A deep buried pipeline protection device and construction method using high pressure water jet and steel cable

Abstract

The application discloses a deep-buried pipeline protection device using high-pressure water jet and steel cable, which comprises a supporting part and a steel cable mounting part; the supporting part comprises two pile foundations and a strip-shaped steel bearing platform fixed on the two pile foundations; the steel cable mounting part is composed of two same steel cable propulsion devices and a high-pressure water pump; the steel cable propulsion device is composed of a base and a high-pressure water jet steering module from top to bottom, and the base and the high-pressure water jet steering module are connected by a mechanical rotating machine; the high-pressure water jet steering module contains two groups of nozzle pressure-bearing hoses with different diameters which are located in hollow aluminum pipes, and the steel cable is located between the two hollow aluminum pipes. The application discloses a deep-buried pipeline protection device using high-pressure water jet and steel cable, which comprises a supporting part and a steel cable mounting part; the supporting part comprises two pile foundations and a strip-shaped steel bearing platform fixed on the two pile foundations; the steel cable mounting part is composed of two same steel cable propulsion devices and a high-pressure water pump; the steel cable propulsion device is composed of a base and a high-pressure water jet steering module from top to bottom, and the base and the high-pressure water jet steering module are connected by a mechanical rotating machine; the high-pressure water jet steering module contains two groups of nozzle pressure-bearing hoses with different diameters which are located in hollow aluminum pipes, and the steel cable is located between the two hollow aluminum pipes.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of underground space high-risk pipeline protection, in particular to an equipment for protecting deep buried pipeline by using high-pressure water jet, and further relates to a construction method of deep buried pipeline protection device by using high-pressure water jet and steel cable. BACKGROUND

[0002] In the 21st century, underground space develops rapidly, and the construction environment of underground space is increasingly complex. Shield and pipe jacking and other crossing underground high-risk pipelines are increasing. When shield and pipe jacking and other crossing underground high-risk pipelines, the soil settlement caused by tunneling and jacking will cause the local deflection of underground high-risk pipelines to increase, thereby causing local stress concentration, resulting in pipeline damage, pipeline fluid leakage, and disasters such as soil pollution and explosion.

[0003] When shield and pipe jacking and other crossing shallow buried underground high-risk pipelines, the open cut method is often used to excavate the upper layer of the pipeline and use a rope to hang the pipeline to provide support force to prevent the pipeline from producing local deflection and stress concentration. However, when the open cut method is used to excavate the upper layer of the pipeline, the pipeline may be broken and damaged due to the rough excavation method of excavators and shovels, thereby causing pipeline explosion, personnel injury, and other hazards, and the safety risk is large. When shield and pipe jacking and other cross deep buried underground high-risk pipelines, not only may the pipeline be broken and damaged, but also due to the large buried depth of the pipeline, the amount of earthwork to be excavated by the open cut method is too large, and the economy is poor. SUMMARY

[0004] To solve the above problems, the present application proposes a deep buried pipeline protection device and construction method by using high-pressure water jet and steel cable. The device uses high-pressure water jet nozzles of different diameters and magnetic steel cables to pass the steel cable from the ground around the underground high-risk pipeline back to the ground, thereby completing the protection construction of the deep buried pipeline. The construction method of the equipment for protecting deep buried pipeline by using high-pressure water jet eliminates the method of protecting underground high-risk pipelines by using the open cut method, increases the safety of construction, has little disturbance to the soil around the underground high-risk pipeline, and has high economy for deep buried underground high-risk pipelines without the need for a large amount of earthwork excavation, thereby solving the problem of protecting pipelines in the case of shield and pipe jacking and other crossing deep buried underground high-risk pipelines.

[0005] To achieve the above purpose, the technical solution adopted by the present application is as follows:

[0006] A kind of deep pipeline protection device using high-pressure water jet and cable, including support part and cable installation part;The support part includes two pile foundations and a strip-shaped steel bearing platform fixed on the two pile foundations;The cable installation part is made of two identical cable propulsion devices and a high-pressure water pump, the high-pressure water pump is connected with four pressure-bearing hoses, the cable propulsion device is from top to bottom by base and high-pressure water jet steering module, the base and the high-pressure water jet steering module are connected by mechanical rotating machine;The base and the high-pressure water jet steering module are penetrated by a pressure-bearing hose and a cable;The lower part of the cable is connected with a cylindrical magnet with the same diameter as the cable;

[0007] The outer side of the high-pressure water jet steering module is provided with steering nozzle one, and the inner side is provided with steering nozzle two, the aperture of steering nozzle one is smaller than the aperture of steering nozzle two;The steering nozzle one and the steering nozzle two are tangent to valve one;The valve one controls the high-pressure water flow in the pressure-bearing hose to the steering nozzle one and the steering nozzle two;The high-pressure water jet steering module bottom is connected with a vertical nozzle, and the vertical nozzle is connected with valve two;Valve two controls the high-pressure water flow in the pressure-bearing hose to the vertical nozzle.

[0008] Preferably, the part of the steel bearing platform between the two pile foundations is excavated with a small hole at a distance of 0.3 meters from the two pile foundations, and the diameter of the small hole is 1 millimeter larger than the diameter of the cable;

[0009] Preferably, the base is composed of two hollow aluminum tubes one with rectangular longitudinal section, two flat rib strips are welded on the two planes where the short edges of the longitudinal section of the hollow aluminum tube one are located, and the two hollow aluminum tubes one are connected by the two rib strips in front and back respectively;Four long edges of the lower end of the two hollow aluminum tubes one each extend outward by half an oval aluminum plate one, the thickness of the oval aluminum plate one is equal to the thickness of the hollow aluminum tube one, the long edge of the oval aluminum plate one coincides with the long edge of the longitudinal section of the hollow aluminum tube one, the ratio of the long edge to the short edge of the oval aluminum plate one is equal to 1.5, and a small hole is opened on the long edge of the oval aluminum plate one at a position 1 / 2 of the short edge length from the center.

[0010] Preferably, the high-pressure water jet flow diversion module is composed of two identical hollow aluminum tubes with rectangular longitudinal sections, two planes where the short edges of the longitudinal sections of the hollow aluminum tubes are welded with two ribs respectively, the thickness of the hollow aluminum tubes is equal to the thickness of the hollow aluminum tube one, the length of the long edges of the longitudinal sections of the hollow aluminum tubes is equal to the length of the long edges of the longitudinal sections of the hollow aluminum tube one, and the short edges are twice the thickness of the hollow aluminum tube one, four long edges of the upper ends of the two hollow aluminum tubes each extend outward by half an oval aluminum plate two, the size and hole position of the oval aluminum plate two are the same as those of the oval aluminum plate one, four holes are opened on the four planes where the short edges of the longitudinal sections of the two hollow aluminum tubes are located, smaller diversion nozzles one are arranged in the eight holes on the same plane, and larger diversion nozzles two are arranged in the eight holes on the other plane.

[0011] Preferably, a magnetic attraction fixing device is installed on the inner wall of the hollow aluminum tube two close to the side of the steel cable, the magnetic attraction fixing device can generate magnetism after being powered on, the steel cable penetrates between the two hollow aluminum tube ones and the two hollow aluminum tube twos, and the bottom of the steel cable is flush with the hollow aluminum tube two.

[0012] Preferably, the included angle between the jet direction of the diversion nozzle one and the rib is 60°, and the included angle between the vertical nozzle and the horizontal plane is 60°.

[0013] A construction method of a deep buried pipeline protection device using high-pressure water jet flow and a steel cable, comprising the following steps:

[0014] 1) Determining pipeline information: detecting the buried depth and horizontal position of the underground high-risk pipeline and marking, and finding data to determine the diameter of the underground high-risk pipeline;

[0015] 2) Setting up a foundation: setting up a pile foundation on both sides of the underground high-risk pipeline to be protected, the connecting line of the two pile foundations is perpendicular to the direction of the underground high-risk pipeline, the length of the two pile foundations exposed to the ground is 1 meter, and the horizontal distance between the steel bearing platform and the outer wall of the underground high-risk pipeline is greater than 0.5 meters;

[0016] 3) Erection of the bearing platform: fixing the steel bearing platform on the upper ends of the two pile foundations, the steel bearing platform is symmetrically arranged relative to the two pile foundations, and the overhanging distance of the steel bearing platform is 0.3 meters;

[0017] 4) Installation of the steel cable: opening the magnetic attraction fixing device to pass the magnet ends of the two steel cables through the bases on both sides and the inside of the high-pressure water jet flow diversion module, and adsorb to the bottom ends of the two steel cable propulsion devices;

[0018] 5) The distance mark of digging down: mark the position of the cable at the distance of the top of the base upward one length of the excavation depth, wherein the excavation depth = the buried depth of the underground high-risk pipeline + the diameter of the underground high-risk pipeline + 0.1 meters;

[0019] 6) Pre-excavation: manually excavate positioning hole one and positioning hole two right below the two small holes on the steel support platform, the sizes of the positioning hole one and the positioning hole two are the same as the size of the cable pushing device;

[0020] 7) Vertical excavation: put the two cable pushing devices into the positioning hole one and the positioning hole two, and place the steering nozzle two opposite to the underground high-risk pipeline; control valve one is closed, valve two is opened, and the high-pressure water pump is turned on, at this time the vertical nozzle starts to spray water jet, which drives the cable pushing device to dig down; at the same time, mud is injected into the positioning hole one and the positioning hole two to prevent the hole wall from collapsing; observe the position of the mark on the cable while the cable pushing device is digging down, and when the mark position reaches the positioning hole, turn off the high-pressure water pump and stop the vertical excavation;

[0021] 8) Steering excavation: control valve two is closed, valve one is opened, the high-pressure water pump is turned on, and the mechanical rotating machine is turned on at the same time, at this time the steering nozzle one and the steering nozzle two start to spray high-pressure water jet, because the aperture of the steering nozzle one is smaller than the aperture of the steering nozzle two, the two high-pressure water jet steering modules rotate around the respective mechanical rotating machines towards the side of the underground high-risk pipeline, and when the rotation angle of the mechanical rotating machine reaches the target value, the high-pressure water pump is turned off;

[0022] 9) Connecting cable: the two magnets at the lower end of the two cables are attracted together, the cable is slowly pulled upward from the positioning hole one until the two magnets are pulled out of the positioning hole one, and the two magnets are separated;

[0023] 10) Recovery equipment: operate the mechanical rotating machine in reverse rotation to turn the two high-pressure water jet steering modules back to the original position, pull the pressure hose upward, and pull the two cable pushing devices out of the cable;

[0024] 11) Fixing cable: insert the two ends of the cable into the two small holes of the steel support platform respectively, fix the cable in the small hole opposite to the positioning hole one with a wire clip, paste a strain gauge on the cable in the small hole opposite to the positioning hole two, and measure the strain of the strain gauge with a strain gauge, then continuously clamp the cable with a wire tightener until the strain suddenly increases, complete the clamping operation, and fix the cable with the same wire clip after clamping;

[0025] 12) Soil body post-processing: pour underwater concrete from the bottom of the positioning hole one and the positioning hole two upward to the hole mouth.

[0026] Preferably, the target value of the rotation angle in step 8 = arcsin (half of the distance between the centers of the positioning hole one and the positioning hole two / the length of the high-pressure water jet steering module).

[0027] Technical effects and advantages of the present application: the present application uses the vertical nozzle of the steel cable propulsion device to send the steel cable to the deep buried underground high-risk pipeline depth, uses the steering nozzle one, the steering nozzle two and the mechanical rotating machine of the steel cable propulsion device to realize the steel cable around the underground high-risk pipeline back to the ground, uses the line tightener and the wire clipper and the axial force meter to precisely fit the steel cable with the underground high-risk pipeline, realizes the protection of the deep buried underground high-risk pipeline, thereby saying goodbye to the way of protecting the underground high-risk pipeline by open excavation method, increases the construction safety, the disturbance to the soil around the underground high-risk pipeline is small, for the deep buried underground high-risk pipeline, without a large amount of excavation earthwork, high economic efficiency, solves the problem of protecting the pipeline under the condition of shield, pipe jacking and other crossing deep buried underground high-risk pipeline. BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1 is a longitudinal sectional view of the deep pipeline protection device using high-pressure water jet and steel cable in the embodiment of the present application;

[0029] Figure 2 is a left side sectional view of the steel cable propulsion device in the embodiment of the present application;

[0030] Figure 3 is a right side sectional view of the steel cable propulsion device in the embodiment of the present application;

[0031] Figure 4 is an enlarged longitudinal sectional view of the rotating machine in the embodiment of the present application;

[0032] Figure 5 is a cross-sectional view of the steering nozzle one and the steering nozzle two of the high-pressure water jet steering module in the embodiment of the present application;

[0033] Figure 6 is a bottom view of the high-pressure water jet steering module in the embodiment of the present application;

[0034] Figure 7 is a construction method flow chart of the deep pipeline protection device using high-pressure water jet and steel cable in the embodiment of the present application.

[0035] Figure: 1, support part; 2, cable installation part; 3, pile foundation; 4, steel pile cap; 5, cable propulsion device; 6, high-pressure water pump; 7, pressure-bearing hose; 8, base; 9, high-pressure water jet steering module; 10, mechanical rotating machine; 11, cable; 12, hollow aluminum pipe I; 13, rib; 14, oval aluminum plate I; 15, hollow aluminum pipe II; 16, oval aluminum plate II; 17, steering nozzle I; 18, steering nozzle II; 19, valve I; 20, vertical nozzle; 21, valve II; 22, magnet; 23, magnetic attraction fixing device; 24, underground high-risk pipeline; 25, positioning hole I; 26, positioning hole II; 27, wire clipper; 28, wire tightener. DETAILED DESCRIPTION

[0036] The specific embodiments of the present application will be further described below with reference to the accompanying drawings. It should be noted that the description of these embodiments is used to help understand the present application, but does not constitute a limitation on the present application. In addition, the technical features involved in the various embodiments of the present application described below can be combined with each other as long as they do not conflict with each other.

[0037] As shown in Figure 1 , a deep-buried pipeline protection device using high-pressure water jet and cable, comprising a support part 1 and a cable installation part 2; the support part 1 comprises two pile foundations 3 and a strip-shaped steel pile cap 4 fixed on the two pile foundations; the cable installation part 2 is composed of two identical cable propulsion devices 5 and a high-pressure water pump 6, the high-pressure water pump 6 is connected with four pressure-bearing hoses 7, the cable propulsion device 5 is composed of a base 8 and a high-pressure water jet steering module 9 from top to bottom, the base 8 and the high-pressure water jet steering module 9 are connected by a mechanical rotating machine 10; the inside of the base 8 and the high-pressure water jet steering module 9 is penetrated by one of the pressure-bearing hoses 7 and one of the cables 11. The part of the steel pile cap 4 between the two pile foundations 3 is excavated with a small hole 1mm larger in diameter than the cable 11 at a distance of 0.3m from the two pile foundations.

[0038] As shown in Figure 2 , Figure 3 , Figure 4 , Figure 6As shown, the base 8 is composed of two identical hollow aluminum tubes 12 with rectangular longitudinal section, two flat rib 13 are welded on the two planes where the short edges of the longitudinal section of the hollow aluminum tubes 12 are located, the two hollow aluminum tubes 12 are connected by the two rib 13 in front and back respectively; four long edges of the lower end of the two hollow aluminum tubes 12 each extend outward half of an oval aluminum plate 14, the thickness of the oval aluminum plate 14 is equal to the thickness of the hollow aluminum tubes 12, the short edge of the oval aluminum plate 14 coincides with the long edge of the longitudinal section of the hollow aluminum tubes 12, the ratio of the long edge to the short edge of the oval aluminum plate 14 is equal to 1.5, a small hole is opened on the long edge of the oval aluminum plate 14 at a position 1 / 2 of the short edge length from the center; the high-pressure water jet deflection module 9 is composed of two identical hollow aluminum tubes 15 with rectangular longitudinal section, two flat rib 13 are welded on the two planes where the short edges of the longitudinal section of the hollow aluminum tubes 15 are located, the thickness of the hollow aluminum tubes 15 is equal to the thickness of the hollow aluminum tubes 12; the long edge of the longitudinal section of the hollow aluminum tubes 15 is equal to the length of the long edge of the longitudinal section of the hollow aluminum tubes 12, the short edge is twice the thickness of the hollow aluminum tubes 12 larger than the short edge of the longitudinal section of the hollow aluminum tubes 12; four long edges of the upper end of the two hollow aluminum tubes 15 each extend upward half of an oval aluminum plate 16; the size and hole opening position of the oval aluminum plate 16 are the same as those of the oval aluminum plate 14; four holes are opened on the four planes where the short edges of the longitudinal section of the two hollow aluminum tubes 15 are located, eight smaller deflection nozzles 17 are arranged in the eight holes on the same plane, eight larger deflection nozzles 18 are arranged in the eight holes on the other plane; the deflection nozzles 17 and the deflection nozzles 18 are connected with a valve 19; the valve 19 controls the flow of high-pressure water in the pressure-bearing hose to the deflection nozzles 17 and the deflection nozzles 18; a vertical nozzle 20 is connected to the bottom of the hollow aluminum tubes 15, and a valve 21 is connected to the vertical nozzle; the valve 21 controls the flow of high-pressure water in the pressure-bearing hose 7 to the vertical nozzle 20. A cylindrical magnet 22 with the same diameter as the steel cable 11 is connected to the lower part of the steel cable 11; the steel cable 11 penetrates between the two hollow aluminum tubes 12 and the two hollow aluminum tubes 15; the bottom of the steel cable 11 is flush with the hollow aluminum tubes 15. A magnetic fixing device 23 is installed on the inner wall of the hollow aluminum tubes 15 near the steel cable side; the magnetic fixing device 23 can generate magnetism after being electrified.

[0039] Specifically, as Figure 2 、 Figure 3 、 Figure 5As shown, the angle between the jetting direction of the first and second deflection nozzles 17 and 18 and the rib 13 is 60°; the vertical nozzle 20 is inclined to the other hollow aluminum pipe 15, and the angle between the vertical nozzle 20 and the horizontal plane is 60°; the inclined arrangement can reduce the soil into the middle gap and avoid the soil from hindering the steel cable to reach the target depth.

[0040] As shown in the drawings, the present application also provides a construction method of a deep buried pipeline protection device using high-pressure water jet and a steel cable, which comprises the following steps: Figure 7 As shown in the drawings, the present application also provides a construction method of a deep buried pipeline protection device using high-pressure water jet and a steel cable, which comprises the following steps:

[0041] 1) Determining pipeline information: using the Sidi MX2 intelligent pipeline detector to detect the buried depth and horizontal position of the underground high-risk pipeline and marking, and searching for data to determine the diameter of the underground high-risk pipeline 24;

[0042] 2) Setting up a foundation: setting up a pile foundation 3 on each side of the underground high-risk pipeline 24 to be protected, and the connecting line of the two pile foundations 3 is perpendicular to the direction of the underground high-risk pipeline 24; the length of the two pile foundations 3 exposed to the ground is 1 meter; the horizontal distance between the steel bearing platform 4 and the outer wall of the underground high-risk pipeline 24 is greater than 0.5 meters;

[0043] 3) Erection of the bearing platform: fixing the steel bearing platform 4 on the upper end of the two pile foundations 3, the steel bearing platform 4 is symmetrically arranged relative to the two pile foundations 3, and the overhanging distance of the steel bearing platform 4 is 0.3 meters;

[0044] 4) Installation of the steel cable: opening the magnetic fixing device 23 to pass the magnet 22 end of the two steel cables 11 through the base 8 and the high-pressure water jet deflection module 9 inside, and adsorbing to the bottom end of the two steel cable propulsion devices 5;

[0045] 5) Marking the excavation distance: marking the position of the steel cable 11 at a distance of one excavation depth length from the top of the base 8 upwards, wherein the excavation depth = the buried depth of the underground high-risk pipeline 24 + the diameter of the underground high-risk pipeline 24 + 0.1 meters;

[0046] 6) Pre-excavation: manually excavating the positioning hole one 25 and the positioning hole two 26 under the small holes on the two steel bearing platforms 4, and the size of the positioning hole one 25 and the positioning hole two 26 is the same as the size of the steel cable propulsion device 5;

[0047] 7) Vertical excavation: Place the two cable propulsion devices 5 into positioning holes 1 25 and 26. When placing them, the side of the steering nozzle 2 18 should be directly facing the underground high-risk pipeline 24. Close control valve 1 19 and open valve 2 21. Turn on the high-pressure water pump 6. At this time, the vertical nozzle 20 will start spraying water jets, driving the cable propulsion device 5 to dig downwards. At the same time, inject mud into positioning holes 1 25 and 26 to prevent the hole walls from collapsing. While the cable propulsion device 5 is digging downwards, observe the marked position on the cable 11. When the marked position reaches the positioning hole opening, turn off the high-pressure water pump 6 and stop the vertical excavation.

[0048] 8) Turning excavation; control valve 21 is closed, valve 19 is opened, high-pressure water pump 6 is turned on, and mechanical rotary machine 10 is turned on at the same time. At this time, turning nozzle 17 and turning nozzle 28 start to spray high-pressure water jets. Since the orifice diameter of turning nozzle 17 is smaller than that of turning nozzle 28, the two high-pressure water jet turning modules 9 rotate around their respective mechanical rotary machines 10 toward the underground high-risk pipeline 24. When the rotation angle of mechanical rotary machine 10 reaches the target value, high-pressure water pump 6 is turned off.

[0049] 9) Connect the steel cables; close the magnetic fixing device 23, the magnets 22 at the lower ends of the two steel cables 11 attract each other, slowly pull the steel cables 11 upward from the positioning hole 25 until the two magnets 22 are pulled out of the positioning hole 25 and the two magnets 22 are separated.

[0050] 10) Recover the equipment; operate the mechanical rotator 10 to rotate in the opposite direction, turn the two high-pressure water jet deflector modules 9 back to their original positions, pull the pressure hose 7 upward, and pull the two steel cable propulsion devices 5 out of the steel cable 11;

[0051] 11) Fixing the steel cable: Insert both ends of the steel cable 11 into the two small holes of the steel bearing 4 respectively. Fix the steel cable 11 in the small hole directly above the positioning hole 25 with the wire clamp 27. Attach a strain gauge to the steel cable 11 in the small hole directly above the positioning hole 26 and measure its strain with the strain gauge. Use the wire tensioner 28 to continuously clamp the steel cable until the strain suddenly increases, thus completing the clamping operation. After clamping, fix it with the same wire clamp 27.

[0052] 12) Post-treatment of soil: In positioning holes one and two, underwater concrete is poured from the bottom of the hole upwards until the hole opening.

[0053] The target value of the rotation angle in step 8 is arcsin(half the distance between the centers of positioning hole 1 25 and positioning hole 26 / length of high-pressure water jet steering module 9).

[0054] Although the embodiments of the present application have been shown and described above, it is understood that the above-described embodiments are exemplary and are not to be construed as limiting the present application, and that variations, modifications, substitutions and changes can be made by those skilled in the art without departing from the scope of the present application.

Claims

1. A deep-buried pipeline protection device utilizing high-pressure water jet and steel cable, characterized in that: It includes a support section (1) and a cable installation section (2); the support section (1) includes two pile foundations (3) and a strip steel bearing platform (4) fixed on the two pile foundations; the cable installation section (2) consists of two identical cable propulsion devices (5) and a high-pressure water pump (6), the high-pressure water pump (6) is connected to four pressure-bearing hoses (7), the cable propulsion device (5) consists of a base (8) and a high-pressure water jet steering module (9) from top to bottom, the base (8) and the high-pressure water jet steering module (9) are connected by a mechanical rotating machine (10); the base (8) and the high-pressure water jet steering module (9) are penetrated by a pressure-bearing hose (7) and a steel cable (11); the lower part of the steel cable (11) is connected to a cylindrical magnet (22) with the same diameter as the steel cable (11). The high-pressure water jet steering module (9) has a steering nozzle 1 (17) on its outer side and a steering nozzle 2 (18) on its inner side. The orifice diameter of the steering nozzle 1 (17) is smaller than that of the steering nozzle 2 (18). The steering nozzle 1 (17) and the steering nozzle 2 (18) are connected to a valve 1 (19). The valve 1 (19) controls the flow of high-pressure water in the pressure-bearing hose to the steering nozzle 1 (17) and the steering nozzle 2 (18). The high-pressure water jet steering module (9) has a vertical nozzle (20) connected to its bottom. The vertical nozzle (20) is connected to a valve 2 (21). The valve 2 (21) controls the flow of high-pressure water in the pressure-bearing hose (7) to the vertical nozzle (20). The base (8) is composed of two identical hollow aluminum tubes (12) with rectangular longitudinal sections. Two flat ribs (13) are welded to the two planes on the short side of the longitudinal section of the hollow aluminum tube (12). The two hollow aluminum tubes (12) are connected by two ribs (13) at the front and back respectively. The four long sides at the lower end of the two hollow aluminum tubes (12) each extend downwards by half an elliptical aluminum plate (14). The thickness of the elliptical aluminum plate (14) is equal to the thickness of the hollow aluminum tube (12). The short side of the elliptical aluminum plate (14) coincides with the long side of the longitudinal section of the hollow aluminum tube (12). The ratio of the long side to the short side of the elliptical aluminum plate (14) is equal to 1.

5. A small hole is opened on the long side of the elliptical aluminum plate (14) at a distance of 1 / 2 the length of the short side from the center. The high-pressure water jet steering module (9) consists of two identical hollow aluminum tubes (15) with rectangular longitudinal sections. Two ribs (13) are welded to the two planes containing the short sides of the longitudinal sections of the hollow aluminum tubes (15). The thickness of the hollow aluminum tubes (15) is equal to the thickness of the hollow aluminum tubes (12). The long side of the longitudinal section of the hollow aluminum tubes (15) is equal to the long side of the longitudinal section of the hollow aluminum tubes (12), and the short side is twice the length of the short side of the longitudinal section of the hollow aluminum tubes (12). The thickness of the hollow aluminum tube one (12); the upper ends of the two hollow aluminum tubes two (15) each extend outwards by half an elliptical aluminum plate two (16); the size and opening position of the elliptical aluminum plate two (16) are the same as those of the elliptical aluminum plate one (14); four holes are opened on the four sides of the longitudinal section of the two hollow aluminum tubes two (15), and a smaller diameter steering nozzle one (17) is set in the eight holes on the same side, and a larger diameter steering nozzle two (18) is set in the eight holes on the other side. A magnetic fixing device (23) is installed on the inner wall of the hollow aluminum tube 2 (15) near the steel cable side; the magnetic fixing device (23) can generate magnetism after being energized, and the steel cable (11) passes through the middle of the two hollow aluminum tubes 1 (12) and the two hollow aluminum tubes 2 (15); the bottom of the steel cable (11) is flush with the hollow aluminum tube 2 (15).

2. The deep-buried pipeline protection device utilizing high-pressure water jet and steel cable according to claim 1, characterized in that: The portion of the steel pier (4) located between the two piles (3) has a small hole excavated at a distance of 0.3 meters from each of the two piles (3). The diameter of the small hole is 1 mm larger than the diameter of the steel cable (11).

3. The deep-buried pipeline protection device utilizing high-pressure water jet and steel cable according to claim 1, characterized in that: The spraying directions of the first (17) and the second (18) of the steering nozzle are both at an angle of 60° to the rib (13); the vertical nozzle (20) is inclined toward another hollow aluminum tube (15) at an angle of 60° to the horizontal plane.

4. The construction method of the deep-buried pipeline protection device utilizing high-pressure water jet and steel cable as described in any one of claims 1-3, characterized in that, Includes the following steps: 1) Determine pipeline information: Detect the burial depth and horizontal position of underground high-risk pipelines and mark them. At the same time, search for data to determine the diameter of underground high-risk pipelines (24); 2) Foundation setting: Set up one pile foundation (3) on each side of the underground high-risk pipeline (24) to be protected, and the line connecting the two pile foundations (3) is perpendicular to the direction of the underground high-risk pipeline (24); the length of the two pile foundations (3) exposed above the ground is 1 meter; the horizontal distance between the steel foundation (4) and the outer wall of the underground high-risk pipeline (24) is greater than 0.5 meters; 3) Erecting the pile cap: Fix a steel pile cap (4) on the upper end of the two pile foundations (3). The steel pile cap (4) is symmetrically arranged with respect to the two pile foundations (3), and the overhang distance of the steel pile cap (4) is 0.3 meters. 4) Install steel cables: Open the magnetic fixing device (23) and attach the magnet (22) ends of the two steel cables (11) to the bottom of the two steel cable propulsion devices (5) through the base (8) on both sides and the high-pressure water jet steering module (9) respectively. 5) Excavation distance marking: Mark the position of the steel cable (11) at the top of the base (8) with an excavation depth of one length above it, where the excavation depth = burial depth of the underground high-risk pipeline (24) + diameter of the underground high-risk pipeline (24) + 0.1 meters; 6) Pre-excavation: Positioning hole one (25) and positioning hole two (26) are manually excavated directly below the small holes on the two steel bearing platforms (4). The dimensions of positioning hole one (25) and positioning hole two (26) are the same as the dimensions of the steel cable propulsion device (5). 7) Vertical excavation: Place the two cable propulsion devices (5) into positioning hole one (25) and positioning hole two (26). When placing them, turn the second nozzle (18) directly towards the underground high-risk pipeline (24); close the first control valve (19) and open the second valve (21), turn on the high-pressure water pump (6), and at this time the vertical nozzle (20) starts to spray water jets, driving the cable propulsion device (5) to dig downwards; at the same time, inject mud into positioning hole one (25) and positioning hole two (26) to prevent the hole wall from collapsing; while the cable propulsion device (5) digs downwards, observe the marked position on the cable (11). When the marked position reaches the positioning hole opening, turn off the high-pressure water pump (6) and stop the vertical excavation; 8) Turning excavation; control valve two (21) closes, valve one (19) opens, turn on the high-pressure water pump (6), and at the same time turn on the mechanical rotary machine (10). At this time, the turning nozzle one (17) and the turning nozzle two (18) start to spray high-pressure water jets. Since the orifice of the turning nozzle one (17) is smaller than the orifice of the turning nozzle two (18), the two high-pressure water jet turning modules (9) rotate around their respective mechanical rotary machines (10) toward the underground high-risk pipeline (24). When the rotation angle of the mechanical rotary machine (10) reaches the target value, the high-pressure water pump (6) is turned off. 9) Connect the steel cables; close the magnetic fixing device (23), the magnets (22) at the lower ends of the two steel cables (11) attract each other, slowly pull the steel cables (11) upward from the positioning hole one (25) until the two magnets (22) are pulled out of the positioning hole one (25) and the two magnets (22) are separated; 10) Recover the equipment; operate the mechanical rotator (10) to rotate in the opposite direction, turn the two high-pressure water jet steering modules (9) back to their original positions, pull the pressure hose (7) upward, and pull the two steel cable propulsion devices (5) out of the steel cable (11); 11) Fixing the steel cable: Insert the two ends of the steel cable (11) into the two small holes of the steel base (4) respectively. Fix the steel cable (11) in the small hole directly above the first positioning hole (25) with a wire clamp (27). Attach a strain gauge to the steel cable (11) in the small hole directly above the second positioning hole (26) and measure its strain with a strain gauge. Use a wire tensioner (28) to continuously clamp the steel cable until the strain suddenly increases, and complete the clamping operation. After clamping, fix it with the same wire clamp (27). 12) Soil post-treatment: In positioning hole one (25) and positioning hole two (26), underwater concrete is poured from the bottom of the hole upwards until the hole opening.

5. The construction method of a deep-buried pipeline protection device utilizing high-pressure water jet and steel cable according to claim 4, characterized in that: The target value of the rotation angle in step 8 is = arcsin(half the distance between the centers of positioning hole one (25) and positioning hole two (26) / length of the high-pressure water jet steering module (9)).

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