Pipe jacking and shield all-in-one machine

Abstract

The invention provides a pipe-jacking shield all-in-one machine, and relates to the technical field of tunneling construction, the pipe-jacking shield all-in-one machine comprises a pushing mechanism arranged in a working well, and the pushing mechanism is configured to provide pushing force for pipe-jacking tunneling by pushing pipe-jacking pipe joints during pipe-jacking mode construction; the rock breaking mechanism comprises a cutterhead and a driving assembly, the cutterhead is located in front of the pushing mechanism in the tunneling direction of the tunnel, and the driving end of the driving assembly is connected with the cutterhead so as to drive the cutterhead to rotate; and the shield auxiliary mechanism is arranged between the rock breaking mechanism and the pushing mechanism, the shield auxiliary mechanism comprises a shield propelling assembly and a segment erector, the shield propelling assembly is configured to provide shield tunneling thrust during shield mode construction, and the segment erector is configured to assemble shield pipe joints during shield mode construction. According to the pipe jacking and shield tunneling all-in-one machine, normal tunneling can be conducted in the pipe jacking pipe joint assembling process.

Description

Technical Field

[0001] This application relates to the technical field of tunnel boring construction, and particularly to a pipe jacking and shield tunneling integrated machine. Background Art

[0002] Tunnel excavation refers to the process of using rotary cutters equipped on a tunnel boring machine to excavate, breaking the surrounding rock in the tunnel for tunneling, thereby forming the entire tunnel cross-section. The methods of tunnel excavation include the pipe jacking method and the shield tunneling method. Among them, the pipe jacking method has become the primary choice for tunnel excavation due to its advantages such as small construction area. When a small-radius turn is required for the tunnel, the shield tunneling method will be switched to.

[0003] In the existing technology using the pipe jacking method, first, a jacking device needs to be arranged in the working shaft. With the jacking force generated by the jacking device, while providing thrust for the tunneling of the tunnel boring machine, a section of pipe jacking segment is jacked into the excavated tunnel. After the pipe jacking segment is completely inserted, the next section of pipe jacking segment is assembled in the working shaft, and the cycle of jacking is carried out.

[0004] However, during the assembly process of the pipe jacking segments, the tunnel boring machine cannot carry out tunneling, resulting in low tunnel construction efficiency. Summary of the Invention

[0005] In view of this, this application provides a pipe jacking and shield tunneling integrated machine, which can carry out normal tunneling during the assembly process of the pipe jacking segments.

[0006] To achieve the above object, a pipe jacking and shield tunneling integrated machine provided by this application adopts the following technical solutions:

[0007] This application provides a pipe jacking and shield tunneling integrated machine for tunnel construction, including a jacking mechanism arranged in a working shaft. The jacking mechanism is configured to provide the thrust for pipe jacking tunneling by jacking the pipe jacking segments during pipe jacking mode construction. The pipe jacking and shield tunneling integrated machine also includes a rock breaking mechanism and a shield auxiliary mechanism;

[0008] The rock breaking mechanism includes a cutter head and a driving component. The cutter head is located in front of the jacking mechanism along the tunnel tunneling direction, and the driving end of the driving component is connected to the cutter head to drive the cutter head to rotate;

[0009] The shield auxiliary mechanism is arranged between the rock breaking mechanism and the jacking mechanism, and the shield auxiliary mechanism includes a shield propulsion component and a segment erector. The shield propulsion component is configured to provide the thrust for shield tunneling during shield mode construction, and the segment erector is configured to assemble shield segments during shield mode construction.

[0010] In a possible implementation, the shield propulsion component includes propulsion cylinders and a tightening component;

[0011] The tightening assembly is located between the propulsion oil cylinder and the jacking mechanism, and one end of the tightening assembly abuts against the propulsion oil cylinder, while the other end is connected to the shield segment assembled by the segment erector during shield tunneling construction.

[0012] In a possible implementation, the tightening assembly includes a tightening ring and a tightening oil cylinder;

[0013] The tightening ring includes a guiding portion and at least two symmetrically distributed tightening plates. Each tightening plate can move telescopically relative to the guiding portion to press against or separate from the tunnel wall;

[0014] The tightening oil cylinder is disposed within the tightening ring to drive the movement of each tightening plate.

[0015] In a possible implementation, the tightening assembly further includes a connecting block;

[0016] The connecting block is located between the end of the tightening oil cylinder and the tightening plate. One end of the connecting block is connected to the tightening oil cylinder, and the other end is detachably connected to the tightening plate through a first connecting member.

[0017] In a possible implementation, the tightening assembly further includes a sealing member;

[0018] The sealing member is located between the guiding portion and the tightening plate.

[0019] In a possible implementation, a groove is formed on the end face of the guiding portion facing the tightening plate to accommodate the sealing member.

[0020] In a possible implementation, the guiding portion includes a plurality of arc-shaped plates that are sequentially connected. Among them, the arc-shaped plate located at the top of the tightening ring is tapered and becomes thinner away from the center of the tightening ring.

[0021] In a possible implementation, the shield auxiliary mechanism further includes a shield body and a connecting ring;

[0022] Both the propulsion oil cylinder and the segment erector are disposed within the shield body;

[0023] The connecting ring is located between the shield body and the jacking equipment. One end of the connecting ring is connected to the jacking pipe section jacked by the jacking mechanism during pipe jacking construction, and the other end is connected to the shield segment assembled by the segment erector during shield tunneling construction.

[0024] In a possible implementation, the shield body includes a front shield, a middle shield, and a rear shield that are sequentially connected. Among them, the middle shield is hermetically inserted into the rear shield;

[0025] The propulsion cylinder and the segment assembling machine are both arranged in the middle shield.

[0026] In a possible implementation, the shield auxiliary mechanism further includes an adjustment component;

[0027] The adjustment assembly comprises a plurality of adjustment oil cylinders, and two ends of each of the adjustment oil cylinders are rotatably connected to the front shield and the middle shield respectively.

[0028] The present application provides a jacking shield integrated machine, comprising a jacking mechanism, a rock breaking mechanism and a shield auxiliary mechanism, wherein the rock breaking mechanism comprises a cutter head and a drive assembly, and the shield auxiliary mechanism comprises a shield propulsion assembly and a segment assembler.

[0029] When the jacking pipe mode is selected for tunnel construction, the jacking mechanism arranged in the working shaft provides thrust for the excavation of the rock breaking mechanism by pushing the jacking pipe section, and at the same time pushes a jacking pipe section into the excavated tunnel; when the jacking pipe section is completely entered and the next jacking pipe section needs to be assembled in the working shaft, it is switched to the shield mode, and the shield auxiliary mechanism provides thrust for the excavation of the rock breaking mechanism, and the segment assembler assembles shield pipe sections for the excavated tunnel wall to support it; after the next jacking pipe section is assembled, it is switched to the jacking pipe mode again, and this cycle is repeated to complete the tunnel excavation operation.

[0030] Therefore, by setting up a shield auxiliary mechanism, the jacking pipe shield machine can realize free switching between the jacking pipe mode and the shield mode. It not only has the advantages of the jacking pipe mode such as the small construction area occupied, but also can switch to the shield mode during the assembly of the next jacking pipe section to maintain normal excavation, thereby improving the efficiency of tunnel construction. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation methods described here are only used to illustrate and explain the present application, and the present application is not limited to the specific implementation methods described below.

[0032] Figure 1 A schematic diagram of the structure of a pipe jacking shield integrated machine provided in an embodiment of the present application;

[0033] Figure 2 for Figure 1 Schematic diagram of the structure of the middle support assembly in the pipe jacking mode;

[0034] Figure 3 for Figure 1 Schematic diagram of the structure of the middle bracing assembly in shield mode;

[0035] Figure 4 for Figure 1 A side view of the middle connecting ring;

[0036] Figure 5 For Figure 1 The front view of the connecting ring in

[0037] Explanation of reference numerals in the drawings:

[0038] 100 - Cutter head;

[0039] 200 - Driving assembly;

[0040] 300 - Thrust cylinder;

[0041] 400 - Tightening assembly;

[0042] 410 - Tightening ring;

[0043] 411 - Guide part;

[0044] 411a - Groove; 411b - Arc plate;

[0045] 412 - Tightening plate;

[0046] 420 - Tightening cylinder;

[0047] 430 - Connecting block;

[0048] 431 - First connecting piece;

[0049] 440 - Seal;

[0050] 500 - Segment erector;

[0051] 600 - Shield body;

[0052] 610 - Front shield; 620 - Middle shield; 630 - Rear shield;

[0053] 700 - Connecting ring;

[0054] 800 - Adjusting assembly;

[0055] 810 - Adjusting cylinder.

[0056] Through the above-mentioned drawings, specific embodiments of the present application have been shown, and there will be more detailed descriptions hereinafter. These drawings and textual descriptions are not intended to limit the scope of the concept of the present application in any way, but to illustrate the concept of the present application to those skilled in the art by referring to specific embodiments. Specific embodiments

[0057] To make the objectives, technical solutions, and advantages of this application clearer, the following will clearly and completely describe the technical solutions in this application and how these technical solutions solve the above-mentioned technical problems by using specific embodiments in combination with the accompanying drawings in this application. Obviously, the described embodiments are some, but not all, of the embodiments of this application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in this application without creative efforts shall fall within the scope of protection of this application.

[0058] In the description of this application, it should be noted that unless otherwise clearly defined and limited, the terms "installed", "connected", and "coupled" should be understood in a broad sense. For example, it can be a fixed connection, or an indirect connection through an intermediate medium, or the communication inside two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0059] In the description of this application, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing this application and simplifying the description, rather than indicating or implying that the device or component referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to this application.

[0060] The terms "first", "second", "third", "fourth", etc. (if any) in the description, claims, and above-mentioned accompanying drawings of this application are used to distinguish similar objects and do not necessarily need to describe a specific order or sequence. It should be understood that such used data can be interchanged under appropriate circumstances so that the embodiments of this application described here can be implemented in an order different from those illustrated or described here.

[0061] In the embodiments of this application, words such as "exemplary" or "for example" are used to represent examples, illustrations, or explanations. Any embodiment or design solution described as "exemplary" or "for example" in this application should not be construed as being more preferred or having more advantages than other embodiments or design solutions. Rather, using words such as "exemplary" or "for example" is intended to present relevant concepts in a specific manner.

[0062] In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or device that includes a series of steps or units does not necessarily have to be limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or are inherent to these processes, methods, products, or devices.

[0063] Tunnel excavation refers to the process of using the rotary cutters equipped on the tunnel boring machine to excavate, and tunneling by crushing the surrounding rock in the tunnel, thereby forming the entire tunnel section. The methods of tunnel excavation include pipe jacking method and shield method. Among them, the pipe jacking method has become the primary choice for tunnel excavation due to its advantages such as small construction area occupation. When the tunnel needs to turn with a small radius, the shield method will be switched to.

[0064] In the existing technology, when the pipe jacking method is adopted, first, the jacking equipment needs to be arranged in the working shaft. With the jacking force generated by the jacking equipment, while providing thrust for the tunneling of the tunnel boring machine, a section of pipe jacking segment is jacked into the excavated tunnel. After the pipe jacking segment is completely inserted, the next section of pipe jacking segment is assembled in the working shaft, and the cycle of jacking is carried out.

[0065] However, during the assembly process of the pipe jacking segments, the tunnel boring machine cannot carry out tunneling, resulting in low tunnel construction efficiency.

[0066] Based on this, a pipe jacking - shield integrated machine provided in this application includes a jacking mechanism, a rock - breaking mechanism, and a shield auxiliary mechanism. The rock - breaking mechanism includes a cutter head and a driving component, and the shield auxiliary mechanism includes a shield propulsion component and a segment erector.

[0067] When the pipe jacking mode is selected for tunnel construction, the jacking mechanism arranged in the working shaft jacks the pipe jacking segment to provide thrust for the tunneling of the rock - breaking mechanism, and at the same time jacks a section of pipe jacking segment into the excavated tunnel. When the pipe jacking segment is completely inserted and the next section of pipe jacking segment needs to be assembled in the working shaft, it is switched to the shield mode. It is then the shield auxiliary mechanism that provides thrust for the tunneling of the rock - breaking mechanism, and the segment erector assembles shield segments for the support of the excavated tunnel wall. After the next section of pipe jacking segment is assembled, it is switched back to the pipe jacking mode, and so on, thus completing the tunnel excavation operation.

[0068] Thus, by setting the shield auxiliary mechanism, the pipe jacking - shield integrated machine can realize the free switching between the pipe jacking mode and the shield mode. It not only has the advantages of small construction area occupation brought by the pipe jacking mode, but also, during the process of assembling the next section of pipe jacking segment, it can always maintain normal tunneling by switching to the shield mode, thereby improving the efficiency of tunnel construction.

[0069] The technical solution of this application will be described in detail below with specific embodiments in conjunction with the accompanying drawings. These specific embodiments can be combined with each other, and the same or similar concepts or processes may not be repeated in some embodiments.

[0070] A pipe jacking and shield integrated machine provided by an embodiment of the present application is used for tunnel construction, and includes a jacking mechanism disposed in a working shaft. The jacking mechanism is configured to provide the thrust for pipe jacking tunneling by jacking a pipe jacking segment during pipe jacking mode construction.

[0071] Referring Figure 1 As shown, the pipe jacking and shield integrated machine further includes a rock breaking mechanism and a shield auxiliary mechanism; the rock breaking mechanism includes a cutter head 100 and a driving assembly 200. The cutter head 100 is located in front of the jacking mechanism along the tunnel tunneling direction. The driving end of the driving assembly 200 is connected to the cutter head 100 to drive the cutter head 100 to rotate; the shield auxiliary mechanism is disposed between the rock breaking mechanism and the jacking mechanism, and the shield auxiliary mechanism includes a shield propulsion assembly and a segment erector 500. The shield propulsion assembly is configured to provide the thrust for shield tunneling during shield mode construction, and the segment erector 500 is configured to assemble shield segments during shield mode construction.

[0072] In the present application, when the pipe jacking mode is selected for tunnel construction, the jacking mechanism disposed in the working shaft provides the thrust for the tunneling of the rock breaking mechanism by jacking the pipe jacking segment, and at the same time jacks a pipe jacking segment into the excavated tunnel; when the pipe jacking segment is completely inserted and the next pipe jacking segment needs to be assembled in the working shaft, switch to the shield mode, and it is changed to the shield auxiliary mechanism to provide the thrust for the tunneling of the rock breaking mechanism, and the segment erector 500 assembles shield segments for the support of the excavated tunnel wall; after the next pipe jacking segment is assembled, switch to the pipe jacking mode again, and so on, thereby completing the tunnel excavation operation.

[0073] Thus, by providing the shield auxiliary mechanism, the pipe jacking and shield integrated machine can realize the free switching between the pipe jacking mode and the shield mode, not only having the advantages such as small construction occupation area brought by the pipe jacking mode, but also, during the process of assembling the next pipe jacking segment, it can always maintain normal tunneling by switching to the shield mode, thereby improving the efficiency of tunnel construction.

[0074] In some embodiments, the shield propulsion assembly includes propulsion cylinders 300 and a tightening assembly 400; the tightening assembly 400 is located between the propulsion cylinders 300 and the jacking mechanism, and one end of the tightening assembly 400 abuts against the propulsion cylinders 300, and the other end is connected to the shield segment assembled by the segment erector 500 during shield mode construction.

[0075] In the above embodiment, the propulsion cylinders 300 are provided to provide the thrust for the tunneling of the rock breaking mechanism during shield mode construction; and the tightening assembly 400 is provided to abut against the inner wall of the tunnel to provide the support reaction force for the tunneling of the rock breaking mechanism, preventing the whole pipe jacking and shield integrated machine from slipping in the direction away from the cutter head 100 when the propulsion cylinders 300 operate, resulting in the rock breaking mechanism being unable to tunnel normally.

[0076] Further, see Figures 1 to 3 As shown, in some embodiments, the tightening assembly includes a tightening ring 410 and a tightening cylinder 420; the tightening ring 410 includes a guide portion 411 and at least two symmetrically distributed tightening plates 412, and each tightening plate 412 can perform telescopic movement relative to the guide portion 411 to press against or separate from the tunnel wall; the tightening cylinder 420 is disposed in the tightening ring 410 to drive each tightening plate 412 to move.

[0077] It is understandable that in the present application, there is no limitation on the number and arrangement of the tensioning plates 412, which can be set to multiple. In the present embodiment, the number of tensioning plates 412 is set to two, and they are symmetrically distributed. The two tensioning plates 412 can evenly bear the force from the tunnel wall from both sides, preventing the overall lateral tilt of the jacking shield machine, thereby ensuring that the rock breaking mechanism can excavate in the correct direction.

[0078] At the same time, the tightening cylinder 420 is used as the power source for the telescopic movement of each tightening plate 412 relative to the guide part 411. The cylinder drive has the characteristics of smooth operation and compact structure, which can avoid rigid collision between the tightening plate 412 and the tunnel wall, and there is no need to reserve a large layout space for it.

[0079] Furthermore, in some embodiments, the tightening assembly 400 also includes a connecting block 430; the connecting block 430 is located between the end of the tightening cylinder 420 and the tightening plate 412, and one end of the connecting block 430 is connected to the tightening cylinder 420, and the other end is detachably connected to the tightening plate 412 through a first connecting member 431.

[0080] Since the driving end of the tightening oil cylinder 420 is arranged in a plane, and the tightening plate 412 is arranged in an arc shape to better cooperate with the tunnel wall support, this results in that the contact surface of the driving end of the tightening oil cylinder 420 and the tightening plate 412 are too small and cannot fit tightly when they are connected. Therefore, in this embodiment, the connecting block 430 is used as a bridge between the driving end of the tightening oil cylinder 420 and the tightening plate 412 to increase the contact surface and reduce the pressure per unit area on the contact surface, thereby extending the service life of the tightening oil cylinder 420 and the tightening plate 412.

[0081] In some embodiments, the tightening assembly 400 further includes a seal 440 ; the seal 440 is located between the guide portion 411 and the tightening plate 412 .

[0082] In the above embodiment, a seal 440 is added between the guide portion 411 and the tightening plate 412 to enhance the sealing between the guide portion 411 and the tightening plate 412, thereby preventing splashing sand and stones from entering the tightening assembly 400 during tunnel construction in the jacking mode, causing it to be unable to operate normally.

[0083] Meanwhile, in the present application, there are no restrictions on the shape and material of the seal 440, as long as a good sealing performance is ensured between the guiding portion 411 and the tightening plate 412.

[0084] Further, in some embodiments, a groove 411a is formed on the end face of the guiding portion 411 facing the tightening plate 412 to accommodate the seal 440.

[0085] In the above embodiments, the seal 440 is accommodated in the groove 411a to prevent a gap from being left between the guiding portion 411 and the tightening plate 412 due to the volume of the seal 440 itself, thereby reducing the sealing performance of the tightening assembly 400.

[0086] In some embodiments, the guiding portion 411 includes a plurality of arc-shaped plates 411b, and the arc-shaped plates 411b are connected in sequence. Among them, the arc-shaped plate 411b located at the top of the tightening ring 410 is tapered and thins away from the center of the tightening ring 410.

[0087] Here, the guiding portion 411 is split into a plurality of arc-shaped plates 411b connected together. At the same time, the arc-shaped plate 411b located at the top of the tightening ring 410 adopts a special design, aiming to enable the segment erector 500 to perform disassembly and assembly operations on it without the need to set up other disassembly and assembly equipment, making the overall structure of the pipe-jacking shield machine more compact.

[0088] Referring to Figures 1 to 5 As shown, in some embodiments, the shield auxiliary mechanism further includes a shield body 600 and a connecting ring 700; the propulsion cylinders 300 and the segment erector 500 are both arranged inside the shield body 600; the connecting ring 700 is located between the shield body 600 and the jacking equipment, and one end of the connecting ring 700 is connected to the pipe-jacking pipe segment jacked by the jacking mechanism during pipe-jacking mode construction, and the other end is connected to the shield pipe segment assembled by the segment erector 500 during shield mode construction.

[0089] In the above embodiments, the shield body 600 can provide support and sealing functions, and it is used to install and accommodate other components, such as the propulsion cylinders 300 and the segment erector 500; when the connecting ring 700 is provided, in specific implementation, socket joints are respectively designed at the front end and the rear end of the connecting ring 700. Since the outer diameter of the shield pipe segment is generally smaller than that of the pipe-jacking pipe segment, accordingly, the inner diameter of the socket joint at the front end of the connecting ring 700 is smaller than that of the socket joint at the rear end. The socket joint at the front end of the connecting ring 700 is connected to the rear end of the last shield pipe segment, and the socket joint at the rear end of the connecting ring 700 is connected to the front end of the frontmost pipe-jacking pipe segment.

[0090] Further, in some embodiments, the shield body 600 includes a front shield 610, a middle shield 620, and a rear shield 630 that are connected in sequence, wherein the middle shield 620 is hermetically inserted into the rear shield 630; the propulsion cylinders 300 and the segment erector 500 are both disposed within the middle shield 620.

[0091] Here, splitting the shield body 600 into the front shield 610, the middle shield 620, and the rear shield 630 connected together facilitates transportation and installation; at the same time, the hermetic insertion between the middle shield 620 and the rear shield 630 can prevent flying sand and gravel from entering the middle shield 620 and the rear shield 630.

[0092] Still further, in some embodiments, the shield auxiliary mechanism further includes an adjustment assembly 800; the adjustment assembly 800 includes a plurality of adjustment cylinders 810, and both ends of each adjustment cylinder 810 are rotatably connected to the front shield 610 and the middle shield 620 respectively.

[0093] In the above embodiment, by providing the adjustment cylinders 810, the angle between the front shield 610 and the middle shield 620 can be adjusted by the telescopic movement of the adjustment cylinders 810, so as to achieve turning during the tunneling process.

[0094] It can be understood that in the present application, there are no restrictions on the number and arrangement form of the adjustment cylinders 810. Those skilled in the art can, according to needs, set multiple groups and arrange them in different azimuths in the circumferential direction of the shield body 600 respectively.

[0095] It should be understood that the various forms of processes shown above can be used, with steps reordered, added, or deleted. For example, the steps recited in the present application disclosure can be executed in parallel, sequentially, or in a different order, as long as the desired results of the technical solution disclosed in the present application can be achieved. No limitations are imposed herein.

[0096] The above specific embodiments do not constitute a limitation on the protection scope of the present application. Those skilled in the art should understand that various modifications, combinations, sub - combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the principles of the present application shall be included within the protection scope of the present application.

Claims

1. A pipe jacking and shield tunneling integrated machine for tunnel construction, comprising a jacking mechanism arranged in a working shaft, the jacking mechanism being configured to provide the thrust for pipe jacking tunneling by jacking a pipe jacking pipe segment during pipe jacking mode construction, characterized in that, It also includes a rock-breaking mechanism and a shield auxiliary mechanism; The rock-breaking mechanism includes a cutter head (100) and a driving assembly (200). The cutter head (100) is located in front of the jacking mechanism along the tunnel boring direction. The driving end of the driving assembly (200) is connected to the cutter head (100) to drive the cutter head (100) to rotate; The shield auxiliary mechanism is arranged between the rock-breaking mechanism and the jacking mechanism. The shield auxiliary mechanism includes a shield propulsion assembly and a segment erector (500). The shield propulsion assembly is configured to provide the thrust for shield tunneling during shield mode construction, and the segment erector (500) is configured to assemble shield segments during shield mode construction.

2. The pipe jacking and shield tunneling integrated machine according to claim 1, wherein, The shield propulsion assembly includes propulsion cylinders (300) and a tightening assembly (400); The tightening assembly (400) is located between the propulsion cylinders (300) and the jacking mechanism. One end of the tightening assembly (400) abuts against the propulsion cylinders (300), and the other end is connected to the shield segment assembled by the segment erector (500) during shield mode construction.

3. The pipe jacking and shield tunneling integrated machine according to claim 2, characterized in that, The tightening assembly includes a tightening ring (410) and tightening cylinders (420); The tightening ring (410) includes a guiding portion (411) and at least two symmetrically distributed tightening plates (412). Each tightening plate (412) can move telescopically relative to the guiding portion (411) to press against or separate from the tunnel wall; The tightening cylinders (420) are arranged inside the tightening ring (410) to drive the movement of each tightening plate (412).

4. The pipe jacking and shield tunneling machine according to claim 3, characterized in that The tightening assembly further includes a connecting block (430); The connecting block (430) is located between the end of the tightening cylinder (420) and the tightening plate (412). One end of the connecting block (430) is connected to the tightening cylinder (420), and the other end is detachably connected to the tightening plate (412) through a first connecting member (431).

5. The pipe jacking and shield tunneling machine according to claim 3, characterized in that The tightening assembly (400) further includes a seal (440); The seal (440) is located between the guiding portion (411) and the tightening plate (412).

6. The pipe jacking and shield tunneling integrated machine according to claim 5, characterized in that, A groove (411a) is formed on the end face of the guiding portion (411) facing the tightening plate (412) to accommodate the seal (440).

7. The pipe jacking and shield tunneling machine according to claim 3, wherein, The guiding portion (411) includes a plurality of arc-shaped plates (411b) connected in sequence. Among them, the arc-shaped plate (411b) located at the top of the tightening ring (410) is tapered and becomes thinner away from the center of the tightening ring (410).

8. The pipe jacking and shield tunneling integrated machine according to any one of claims 2-7, characterized in that, The shield auxiliary mechanism further includes a shield body (600) and a connecting ring (700); The propulsion cylinders (300) and the segment erector (500) are both arranged inside the shield body (600); The connecting ring (700) is located between the shield body (600) and the jacking device, and one end of the connecting ring (700) is connected to the pipe jacking segment jacked by the jacking mechanism during pipe jacking construction, and the other end is connected to the shield segment assembled by the segment erector (500) during shield construction.

9. The pipe-jacking shield integrated machine according to claim 8, wherein, The shield body (600) includes a front shield (610), a middle shield (620) and a rear shield (630) connected in sequence, wherein the middle shield (620) is hermetically inserted into the rear shield (630); The propulsion cylinders (300) and the segment erector (500) are both arranged inside the middle shield (620).

10. The pipe-jacking and shield tunneling integrated machine according to claim 9, wherein, The shield auxiliary mechanism further includes an adjustment assembly (800); The adjustment assembly includes a plurality of adjustment cylinders (810), and both ends of each adjustment cylinder (810) are rotatably connected to the front shield (610) and the middle shield (620) respectively.

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