Split type jacking device for long-distance pipe network construction and construction method

Abstract

This application provides a split-type jacking device and construction method for long-distance pipeline construction, relating to the field of pipeline construction. It includes a hydraulic jacking mechanism and a connecting mechanism. The hydraulic jacking mechanism includes a jacking cylinder and a pusher plate. The jacking cylinder is located on the ground, and the pusher plate is located inside the working well. The connecting mechanism includes a frame, with the pusher plate located at the lower part of the frame. The jacking cylinder pushes the upper part of the frame, and the pusher plate pushes or pulls the drill rod into or out of the inner wall of the working well. The frame is U-shaped, and the side wall of the pusher plate is fixedly connected to the lower part of the frame. A pair of slide rails are installed at the wellhead of the working well, and a pair of sliders are symmetrically arranged on the outer wall of the frame. The frame is mounted on the slide rails via the sliders and slides on the slide rails. The pair of jacking cylinders push and pull the two vertical ends of the frame simultaneously. This application has the effect of improving the speed of drill rod jacking and increasing construction speed.

Description

Technical Field

[0001] This application relates to the field of pipeline construction, and in particular to a split-type jacking device for long-distance pipeline construction. In addition, it also relates to a construction method for the split-type jacking device for long-distance pipeline construction. Background Technology

[0002] In water conservancy projects, trenchless construction technology is now widely used for the construction of water supply and drainage pipelines. In important construction areas, this avoids road occupation and traffic congestion. Traditional hydraulic pipeline construction often uses micro-jacking construction technology with earth pressure balance and slurry balance methods in a single construction phase.

[0003] Currently, pipe jacking machines mainly consist of a rotary excavation system, a main jacking hydraulic propulsion system, a soil conveying system, a grouting system, surveying equipment, ground hoisting equipment, and an electrical system. During the forward excavation process of the rotary excavator system, the main jacking hydraulic propulsion system, located in the working shaft, pushes the prefabricated pipe into the excavated channel, thus laying the pipe.

[0004] However, due to limitations in the power and guiding accuracy of the main jacking hydraulic propulsion system, when carrying out ultra-long shallow jacking construction, if the power of the main jacking hydraulic propulsion system is low and the working space provided by the working shaft to the main jacking hydraulic propulsion system is small, there will be problems such as a low effective jacking distance and slow construction speed. Summary of the Invention

[0005] To address the problem of slow construction speed caused by the inability to quickly advance drill pipes over long distances due to limited working space, this application provides a split-type jacking device and construction method for long-distance pipeline construction.

[0006] In the first aspect, this application provides a split-type jacking device for long-distance pipeline construction, which adopts the following technical solution:

[0007] A split-type jacking device for long-distance pipeline construction includes a hydraulic jacking mechanism and a connecting mechanism. The hydraulic jacking mechanism includes a jacking rod cylinder and a pusher plate. The jacking rod cylinder is located on the ground, and the pusher plate is located inside the working well. The connecting mechanism includes a frame, and the pusher plate is located at the lower part of the frame. The jacking rod cylinder pushes the upper part of the frame, and the pusher plate pushes or pulls the drill rod into or out of the inner wall of the working well.

[0008] By adopting the above technical solution, the pusher plate is retained inside the working well, while the top rod cylinder is placed on the ground. The push rod of the top rod cylinder is connected to the pusher plate through the frame. In this way, a longer drill rod can be placed in the limited space of the working well, and the top rod cylinder can be placed on the ground. This allows the use of a large-volume top rod cylinder with high thrust to push the frame and pusher plate, and to push a long drill rod into the soil layer in one go. This effectively improves the driving efficiency of the top rod cylinder for the drill rod, and leaves more space for the installation of the drill rod. The structure is reasonable and can maintain a faster construction speed.

[0009] Optionally, the frame is U-shaped, the side wall of the pusher is fixedly connected to the lower part of the frame, a pair of slide rails are mounted at the wellhead of the working well, a pair of sliders are symmetrically mounted on the outer wall of the frame, and the frame is mounted on the slide rails via the sliders and slides on the slide rails;

[0010] The pair of push rod cylinders push and pull the two vertical ends of the frame respectively and simultaneously.

[0011] By adopting the above technical solution, the cooperation between the slide rail and the slider realizes the fixation of the frame in the vertical position, and under the push of the top rod cylinder, it ensures that the frame can slide between a pair of slide rails along the length of the slide rails, so that the frame can smoothly transmit the thrust generated by the top rod cylinder, ensuring that the top rod cylinder can reliably push the push plate, and thus ensuring that the top rod cylinder can push the drill rod into the soil layer.

[0012] Optionally, two support plates are provided between the pair of slide rails, and the two support plates are respectively and correspondingly attached to a pair of inner walls of the working well;

[0013] A pair of first sliding rods are provided between the two support plates. The pair of first sliding rods pass through the two vertical ends of the frame respectively and in a one-to-one correspondence. The connection between the first sliding rods and the frame is located at the lower part of the frame.

[0014] By adopting the above technical solution, two support plates are detachably installed at the bottom of a pair of slide rails. After the top rod cylinder pushes the frame, the two vertical ends of the frame can slide on a pair of first slide rods, which improves the stability of the frame displacement and ensures that the push of the top rod cylinder will not cause the frame to tip over. Furthermore, under the supporting action of the pair of first slide rods, the two support plates can reliably fit against the inner wall of the working well, thereby playing a protective role for the working well and preventing the top rod cylinder at the wellhead from exerting too much force on the ground, which could cause the working well to collapse.

[0015] Optionally, the pair of slide rails are located above the wellhead of the working well and close to the inner wall of the working well.

[0016] By adopting the above technical solution, the slide rail can reliably cooperate with the slider to support the frame, while not interfering with the operator's ability to hoist drill rods or other objects into or out of the working well.

[0017] Optionally, a pair of support seats are provided on the ground, the pair of support seats are respectively located on both sides of the working well, and a pair of second slide rods are passed between the pair of support seats. The pair of second slide rods pass through the two vertical ends of the frame respectively and in a one-to-one correspondence. The connection between the second slide rod and the frame is located at the upper part of the frame.

[0018] The push rod cylinder pushes the frame to slide on the first slide rod, the second slide rod, and the slide rail.

[0019] By adopting the above technical solution, a pair of second slide rods are fixed between a pair of support seats, and the pair of second slide rods pass through the upper part of the vertical end of the frame. In this way, the upper part of the frame is supported by the second slide rods, the middle part of the frame is supported by the slide rail, and the lower part of the frame is supported by the first slide rod. The first slide rod, the second slide rod, and the slide rail are in a parallel state, thereby ensuring that the frame can smoothly move under the push of the push rod cylinder, and thus drive the push plate to push or pull the drill rod along the axial direction of the drill rod.

[0020] Optionally, the drill rod is provided with a connector at one end near the pusher, the connector is H-shaped, and two adjacent drill rods are respectively sleeved on both ends of the connector;

[0021] The pusher plate has a through hole in the middle, and the drill rod passes through the through hole. The pusher plate has several clamping cylinders on the side facing the drill rod. The push rods of the clamping cylinders all point to the axis of the through hole and are all locked in the groove of the connector.

[0022] By adopting the above technical solution, when a drill rod is pushed into the soil layer and the connector on the drill rod is exposed, another drill rod is inserted into the borehole and inserted into the connector of the previous drill rod. Then, the push rod of the clamping cylinder extends and inserts into the groove in the middle of the connector, thereby clamping the connector. In this way, when the push rod cylinder extends forward, the drill rod can be pushed into the soil layer. When the clamping cylinder keeps the connector locked and the push rod cylinder retracts backward, the drill rod can be pulled back into the working well.

[0023] Optionally, the drill pipe and the connector are either interference fit or connected by threads.

[0024] By adopting the above technical solution, the drill rod and the connector can be interference fit, and the drill rod is sleeved on the outside of the connector. The drill rod and the connector can also be threaded. This ensures that multiple drill rods can be connected in a state that is easy to disassemble and assemble, thereby ensuring that the drill rod can be pushed in and pulled out by extending or retracting the push rod cylinder.

[0025] Optionally, a receiving well is also provided on the ground, and a pipe jacking cylinder is provided in the receiving well. The pipe jacking cylinder pushes the precast pipe in the direction of the working well.

[0026] By adopting the above technical solution, after the first drill rod breaks through the soil layer and enters the receiving well, the probe and guide rod on the first drill rod can be removed (the signal collected by the probe can be analyzed and transmitted to the guide rod through remote control, thereby adjusting the drilling direction of the guide rod and ensuring that the drilling direction of the drill rod maintains high accuracy). The conical reamer and pipe puller are then installed. In this way, through the cooperation of the jacking cylinder and the clamping cylinder, the inner diameter of the hole drilled by the drill rod can be enlarged during the drill rod recovery process, and the precast pipe can be brought into the enlarged hole. At the same time, the jacking cylinder pushes all subsequent precast pipes into the hole one by one.

[0027] Optionally, a back plate is provided between the jacking cylinder and the inner wall of the receiving well, the jacking cylinder is in contact with the back plate, and the lower part of the back plate is located below the bottom of the receiving well.

[0028] By adopting the above technical solution, it is ensured that the receiving well can withstand the counter-thrust force generated by the jacking cylinder pushing the precast pipe under the support of the back plate, so that the fit between two adjacent precast pipes is tighter when the precast pipe is pulled back and laid.

[0029] Secondly, this application provides a construction method for a split-type jacking device for long-distance pipeline construction, employing the following technical solution:

[0030] The construction method for a split-type jacking device used in long-distance pipeline construction includes the following steps:

[0031] S1. Excavate a working well and a receiving well on the ground, and place a slide rail at the opening of the working well, place a second slide rod above the opening of the working well, and place a first slide rod below the opening of the working well.

[0032] S2. Assemble the frame and tighten the push rod of the push rod cylinder to the frame with bolts;

[0033] S3. Install a probe and guide rod at one end of the first drill rod and a connector at the other end. Insert the other end of the first drill rod into the through hole of the push plate and insert the push rod of the clamping cylinder into the groove of the first drill rod.

[0034] S4. The push rod cylinder is activated, pushing the frame and push plate to push the first drill rod into the soil. When the connector of the first drill rod is about to enter the soil, the push rod cylinder stops. After the clamping cylinder resets, the push rod cylinder resets, and then one end of the second drill rod is inserted into the connector of the first drill rod. At the same time, a connector is installed on the other end of the second drill rod. After the clamping cylinder clamps the connector of the second drill rod, the push rod cylinder is activated again. This process is repeated to form a small-diameter hole.

[0035] S5. After the first drill pipe is fully inserted into the receiving well, the top rod cylinder stops operating, the probe and guide rod are removed, and a tapered reamer and a pipe puller are installed at the end of the first drill pipe. A prefabricated pipe is fitted on the outside of the pipe puller.

[0036] S6. The top rod cylinder is reset, pulling all drill rods, tapered reamers, pipe pullers and the first precast pipe into the borehole and moving towards the working well.

[0037] S7. After the first precast pipe is fully inserted into the hole, the remaining precast pipes are pushed into the hole by the pipe jacking cylinder, and the drill rods are removed one by one in the working well until the hole, which has been expanded by the conical reamer, is completely filled with precast pipes.

[0038] By adopting the above technical solution, the efficiency of the jacking cylinder in pushing the drill rod at one time can be improved, and the laying of multiple precast pipes can be achieved through the pullback of the tapered expander and the jacking action of the pipe jacking cylinder.

[0039] In summary, this application has the following beneficial effects:

[0040] 1. By placing the top rod cylinder on the ground, a top rod cylinder with greater thrust can be selected to push the longer drill pipe in the working well, which improves the pushing efficiency of the top rod cylinder on the drill pipe and leaves more space in the working well for the assembly and recovery of the drill pipe.

[0041] 2. Installing probes and guide rods on the first drill rod and adjusting the drilling direction remotely can improve the drilling accuracy of the drill rod.

[0042] 3. Utilizing the short and straight characteristics of a single drill rod, the pipeline is positioned and located. Then, during the reverse pull-back process of the drill rod, the conical expander can enlarge the hole drilled by the drill rod. In conjunction with the pipe jacking cylinder, multiple prefabricated pipes are pushed from the receiving well toward the working well to realize the pipeline laying. This reduces the frontal pressure on the soil-facing surface of the prefabricated pipe during the laying process and effectively prevents ground heave or settlement. Attached Figure Description

[0043] Figure 1 This is a schematic perspective view of this application;

[0044] Figure 2 yes Figure 1 Enlarged structural diagram at point A;

[0045] Figure 3 This is a cross-sectional view of the internal structure of this application. Figure 1 This shows the state of the drill pipe being pushed forward;

[0046] Figure 4 This is a reference diagram showing the assembly state of the pusher plate and the frame;

[0047] Figure 5 This is a cross-sectional view of the internal structure of this application. Figure 2 This shows the state of the drill pipe being pulled out;

[0048] In the diagram: 1. Push rod cylinder;

[0049] 2. Push plate; 21. Perforation; 22. Clamping cylinder;

[0050] 3. Working well; 31. Slide rail; 32. Support plate; 33. First slide rod;

[0051] 4. Frame; 40. Slider;

[0052] 5. Drill rod; 50. Connector; 500. Groove;

[0053] 6. Support base; 60. Second slide bar;

[0054] 7. Receiving well; 71. Pipe jacking cylinder; 72. Backplate;

[0055] 8. Conical expander; 9. Pipe puller; 10. Precast pipe. Detailed Implementation

[0056] The following is in conjunction with the appendix Figure 1-5 This application will be described in further detail.

[0057] This embodiment discloses a split-type jacking device for long-distance pipeline construction.

[0058] Figure 1 This is a schematic perspective view of this application. Figure 2 yes Figure 1 A magnified structural diagram at point A. See also Figure 1 and Figure 2A split-type jacking device for long-distance pipeline construction includes a hydraulic jacking mechanism and a connecting mechanism. The hydraulic jacking mechanism includes a jacking cylinder 1 and a push plate 2. The jacking cylinder 1 is located on the ground, and a working well 3 and a receiving well 7 are spaced apart on the ground. The push plate 2 is located inside the working well 3. The connecting mechanism includes a frame 4, which is spliced ​​from four beams in a U-shape. Part of the frame 4 is located inside the working well 3, and another part is located above the working well 3. The push plate 2 is detachably connected to the lower part of the frame 4, and the push rod of the jacking cylinder 1 is detachably connected to the upper part of the frame 4.

[0059] The top rod cylinder 1 is placed on the ground. When the push rod of the top rod cylinder 1 extends, it can push the frame 4 to move. Since the push plate 2 is connected to the frame 4, the displacement of the frame 4 can drive the push plate 2. In other words, a top rod cylinder 1 with a larger thrust can be selected to drive the push plate 2, thereby pushing the drill rod 5, which is mounted on the push plate 2, into the soil layer. This avoids the situation where, when the top rod cylinder 1 is placed in the working well 3, only a smaller top rod cylinder 1 with a smaller thrust can be selected to push the drill rod 5, resulting in lower overall efficiency. By placing the top rod cylinder 1 on the ground, the amount of drilling rod 5 pushed in one time can be increased, enabling rapid pushing of the drill rod 5 and improving the construction speed.

[0060] Figure 3 This is a cross-sectional view of the internal structure of this application. Figure 1 This shows the state of the drill pipe being pushed forward. See also Figure 3 A pair of support bases 6 and a pair of slide rails 31 are provided on the ground. The pair of support bases 6 are located on both sides of the working well 3. A pair of second slide rods 60 are provided between the pair of support bases 6, and the pair of second slide rods 60 pass through the upper part of the two vertical ends of the frame 4. The pair of slide rails 31 are mounted on both sides of the well opening of the working well 3. A pair of sliders 40 are provided in the middle of the outer wall of the frame 4. The frame 4 is mounted between the pair of slide rails 31 by the sliders 40 and can slide on the slide rails 31. Two support plates 32 are provided at the bottom of the frame 4. The support plates 32 are in contact with the inner wall of the working well 3. Two first slide rods 33 are provided between the two support plates 32, and the two first slide rods 33 pass through the lower part of the two vertical ends of the frame 4.

[0061] When the push rod of the push rod cylinder 1 extends and pushes the frame 4, the frame 4 can smoothly move under the support of the first slide rod 33, the second slide rod 60, and the slide rail 31. Furthermore, since the first slide rod 33 passes through the lower part of the frame 4, the second slide rod 60 passes through the upper part of the frame 4, and the slide rail 31 is located in the middle of the frame 4, and the extension directions of the first slide rod 33, the second slide rod 60, and the slide rods are parallel to each other, the frame 4 can evenly and efficiently transmit the thrust output by the push rod cylinder 1 after it pushes the upper part of the frame 4. This ensures that the push plate 2 can be moved while maintaining its own balance and improving overall stability. Furthermore, under the supporting action of the pair of first slide rods 33, the two support plates 32 reliably fit against the inner wall of the working well 3, preventing the working well 3 from collapsing.

[0062] Figure 4 This is a reference diagram showing the assembly state of the pusher plate and the frame. See also... Figure 4 and combined Figure 3 Driven by the push rod cylinder 1, the pusher plate 2 pushes in or pulls out the drill rod 5. One end of the first drill rod 5 is equipped with a probe and a guide rod, and the other end is equipped with a connector 50, which is H-shaped. One end of the remaining drill rods 5 is connected to the connector 50 of the previous drill rod 5, and the other end is also equipped with a connector 50. The pusher plate 2 has a through hole 21 in the middle. Several clamping cylinders 22 are provided on the pusher plate 2 and on the outer wall of the through hole 21. The push rods of the clamping cylinders 22 all point to the axis of the through hole 21. The drill rod 5 passes through the through hole 21 (the drill rod 5 can also abut against the surface of the pusher plate 2. In this case, the outer diameter of the drill rod 5 is larger than the inner diameter of the through hole 21, and the pusher plate 2 directly pushes the drill rod 5 into the soil layer). When the push rod of the clamping cylinder 22 extends out, it can fit into and be locked in the groove 500 in the middle of the connector 50.

[0063] See Figure 3 and Figure 4When the end of the probe contacts the inner wall of the working well 3, the connector 50 of the drill rod 5 is clamped by the push rods of multiple clamping cylinders 22. Then, the push rod cylinder 1 actuates, driving the frame 4 and push plate 2, thereby pushing the probe, guide rod, and drill rod 5 into the soil. Once a drill rod 5 is fully inserted into the soil, the clamping cylinders 22 and push rod cylinder 1 are reset sequentially. The next drill rod 5 is then inserted into the connector 50 of the previous drill rod 5 via an interference fit or threaded connection. The clamping cylinders 22 and push rod cylinder 1 then push it out sequentially, thus enabling multiple drill rods to be inserted. The sequential advancement of drill rod 5 utilizes the short and straight characteristics of a single drill rod 5 to locate the laying direction of the pipeline and form a hole with a small inner diameter. During the drilling process of drill rod 5, the status information of the guide rod is collected by the probe and transmitted to the manually operated receiver, thereby remotely controlling the drilling direction of the guide rod. The drilling direction of drill rod 5 can be adjusted, and the adjustment accuracy is higher than that of the laser guide instrument. Then, by reversing the operation, the drill rod 5 can be pulled out of the soil layer by utilizing the interference between the push rod of clamping cylinder 22 and the groove 500 of connector 50.

[0064] Figure 5 This is a cross-sectional view of the internal structure of this application. Figure 2 This shows the drill pipe being pulled out. See also Figure 5 The receiving well 7 is equipped with a back plate 72 and a jacking cylinder 71. The back plate 72 is located behind the jacking cylinder 71 and is inserted below the bottom of the receiving well 7. After the jacking cylinder 1 pulls out several drill rods 5 and enlarges the hole formed by the drill rods 5 through the conical expander 8, the jacking cylinder 71 can push the precast pipe 10 into the enlarged hole to complete the laying of the precast pipe 10. The back plate 72 can withstand the counter-thrust generated by the jacking cylinder 71, making the fit between two adjacent precast pipes 10 higher. During the laying process, it can reduce the front pressure on the soil-facing surface of the precast pipe 10 and effectively prevent ground heave or settlement.

[0065] This embodiment also discloses a construction method for a split-type jacking device used in long-distance pipeline construction.

[0066] The construction method for a split-type jacking device used in long-distance pipeline construction includes the following steps:

[0067] S1. Excavate a working well 3 and a receiving well 7 on the ground, and place a slide rail 31 at the wellhead of the working well 3, place a second slide rod 60 above the wellhead of the working well 3, and place a first slide rod 33 below the wellhead of the working well 3.

[0068] S2. Assemble the frame 4, insert the first slide rod 33 and the second slide rod 60 into the frame 4, and place the slider 40 of the frame 4 on the slide rail 31. Adjust the angle of the support seat 6 and the slide rail 31 to ensure that the first slide rod 33, the second slide rod 60 and the slide rail 31 are parallel to each other. Then, tighten the push rod of the push rod cylinder 1 with the frame 4 with bolts.

[0069] S3. Install a probe and guide rod at one end of the first drill rod 5 and a connector 50 at the other end. Insert the other end of the first drill rod 5 into the through hole 21 of the push plate 2. The push rod of the clamping cylinder 22 extends into the groove 500 of the first drill rod 5.

[0070] S4. The top rod cylinder 1 is activated, pushing the frame 4 and the push plate 2 to push the first drill rod 5 into the soil layer at a speed of 5~8m / s. When the connector 50 of the first drill rod 5 is about to enter the soil layer, the top rod cylinder 1 stops. After the clamping cylinder 22 is reset, the top rod cylinder 1 is reset, and then one end of the second drill rod 5 is inserted into the connector 50 of the first drill rod 5. At the same time, the connector 50 is installed on the other end of the second drill rod 5. Then the push rod of the clamping cylinder 22 extends again and is inserted into the groove 500 of the connector 50 of the second drill rod 5. The top rod cylinder 1 is activated again. This process is repeated to realize the sequential pushing of multiple drill rods 5 and to form a small-diameter hole in the soil layer.

[0071] S5. When the first drill pipe 5 is fully inserted into the receiving well 7, the top rod cylinder 1 stops operating, the probe and guide rod are removed, and a tapered reamer 8 and a pipe puller 9 are installed at the end of the first drill pipe 5. A prefabricated pipe 10 is sleeved on the outside of the pipe puller 9.

[0072] S6. The clamping cylinder 22 keeps the connector 50 of the last drill rod 5 clamped. The push rod cylinder 1 is retracted and reset, pulling the multiple drill rods 5, the tapered reamer 8, the pipe puller 9 and the first precast pipe 10 connected to each other through the connector 50 into the hole and moving towards the working well 3. In this step, the tapered reamer 8 moves in front to expand the hole, and the precast pipe 10 is pushed into the hole with the enlarged inner diameter at the rear end of the tapered reamer 8.

[0073] S7. After the first precast pipe 10 is fully inserted into the hole, the remaining precast pipes 10 are pushed into the hole by the pipe jacking cylinder 71, and the drill rods 5 are removed one by one in the working well 3 until the hole expanded by the conical expander 8 is completely filled with precast pipes 10, and the process is completed.

[0074] This application places the jacking cylinder 1, used for jacking in and pulling out the drill rod 5, on the ground, which requires less site area, makes it easy to enter and leave the site, facilitates pipe pulling, and removes restrictions on drilling construction, thereby reducing construction costs, expanding the scope of application, and greatly improving construction efficiency. It is especially suitable for pipeline construction projects with limited construction space, pipeline length > 400m, and high requirements for pipeline accuracy.

[0075] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A split-type jacking device for long-distance pipeline construction, characterized in that, The device includes a hydraulic jacking mechanism and a connecting mechanism. The hydraulic jacking mechanism includes a jacking cylinder (1) and a pusher plate (2). The jacking cylinder (1) is located on the ground, and the pusher plate (2) is located inside the working well (3). The connecting mechanism includes a frame (4). The pusher plate (2) is located at the lower part of the frame (4). The jacking cylinder (1) pushes the upper part of the frame (4), and the pusher plate (2) pushes or pulls out the drill rod (5) into or out of the inner wall of the working well (3). The frame (4) is U-shaped. The side wall of the push plate (2) is fixedly connected to the lower part of the frame (4). A pair of slide rails (31) are mounted at the wellhead of the working well (3). A pair of sliders (40) are symmetrically mounted on the outer wall of the frame (4). The frame (4) is mounted on the slide rails (31) via the sliders (40) and slides on the slide rails (31). The pair of push rod cylinders (1) push and pull the two vertical ends of the frame (4) respectively and simultaneously.

2. The split-type jacking device for long-distance pipeline construction according to claim 1, characterized in that, Two support plates (32) are provided between a pair of slide rails (31), and the two support plates (32) are respectively and one-to-one in contact with a pair of inner walls of the working well (3); A pair of first slide rods (33) are provided between the two support plates (32). The pair of first slide rods (33) pass through the two vertical ends of the frame (4) respectively and in a one-to-one correspondence. The connection between the first slide rod (33) and the frame (4) is located at the lower part of the frame (4).

3. The split-type jacking device for long-distance pipeline construction according to claim 1, characterized in that, The pair of slide rails (31) are located above the wellhead of the working well (3) and close to the inner wall of the working well (3).

4. The split-type jacking device for long-distance pipeline construction according to claim 2, characterized in that, A pair of support seats (6) are provided on the ground. The pair of support seats (6) are located on both sides of the working well (3). A pair of second slide rods (60) are passed between the pair of support seats (6). The pair of second slide rods (60) pass through the two vertical ends of the frame (4) respectively and in a one-to-one correspondence. The connection between the second slide rod (60) and the frame (4) is located at the upper part of the frame (4). The top rod cylinder (1) pushes the frame (4) to slide on the first slide rod (33), the second slide rod (60) and the slide rail (31).

5. The split-type jacking device for long-distance pipeline construction according to claim 4, characterized in that, The drill rod (5) is provided with a connector (50) at one end near the pusher plate (2). The connector (50) is H-shaped, and two adjacent drill rods (5) are respectively sleeved on both ends of the connector (50). The push plate (2) has a through hole (21) in the middle, and the drill rod (5) passes through the through hole (21). The push plate (2) has several clamping cylinders (22) on the side facing the drill rod (5). The push rods of the several clamping cylinders (22) all point to the axis of the through hole (21) and are all locked in the groove (500) of the connector (50).

6. The split-type jacking device for long-distance pipeline construction according to claim 5, characterized in that, The drill rod (5) and the connector (50) are either interference fit or connected by threads.

7. The split-type jacking device for long-distance pipeline construction according to any one of claims 1-6, characterized in that, A receiving well (7) is also provided on the ground. A pipe jacking cylinder (71) is provided in the receiving well (7). The pipe jacking cylinder (71) pushes the precast pipe (10) into the working well (3).

8. The split-type jacking device for long-distance pipeline construction according to claim 7, characterized in that, A back plate (72) is provided between the jacking cylinder (71) and the inner wall of the receiving well (7). The jacking cylinder (71) is in contact with the back plate (72), and the lower part of the back plate (72) is located below the bottom of the receiving well (7).

9. A construction method for a split-type jacking device used in long-distance pipeline construction, characterized in that, Includes the following steps: S1. Excavate a working well (3) and a receiving well (7) on the ground, and place a slide rail (31) at the wellhead of the working well (3), place a second slide rod (60) above the wellhead of the working well (3), and place a first slide rod (33) below the wellhead of the working well (3). S2. Assemble the frame (4) and tighten the push rod of the push rod cylinder (1) with the frame (4) using bolts; S3. Install a probe and guide rod at one end of the first drill rod (5) and a connector (50) at the other end. Insert the other end of the first drill rod (5) into the through hole (21) of the push plate (2) and insert the push rod of the clamping cylinder (22) into the groove (500) of the connector (50). S4. The top rod cylinder (1) is activated, pushing the frame (4) and the push plate (2) and pushing the first drill rod (5) into the soil layer. When the connector (50) of the first drill rod (5) is about to enter the soil layer, the top rod cylinder (1) stops. After the clamping cylinder (22) is reset, the top rod cylinder (1) is reset. Then, one end of the second drill rod (5) is inserted into the connector (50) of the first drill rod (5). At the same time, the connector (50) is installed on the other end of the second drill rod (5). After the clamping cylinder (22) clamps the connector (50) of the second drill rod (5), the top rod cylinder (1) is activated again. This process is repeated to form a small-diameter hole. S5. When the first drill pipe (5) is fully inserted into the receiving well (7), the top rod cylinder (1) stops operating, the probe and guide rod are removed, and a tapered reamer (8) and a pipe puller (9) are installed at the end of the first drill pipe (5). A prefabricated pipe (10) is fitted on the outside of the pipe puller (9). S6. The top rod cylinder (1) is reset, pulling all drill rods (5), tapered reamer (8), pipe puller (9) and the first precast pipe (10) into the hole and moving towards the working well (3); S7. After the first precast pipe (10) is fully inserted into the hole, the remaining precast pipes (10) are pushed into the hole by the jacking cylinder (71), and the drill rods (5) are removed in sequence in the working well (3) until the hole expanded by the conical expander (8) is completely filled with precast pipes (10), and the process is completed.

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