid 14 is placed inside the elastic membrane 13. During operation, during the installation of the piercing head 7, current is introduced into the current - rheological fluid 14 through the energizing column 15, thereby changing the property of the current - rheological fluid 14 to make it in a solidified state. In this way, the current - rheological fluid 14 will exert resistance on the piercing head 7, preventing false alarms from occurring during normal pipe jacking operations. When encountering stones, the current - rheological fluid 14 will drive the elastic membrane 13 to twist under a large force. When the piercing head 7 breaks the stones, the staff should turn off the power supply of the energizing column 15 to make the current - rheological fluid 14 return to its fluid state.

[0047] As Figure 7 shown, a plurality of counterweight blocks 16 are slidably connected to both sides of the cutter head 2, and a plurality of cutting blades 17 are fixedly installed on the side of the counterweight block 16 away from the cutter head 2. During operation, during the rotation of the cutter head 2, the external counterweight blocks 16 will drive the cutting blades 17 to slide back and forth under the action of centrifugal force. While the cutting blades 17 are sliding, they will further cut the soil and also prevent the soil from containing filaments that may entangle the cutter head 2 and cause damage to the cutter head 2.

[0048] As Figure 7 shown, a plurality of crushing blades 18 are fixedly installed inside the stirring shaft 4, and an anti - corrosion coating is plated on the surfaces of the plurality of crushing blades 18. During operation, during the rotation of the stirring shaft 4, the internal crushing blades 18 will also rotate accordingly. The rotation of the crushing blades 18 will further crush the stones broken by the piercing head 7, preventing the stones from being too large to cause blockage and improving the stability of the equipment operation.

[0049] As Figure 7 shown, an elastic sheet 20 is fixed inside the stirring shaft 4 and outside the crushing blade 18, and a knocking ball 19 is fixed at one end of the elastic sheet 20 close to the crushing blade 18; during operation, when the stirring shaft 4 rotates, the knocking ball 19 inside it will pull the elastic sheet 20 to bounce back and forth under the action of inertia force, thereby knocking the crushing blade 18. After being knocked, the crushing blade 18 will vibrate, and the vibration will improve the cutting effect of the crushing blade 18 on the stones to a certain extent, further preventing the situation of stone blockage of the equipment.

[0050] As Figure 7 shown, an extrusion block 21 is fixed outside the stirring shaft 4, and an oil storage bladder 22 is installed inside the shell 1 of the pipe jacking machine outside the extrusion block 21. One end of the oil storage bladder 22 away from the stirring shaft 4 is connected through a drain pipe 23; during operation, when the stirring shaft 4 rotates, it will drive the extrusion block 21 to rotate. When the extrusion block 21 rotates to contact the oil storage bladder 22, the extrusion block 21 will squeeze the oil storage bladder 22, so that the lubricating fluid stored inside the oil storage bladder 22 is sprayed out through the drain pipe 23. The sprayed lubricating fluid drops on the soil outside the shell 1 of the pipe jacking machine, so that the friction force received by the subsequent pipeline during laying will be reduced, thus achieving the effect of facilitating pipeline laying.

[0051] Working principle: During use, the drive assembly 3 drives the rotating shaft to rotate, and the rotating shaft rotates to drive the cutter head 2 to rotate. After the cutter head 2 rotates, it will cut the soil, so that the shell 1 of the pipe jacking machine can move forward smoothly, thereby facilitating the laying of the pipeline. During the rotation of the cutter head 2, it will simultaneously drive the stirring shaft 4 to rotate. During the rotation of the stirring shaft 4, it will further agitate the shredded soil to make it crushed. The crushed soil falls into the recovery hole, and then is transported away by the auger 6 inside the recovery pipe 5. By setting the stirring shaft 4 to further crush the soil, it can effectively prevent the situation that the pipe jacking machine cannot move forward due to soil blockage during the forward movement of the pipe jacking machine;

[0052] During the advancement of the pipe jacking machine, once a large hard rock appears in the soil, the rotating shaft will push the piercing head 7 to move until the piercing head 7 contacts the rock. After the piercing head 7 contacts the rock, the rock will exert a squeezing force on it, thus pushing the piercing head 7 to slide inside the rotating shaft. The sliding of the piercing head 7 will push the telescopic rod 8 to move, and the movement of the telescopic rod 8 will drive the plug contact point 9 to move until the plug contact point 9 contacts the stop contact point 10. When the telescopic rod 8 contacts the stop contact point 10, the hydraulic device of the pipe jacking machine will receive a signal and stop advancing, preventing the pipe jacking machine from deviating from its advancing direction due to the obstruction of the rock and also preventing the pipe jacking machine from being damaged. After the pipe jacking machine stops, external workers start the power supply of the electromagnet 11, making it generate magnetism and exert an attractive force on the follower magnet 12, further causing the telescopic rod 8 to contract. Then, the power supply of the electromagnet 11 is disconnected, and so on, which can drive the piercing head 7 to break the external rock, thus achieving the effect of automatically breaking the rock. When the piercing head 7 is under magnetic force, it will repeatedly compress the shaking spring 24. During the reset process of the shaking spring 24, it will drive the piercing head 7 to bounce, thus further improving the crushing effect of the piercing head 7 on the rock.

[0053] During the installation of the piercing head 7, an electric current is introduced into the electrorheological fluid 14 through the energizing column 15, thereby changing the property of the electrorheological fluid 14 to make it in a solidified state. In this way, the electrorheological fluid 14 will exert a resistance on the piercing head 7, preventing the piercing head 7 from giving false alarms during normal pipe jacking operations. When encountering a rock, the electrorheological fluid 14 will drive the elastic membrane 13 to twist under a large force. When the piercing head 7 breaks the rock, the worker should turn off the power supply of the energizing column 15 to make the electrorheological fluid 14 return to its fluid state.

[0054] During the rotation of the cutter head 2, the external counterweight 16 will drive the cutting blade 17 to slide back and forth under the action of centrifugal force. During the sliding process of the cutting blade 17, it will further cut the soil and also prevent the soil from containing silk threads from winding around the cutter head 2, resulting in damage to the cutter head 2.

[0055] During the rotation of the stirring shaft 4, the crushing blade 18 inside it will also rotate accordingly. The rotation of the crushing blade 18 will further crush the rock broken by the piercing head 7, preventing the rock from being too large to cause blockage and improving the stability of the equipment operation. During the rotation of the stirring shaft 4, the knocking ball 19 inside it will pull the elastic sheet 20 to bounce back and forth under the action of inertia force, thereby knocking on the crushing blade 18. After being knocked, the crushing blade 18 will vibrate, and the vibration will improve the cutting effect of the crushing blade 18 on the rock to a certain extent, further preventing the situation of the rock blocking the equipment.

[0056] During the rotation of the stirring shaft 4, it drives the extrusion block 21 to rotate. When the extrusion block 21 rotates and contacts the oil storage bladder 22, the extrusion block 21 will extrude the oil storage bladder 22, so that the lubricating fluid stored inside the oil storage bladder 22 is ejected through the drain pipe 23. The ejected lubricating fluid drops onto the soil outside the shield machine housing 1, so that the frictional force suffered by the subsequent pipeline during laying is reduced, thus achieving the effect of facilitating pipeline laying.

[0057] The above front, back, left, right, up, and down are all based on the Figure 2 description in the accompanying drawings of the specification. Taking the perspective of the observer as the standard, the side of the device facing the observer is defined as the front, and the left side of the observer is defined as the left, and so on.

[0058] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the protection scope of the present invention.

[0059] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art of this industry should understand that the present invention is not limited by the above embodiments. The above embodiments and the descriptions in the specification only illustrate the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. A method for jacking the head of a pipe jacking construction into the hole, characterized in that: The steps include the following: S1. Use the back iron combined with concrete form to make the back wall with a wall thickness of one meter, and weld and fix the two sides of the back iron firmly to the embedded iron of the well wall; S2. Make a reserved hole, install a water-stop rubber ring for the hole and seal the water leakage points around the hole. Advance water injection wells are drilled in advance around the well and water pumps are used for drainage to lower the water level near the hole to prevent excessive external water pressure during the jacking of the machine head; S3. Install the guide rails and hoist the shell of the pipe jacking machine into the well. Weld brackets and stress wing plates on both sides of the shell of the pipe jacking machine and install two jacks. The jacks are installed on the brackets and fixed on the outside of the shell of the pipe jacking machine to prevent it from tipping over during jacking; S4. Start the pipe jacking. The operator controls the oil pump of the operation console, and the jacks extend and push against the back wall. After the back wall is stressed, it reacts on the wing plates on both sides of the shell of the pipe jacking machine, and the whole shell of the pipe jacking machine is stressed and advances forward to the hole; S5. When the shell of the pipe jacking machine enters the hole, start the cutter head to rotate and grind the hole. Control the two side jacks to continuously jack until the front part of the shell of the pipe jacking machine enters the hole. Remove the jacks, brackets and wing plates, and install the jacks on the jacking frame in front of the back to adopt the normal method for propulsion; A cutter head is rotatably connected to the advancing end of the shell of the pipe jacking machine. A rotating shaft is fixed inside the cutter head. A driving assembly is installed at one end of the rotating shaft away from the cutter head. The driving assembly is used to drive the rotating shaft to rotate. A partition plate is arranged between the cutter head and the driving assembly. The cutter head is rotatably connected to the partition plate. The driving assembly is fixedly connected to the shell of the pipe jacking machine. A plurality of stirring shafts are fixed outside the rotating shaft and between the cutter head and the partition plate. One side of the stirring shaft close to the driving assembly is attached to the partition plate. A recovery hole is opened at the bottom end of the partition plate. A recovery pipe is fixed on one side of the partition plate close to the driving assembly. A auger is installed inside the recovery pipe; A plurality of counterweight blocks are slidably connected to both sides of the cutter head. A plurality of cutting blades are fixed on one side of the counterweight block away from the cutter head.

2. A jacking method for a pipe jacking construction machine head to enter a hole, according to claim 1, characterized in that: A puncture head is slidably connected inside the rotating shaft. A telescopic rod is fixed on one side of the puncture head close to the partition plate. A limiting frame is slidably connected to the outside of the telescopic rod. An insertion contact point is fixed at one end of the telescopic rod close to the partition plate. A stop contact point is arranged at one end of the insertion contact point away from the telescopic rod. The stop contact point is fixedly connected to the limiting frame. The insertion contact point and the stop contact point are signal-connected to the controller of the shell of the pipe jacking machine through a circuit.

3. A jacking method for a pipe jacking construction machine head to enter a tunnel according to claim 2, characterized in that: A follow-up magnet is fixed inside the puncture head. A through electromagnet is installed inside the partition plate.

4. A jacking method for a pipe jacking construction machine head to enter a tunnel according to claim 2, characterized in that: A plurality of shaking springs are fixed between the puncture head and the partition plate and outside the telescopic rod.

5. A jacking method for a pipe jacking construction machine head to enter a hole, according to claim 1, characterized in that: An elastic membrane is installed inside the rotating shaft and outside the puncture head. An energizing column is fixed at one end of the elastic membrane close to the rotating shaft. A current-variable fluid is placed inside the elastic membrane.

6. A pipe jacking construction head entry jacking method according to claim 1, characterized in that: A plurality of crushing blades are fixed inside the stirring shaft. An anticorrosive coating is plated on the surfaces of the plurality of crushing blades.

7. A pipe jacking construction machine head entry jacking method according to claim 6, characterized in that: An elastic sheet is fixed inside the stirring shaft and outside the crushing blades. A knocking ball is fixed at one end of the elastic sheet close to the crushing blade.

8. A jacking method for a pipe jacking construction machine head to enter a tunnel, as described in claim 1, characterized in that: An extrusion block is fixed outside the stirring shaft, and an oil storage bag is installed inside the casing of the pipe jacking machine outside the extrusion block. One end of the oil storage bag far from the stirring shaft is connected with an oil discharge pipe in a penetrating manner.

Images