A shield-pushing system and its construction method

Abstract

This disclosure relates to a shield tunneling system and its construction method. The shield tunneling system includes: a jacking device (107) for installation in the launching shaft and configured to jack pipe sections (106) during tunnel jacking construction; a rock-breaking device (101) for tunneling, located in front of the jacking device (107) along the tunnel excavation direction; and a shield tunneling extension module (104) detachably disposed between the rock-breaking device (101) and the jacking device (107), wherein the shield tunneling extension module (104) includes a plurality of propulsion cylinders (43) and a segment assembly machine (48), the plurality of propulsion cylinders (43) being configured to provide thrust for shield tunneling during shield tunneling construction, and the segment assembly machine (48) being configured to assemble shield pipe sections during shield tunneling construction.

Description

Technical Field

[0001] This invention relates to the field of tunnel construction technology, and in particular to a shield-pushing system and its construction method. Background Technology

[0002] Currently, tunnel construction methods generally include shield tunneling and pipe jacking. Pipe jacking uses a hydraulic system to propel tunnel segments forward in a working shaft. While this method is relatively fast, it is limited by friction, resulting in shorter construction distances and greater ground disturbance. Shield tunneling uses a hydraulic system to propel the main tunnel unit forward from behind, with tunnel segments assembled behind the hydraulic system. Shield tunneling has a small turning radius, allows for longer construction distances, and causes minimal ground disturbance, but it is slower. To overcome these issues, some related technologies have proposed integrated machines that combine pipe jacking and shield tunneling functions. Summary of the Invention

[0003] The inventors discovered through research that the integrated machine used in the relevant technology is expensive, has limited applicability to geological conditions, and the shield body is long and heavy, which is not conducive to tunneling construction.

[0004] The purpose of this invention is to provide a shield-pushing system and its construction method, which can improve tunneling construction.

[0005] In one aspect of this disclosure, a shield-pushing system is provided, comprising:

[0006] A jacking device is used to be installed in the starting shaft and configured to jack pipe sections during pipe jacking construction.

[0007] Rock-breaking equipment for tunneling is located in front of the jacking equipment along the tunnel excavation direction; and

[0008] The shield tunneling expansion module is detachably installed between the rock-breaking equipment and the jacking equipment.

[0009] The shield tunneling module includes multiple propulsion cylinders and a segment assembly machine. The multiple propulsion cylinders are configured to provide thrust for shield tunneling during shield tunneling, and the segment assembly machine is configured to assemble shield tunneling segments during shield tunneling.

[0010] In some embodiments, the shield-pushing system further includes:

[0011] The bearing ring seat, located between the rock-breaking equipment and the shield tunneling module, with its two ends abutting against the rock-breaking equipment and the shield tunneling module respectively, is configured to support auxiliary equipment used by the shield tunneling module to perform shield tunneling construction.

[0012] In some embodiments, the bearing ring includes a plurality of pipe jacking sections arranged sequentially along the tunnel excavation direction.

[0013] In some embodiments, the auxiliary equipment includes: a bracket disposed within the bearing ring seat and at least one of a control system, a hydraulic pump station, an air compressor, an air tank, and a grease pump disposed on the bracket.

[0014] In some embodiments, the tunnel boring machine (TBM) expansion module includes:

[0015] A first shield body, wherein the plurality of propulsion cylinders are fixedly connected to the first shield body, and the segment assembly machine is disposed within the first shield body; and

[0016] A connecting ring is located between the first shield body and the jacking device, with one end of the connecting ring connected to the jacking pipe segment pushed by the jacking device during pipe jacking construction, and the other end connected to the shield pipe segment assembled by the segment assembler during shield tunneling construction.

[0017] In some embodiments, the first shield body includes:

[0018] Front shield; and

[0019] The rear shield is sealed and plugged into the front shield;

[0020] The plurality of propulsion cylinders are fixedly connected to the front shield, and the segment assembly machine is installed inside the rear shield.

[0021] In some embodiments, the tunnel boring machine expansion module further includes:

[0022] An angle-adjusting hydraulic cylinder is hinged at both ends to the front shield and the rear shield, respectively.

[0023] In some embodiments, the front inner side of the front shield is provided with a front connecting seat, the front inner side of the rear shield is provided with a rear connecting seat, the front ends of the plurality of propulsion cylinders are connected to the front connecting seat, and the rear ends are hinged to support shoes for pressing the connecting ring or shield tunnel section.

[0024] In some embodiments, both the front connecting seat and the rear connecting seat are annular seats, and the rear connecting seat has a through hole for the propulsion cylinder to pass through.

[0025] In some embodiments, the shield tunneling expansion module further includes a plurality of angle-adjusting cylinders, the plurality of propulsion cylinders and the plurality of angle-adjusting cylinders being arranged at circumferential intervals along the first shield body; a housing is provided on the opposite side of the front connecting seat and the rear connecting seat, the front end of the angle-adjusting cylinder being hinged to the housing of the front connecting seat, and the rear end being hinged to the housing of the rear connecting seat.

[0026] In some embodiments, the housing has an arc-shaped structure, and each housing corresponds to at least two angle adjustment cylinders.

[0027] In some embodiments, the shield-pushing system further includes:

[0028] The slurry discharge pipeline has its front end located inside the rock breaking equipment and is situated behind the cutterhead along the tunnel excavation direction.

[0029] In some embodiments, the shield-pushing system further includes:

[0030] A laser guidance system is installed within the launching shaft and configured to monitor and guide the tunneling attitude of the shield propulsion system.

[0031] In one aspect of this disclosure, a method for constructing the aforementioned shield-pushing system is provided, comprising:

[0032] Step S10: Install a jacking device and the rock-breaking device at the bottom of the starting well;

[0033] Step S20: The jacking device provides propulsion to the rock-breaking device, causing the rock-breaking device to advance along the tunnel excavation direction;

[0034] Step S30: Push the shield tunneling expansion module to the rear side of the jacking device using the jacking device;

[0035] Step S40: The tunnel is constructed using the shield pushing system in both pipe jacking and shield tunneling methods for different sections.

[0036] In the pipe jacking method, the jacking device is used to place and push the pipe section behind the rock breaking equipment.

[0037] During shield tunneling, multiple propulsion cylinders of the shield expansion module provide thrust to the rock-breaking equipment for shield tunneling, and the shield tunneling segments are assembled by the segment assembly machine of the shield expansion module.

[0038] In some embodiments, between step S20 and step S30, the construction method further includes:

[0039] Step S21: Push the bearing ring seat to the rear side of the rock breaking device using the jacking device, and press it against the rock breaking device;

[0040] Step S22: Install auxiliary equipment for the shield tunneling module to perform shield tunneling construction within the bearing ring seat.

[0041] In some embodiments, between step S20 and step S30, the construction method further includes:

[0042] Step S23: The supporting ring seat of the auxiliary equipment installed for the shield tunneling module to perform shield tunneling construction is pushed to the rear side of the rock breaking equipment by the jacking device and pressed against the rock breaking equipment.

[0043] Therefore, according to the embodiments of this disclosure, the jacking equipment can achieve pipe jacking construction by jacking pipe sections in conjunction with rock breaking equipment. When it is necessary to switch construction methods, a detachable shield tunneling extension module is set between the rock breaking equipment and the jacking equipment. Thus, during shield tunneling construction, the multiple propulsion cylinders of the shield tunneling extension module provide the thrust for shield tunneling, and the segment assembly machine assembles the shield pipe sections. Therefore, it can not only carry out both pipe jacking and shield tunneling construction, but also has a smaller, lighter, and more flexible structure, and can adapt well to various geological conditions. Attached Figure Description

[0044] The accompanying drawings, which form part of this specification, illustrate embodiments of this disclosure and, together with the specification, serve to explain the principles of this disclosure.

[0045] This disclosure will become clearer with reference to the accompanying drawings and the following detailed description, wherein:

[0046] Figure 1 These are schematic diagrams of the structure of some embodiments of the shield-pushing system according to this disclosure;

[0047] Figure 2 This is a structural schematic diagram of the rock-breaking device according to an embodiment of the shield-pushing system of this disclosure;

[0048] Figure 3 This is a structural schematic diagram of the jacking device according to an embodiment of the shield-pushing system disclosed herein;

[0049] Figure 4 These are schematic diagrams of other embodiments of the shield-pushing system according to this disclosure;

[0050] Figure 5 yes Figure 4 Schematic diagram of some structures in the embodiment;

[0051] Figure 6 yes Figure 5 Schematic diagram of AA section;

[0052] Figure 7 This is a flowchart illustrating some embodiments of the construction method of the shield-pushing system according to the present disclosure.

[0053] It should be understood that the dimensions of the various parts shown in the accompanying drawings are not drawn to actual scale. Furthermore, the same or similar reference numerals denote the same or similar components.

[0054] Explanation of reference numerals in the attached figures:

[0055] 101. Rock breaking equipment; 102. Bearing ring seat; 103. Auxiliary equipment; 104. Shield tunneling expansion module; 105. Conversion ring; 106. Pipe jacking section; 107. Jacking equipment; 11. Cutterhead; 12. Main drive; 13. Slurry discharge pipeline; 14. Shield body;

[0056] 31. Control system; 32. Hydraulic pump station; 33. Support frame; 34. Air compressor; 35. Air tank; 36. Grease pump;

[0057] 41. Front connecting seat; 42. Front shield; 43. Propulsion cylinder; 44. Rear connecting seat; 45. Rear shield; 46. Housing; 47. Angle adjustment cylinder; 48. Segment assembly machine; 49. Support shoe;

[0058] 51. Shield ring seat; 52. Connecting ring;

[0059] 71. Top ring; 72. Starting support; 73. Pushing cylinder; 74. Guiding system; 75. Reaction frame. Detailed Implementation

[0060] Various exemplary embodiments of the present disclosure will now be described in detail with reference to the accompanying drawings. The descriptions of the exemplary embodiments are merely illustrative and are in no way intended to limit the present disclosure or its application or use. The present disclosure may be implemented in many different forms and is not limited to the embodiments described herein. These embodiments are provided so that the present disclosure will be thorough and complete, and will fully express the scope of the disclosure to those skilled in the art. It should be noted that, unless specifically stated otherwise, the relative arrangement of components and steps, the composition of materials, numerical expressions, and values ​​set forth in these embodiments should be interpreted as exemplary only and not as limiting.

[0061] The terms "first," "second," and similar words used in this disclosure do not indicate any order, quantity, or importance, but are merely used to distinguish different parts. Words such as "including" or "contains" mean that the element preceding the word encompasses the element listed after it, and do not exclude the possibility of encompassing other elements as well. Terms such as "above," "below," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, this relative positional relationship may also change accordingly.

[0062] In this disclosure, when a specific device is described as being located between a first device and a second device, an intermediary device may or may not be present between the specific device and the first or second device. When a specific device is described as being connected to other devices, the specific device may be directly connected to the other devices without an intermediary device, or it may be not directly connected to the other devices but have an intermediary device.

[0063] All terms used in this disclosure (including technical or scientific terms) have the same meaning as understood by one of ordinary skill in the art to which this disclosure pertains, unless otherwise specifically defined. It should also be understood that terms defined in a general dictionary, such as a dictionary, should be interpreted as having a meaning consistent with their meaning in the context of the relevant art, and not as having an idealized or highly formalized meaning, unless expressly defined herein.

[0064] Techniques, methods, and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and equipment should be considered part of the specification.

[0065] Figure 1 This is a schematic diagram of the structure of some embodiments of the shield-pushing system according to the present disclosure. Figure 2 This is a structural schematic diagram of the rock-breaking device according to an embodiment of the shield-pushing system of this disclosure. Figure 3 This is a structural schematic diagram of the jacking device according to an embodiment of the shield-pushing system of this disclosure. Figure 4 This is a schematic diagram of the structure of another embodiment of the shield-pushing system according to the present disclosure. Figure 5 yes Figure 4 A schematic diagram of some structures in the embodiment. Figure 6 yes Figure 5 A schematic diagram of the AA section.

[0066] refer to Figures 1-6 This disclosure provides a shield pushing system, including: a jacking device 107, a rock-breaking device 101 for tunneling, and a shield expansion module 104. The jacking device 107 is installed in the launching shaft and configured to jack the tunnel section 106 during pipe jacking construction.

[0067] refer to Figure 1 and Figure 3 In some embodiments, the jacking device 107 includes a top ring 71, a launching support 72, a jacking cylinder 73, and a reaction frame 75. The launching support 72 is fixed inside the launching well, and the jacking cylinder 73 is mounted on the launching support 72. During pipe jacking construction, the front end of the top ring 71 can be inserted into the rear end of the pipe section 106 closest to the jacking cylinder 73, and the rear end of the top ring 71 is connected to the jacking cylinder 73 to evenly transmit the jacking force of the jacking cylinder 73 to the pipe section 106. The reaction frame 75 is disposed between the jacking cylinder 73 and the well wall of the launching well to evenly transmit the reaction force of the jacking cylinder 73 to the well wall of the launching well.

[0068] The jacking cylinder 73 is used to provide thrust to the jacking pipe section 106 during pipe jacking construction, so that the rock breaking equipment 101 can obtain the driving force for forward excavation.

[0069] To enable attitude monitoring of the shield tunneling machine, in some embodiments, a guidance system 74, such as a laser guidance system, can be installed in the launching shaft to monitor and guide the tunneling attitude of the shield tunneling machine, thereby improving automation and construction efficiency. The working principle of the guidance system 74 is prior art and will not be described in detail here.

[0070] The rock-breaking device 101 is located in front of the jacking device 107 along the tunnel excavation direction. (Reference) Figure 1 and Figure 2 In some embodiments, the rock-breaking device 101 includes a shield body 14, with a cutterhead 11 for tunneling at its front end. A main drive 12 for rotating the cutterhead 11 is located within the shield body 14, and the main drive 12 is fixed inside the shield body 14. A slurry discharge pipe 13 for discharging the excavated material from the cutterhead 11 is also located within the shield body 14. The front end of the slurry discharge pipe 13 is located within the rock-breaking device 101 and is situated behind the cutterhead 11 along the tunnel excavation direction. The slurry discharge pipe occupies less space, which is beneficial for its arrangement within the shield-pushing system. The slurry discharge pipe 13 is a mature existing product and will not be described in detail here.

[0071] The shield tunneling module 104 is detachably disposed between the rock-breaking device 101 and the jacking device 107. The shield tunneling module 104 is disposed independently of the rock-breaking device 101, and not integrally disposed with it. The shield tunneling module 104 can be disposed at the tail of the rock-breaking device 101 or after at least one jacking section at the tail of the rock-breaking device 101. For example, in... Figure 1 In this configuration, the shield tunneling expansion module 104 is abutted or installed against the tail of the rock-breaking device 101. For example, in... Figure 4 In the middle, multiple jacking pipe sections are provided between the tail of the shield tunneling expansion module 104 and the rock breaking equipment 101. These multiple jacking pipe sections are connected in sequence to form a bearing ring seat 102.

[0072] The shield tunneling expansion module 104 can be pushed into the tunnel excavated by the rock-breaking equipment 101 by the jacking device 107. The shield tunneling expansion module 104 includes multiple propulsion cylinders 43 and a segment assembly machine 48. The multiple propulsion cylinders 43 are configured to provide thrust for shield tunneling during shield tunneling, and the segment assembly machine 48 is configured to assemble shield tunneling segments during shield tunneling.

[0073] In this embodiment, the jacking equipment can use the jacking pipe section in conjunction with the rock breaking equipment to realize the pipe jacking method construction. When it is necessary to switch construction methods, a detachable shield tunneling extension module is set between the rock breaking equipment and the jacking equipment. Thus, during shield tunneling construction, the multiple propulsion cylinders of the shield tunneling extension module provide the thrust for shield tunneling, and the segment assembly machine assembles the shield tunnel sections. Therefore, it can not only carry out both solid line pipe jacking construction and shield tunneling construction, but also has a smaller, lighter and more flexible structure, which can well adapt to various geological conditions.

[0074] refer to Figure 4 and Figure 5 In some embodiments, the shield-pushing system further includes a support ring seat 102. The support ring seat 102 is located between the rock-breaking device 101 and the shield tunneling module 104, with its two ends abutting against the rock-breaking device 101 and the shield tunneling module 104 respectively, and is configured to support auxiliary equipment 103 used by the shield tunneling module 104 to perform shield tunneling construction.

[0075] The auxiliary equipment 103 can provide support for components in the shield tunneling module 104, such as providing hydraulic oil and lubricating grease to multiple propulsion cylinders 43, and providing an air compressor to the segment assembly machine 48 to create a vacuum for lifting the segments. Placing the auxiliary equipment inside the bearing ring seat can avoid interference between the auxiliary equipment and the segment transport trolley, which is beneficial for the segment transport trolley to transport segments during shield tunneling.

[0076] In some embodiments, the bearing ring 102 may include a plurality of pipe jacking sections arranged sequentially along the tunnel excavation direction (i.e., along). The number of pipe jacking sections can be set according to the space occupied by the auxiliary equipment 103. In this way, on the one hand, there is no need to set up a shield extension module with a long axial length, reducing weight and construction difficulty; on the other hand, more or fewer pipe jacking sections can be selected to form the bearing ring 102 to accommodate auxiliary equipment 103 occupying different spaces, depending on actual needs.

[0077] refer to Figure 5 In some embodiments, the auxiliary equipment 103 includes a bracket 33 disposed within the bearing ring seat 102 and at least one of a control system 31, a hydraulic pump station 32, an air compressor 34, an air tank 35, and a grease pump 36 disposed on the bracket 33. The control system 31, hydraulic pump station 32, air compressor 34, air tank 35, and grease pump 36 can be arranged sequentially from front to back on the bracket 33. One end of the air compressor 34 is connected to the air tank 35, and the other end of the air compressor 34 is connected to the grease pump 36, so that grease is delivered to the gap between the rear shield 45 and the shield tunnel section through the grease pump 36 to play a sealing role. The hydraulic pump station 32 is the hydraulic power source for the propulsion cylinder 43 and the angle adjustment cylinder 47, and the control system 31 is used to control the opening and closing of the hydraulic pump station 32.

[0078] refer to Figure 1 , Figure 4 and Figure 5 In some embodiments, the shield tunneling expansion module 104 includes a first shield body and a connecting ring 52. The plurality of propulsion cylinders 43 are fixedly connected to the first shield body, and the segment assembly machine 48 is disposed within the first shield body.

[0079] The first shield provides support and sealing, and is used to install and accommodate other components. In some embodiments, the first shield includes a front shield 42 and a rear shield 45. The rear shield 45 is sealed to the front shield 42 to prevent water and soil from flowing into the front shield 42 and the rear shield 45. The plurality of propulsion cylinders 43 are fixedly connected to the front shield 42 and provide propulsion force to move the front shield 42 forward during shield tunneling. The segment assembly machine 48 is disposed within the rear shield 45 and assembles the shield tunnel segments during shield tunneling.

[0080] The connecting ring 52 is located between the first shield body and the jacking device 107, with one end connected to the jacking pipe section 106 pushed by the jacking device 107 during pipe jacking construction, and the other end connected to the shield tunnel section 51 assembled by the segment assembler 48 during shield tunneling construction. Figure 1 In the middle, multiple shield tunnel sections 51 and connecting ring 52 located between the connecting ring 52 and the first shield body form a transition ring 105.

[0081] The connecting ring 52 has sockets at both its front and rear ends. The outer diameter of the shield tunnel segment 51 can be smaller than the outer diameter of the jacking pipe segment 106. Correspondingly, the inner diameter of the socket at the front end of the connecting ring 52 is smaller than the inner diameter of the socket at the rear end. The socket at the front end of the connecting ring 52 connects to the rear end of the last shield tunnel segment, and the socket at the rear end of the connecting ring 52 connects to the front end of the first jacking pipe segment 106. The segment assembly machine 48 is used to assemble the shield tunnel segments into shield tunnel segment 51. In other embodiments, the transition ring can be the transition ring disclosed in application publication number CN112377199A.

[0082] refer to Figure 5 and Figure 6 In some embodiments, the shield tunneling module 104 further includes an angle-adjusting cylinder 47. The two ends of the angle-adjusting cylinder 47 are hinged to the front shield 42 and the rear shield 45, respectively. The angle between the rear shield 45 and the front shield 42 can be adjusted by extending and retracting the angle-adjusting cylinder 47, enabling turning during the tunneling process.

[0083] As needed, multiple sets of angle-adjusting cylinders 47 can be set and arranged at different positions around the circumference of the first shield. If the tunnel is designed with a small turning radius, the angle-adjusting cylinders 47 can be controlled in groups to achieve left, right, up, and down adjustment. For example, to turn to the left, simply control the upper right and lower right angle-adjusting cylinders 47 to extend simultaneously, while keeping the upper left and lower left angle-adjusting cylinders 47 inactive.

[0084] The angle adjusting cylinder 47 can also cooperate with the jacking cylinder 73 to achieve segmented jacking. For example, when the thrust of the jacking cylinder 73 of the jacking device 107 reaches 40%-60% of the designed thrust of the angle adjusting cylinder 47 of the shield tunneling module 104, the jacking cylinder 73 retracts; the shield tunneling module 104 is placed at the bottom of the starting shaft, the jacking cylinder 73 is activated, and the shield tunneling module 104 is pushed into the tunnel. Then, the jacking pipe section 106 is placed behind the shield tunneling module 104 to continue forward excavation. When the thrust of the jacking cylinder 73 reaches 70%-80% of the designed thrust of the angle adjusting cylinder 47, the jacking cylinder 73 locks, and the angle adjusting cylinder 47 is activated to push the rock breaking device 101 forward. When the angle adjusting cylinder 47 reaches its maximum stroke, the jacking cylinder 73 is activated, and its stroke is consistent with that of the angle adjusting cylinder 47. At this time, the angle adjusting cylinder 47 retracts accordingly, and the jacking is repeated until the designed distance for pipe jacking construction is reached.

[0085] exist Figure 5 and Figure 6 In this structure, the front shield 42 has a front connecting seat 41 on its inner front side, and the rear shield 45 has a rear connecting seat 44 on its inner front side. The front ends of the plurality of propulsion cylinders 43 are connected to the front connecting seat 41, and the rear ends are hinged to support shoes 49 for pressing the connecting ring 52 or shield tunnel sections. Because the support shoes are hinged to the rear ends of the propulsion cylinders, the propulsion cylinders can adapt to the angle adjustment of the angle adjustment cylinder 47.

[0086] In some embodiments, both the front connecting seat 41 and the rear connecting seat 44 are annular seats, with the rear connecting seat 44 having a through hole for the propulsion cylinder 43 to pass through. This structure facilitates the arrangement of the front and rear connecting seats and ensures the strength of both connecting seats. In other embodiments, the front and rear connecting seats are independent connecting seats; that is, multiple front connecting seats are arranged at intervals along the circumference of the front shield, with the number of front connecting seats being the same as the number of propulsion cylinders and angle adjustment cylinders; and multiple rear connecting seats are arranged at intervals along the circumference of the rear shield, with the number of rear connecting seats being the same as the number of propulsion cylinders and angle adjustment cylinders.

[0087] In the embodiment where the shield tunneling expansion module 104 includes multiple angle-adjusting cylinders 47, the multiple propulsion cylinders 43 and the multiple angle-adjusting cylinders 47 are arranged at intervals along the circumference of the first shield body. This allows the propulsion cylinders and angle-adjusting cylinders to have a section of overlapping length in the tunnel excavation direction, which can reduce the axial length of the shield tunneling expansion module 104, thereby reducing the weight of the shield tunneling expansion module 104 and facilitating tunneling construction.

[0088] The front connecting seat 41 and the rear connecting seat 44 are respectively provided with housings 46 on opposite sides. The front end of the angle adjusting cylinder 47 is hinged to the housing 46 of the front connecting seat 41, and the rear end is hinged to the housing 46 of the rear connecting seat 44. By providing housings on opposite sides of the front and rear connecting seats, the force distribution during the adjustment process can be optimized.

[0089] Furthermore, the housing 46 has an arc-shaped structure, and each housing 46 corresponds to at least two angle-adjusting cylinders 47. This facilitates the arrangement of the housings and ensures their strength. For example, each housing corresponds to three angle-adjusting cylinders. In other embodiments, when the housing has an arc-shaped structure, each housing corresponds to one angle-adjusting cylinder. In other embodiments, the housing can be a rectangular structure, or each housing can correspond to two or more angle-adjusting cylinders.

[0090] In the above embodiments, both the front shield 42 and the rear shield 45 can be circular shields. The aforementioned propulsion cylinders 43 can be provided at the top, bottom, left, and right sides of the front shield 42 and the rear shield 45 to ensure uniform force during propulsion. Preferably, three propulsion cylinders 43 are provided at the top and bottom respectively, and one propulsion cylinder 43 is provided at the left and right sides respectively. The aforementioned angle adjustment cylinders 47 can be provided between the top and left sides, between the left and bottom sides, between the bottom and right sides, and between the right and top sides of the front shield 42 and the rear shield 45 to achieve upward, downward, leftward, and rightward turning.

[0091] In some embodiments, where both the front and rear shields are circular, propulsion cylinders may only be provided at the top and bottom of the front and rear shields. In other embodiments, the front and circular shields may be rectangular shields, or propulsion cylinders may only be provided on the left and right sides of the front and rear shields. In still other embodiments, angle adjustment cylinders may only be provided between the top and left sides, and between the left and bottom sides of the front and rear shields, enabling only right turns. In other embodiments, angle adjustment cylinders may only be provided between the bottom and right sides, and between the right and top sides of the front and rear shields, enabling only left turns.

[0092] In the above embodiments, both the shield tunneling section and the jacking tunneling section can be circular. In other embodiments, the shield tunneling section and the jacking tunneling section can be horseshoe-shaped, rectangular, or rectangular-like.

[0093] Figure 7 This is a flowchart illustrating some embodiments of the construction method for the shield-pushing system according to this disclosure. Refer to the foregoing embodiments of the shield-pushing system and... Figures 1-7 This disclosure provides a construction method for the aforementioned shield-pushing system, including steps S10 to S40.

[0094] In step S10, a jacking device 107 and a rock-breaking device 101 are installed at the bottom of the starting well.

[0095] In step S20, the jacking device 107 provides propulsion to the rock breaking device 101, causing the rock breaking device 101 to advance forward along the tunnel excavation direction;

[0096] In step S30, the shield tunneling expansion module 104 is pushed to the rear side of the jacking device 107 by the jacking device 107.

[0097] In step S40, the tunnel is constructed using the shield-pushing system with both pipe jacking and shield tunneling methods for different sections.

[0098] During pipe jacking construction, the jacking device 107 is used to place and push the pipe section 106 behind the rock breaking device 101. Pipe jacking construction can be performed before step S30, i.e., without placing the shield expansion module 104; or it can be performed after step S30, i.e., with the shield expansion module 104 in place.

[0099] During shield tunneling, the multiple propulsion cylinders 43 of the shield expansion module 104 provide thrust to the rock-breaking equipment 101 for shield tunneling, and the segment assembly machine 48 of the shield expansion module 104 assembles the shield tunneling segments. At this time, the jacking action of the jacking device 107 on the jacking segment 106 can provide the reaction force for shield tunneling, or the friction between the jacking segment 106 and the tunnel can be used to provide the reaction force for shield tunneling.

[0100] In some embodiments of the aforementioned shield-pushing system, the system further includes a bearing ring seat 102 located between the rock-breaking device 101 and the shield tunneling module 104. Correspondingly, in some embodiments, between steps S20 and S30, the construction method further includes: step S21, pushing the bearing ring seat 102 to the rear side of the rock-breaking device 101 using the jacking device 107, and abutting against the rock-breaking device 101; step S22, installing auxiliary equipment 103 for the shield tunneling module 104 to perform shield tunneling construction within the bearing ring seat 102. This method first forms the bearing ring seat 102, and then installs the auxiliary equipment 103 within it. The bearing ring seat 102 can be formed by sequentially inserting and pushing multiple jacking pipe sections to the rear side of the rock-breaking device 101. This method is applicable to larger-sized auxiliary equipment 103.

[0101] In some embodiments, between steps S20 and S30, the construction method further includes: step S23, whereby the jacking device 107 pushes the bearing ring seat 102 of the auxiliary equipment 103, which is installed for the shield tunneling module 104 to perform shield tunneling construction, to the rear side of the rock-breaking device 101 and abuts against the rock-breaking device 101. This method, which first installs the auxiliary equipment 103 into the bearing ring seat 102 and then places and pushes it to the rear side of the rock-breaking device 101, is relatively convenient to operate and suitable for smaller-sized auxiliary equipment 103.

[0102] The embodiments of this disclosure have now been described in detail. To avoid obscuring the concept of this disclosure, some details known in the art have not been described. Those skilled in the art can fully understand how to implement the technical solutions disclosed herein based on the above description.

[0103] While specific embodiments of this disclosure have been described in detail by way of examples, those skilled in the art should understand that the examples are for illustrative purposes only and not intended to limit the scope of this disclosure. Those skilled in the art should understand that modifications can be made to the above embodiments or equivalent substitutions can be made to some technical features without departing from the scope and spirit of this disclosure. The scope of this disclosure is defined by the appended claims.

Claims

1. A push shield system characterized by, The application relates to a tunneling device, comprising: a pushing device (107) arranged in a starting well and configured to push a pipe section (106) in pipe jacking construction; a rock breaking device (101) for tunneling, arranged in front of the pushing device (107) along a tunneling direction; and a shield extension module (104) detachably arranged between the rock breaking device (101) and the pushing device (107), wherein the shield extension module (104) comprises a plurality of pushing cylinders (43) configured to provide a pushing force for shield tunneling in shield construction and a segment erector (48) configured to erect a shield section in shield construction; the shield extension module (104) comprises a first shield body, a connecting ring (52) and an angle adjusting cylinder (47), the plurality of pushing cylinders (43) are fixedly connected with the first shield body, and the segment erector (48) is arranged in the first shield body; the connecting ring (52) is arranged between the first shield body and the pushing device (107), one end of the connecting ring (52) is connected with the pipe section (106) pushed by the pushing device (107) in pipe jacking construction, and the other end of the connecting ring (52) is connected with a shield section erected by the segment erector (48) in shield construction. The first shield body comprises a front shield (42) and a rear shield (45) sealingly connected with the front shield (42), the plurality of pushing cylinders (43) are fixedly connected with the front shield (42), the segment erector (48) is arranged in the rear shield (45), and two ends of the angle adjusting cylinder (47) are hingedly connected with the front shield (42) and the rear shield (45) respectively; an inner side of a front part of the front shield (42) is provided with a front connecting seat (41), an inner side of a front part of the rear shield (45) is provided with a rear connecting seat (44), front ends of the plurality of pushing cylinders (43) are connected with the front connecting seat (41), and rear ends of the plurality of pushing cylinders (43) are hingedly connected with a supporting shoe (49) used for pressing the connecting ring (52) or the shield section. The application further relates to a tunneling device, comprising:

2. The push shield system of claim 1, wherein, a load ring seat (102) arranged between the rock breaking device (101) and the shield extension module (104). Two ends of the load ring seat (102) abut against the rock breaking device (101) and the shield extension module (104) respectively, and the load ring seat (102) is configured to carry auxiliary equipment (103) used for the shield extension module (104) to perform shield construction.

3. The push shield system of claim 2, wherein, The load ring seat (102) comprises a plurality of pipe sections arranged in sequence along the tunneling direction.

4. The push shield system of claim 2, wherein, The auxiliary equipment (103) comprises a support (33) arranged in the load ring seat (102) and at least one of a control system (31), a hydraulic pump station (32), an air compressor (34), a gas tank (35) and a grease pump (36) arranged on the support (33).

5. The push shield system of claim 3, wherein, The front connecting seat (41) and the rear connecting seat (44) are both annular seats.

6. The push shield system of claim 1, wherein, The rear connecting seat (44) has a perforation through which the pushing cylinder (43) passes.

7. A push shield system according to claim 1 or 6, characterized in that ​ 8. The push shield system of claim 1, wherein, The shield extension module (104) further comprises a plurality of angle adjustment oil cylinders (47), and the plurality of propulsion oil cylinders (43) and the plurality of angle adjustment oil cylinders (47) are arranged at intervals along the circumference of the first shield body.

9. A push shield system according to claim 1 or 8, characterized in that Box bodies (46) are arranged on opposite sides of the front connecting seat (41) and the rear connecting seat (44) respectively, the front ends of the angle adjustment oil cylinders (47) are hinged to the box bodies (46) of the front connecting seat (41), and the rear ends of the angle adjustment oil cylinders (47) are hinged to the box bodies (46) of the rear connecting seat (44).

10. The push shield system of claim 9, wherein, The box bodies (46) are arc-shaped structures, and each box body (46) corresponds to at least two angle adjustment oil cylinders (47).

11. The push shield system of claim 1, wherein, Further comprising: A slurry discharge pipeline (13) is arranged in the rock breaking device (101) at the front end and located at the rear side of the cutter head (11) of the rock breaking device (101) in the tunneling direction.

12. The push shield system of claim 1, wherein, Further comprising: A laser guide system is arranged in the starting shaft and is configured to monitor and guide the tunneling posture of the shield pushing system.

13. A construction method based on the push shield system according to any one of claims 1 to 12, characterized in that, Including: Step S10, arranging a pushing device (107) and the rock breaking device (101) at the bottom of the starting shaft; Step S20, providing a propulsion force to the rock breaking device (101) through the pushing device (107) to make the rock breaking device (101) tunnel forward in the tunneling direction; Step S30, pushing the shield extension module (104) to the rear side of the pushing device (107) through the pushing device (107); Step S40, respectively constructing different sections of the tunnel by pipe jacking and shield method through the shield pushing system; When pipe jacking is constructed, the pipe jacking device (106) is put into and pushed by the pushing device (107) at the rear side of the rock breaking device (101); When shield method is constructed, the shield tunneling propulsion force is provided to the rock breaking device (101) through the plurality of propulsion oil cylinders (43) of the shield extension module (104), and the shield pipe section is assembled through the segment erector (48) of the shield extension module (104).

14. The construction method according to claim 13, characterized in that, Between the step S20 and the step S30, the construction method further comprises: Step S21, pushing the load ring seat (102) to the rear side of the rock breaking device (101) and abutting against the rock breaking device (101) through the pushing device (107); Step S22, installing auxiliary equipment (103) for the shield extension module (104) to perform shield method construction in the load ring seat (102).

15. The construction method according to claim 13, characterized in that, Between the step S20 and the step S30, the construction method further comprises: Step S23, pushing the load ring seat (102) on which the auxiliary equipment (103) for the shield extension module (104) to perform shield method construction has been installed to the rear side of the rock breaking device (101) and abutting against the rock breaking device (101) through the pushing device (107).

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