Shield tunnel anti-deformation emergency supporting equipment

Abstract

The invention relates to the technical field of tunnel supporting equipment, in particular to shield tunnel anti-deformation emergency supporting equipment which comprises a supporting base and further comprises a folding supporting part, the folding supporting part is located in the middle of the supporting base, and a supporting driving assembly is further arranged on the folding supporting part; a plurality of folding type supporting frames are arranged on the supporting driving assembly, and a supporting rod is installed on each folding type supporting frame; under the driving action of the supporting driving assembly, in the supporting state, the multiple supporting rods are of a fan-shaped arrangement structure to support the inner wall of the tunnel, and in the storage state, the multiple supporting rods are of a stacked arrangement structure to be located on the supporting base. According to the anti-deformation emergency supporting equipment for the shield tunnel, deformation of the supporting rods which are pressed too much can be avoided, dynamic reconstruction of supporting of the inner wall of the tunnel can be achieved, the optimal supporting effect is achieved, and the stability of emergency supporting is guaranteed.

Description

Technical Field

[0001] The invention relates to the technical field of tunnel support equipment, in particular to an anti-deformation emergency support equipment for a shield tunnel. Background Art

[0002] With the acceleration of urbanization, the scale of underground space development continues to expand. Shield tunnels are widely used in the construction of infrastructure such as subways, railways, and highways as an efficient and safe construction method. However, complex geological conditions (such as uneven soft and hard strata, high water pressure environment, fault fracture zones, etc.) and construction disturbances (such as mechanical vibration, changes in soil stress field) can easily cause tunnel structure deformation or collapse risks. Especially in high-risk areas (such as crossing existing subway lines and near important buildings), traditional support measures may be difficult to cope with sudden deformation, and an emergency support device that can respond quickly and actively control is urgently needed. Against this background, shield tunnel anti-deformation emergency support equipment came into being.

[0003] The existing shield tunnel anti-deformation emergency support equipment, during local emergency use, the structure of the support equipment is usually fixed, and it cannot be dynamically reconstructed according to the changes in the supporting parts, resulting in poor support effect, affecting the stability of the support, and may even cause local collapse. At the same time, it is also very inconvenient to disassemble and assemble the support equipment with a fixed structure. Therefore, in view of the above situation, it is urgent to develop a shield tunnel anti-deformation emergency support equipment to overcome the shortcomings in current practical applications. Summary of the invention

[0004] The object of the present invention is to provide a shield tunnel anti-deformation emergency support device to solve the problems raised in the above background technology.

[0005] To achieve the above object, the present invention provides the following technical solutions: A shield tunnel anti-deformation emergency support device, comprising a support base and a folding support portion, wherein the folding support portion is located in the middle of the support base, and a support drive assembly is also arranged on the folding support portion; The support drive assembly is provided with a plurality of foldable support frames, and each of the foldable support frames is installed with a support rod; Wherein, under the driving action of the support driving assembly, in the supporting state, a structure in which a plurality of support rods are arranged in a fan shape supports the inner wall of the tunnel, and in the storage state, a structure in which a plurality of support rods are arranged in a superimposed manner is located on the support base; The support base is also provided with a hydraulic control system for controlling the opening and closing of the support drive assembly and adjusting the support position of the support rod, thereby realizing dynamic reconstruction of the tunnel inner wall support.

[0006] As a further solution of the present invention: the support drive assembly includes: A support shaft, the support shaft is fixedly mounted on the folding support portion, and a plurality of adjusting gears are rotatably mounted on the support shaft, and the folding support frame is fixedly mounted on each of the adjusting gears; A limiting slide groove, wherein the limiting slide groove is located on the supporting base, and the number of the limiting slide grooves is equal to the number of the supporting shafts, and a plurality of the limiting slide grooves are respectively located directly below the plurality of the supporting shafts; Wherein, a movable tooth plate is slidably installed in each of the limiting sliding grooves, and the movable tooth plate is meshed and connected with the adjusting gear; and an angle adjustment unit, wherein the angle adjustment unit is respectively connected to the support base and the movable tooth plate, and is connected to the hydraulic control system.

[0007] As a further solution of the present invention: the angle adjustment unit includes: A drive control frame, the drive control frame is fixedly mounted on the support base, and the hydraulic control system is also arranged on the drive control frame; A hydraulic telescopic cylinder, wherein the number of the hydraulic telescopic cylinders is multiple, the multiple hydraulic telescopic cylinders are respectively located directly above the multiple limiting slide grooves, and the multiple hydraulic telescopic cylinders are all fixedly connected to the drive control frame; Wherein, each of the hydraulic telescopic cylinders is connected to the hydraulic control system via hydraulic pipe 2; And a connecting plate, one end of which is fixedly connected to the output end of the hydraulic telescopic cylinder, and the other end of the connecting plate is fixedly installed with a push-pull rod, which is fixedly connected to the movable tooth plate.

[0008] As a further solution of the present invention: the hydraulic control system includes a hydraulic pipe 1 and an external joint, the number of the hydraulic pipe 1 is multiple, and the two ends of the multiple hydraulic pipes 1 are respectively connected to the foldable support frame and the hydraulic control system; The hydraulic control system is also connected to an external hydraulic device via an external joint, wherein the working state of the hydraulic control system is controlled by a plurality of pressure sensors arranged on the support rod.

[0009] As a further solution of the present invention: the process of the hydraulic control system performing dynamic reconstruction is as follows: (1) When the pressure sensor detects the pressure value P of a certain supported rod under pressure i ≥0.8P max When the hydraulic control system controls the adjacent support rods to move at a speed v retract =0.2L max / s contraction; (2) The support drive assembly drives the adjacent support rods to rotate toward the compressed support rod at a speed of ω = 5° / s, forming a strengthened support area with an angle less than 15°; (3) The hydraulic control system controls the adjacent support rods again to v extend =0.1L max / s stretching, causing the load on the compressed support rod to drop to 65%-75% of the original value.

[0010] As a further solution of the present invention: the contraction displacement of adjacent support rods is calculated according to the following formula: ; Among them, ΔL is the shrinkage displacement of adjacent support rods, k is the empirical coefficient, and L max is the maximum travel of the support rod, tanh is the hyperbolic tangent function, P alert is the warning threshold, P action is the action threshold, P i is the measured pressure of the compressed support rod.

[0011] As a further solution of the present invention: when the pressure change rate is detected to be greater than 0.1P max / s, the hydraulic control system automatically expands the reconstruction range to more than two adjacent support rods.

[0012] As a further solution of the present invention: each of the support rods is provided with a close support plate; The close support plate is also provided with a detection component for monitoring the compression deformation of the foldable support frame and the support rod.

[0013] As a further solution of the present invention: the detection component comprises: A protective storage groove, the protective storage groove is opened on the close support plate, wherein the protective storage groove is an L-shaped structure, and the two ends of the protective storage groove respectively pass through the top and the side of the close support plate; A lifting block, the lifting block is slidably mounted on one end of the protective storage slot and is located on the top of the close support plate, and the bottom end of the lifting block is also connected to the inner wall of the protective storage slot through a return spring; A driving inclined block, the driving inclined block is slidably mounted in the protective storage groove and is slidably connected to the bottom end of the lifting block; A connecting rod, one end of which is fixedly connected to the driving inclined block, and a sliding plate is fixedly mounted on the connecting rod, the sliding plate is slidably connected to the protective storage groove, and a storage spring is fixedly mounted on the sliding plate; Wherein, the storage spring is sleeved on the connecting rod, and the other end of the storage spring is fixedly connected to the inner wall of the protective storage groove; and a detection plug, which is fixedly connected to the other end of the connecting rod, and when the lifting block is not under pressure, the detection plug is retracted in the protective storage groove and is located at the side of the support plate; Wherein, protective sinks are provided on both sides of the detection plug, and imaging equipment and laser detection equipment are respectively installed in the two protective sinks.

[0014] As a further solution of the present invention: the contact surface between the support plate and the inner wall of the tunnel is further provided with an elastic buffer layer, whose elastic modulus E=50-100MPa.

[0015] Compared with the prior art, the present invention has the following beneficial effects: 1. According to the situation of the tunnel, the hydraulic control system can control the start of the support drive assembly to drive the rotation of multiple folding support frames in the overlapping arrangement structure, and finally make the multiple folding support frames in a fan-shaped arrangement structure to achieve uniform support for various parts of the inner wall of the tunnel. Among them, since the multiple support rods in the storage state are in a superimposed state, that is, in the storage state, the multiple support rods are parallel to each other and stand in the middle of the support base in the same longitudinal plane, so that the storage volume is reduced by more than %, ensuring the safety of transportation and the rapid deployment of the tunnel support position. It is simple to operate and easy to disassemble and assemble, and the support rods can be accurately positioned within the range of 90°-180°; 2. After the structure of multiple support rods arranged in a fan shape reaches the specified angle, under the control of the hydraulic control system, the support rods can be extended outward in the foldable support frame until the top of the support rod contacts the inner wall of the tunnel and stops after reaching the set pressure, thereby achieving uniform support for the inner wall of the tunnel and ensuring the support effect; 3. In the process of multiple support rods supporting the inner wall of the tunnel, when the pressure sensor on a certain support rod detects that the pressure is too large, the pressure sensor transmits the detection signal to the hydraulic control system. Under the control of the hydraulic control system, the adjacent support rods of the compressed support rod are quickly contracted. At the same time, the support drive assembly drives the adjacent support rods to approach the compressed support rod, and then controls the adjacent support rods to extend rapidly, thereby forming a reinforced support area with an angle of less than 15°. On the one hand, it can avoid deformation of the support rods under excessive pressure, so that the load of the compressed support rods is reduced to 65%-75% of the original value. On the other hand, it can realize dynamic reconstruction of the tunnel inner wall support to achieve the best support effect, ensure the stability of the emergency support, and avoid the occurrence of safety accidents.

[0016] 4. Through multi-level collaborative control and material-structure coupling design, under sudden landslide conditions: the system response time is shortened to 1.5 seconds, 60% faster than the traditional solution; and based on the multi-sensor fusion algorithm, the support failure warning accuracy is greater than 95%. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the three-dimensional structure of the anti-deformation emergency support equipment for a shield tunnel in an embodiment of the present invention.

[0018] Figure 2 It is a schematic diagram of the three-dimensional structure of the foldable support frame in the folded state according to the embodiment of the present invention.

[0019] Figure 3 It is a schematic diagram of the three-dimensional structure of the push-pull rod distribution in an embodiment of the present invention.

[0020] Figure 4 It is a schematic diagram of the cross-sectional structure of the support shaft in an embodiment of the present invention.

[0021] Figure 5 It is a schematic diagram of the three-dimensional structure of the distribution of the movable tooth plates in an embodiment of the present invention.

[0022] Figure 6 Schematic diagram of the three-dimensional structure of the support rod in an embodiment of the present invention.

[0023] Figure 7 It is a schematic diagram of the three-dimensional structure for adjusting the gear distribution in an embodiment of the present invention.

[0024] Figure 8 It is a schematic diagram of the main structure of the close support plate in an embodiment of the present invention.

[0025] Fig. 9 It is a schematic diagram of the enlarged structure of the drive control frame in an embodiment of the present invention.

[0026] Fig.10 It is a schematic diagram of the three-dimensional structure of the hydraulic control system in an embodiment of the present invention.

[0027] Fig.11 It is a schematic diagram of the three-dimensional structure of the driving inclined block in an embodiment of the present invention.

[0028] Fig.12 It is a structural schematic diagram of the installation position of the laser detection equipment in an embodiment of the present invention.

[0029] Fig.13 It is a schematic diagram of the three-dimensional structure of the plug detection device in an embodiment of the present invention.

[0030] Fig.14 It is a schematic diagram of the main structure of the foldable support frame in the embodiment of the present invention in the unfolded state.

[0031] In the figure: 1-support base, 2-folding support part, 3-drive control frame, 4-hydraulic control system, 5-hydraulic pipe one, 6-folding support frame, 7-support rod, 8-close support plate, 9-movable tooth plate, 10-adjusting gear, 11-limiting slide groove, 12-push-pull rod, 13-connecting plate, 14-hydraulic telescopic cylinder, 15-hydraulic pipe two, 16-external joint, 17-support shaft, 18-protective storage groove, 19-lifting block, 20-detection plug, 21-drive inclined block, 22-sliding plate, 23-storage spring, 24-connecting rod, 25-protective sink groove, 26-imaging equipment, 27-laser detection equipment. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] The specific implementation of the present invention is described in detail below in conjunction with specific embodiments.

[0034] See also Figure 1-Figure 14 , an embodiment of the present invention provides a shield tunnel anti-deformation emergency support device, comprising a support base 1, and also comprising a folding support part 2, wherein the folding support part 2 is located in the middle of the support base 1, and a support driving component is also arranged on the folding support part 2; The support drive assembly is provided with a plurality of foldable support frames 6, and each of the foldable support frames 6 is installed with a support rod 7; Wherein, under the driving action of the support driving assembly, in the supporting state, a plurality of support rods 7 are arranged in a fan-shaped structure to support the inner wall of the tunnel, and in the storage state, a plurality of support rods 7 are arranged in a superimposed structure and are located on the support base 1; The support base 1 is also provided with a hydraulic control system 4 for controlling the opening and closing of the support drive assembly and adjusting the support position of the support rod 7, so as to realize dynamic reconstruction of the tunnel inner wall support.

[0035] When emergency support is performed on a tunnel, first, the support base 1 can be transported to the designated support position, wherein the support base 1 can be fixedly connected to other components or the ground on the designated support position by bolts to ensure the stability of the support base 1 during the entire support process. Then, according to the situation of the tunnel, the hydraulic control system 4 controls the start of the support drive assembly to drive the rotation of multiple folding support frames 6 in a stacked arrangement structure, and finally makes the multiple folding support frames 6 in a fan-shaped arrangement structure to achieve uniform support for various parts of the inner wall of the tunnel. Among them, since the multiple support rods 7 in the storage state are in a stacked state, that is, in the storage state, the multiple support rods 7 are parallel to each other and in the same longitudinal plane and stand in the middle position of the support base 1 (the longitudinal axis of each support rod 7 is parallel to the central axis of the support base 1, and the distance between adjacent rods can be less than or equal to 0.2D, D is the diameter of the support rod 7, such as Figure 1 As shown), the storage volume is reduced by more than 40%, ensuring transportation safety and rapid deployment of the tunnel support position, and the operation is simple and easy to disassemble and assemble, so as to achieve accurate positioning of the support rod 7 within the range of 90°-180°; after the multiple support rods 7 are arranged in a fan-shaped structure and reach the specified angle, under the control of the hydraulic control system 4, the support rod 7 can be extended outward in the foldable support frame 6 until the top of the support rod 7 contacts the inner wall of the tunnel and stops after reaching the set pressure, thereby achieving uniform support for the inner wall of the tunnel and ensuring the support effect; in addition, in the process of multiple support rods 7 supporting the inner wall of the tunnel, when the pressure sensor on a certain support rod 7 When excessive pressure is detected, the pressure sensor transmits a detection signal to the hydraulic control system 4. Under the control of the hydraulic control system 4, the adjacent support rods 7 of the compressed support rod 7 are rapidly contracted. At the same time, the support drive assembly drives the adjacent support rods 7 to approach the compressed support rod 7, and then controls the adjacent support rods 7 to extend rapidly, thereby forming a reinforced support area with an angle less than 15°. On the one hand, it can avoid deformation of the support rods 7 under excessive pressure, so that the load of the compressed support rods 7 is reduced to 65%-75% of the original value. On the other hand, it can realize dynamic reconstruction of the tunnel inner wall support to achieve the best support effect, ensure the stability of the emergency support, and avoid the occurrence of safety accidents.

[0036] In one embodiment of the present invention, see Figure 1-Figure 13 , the support drive assembly comprises: A support shaft 17, wherein the support shaft 17 is fixedly mounted on the folding support portion 2, and a plurality of adjusting gears 10 are rotatably mounted on the support shaft 17, and each of the adjusting gears 10 is fixedly mounted with the folding support frame 6; A limiting slide groove 11, wherein the limiting slide groove 11 is located on the support base 1, and the number of the limiting slide grooves 11 is equal to the number of the support shafts 17, and the plurality of limiting slide grooves 11 are respectively located directly below the plurality of support shafts 17; Among them, a movable tooth plate 9 is slidably installed in each of the limiting slide grooves 11, and the movable tooth plate 9 is meshingly connected with the adjusting gear 10; wherein, the meshing portion between the adjusting gear 10 and the movable tooth plate 9 may also be provided with a sealing cover, and the sealing cover is filled with grease.

[0037] And an angle adjustment unit, wherein the angle adjustment unit is respectively connected to the support base 1 and the movable tooth plate 9, and is connected to the hydraulic control system 4.

[0038] The angle adjustment unit comprises: A driving control frame 3, wherein the driving control frame 3 is fixedly mounted on the supporting base 1, and the hydraulic control system 4 is also arranged on the driving control frame 3; A hydraulic telescopic cylinder 14, wherein the number of the hydraulic telescopic cylinders 14 is multiple, and the multiple hydraulic telescopic cylinders 14 are respectively located directly above the multiple limiting slide grooves 11, and the multiple hydraulic telescopic cylinders 14 are fixedly connected to the driving control frame 3; Wherein, each of the hydraulic telescopic cylinders 14 is connected to the hydraulic control system 4 via a hydraulic pipe 15; And a connecting plate 13, one end of which is fixedly connected to the output end of the hydraulic telescopic cylinder 14, and a push-pull rod 12 is fixedly installed on the other end of the connecting plate 13, and the push-pull rod 12 is fixedly connected to the movable toothed plate 9.

[0039] When it is necessary to transform the multiple support rods 7 from the overlapping state to the fan-shaped state, under the control of the hydraulic control system 4, the multiple hydraulic telescopic cylinders 14 will be contracted or extended, so that the push-pull rod 12 can be pulled or pushed to move through the connecting plate 13, thereby driving the moving tooth plate 9 to slide in the limiting slide groove 11. In the process of moving the moving tooth plate 9, the adjusting gear 10 can be driven to rotate on the support shaft 17 under the action of the meshing transmission. Since the rotation direction and rotation angle of each adjusting gear 10 are controlled by different moving tooth plates 9, the control of the hydraulic control system 4 can be realized. Under the use, the rotation direction and rotation angle of each adjusting gear 10 are finally made different, and finally a plurality of foldable support frames 6 and support rods 7 are unfolded in a fan-shaped structure, wherein the gear module needs to be greater than 4 to ensure impact resistance. In addition, the support rod 7 located in the middle can be in a stationary state, and under the action of the meshing cooperation between the moving tooth plate 9 and the adjusting gear 10, the foldable support frame 6 and the support rod 7 can also be positioned. In addition, the unfolding angle of the foldable support frame 6 is optimally 110-160°, and the telescopic stroke of the support rod 7 is greater than 300mm.

[0040] In one embodiment of the present invention, see Figure 1-Figure 14 The hydraulic control system 4 includes a hydraulic pipe 5 and an external joint 16. The number of the hydraulic pipe 5 is multiple, and the two ends of the multiple hydraulic pipes 5 are respectively connected to the foldable support frame 6 and the hydraulic control system 4; wherein, the hydraulic control system 4 can also be provided in the form of a dual-circuit oil supply module, which automatically switches to the backup oil circuit when the pressure loss of the main oil circuit is greater than 15%, so as to avoid the failure of a single hydraulic cylinder during dynamic reconstruction, which may cause support imbalance.

[0041] The hydraulic control system 4 is also connected to the external hydraulic equipment through the external joint 16, and the external hydraulic equipment provides pressure. After the supporting operation is completed, the two can be dismantled for separate transportation. The working state of the hydraulic control system 4 is controlled by multiple pressure sensors arranged on the support rod 7.

[0042] The process of the hydraulic control system 4 performing dynamic reconstruction is as follows: (1) When the pressure sensor detects the pressure value P of a certain supported rod 7 under pressure i ≥0.8P max When the hydraulic control system 4 controls the adjacent support rod 7 to move at a speed v retract =0.2L max / s contraction; (2) The support drive assembly drives the adjacent support rods 7 to rotate toward the compressed support rod 7 at a speed of ω=5° / s, forming a reinforced support area with an angle less than 15°; (3) The hydraulic control system 4 controls the adjacent support rod 7 again to vextend =0.1L max / s stretches, so that the load of the compressed support rod 7 drops to 65%-75% of the original value.

[0043] The contraction displacement of the adjacent support rods 7 is calculated according to the following formula: ; Wherein, ΔL is the shrinkage displacement of the adjacent support rod 7 (mm), k is the empirical coefficient (0.5-0.8), L max is the maximum stroke of the support rod 7 (mm), tanh is the hyperbolic tangent function, P alert is the warning threshold (0.6P max )(MPa),P action is the action threshold (0.8P max )(MPa),P i is the measured pressure of the compressed support rod 7 (MPa).

[0044] When the pressure change rate dP / dt is detected to be greater than 0.1P max / s, the hydraulic control system 4 automatically expands the reconstruction range to more than two adjacent support rods 7. Therefore, according to the size and change rate of the pressure, at least one adjacent support rod 7 can be adjusted to move closer to the compressed support rod 7 to ensure the support effect and enable the system to cope with sudden collapse (response time is less than 3 seconds), which is conducive to further ensuring the safety performance of the operation. In addition, when the adjacent support rods 7 move closer to the compressed support rod 7, the adjacent support rods 7 can also choose to synchronously fine-tune the contraction amount ΔL'=0.3ΔL to form a stress gradient transition zone (experiments have shown that the peak stress can be reduced by 12%), which will not be elaborated here.

[0045] In one embodiment of the present invention, see Figure 1-Figure 14 , each of the support rods 7 is provided with a close support plate 8; The close support plate 8 is also provided with a detection component for monitoring the compression deformation of the foldable support frame 6 and the support rod 7 .

[0046] The detection component comprises: A protective storage groove 18, wherein the protective storage groove 18 is an L-shaped structure, and the two ends of the protective storage groove 18 respectively penetrate the top and the side of the close support plate 8; A lifting block 19, wherein the lifting block 19 is slidably mounted on one end of the protective storage groove 18 and is located on the top of the close support plate 8, and the bottom end of the lifting block 19 is also connected to the inner wall of the protective storage groove 18 through a return spring; A driving inclined block 21, wherein the driving inclined block 21 is slidably mounted in the protective storage groove 18 and is slidably connected to the bottom end of the lifting block 19; A connecting rod 24, one end of which is fixedly connected to the driving inclined block 21, and a sliding plate 22 is fixedly mounted on the connecting rod 24, the sliding plate 22 is slidably connected to the protective storage groove 18, and a storage spring 23 is fixedly mounted on the sliding plate 22; The storage spring 23 is sleeved on the connecting rod 24, and the other end of the storage spring 23 is fixedly connected to the inner wall of the protective storage groove 18; and a detection plug 20, the detection plug 20 is fixedly connected to the other end of the connecting rod 24, and when the lifting block 19 is not under pressure, the detection plug 20 is retracted in the protective storage groove 18 and is located at the side of the support plate 8; Wherein, protective grooves 25 are provided on both sides of the detection plug 20, and an imaging device 26 and a laser detection device 27 are installed in the two protective grooves 25 respectively.

[0047] The contact surface between the support plate 8 and the inner wall of the tunnel is also provided with an elastic buffer layer, whose elastic modulus E=50-100MPa, so as to effectively absorb the vibration energy of the formation (the shock absorption effect is more than 20dB).

[0048] In the process of multiple support rods 7 supporting the inner wall of the tunnel, in order to further monitor the supporting operation of the foldable support frame 6 and the support rod 7 and observe the actual situation of the inner wall of the tunnel (especially the inner wall of the tunnel corresponding to the support rod 7 that is detected to be under excessive pressure), when the close support plate 8 at the top of the support rod 7 contacts the inner wall of the tunnel, under the action of pressure, the lifting block 19 will overcome the elastic effect of the reset spring and move downward in the vertical section of the protective storage groove 18. In the process of the lifting block 19 moving downward, a lateral thrust will be generated on the driving inclined block 21, so that the driving inclined block 21 moves horizontally in the transverse section of the protective storage groove 18, and pushes the detection plug 20 to move to the outside of the protective storage groove 18 through the connecting rod 24, and finally moves the detection plug 20 to the outside of the protective storage groove 18, and enables the image device 26 and the laser detection device 27 to detect the upper and lower ends of the detection plug 20 respectively. In this process, the storage spring 23 is gradually in a compressed state to facilitate the subsequent reset of the detection plug 20. In the non-support operation state In this state, the detection plug 20 is retracted in the protective storage groove 18, and the protective sink 25 is in a relatively sealed space, so as to protect the imaging device 26 and the laser detection device 27, reduce surface dirt, and reduce the frequency of cleaning. When the imaging device 26 and the laser detection device 27 are exposed to the outside of the protective storage groove 18, the imaging device 26 can take pictures of the inner wall of the top tunnel and transmit the image to the terminal device of the staff for observation by the staff, and the laser detection device 27 will detect the curvature of the foldable support frame 6 and the support rod 7 downward. When the foldable support frame 6 and the support rod 7 are bent, it means that they may be under too much pressure (wherein the displacement of the detection plug 20 needs to exceed the threshold time t (t≥2s) to trigger the alarm, so as to avoid the laser detection device 27 from misreporting bending data in a vibration environment). The detection results can also be transmitted to the terminal device of the staff for timely viewing and processing by the staff. No further details will be given here.

[0049] It should be noted that in the present invention, unless otherwise clearly specified and limited, the terms "slide", "rotate", "fix", "have" and the like should be understood in a broad sense, for example, it can be a welding connection, a bolt connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0050] In addition, it should be understood that although this specification is described in terms of embodiments, not every embodiment contains only one independent technical solution. This narrative style of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A shield tunnel anti-deformation emergency support device, comprising a support base (1), characterized in that: It also comprises a folding support portion (2), wherein the folding support portion (2) is located in the middle of the support base (1), and a support driving assembly is also arranged on the folding support portion (2); A plurality of foldable support frames (6) are arranged on the support drive assembly, and a support rod (7) is installed on each of the foldable support frames (6); Wherein, under the driving action of the support driving assembly, in the supporting state, a plurality of support rods (7) are arranged in a fan-shaped structure to support the inner wall of the tunnel, and in the storage state, a plurality of support rods (7) are arranged in a superimposed structure and are located on the support base (1); The support base (1) is also provided with a hydraulic control system (4) for controlling the opening and closing of the support drive assembly and adjusting the support position of the support rod (7), thereby realizing dynamic reconstruction of the tunnel inner wall support.

2. The shield tunnel anti-deformation emergency support equipment according to claim 1 is characterized in that: The support drive assembly comprises: A support shaft (17), the support shaft (17) being fixedly mounted on the folding support portion (2), and a plurality of adjusting gears (10) being rotatably mounted on the support shaft (17), and the folding support frame (6) being fixedly mounted on each of the adjusting gears (10); A limiting slide groove (11), wherein the limiting slide groove (11) is located on the supporting base (1), and the number of the limiting slide grooves (11) is equal to the number of the supporting shafts (17), and the plurality of limiting slide grooves (11) are respectively located directly below the plurality of supporting shafts (17); Wherein, a movable tooth plate (9) is slidably installed in each of the limiting sliding grooves (11), and the movable tooth plate (9) is meshingly connected with the adjusting gear (10); and an angle adjustment unit, wherein the angle adjustment unit is respectively connected to the support base (1) and the movable tooth plate (9), and is connected to the hydraulic control system (4).

3. The shield tunnel anti-deformation emergency support equipment according to claim 2 is characterized in that: The angle adjustment unit comprises: A drive control frame (3), wherein the drive control frame (3) is fixedly mounted on the support base (1), and the hydraulic control system (4) is also arranged on the drive control frame (3); A hydraulic telescopic cylinder (14), wherein the number of the hydraulic telescopic cylinders (14) is plural, the plural hydraulic telescopic cylinders (14) are respectively located directly above the plural limiting slide grooves (11), and the plural hydraulic telescopic cylinders (14) are all fixedly connected to the driving control frame (3); Wherein, each of the hydraulic telescopic cylinders (14) is connected to the hydraulic control system (4) via a second hydraulic pipe (15); and a connecting plate (13), one end of the connecting plate (13) being fixedly connected to the output end of the hydraulic telescopic cylinder (14), and the other end of the connecting plate (13) being fixedly mounted with a push-pull rod (12), and the push-pull rod (12) being fixedly connected to the movable toothed plate (9).

4. The shield tunnel anti-deformation emergency support equipment according to any one of claims 1 to 3, characterized in that: The hydraulic control system (4) comprises a hydraulic pipe (5) and an external joint (16), wherein the number of the hydraulic pipes (5) is multiple, and the two ends of the multiple hydraulic pipes (5) are respectively connected to the foldable support frame (6) and the hydraulic control system (4); Furthermore, the hydraulic control system (4) is also connected to an external hydraulic device via an external joint (16), wherein the working state of the hydraulic control system (4) is controlled by a plurality of pressure sensors arranged on the support rod (7).

5. The shield tunnel anti-deformation emergency support equipment according to claim 4 is characterized in that: The process of the hydraulic control system (4) performing dynamic reconstruction is as follows: (1) When the pressure sensor detects a pressure value P on a certain support rod (7) i ≥0.8P max When the hydraulic control system (4) controls the adjacent support rod (7) to move at a speed v retract =0.2L max / s contraction; (2) The support drive assembly drives the adjacent support rods (7) to rotate toward the compressed support rod (7) at a speed of ω=5° / s, thereby forming a reinforced support area with an angle less than 15°; (3) The hydraulic control system (4) controls the adjacent support rod (7) again to v extend =0.1L max / s stretches, so that the load of the compressed support rod (7) drops to 65%-75% of the original value.

6. The shield tunnel anti-deformation emergency support equipment according to claim 5, characterized in that: The contraction displacement of the adjacent support rods (7) is calculated according to the following formula: ； Where ΔL is the contraction displacement of the adjacent support rods (7), k is the empirical coefficient, and L max is the maximum stroke of the support rod (7), tanh is the hyperbolic tangent function, P alert is the warning threshold, P action is the action threshold, P i is the measured pressure of the compressed support rod (7).

7. The shield tunnel anti-deformation emergency support equipment according to claim 6 is characterized in that: When the pressure change rate is detected to be greater than 0.1P max / s, the hydraulic control system (4) automatically expands the reconstruction range to more than two adjacent support rods (7).

8. The shield tunnel anti-deformation emergency support equipment according to claim 1, characterized in that: Each of the support rods (7) is provided with a close support plate (8); The close support plate (8) is also provided with a detection component for monitoring the compression deformation of the foldable support frame (6) and the support rod (7).

9. The shield tunnel anti-deformation emergency support equipment according to claim 8, characterized in that: The detection component comprises: A protective storage groove (18), the protective storage groove (18) being arranged on the close support plate (8), wherein the protective storage groove (18) is an L-shaped structure, and the two ends of the protective storage groove (18) respectively penetrate the top and the side of the close support plate (8); A lifting block (19), the lifting block (19) is slidably mounted on one end of the protective storage groove (18) and is located on the top of the close support plate (8), and the bottom end of the lifting block (19) is also connected to the inner wall of the protective storage groove (18) through a return spring; A driving inclined block (21), wherein the driving inclined block (21) is slidably mounted in the protective storage groove (18) and is slidably connected to the bottom end of the lifting block (19); A connecting rod (24), one end of the connecting rod (24) is fixedly connected to the driving inclined block (21), and a sliding plate (22) is fixedly mounted on the connecting rod (24), the sliding plate (22) is slidably connected to the protective storage groove (18), and a storage spring (23) is fixedly mounted on the sliding plate (22); Wherein, the storage spring (23) is sleeved on the connecting rod (24), and the other end of the storage spring (23) is fixedly connected to the inner wall of the protective storage groove (18); and a detection plug (20), wherein the detection plug (20) is fixedly connected to the other end of the connecting rod (24), and when the lifting block (19) is not under pressure, the detection plug (20) is retracted in the protective storage groove (18) and is located at the side of the close support plate (8); Wherein, protective sink grooves (25) are provided on both sides of the detection plug (20), and an imaging device (26) and a laser detection device (27) are respectively installed in the two protective sink grooves (25).

10. The shield tunnel anti-deformation emergency support equipment according to claim 9, characterized in that: The contact surface between the close support plate (8) and the inner wall of the tunnel is also provided with an elastic buffer layer, the elastic modulus of which is E=50-100MPa.

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