A one-time hole-forming PVC micro-jacking pipe device and a jacking pipe process thereof

Abstract

The application discloses a one-time hole-forming PVC micro jacking pipe device and a jacking pipe process thereof, which comprises a soil layer, receiving steel wells and originating steel wells are vertically arranged on two sides of the soil layer, respectively, a sedimentation tank, a high-pressure pump and a hydraulic unit are arranged on the top of the soil layer, respectively. An operating table, a push-pull pipe machine and a rear seat for supporting the push-pull pipe machine are arranged in the originating steel well, respectively, and the hydraulic unit is communicated with the push-pull pipe machine through a hydraulic pipeline. The application relates to the field of municipal pipeline trenchless construction technology, and the one-time hole-forming PVC micro jacking pipe device and the jacking pipe process thereof apply the micro jacking pipe technology to the laying of plastic pipe, are more mature in technology, and compared with traditional plastic pipe laying methods such as directional drilling, the step of multiple reaming is omitted, and the one-time hole-forming advantage is achieved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of municipal pipeline trenchless construction technology, in particular to a one-time hole forming PVC micro-jacking device and a jacking process thereof. BACKGROUND

[0002] Micro-jacking is a trenchless technology suitable for small-diameter underground municipal pipeline laying, which has the advantages of small noise and vibration, no disturbance to ground transportation, and less danger to adjacent pipelines and buildings compared to the open-cut method commonly used in traditional municipal pipeline engineering.

[0003] Traditional jacking is usually used for laying concrete, steel or cast iron pipes. The micro-jacking construction method requires the use of a jacking device to sequentially jack the guide drill rod, mud discharge pipe and mud discharge transmission screw into the receiving well, and then the jacking head is jacked into the soil along with the mud discharge pipe at the end. The cutter head rotates to drive the mud discharge transmission screw to rotate, and finally multiple prefabricated pipe sections are jacked into the soil along with the jacking head. This process is a two-step method and is relatively complicated.

[0004] Therefore, the traditional jacking technology has at least the following disadvantages: first, the pipe trench is a two-step method and is complicated to operate; second, it is only used for laying concrete, steel or cast iron pipes, and plastic pipes cannot be laid using this technology. The reason for this is that plastic pipes have weak material strength and are easily damaged during jacking due to the jacking pressure, thus reducing the application range of the jacking technology. SUMMARY

[0005] (I) Technical problems solved

[0006] In view of the deficiencies of the prior art, the present application provides a one-time hole forming PVC micro-jacking device and a jacking process thereof, which solves the problems of complicated operation and small application range of the existing micro-jacking device.

[0007] (II) Technical solutions

[0008] To achieve the above-mentioned purpose, the present application provides the following technical solutions: a one-time hole forming PVC micro-jacking device and a jacking process thereof, comprising a soil layer, the two sides of the soil layer are respectively vertically provided with a receiving steel well and a starting steel well downward, and the top of the soil layer is respectively provided with a sedimentation tank, a high-pressure pump and a hydraulic unit.

[0009] The starting steel well is provided with an operating table, a push-pull pipe machine and a rear seat for supporting the push-pull pipe machine, and the hydraulic unit is in communication with the push-pull pipe machine through a hydraulic pipeline.

[0010] The rotating end of the push-pull pipe machine is rotatably connected with a transmission screw, the transmission screw is covered with a jacking cylinder outside, the jacking cylinder is covered with a PVC pipe outside, and one end of the PVC pipe abuts against the end face of the push-pull pipe machine.

[0011] The PVC micro-jacking mechanism is fixed with the PVC pipe through a cylindrical connecting joint.

[0012] As a further preferred, the PVC micro-jacking mechanism comprises a PVC micro-jacking body and a micro-jacking head, the micro-jacking head is coaxially fixed with the force transmission screw, and a cutter head is arranged at the axis of the micro-jacking head.

[0013] As a further preferred, the high-pressure pump machine is provided with at least two groups, one of which is in communication with the sedimentation tank, and the group of high-pressure pump machines can pump out the mud inside the jacking cylinder, and the other group of high-pressure pump machines is used to inject water into the inside of the force transmission screw.

[0014] As a further preferred, the inside of the force transmission screw is a hollow structure, and the rotating end of the push-pull pipe machine is provided with a water injection hole in communication with the inside of the force transmission screw.

[0015] As a further preferred, the top of the push-pull pipe machine is provided with a laser theodolite.

[0016] A jacking process of a one-time hole-forming PVC micro-jacking device, characterized in that the specific process flow is as follows:

[0017] Miniature steel caisson construction:

[0018] First, excavate the starting steel well and the receiving steel well, and precast circular starting and receiving openings at multiple positions, the actual opening position is determined according to the jacking elevation, and is assisted by double flanges and rubber rings, and is sealed by adding an outer cover, after sinking to the preset height, remove the outer cover of the steel well of the required height, continue to retain the outer cover and seal in the steel well opening area not used in this project, the excavation depth of the soil body at the bottom of the receiving steel well should be flush with the lowest point of the pipeline, the soil body of the starting steel well needs to reserve equipment assembly space, and the bottom soil body is leveled;

[0019] Equipment assembly:

[0020] Lay the sedimentation tank and high-pressure pump machine, place the push-pull pipe machine on the receiving steel well, adjust the level and height to the preset position, place the operation platform on the push-pull pipe machine, place the push-pull pipe machine in front of the rear seat, connect the jacking cylinder with the push-pull pipe machine, and place the laser theodolite, connect the communication line, hydraulic oil circuit unit, water inlet circuit, install the drill bit, connect the PVC pipe, jacking cylinder and force transmission screw behind the tunneling machine, wherein the jacking cylinder is connected behind the tunneling machine, the force transmission screw is located between the upper and lower jacking cylinders, and the PVC pipe to be laid is located outside the jacking cylinder.

[0021] Jacking starting:

[0022] The jacking machine and PVC pipe material connected behind it, top cylinder and force screw are jacked into the starting hole into the soil by using the push-pull pipe machine. The other end of the force screw is connected with the rotating device in the push-pull pipe machine. The jacking force is divided into two parts, the head-on resistance of the jacking machine and the pipe side friction resistance in the subsequent jacking process. The force screw can transmit part of the jacking force to the jacking machine to balance the head-on resistance, and the push-pull pipe machine applies part of the jacking force to the pipe cross section;

[0023] Pipe section advancement:

[0024] The water inlet circuit in the force screw is opened, the force screw rotation oil circuit is opened, after the stable water outlet of the force screw, the advancement oil circuit is opened, the whole is advanced forward, with the advancement of the pipe jacking, the subsequent PVC pipe material, top cylinder and force screw should also be lengthened to ensure the continuous jacking of the pipe jacking, and the pipe section cross section is attached to the push-pull pipe machine to bear the jacking force.

[0025] Completion of advancement, recovery equipment:

[0026] After the jacking equipment enters the receiving steel well, the laying of the PVC pipe material is completed through one-time hole forming, then the jacking equipment is recovered, the force screw is retracted and pulled out, and finally the steel micro caisson is pulled out and recovered after the outer cover is added.

[0027] (Three) beneficial effects

[0028] The application provides a PVC micro pipe jacking device and a pipe jacking process.

[0029] Beneficial effects:

[0030] The PVC micro pipe jacking device and the pipe jacking process apply the micro pipe jacking technology to the laying of plastic pipe, which is more mature, and compared with traditional plastic pipe laying methods such as directional drilling and directional drilling, the step of multiple reaming is omitted, and the one-time hole forming advantage is obtained. Secondly, because the mechanical properties of plastic pipe are lower than those of concrete, steel or cast iron pipe, in order to solve this problem, the force screw is directly connected with the pipe jacking mechanism, and part of the jacking force is transmitted through the force screw to balance the head-on resistance in front of the jacking machine and share the stress of the PVC pipe. The PVC pipe wall only bears the friction resistance, so as to prevent instability or damage of the PVC pipe in the jacking process, so that the pipe jacking technology is applied to the laying of plastic pipe. BRIEF DESCRIPTION OF DRAWINGS

[0031] Figure 1 It is a structural schematic diagram of the application;

[0032] Figure 2 It is an enlarged view of the local structure of the application;

[0033] Figure 3This is a side view of the receiving steel well of the present invention;

[0034] Figure 4 This is a partial structural side view of the present invention.

[0035] In the diagram: 1. Soil layer; 2. Sedimentation tank; 3. High-pressure pump; 4. Control panel; 5. Starting steel shaft; 6. Laser theodolite; 7. Hydraulic unit; 8. Receiving steel shaft; 9. PVC miniature pipe jacking mechanism; 10. Push-pull pipe machine; 11. Rear seat; 12. Cutter head; 13. PVC miniature pipe jacking machine body; 14. Connecting joint; 15. PVC pipe; 16. Jacking cylinder; 17. Force transmission screw; 18. Miniature pipe jacking machine head; 19. Flange and rubber ring; 20. Outer cover; 21. Opening. Detailed Implementation

[0036] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0037] like Figure 1 , 3 As shown, the present invention provides a technical solution: a one-time hole-forming PVC micro jacking device and its jacking process, including a soil layer 1, on both sides of which a receiving steel well 8 and a launching steel well 5 are vertically arranged downwards, and on the top of the soil layer 1 are a sedimentation tank 2, a high-pressure pump 3 and a hydraulic unit 7 (providing hydraulic power).

[0038] like Figure 1 As shown, at least two sets of high-pressure pumps 3 are provided. One set is connected to the sedimentation tank 2. This set of high-pressure pumps 3 can extract the sludge from the inside of the top cylinder 16. The other set of high-pressure pumps 3 is used to inject water into the inside of the force transmission screw 17.

[0039] like Figure 1 As shown, the starting steel well 5 is equipped with an operating platform 4, a push-pull pipe machine 10, and a rear seat 11 for supporting the push-pull pipe machine 10. The hydraulic unit 7 is connected to the push-pull pipe machine 10 through hydraulic pipelines.

[0040] like Figure 2 As shown, the rotating end of the push-pull tube machine 10 is rotatably connected to a force transmission screw 17. The inside of the force transmission screw 17 is a hollow structure, and the rotating end of the push-pull tube machine 10 is provided with a water injection hole that communicates with the inside of the force transmission screw 17. The outside of the force transmission screw 17 is covered with a top cylinder 16, and the outside of the top cylinder 16 is covered with a PVC pipe 15. One end of the PVC pipe 15 abuts against the end face of the push-pull tube machine 10.

[0041] As Figure 1 shown, the top of the push-pull pipe machine 10 is provided with a laser theodolite 6, through which the hole position can be detected in time whether it is deviated.

[0042] As Figure 2 shown, the end of the force transmission screw rod 17 away from the push-pull pipe machine 10 is provided with a PVC micro-top pipe mechanism 9, which includes a PVC micro-top pipe machine body part 13 and a micro-top pipe machine head 18. The micro-top pipe machine head 18 is coaxially fixed with the force transmission screw rod 17, and a cutter head 12 is arranged at the axis of the micro-top pipe machine head 18. The PVC micro-top pipe mechanism 9 is fixed with the PVC pipe material 15 through a cylindrical connecting joint 14.

[0043] A top pipe process of a one-time hole forming PVC micro-top pipe device, the specific process flow is as follows:

[0044] Micro steel caisson construction:

[0045] First, excavate the starting steel well 5 and the receiving steel well 8, and precast the circular starting and receiving holes 21 at multiple positions, Figure 4 three groups of holes 21 are shown, the actual opening position is determined according to the top pipe elevation, and is assisted by double flanges and rubber rings 19, and is sealed by adding an outer cover 20. After sinking to the preset height, remove the outer cover 20 of the steel well of the required height. The outer cover 20 of the steel well hole 21 area which is not needed in this project continues to be sealed. The bottom soil of the receiving steel well 8 should be excavated to the same level as the lowest point of the pipeline. The soil of the starting steel well 5 needs to reserve equipment assembly space, and the bottom soil is leveled.

[0046] Equipment assembly:

[0047] Lay the sedimentation tank 2 and the high-pressure pump machine 3, place the push-pull pipe machine 10 on the receiving steel well 8, adjust the level and height to the preset position, place the operation platform 4 on the push-pull pipe machine 10, place the push-pull pipe machine 10 in front of the rear seat 11, connect the top cylinder 16 with the push-pull pipe machine 10, and place the laser theodolite 6, connect the communication line, the hydraulic oil circuit unit 7, the water inlet circuit, install the drill bit, connect the PVC pipe material 15, the top cylinder 16, and the force transmission screw rod 17 behind the tunneling machine. Among them, the top cylinder 16 is connected behind the tunneling machine, the force transmission screw rod 17 is located between the upper and lower top cylinders 16, and the PVC pipe material 15 to be laid is located outside the top cylinder 16.

[0048] Top pipe starting:

[0049] The jacking machine and the PVC pipe 15, the top cylinder 16 and the force transmission screw 17 connected after the jacking machine are pushed into the starting hole 21 into the soil by the push-pull pipe machine 10. The other end of the force transmission screw 17 is connected with the rotating device in the push-pull pipe machine 10. The jacking force is divided into two parts, the head-on resistance of the jacking machine and the pipe side friction resistance in the subsequent jacking process. The force transmission screw 17 can transmit part of the jacking force to the jacking machine to balance the head-on resistance, and the push-pull pipe machine 10 applies part of the jacking force to the pipe cross section.

[0050] Pipe section advancement:

[0051] The water inlet circuit in the force transmission screw 17 is opened, the force transmission screw 17 rotating oil circuit is opened, after the force transmission screw 17 stable water outlet, the advancing oil circuit is opened, the whole body is pushed forward, with the advancement of the pipe jacking, the subsequent PVC pipe 15, top cylinder 16, force transmission screw 17 should also be lengthened to ensure the continuous jacking of the pipe jacking, the pipe section cross section is attached to the push-pull pipe machine 10, and bears the jacking force.

[0052] Completion of the advancement, recovery equipment:

[0053] After the jacking equipment enters the receiving steel well 8, the laying of the PVC pipe 15 is completed through one-time hole forming, then the jacking equipment is recovered, the force transmission screw 17 is retracted and pulled out, and finally the steel micro caisson is pulled out and recovered after the outer cover 20 is added.

[0054] Meanwhile, the contents not described in detail in the specification are all existing technologies known to those skilled in the art.

[0055] In use, first, the PVC pipe 15 is placed at the bottom of the starting steel well 5 and in front of the push-pull pipe machine 10, then the top cylinder 16 is placed inside the PVC pipe 15, then the force transmission screw 17 is installed at the rotating end of the push-pull pipe machine 10, and finally the force transmission screw 17 is inserted into the top cylinder 16. At this time, the tail end of the PVC pipe 15 abuts against the cross section of the push-pull pipe machine 10.

[0056] Start the hydraulic unit 7 to drive the push-pull pipe machine 10 to push, and at the same time, the rotating end of the push-pull pipe machine 10 drives the force transmission screw 17 to rotate, so that the force transmission screw 17 can be pushed forward in a screwing-in manner, and the cutter head 12 is driven by the force transmission screw 17 to perform the hole opening operation.

[0057] During the hole opening process, part of the jacking force is transmitted by the force transmission screw 17 to balance the head-on resistance in front of the jacking machine and share the stress of the PVC pipe 15. The PVC pipe 15 wall only bears the friction resistance, preventing it from losing stability during jacking, and also providing protection to it.

[0058] At the same time, through two groups of high-pressure pump machines 3, one group of high-pressure pump machines 3 (not shown in the figure) injects high-pressure water flow into the force transmission screw rod 17 to mix the excavated soil to form slurry for convenient discharge, and the other group of high-pressure pump machines 3 penetrates into the gap between the force transmission screw rod 17 and the top cylinder 16, and the slurry is extracted through the gap to the sedimentation tank 2 for temporary storage.

[0059] With the advancement of the pipe jacking, the subsequent PVC pipe 15 should be quickly connected, and the top cylinder 16 and the force transmission screw rod 17 are also lengthened to ensure the continuous jacking of the pipe jacking.

[0060] In summary, the one-time hole-forming PVC micro pipe jacking device and its pipe jacking process apply micro pipe jacking technology to the laying of plastic pipe, which is more mature, and compared with traditional plastic pipe laying methods such as guided drilling and directional drilling, the step of multiple reaming is omitted, which has the advantage of one-time hole forming. Secondly, because the mechanical properties of plastic pipe are lower than those of concrete, steel or cast iron pipe, in order to solve this problem, we directly connect the force transmission screw rod with the pipe jacking mechanism, and transfer part of the jacking force through the force transmission screw rod to balance the resistance in front of the excavator and share the stress of the PVC pipe. The PVC pipe wall only bears the frictional resistance to prevent instability or damage during jacking, thereby realizing the grafting of pipe jacking technology in the application of plastic pipe laying.

[0061] It should be noted that the electrical components appearing in this text are all connected to the main controller and 380V mains electricity, and the main controller can be a computer or other conventional known device that can be controlled, and its control principle, internal structure and control switch mode are all conventional means of prior art, which are directly quoted here without further description. In this text, relationship terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between the entities or operations. Moreover, the terms "include", "contain" or any other variant thereof are intended to cover non-exclusive inclusion, so that the process, method, article or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such process, method, article or device.

[0062] Although embodiments of the present application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A pipe jacking process for a one-pit PVC micro-jacking pipe device, characterized in that: Including soil layer (1), the two sides of the soil layer (1) are vertically provided with receiving steel well (8) and originating steel well (5) respectively, and the top of the soil layer (1) is provided with sedimentation tank (2), high pressure pump (3) and hydraulic unit (7) respectively; The originating steel well (5) is provided with operating table (4), push-pull pipe machine (10) and rear seat (11) for supporting push-pull pipe machine (10) respectively, and the hydraulic unit (7) is communicated with push-pull pipe machine (10) through hydraulic pipeline; The rotating end of push-pull pipe machine (10) is rotatably connected with power screw (17), the outside of power screw (17) is covered with top cylinder (16), the outside of top cylinder (16) is covered with PVC pipe (15), one end of PVC pipe (15) abuts at the end face of push-pull pipe machine (10), and the top of push-pull pipe machine (10) is provided with laser theodolite (6); The end of power screw (17) away from push-pull pipe machine (10) is provided with PVC micro-tube jacking mechanism (9), and the PVC micro-tube jacking mechanism (9) is fixed with PVC pipe (15) through cylindrical connecting joint (14); The PVC micro-tube jacking mechanism (9) comprises PVC micro-tube machine body part (13) and micro-tube machine head (18), the micro-tube machine head (18) is coaxially fixed with power screw (17), and cutter head (12) is arranged at the axis of micro-tube machine head (18); The high pressure pump (3) is provided with at least two groups, one group of which is communicated with sedimentation tank (2), and the group of high pressure pump (3) can pump out the mud inside top cylinder (16), and the other group of high pressure pump (3) is used for injecting water into power screw (17); The inside of power screw (17) is a hollow structure, and the rotating end of push-pull pipe machine (10) is provided with water injection hole communicated with the inside of power screw (17); The specific process flow is as follows: (1) Miniature steel caisson construction: First, excavate originating steel well (5) and receiving steel well (8), and precast circular originating and receiving openings at multiple positions, determine the actual opening position according to the jacking elevation, and assist with double flange and rubber ring (19), and add outer cover (20) for sealing, after sinking to the preset height, remove the outer cover (20) of the steel well of the required height, continue to seal the outer cover (20) in the area of the steel well opening (21) not used in this project, the bottom soil of receiving steel well (8) should be excavated to the same level as the lowest point of the pipeline, and the soil of originating steel well (5) needs to reserve equipment assembly space, and the bottom soil is leveled; (2) Equipment assembly: The sedimentation tank (2) and the high-pressure pump (3) are laid, the push-pull pipe machine (10) is placed on the starting steel well (5), the horizontal and height are adjusted to the preset position, the operation platform (4) is placed on the push-pull pipe machine (10), the push-pull pipe machine (10) is placed in front of the rear seat (11), the top cylinder (16) is connected with the push-pull pipe machine (10), and the laser theodolite (6) is placed, the communication line, the hydraulic oil circuit unit (7) and the water inlet circuit are connected, the drill bit is installed, the PVC pipe (15), the top cylinder (16) and the power screw (17) are connected behind the tunneling machine, the top cylinder (16) is connected behind the tunneling machine, the power screw (17) is located between the upper and lower top cylinders (16), and the PVC pipe (15) to be laid is located outside the top cylinder (16); (3) Starting of the pipe jacking: The tunneling machine, the PVC pipe (15), the top cylinder (16) and the power screw (17) connected behind the tunneling machine are jacked into the starting hole (21) and into the soil body by the push-pull pipe machine (10), the other end of the power screw (17) is connected with the rotating device in the push-pull pipe machine (10), the jacking force in the subsequent jacking process is divided into two parts, the tunneling machine resistance and the pipe side friction resistance, the power screw (17) can transmit part of the jacking force to the tunneling machine to balance the resistance, and the push-pull pipe machine (10) applies part of the jacking force to the pipe cross section; (4) Pipe joint pushing: The water inlet circuit in the power screw (17) is opened, the rotating oil circuit of the power screw (17) is opened, after stable water outlet outside the power screw (17), the pushing oil circuit is opened, the whole is pushed forward, with the pushing of the pipe jacking, the subsequent PVC pipe (15), the top cylinder (16) and the power screw (17) are also lengthened to ensure the continuous jacking of the pipe jacking, the pipe joint cross section is attached to the push-pull pipe machine (10), and bears the jacking force; (5) Completion of pushing and recovery of equipment: After the tunneling equipment enters the receiving steel well (8), the laying of the PVC pipe (15) is completed through one-time hole forming, then the tunneling equipment is recovered, the power screw (17) is retracted and pulled out, and finally the steel micro caisson is added with the outer cover (20) and pulled out and recovered as a whole.

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