Shield tunnel temporary support device with self-stabilizing function

Abstract

The application provides a shield tunnel temporary support device with self-stabilizing function and relates to the field of shield tunnel construction.The bottom plate is fixedly connected with vertical supports at both ends, the top ends of the two vertical supports are fixedly connected with a cross beam plate, a plurality of support plates are arranged between the two vertical supports, and a central shaft is fixedly connected between the top ends of the two vertical supports.The coaxial synchronous reverse rotation of the support plates on both sides is realized through the central shaft, the unfolding angle can be quickly adjusted, a hexagonal support structure suitable for a circular tunnel segment is formed, the installation angles between the three support plates are accurately synchronized through coaxial rotation adjustment, the construction standard is effectively ensured to be uniform, and the installation efficiency of the support device is greatly improved.The oblique reinforcing members are arranged to be synchronously unfolded in two directions, the gear meshing and the rack transmission are cooperatively arranged, the synchronous unfolding and the consistent angle of the two oblique reinforcing members are ensured, a multidimensional triangular reinforcing structure is formed, and the support firmness is further improved.

Description

Technical Field

[0001] This invention relates to the field of shield tunnel construction, and in particular to a temporary support device for shield tunnels with self-stabilizing function. Background Technology

[0002] During shield tunnel construction, temporary support devices are core equipment for ensuring construction safety and preventing tunnel segment deformation and collapse. Their performance is directly related to the safety, efficiency and quality of shield construction, and they are indispensable key supporting facilities during shield launching, excavation and segment installation.

[0003] Currently, most existing temporary support devices for shield tunnels employ a traditional structure of multiple support rods interlocked and bolted together for temporary support and reinforcement of circular tunnel segments. However, in actual construction applications, this traditional support system requires multiple support rods to be interlocked one by one, their positions calibrated, and then bolted in place. This process is cumbersome, time-consuming, and labor-intensive. Furthermore, the entire process relies on manual calibration of the angles and positions of each support rod, making synchronous adjustment impossible. This results in deviations in the installation angles of the support components, insufficient support precision, and difficulty in accurately conforming to the curvature of the circular tunnel segments. This affects the support's load-bearing capacity, reduces installation efficiency, and fails to guarantee the uniformity of construction standards, thus not meeting the requirements of standardized shield tunneling operations. Secondly, traditional support devices rely heavily on the rigid support of a single planar interlocking support rod for stability. The support structure has weak resistance to deformation, and even with the addition of diagonal supports in a single direction of force on the side, sufficient stability cannot be guaranteed, leading to problems such as loosening, displacement, and swaying.

[0004] Therefore, it is necessary to provide a new temporary support device for shield tunnels with self-stabilizing function to solve the above-mentioned technical problems. Summary of the Invention

[0005] To solve the above-mentioned technical problems, the present invention provides a temporary support device for shield tunnels with self-stabilizing function.

[0006] The present invention provides a temporary support device for a shield tunnel with self-stabilizing function, comprising: a base plate, wherein both ends of the base plate are fixedly connected to uprights, the top ends of the two uprights are fixedly connected to crossbeams, multiple support plates are provided between the two uprights, a central shaft is fixedly connected between the top ends of the two uprights, the middle support plate is fixedly connected to the central shaft, the top ends of the two uprights are provided with fitting arc plates, the middle of the middle support plate is provided with a vertical plate, the lower end of the vertical plate is fixedly connected to the middle of the crossbeams; and a quick assembly mechanism, wherein the quick assembly mechanism includes a locking port, the locking port is provided on the support plate, the locking ports on the two sides of the support plate are symmetrically arranged, the fitting arc plate is provided with a through opening, a locking rod is slidably connected in the through opening, one end of the locking rod is fixedly connected to a pusher, both ends of the pusher are provided with side lugs, a fixed rail is fixedly connected to the side wall of the fitting arc plate, and an inner tube is fixedly connected to both side lugs.

[0007] Preferably, both side ear seats are provided with rail grooves, and the two side ear seats are slidably connected to both ends of the fixed rail. Both ends of the fixed rail are provided with locking grooves, and the two locking grooves are respectively aligned with the two embedded tubes.

[0008] Preferably, a stop rod is slidably connected in the inner tube, a clamp is fixedly connected to the lower end of the stop rod, a pull member is provided at the upper end of the stop rod, and a spring is sleeved on the stop rod, with the spring located inside the inner tube.

[0009] Preferably, a built-in limiting plate is fixedly connected to the clamp rod. The built-in limiting plate is located inside the embedded tube. One end of the spring is connected to the built-in limiting plate, and the other end of the spring is connected to the inner wall of the embedded tube. Protrusions are provided on both sides of the built-in limiting plate. Two inner wall side grooves are symmetrically provided on the inner wall of the embedded tube. The two protrusions are slidably connected to the two inner wall side grooves respectively.

[0010] Preferably, both ends of the support plate are provided with adjusting abutments. Each adjusting abutment includes two fixed plates, both of which are fixedly connected to one end of the support plate. A locking rod is slidably connected to one of the fixed plates, and a foot is fixedly connected to one end of the locking rod. An adjusting rod is rotatably connected between the two fixed plates, and an adjusting block is fixedly connected to the other end of the locking rod. A main turntable is fixedly connected to one end of the adjusting rod. The adjusting block is provided with a threaded opening, and the adjusting rod is a threaded rod. The adjusting block and the adjusting rod are threadedly connected.

[0011] Preferably, the upper and lower ends of the support frame are provided with external seats, and two rotating shafts are symmetrically rotatably connected between the two external seats. A rotating seat is fixedly connected to each of the two rotating shafts, and an inclined reinforcing member is fixedly connected to each of the two rotating seats.

[0012] Preferably, gears are fixedly connected to the top ends of both shafts, the two gears mesh symmetrically with each other, a strip block is provided on one side of one end of the gear, a rack is provided on the side wall of the strip block, and the rack meshes with a nearby gear.

[0013] Preferably, a frame plate is fixedly connected to the upper external seat, a limit rod is fixedly connected between the frame plates, the strip block is slidably connected to the limit rod, a horizontal shaft is rotatably connected between the frame plates, a secondary turntable is installed and connected to one end of the horizontal shaft, the strip block is provided with a threaded opening, the horizontal shaft is a threaded rod, and the strip block is threadedly connected to the horizontal shaft.

[0014] Compared with related technologies, the temporary support device for shield tunnels with self-stabilizing function provided by the present invention has the following beneficial effects: 1. This invention enables the coaxial synchronous counter-rotation of the support plates on both sides through the central axis, which can quickly adjust the unfolding angle to form a hexagonal support structure that is compatible with circular tunnel segments. It eliminates the need for complex cross splicing, saving time and effort. Furthermore, the coaxial rotation adjustment ensures precise synchronization of the installation angles between the three support plates, effectively guaranteeing uniform construction standards and significantly improving the installation efficiency of the support device, thus meeting the high-efficiency requirements of shield tunnel construction. 2. This invention, by setting up bidirectional synchronously unfolding inclined reinforcement members, combined with the synergistic effect of gear meshing and rack and pinion transmission, ensures that the two inclined reinforcement members unfold synchronously and at the same angle, forming a multi-dimensional triangular reinforcement structure. The stability characteristics of the triangular structure can effectively improve the overall deformation resistance of the device. Combined with the adjustment blocks at both ends of the support plate, the fit between the foot and the tunnel segment can be precisely adjusted, further enhancing the support's firmness, preventing the support device from shifting or shaking, and ensuring structural safety during tunnel construction. 3. This invention drives the locking rod to slide along the through-hole of the fitting arc plate by pushing the pusher. The locking rod is inserted into the locking hole on the support plate. At the same time, the abutment rod in the inner tube pushes the clasp to slide into the locking groove under the elastic force of the spring. This can quickly and firmly lock the locking rod and the locking hole. It can quickly complete the assembly and disassembly of each component, facilitate the handling, debugging and recycling during construction, has strong versatility, can be reused, and reduces construction costs. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of a preferred embodiment of the present invention; Figure 2 for Figure 1 An exploded view of a preferred embodiment is shown below; Figure 3 for Figure 2 The diagram shows the structure at point A. Figure 4 for Figure 3The diagram shows the structure at point B. Figure 5 for Figure 4 The diagram shows the internal structure of the embedded tube. Figure 6 for Figure 2 The diagram shows the structure at point C. Figure 7 for Figure 1 The diagram shows the structure at point D. Figure 8 for Figure 7 The diagram shows the structure at point E.

[0016] The following are the labeling elements in the diagram: 1. Base plate; 11. Upright frame; 12. Horizontal beam plate; 2. Support plate; 3. Central shaft; 31. Fitting arc plate; 32. Vertical plate; 4. Locking port; 41. Locking rod; 42. Pushing component; 421. Side ear seat; 43. Fixed rail; 44. Inner tube; 45. Locking rod; 46. Locking head; 47. Pulling component; 48. Spring; 5. Built-in limiting plate; 51. Inner wall side groove; 6. Fixed plate; 61. Support rod; 62. Support foot; 63. Adjusting rod; 64. Adjusting block; 65. Main turntable; 7. External seat; 71. Rotating shaft; 72. Rotating seat; 73. Angled reinforcement component; 74. Gear; 8. Strip block; 81. Rack; 82. Frame plate; 83. Limiting rod; 9. Horizontal shaft; 91. Secondary turntable. Detailed Implementation

[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0018] Please refer to the following: Figures 1 to 8 A temporary support device for a shield tunnel with self-stabilizing function includes: a base plate 1, with uprights 11 fixedly connected to both ends of the base plate 1, and crossbeams 12 fixedly connected to the tops of the two uprights 11. Multiple support plates 2 are provided between the two uprights 11, and a central shaft 3 is fixedly connected between the tops of the two uprights 11. The middle support plate 2 is fixedly connected to the central shaft 3. An interlocking arc plate 31 is provided at the top of each of the two uprights 11, and a vertical plate 32 is provided in the middle of the middle support plate 2. The lower end of the vertical plate 32... It is fixedly connected to the middle of the crossbeam plate 12; the quick assembly mechanism includes a locking port 4, which is located on the support plate 2. The locking ports 4 on both sides of the support plate 2 are symmetrically arranged. The fitting arc plate 31 is provided with a through hole, and a locking rod 41 is slidably connected in the through hole. One end of the locking rod 41 is fixedly connected to a pusher 42. Both ends of the pusher 42 are provided with side ear seats 421. A fixed rail 43 is fixedly connected to the side wall of the fitting arc plate 31. An inner tube 44 is fixedly connected to both side ear seats 421.

[0019] In the specific implementation process, such as Figure 3 and Figure 4As shown, each of the two side ear seats 421 is provided with a rail groove. The two side ear seats 421 are slidably connected to both ends of the fixed rail 43. Both ends of the fixed rail 43 are provided with locking grooves. The two locking grooves are respectively aligned with the two embedded tubes 44.

[0020] It should be noted that: by using the central axis 3, the middle of the three support plates 2 are all located at the same axis point, so that the support plates 2 on both sides can rotate synchronously in opposite directions around the central axis 3, thereby adjusting the unfolding angle between the three support plates 2 to form a hexagonal multi-angle support structure, which can accurately fit the circular segments inside the shield tunnel and complete the basic support positioning. The sliding fit between the rail groove and the fixed rail 43 can precisely limit the movement direction of the pusher 42, ensuring that the pusher 42 drives the locking rod 41 to slide smoothly and avoid the locking rod 41 from deviating and failing to be accurately inserted into the lock hole 4. Meanwhile, the locking grooves at both ends of the fixed rail 43 are aligned with the embedded tube 44, providing precise positioning for the subsequent insertion of the clamp 46, ensuring the locking reliability of the quick assembly mechanism, and realizing the rapid assembly and fixing of each component.

[0021] refer to Figure 4 and Figure 5 As shown, a locking rod 45 is slidably connected in the inner tube 44, a locking head 46 is fixedly connected to the lower end of the locking rod 45, a pull member 47 is provided at the upper end of the locking rod 45, and a spring 48 is sleeved on the locking rod 45. The spring 48 is located inside the inner tube 44.

[0022] It should be noted that: the pull member 47 allows the operator to manually pull the lever 45 to separate the locking head 46 from the locking groove, thereby unlocking the locking lever 41 and facilitating the disassembly of the device; the spring 48 provides continuous elastic force to the lever 45, pushing the locking head 46 to tightly engage with the locking groove, ensuring that the locking lever 41 and the locking port 4 are firmly locked, preventing the device from loosening due to external forces such as vibration during use, and ensuring the stability of the support device.

[0023] refer to Figure 5 As shown, a built-in limiting plate 5 is fixedly connected to the lever 45. The built-in limiting plate 5 is located inside the embedded tube 44. One end of the spring 48 is connected to the built-in limiting plate 5, and the other end of the spring 48 is connected to the inner wall of the embedded tube 44. Protrusions are provided on both sides of the built-in limiting plate 5. Two inner wall side grooves 51 are symmetrically provided on the inner wall of the embedded tube 44. The two protrusions are slidably connected to the two inner wall side grooves 51 respectively.

[0024] It should be noted that the built-in limiting plate 5 serves two purposes: firstly, it fixes the spring 48 to ensure that the elastic force of the spring 48 can act stably on the locking rod 45; secondly, it prevents the locking rod 45 from falling out of the inner tube 44, thus playing a limiting role. The sliding engagement between the protrusion and the inner wall side groove 51 can guide the sliding direction of the locking rod 45, preventing the locking rod 45 from rotating or shifting during the sliding process, and ensuring that the locking head 46 can be accurately aligned and locked into the locking groove.

[0025] refer to Figure 2 and Figure 6 As shown, both ends of the support plate 2 are provided with adjusting abutments. The adjusting abutments include two fixed plates 6, both of which are fixedly connected to one end of the support plate 2. A abutment rod 61 is slidably connected to one fixed plate 6. A foot 62 is fixedly connected to one end of the abutment rod 61. An adjusting rod 63 is rotatably connected between the two fixed plates 6. An adjusting block 64 is fixedly connected to the other end of the abutment rod 61. A main turntable 65 is fixedly connected to one end of the adjusting rod 63. The adjusting block 64 is provided with a threaded opening. The adjusting rod 63 is a threaded rod. The adjusting block 64 is threadedly connected to the adjusting rod 63.

[0026] It should be noted that the fixing plate 6 provides mounting support for the adjusting rod 63 and the abutment rod 61, ensuring the structural stability of the adjusting abutment; Rotating the main turntable 65 can drive the adjusting rod 63 of the threaded rod structure to rotate. Using the threaded transmission principle, the adjusting block 64 drives the abutment rod 61 to slide along the fixed plate 6, thereby adjusting the extension length of the abutment foot 62, so that the abutment foot 62 can accurately fit the tunnel segments of different diameters, further optimizing the support effect and enhancing the support stability.

[0027] refer to Figure 1 and Figure 7 As shown, both the upper and lower ends of the support frame 11 are provided with external seats 7. Two rotating shafts 71 are symmetrically rotatably connected between the two external seats 7. Rotary seats 72 are fixedly connected to the two rotating shafts 71. Inclined reinforcement parts 73 are fixedly connected to the two rotating seats 72.

[0028] It should be noted that: the outer seat 7 provides rotational support for the rotating shaft 71, ensuring that the rotating shaft 71 can rotate stably. The rotating seat 72 is used to connect the rotating shaft 71 and the inclined reinforcement member 73, so that the rotation of the rotating shaft 71 can synchronously drive the inclined reinforcement member 73 to unfold or retract. After unfolding, the inclined reinforcement member 73 can form a triangular reinforcement structure, which further effectively improves the overall deformation resistance and support stability of the device, providing multi-dimensional reinforcement protection for the device and making it more stable.

[0029] refer to Figure 7 and Figure 8 As shown, gears 74 are fixedly connected to the top of both shafts 71. The two gears 74 mesh symmetrically with each other. A strip block 8 is provided on one side of one end of the gear 74. A rack 81 is provided on the side wall of the strip block 8. The rack 81 meshes with a nearby gear 74.

[0030] It should be noted that the two gears 74 mesh with each other, which can realize the synchronous reverse rotation of the two rotating shafts 71, thereby driving the two inclined reinforcement members 73 to unfold or retract synchronously, ensuring that the unfolding angle of the two inclined reinforcement members 73 is consistent, and ensuring the symmetry and stability of the triangular reinforcement structure. The rack 81 meshes with one of the gears 74, which can convert the linear motion of the strip block 8 into the rotation of the gear 74, providing power transmission for the rotation of the shaft 71 and realizing the precise adjustment of the inclined reinforcement 73.

[0031] refer to Figure 8 As shown, a frame plate 82 is fixedly connected to the upper outer seat 7, and a limit rod 83 is fixedly connected between the frame plates 82. The strip block 8 is slidably connected to the limit rod 83. A horizontal shaft 9 is rotatably connected between the frame plates 82. A secondary turntable 91 is installed and connected to one end of the horizontal shaft 9. The strip block 8 is provided with a threaded port, and the horizontal shaft 9 is a threaded rod. The strip block 8 is threadedly connected to the horizontal shaft 9.

[0032] It should be noted that: the frame plate 82 provides mounting support for the horizontal shaft 9 and the limiting rod 83 to ensure the stability of the transmission structure. The limiting rod 83 limits the sliding direction of the strip block 8 to prevent the strip block 8 from deviating during the sliding process and to ensure that the rack 81 and the gear 74 can mesh stably. Rotating the secondary turntable 91 can drive the horizontal shaft 9 of the threaded rod structure to rotate, and using the threaded transmission principle, drive the strip block 8 to move linearly along the limit rod 83. Then, using the meshing of the rack 81 and the gear 74, drive the rotating shaft 71 to rotate, so as to achieve precise control of the unfolding angle of the inclined reinforcement 73.

[0033] The working principle of the temporary support device for shield tunnels with self-stabilizing function provided by the present invention is as follows: The device is based on the base plate 1, and the uprights 11 fixed at both ends and the top crossbeam plate 12 form the main support frame. The central axis 3 is fixed between the tops of the two uprights 11. The central axis 3 is used to make the middle of the three support plates 2 all be at the same axis point, so that the two support plates 2 on both sides can rotate synchronously in opposite directions around the central axis 3, thereby adjusting the unfolding angle between the three support plates 2 to form a hexagonal multi-angle support structure, which accurately fits the circular tube segments inside the shield tunnel and completes the basic support positioning.

[0034] During assembly, after rotating the support plates 2 on both sides to the target angle, push the pusher 42 in sequence to drive the locking rod 41 to slide along the through-hole of the fitting arc plate 31. The locking rod 41 is inserted into the locking port 4 on the support plate 2. At the same time, the side ear seat 421 slides along the fixed rail 43 with the pusher 42 until the inner tube 44 is aligned with the locking grooves at both ends of the fixed rail 43. The locking rod 45 in the inner tube 44 pushes the locking head 46 to slide into the locking groove under the elastic force of the spring 48, so that the locking rod 41 and the locking port 4 can be quickly and firmly locked, and the quick assembly of the device can be completed.

[0035] In terms of self-stabilizing reinforcement, two rotating shafts 71 are provided between the outer seats 7 at the upper and lower ends of the support frame 11. The rotating seats 72 on the rotating shafts 71 are connected to the inclined reinforcement parts 73. The gears 74 at the top of the two rotating shafts 71 mesh with each other. The rotating sub-rotor 91 drives the horizontal shaft 9 to rotate. The horizontal shaft 9 drives the strip block 8 to slide along the limiting rod 83. The rack 81 on the strip block 8 meshes with one of the gears 74, driving the two gears 74 to rotate synchronously in opposite directions. This causes the two inclined reinforcement parts 73 to unfold synchronously, forming a multi-dimensional triangular reinforcement structure and improving the overall support stability. At the same time, the feet 62 at both ends of the support plate 2 can drive the adjusting rod 63 to rotate by rotating the main turntable 65. The adjusting rod 63 drives the adjusting block 64 and the abutment rod 61 to move, so that the feet 62 can fit tightly against the tunnel segments, further optimizing the support effect and ensuring the overall self-stabilizing reliability of the device.

[0036] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural or procedural transformations made based on the content of the present invention specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. A temporary support device for a shield tunnel with self-stabilizing function, characterized in that, include: A base plate (1) is fixedly connected to two uprights (11) at both ends. A crossbeam plate (12) is fixedly connected to the top of the two uprights (11). Multiple support plates (2) are provided between the two uprights (11). A central shaft (3) is fixedly connected between the tops of the two uprights (11). The middle support plate (2) is fixedly connected to the central shaft (3). An interlocking arc plate (31) is provided at the top of the two uprights (11). A vertical plate (32) is provided in the middle of the middle support plate (2). The lower end of the vertical plate (32) is fixedly connected to the middle of the crossbeam plate (12). The quick assembly mechanism includes a locking port (4), which is located on a support plate (2). The locking ports (4) on both sides of the support plate (2) are symmetrically arranged. The fitting arc plate (31) is provided with a through opening. A locking rod (41) is slidably connected in the through opening. A pusher (42) is fixedly connected to one end of the locking rod (41). Both ends of the pusher (42) are provided with side ear seats (421). A fixed rail (43) is fixedly connected to the side wall of the fitting arc plate (31). An inner tube (44) is fixedly connected to both side ear seats (421).

2. The temporary support device for a shield tunnel with self-stabilizing function according to claim 1, characterized in that, Both of the side ear seats (421) are provided with rail grooves. The two side ear seats (421) are slidably connected to both ends of the fixed rail (43). Both ends of the fixed rail (43) are provided with locking grooves. The two locking grooves are respectively aligned with the two embedded tubes (44).

3. A temporary support device for a shield tunnel with self-stabilizing function according to claim 1, characterized in that, A locking rod (45) is slidably connected in the inner tube (44). A locking head (46) is fixedly connected to the lower end of the locking rod (45). A pull member (47) is provided at the upper end of the locking rod (45). A spring (48) is sleeved on the locking rod (45). The spring (48) is located inside the inner tube (44).

4. A temporary support device for a shield tunnel with self-stabilizing function according to claim 3, characterized in that, The locking rod (45) is fixedly connected to a built-in limiting plate (5), which is located inside the embedded tube (44). One end of the spring (48) is connected to the built-in limiting plate (5), and the other end of the spring (48) is connected to the inner wall of the embedded tube (44). Both sides of the built-in limiting plate (5) are provided with protrusions. The inner wall of the embedded tube (44) is symmetrically provided with two inner wall side grooves (51), and the two protrusions are slidably connected to the two inner wall side grooves (51) respectively.

5. A temporary support device for a shield tunnel with self-stabilizing function according to claim 1, characterized in that, The support plate (2) is provided with adjusting abutments at both ends. The adjusting abutments include two fixed plates (6). Both fixed plates (6) are fixedly connected to one end of the support plate (2). A abutment rod (61) is slidably connected to one fixed plate (6). A foot (62) is fixedly connected to one end of the abutment rod (61). An adjusting rod (63) is rotatably connected between the two fixed plates (6). An adjusting block (64) is fixedly connected to the other end of the abutment rod (61). A main turntable (65) is fixedly connected to one end of the adjusting rod (63). A threaded opening is provided on the adjusting block (64). The adjusting rod (63) is a threaded rod. The adjusting block (64) is threadedly connected to the adjusting rod (63).

6. A temporary support device for a shield tunnel with self-stabilizing function according to claim 1, characterized in that, The upper and lower ends of the support frame (11) are provided with external seats (7), and two rotating shafts (71) are symmetrically rotatably connected between the two external seats (7). Rotary seats (72) are fixedly connected to the two rotating shafts (71), and inclined reinforcing members (73) are fixedly connected to the two rotating seats (72).

7. A temporary support device for a shield tunnel with self-stabilizing function according to claim 6, characterized in that, Gears (74) are fixedly connected to the top of both shafts (71). The two gears (74) mesh symmetrically with each other. A strip block (8) is provided on one side of one end of the gear (74). A rack (81) is provided on the side wall of the strip block (8). The rack (81) meshes with a nearby gear (74).

8. A temporary support device for a shield tunnel with self-stabilizing function according to claim 7, characterized in that, A frame plate (82) is fixedly connected to the upper external seat (7). A limit rod (83) is fixedly connected between the frame plates (82). The strip block (8) is slidably connected to the limit rod (83). A horizontal shaft (9) is rotatably connected between the frame plates (82). A secondary turntable (91) is installed and connected to one end of the horizontal shaft (9). The strip block (8) is provided with a threaded opening. The horizontal shaft (9) is a threaded rod. The strip block (8) is threadedly connected to the horizontal shaft (9).

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