Ultra-long distance guide drill pipeline laying device and method based on high-frequency vibration resistance reduction

Abstract

The invention discloses an ultra-long-distance guide drill pipeline laying device and method based on high-frequency vibration resistance reduction, and the device comprises high-frequency vibration parts which are located in a guide hole channel, the number of the high-frequency vibration parts is consistent with the number of preset cable protection steel pipes, the high-frequency vibration parts are in one-to-one correspondence with the preset cable protection steel pipes, and the multiple high-frequency vibration parts are connected with a recovery cable. The high-frequency vibration piece is connected with a control system and used for controlling vibration starting, stopping, frequency adjusting and the contact state with the inner wall of the cable protection steel pipe of the high-frequency vibration piece, and meanwhile vibration fluctuation energy of the high-frequency vibration piece can be diffused to soil around the cable protection steel pipe. And a vibration liquefaction area and a dynamic gap area are generated on the soil body around the cable protection steel pipe. According to the method, the steel pipe-soil body interface state and the soil body local structure are adjusted through vibration, the laying stability is ensured, and meanwhile the friction resistance load in the pushing or pulling-back process of the cable protection steel pipe can be effectively reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of trenchless laying of submarine cables, and in particular to a long-distance guided drilling pipeline laying device and method based on high-frequency vibration drag reduction. BACKGROUND

[0002] With the rapid development of marine engineering, cross-sea power transmission and island infrastructure construction, the demand for trenchless laying technology of long-distance submarine cables is increasing. Guided drilling, as a trenchless laying technology suitable for complex geology and sensitive ecological environment, is widely used in submarine cable crossing projects such as beaches, shallow seas, port areas and wetlands. In long-distance submarine cable laying projects using guided drilling construction, the cable is usually wrapped in a protective steel pipe, and the pipe is pushed or pulled through the formed guide hole to complete the initial laying. However, during the long-distance laying process, there is significant contact friction and soil resistance between the steel pipe and the hole wall, especially in the areas where the backfill is not dense or the ground deformation is large, the frictional resistance will increase nonlinearly with the laying distance, causing the driving force required for pushing or pulling to rise rapidly. This not only increases the load requirements for the pushing equipment, but also easily causes local damage, deformation or even blockage of the steel pipe, seriously affecting the construction efficiency and engineering quality. Therefore, an effective drag reduction technology is needed to reduce the frictional resistance during the pushing or pulling process while ensuring the stability of the laying. SUMMARY

[0003] To overcome the above shortcomings, the present application provides a long-distance guided drilling pipeline laying device and method based on high-frequency vibration drag reduction, which can adjust the steel pipe-soil interface state and local soil structure through vibration, effectively reducing the frictional resistance during the pushing or pulling process of the cable protection steel pipe while ensuring the stability of the laying.

[0004] The specific technical solutions are as follows: A long-distance guided drilling pipeline laying device based on high-frequency vibration drag reduction, comprising a high-frequency vibration member, in the initial state of the high-frequency vibration member, the two ends of the high-frequency vibration member are tightly attached to the inner wall of the cable protection steel pipe, the high-frequency vibration member is located in the guide hole, the number of the high-frequency vibration members is consistent with and corresponds to the number of the preset cable protection steel pipes, and a plurality of the high-frequency vibration members are connected with a recovery cable, the high-frequency vibration member is connected with a control system for controlling the vibration start, stop, frequency adjustment and contact state with the inner wall of the cable protection steel pipe of the high-frequency vibration member, the cable protection steel pipe advances along the preset guide hole under the propulsion of the high-frequency vibration member, and at the same time, the vibration fluctuation energy of the high-frequency vibration member is diffused to the surrounding soil of the cable protection steel pipe, so that the surrounding soil of the cable protection steel pipe generates a vibration liquefaction zone and a dynamic void zone.

[0005] Preferably, the high-frequency vibration member comprises a double-piston hydraulic rod, the outer side of the double-piston hydraulic rod is connected with a high-frequency vibrator, the double-piston hydraulic rod has two symmetrically arranged piston rods, the end of the piston rod is connected with a pressing plate, and the piston rod is controlled to extend and retract by a control system, so that the pressing plate is in contact with and loosened from the inner wall of the cable protection steel pipe.

[0006] Preferably, the pressing plate is in an arc structure matching the curvature of the inner wall of the cable protection steel pipe.

[0007] Preferably, the outer side of the pressing plate is provided with a flexible rubber pad.

[0008] Preferably, the high-frequency vibrator is a centrifugal high-frequency vibrator.

[0009] Preferably, the high-frequency vibrator is fixed on the oil cylinder of the double-piston hydraulic rod by a hoop structure.

[0010] Preferably, the oil cylinder of the double-piston hydraulic rod is provided with a rope hole structure for connecting the recovery cable.

[0011] Preferably, there are at least two high-frequency vibrators, which are uniformly distributed on the outer side of the oil cylinder of the double-piston hydraulic rod in the circumferential direction, and the vibration frequency and amplitude of the high-frequency vibrators are adjusted according to the size, stiffness characteristics of the cable protection steel pipe and the soil type of the stratum to be crossed, so as to excite and control different soil dynamic response mechanisms.

[0012] The application also discloses a long-distance guide drilling pipe laying method based on high-frequency vibration drag reduction. S1, install the high-frequency vibration member in the first cable protection steel pipe on the land side, ensure that the two ends of the high-frequency vibration member are tightly attached to the inner wall of the cable protection steel pipe, start the high-frequency vibration member through a control system, and make the high-frequency vibration member push the first cable protection steel pipe along the preset guide hole, so that the vibration fluctuation energy of the high-frequency vibration member is diffused to the soil around the cable protection steel pipe, the soil around the cable protection steel pipe generates a vibration liquefaction zone and a dynamic void zone, and the pushing resistance of the cable protection steel pipe is reduced. S2, when the first cable protection steel pipe is pushed to the preset position, weld and connect the next cable protection steel pipe with the first cable protection steel pipe, install the corresponding high-frequency vibration member in the next cable protection steel pipe, and connect the high-frequency vibration member with the high-frequency vibration member in the first cable protection steel pipe through the recovery cable; start the high-frequency vibration member to vibrate and push the cable protection steel pipe to continue advancing along the preset guide hole; S3, repeat step S2 to sequentially push each cable protection steel pipe until all the cable protection steel pipes are successfully laid in place along the preset path, and the whole crossing is completed. S4, after the laying of the cable protection steel pipe is completed, the high frequency vibration part is retracted through the control system, and then the two ends of the high frequency vibration part are separated from the contact state with the inner wall of the cable protection steel pipe, and then the high frequency vibration parts are pulled out from the cable protection steel pipe in sequence through the recovery cable, and the laying of the cable protection steel pipe is completed.

[0013] Preferably, in step S1, for the operation of pulling back the cable protection steel pipe in the coastal-sea or coastal-island working condition, the high frequency vibration part is installed in the first section of the cable protection steel pipe to be pulled back, and then the pulling back operation is performed.

[0014] Compared with the prior art, the beneficial effects of the present application are: 1. The present application drives the device to continuously act on the steel pipe to produce radial high frequency and small amplitude vibration during the pushing or pulling back construction process, which promotes the continuous micro-slip at the interface between the steel pipe and the soil, changes the friction property from static friction to dynamic friction, and significantly reduces the friction resistance during the starting and continuous pushing process. By organically integrating the drag reduction measures with the pushing process, the pushing resistance is significantly reduced, the construction efficiency is improved, and the application is suitable for long distance, large friction resistance non-excavation guided drilling crossing engineering.

[0015] 2. The present application has the advantages of simple structure, convenient operation, high vibration transmission efficiency, and can effectively reduce the friction resistance between the steel pipe and the soil in complex working conditions, and improve the laying efficiency and safety.

[0016] 3. The present application is designed by the recovery structure, so that the device can be recovered and reused after the steel pipe is laid, which reduces the construction cost and improves the resource utilization rate, and takes into account the economy and environmental protection. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiment description. In all the drawings, similar elements or parts are generally identified by similar reference signs. In the drawings, each element or part is not necessarily drawn according to the actual proportion.

[0018] Figure 1 The schematic diagram for the cable protection steel pipe being pushed into from the land side in the coastal-sea or coastal-island working condition.

[0019] Figure 2 The schematic diagram for the cable protection steel pipe being pulled into from the sea side or island side in the coastal-sea or coastal-island working condition.

[0020] Figure 3 The structural schematic diagram of the long distance guided drilling pipe laying device of the present application.

[0021] Figure 4The schematic diagram of the high frequency vibrating part of the present application in contact with the cable protection steel pipe.

[0022] Figure 5 The schematic diagram of the frictional property in the present application changing from static friction to dynamic friction.

[0023] Figure 6 The schematic diagram of the structure of the high frequency vibrating part of the present application.

[0024] Figure 7 The front view of the high frequency vibrating part of the present application.

[0025] Figure 8 The side view of the high frequency vibrating part of the present application.

[0026] Figure 9 The schematic diagram of step S1 of the long distance guided drilling pipeline laying method of the present application.

[0027] Figure 10 The schematic diagram of the vibration liquefaction zone of the surrounding soil caused by the high frequency vibration in the present application.

[0028] Figure 11 The schematic diagram of the dynamic void zone of the surrounding soil caused by the high frequency vibration in the present application.

[0029] Figure 12 The schematic diagram of step S2 of the long distance guided drilling pipeline laying method of the present application.

[0030] Figure 13 The schematic diagram of step S3 of the long distance guided drilling pipeline laying method of the present application.

[0031] Figure 14 The schematic diagram of step S4 of the long distance guided drilling pipeline laying method of the present application.

[0032] Guided hole 1, cable protection steel pipe 2, recovery cable 3, high frequency vibrating part 4, double piston hydraulic rod 401, high frequency vibrator 402, pressing plate 403, flexible rubber pad 404, hoop structure 405, rope hole structure 406, jacking point 5, ejecting point 6, vibration liquefaction zone 7, dynamic void zone 8. DETAILED DESCRIPTION

[0033] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0034] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0035] In the description of the present application, the meaning of several is one or more, the meaning of multiple is more than two, greater than, less than, more than, etc. are understood as not including the number, above, below, within, etc. are understood as including the number. If the terms "first", "second", "third" are described, they are only for the purpose of description and distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features or the sequence of indicated technical features.

[0036] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integral connection; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through intermediate medium; it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances. In addition, the technical features involved in different embodiments of the present application described below can be combined with each other as long as they do not conflict with each other.

[0037] Example 1: As Figures 1-2 shown, in the ultra-long distance submarine cable laying project in the case of coast-sea or coast-island, the guided drilling trenchless technology is often used to cross the near-shore shallow stratum along the predetermined track from the land side to form a continuous guide hole 1, and the cable protection steel pipe 2 outside the cable is laid to the target position through the land side pushing or pulling back, to form the subsequent submarine cable through protection channel, referring to Figure 1 : the cable protection steel pipe is pushed from the land side to the sea side, and the push-in point 5 of the cable protection steel pipe is located on the land side, and the push-in point 5 is the drilling point of the guided drill; the push-out point 6 of the steel pipe is located on the sea side or the island side, which is the drilling point of the guided drill; referring to Figure 2: The cable protection steel pipe is pulled back from the sea side to the land side, the pulling-out point of the cable protection steel pipe is located at the land side and is the same as the top-in point 5, and the pulling-in point is located at the sea side and is the same as the top-out point 6; during the pushing or pulling back of the cable protection steel pipe 2, due to the long crossing path and complex stratum, there is significant contact friction and soil resistance between the steel pipe and the hole wall, especially the friction force at the interface between the steel pipe and the soil exists in the form of static friction at the starting stage of construction, so a larger starting resistance needs to be overcome to move the steel pipe, which seriously affects the construction efficiency and may cause deformation or damage of the steel pipe.

[0038] Therefore, an ultra-long distance guide pipe laying device based on high-frequency vibration resistance reduction is proposed, referring to Figures 1-5 : The device comprises high-frequency vibration pieces 4, a control system (not shown in the figure) and a recovery cable 3, each high-frequency vibration piece 4 is installed in a corresponding cable protection steel pipe 2, in the initial state of the high-frequency vibration piece 4, the two ends of the high-frequency vibration piece 4 are tightly attached to the inner wall of the cable protection steel pipe 2, the high-frequency vibration piece 4 is located in the guide hole 1, the number of high-frequency vibration pieces 4 is consistent with and corresponds to the number of preset cable protection steel pipes 2, the plurality of high-frequency vibration pieces 4 are connected to the recovery cable 3, all high-frequency vibration pieces 4 are connected in sequence through the recovery cable 3, the high-frequency vibration piece 4 is connected with the control system, the control system is respectively connected with the plurality of high-frequency vibration pieces 4 in communication, the vibration start, stop, frequency adjustment and contact state with the inner wall of the cable protection steel pipe 2 of the high-frequency vibration piece 4 are controlled through the control system; the cable protection steel pipe 2 advances along the preset guide hole 1 under the propulsion of the high-frequency vibration piece 4, at the same time, the vibration fluctuation energy of the high-frequency vibration piece 4 is diffused to the surrounding soil of the cable protection steel pipe 2, so that the surrounding soil of the cable protection steel pipe 2 generates a vibration liquefaction zone 7 and a dynamic gap zone 8. Through the high-frequency vibration piece 4, the driving device continuously acts during the pushing or pulling back construction process of the cable protection steel pipe 2, so that the cable protection steel pipe 2 generates radial high-frequency and small-amplitude vibration, which promotes continuous micro-slippage at the interface between the cable protection steel pipe 2 and the soil, changes the friction property from static friction to dynamic friction, and thus significantly reduces the friction resistance during the starting and continuous propulsion process. Preferably, the control system is a hydraulic control system.

[0039] As Figures 6-8As shown, the high-frequency vibration piece 4 includes a double-piston hydraulic rod 401, a high-frequency vibrator 402, and a pressing plate 403. The double-piston hydraulic rod 401 has two piston rods, and the end of each piston rod is connected with a pressing plate 403. The piston rod is controlled to extend and retract by a control system, so as to realize the contact and loosening of the pressing plate 403 with the inner wall of the cable protection steel pipe 2. When the piston rod extends, the pressing plate 403 can be pressed against the inner wall of the cable protection steel pipe 2, so as to realize the stable support of the device and the effective transmission of vibration energy. When the piston rod retracts, the pressing plate 403 loosens the contact with the inner wall of the cable protection steel pipe 2, so as to facilitate the recovery of the device. The high-frequency vibrator 402 is at least two and is uniformly distributed on the outer side of the oil cylinder of the double-piston hydraulic rod 401 in the circumferential direction. According to the size, stiffness characteristics of the cable protection steel pipe 2 and the soil type (such as sandy soil, silt, clay or saturated soft soil) of the stratum to be crossed, the vibration frequency and amplitude of the high-frequency vibrator 402 are adjusted, so as to realize the excitation and control of different soil dynamic response mechanisms and guarantee the continuity and controllability of the vibration drag reduction process. For example, for high-plasticity clay, lower frequency and larger energy vibration can be used to induce structural loosening and plastic deformation; and for sand layer, higher frequency vibration can be used to excite particle rearrangement and contact stress release.

[0040] The pressing plate 403 is an arc-shaped structure that matches the curvature of the inner wall of the cable protection steel pipe 2, and a flexible rubber pad layer 404 is arranged on the outer side of the pressing plate 403. The high-frequency vibrator 402 is a centrifugal high-frequency vibrator 402, which is fixed on the oil cylinder of the double-piston hydraulic rod 401 through a hoop structure 405. The oil cylinder of the double-piston hydraulic rod 401 is provided with a rope hole structure 406 for connecting the recovery cable 3.

[0041] Embodiment 2 The embodiment provides a long-distance guide drilling pipeline laying method based on high-frequency vibration drag reduction, which is realized based on the long-distance guide drilling pipeline laying device based on high-frequency vibration drag reduction in embodiment 1. The method comprises the following steps. S1, the high-frequency vibration piece 4 is installed in the inside of the first section cable protection steel pipe 2 on the land side, so as to ensure that the two ends of the high-frequency vibration piece 4 are closely attached to the inner wall of the cable protection steel pipe 2. After the high-frequency vibration piece 4 is started to generate high-frequency and small-amplitude vibration through the control system, the first section cable protection steel pipe 2 is pushed forward along the preset guide hole 1, as shown in Figure 9 For the operation of the cable protection steel pipe 2 in the retraction mode in the coastal-sea or coastal-island working condition, the high-frequency vibration piece 4 is installed in the inside of the first section cable protection steel pipe 2 to be retracted, and then the retraction operation is performed. During the steel pipe pushing or retraction operation, the pressing plates 403 at the two ends of the high-frequency vibration piece 4 are kept in close contact with the inner wall of the steel pipe, so as to ensure the efficient transmission of vibration energy.

[0042] As Figures 10-11As shown, the contact interface between the steel pipe and the soil is subjected to high-frequency vibration, and the vibration wave energy spreads to the surrounding soil, causing particle rearrangement and loosening. In particular, in saturated or fine-grained soil layers, local vibration liquefaction is easily induced, i.e., the shear strength of the soil temporarily decreases, showing fluidity, thereby reducing the lateral constraint and frictional effect of the steel pipe. In addition, considering that the stiffness of the cable-protected steel pipe 2 is much greater than that of the soil, the cable-protected steel pipe 2 can maintain its overall shape during vibration, while the soil yields and produces irreversible plastic deformation, resulting in a dynamic void zone 8 around the cable-protected steel pipe 2. This void further weakens the contact pressure and friction between the steel pipe and the soil, thereby significantly reducing the pushing resistance on a macro scale. The mechanism of the present embodiment, which causes the surrounding soil to produce a vibration liquefaction zone 7 and a dynamic void zone 8 through high-frequency vibration of the cable-protected steel pipe 2, not only enhances the adaptability of the steel pipe to complex strata, but also reduces the risk of pipe jamming and sudden increase in thrust force caused by geological unevenness, thereby improving the stability and safety of the overall construction process.

[0043] S2, when the first cable-protected steel pipe 2 is pushed to the preset position, the next cable-protected steel pipe 2 is welded and connected to the first cable-protected steel pipe 2, and the corresponding high-frequency vibrator 4 is installed inside the next cable-protected steel pipe 2, as shown in Figure 3 and Figure 9 : and the high-frequency vibrator 4 is connected in series with the high-frequency vibrator 4 inside the first cable-protected steel pipe 2 through the recovery cable 3; start the high-frequency vibrator 4 to vibrate and push the cable-protected steel pipe 2 to continue advancing along the preset guide hole 1, as shown in Figure 12 ; through the process cycle of "welding - installation - vibration - pushing (or back dragging)", the cable-protected steel pipe 2 is pushed; S3, repeat step S2, sequentially push each cable-protected steel pipe 2, until all cable-protected steel pipes 2 are successfully laid in place along the preset path, completing the overall crossing, as shown in Figure 13 ; S4, after the completion of the laying of all cable-protected steel pipes 2, the high-frequency vibrator 4 is controlled to retract by the control system, and then the two ends of the high-frequency vibrator 4 are separated from the contact state with the inner wall of the cable-protected steel pipe 2, and the fixed state is released, and then the high-frequency vibrator 4 is pulled out from the cable-protected steel pipe 2 in sequence by the recovery cable 3, completing the laying of the cable-protected steel pipe 2, as shown in Figure 14 . The recovery cable 3 realizes fast and convenient device recovery and multiple reuse, taking into account economy and environmental protection.

[0044] The above is only a specific embodiment of the present application, but the protection scope of the present application is not limited thereto, and any person skilled in the art can easily think of changes or replacements within the technical scope disclosed by the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A long-distance directional drilling pipeline laying device based on high-frequency vibration drag reduction, characterized in that, The system includes a high-frequency vibrating element (4). In the initial state of the high-frequency vibrating element (4), both ends of the high-frequency vibrating element (4) are tightly fitted to the inner wall of the cable protection steel pipe (2). The high-frequency vibrating element (4) is located in the guide channel (1). The number of the high-frequency vibrating elements (4) is consistent with the number of the preset cable protection steel pipes (2) and corresponds one-to-one. Multiple high-frequency vibrating elements (4) are connected to a recovery cable (3). The high-frequency vibrating element (4) is connected to a control system for controlling the vibration start, stop, frequency adjustment and contact state with the inner wall of the cable protection steel pipe (2). The cable protection steel pipe (2) moves forward along the preset guide channel (1) under the propulsion of the high-frequency vibrating element (4). At the same time, the vibration wave energy of the high-frequency vibrating element (4) diffuses to the surrounding soil of the cable protection steel pipe (2), causing the surrounding soil of the cable protection steel pipe (2) to generate a vibration liquefaction zone (7) and a dynamic void zone (8).

2. The ultra-long distance directional drilling pipeline laying device based on high-frequency vibration drag reduction according to claim 1, characterized in that, The high-frequency vibrating component (4) includes a double-piston hydraulic rod (401), and a high-frequency vibrator (402) is connected to the outside of the double-piston hydraulic rod (401). The double-piston hydraulic rod (401) has two symmetrically arranged piston rods, and a pressure plate (403) is connected to the end of the piston rod. The piston rods are extended and retracted by the control system, thereby realizing the contact and release between the pressure plate (403) and the inner wall of the cable protection steel pipe (2).

3. The ultra-long distance directional drilling pipeline laying device based on high-frequency vibration drag reduction according to claim 2, characterized in that, The pressure plate (403) is an arc-shaped structure that conforms to the curvature of the inner wall of the cable protection steel pipe (2).

4. The ultra-long distance directional drilling pipeline laying device based on high-frequency vibration drag reduction according to claim 3, characterized in that, A flexible rubber pad (404) is provided on the outer side of the pressure plate (403).

5. The ultra-long distance directional drilling pipeline laying device based on high-frequency vibration drag reduction according to claim 2, characterized in that, The high-frequency vibrator (402) is a centrifugal high-frequency vibrator.

6. The ultra-long distance directional drilling pipeline laying device based on high-frequency vibration drag reduction according to claim 5, characterized in that, The high-frequency vibrator (402) is fixed to the cylinder of the double-piston hydraulic rod (401) by a clamp structure.

7. The ultra-long distance directional drilling pipeline laying device based on high-frequency vibration drag reduction according to claim 2, characterized in that, The cylinder of the dual-piston hydraulic rod (401) is provided with a rope hole structure for connecting the recovery cable (3).

8. The ultra-long distance directional drilling pipeline laying device based on high-frequency vibration drag reduction according to claim 5, characterized in that, There are at least two high-frequency vibrators (402), which are evenly distributed around the cylinder of the double piston hydraulic rod (401). The vibration frequency and amplitude of the high-frequency vibrators (402) are adjusted according to the size and stiffness characteristics of the cable protection steel pipe (2) and the soil type of the stratum it passes through, so as to realize the excitation and control of different soil dynamic response mechanisms.

9. A method for laying ultra-long-distance directional drilling pipelines based on high-frequency vibration drag reduction, comprising the ultra-long-distance directional drilling pipeline laying device based on high-frequency vibration drag reduction as described in any one of claims 1 to 8, characterized in that, It also includes the following steps: S1: On the land side, the high-frequency vibrator (4) is pre-installed inside the first section of the cable protection steel pipe (2) to ensure that the two ends of the high-frequency vibrator (4) are tightly attached to the inner wall of the cable protection steel pipe (2); the high-frequency vibrator (4) is started by the control system, so that it pushes the first section of the cable protection steel pipe (2) forward along the preset guide channel (1). The vibration wave energy of the high-frequency vibrator (4) is diffused to the surrounding soil of the cable protection steel pipe (2), so that the surrounding soil of the cable protection steel pipe (2) generates a vibration liquefaction zone (7) and a dynamic void zone (8), thereby reducing the pushing resistance of the cable protection steel pipe (2); S2: After the first section of cable protection steel pipe (2) is advanced to the preset position, the next section of cable protection steel pipe (2) is welded to the first section of cable protection steel pipe (2). At the same time, a corresponding high-frequency vibrator (4) is installed inside the next section of cable protection steel pipe (2), and the high-frequency vibrator is connected in series with the high-frequency vibrator (4) inside the first section of cable protection steel pipe (2) through a recovery cable (3). The high-frequency vibrator (4) is started to vibrate and push the cable protection steel pipe (2) to continue to advance along the preset guide channel (1). S3: Repeat step S2 to advance each section of cable protection steel pipe (2) in sequence until all cable protection steel pipes (2) are successfully laid in place according to the preset path, and the overall crossing is completed; S4: After all the cable protection steel pipes (2) are laid, the high-frequency vibrating element (4) is controlled to contract by the control system, so that the two ends of the high-frequency vibrating element (4) are separated from the inner wall of the cable protection steel pipe (2). Then, the high-frequency vibrating element (4) is pulled out from the cable protection steel pipe (2) in sequence by the recovery cable (3) to complete the laying of the cable protection steel pipe (2).

10. The method for laying ultra-long-distance directional drilling pipelines based on high-frequency vibration drag reduction according to claim 9, characterized in that, In step S1, for the operation of pulling back the cable protection steel pipe (2) under the coastal-sea or coastal-island conditions, the high-frequency vibrating element (4) is installed inside the first section of the cable protection steel pipe (2) to be pulled back before the pullback operation is carried out.

Images