Pipe jacking tunneling construction method

Abstract

The invention belongs to the technical field of underground engineering construction, and particularly relates to a pipe-jacking tunneling construction method, a spiral pipe-jacking system is adopted for construction, and the spiral pipe-jacking system comprises jacking equipment and hoisting equipment; the jacking equipment comprises a first crawler, a working platform arranged on the first crawler and a jacking unit arranged on the working platform, and the jacking unit is used for excavating a soil body and pushing a jacking pipe joint in. Jacking equipment of the spiral pipe jacking system adopted in the construction method is convenient and fast to transfer, the whole set of equipment is compact in structure, the labor intensity of workers is greatly reduced, and the construction method is suitable for construction of a transverse channel between two roadways.

Description

Technical Field

[0001] The invention belongs to the technical field of underground engineering construction, and particularly relates to a pipe jacking construction method. Background Art

[0002] A cross-coal tunnel is a short tunnel excavated horizontally within a coal tunnel (a tunnel excavated along a coal seam) to facilitate ventilation, pedestrian access, transportation, or construction. It typically connects to the main coal tunnel at right angles or at a certain angle, forming a "cross passage." Ventilation is paramount in coal mines. By strategically arranging cross-coals between these two tunnels, fresh air can enter the working face and remove harmful gases and methane from the mine, ensuring proper air circulation within the mine and the safety of personnel working on the face.

[0003] Currently, the main construction techniques used in coal tunnels in Hengchuan are cantilever tunneling and drilling. However, cantilever tunneling is complex in preparation and construction, produces high levels of dust, requires a large number of people, and is less economical. Drilling, on the other hand, suffers from smaller borehole diameters, requiring multiple drillings before installing extraction pipes. This results in a complex process, low efficiency, and high costs. Summary of the Invention

[0004] In view of this, the present invention provides a pipe jacking construction method using a spiral pipe jacking system, thereby solving or at least alleviating one or more of the above-mentioned problems and other problems existing in the prior art.

[0005] In order to achieve the above object, the technical solution adopted by the present invention is: A pipe jacking construction method, wherein the construction method adopts a spiral pipe jacking system for construction, and the spiral pipe jacking system includes a jacking device and a hoisting device; The jacking equipment includes: First Tracked Vehicle; a working platform, the working platform being arranged on the first crawler vehicle; A jacking unit is provided on the working platform and is used for excavating soil and pushing in jacking pipe sections; The jacking unit includes a machine head and a power assembly detachably connected to the machine head, and a spiral sleeve is detachably connected between the machine head and the power assembly; The construction method comprises the following steps: Step S1, driving the jacking equipment into the tunnel, installing, fixing and debugging it, and making the machine head face the side wall of the tunnel; Step S2, starting the power assembly to move the machine head toward the side wall of the tunnel for a first propulsion stroke; Step S3: when the first propulsion stroke is completed, the power assembly is stopped, the handpiece and the power assembly are separated, and then the power assembly is started to return to the initial position; Step S4, hoisting the spiral casing between the machine head and the power assembly by a hoisting device, and then fixing the spiral casing to the machine head and the power assembly respectively, wherein the spiral casing includes a jacking pipe section and a screw arranged in the jacking pipe section; Step S5, starting the power assembly, causing the machine head to continue to advance forward for a propulsion stroke while simultaneously pushing the spiral casing forward to push the jacking pipe section in; Step S6: stopping the power assembly and separating the power assembly from the spiral sleeve, and then starting the power assembly to return to the initial position; Step S7, looping steps S4 to S6 until the channel is connected; Step S8: Recover the machine head and use the power assembly to connect with the screw of the spiral sleeve, pull back the screw in the reverse direction, and recover the screw.

[0006] In the aforementioned pipe jacking construction method, optionally, the channel is a transverse channel between two adjacent tunnels.

[0007] Optionally, the construction method further includes driving the jacking equipment to a construction position of a next channel, then restoring the machine head and the power assembly, and repeating steps S1 to S8.

[0008] In the aforementioned pipe jacking construction method, optionally, the hoisting equipment includes a second crawler vehicle and a hoisting mechanism provided on the second crawler vehicle, and the construction method further includes driving the hoisting equipment to the side of the jacking equipment; or, The hoisting equipment is an airborne hoisting equipment arranged on the working platform.

[0009] Optionally, the spiral jacking system further includes a casing tool for installing jacking pipe sections and screws to form a spiral casing, and the construction method further includes transporting the casing tool to the side of the jacking equipment.

[0010] Optionally, the casing tooling includes: base; A movable trolley is used to support the jacking pipe section, and the movable trolley is movably arranged on the base along the length direction of the base; A support frame, which is arranged on the base and located on the side of the mobile vehicle; A clamping mechanism, the clamping mechanism being arranged on the support frame and being used to clamp or release one end of the screw; A supporting seat, which is used to support the screw, and the supporting seat is arranged on the support frame and located between the clamping mechanism and the moving trolley; When the clamping mechanism clamps one end of the screw, the other end of the screw is suspended in the air. By pushing the mobile trolley toward the support frame, the screw is inserted into the jacking pipe section, thereby realizing the installation of the jacking pipe section and the screw.

[0011] Optionally, the support frame includes a fixed frame arranged on the base and a swing frame arranged above the fixed frame and having one end rotatably connected to the fixed frame via a first rotating shaft, the axis of the first rotating shaft extends in a horizontal direction, and the axis of the first rotating shaft also extends in a radial direction of a screw installed on the clamping mechanism, a first angle adjustment mechanism is arranged between the other end of the swing frame and the fixed frame, the first angle adjustment mechanism is used to adjust the rotation angle of the swing frame relative to the fixed frame, and the clamping mechanism and the supporting seat are respectively arranged at intervals on the swing frame.

[0012] In the aforementioned pipe jacking construction method, optionally, the machine head includes a rotary support portion, a cutterhead rotatably arranged at the front end of the rotary support portion, and a transmission rod with one end connected to the cutterhead and located in the rotary support portion, wherein the transmission rod is a screw; The power assembly includes: A jacking iron, the jacking iron being movably arranged on the working platform along the front-rear direction of the jacking equipment; A reducer, the reducer being arranged on the top iron, the output shaft of the reducer being connected to a screw sleeve, the screw sleeve being used for detachable connection with the screw of the spiral sleeve or for detachable connection with the transmission rod; a driving motor connected to the reducer; A transition pipe, the transition pipe is arranged on the top iron and sleeved on the outside of the screw sleeve, and the transition pipe is used to be detachably connected to the top pipe section of the spiral sleeve or to be detachably connected to the rotary support portion; The first fluid power cylinder is used to drive the jacking iron to move on the working platform, thereby pulling the machine head to move along the front and rear directions of the jacking equipment.

[0013] Optionally, the first tracked vehicle includes a frame, tracks provided below the frame and on opposite sides of the frame, and a plurality of first ground-engaging legs provided on the frame, wherein the first ground-engaging legs are used to fix the first tracked vehicle relative to the ground; The rear portion of the working platform is rotatably connected to the rear portion of the vehicle frame via a third rotating shaft extending in the horizontal direction, and the front portion of the working platform is connected to the front portion of the vehicle frame via a second angle adjustment mechanism, which is used to adjust the inclination angle of the working platform on the vehicle frame; The jacking device further includes an extension frame slidably arranged on the working platform along the front-back direction of the jacking device, a third fluid power cylinder for driving the extension frame to slide, a plurality of second ground-engaging legs arranged at the front end of the extension frame, and a backrest mechanism arranged at the rear of the working platform, wherein the second ground-engaging legs are used to fix the extension frame relative to the ground; In step S1, the installation and fixation includes the following operations performed in sequence: 1) making the backrest mechanism abut against the other side wall of the tunnel; 2) making the first crawler vehicle fixed relative to the ground; 3) making the extension frame extend out of the working platform and abut against one side wall of the tunnel; 4) making the extension frame fixed relative to the ground.

[0014] Optionally, a discharge port is opened at the bottom of the transition pipe, and the jacking pipe excavation construction method also includes fixing the extension frame relative to the ground, installing a hopper on the extension frame and installing a belt conveyor under the hopper, and using a screw conveying mechanism to convey the material to the discharge port, and then the material falls into the belt conveyor through the hopper, and then the material is output from the tunnel, wherein the screw conveying mechanism is composed of all the jacking pipe sections and screws.

[0015] Due to the application of the above technical solution, the present invention has the following advantages compared with the prior art: The jacking equipment of the spiral jacking system adopted in the construction method of the present invention is easy and quick to transfer, the whole set of equipment has a compact structure, and the labor intensity of workers is greatly reduced.

[0016] The construction method of the present invention is suitable for the construction of a transverse passage between two adjacent coal lanes in the form of a hole instead of a lane. The pre-construction preparation and construction process are simple, the number of people required is small, the construction efficiency is high, and the cost is low. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments recorded in the embodiments of the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0018] Figure 1 A schematic structural diagram of a spiral pipe jacking system used in a pipe jacking construction method according to an embodiment of the present invention; Figure 2 for Figure 1 Schematic diagram of the top view of the spiral pipe jacking system; Figure 3 for Figure 1 Schematic diagram of the three-dimensional structure of the jacking equipment of the spiral jacking system (not all jacking units are shown); Figure 4 for Figure 1 A side view of the jacking equipment of the spiral pipe jacking system (not all jacking units are shown); Figure 5 for Figure 1 Schematic diagram of the structure of the connection between the head, spiral casing, reducer and drive motor of the spiral jacking system; Figure 6 For the general Figure 1 Schematic diagram of the movement of the jacking equipment when the spiral jacking system is applied to the construction of a horizontal channel; Figure 7 For the general Figure 1 Schematic diagram of the installation of spiral casing in the jacking equipment when the spiral jacking system is applied to the construction of a transverse channel; Figure 8 For the general Figure 1 Schematic diagram of the transverse channel penetration when the spiral jacking system is applied to the construction of the transverse channel (the second ground support leg is not shown); Figure 9 for Figure 1 A schematic diagram of the structure of the backrest mechanism in the jacking equipment of the spiral jacking system; Figure 10 for Figure 9 A side view of the backrest mechanism (elastic member not shown); Figure 11 for Figure 1 A schematic diagram of the full cross-section structure of the casing tooling of the spiral jacking system; Figure 12 for Figure 11 A in the middle is an enlarged schematic diagram; Figure 13 for Figure 11 A schematic diagram of the top structure of the casing tooling; Figure 14 for Figure 11 Side view of the enlarged structure of the casing tooling Figure 15 for Figure 11 A schematic diagram of the main structure of the casing tooling; Figure 16 for Figure 15 Enlarged schematic diagram of the cross-section in the middle BB direction; Figure 17 for Figure 15 Enlarged schematic diagram of CC section; Figure 18 for Figure 1 Schematic diagram of the structure of the lifting equipment of the spiral jacking system; Reference numerals: 1. Jacking equipment; 10. Jacking unit; 101. Jacking iron; 102. Transition pipe; 103. Machine head; 1031. Rotary support; 1032. Cutterhead; 104. First fluid power cylinder; 105. Drive motor; 106. Reducer; 107. Screw sleeve; 108. Transmission rod; 109. Screw; 110. Step; 111. Jacking pipe section; 20. First crawler; 201. Frame; 202. Crawler; 30. First ground support leg; 301. Fourth fluid power cylinder; 3 02, first tack head; 40, working platform; 401, support plate; 402, first guide rail; 50, extension frame; 501, second guide rail; 502, hopper; 60, second fluid power cylinder; 70, second ground support leg; 701, fifth fluid power cylinder; 702, second tack head; 80, third fluid power cylinder; 90, backrest mechanism; 901, base; 902, ball head; 903, backrest plate; 904, cover; 905, elastic member; 906, rib plate; 2. Casing tooling; 2a, base; 2a1, track; 3a, mobile trolley; 4a, support frame; 4a1, fixed frame; 4a2, swing frame; 5a, clamping mechanism; 5a1, lower clamping part; 5a2, upper clamping part; 5a3, first copper sleeve; 5a4, second copper sleeve; 5a5, locking bolt; 5a6, first baffle; 5a7, second baffle; 6a, supporting seat; 7a, first adjusting bolt; 8a, first nut; 9a, second adjusting bolt; 10a, second nut; 11a, third copper sleeve; 12a, third baffle; 13a, fourth copper sleeve; 3. Lifting equipment; 3b, second crawler vehicle; 4b, lifting mechanism; 5b, third ground support leg; 4. Laneway; 5. Belt conveyor; 1a, first rotating shaft; 1b, second rotating shaft; 1c, third rotating shaft. DETAILED DESCRIPTION

[0019] In order to enable those skilled in the art to better understand the technical solutions in the embodiments of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. All other embodiments obtained by those skilled in the art based on the embodiments in the embodiments of the present invention should fall within the scope of protection of the embodiments of the present invention.

[0020] In addition, the terms "first", "second", "third", "fourth", "fifth", etc. are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first", "second", "third", "fourth", "fifth", etc. may explicitly or implicitly include at least one of such features. In the description of the present invention, the meaning of "multiple" and "many" is at least two, such as two, three or more, etc., unless otherwise clearly and specifically defined. In addition, the terms "top", "bottom", "left", "right", "up", "down", "front", "back", "vertical", "horizontal" and their derivatives should be linked to the following: Figure 1 In the present application of center orientation, the nose direction is forward and the backrest direction is rearward, but it should be understood that, except where expressly indicated to the contrary, the present application may employ a variety of alternative terms.

[0021] The embodiment of the present invention provides a method for pipe jacking construction, which uses a spiral pipe jacking system such as Figures 1 to 18 The structure of the spiral pipe jacking system used in the embodiment of the present application is first described in detail below.

[0022] Figure 1 and Figure 2 The schematic diagram of the structure of the spiral pipe jacking system in different perspectives of an embodiment of the present invention is shown. As can be seen from the figure, the spiral pipe jacking system includes a jacking device 1, a casing tool 2, a lifting device 3 and a belt conveyor 5 for conveying materials ( Figure 6 Belt conveyor is shown in the figure), the hoisting equipment 3 and the casing tooling 2 are both located on the side of the jacking equipment 1, which is convenient for the installation of the screw and the jacking pipe section to form the spiral casing, and also for hoisting the spiral casing to the jacking equipment.

[0023] See also Figures 3 to 8 The jacking equipment 1 includes a first crawler vehicle 20, a working platform 40 and a jacking unit 10 ( Figure 1 and Figure 2 The jacking unit is shown in the figure), the jacking unit 10 is used to excavate the soil and push the jacking pipe section in, the working platform 40 is movably set on the first crawler vehicle 20, the jacking unit 10 is set on the working platform 40, and the first crawler vehicle 20 is used to support and move the jacking unit 10.

[0024] The first crawler vehicle 20 includes a frame 201 and crawlers 202 disposed below the frame 201 and located on opposite sides of the frame 201. Figure 4 As shown, the rear part of the working platform 40 is rotatably connected to the rear part of the vehicle frame 201 via a third rotating shaft 1c extending in the horizontal direction, and the front part of the working platform 40 and the front part of the vehicle frame 201 are connected via a second angle adjustment mechanism, which is used to adjust the inclination angle of the working platform 40 on the vehicle frame 201.

[0025] In an optional embodiment, the second angle adjustment mechanism is arranged to extend obliquely along the front and rear directions of the jacking equipment, and the front and rear ends of the second angle adjustment mechanism are rotatably connected to the front of the working platform 40 and the front of the frame 201 through the fourth rotating shaft and the fifth rotating shaft respectively. The fourth rotating shaft and the fifth rotating shaft both extend in the horizontal direction, and the third rotating shaft 1c, the fourth rotating shaft, and the fifth rotating shaft also extend in the left and right directions of the jacking equipment. The second angle adjustment mechanism is a second fluid power cylinder 60, which can be a hydraulic cylinder (oil cylinder) or a pneumatic cylinder.

[0026] When the spiral jacking system is used to construct a horizontal passage in a coal tunnel, if the tunnel ground is uneven, it is easy to cause the jacking unit to tilt. The second angle adjustment mechanism is used to adjust the inclination angle of the working platform 40, and then adjust the horizontality of the jacking unit to facilitate the construction of the jacking unit.

[0027] The first tracked vehicle 20 further includes a plurality of first ground-engaging legs 30 provided on the vehicle frame 201. The first ground-engaging legs 30 are used to fix the first tracked vehicle 20 relative to the ground. A plurality of first ground-engaging legs 30 can be provided, such as 2, 3, 4, 5, 6 or more. In this example, 4 first ground-engaging legs 30 are spaced apart along the circumferential direction of the vehicle frame 201. Each first ground-engaging leg 30 includes a first piercing head 302 for piercing into the ground or separating from the ground, and a fourth fluid power cylinder 301 connected between the first piercing head 302 and the vehicle frame 201. In some embodiments, the fourth fluid power cylinder 301 adopts a hydraulic cylinder (oil cylinder), and the main body of the fourth fluid power cylinder 301 is connected to the bottom of the frame body of the frame 201, and the piston of the fourth fluid power cylinder 301 is connected to the first piercing head 302. When the first crawler vehicle 20 needs to be fixed relative to the ground, the fourth fluid power cylinder 301 drives the first piercing head 302 to move downward and penetrate into the ground; when the first crawler vehicle 20 needs to move, the fourth fluid power cylinder 301 drives the first piercing head 302 to move upward and leave the ground, and the first crawler vehicle 20 is not restricted in moving.

[0028] The first piercing head 302 has a ground-piercing disc, and a plurality of vertebrae are integrally connected to the bottom of the ground-piercing disc to facilitate piercing into the ground.

[0029] Then by Figures 3 and 4 It can be seen that the jacking equipment also includes an extension frame 50 that is slidably arranged on the working platform 40 along the front and rear directions of the jacking equipment, a third fluid power cylinder 80 for driving the extension frame 50 to slide, a plurality of second ground-engaging legs 70 arranged at the front end of the extension frame 50, and a backrest mechanism 90 arranged at the rear of the working platform 40.

[0030] The front end of the extension frame 50 extends out of the working platform 40 , and the second ground-engaging legs 70 are used to fix the extension frame 50 relative to the ground. The second ground-engaging legs 70 can be provided in multiple numbers, such as 2, 3 or more. As in this example, the two second ground-engaging legs 70 are spaced apart at the front end of the extension frame 50. Each second ground-engaging leg 70 includes a second engaging head 702 for engaging into the ground or separating from the ground, and a fifth fluid-powered cylinder 701 connected between the second engaging head 702 and the extension frame 50. In some embodiments, the fifth fluid-powered cylinder 701 adopts a hydraulic cylinder (oil cylinder), and the main body of the fifth fluid-powered cylinder 701 is connected to the front end of the extension frame 50, and the piston of the fifth fluid-powered cylinder 701 is connected to the second engaging head 702. When the extension frame 50 is slid forward and needs to be fixed relative to the ground, the fifth fluid-powered cylinder 701 drives the second engaging head 702 to move downward and engage into the ground; when the extension frame 50 needs to slide backward and retract, the fifth fluid-powered cylinder 701 drives the second engaging head 702 to move upward and separate from the ground, and the sliding of the extension frame 50 is not restricted.

[0031] In this case, Figure 3 It can be seen that the extension frame 50 and the working platform 40 are slidably connected through a guide rail mechanism extending along the front and rear directions of the jacking equipment. The guide rail mechanism includes a first guide rail 402 and a second guide rail 501 slidably connected to the first guide rail 402. The first guide rail 402 is fixedly connected to the working platform 40, and the second guide rail 501 is fixedly connected to the extension frame 50. A slide groove is formed on the first guide rail 402 along its length direction, and a slider is connected to the position of the second guide rail 501 corresponding to the slide groove. The slider is slidably arranged in the slide groove along the length of the slide groove.

[0032] The third fluid power cylinder 80 is a hydraulic cylinder (oil cylinder), which is extended along the front and rear directions of the jacking equipment, and is respectively arranged on the left and right sides of the working platform 40, so that the extension frame 50 is evenly stressed when it extends out of the working platform 40 and abuts against or retracts against the side wall of the tunnel.

[0033] A support plate 401 is fixedly provided in the vertical direction at the rear of the working platform 40, and a backrest mechanism 90 is provided on the support plate 401. The extension frame 50 and the backrest mechanism 90 are respectively used to abut against the opposite side walls of the working area during the construction process, thereby further stabilizing the first crawler vehicle and ensuring the stability of the equipment during the construction process.

[0034] By combining the backrest mechanism 90 with the extension frame 50, the jacking equipment can maintain stability when constructing a cross passage in a coal lane through the backrest mechanism 90 and the extended extension frame 50 against the side walls of the lane. When the jacking equipment is in motion, the extension frame 50 can be retracted and brought closer to the working platform 40, resulting in a compact structure and free movement within the coal lane.

[0035] To better adapt to the uneven sidewalls of the roadway, see Figure 9 As shown, the backrest mechanism 90 includes a base 901 fixed on the support plate 401, a ball head 902 arranged on the base 901 and a backrest plate 903. The backrest plate 903 is provided with a ball socket for accommodating the ball head 902. The ball head 902 is located in the ball socket and is rotatably arranged in the ball socket. When the backrest mechanism is in contact with the uneven side wall of the tunnel, the backrest plate 903 rotates around the ball head 902, so that the backrest plate 903 can effectively adapt to the uneven side wall of the tunnel, and the ball head 902 is used to rotate between the backrest plate 903 and the base 901, which helps to evenly distribute the load and avoid stress concentration.

[0036] The base 901 may include a base plate fixedly connected to the support plate 401 by bolts and a connecting rod integrally connected to the base plate. The ball head 902 is integrally connected to the connecting rod. The outer diameter of the connecting rod is smaller than the outer diameter of the ball head. The base plate, the connecting rod and the ball head are integrally formed.

[0037] Depend on Figure 9 As can be seen, the backrest mechanism 90 also includes a stopper 904 connected to the backrest plate 903 and used to prevent the ball head 902 from disengaging from the socket, and multiple elastic members 905 disposed between the support plate 401 and the backrest plate 903. The elastic members 905 are springs extending in the front-to-back direction of the jacking device, with each spring's ends connected to the backrest plate 903 and the support plate 401, respectively. The multiple springs are evenly spaced along the circumference of the ball head 902. The multiple elastic members 905 limit the rotation angle of the backrest plate 903 and return the backrest plate 903 to its initial position. The springs can be tension springs.

[0038] In some embodiments, as Figure 10 It can be seen that a plurality of ribs 906 are radially arranged around the ball head 902 on the side of the backrest board 903 facing the base 901 , which can improve the bearing capacity of the backrest board 903 .

[0039] See also Figures 5 to 8 The jacking unit 10 includes a machine head 103 and a power assembly, and at least one spiral sleeve is detachably connected between the machine head 103 and the power assembly.

[0040] A plurality of spiral sleeves can be provided, each spiral sleeve comprising a top pipe section 111 and a screw 109 provided in the top pipe section 111, see Figure 7 When the spiral jacking system is excavating, the spiral casing is hoisted onto the working platform 10 by a hoisting device and one or more spiral casings are sequentially connected between the machine head and the power assembly.

[0041] Then by Figure 5It can be seen that the head 103 includes a rotary support part 1031, a cutter disc 1032 rotatably arranged at the front end of the rotary support part 1031, and a transmission rod 108 one end of which is connected to the cutter disc 1032 and is located inside the rotary support part 1031. The transmission rod 108 is detachably connected to the screw of the spiral casing, and the screw of the spiral casing is also detachably connected to the power assembly; the rotary support part 1031 is detachably connected to the top pipe section of the spiral casing, and the top pipe section of the spiral casing is also detachably connected to the power assembly.

[0042] The power assembly includes a top iron 101, a reducer 106, a drive motor 105 connected to the reducer 106, a transition pipe 102, and a first fluid power cylinder 104, wherein: See also Figure 1 and Figure 5 , the top iron 101 is movably arranged on the working platform 40 along the front and rear directions of the jacking equipment; the reducer 106 is arranged on the top iron 101, and the output shaft of the reducer 106 is connected to the screw sleeve 107, and the screw sleeve 107 is detachably connected to the screw of the spiral casing; the transition pipe 102 is arranged on the top iron 101 and is sleeved on the outside of the screw sleeve 107, and the transition pipe 102 is detachably connected to the top pipe section of the spiral casing; the first fluid power cylinder 104 is arranged on the support plate 401, and the first fluid power cylinder 104 is used to drive the top iron 101 to move on the working platform 40, and then pull the machine head 103 to move along the front and rear directions of the jacking equipment.

[0043] The transmission rod 108 is a screw, and all screws include a rod body and spiral blades extending spirally along the length of the rod body. A discharge port is opened at the bottom of the transition pipe 102 to facilitate the discharge of the excavated materials. During construction, a hopper 502 is set at the bottom of the extension frame 50, and the belt conveyor 5 is set below the hopper 502.

[0044] In some embodiments, the rod body of all screw rods is set to a hollow structure and a through hole is opened on the side wall of the rod body for spraying water. A water inlet channel is opened on the screw sleeve 107. When the screw sleeve, screw and transmission rod are connected, the water inlet channel is connected to the hollow structure of the screw and transmission rod.

[0045] During construction, a screw conveying mechanism for conveying the excavated materials is formed between all the top pipe sections 111 and the screw 109. During the rotation of the transmission rod 108 and the screw 109, the spiral blades push the materials backward in the top pipe section 111 to the discharge port at the bottom of the transition pipe 102. The materials are discharged from the discharge port and fall into the hopper 502. From the hopper 502, they fall into the belt conveyor 5, and then the materials are output to the tunnel 4.

[0046] In an alternative embodiment, the first fluid-powered cylinder 104 may be a hydraulic cylinder (oil cylinder), disposed on the left and right sides of the top iron 101. The body of each first fluid-powered cylinder 104 is connected to the top iron 101, and the piston of each first fluid-powered cylinder 104 is connected to the support plate 401. The reciprocating motion of the piston of the first fluid-powered cylinder 104 pulls the top iron 101 to move on the work platform 40. In other alternative embodiments, the body of the first fluid-powered cylinder 104 may also be connected to the support plate, and the piston may be connected to the top iron.

[0047] In some embodiments, the transition pipe 102 and the top pipe segment 111 may be made of steel, such as carbon steel or other types of steel, which have high structural strength.

[0048] Compared with the traditional jacking system that installs a vacuum suction pipe in the jacking pipe section to discharge materials, the spiral jacking system of the embodiment of the present application has a more stable discharge and can avoid pipe blockage. Even if there are large-sized rock materials in the jacking pipe section, they can be crushed in the screw conveying mechanism, and the structure is simpler and more compact.

[0049] When the spiral pipe jacking system of the embodiment of the present application is used to construct a transverse passage between two adjacent tunnels (such as a coal tunnel), refer to Figure 6 The jacking equipment enters tunnel 4 along the length direction of tunnel 4. When it reaches the construction work area, the first crawler vehicle rotates 90°, driving the jacking unit to rotate 90°, so that the length direction of the jacking unit is consistent with the length direction of the crawler of the first crawler vehicle, avoiding lateral force on the crawler during the construction of the transverse channel.

[0050] After the first crawler vehicle drives the jacking unit to rotate 90°, the length direction of the jacking unit is perpendicular to the length direction of the tunnel, so that the cutter head of the jacking unit faces the working surface. Then the first crawler vehicle moves backward so that the backrest mechanism of the jacking equipment is close to the side wall of the tunnel. Then the fourth fluid power cylinder 301 drives the first piercing head 302 to move downward so that the first piercing head 302 is driven into the ground. Under the dual action of the backrest mechanism and the first ground-piercing support leg, the entire jacking equipment remains stable and can provide sufficient support and reaction force.

[0051] Driven by the third drive mechanism 80, the extension frame 50 extends forward, causing its front end to abut against the other sidewall of the tunnel. The second drive mechanism 701 then drives the second piercing head 702 downward, causing it to penetrate the ground, thereby further stabilizing the entire jacking apparatus. Furthermore, by having the first and second piercing heads 302 and 702 penetrate the ground to stabilize the jacking apparatus, the need for hardened ground is eliminated, significantly simplifying construction processes, simplifies construction methods, and reduces construction and labor costs.

[0052] See also Figure 1 and Figure 8 , place the belt conveyor 5 under the hopper 502 on the extension frame 50, and the hoisting device 3 moves to the side of the jacking device. The hoisting device 3 lifts the head 103 onto the working platform 40, and then connects the head 103 to the transition pipe 102. Then start the first fluid power cylinder 104 to push the top iron 101 forward, push the head 103 forward for a movement stroke, and then separate the head 103 from the transition pipe 102. The first fluid power cylinder 104 pulls the top iron 101 backward to return to its initial position. Figure 7 Then, the jacking pipe section 111 with the screw 109 placed inside is hoisted onto the working platform 40 by the hoisting equipment, and the first fluid power cylinder 104 is used to drive the jacking pipe section 111 to slide forward until it is against the machine head 103, and the screw 109 is connected to the transmission rod 108. The drive motor 105 and the reducer 106 work to drive the screw sleeve 107 to rotate, and then drive the screw 109 and the transmission rod 108 to rotate, and drive the cutter head 1032 to rotate, realizing the horizontal channel construction. At the same time, the material cut off by the cutter head 1032 is transported to the discharge port of the transition pipe 102 through the screw conveying mechanism composed of the screw 109 and all the jacking pipe sections, and finally transported out through the belt conveyor 5.

[0053] In an optional embodiment, the connection between the screw, the screw sleeve and the transmission member may be a spline connection.

[0054] After part of the jacking pipe section is pushed into the soil, the transition pipe 102 is separated from the jacking pipe section, and the first fluid power cylinder 104 is used to reset the top iron 101. The lifting equipment repeats the lifting of another jacking pipe section. This reciprocating process is used to realize the construction of the transverse channel, and finally it is connected. Figure 8 shown.

[0055] In the optional embodiment provided by the present invention, the installation of the screw rod and the jacking pipe section is different from the traditional installation method (the traditional method is to first fix the jacking pipe section, and then manually use a hand winch to obliquely pull the screw rod into the jacking pipe section). In the optional embodiment of the present invention, a sleeve tool for installing the screw rod and the jacking pipe section is used to install the screw rod and the jacking pipe section. The structure of the sleeve tool is as follows: Figures 11 to 17 shown.

[0056] As can be seen from the figure, the casing fixture includes a base 2a, a movable trolley 3a, a support frame 4a, a clamping mechanism 5a and a supporting seat 6a, wherein: The bottom of the mobile trolley 3a has wheels on two opposite sides, and the base 2a is provided with tracks 2a1 at positions corresponding to the wheels on both sides of the mobile trolley 3a. Each track 2a1 extends along the length direction of the base 2a. Figure 11 and Figure 13The moving trolley 3a is used to support the jacking pipe section 111. The wheels of the moving trolley 3a are set on the track 2a1 and roll along the length direction of the track 2a1. Under the action of external force, the wheels move on the track 2a1 and drive the moving trolley 3a to move on the base 2a along the length direction of the base 2a.

[0057] See also Figures 11 to 17 , the support frame 4a is arranged on the base 2a and is located on the side of the mobile trolley 3a, the support frame 4a is also located at one end of the base 2a, the clamping mechanism 5a is arranged on the support frame 4a, the clamping mechanism 5a is used to clamp or release one end of the screw 109; the supporting seat 6a is arranged on the support frame 4a and is located on the side of the clamping mechanism 5a, the supporting seat 6a is also located between the clamping mechanism 5a and the mobile trolley 3a, the supporting seat 6a is used to support the screw 109, when the clamping mechanism 5a clamps one end of the screw 109, the end of the screw 109 also Located on the support seat 6a, the other end of the screw rod 109 is suspended in the air at a certain height to facilitate the insertion of the jacking pipe section. After the screw rod 109 is clamped, the mobile trolley 3a is pushed by an external force to move toward the support frame 4a, so that the screw rod 109 is inserted into the jacking pipe section 111, and the screw rod 109 and the jacking pipe section 111 are installed. After the screw rod 109 and the jacking pipe section 111 are installed, the clamping mechanism 5a releases the screw rod 109, and the jacking pipe section can be hoisted to the working platform of the jacking equipment using a lifting device. Then, the mobile trolley 3a is pushed by an external force to move away from the support frame 4a, preparing for the installation of the next jacking pipe section and the screw rod.

[0058] One end of the rod body of the screw rod 109 is integrally connected with an inserting portion, and the other end is internally formed with a slot for inserting the inserting portion of the adjacent screw rod. The clamping mechanism 5a clamps the inserting portion of the screw rod 109, and the supporting seat 6a is also used to support the inserting portion of the screw rod 109.

[0059] When constructing the jacking pipe for the horizontal passage of a coal mine, the entire spiral jacking system needs to be arranged in the coal roadway, and the casing tooling also needs to be arranged in the roadway. The roadway ground is usually uneven. In order to ensure the horizontality of the screw and the jacking pipe section during installation, see Figure 11 and Figure 12The support frame 4a includes a fixed frame 4a1 arranged on the base 2a and a swing frame 4a2 whose one end is rotatably connected to the fixed frame 4a1 through a first rotating shaft 1a. The axis of the first rotating shaft 1a extends in the horizontal direction, and the axis of the first rotating shaft 1a also extends in the radial direction of the screw 109 installed on the clamping mechanism. A first angle adjustment mechanism is arranged between the other end of the swing frame 4a2 and the fixed frame 4a1. The first angle adjustment mechanism is used to adjust the rotation angle of the swing frame 4a2 relative to the fixed frame 4a1. The clamping mechanism 5a and the supporting seat 6a are respectively arranged at intervals on the swing frame 4a2, and the first rotating shaft 1a is located between the first angle adjustment mechanism and the moving trolley 3a.

[0060] See also Figure 14 and Figure 17 The first angle adjustment mechanism includes a first adjusting bolt 7a and a first nut 8a threadedly connected to the first adjusting bolt 7a. The upper end of the first adjusting bolt 7a is connected to the swing frame 4a2, and the lower end passes through the fixed frame 4a1 and is threadedly connected to the first nut 8a. The cooperation between the first adjusting bolt 7a and the first nut 8a is also used to pull the fixed frame 4a1 to transmit force to the swing frame 4a2. By adjusting the connection position of the first nut 8a on the first adjusting bolt 7a, the rotation angle of the swing frame 4a2 relative to the fixed frame 4a1 is adjusted, and then the horizontality of the screw 109 is adjusted to adapt to complex and changeable ground (such as uneven ground).

[0061] As can be seen from the figure, the first angle adjustment mechanism also includes second adjusting bolts 9a arranged on opposite sides of the first adjusting bolt 7a and second nuts 10a threadedly connected to the second adjusting bolts 9a. Each second adjusting bolt 9a is threadedly connected to the fixing frame 4a1, and the upper end of each second adjusting bolt 9a passes through the fixing frame 4a1 and is located between the fixing frame 4a1 and the swing frame 4a2. The second nut 10a is threadedly connected to the second adjusting bolt 9a and the upper end surface of the second nut 10a abuts against the fixing frame 4a1 to prevent the second adjusting bolt 9a from loosening.

[0062] When the screw is not present, the swing frame 4a2 sags due to gravity. By adjusting the connection position of the second adjusting bolt 9a on the fixed frame 4a1, the second adjusting bolt 9a drives the swing frame 4a2 to rotate to the desired height. Then, the first nut 8a is rotated until the upper end surface of the first nut 8a contacts the fixed frame 4a1. On the one hand, the swing frame 4a2 will not rotate downward due to the action of the second adjusting bolt 9a. On the other hand, even with the screw, the swing frame 4a2 will not rotate upward due to the action of the first nut 8a. In this way, the swing frame 4a2 can be adjusted in angle by the angle adjustment mechanism to better adapt to different ground conditions and ensure the horizontal installation of the screw. After the swing frame's rotation angle is adjusted, the swing frame can be kept relatively fixed to prevent it from shaking up and down.

[0063] In other optional embodiments, the first adjusting bolt 7a may have its lower end connected to the fixed frame 4a1, and its upper end passing through the swing frame 4a2 before being connected to the first nut 8a. The second adjusting bolt 9a may also be threadedly connected to the swing frame 4a2, with the lower end of each second adjusting bolt 9a passing through the swing frame 4a2 and positioned between the fixed frame 4a1 and the swing frame 4a2. The second nut 10a is threadedly connected to the second adjusting bolt 9a, with the lower end surface of the second nut 10a abutting the swing frame 4a2 to prevent the second adjusting bolt 9a from loosening.

[0064] See also Figures 12 to 14 and Figure 17 The clamping mechanism 5a comprises a lower clamping portion 5a1 mounted on the swing frame 4a2, an upper clamping portion 5a2 pivotally connected to the lower clamping portion 5a1 at one end via a second rotating shaft 1b, and a locking assembly for securing the lower and upper clamping portions 5a1 and 5a2 relative to each other. The axis of the second rotating shaft 1b extends along the length of the base 2a. By hingedly connecting the lower and upper clamping portions 5a1 and 5a2, the upper clamping portion 5a2 can be swung and lifted when installing the screw, eliminating the need to remove and install the bolts each time, reducing work time and labor.

[0065] The lower clamping portion 5a1 has a first groove formed by a downward depression on the upper side, and the upper clamping portion 5a2 has a second groove formed by an upward depression on the lower side. A first copper sleeve 5a3 is embedded in the groove wall of the first groove, and a second copper sleeve 5a4 is embedded in the groove wall of the second groove. When the clamping mechanism 5a clamps the screw 109, the first copper sleeve 5a3 and the second copper sleeve 5a4 together form an accommodating groove for accommodating the screw 109. When the clamping mechanism 5a clamps the screw 109, the first copper sleeve 5a3 and the second copper sleeve 5a4 are in contact with the screw, which helps to protect the machined surface of the screw. The machined surface of the screw requires very high fitting accuracy. If it is bumped or burred during the clamping process, it will bring a lot of workload to the subsequent installation. The hardness of the copper material is much lower than the hardness of the screw, which can effectively avoid bumps and burrs.

[0066] In order to prevent the first copper sleeve 5a3 and the second copper sleeve 5a4 from detaching from the groove, the clamping mechanism 5a also includes a first baffle 5a6 connected to the lower clamping part 5a1 and used to fix the first copper sleeve 5a3 on the groove wall of the first groove, and a second baffle 5a7 connected to the upper clamping part 5a2 and used to fix the second copper sleeve 5a4 on the groove wall of the second groove. For example, the first copper sleeve 5a3 has a first baffle 5a6 on opposite sides, the first baffle 5a6 is connected to the lower clamping part 5a1 by bolts, and the first copper sleeve 5a3 abuts against the first baffle 5a6; the second copper sleeve 5a4 has a second baffle 5a7 on opposite sides, the second baffle 5a7 is connected to the upper clamping part 5a2 by bolts, and the second copper sleeve 5a4 abuts against the second baffle 5a7.

[0067] See also Figure 12 and Figure 17 The locking assembly includes a locking bolt 5a5 threadedly connected to the upper clamping portion 5a2, and the locking bolt 5a5 is also threadedly connected to or separated from the lower clamping portion 5a1, for relative locking or separation of the lower clamping portion 5a1 and the upper clamping portion 5a2, and the locking bolt 5a5 is threadedly connected to the other end of the upper clamping portion 5a2.

[0068] See also Figure 12 and Figure 16 The supporting seat 6a has a third groove with the upper side concave downward, and a third copper sleeve 11a is embedded in the third groove. When the screw 109 is located on the supporting seat 6a, the screw 109 contacts the third copper sleeve 11a, and the third copper sleeve 11a helps to protect the processing surface of the screw.

[0069] To prevent the third copper sleeve 11a from detaching from the groove wall of the third groove, the supporting seat 6a is also connected to a third baffle 12a for fixing the third copper sleeve 11a on the groove wall of the third groove. The third baffle 12a is connected to the supporting seat 6a by bolts. The third copper sleeve 11a has third baffles 12a on two opposite sides, and the upper end surface of the third copper sleeve 11a is in contact with the lower end surface of the third baffle 12a.

[0070] In order to accommodate screws of different diameters, a fourth copper sleeve 13a is selectively provided between the screw and the third copper sleeve 11a.

[0071] See also Figure 11 Steps 110 are formed on the inner walls of both ends of the jacking pipe section 111. The inner diameter of each end step 110 is smaller than the inner diameter of the jacking pipe section 111. The setting of the steps 110 can be used to support the screw 109. During the construction of the spiral jacking system, since the screw needs to be placed inside the jacking pipe, if the screw is too long during the construction process, the screw is prone to drooping, and the drooping is serious in the case of being too long, affecting the drive of the screw and even making it difficult to drive the screw. The setting of the steps 110 ensures that during the construction of the jacking pipe, there are steps at intervals to support the screw, preventing the screw from sagging. During the entire jacking construction process, the screw is ensured to remain horizontal, so that it can be transported horizontally as much as possible, greatly reducing the extent to which the drive of the screw is affected by its excessive length.

[0072] If the screw and jacking pipe section installation method used in the background art is used, the installation process will be more time-consuming due to the steps inside the jacking pipe section and the irregular outer surface of the screw due to the presence of the spiral blades. However, the use of the casing tooling of the embodiment of the application to install the screw and jacking pipe section greatly reduces manual labor intensity and improves construction efficiency.

[0073] This casing tool is used to install screws and jacking pipe sections. According to the actual ground conditions, the rotation angle of the swing frame relative to the fixed frame is adjusted to ensure the horizontality of the subsequent screw installation.

[0074] Then open the upper clamping part, lift the screw to the top of the base, and lift one end of the screw to the lower clamping part and the supporting seat, then close the upper clamping part and lock the upper clamping part and the lower clamping part with the locking bolt to fix the screw, and the other end of the screw is suspended in the air at a certain height to facilitate the subsequent installation of the jacking pipe section.

[0075] Then hoist the jacking pipe section onto the movable platform, manually push the movable platform toward the support frame, insert the screw into the jacking pipe section, complete the installation of the screw and the jacking pipe section, and then release the screw by the clamping mechanism. The jacking pipe section can be hoisted to the working platform of the jacking equipment to carry out the construction of spiral jacking.

[0076] The screw and the jacking pipe joint can be installed quickly, and there is no need to pull the screw manually, which greatly reduces the labor intensity of workers and improves construction safety. The installation process is simple and fast, which greatly improves construction efficiency.

[0077] In an alternative embodiment of the present invention, reference Figure 1~Figure 2 and Figure 18 The lifting equipment 3 includes a second crawler vehicle 3b, a lifting mechanism 4b arranged on the second crawler vehicle 3b, and a third ground-engaging support leg 5b arranged on the second crawler vehicle 3b. The third ground-engaging support leg 5b is used to fix the second crawler vehicle 3b relative to the ground. The third ground-engaging support leg 5b includes a third piercing head for piercing into the ground or separating from the ground and a sixth fluid power cylinder connected between the third piercing head and the second crawler vehicle.

[0078] The second crawler vehicle 3b of the lifting equipment 3 is also provided with an operating table for use by operators, a lighting device for lighting, and a pump station component. The lighting device is such as a headlight and a rearlight arranged at the front and rear parts of the roof of the second crawler vehicle.

[0079] In other optional embodiments, the lifting equipment may also be an airborne lifting equipment arranged on the working platform.

[0080] In other embodiments, all fluid-powered cylinders may also be pneumatic cylinders.

[0081] The spiral pipe jacking system provided above has at least the following advantages: During construction, this spiral pipe jacking system uses a backrest mechanism and extensions to press against opposing walls of the work area, maintaining stability and helping to ensure construction stability. Furthermore, as the jacking equipment moves, the extensions can be retracted and aligned with the work platform, allowing for unrestricted movement and free movement of the jacking equipment in a compact structure. Furthermore, the backrest mechanism's backrest plate rests against the side walls of the work area and can rotate around a ball head, effectively adapting to uneven sidewalls. This system is suitable for the construction of transverse passages in coal tunnels.

[0082] When the casing fixture of the spiral jacking system is used to install the jacking pipe section and the screw, the screw is hoisted onto the base, and one end of the screw is placed on the supporting seat. At the same time, the clamping mechanism is used to clamp the end of the screw, and the jacking pipe section is hoisted onto the mobile trolley. Under the action of external force, the mobile trolley is pushed to move it toward the support frame so that the screw is inserted into the inside of the jacking pipe section to realize the installation of the screw and the jacking pipe section. Not only can the screw and the jacking pipe section be installed quickly, but the labor intensity of workers is greatly reduced. The installation process is safe and simple, and the construction efficiency is greatly improved.

[0083] The spiral jacking system can be applied to larger-sized holes in coal seams with a diameter of less than 1200mm. It can be formed in one step and can realize parallel operations such as hole formation, support, and slag removal. There is no hole collapse, good quality, and high efficiency.

[0084] The jacking distance of the spiral jacking system is about 100m, and the axis of the tunnel can be controlled within the range of 0~50mm.

[0085] The spiral pipe jacking system adopts a spiral continuous slag discharge method, which can complete a drainage hole (horizontal channel) in about 3 days, with high work efficiency.

[0086] The spiral pipe jacking system adopts crawler walking mode to achieve rapid movement and transfer. The entire system is easy to operate and requires only 2 to 3 operators.

[0087] The spiral jacking system is used to construct a transverse passage between two adjacent coal lanes. The specific construction method includes the following steps: Step 10, construction preparation; In this step, construction preparation includes layout preparation and material preparation, such as driving the jacking equipment into the tunnel, driving the lifting equipment into the tunnel and locating it to the side of the jacking equipment, transporting the casing tool into the tunnel and locating it to the side of the jacking equipment, transporting the screw and jacking pipe section into the tunnel and locating it to the side of the casing tool, and transporting the belt conveyor into the tunnel.

[0088] Step 20: Installation, fixing and debugging; In this step, see Figure 6After the jacking equipment travels along the length direction of the tunnel into the tunnel, it rotates 90° so that the jacking unit faces one side wall of the tunnel, and then controls the jacking equipment to retreat until the backrest mechanism abuts against the other side wall of the tunnel, and then uses the first ground-engaging support leg to fix the first crawler vehicle relative to the ground; then controls the extension frame to extend forward so that it abuts against one side wall of the tunnel, and then uses the second ground-engaging support leg to fix the extension frame relative to the ground.

[0089] In this step, after the extension frame is fixed, the hopper is installed on the extension frame, and a belt conveyor is set under the hopper.

[0090] In this step, if the ground is uneven, the second angle adjustment mechanism is used to adjust the level of the working platform so that the machine head maintains a horizontal direction during excavation. The first angle adjustment mechanism is also used to adjust the level of the screw pre-installed on the casing fixture to ensure that the screw and the jacking pipe section are installed horizontally.

[0091] After the hoisting equipment travels to the construction location, the second crawler vehicle is fixed relative to the ground through the third ground-fixing support legs.

[0092] In this step, the machine head is lifted by a lifting device so that it is against the power assembly, and then the two are connected, such as connecting the rotary support part of the machine head to the transition pipe, and connecting the transmission rod to the screw sleeve.

[0093] Step 30: Pipe jacking construction; Step 301: Start the first fluid power cylinder to move the machine head toward the side wall of the tunnel for the first propulsion stroke; Step 302: When the first propulsion stroke is completed, stop the first fluid power cylinder, separate the rotary support portion from the transition pipe, separate the transmission rod from the screw sleeve, start the first fluid power cylinder to retract, and pull the top iron back to the initial position.

[0094] During the advancement of the stroke, the screw can be lifted to the top of the casing tooling by the lifting equipment, and one end of the screw can be clamped by the clamping mechanism. Then, the jacking pipe section can be lifted to the mobile trolley by the lifting equipment, and the mobile trolley is pushed manually to move toward the screw, so that the screw is inserted into the jacking pipe section to complete the installation of the screw and the jacking pipe section to obtain the spiral casing.

[0095] Step 303: Use a lifting device to lift the spiral casing onto the work platform, positioning the spiral casing between the machine head and the power assembly. The first fluid power cylinder is then activated to push the jacking iron forward, causing the jacking pipe section to abut against the rotary support portion and the transition pipe, respectively. The first fluid power cylinder is then stopped, and the jacking pipe section is connected to the rotary support portion and the transition pipe, respectively. The screw is then plugged into the transmission rod and the screw sleeve, respectively. The drive motor is restarted, and the torque is transmitted to the cutterhead through the reducer and the screw, causing the cutterhead to rotate. The first fluid power cylinder is restarted, pushing the head forward for a propulsion stroke to push the jacking pipe segment in. At the same time, the cutterhead cuts the side wall of the tunnel, and the screw conveying mechanism composed of the screw and the jacking pipe segment conveys the cut material backward to the discharge port of the transition pipe, and the material falls into the belt conveyor through the hopper, realizing the slag discharge function of the jacking equipment. When the propulsion stroke is completed, the driving motor and the first fluid power cylinder are stopped, and the top pipe section is separated from the transition pipe and the screw is separated from the screw sleeve, and then the first fluid power cylinder is started to pull the top iron back to the initial position.

[0096] Step 304, loop step 303 until the channel is connected, see Figure 8 .

[0097] Step 40: Recover the die head and screw; In this step, after the passage is through, the rotary support part is separated from the top pipe section, and the transmission rod is separated from the screw rod, and the machine head is disassembled and transported to a designated location for storage.

[0098] After the machine head is recovered, the transition pipe and the top pipe section are separated, and the first fluid power cylinder is used to return to the initial position, and the screw is pulled back in the opposite direction. One screw is recovered in each stroke until all the screws are recovered.

[0099] In this way, the jacking tunnel construction of a channel is completed, and the channel can be used as a gas extraction pipeline.

[0100] If multiple transverse channels need to be excavated between two adjacent tunnels, the jacking equipment and hoisting equipment will be moved to the construction position of the next channel, the machine head and spiral casing will be restored and installed, and the above steps 10 to 40 will be repeated.

[0101] The above implementation methods are only used to illustrate the embodiments of the present invention, and are not intended to limit the embodiments of the present invention. Ordinary technicians in the relevant technical field may make various changes and modifications without departing from the spirit and scope of the embodiments of the present invention. Therefore, all equivalent technical solutions also fall within the scope of the embodiments of the present invention, and the scope of patent protection of the embodiments of the present invention should be defined by the claims.

Claims

1. A pipe jacking construction method, characterized in that: The construction method adopts a spiral jacking system for construction, and the spiral jacking system includes jacking equipment and hoisting equipment; The jacking equipment includes: First Tracked Vehicle; a working platform, the working platform being arranged on the first crawler vehicle; A jacking unit is provided on the working platform and is used for excavating soil and pushing in jacking pipe sections; The jacking unit includes a machine head and a power assembly detachably connected to the machine head, and a spiral sleeve is detachably connected between the machine head and the power assembly; The construction method comprises the following steps: Step S1, driving the jacking equipment into the tunnel, installing, fixing and debugging it, and making the machine head face the side wall of the tunnel; Step S2, starting the power assembly to move the machine head toward the side wall of the tunnel for a first propulsion stroke; Step S3: when the first propulsion stroke is completed, the power assembly is stopped, the handpiece and the power assembly are separated, and then the power assembly is started to return to the initial position; Step S4, hoisting the spiral casing between the machine head and the power assembly by a hoisting device, and then fixing the spiral casing to the machine head and the power assembly respectively, wherein the spiral casing includes a jacking pipe section and a screw arranged in the jacking pipe section; Step S5, starting the power assembly, causing the machine head to continue to advance forward for a propulsion stroke while simultaneously pushing the spiral casing forward to push the jacking pipe section in; Step S6: stopping the power assembly and separating the power assembly from the spiral sleeve, and then starting the power assembly to return to the initial position; Step S7, looping steps S4 to S6 until the channel is connected; Step S8: Recover the machine head and use the power assembly to connect with the screw of the spiral sleeve, pull back the screw in the reverse direction, and recover the screw.

2. The pipe jacking construction method according to claim 1, characterized in that: The passage is a transverse passage between two adjacent lanes.

3. The pipe jacking construction method according to claim 2, characterized in that: The construction method further includes driving the jacking equipment to a construction position of the next channel, then restoring the machine head and the power assembly, and repeating steps S1 to S8.

4. The pipe jacking construction method according to any one of claims 1 to 3, characterized in that: The hoisting device includes a second crawler vehicle and a hoisting mechanism provided on the second crawler vehicle, and the construction method further includes driving the hoisting device to the side of the jacking device; or The hoisting equipment is an airborne hoisting equipment arranged on the working platform.

5. The pipe jacking construction method according to any one of claims 1 to 3, characterized in that: The spiral jacking system also includes a casing tool for installing jacking pipe sections and screws to form a spiral casing. The construction method also includes moving the casing tool to the side of the jacking equipment.

6. The pipe jacking construction method according to claim 5, characterized in that: The casing tooling comprises: base; A movable trolley is used to support the jacking pipe section, and the movable trolley is movably arranged on the base along the length direction of the base; A support frame, which is arranged on the base and located on the side of the mobile vehicle; A clamping mechanism, the clamping mechanism being arranged on the support frame and being used to clamp or release one end of the screw; A supporting seat, which is used to support the screw, and the supporting seat is arranged on the support frame and located between the clamping mechanism and the moving trolley; When the clamping mechanism clamps one end of the screw, the other end of the screw is suspended in the air. By pushing the mobile trolley toward the support frame, the screw is inserted into the jacking pipe section, thereby realizing the installation of the jacking pipe section and the screw.

7. The pipe jacking construction method according to claim 6, characterized in that: The support frame includes a fixed frame arranged on the base and a swing frame arranged above the fixed frame and rotatably connected to the fixed frame by a first rotating shaft at one end, the axis of the first rotating shaft extends in a horizontal direction, and the axis of the first rotating shaft also extends in a radial direction of a screw installed on the clamping mechanism, a first angle adjustment mechanism is provided between the other end of the swing frame and the fixed frame, the first angle adjustment mechanism is used to adjust the rotation angle of the swing frame relative to the fixed frame, and the clamping mechanism and the supporting seat are respectively arranged at intervals on the swing frame.

8. The pipe jacking construction method according to any one of claims 1 to 3, characterized in that: The machine head includes a rotary support portion, a cutter disc rotatably arranged at the front end of the rotary support portion, and a transmission rod with one end connected to the cutter disc and located in the rotary support portion, wherein the transmission rod is a screw; The power assembly includes: A jacking iron, the jacking iron being movably arranged on the working platform along the front-rear direction of the jacking equipment; A reducer, the reducer being arranged on the top iron, the output shaft of the reducer being connected to a screw sleeve, the screw sleeve being used for detachable connection with the screw of the spiral sleeve or for detachable connection with the transmission rod; a driving motor connected to the reducer; A transition pipe, the transition pipe is arranged on the top iron and sleeved on the outside of the screw sleeve, and the transition pipe is used to be detachably connected to the top pipe section of the spiral sleeve or to be detachably connected to the rotary support portion; The first fluid power cylinder is used to drive the jacking iron to move on the working platform, thereby pulling the machine head to move along the front and rear directions of the jacking equipment.

9. The pipe jacking construction method according to claim 8, characterized in that: The first crawler vehicle includes a frame, crawlers provided below the frame and on opposite sides of the frame, and a plurality of first ground-engaging legs provided on the frame, wherein the first ground-engaging legs are used to fix the first crawler vehicle relative to the ground; The rear portion of the working platform is rotatably connected to the rear portion of the vehicle frame via a third rotating shaft extending in the horizontal direction, and the front portion of the working platform is connected to the front portion of the vehicle frame via a second angle adjustment mechanism, which is used to adjust the inclination angle of the working platform on the vehicle frame; The jacking device further includes an extension frame slidably arranged on the working platform along the front-back direction of the jacking device, a third fluid power cylinder for driving the extension frame to slide, a plurality of second ground-engaging legs arranged at the front end of the extension frame, and a backrest mechanism arranged at the rear of the working platform, wherein the second ground-engaging legs are used to fix the extension frame relative to the ground; In step S1, the installation and fixation includes the following operations performed in sequence: 1) making the backrest mechanism abut against the other side wall of the tunnel; 2) making the first crawler vehicle fixed relative to the ground; 3) making the extension frame extend out of the working platform and abut against one side wall of the tunnel; 4) making the extension frame fixed relative to the ground.

10. The pipe jacking construction method according to claim 9, characterized in that: A discharge port is provided at the bottom of the transition pipe. The jacking pipe excavation construction method further includes fixing the extension frame relative to the ground, installing a hopper on the extension frame and installing a belt conveyor under the hopper, and using a screw conveying mechanism to convey the material to the discharge port, and then the material falls into the belt conveyor through the hopper, and then the material is output from the tunnel, wherein the screw conveying mechanism is composed of all the jacking pipe sections and screws.

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