Construction method for segmental transfer of shield tunneling machine in limited space

Abstract

The invention provides a segmental transfer construction method for a shield tunneling machine in a limited space, and belongs to the technical field of tunnel construction. The method comprises the following steps that S1, construction preparation is conducted, and a translation route between the receiving position of the shield tunneling machine and a hoisting opening is cleaned; s2, steel plates are fully laid on the cleaned translation route, and a receiving base is arranged at the receiving position of the shield tunneling machine; s3, after the shield tunneling machine completes construction of the second running route, tunnel portal breaking is conducted at the end of the second running route, and the shield tunneling machine moves to the receiving base after breaking the tunnel portal; s4, a front shield, a middle shield and a tail shield of the shield tunneling machine are decomposed; s5, the front shield, the middle shield and the tail shield are moved to the positions of the hoisting openings along the translation route through hydraulic jacks; s6, hoisting of a front shield, a middle shield and a tail shield is sequentially completed outside the hoisting opening; compared with a traditional method, the method breaks through space limitation, the construction efficiency is improved, and the problem that the shield tunneling machine is difficult to hoist in the limited space is effectively solved.

Description

Technical Field

[0001] The invention belongs to the technical field of tunnel construction, and in particular relates to a construction method for segmented transfer of a shield machine in a confined space. Background Art

[0002] In the process of vigorous development of modern urban subway construction, shield construction has been widely used due to its significant advantages such as high efficiency and safety. However, in many actual engineering scenarios, the complex urban environment has brought many difficult problems, especially in the core areas of the city. The site location is often in an extremely busy section of the road with heavy traffic and high difficulty in traffic diversion. At the same time, municipal pipelines are crisscrossed and relocation work faces huge challenges. Against this background, the shield shaft construction method of dark excavation has become a common solution, but this has also caused a series of subsequent construction problems.

[0003] Traditional shield machine receiving methods are mostly based on the open-cut station environment design. When faced with the narrow and fully enclosed space of a dark-cut station, they seem to be unable to cope with it. After the shield machine completes tunnel excavation and is received, due to insufficient ground construction space, it cannot be guaranteed that the receiving position of the shield machine is the lifting port position. In addition, the construction space is limited, making it difficult to move the shield machine to the lifting port position for lifting by using large construction equipment.

[0004] Therefore, it is necessary to provide an improved technical solution to address the above-mentioned deficiencies in the prior art. Summary of the invention

[0005] The purpose of the present invention is to provide a construction method for segmented transfer of a shield machine in a confined space, so as to solve the technical problem in the prior art that it is inconvenient to transfer the shield machine due to limited space.

[0006] In order to achieve the above-mentioned purpose, the present invention provides a construction method for segmented transfer of a shield machine in a confined space, and provides the following technical solutions: A construction method for segmented transfer of a shield machine in a confined space comprises the following steps: S1, construction preparation, clearing the translation route between the receiving position of the shield machine and the lifting port, the translation route includes a longitudinal movement path vertically connecting the first operation route and the second operation route end, the longitudinal movement path and the first operation route are connected to the position extending away from the first operation route. A transverse movement path is arranged in the direction away from the first operation route, the receiving position of the shield machine is located at the end where the longitudinal movement path is connected to the second operation route, and the lifting port is located at the end of the transverse movement path away from the first operation route; S2, fully spread the steel plates on the cleared translation route, and set the receiving base at the receiving position of the shield machine; S3, after the shield machine completes the construction of the second operation route, the tunnel gate is broken at the end of the second operation route, and the shield machine moves to the receiving base after breaking the tunnel gate; S4, disassemble the front shield, middle shield and tail shield of the shield machine; S5, the front shield, the middle shield and the rear shield are respectively translated along the longitudinal path by using hydraulic jacks, and after being rotated at the intersection of the longitudinal path and the transverse path, they are moved to the lifting port position along the transverse path; S6, complete the hoisting of the front shield, middle shield and tail shield in sequence outside the hoisting port.

[0007] As a further optimized technical solution, in S2, the receiving base includes multiple sections of detachably connected brackets. After the shield machine is parked on the receiving base, the front shield, the middle shield and the tail shield are respectively located on one section of the bracket.

[0008] As a further optimized technical solution, each bracket includes: A mobile frame, the mobile frame comprising a support plate arranged at the bottom and a support frame arranged on the top of the support plate for directly supporting the shield machine; The connecting structure is arranged at the end of the movable frame and is used to connect adjacent brackets.

[0009] As a further optimized technical solution, the support frame includes support beams arranged at intervals in transverse direction and support rails arranged on the support beams. The support rails are symmetrically arranged in two groups for jointly supporting the shield machine.

[0010] As a further optimized technical solution, the connection structure includes a first connection unit and a second connection unit respectively arranged at two ends of the bracket; The first connecting unit comprises a connecting seat having a through hole, and the second connecting unit comprises an L-shaped connecting hook which can pass through the through hole and be detachably connected to the connecting seat.

[0011] As a further optimized technical solution, two connecting seats are arranged in parallel, and two corresponding L-shaped connecting hooks are arranged, and the two L-shaped connecting hooks are arranged symmetrically. The second connecting unit also includes a driving structure for driving the two L-shaped connecting hooks to move closer to or away from each other to facilitate disassembly and assembly with the connecting seat.

[0012] As a further optimized technical solution, the driving structure includes a double-headed screw and a guide component arranged in parallel. The double-headed screw is rotatably matched with the movable frame. The two ends of the guide component are respectively fixedly connected to the movable frame. The two L-shaped connecting hooks are respectively arranged in the two opposite sections of the double-headed screw threads and are respectively matched with the double-headed screw threads. The two L-shaped connecting hooks are slidably matched with the guide component. Rotating the double-headed screw can drive the two L-shaped connecting hooks to be relatively close or relatively far away.

[0013] As a further optimized technical solution, the guide component is a rod-shaped structure, and the two L-shaped connecting hooks are sleeved on the guide component and slidably cooperate with the guide component.

[0014] As a further optimized technical solution, the connecting seat is hinged to the bracket, a connecting rod is hinged between the two connecting seats, and a driving component that can drive the connecting seat to rotate is provided on the bracket to drive the connecting seat to rotate and retract into or extend out of the bracket.

[0015] As a further optimized technical solution, during the process of moving the shield machine, hydraulic jacks are arranged on the sides of the bracket to push the bracket along the translation route in stages.

[0016] Beneficial effects: In confined space scenarios such as underground excavation stations, the traditional shield machine hoisting method relies on spacious ground sites and large equipment operating space, which is often limited by insufficient site and narrow space. This construction method breaks this limitation through the segmented translation method. Taking a certain city subway underground excavation station project as an example, the station is surrounded by a densely populated commercial area, and the ground construction site is less than one-third of the traditional method. After adopting this method, the shield machine is smoothly transferred from the receiving position to the hoisting port, completing the hoisting operation, effectively solving the problem of limited space. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings constituting a part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. Among them: Figure 1 A schematic diagram of a construction method flow chart of an embodiment of the present invention; Figure 2 A schematic diagram of a construction site according to an embodiment of the present invention; Figure 3 A schematic diagram of the translation of the front shield according to an embodiment of the present invention; Figure 4 A schematic diagram of the structure of a receiving base according to an embodiment of the present invention; Figure 5 A schematic diagram of a bracket structure according to an embodiment of the present invention; Figure 6 for Figure 4 Schematic diagram of the middle AA direction; Figure 7 This is a schematic diagram of a receiving base supporting a shield machine according to an embodiment of the present invention.

[0018] In the figure: 100, shield machine; 110, front shield; 120, middle shield; 130, tail shield; 200, receiving position; 300, lifting port; 400, first operation route; 500, second operation route; 600, longitudinal movement path; 700, transverse movement path; 800, receiving base; 810, bracket; 811, support plate; 812, support beam; 813, support rail; 815, connecting seat; 816, perforation; 817, L-shaped connecting hook; 818, double-headed screw; 819, guide component; 820, connecting rod; 821, driving component; 900, hydraulic jack. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention belong to the scope of protection of the present invention.

[0020] In the description of the present invention, the terms "longitudinal", "lateral", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and do not require that the present invention must be constructed and operated in a specific orientation. Therefore, they should not be understood as limitations on the present invention. The terms "connected" and "connected" used in the present invention should be understood in a broad sense. For example, they can be fixed connections or detachable connections; they can be directly connected or indirectly connected through intermediate components. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0021] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments. It should be noted that the embodiments and features in the embodiments of the present invention can be combined with each other without conflict.

[0022] The shapes and sizes of the components in the drawings do not reflect the actual proportions of the products, and are only intended to illustrate the contents of the present invention.

[0023] Example 1 During the construction of the shield tunnel section between Shayang Road Station and Heping South Street Station and the shield tunnel section between Heping South Street Station and Jiaxing Street Station in the tenth contract section of the civil construction of the first phase of Shenyang Metro Line 3, the station is located in a busy traffic area, which results in the shield machine being unable to be hoisted out at the receiving hole after receiving. In order to smoothly complete the recovery of the shield machine, the construction method provided by the present invention includes the steps of construction preparation, laying steel plates and setting up receiving bases, receiving shield machines, disassembling shield machines, segmented translation, and hoisting. By clearing specific translation routes, including longitudinal and transverse paths, conditions are created for the segmented translation of the shield machine; using a detachable receiving base, the parking and subsequent disassembly operations of the shield machine are facilitated; using a hydraulic jack to push the bracket in stages, the movement of various parts of the shield machine along the planned route in a confined space is realized, and finally the shield machine reaches the hoisting port and completes the hoisting. The present invention achieves efficient and rapid construction by transferring the shield machine in segments.

[0024] Specifically, Figure 1 , Figure 2 , Figure 3 As shown, the construction method of shield machine segment transfer in confined space includes the following steps: S1, construction preparation, according to the specific terrain of the site and the operation route of the shield machine, accurately measure and mark the translation route between the receiving position 200 of the shield machine 100 and the lifting port 300. The translation route includes a longitudinal path 600 vertically connecting the ends of the first operation route 400 and the second operation route 500, and a transverse path 700 is arranged at the connection position between the longitudinal path 600 and the first operation route 400 extending away from the first operation route 400. The receiving position 200 of the shield machine 100 is located at the end where the longitudinal path 600 is connected to the second operation route 500, and the lifting port 300 is located at the end of the transverse path 700 away from the first operation route 400. Then the translation route is fully cleaned to remove obstacles and debris on the route to ensure the smooth progress of subsequent construction.

[0025] S2, 20mm thick steel plates are laid on the cleaned translation route, the steel plates are closely together, the gaps between the steel plates are welded, and polished to be flush with the steel plate surface to provide a flat and stable moving support surface. At the same time, the receiving base 800 is set at the receiving position 200 of the shield machine 100.

[0026] In this embodiment, the receiving base 800 includes three detachably connected brackets 810, as shown in FIG. Figure 4 As shown, after the shield machine 100 is parked on the receiving base 800 , the front shield 110 , the middle shield 120 and the tail shield 130 are respectively located on a bracket 810 .

[0027] like Figure 5 , Figure 6As shown, each bracket 810 includes a moving frame and a connecting structure.

[0028] The mobile frame includes a support plate 811 arranged at the bottom and a support frame welded and fixed on the top of the support plate 811 for directly supporting the shield machine 100. The support frame has support beams 812 arranged at intervals laterally and support rails 813 set on the support beams 812. The support rails 813 are symmetrically arranged in two groups for jointly supporting the shield machine 100.

[0029] The connection structure is disposed at the end of the movable frame and is used to connect adjacent brackets 810 .

[0030] The connection structure includes a first connection unit and a second connection unit respectively arranged at two ends of the bracket 810; Specifically, the first connecting unit includes a connecting seat 815, which has a through hole 816 that is transversely penetrated, and the second connecting unit has an L-shaped connecting hook 817 that can pass through the through hole 816 and be detachably connected to the connecting seat 815. When the first connecting unit is connected to the second connecting unit, the connection with the connecting seat 815 is achieved by hanging the L-shaped connecting hook 817 through the through hole 816.

[0031] In order to ensure the stability of the connection, in the present embodiment, two connecting seats 815 are arranged in parallel, and two corresponding L-shaped connecting hooks 817 are arranged. The two L-shaped connecting hooks 817 are symmetrically arranged, and the second connecting unit also includes a driving structure for driving the two L-shaped connecting hooks 817 to move closer to or away from each other to facilitate disassembly and assembly with the connecting seat 815.

[0032] In this embodiment, the driving structure includes a double-headed screw 818 and a guide component 819 arranged in parallel. The double-headed screw 818 is rotatably matched with the movable frame through a bearing. The two ends of the guide component 819 are respectively fixedly connected to the movable frame. The two L-shaped connecting hooks 817 are respectively arranged in the two opposite threaded sections of the double-headed screw 818, and are respectively threadedly matched with the double-headed screw 818. The two L-shaped connecting hooks 817 are slidably matched with the guide component 819. Rotating the double-headed screw 818 can drive the two L-shaped connecting hooks 817 to be relatively close or relatively far away.

[0033] In this embodiment, the guide component 819 is a rod-shaped structure, and the two L-shaped connecting hooks 817 are sleeved on the guide component 819 and slidably cooperate with the guide component 819.

[0034] In the above scheme, the length extension direction of the double-headed screw 818 is arranged parallel to the width direction of the bracket 810, and the driving end of the double-headed screw 818 extends to one side of the bracket 810. In this way, when the shield machine 100 is located above the receiving base 800, it is convenient to disassemble the bracket 810 from the side of the receiving base 800.

[0035] In the present invention, when the normal connection seat 815 is connected to the L-shaped connection hook 817, the connection seat 815 extends out of a part of the bracket 810. When the shield machine 100 needs to be translated in sections, the double-headed screw 818 drives the two L-shaped connection hooks 817 to move away from each other. At this time, if the bracket 810 is directly moved laterally (especially the bracket 810 where the front shield 110 is located directly faces the longitudinal movement path 600, and it is most convenient to directly translate the bracket 810 along the longitudinal movement path 600 after the connection is disconnected), the connection seat 815 is easy to interfere with the L-shaped connection hook 817, and it is necessary to operate the two disconnected brackets 810 to keep a certain distance to the connection seat 810. 15 and the L-shaped connecting hook 817 no longer have the risk of interference, and then the bracket 810 is translated. The operation is very cumbersome. In the present invention, in order to facilitate the operation of moving the bracket 810 after the bracket 810 is disconnected, the connecting seat 815 is hinged to the bracket 810, and a connecting rod 820 is hinged between the two connecting seats 815. The bracket 810 is provided with a driving component 821 that can push the connecting seat 815 to rotate. In this embodiment, the driving component 821 is a screw, and two of them are symmetrically arranged. The screw is threadedly connected to the movable frame, and the two screws cooperate with each other to drive the connecting seat 815 to rotate and retract or extend the bracket 810.

[0036] Specifically, when the connection seat 815 needs to be extended, Figure 5 As shown, two screws are respectively pressed against one side of a connecting seat 815, and the connecting seat 815 is perpendicular to the width direction of the bracket 810, so as to facilitate the connection between the connecting seat 815 and the L-shaped connecting hook 817. When the connecting seat 815 and the L-shaped connecting hook 817 are disconnected, the screw on the left moves to the left, leaving space for the screw on the right to move to the left and then push the connecting seat 815 to rotate, so that the end of the connecting seat 815 extending out of the bracket 810 is retracted into the inside of the bracket 810. At this time, there is no risk of interference between the connecting seat 815 and the L-shaped connecting hook 817, and the bracket 810 can be moved directly.

[0037] S3, after the shield machine 100 completes the construction of the second operation route 500, it breaks the tunnel door at the end of the second operation route 500. When breaking the tunnel door, it is necessary to strictly follow the construction specifications and safety requirements to ensure that the shield machine 100 and the surrounding structures are not damaged during the breaking process. After the shield machine 100 breaks the tunnel door, it slowly moves to the receiving base 800, so that the front shield 110, the middle shield 120 and the rear shield 130 are respectively located on a bracket 810. The state of the receiving base 800 supporting the shield machine is as follows: Figure 7 shown.

[0038] S4, using professional disassembly tools, disassemble the front shield 110, the middle shield 120 and the rear shield 130 of the shield machine 100 according to the pre-established disassembly plan. During the disassembly process, number each connecting bolt and component, and use a marker to mark the surface of the component. At the same time, record the connection relationship and installation position of each component in detail to form a disassembly record document for subsequent assembly.

[0039] The specific disassembly steps are as follows: S401, removal of the conveyor belt in front shield 110: After the screw machine is unearthed, clean the belt in time, cut the conveyor belt, and pull the belt out of the tunnel with an electric vehicle.

[0040] S402, dismantling of the high-voltage cable of the shield machine 100: after the high-voltage cable is powered off, it is manually recovered and the high-voltage cable of the shield machine 100 is coiled in sequence on the flatbed of the battery vehicle, taking care to protect the cable from damage.

[0041] S403, pipeline removal: Pipeline removal is carried out according to the general principle of water and gas first, grease and then hydraulic pressure. During the removal process, the two adjacent connecting parts of the shield body of the shield machine 100 should be considered. During the removal, the convenience of disassembly and assembly and the selection of the fixed end of the pipeline should be considered to prevent the pipeline from being crushed and difficult to install due to improper selection of the fixed end. During the removal process, it is important to pay attention to marking and protecting the joints, and wrap the joints with plugs or clean plastic film to fix the pipeline for easy lifting. Remove the binding tape and seal, connect the pipeline strictly according to the drawings and markings, and clean the hydraulic system.

[0042] S404, electrical cable removal: The electrical circuits have been fully marked during installation. The circuits should be strictly marked in accordance with the electrical drawings. After removal, the connection terminals should be protected. Pay attention to protecting the cables from damage.

[0043] S405, dismantling the shield machine 100 in sections: dismantling the components connected between the front shield 110, the middle shield 120 and the tail shield 130 of the shield machine 100, so that the front shield 110, the middle shield 120 and the tail shield 130 are separated from each other.

[0044] S5, the front shield 110, the middle shield 120 and the rear shield 130 are respectively translated along the longitudinal path 600 by using the hydraulic jacks 900, and after rotating at the intersection of the longitudinal path 600 and the transverse path 700, they are moved to the position of the hoisting port 300 along the transverse path 700. In the process of moving the shield machine 100, the hydraulic jacks 900 are arranged on the side of the bracket 810 to push the bracket 810 to move along the translation route in stages.

[0045] The translation process will be specifically described by taking the shield 111 as an example. Figure 5As shown, first install two 200t hydraulic jack 900 cylinders on one side of the bracket 810 supporting the front shield 110, weld the bull leg on the steel plate to provide reverse thrust for the hydraulic jack 900, open the hydraulic pump station, use the two cylinders to translate the bracket 810 as a whole at the same time, and after reaching the maximum safe stroke of the jack, remove the bull leg and reinstall the hydraulic jack 900 for cyclic translation construction. The thrust of the front shield 110 moving forward from rest is controlled within 1000KN. Try to keep the horizontal direction during the translation process, and observe the safe distance of the front shield 110 at any time, as well as whether the bracket 810 and the bull leg structure are deformed.

[0046] When the front shield 110 is translated to the intersection of the longitudinal path 600 and the transverse path 700, since the transverse path 700 and the longitudinal path 600 are perpendicular to each other, the bracket 810 needs to be rotated 90° and then continue to move along the transverse path 700. During the rotation process, two hydraulic jacks 900 are arranged on both sides of the bracket 810, and the two hydraulic jacks 900 are respectively located at one end of the bracket 810 for pushing. During the pushing process, pay attention to the relationship between the extension direction of the oil cylinder and the angle between the bracket 810, weld the position of the bull leg several times, adjust the angle of the oil cylinder, and rotate the angle 4° to 8° each time to prevent the oil cylinder from collapsing and injuring people. Finally, the shield body is pushed and translated by 90° by adjusting and changing the welding bull leg position several times. After the rotation is completed, the two hydraulic jacks 900 are arranged on one side of the bracket 810 to jointly push the bracket 810 to translate along the transverse path 700 until it is directly below the hoisting port 300.

[0047] S6, after the front shield 110, the middle shield 120 and the rear shield 130 are moved to the position of the hoisting port 300 in sequence, the rear shield 130, the middle shield 120 and the front shield 110 are hoisted out of the tunnel using appropriate hoisting equipment outside the hoisting port 300. During the hoisting process, the hoisting operation procedures must be strictly followed to ensure hoisting safety.

[0048] It should be understood that the above description is merely exemplary and the embodiments of the present application do not limit this.

[0049] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention are within the scope of protection of the pending claims of the present invention.

Claims

1. A construction method for segmented transfer of a shield machine in a confined space, characterized in that: The following steps are involved: S1, construction preparation, clearing the translation route between the receiving position (200) of the shield machine (100) and the lifting port (300), the translation route including a longitudinal movement path (600) vertically connecting the ends of the first operation route (400) and the second operation route (500), a transverse movement path (700) extending from the connection position of the longitudinal movement path (600) and the first operation route (400) in a direction away from the first operation route (400), the receiving position (200) of the shield machine (100) is located at one end where the longitudinal movement path (600) and the second operation route (500) are connected, and the lifting port (300) is located at one end of the transverse movement path (700) away from the first operation route (400); S2, fully paving the cleaned translation route with steel plates, and setting the receiving base (800) at the receiving position (200) of the shield machine (100); S3, after the shield machine (100) completes the construction of the second operation route (500), the tunnel door is broken at the end of the second operation route (500), and the shield machine (100) moves to the receiving base (800) after breaking the tunnel door; S4, disassembling the front shield (110), the middle shield (120) and the rear shield (130) of the shield machine (100); S5, the front shield (110), the middle shield (120) and the rear shield (130) are respectively translated along the longitudinal path (600) by using a hydraulic jack (900), and after being rotated at the intersection of the longitudinal path (600) and the transverse path (700), they are moved along the transverse path (700) to the position of the lifting opening (300); S6, the front shield (110), the middle shield (120) and the rear shield (130) are sequentially hoisted outside the hoisting opening (300).

2. The method for section-by-section transfer of a shield machine in a confined space according to claim 1 is characterized in that: In S2, the receiving base (800) includes a plurality of detachably connected brackets (810), and after the shield machine (100) is parked on the receiving base (800), the front shield (110), the middle shield (120) and the rear shield (130) are respectively located on a bracket (810).

3. The method for section-by-section transfer of a shield machine in a confined space according to claim 2 is characterized in that: Each section of the bracket (810) comprises: A mobile frame, the mobile frame comprising a support plate (811) arranged at the bottom and a support frame arranged on the top of the support plate (811) for directly supporting the shield machine (100); A connecting structure is provided at the end of the movable frame and is used to connect adjacent brackets (810).

4. The method for section-by-section transfer of a shield machine in a confined space according to claim 3 is characterized in that: The support frame comprises support beams (812) arranged at intervals in the transverse direction and support rails (813) arranged on the support beams (812); two groups of support rails (813) are symmetrically arranged and are used to jointly support the shield machine (100).

5. The construction method for segmented transfer of a shield machine in a confined space according to claim 3 is characterized in that: The connection structure comprises a first connection unit and a second connection unit which are respectively arranged at two ends of the bracket (810); The first connection unit comprises a connection seat (815), the connection seat (815) having a through hole (816), and the second connection unit comprises an L-shaped connection hook (817) that can pass through the through hole (816) and be detachably connected to the connection seat (815).

6. The method for section-by-section transfer of a shield machine in a confined space according to claim 5 is characterized in that: Two connecting seats (815) are arranged in parallel, and two corresponding L-shaped connecting hooks (817) are arranged. The two L-shaped connecting hooks (817) are arranged symmetrically. The second connecting unit also includes a driving structure for driving the two L-shaped connecting hooks (817) to move closer to or farther from each other, so as to facilitate disassembly and assembly with the connecting seat (815).

7. The method for section-by-section transfer of a shield machine in a confined space according to claim 6 is characterized in that: The driving structure comprises a double-headed screw (818) and a guide component (819) arranged in parallel, the double-headed screw (818) is rotatably matched with the movable frame, and the two ends of the guide component (819) are respectively fixedly connected to the movable frame, and the two L-shaped connecting hooks (817) are respectively arranged in two opposite threaded sections of the double-headed screw (818) and are respectively threadedly matched with the double-headed screw (818), and the two L-shaped connecting hooks (817) are slidably matched with the guide component (819), and the rotation of the double-headed screw (818) can drive the two L-shaped connecting hooks (817) to be relatively close to or relatively far away.

8. The method for section-by-section transfer of a shield machine in a confined space according to claim 7 is characterized in that: The guide component (819) is a rod-shaped structure, and the two L-shaped connecting hooks (817) are sleeved on the guide component (819) and slidably cooperate with the guide component (819).

9. The construction method for segmented transfer of a shield machine in a confined space according to claim 7 is characterized in that: The connecting seat (815) is hinged to the bracket (810), a connecting rod (820) is hinged between the two connecting seats (815), and a driving component (821) is provided on the bracket (810) that can push the connecting seat (815) to rotate, so as to drive the connecting seat (815) to rotate and be retracted into or extended from the bracket (810).

10. The method for section-by-section transfer of a shield machine in a confined space according to claim 2, characterized in that: During the process of moving the shield machine (100), the hydraulic jack (900) is arranged on the side of the bracket (810) to push the bracket (810) along the translation route in stages.

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