Double-layer structure circular tunnel with deformation control device

Abstract

The utility model discloses a double-layer structure round tunnel with a deformation control device, and relates to the technical field of tunnels, the double-layer structure round tunnel comprises a tunnel pipe layer, the deformation control device and a lane plate fixing mechanism, the tunnel pipe layer is composed of six tunnel segments, a lower-layer lane plate is arranged at the bottom in the tunnel pipe layer, the bottom of the lower-layer lane plate is arc-shaped, and the deformation control device is arranged in the tunnel pipe layer. An upper-layer lane plate is arranged in the middle in the tunnel pipe layer; the deformation control device comprises bearing longitudinal beams, the left side and the right side of the middle in the tunnel pipe layer are fixedly connected with the two bearing longitudinal beams respectively, and the two ends of the upper layer lane plate are connected to the two bearing longitudinal beams in a lap joint mode respectively. The double-layer structure circular tunnel with the deformation control device is high in capacity of controlling deformation of the circular tunnel, has a good supporting effect on the upper-layer lane plate, can prevent the middle of the upper-layer lane plate from deforming downwards, is high in deformation resistance, has a good supporting effect on the top of the tunnel pipe layer, and can greatly improve the structural strength of the double-layer structure circular tunnel.

Description

Technical Field

[0001] The utility model relates to the technical field of tunnels, in particular to a double-layer circular tunnel with a control deformation device. Background Art

[0002] Ordinary large-diameter circular tunnels usually improve the overall stiffness of the tunnel and control deformation by assembling pipe segments with staggered seams. For a double-layer circular tunnel, the force on the circular tunnel becomes greater, especially the upper lane slab, the middle part of which is more easily deformed downward by force. The prior art proposes a double-layer circular tunnel with a deformation control device. Although it has a certain supporting effect on the tunnel pipe layer, its supporting strength for the middle part of the upper lane slab is poor and its anti-deformation ability is limited. Utility Model Content

[0003] The technical problem to be solved by the utility model is to overcome the existing defects and provide a double-layer circular tunnel with a deformation control device. The circular tunnel has a strong ability to control the deformation of the circular tunnel and has a good supporting effect on the upper lane slab, which can avoid the downward deformation of the middle part of the upper lane slab. It has strong anti-deformation ability and has a good supporting effect on the top of the tunnel pipe layer, which can greatly improve the structural strength of the double-layer circular tunnel, has high safety, and can effectively solve the problems in the background technology.

[0004] In order to achieve the above-mentioned purpose, the utility model provides the following technical solution: a double-layer circular tunnel with a control deformation device, comprising:

[0005] The tunnel tube layer is composed of six tunnel segments, a lower lane slab is arranged at the bottom of the tunnel tube layer, the bottom of the lower lane slab is arc-shaped, and an upper lane slab is arranged in the middle of the tunnel tube layer;

[0006] The control deformation device comprises a supporting longitudinal beam, an anti-deformation strut, a seat block, a supporting cross beam and a longitudinal reinforcement beam. Two supporting longitudinal beams are fixedly connected to the left and right sides of the middle part of the tunnel tube layer respectively. The two ends of the upper lane plate are respectively overlapped on the two supporting longitudinal beams, and two supporting cross beams are fixedly connected between the two supporting longitudinal beams. The middle parts of the two supporting cross beams are fixedly connected to the front and rear ends of the longitudinal reinforcement beam. The bottom of each supporting longitudinal beam is fixedly connected to the top ends of three anti-deformation struts at equal distances. The bottom end of the anti-deformation strut is fixedly connected to a seat block, and the seat block is clamped with the clamping groove at the end of the lower lane plate.

[0007] The lane slab fixing mechanism is installed at both ends of the upper lane slab.

[0008] Six tunnel segments are assembled with staggered seams to form a cylindrical tunnel tube layer, which constitutes the main body of the circular tunnel. The shape of the bottom of the lower lane slab matches the bottom of the tunnel tube layer to prevent the bottom of the lower lane slab from being displaced in the tunnel tube layer. The controlled deformation device is used to support and reinforce the two sides of the tunnel tube layer and the bottom of the upper lane slab. The seat block fixes the bottom of the anti-deformation strut at the end of the lower lane slab, and the top of the anti-deformation strut supports the supporting longitudinal beam, thereby supporting and reinforcing the two sides of the tunnel tube layer. The supporting longitudinal beam, supporting cross beam and longitudinal reinforcement beam support the bottom of the upper lane slab, especially the longitudinal reinforcement beam supports the middle part of the upper lane slab. The lane slab fixing mechanism is used to reinforce the two ends of the upper lane slab to prevent the upper lane slab from being displaced in the tunnel tube layer. The tunnel tube layer has strong deformation resistance and high safety.

[0009] Furthermore, the control deformation device also includes an anti-deformation sleeve, a reinforcement rod and an arc fixing plate. The middle part of each anti-deformation support rod is fixedly sleeved with an anti-deformation sleeve. The side of the anti-deformation sleeve away from the lower lane plate is fixedly connected to one end of the reinforcement rod. The other end of the reinforcement rod passes through the tunnel pipe layer and is fixedly connected to the arc fixing plate. The anti-deformation sleeve strengthens the middle part of the anti-deformation support rod. The position of the anti-deformation sleeve is fixed by the cooperation of the reinforcement rod and the arc fixing plate, thereby improving the strength of the anti-deformation support rod and preventing the anti-deformation support rod from deforming. The anti-deformation support rod can provide good support for the supporting longitudinal beam, improve the strength of both sides of the tunnel pipe layer, and also provide good support for the upper lane plate.

[0010] Furthermore, the control deformation device also includes a diamond-shaped reinforcement frame and a positioning column. Two diamond-shaped reinforcement frames are fixedly connected between the two supporting beams. The tops of the two ends of the diamond-shaped reinforcement frame are respectively fixedly connected with vertical positioning columns. The tops of the positioning columns cooperate with the positioning holes at the bottom of the upper lane plate. The diamond-shaped reinforcement frame can increase the support area of ​​the upper lane plate and improve the support effect. With the help of the positioning column, the diamond-shaped reinforcement frame and the upper lane plate can be firmly positioned to avoid relative displacement between the two.

[0011] Furthermore, the deformation control device further includes an arch frame and a support block, and two corresponding anti-deformation sleeves on the left and right are respectively fixedly connected to the two ends of an arch frame, and the top center of the arch frame is fixedly connected to a support block, and the top of the support block abuts against the bottom of the longitudinal reinforcement beam. The top of the arch frame supports the longitudinal reinforcement beam through the support block, which can greatly improve the anti-deformation ability of the middle part of the upper lane slab.

[0012] Furthermore, the lane plate fixing mechanism includes an end plate, a pressure plate and a fixing column. An end plate is provided between the two ends of the upper lane plate and the inner wall of the tunnel tube layer. The bottom of the end plate is connected to the top of the supporting longitudinal beam. The top of the end plate is integrally connected to a pressure plate on one side near the middle of the upper lane plate. The end of the pressure plate is fixedly connected to the upper lane plate through a fixing column. The end plate fills the gap between the two ends of the upper lane plate and the tunnel tube layer. The pressure plate cooperates with the fixing column to fix the two ends of the upper lane plate, thereby improving the installation stability of the upper lane plate.

[0013] Furthermore, it also includes a lane plate anti-displacement assembly, which includes a positioning block and an anchor rod. The bottom center of the lower lane plate is fixedly connected with a positioning block, which passes through a rectangular through slot at the bottom of the tunnel tube layer, and the bottom of the positioning block is fixedly connected with anchor rods at equal distances. The positioning block and the anchor rod fix the position of the lower lane plate to prevent the lower lane plate from displacement and improve the overall strength.

[0014] Furthermore, a reinforcing plate is also included, and the reinforcing plate is embedded in the middle of the inner side of the upper lane plate. The reinforcing plate is made of a steel plate, which can improve the strength of the upper lane plate and prevent the middle part of the upper lane plate from being deformed.

[0015] Furthermore, it also includes a reinforcement support mechanism, which includes a top support plate, a mounting column and a V-shaped support rod. A top support plate is arranged at the top of the tunnel pipe layer, and the top of the top support plate is fixedly connected with the mounting column, and the mounting column passes through the mounting hole at the top of the tunnel pipe layer. The two sides of the top support plate are respectively connected to the top of the pressure plate through V-shaped support rods arranged at equal distances. The top support plate is fixed to the top of the tunnel pipe layer through the mounting column, and the V-shaped support rod supports the top support plate to improve the anti-deformation ability of the top of the tunnel pipe layer.

[0016] Furthermore, the reinforcement support mechanism further comprises an oblique rod, and the two ends of each V-shaped support rod are respectively fixedly connected to the two ends of the oblique rod. The oblique rod can improve the strength of the V-shaped support rod and improve the supporting effect on the top of the tunnel pipe layer.

[0017] Furthermore, the reinforcement support mechanism also includes an arc pad and an insertion rod, and the top of the bend of each V-shaped support rod is fixedly connected with an arc pad, the arc pad is against the inner wall of the tunnel pipe layer, and the insertion rod is fixedly connected to the arc pad, and the insertion rod is plugged into the plug hole on the tunnel pipe layer. The arc pad can increase the contact area between the V-shaped support rod and the inner wall of the tunnel pipe layer, and improve the support effect of the V-shaped support rod on the inner wall of the tunnel pipe layer, and the insertion rod can prevent the arc pad from being displaced relative to the tunnel pipe layer.

[0018] Compared with the prior art, the utility model has the following beneficial effects: the double-layer circular tunnel with a control deformation device has the following advantages:

[0019] 1. The seat block fixes the bottom of the anti-deformation support rod to the end of the lower lane plate, and the top of the anti-deformation support rod supports the supporting longitudinal beam, thereby supporting and reinforcing both sides of the tunnel pipe layer. The supporting longitudinal beam, supporting cross beam and longitudinal reinforcement beam support the bottom of the upper lane plate, especially the longitudinal reinforcement beam supports the middle part of the upper lane plate. The lane plate fixing mechanism is used to reinforce the two ends of the upper lane plate to prevent the upper lane plate from displacement in the tunnel pipe layer. The tunnel pipe layer has strong anti-deformation ability.

[0020] 2. It has a strong ability to control the deformation of circular tunnels and has a good supporting effect on the upper lane slab, which can prevent the middle part of the upper lane slab from deforming downward. It has a strong anti-deformation ability and has a good supporting effect on the top of the tunnel pipe layer, which can greatly improve the structural strength of the double-layer circular tunnel and has high safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the structure of the utility model;

[0022] Figure 2 It is a schematic diagram of the structure of the utility model when viewed from above.

[0023] In the figure: 1 tunnel pipe layer, 2 upper lane slab, 3 lower lane slab, 4 deformation control device, 41 supporting longitudinal beam, 42 anti-deformation support rod, 43 seat block, 44 anti-deformation sleeve, 45 reinforcement rod, 46 arc fixing plate, 47 supporting cross beam, 48 longitudinal reinforcement beam, 49 diamond reinforcement frame, 410 positioning column, 411 arch frame, 412 support block, 5 lane slab anti-displacement assembly, 51 positioning block, 52 anchor rod, 6 reinforcement support mechanism, 61 top support plate, 62 installation column, 63 V-shaped support rod, 64 oblique rod, 65 arc pad, 66 insertion rod, 7 lane slab fixing mechanism, 71 end plate, 72 pressure plate, 73 fixing column, 8 reinforcement plate. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] For example, see Figures 1 to 2 , the utility model provides a technical solution: a double-layer circular tunnel with a control deformation device, comprising a tunnel tube layer 1, a control deformation device 4 and a lane plate fixing mechanism 7;

[0026] The tunnel tube layer 1 is composed of six tunnel segments. A lower lane slab 3 is arranged at the bottom of the tunnel tube layer 1. The bottom of the lower lane slab 3 is arc-shaped. An upper lane slab 2 is arranged in the middle of the tunnel tube layer 1.

[0027] It also includes a reinforcing plate 8, which is inlaid in the middle of the inner side of the upper lane plate 2. The reinforcing plate 8 is made of a steel plate, which can improve the strength of the upper lane plate 2 and prevent the middle part of the upper lane plate 2 from being deformed.

[0028] The deformation control device 4 includes a supporting longitudinal beam 41, an anti-deformation strut 42, a seat block 43, a supporting cross beam 47 and a longitudinal reinforcement beam 48. Two supporting longitudinal beams 41 are fixedly connected to the left and right sides of the middle part of the tunnel pipe layer 1, and the two ends of the upper lane slab 2 are respectively overlapped on the two supporting longitudinal beams 41, and two supporting cross beams 47 are fixedly connected between the two supporting longitudinal beams 41. The middle of the two supporting cross beams 47 is fixedly connected to the front and rear ends of the longitudinal reinforcement beam 48. The bottom of each supporting longitudinal beam 41 is fixedly connected to the top of three anti-deformation struts 42 at equal distances, and the bottom of the anti-deformation strut 42 is fixedly connected to the seat block 43, and the seat block 43 is clamped with the slot at the end of the lower lane slab 3;

[0029] The control deformation device 4 also includes an anti-deformation sleeve 44, a reinforcement rod 45 and an arc fixing plate 46. The middle part of each anti-deformation strut 42 is fixedly sleeved with an anti-deformation sleeve 44. The side of the anti-deformation sleeve 44 away from the lower lane slab 3 is fixedly connected to one end of the reinforcement rod 45. The other end of the reinforcement rod 45 passes through the tunnel pipe layer 1 and is fixedly connected to the arc fixing plate 46. The anti-deformation sleeve 44 strengthens the middle part of the anti-deformation strut 42. The position of the anti-deformation sleeve 44 is fixed by the cooperation of the reinforcement rod 45 and the arc fixing plate 46, so as to improve the strength of the anti-deformation strut 42 and prevent the anti-deformation strut 42 from deformation. The anti-deformation strut 42 can provide good support for the supporting longitudinal beam 41, improve the strength of both sides of the tunnel pipe layer 1, and also provide good support for the upper lane slab 2.

[0030] The control deformation device 4 also includes a diamond-shaped reinforcement frame 49 and a positioning column 410. Two diamond-shaped reinforcement frames 49 are fixedly connected between the two supporting beams 47. The tops of the two ends of the diamond-shaped reinforcement frame 49 are respectively fixedly connected with vertical positioning columns 410. The tops of the positioning columns 410 cooperate with the positioning holes at the bottom of the upper lane plate 2. The diamond-shaped reinforcement frame 49 can increase the support area of ​​the upper lane plate 2 and improve the support effect. With the help of the positioning columns 410, the diamond-shaped reinforcement frame 49 and the upper lane plate 2 can be firmly positioned to avoid relative displacement between the two.

[0031] The deformation control device 4 further includes an arch frame 411 and a support block 412. Two corresponding anti-deformation sleeves 44 on the left and right are respectively fixedly connected to the two ends of an arch frame 411. The top center of the arch frame 411 is fixedly connected to a support block 412, and the top of the support block 412 abuts against the bottom of the longitudinal reinforcement beam 48. The top of the arch frame 411 supports the longitudinal reinforcement beam 48 through the support block 412, which can greatly improve the anti-deformation ability of the middle part of the upper lane slab 2.

[0032] The track plate fixing mechanism 7 is installed at both ends of the upper track plate 2 .

[0033] The lane plate fixing mechanism 7 includes an end plate 71, a pressure plate 72 and a fixing column 73. The end plates 71 are arranged between the two ends of the upper lane plate 2 and the inner wall of the tunnel pipe layer 1. The bottom of the end plate 71 is connected to the top of the supporting longitudinal beam 41. The top of the end plate 71 is integrally connected to the pressure plate 72 on one side near the middle of the upper lane plate 2. The end of the pressure plate 72 is fixedly connected to the upper lane plate 2 through the fixing column 73. The end plate 71 fills the gap between the two ends of the upper lane plate 2 and the tunnel pipe layer 1. The pressure plate 72 cooperates with the fixing column 73 to fix the two ends of the upper lane plate 2, thereby improving the installation stability of the upper lane plate 2.

[0034] When in use, six tunnel segments are assembled through staggered seams to form a cylindrical tunnel tube layer 1, which constitutes the main body of the circular tunnel. The shape of the bottom of the lower lane plate 3 cooperates with the bottom of the tunnel tube layer 1 to prevent the lower lane plate 3 from displacing at the bottom of the tunnel tube layer 1. The control deformation device 4 is used to support and reinforce the two sides of the tunnel tube layer 1 and the bottom of the upper lane plate 2. The seat block 43 fixes the bottom of the anti-deformation strut 42 to the end of the lower lane plate 3. The top of the anti-deformation strut 42 supports the supporting longitudinal beam 41, thereby supporting and reinforcing the two sides of the tunnel tube layer 1. The supporting longitudinal beam 41, the supporting cross beam 47 and the longitudinal reinforcement beam 48 support the bottom of the upper lane plate 2, especially the longitudinal reinforcement beam 48 supports the middle part of the upper lane plate 2. The lane plate fixing mechanism 7 is used to reinforce the two ends of the upper lane plate 2 to prevent the upper lane plate 2 from displacing in the tunnel tube layer 1. The tunnel tube layer 1 has strong deformation resistance and high safety.

[0035] For example 2, please refer to Figures 1 to 2 The utility model provides a technical solution: a double-layer circular tunnel with a control deformation device. The structure of this embodiment is roughly the same as that of the first embodiment, except that:

[0036] It also includes a lane plate anti-displacement component 5, which includes a positioning block 51 and an anchor rod 52. The bottom center of the lower lane plate 3 is fixedly connected with the positioning block 51, the positioning block 51 passes through the rectangular through groove at the bottom of the tunnel pipe layer 1, and the bottom of the positioning block 51 is fixedly connected with the anchor rod 52 at equal distances.

[0037] The positioning block 51 and the anchor rod 52 fix the position of the lower lane slab 3 to prevent the lower lane slab 3 from displacement and improve the overall strength.

[0038] For example 3, please refer to Figures 1 to 2 The utility model provides a technical solution: a double-layer circular tunnel with a control deformation device. The structure of this embodiment is roughly the same as that of the second embodiment, except that:

[0039] It also includes a reinforcement support mechanism 6, which includes a top support plate 61, a mounting column 62 and a V-shaped support rod 63. A top support plate 61 is arranged on the top of the tunnel pipe layer 1, and a mounting column 62 is fixedly connected to the top of the top support plate 61. The mounting column 62 passes through the mounting hole on the top of the tunnel pipe layer 1. Both sides of the top support plate 61 are connected to the top of the pressure plate 72 through V-shaped support rods 63 arranged at equal distances.

[0040] The top support plate 61 is fixed to the top of the tunnel pipe layer 1 through the mounting column 62 , and the V-shaped support rod 63 supports the top support plate 61 to improve the anti-deformation capability of the top of the tunnel pipe layer 1 .

[0041] The reinforcement support mechanism 6 further includes an oblique rod 64, and the two ends of each V-shaped support rod 63 are respectively fixedly connected to the two ends of the oblique rod 64. The oblique rod 64 can improve the strength of the V-shaped support rod 63 and improve the supporting effect on the top of the tunnel pipe layer 1.

[0042] The reinforcement support mechanism 6 also includes an arc pad 65 and an insertion rod 66. The top of the bend of each V-shaped support rod 63 is fixedly connected with an arc pad 65. The arc pad 65 rests on the inner wall of the tunnel pipe layer 1, and the arc pad 65 is fixedly connected with an insertion rod 66. The insertion rod 66 is plugged into the socket on the tunnel pipe layer 1.

[0043] The arc pad 65 can increase the contact area between the V-shaped support rod 63 and the inner wall of the tunnel pipe layer 1, thereby improving the supporting effect of the V-shaped support rod 63 on the inner wall of the tunnel pipe layer 1, and the insertion rod 66 can prevent the arc pad 65 from being displaced relative to the tunnel pipe layer 1.

[0044] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0045] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A double-layer circular tunnel with a controlled deformation device, characterized in that: include: The tunnel tube layer (1) is composed of six tunnel segments, a lower lane slab (3) is arranged at the bottom of the tunnel tube layer (1), the bottom of the lower lane slab (3) is arc-shaped, and an upper lane slab (2) is arranged in the middle of the tunnel tube layer (1); The control deformation device (4) comprises a supporting longitudinal beam (41), an anti-deformation strut (42), a seat block (43), a supporting cross beam (47) and a longitudinal reinforcement beam (48). Two supporting longitudinal beams (41) are fixedly connected to the left and right sides of the middle part of the tunnel pipe layer (1), respectively. The two ends of the upper lane plate (2) are respectively overlapped on the two supporting longitudinal beams (41), and two supporting cross beams (47) are fixedly connected between the two supporting longitudinal beams (41). The middle parts of the two supporting cross beams (47) are fixedly connected to the front and rear ends of the longitudinal reinforcement beam (48). The bottom of each supporting longitudinal beam (41) is fixedly connected to the top ends of three anti-deformation struts (42) at equal distances. The bottom end of the anti-deformation strut (42) is fixedly connected to the seat block (43), and the seat block (43) is clamped with the clamping groove at the end of the lower lane plate (3); The track plate fixing mechanism (7) is installed at both ends of the upper track plate (2).

2. A double-layer circular tunnel with a controlled deformation device according to claim 1, characterized in that: The deformation control device (4) further comprises an anti-deformation sleeve (44), a reinforcement rod (45) and an arc fixing plate (46); the middle part of each anti-deformation support rod (42) is fixedly sleeved with the anti-deformation sleeve (44); one end of the reinforcement rod (45) is fixedly connected to the side of the anti-deformation sleeve (44) away from the lower lane plate (3); the other end of the reinforcement rod (45) passes through the tunnel pipe layer (1) and is fixedly connected to the arc fixing plate (46).

3. A double-layer circular tunnel with a controlled deformation device according to claim 1, characterized in that: The control deformation device (4) further comprises a diamond-shaped reinforcement frame (49) and a positioning column (410), wherein the two diamond-shaped reinforcement frames (49) are fixedly connected between the two supporting beams (47), and the tops of both ends of the diamond-shaped reinforcement frame (49) are respectively fixedly connected with vertical positioning columns (410), and the tops of the positioning columns (410) cooperate with the positioning holes at the bottom of the upper lane plate (2).

4. The double-layer circular tunnel with a controlled deformation device according to claim 1, characterized in that: The deformation control device (4) further comprises an arch frame (411) and a support block (412), wherein two corresponding anti-deformation sleeves (44) on the left and right are respectively fixedly connected to two ends of an arch frame (411), and the support block (412) is fixedly connected to the top center of the arch frame (411), and the top of the support block (412) abuts against the bottom of the longitudinal reinforcement beam (48).

5. The double-layer circular tunnel with a controlled deformation device according to claim 1, characterized in that: The lane plate fixing mechanism (7) comprises an end plate (71), a pressure plate (72) and a fixing column (73); the end plates (71) are arranged between the two ends of the upper lane plate (2) and the inner wall of the tunnel tube layer (1); the bottom of the end plate (71) is connected to the top of the supporting longitudinal beam (41); the top of the end plate (71) is integrally connected to the pressure plate (72) on one side close to the middle of the upper lane plate (2); the end of the pressure plate (72) is fixedly connected to the upper lane plate (2) via a fixing column (73).

6. The double-layer circular tunnel with a controlled deformation device according to claim 1, characterized in that: The invention also comprises a lane plate anti-displacement assembly (5), wherein the lane plate anti-displacement assembly (5) comprises a positioning block (51) and an anchor rod (52), wherein the positioning block (51) is fixedly connected to the center of the bottom of the lower lane plate (3), the positioning block (51) passes through a rectangular through groove at the bottom of the tunnel pipe layer (1), and the bottom of the positioning block (51) is fixedly connected to the anchor rod (52) at equal distances.

7. The double-layer circular tunnel with a controlled deformation device according to claim 1, characterized in that: It also comprises a reinforcing plate (8), and the reinforcing plate (8) is inlaid in the middle part of the inner side of the upper lane plate (2).

8. The double-layer circular tunnel with a controlled deformation device according to claim 5, characterized in that: It also comprises a reinforcement support mechanism (6), the reinforcement support mechanism (6) comprising a top support plate (61), a mounting column (62) and a V-shaped support rod (63), the top of the tunnel pipe layer (1) is provided with a top support plate (61), the top of the top support plate (61) is fixedly connected with the mounting column (62), the mounting column (62) passes through the mounting hole at the top of the tunnel pipe layer (1), and the two sides of the top support plate (61) are respectively connected to the top of the pressure plate (72) through V-shaped support rods (63) arranged at equal distances.

9. A double-layer circular tunnel with a controlled deformation device according to claim 8, characterized in that: The reinforcement support mechanism (6) further comprises an oblique rod (64), and the two ends of each V-shaped support rod (63) are respectively fixedly connected to the two ends of the oblique rod (64).

10. The double-layer circular tunnel with a controlled deformation device according to claim 8, characterized in that: The reinforcing support mechanism (6) further comprises an arc pad (65) and an insertion rod (66); the top of the bending part of each V-shaped support rod (63) is fixedly connected to an arc pad (65); the arc pad (65) abuts against the inner wall of the tunnel pipe layer (1); and the insertion rod (66) is fixedly connected to the arc pad (65); the insertion rod (66) is plugged into the insertion hole on the tunnel pipe layer (1).

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