Assembled sheet steel arch frame and tunnel rapid repair method

Abstract

The present invention provides an assembled sheet steel arch frame and a tunnel rapid repair method, which belongs to the technical field of tunnel maintenance equipment, and includes a plurality of arch pieces, an external support frame and a support member, wherein the plurality of arch pieces can be assembled to form an arch frame structure arranged along the tunnel direction, and each arch piece is a sheet frame structure; the external support frame is a frame structure connected by rods, and is connected to the arch piece and is located outside the arch frame structure, and is used to support the tunnel rock wall; the support members are respectively arranged on the arch piece and the external support frame, and are used to support on the tunnel rock wall. Compared with the arch rib, the arch frame structure formed by the present invention is not only more stable, but also more quickly assembled, so that the collapsed tunnel can be quickly repaired, the traffic capacity can be quickly restored, and a strong support can be formed in a short time to ensure the safe passage of vehicles and personnel.

Description

Technical Field

[0001] The invention belongs to the technical field of tunnel maintenance equipment, and more specifically, relates to an assembled sheet steel arch frame and a tunnel rapid repair method. Background Art

[0002] Under the influence of geological disasters such as earthquakes and landslides, tunnel collapse accidents are prone to occur. Tunnel collapse accidents are more common during tunnel construction, but not common in operating highway and railway lines. However, as more and more tunnels in China are about to reach their design life, the possibility of tunnel collapse has greatly increased, and tunnel collapse will greatly affect the traffic capacity of the corresponding highway and railway lines, and in severe cases will cause regional transportation networks to be paralyzed. At present, there are not many collapse accidents in operating tunnels, so there are not many post-disaster recovery plans, most of which are based on the experience of handling tunnel collapse during construction. However, due to the lack of large-scale construction equipment and limited site on site, the recovery speed of operating tunnels is very slow, which greatly affects regional traffic. Summary of the invention

[0003] The object of the present invention is to provide an assembled sheet steel arch frame and a tunnel rapid repair method to solve the above-mentioned technical problems existing in the prior art.

[0004] To achieve the above-mentioned purpose, the technical solution adopted by the present invention is: to provide an assembled sheet steel arch frame, including a plurality of arch sheets, an external support frame and support members, wherein the plurality of arch sheets can be assembled together to form an arch frame structure arranged along the direction of the tunnel, and each arch sheet is a sheet frame structure; the external support frame is a frame structure connected by rods, and is connected to the arch sheets and is located outside the arch frame structure for supporting the tunnel rock wall; the support members are respectively arranged on the arch sheets and the external support frames for supporting on the tunnel rock wall.

[0005] In one possible implementation, the support member includes a screw rod, a top support portion and a knob portion. The arch plate and the outer support frame are provided with screw holes that cooperate with the screw rod. The top support portion is arranged at the front end of the screw rod to abut against the tunnel rock wall. The knob portion is arranged at the rear end of the screw rod to cooperate with the tool to twist the screw rod.

[0006] In one possible implementation, the external support frame includes multiple connecting rods, multiple support rods and multiple connection nodes, each connecting rod is connected to the arch plate at one end, and the support rod is connected to the other end of several of the connecting rods through the connection node, so as to support the tunnel rock wall. The multiple connecting rods, multiple support rods and multiple connection nodes constitute a stable rigid support structure, and the support members are arranged on the support rods.

[0007] In a possible implementation, the arch piece is a rectangular frame structure formed of I-beams, and the arch pieces adjacent to each other along the tunnel axis are connected by connecting rods.

[0008] In a possible implementation, the arch pieces adjacent to each other along the tunnel cross section are connected by a quick connection assembly, which includes an upper connection flange plate, a lower connection flange plate, a hook rod, a rotating hook and a flange fastening bolt, wherein the upper connection flange plate is arranged on the arch piece that should be located at the upper part; the lower connection flange plate is arranged on the arch piece that should be located at the lower part; the hook rod is arranged on the side of the upper connection flange plate facing the interior of the tunnel; the rotating hook is arranged on the side of the lower connection flange plate facing the interior of the tunnel, and the hook portion faces the interior of the tunnel, and is used to hook on the hook rod when the arch piece that should be located at the upper part and the arch piece that should be located at the lower part are arranged side by side, and the cooperation between the hook rod and the rotating hook is used to enable the arch piece that should be located at the upper part to rotate around the hook rod, and rotate from a state of being arranged side by side with the arch piece that should be located at the lower part to above the arch piece that should be located at the lower part; the flange fastening bolt is used to fasten the upper connection flange plate and the lower connection flange plate together after the arch piece that should be located at the upper part rotates to above the arch piece that should be located at the lower part.

[0009] In one possible implementation, the quick connection assembly also includes a gasket and a connecting plate, the gasket is used to be arranged between the upper connecting flange plate and the lower connecting flange plate to adjust the angle and height difference between the arch plate to be located at the upper part and the arch plate to be located at the lower part; one end of the connecting plate is connected to one of the upper connecting flange plate and the lower connecting flange plate, and the other of the upper connecting flange plate and the lower connecting flange plate is provided with a through hole for the connecting plate to pass through, and the other end of the connecting plate is connected to the corresponding arch plate after passing through the through hole; the connecting plate and the arch plate are connected by connecting plate fastening bolts, and the parts where the connecting plate and the arch plate contact each other are provided with teeth, and the connecting plate is provided with bolt holes for the connecting plate fastening bolts to pass through, and the parts of the arch plate corresponding to the bolt holes are provided with long holes, and the connecting plate fastening bolts, teeth, bolt holes and long holes cooperate with each other to preliminarily fasten the arch plate to be located at the upper part and the arch plate to be located at the lower part while compensating for production errors and gasket height differences.

[0010] In one possible implementation, the gasket is a hard structure, and a plastic layer is provided at the portion of the gasket that is used to contact the upper connecting flange plate and the lower connecting flange plate. The plastic layer is used to be squeezed and deformed by the upper connecting flange plate and the lower connecting flange plate, thereby filling the gap between the upper connecting flange plate and the lower connecting flange plate and the gasket; the gasket is a wedge-shaped or rectangular structure that matches the shape of the upper connecting flange plate and the lower connecting flange plate, and the gasket is provided with through holes for flange fastening bolts and avoidance grooves for avoiding connecting plates.

[0011] In one possible implementation, the assembled sheet steel arch frame also includes a connector, and the outer support frame is connected to the arch sheet via the connector; the arch sheet is provided with a number of mounting positions for installing the connector, so that a suitable position can be selected to install the connector, so that the outer side of the outer support frame can be better supported on the rock wall.

[0012] In a possible implementation, the connecting body includes a main tooth plate, an auxiliary tooth plate and a sliding fastening bolt, the main tooth plate is used to be connected to the outer support frame, and the auxiliary tooth plate is arranged opposite to the main tooth plate and is used to be connected to the arch plate; the main tooth plate and the auxiliary tooth plate are provided with friction teeth that can mesh with each other on the opposite sides, and the main tooth plate and the auxiliary tooth plate are provided with long holes that can be aligned with each other in the middle, one end of the sliding fastening bolt is connected to the auxiliary tooth plate, and the other end passes through the long hole to fix the position of the main tooth plate; wherein, when the sliding fastening bolt does not fasten the main tooth plate and the auxiliary tooth plate, the main tooth plate and the auxiliary tooth plate have the freedom of relative movement, and when the sliding fastening bolt fastens the main tooth plate and the auxiliary tooth plate, the friction teeth between the main tooth plate and the auxiliary tooth plate mesh with each other, thereby limiting the relative movement between the main tooth plate and the auxiliary tooth plate; a pressure sensor is also provided between the main tooth plate and the auxiliary tooth plate to detect the pressure between the main tooth plate and the auxiliary tooth plate.

[0013] To achieve the above object, the technical solution adopted by the present invention is: to provide a method for rapid tunnel repair, using the above-mentioned assembled sheet steel arch frame, comprising the following steps:

[0014] A. Carry out preliminary cleaning of the collapsed part of the tunnel so that the outline of the original tunnel wall can be revealed;

[0015] B. Transport the various components of the assembled sheet steel arch frame to the collapsed part of the tunnel;

[0016] C. Assemble the arch pieces into an arch frame structure along the cross-sectional direction of the tunnel, that is, arrange the bottom arch pieces symmetrically along the axis of the tunnel at the contour of the original tunnel wall, and support them through the support rods; then transport the arch piece that should be located on the upper layer of the bottom arch piece to one side of the bottom arch piece, and hook it with the rotating hook through the hook rod on the quick connection assembly, then flip the upper arch piece upward to make it flip over the bottom arch piece, then select a suitable gasket according to the angle that the arch piece should have and place it between the upper connecting flange plate and the lower connecting flange plate, and continue to flip the upper arch piece until the upper connecting flange The plate and the lower connecting flange plate are both tightly attached to the gasket, and the connecting plate is inserted into the through hole corresponding to the connecting plate. Then, the connecting plate and the arch plate are fastened with the connecting plate fastening bolts to form a preliminary connection and fixation. Then, the upper connecting flange plate, the lower connecting flange plate and the gasket are preliminarily fastened with the flange fastening bolts until the plastic layer is not squeezed and deformed. Then, the arch plate of the upper layer is supported by the support rods. Then, the arch plate of the next layer is installed according to the above steps until the arch plate that should be located at the highest point of the arch is installed. Then, the arch plate that should be located at the highest point of the arch is connected and fixed to form an arch frame structure.

[0017] D. Install the next arch structure at a preset distance along the tunnel axis according to step C above, and connect the adjacent arch structures with connecting rods until the collapsed part of the tunnel is completely covered;

[0018] E. Install the connector and the pressure sensor on the outside of the arch structure, and install the outer support frame from top to bottom, so that the outer end of the mounting frame is against the rock wall of the tunnel. While installing the outer support frame, clean the uncleaned part of the tunnel until the outer support frame completely covers the collapsed part of the tunnel;

[0019] F. Initially place the support member against the rock wall, and successively tighten the flange fastening bolts and the connecting piece fastening bolts on the quick connection assembly, so that the flange fastening bolts squeeze and deform the gasket to a preset state, thereby making the arch structure a stable rigid structure; then remove the bracing rods on the arch piece, and tighten the corresponding support member to a suitable pressure state according to the reading of the pressure sensor and the position of the support member, wherein the suitable pressure state refers to making the reading of the pressure sensor within the range of balanced force of the arch structure;

[0020] G. Hang steel mesh on the arch structure and connecting rods, and perform anti-rust treatment on each connection node.

[0021] The beneficial effect of the assembled sheet steel arch frame provided by the present invention is that: compared with the prior art, since the arch pieces, the outer support frame and the support members are all relatively small components, after the tunnel collapses, they can be easily and quickly transported to the collapsed part by small vehicles or manual labor while being cleaned up, and then the arch pieces are first assembled into one or more arch frame structures that can cover the collapsed part, and then the outer support frame is assembled on the arch frame structure, and the support members are installed at the corresponding parts of the arch pieces and the outer support frame, so that the outer support frame can be tightly pressed against the tunnel rock wall, and no need to install during installation. Large equipment can be installed completely manually, which can greatly reduce the waiting time for the equipment to enter the site. In addition, the external support frame can be set according to the collapsed part, and the cooperation of the external support frame and the support parts can exert a balanced supporting force on the rock wall, and the pressure can be evenly transferred to the arch frame structure. Since the arch piece is a sheet-like frame structure, the arch frame structure formed is not only more stable than the arch rib, but also faster to assemble. Ultimately, the collapsed tunnel can be quickly repaired and the traffic capacity can be quickly restored. In addition, a strong support can be formed in a short time to ensure the safe passage of vehicles and personnel.

[0022] The beneficial effect of the tunnel rapid repair method provided by the present invention is that compared with the prior art, after the tunnel collapses, the present invention can conveniently and quickly transport the various parts of the assembled sheet steel arch frame to the collapsed part by small vehicles or manual labor while cleaning. No large equipment is required during installation, and it can be completely installed manually, which can greatly reduce the waiting time for the equipment to enter the site, and can fully match the shape of the collapsed part, and exert a balanced supporting force on the rock wall through the cooperation of the external support frame and the support member, and evenly transfer the pressure to the arch frame structure. Compared with the arch rib, the constructed arch frame structure is not only more stable, but also faster to assemble, so that the collapsed tunnel can be quickly repaired and the traffic capacity can be quickly restored. In addition, strong support can be formed in a short time to ensure the safe passage of vehicles and personnel. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0024] Figure 1 A schematic structural diagram of an assembled sheet steel arch frame along the cross-section direction of a tunnel provided by an embodiment of the present invention;

[0025] Figure 2 A schematic structural diagram of one side of the assembled sheet steel arch provided by an embodiment of the present invention along the longitudinal direction of the tunnel;

[0026] Figure 3 A schematic structural diagram of an initial state of connection of arch sheets of an assembled sheet-like steel arch frame provided by an embodiment of the present invention;

[0027] Figure 4 A schematic diagram of the structure of the assembled sheet steel arch frame after the arch sheets are connected provided in an embodiment of the present invention.

[0028] Among them, the reference numerals in the figures are as follows:

[0029] 10. Arch piece;

[0030] 20. Quick connection assembly; 21. Upper connection flange plate; 22. Lower connection flange plate; 23. Hook rod;

[0031] 24. Rotating hook; 25. Flange fastening bolts; 26. Connecting piece;

[0032] 27. Connecting piece fastening bolts; 28. Gasket; 29. ​​Teeth;

[0033] 30. Connector; 31. Main tooth plate; 32. Auxiliary tooth plate; 33. Sliding fastening bolt;

[0034] 40. External support frame; 41. Connecting rod; 42. Supporting rod; 43. Connecting node;

[0035] 50. Support member; 60. Pressure sensor; 70. Connecting rod. DETAILED DESCRIPTION

[0036] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0037] The assembled sheet steel arch frame and the tunnel rapid repair method provided by the present invention are now described.

[0038] Please also read Figure 1 and Figure 2 The assembled sheet steel arch frame provided by the first embodiment of the present invention includes a plurality of arch sheets 10, an outer support frame 40 and a support member 50. The plurality of arch sheets 10 can be assembled together to form an arch frame structure arranged along the tunnel direction, and each arch sheet 10 is a sheet frame structure; the outer support frame 40 is a frame structure connected by rods, and is connected to the arch sheet 10 and is located outside the arch frame structure for supporting the tunnel rock wall; the support member 50 is respectively arranged on the arch sheet 10 and the outer support frame 40 for supporting on the tunnel rock wall.

[0039] Compared with the prior art, the assembled sheet steel arch frame provided in this embodiment has a relatively small structure because the arch piece 10, the outer support frame 40 and the support member 50 are all relatively small components. After the tunnel collapses, the arch piece 10 can be easily and quickly transported to the collapsed part by small vehicles or manual labor while cleaning. Then, the arch piece 10 is assembled into one or more arch frame structures that can cover the collapsed part, and then the outer support frame 40 is assembled on the arch frame structure. The support member 50 is installed at the corresponding parts of the arch piece 10 and the outer support frame 40, so that the outer support frame 40 can be tightly pressed against the tunnel rock wall, and no need to install it during installation. Large equipment can be completely installed manually, which can greatly reduce the waiting time for the equipment to enter the site. In addition, the external support frame 40 can be set according to the collapsed part, and the cooperation of the external support frame 40 and the support member 50 can apply a balanced supporting force to the rock wall, and the pressure can be evenly transferred to the arch frame structure. Since the arch sheet 10 is a sheet-like frame structure, the arch frame structure formed is not only more stable than the arch rib, but also faster to assemble. Ultimately, the collapsed tunnel can be quickly repaired and the traffic capacity can be quickly restored. In addition, a strong support can be formed in a short time to ensure the safe passage of vehicles and personnel.

[0040] Please also read Figures 1 to 4 The present invention provides a specific implementation method based on the first implementation method as follows:

[0041] See also Figure 1 and Figure 2 The support member 50 includes a screw rod, a top support portion and a knob portion. The arch piece 10 and the outer support frame 40 are provided with screw holes that cooperate with the screw rod. The top support portion is arranged at the front end of the screw rod to abut against the tunnel rock wall. The knob portion is arranged at the rear end of the screw rod to cooperate with the tool to twist the screw rod.

[0042] After the outer support frame 40 is erected, the screw is twisted by a torque wrench so that the top support part is pressed against the tunnel rock wall at a preset pressure. This can better disperse the pressure on the rock wall to the outer support frame 40 and the arch structure, making the force on each part more uniform and sufficient, reducing the occurrence of local spalling and separation, and improving the structural stability and safety.

[0043] The outer support frame 40 includes a plurality of connecting rods 41, a plurality of support rods 42 and a plurality of connection nodes 43. One end of each connecting rod 41 is connected to the arch plate 10. The support rod 42 is connected to the other end of several of the connecting rods 41 through the connection node 43, and is used to support the tunnel rock wall. The plurality of connecting rods 41, the plurality of support rods 42 and the plurality of connection nodes 43 constitute a stable rigid support structure. The support member 50 is arranged on the support rod 42.

[0044] Since the shape of the collapsed part is difficult to predict after a tunnel collapses, the shape of the outer support frame 40 needs to be determined according to the shape of the collapsed part. Therefore, the length of the connecting rod 41 and the position of the connecting node can be determined according to the actual situation. It can be designed and installed after structural analysis, or it can be determined according to the stress state of the arch structure during installation.

[0045] In order to ensure structural strength and connection speed, the connecting rod 41, the support rod 42 and the connecting node 43 can be connected by a threaded structure or by welding. The connecting node 43 can be an angle-adjustable threaded part or a welding connection part.

[0046] The arch piece 10 is a rectangular frame structure made of I-beams, and the adjacent arch pieces 10 along the tunnel axis are connected by connecting rods 70. The hole in the middle of the rectangular frame structure can reduce weight on the one hand, and can be used for people to pass through or deliver materials on the other hand.

[0047] See also Figure 3 and Figure 4The arch pieces 10 adjacent to each other along the tunnel cross section are connected by a quick connection assembly 20, which includes an upper connection flange plate 21, a lower connection flange plate 22, a hook rod 23, a rotary hook 24 and a flange fastening bolt 25. The upper connection flange plate 21 is arranged on the arch piece 10 that should be located at the upper part; the lower connection flange plate 22 is arranged on the arch piece 10 that should be located at the lower part; the hook rod 23 is arranged on the side of the upper connection flange plate 21 facing the inside of the tunnel; the rotary hook 24 is arranged on the side of the lower connection flange plate 22 facing the inside of the tunnel, and the hook portion faces Inside the tunnel, it is used to hook on the hook rod 23 when the arch piece 10 that should be located at the upper part and the arch piece 10 that should be located at the lower part are arranged side by side. The cooperation between the hook rod 23 and the rotating hook 24 is used to enable the arch piece 10 that should be located at the upper part to rotate around the hook rod 23, and rotate from the state of being arranged side by side with the arch piece 10 that should be located at the lower part to above the arch piece 10 that should be located at the lower part; the flange fastening bolts 25 are used to fasten the upper connecting flange plate 21 and the lower connecting flange plate 22 together after the arch piece 10 that should be located at the upper part rotates to above the arch piece 10 that should be located at the lower part.

[0048] At least one set of hook rods 23 and rotating hooks 24 are arranged on both sides of the sheet-shaped arch piece 10. The rotating hooks 24 are outward-turned hook structures. When the arch piece 10 that should be located at the upper part and the arch piece 10 that should be located at the lower part are arranged side by side, they are hooked on the hook rods 23, providing a single-direction rotation axis for the arch piece 10 that should be located at the upper part to flip, so as to avoid the problem that the sheet-shaped arch piece 10 is difficult to align and difficult to place, and can facilitate the rapid positioning and installation of the flange fastening bolts 25. At the same time, the hook rods 23 and the rotating hooks 24 can also play a certain role in shearing and tensile resistance, and can reduce the possibility of deformation of the arch frame structure.

[0049] The quick connection assembly 20 also includes a gasket 28 and a connecting piece 26. The gasket 28 is used to be placed between the upper connecting flange plate 21 and the lower connecting flange plate 22 to adjust the angle and height difference between the arch piece 10 that should be located at the upper part and the arch piece 10 that should be located at the lower part. One end of the connecting piece 26 is connected to one of the upper connecting flange plate 21 and the lower connecting flange plate 22. The other of the upper connecting flange plate 21 and the lower connecting flange plate 22 is provided with a through hole for the connecting piece 26 to pass through. The other end of the connecting piece 26 passes through the through hole and is connected to the corresponding The connecting piece 26 and the arch piece 10 are connected by the connecting piece fastening bolt 27. The parts where the connecting piece 26 and the arch piece 10 contact each other are provided with teeth 29. The connecting piece 26 is provided with a bolt hole for the connecting piece fastening bolt 27 to pass through. The part of the arch piece 10 corresponding to the bolt hole is provided with a long hole. The connecting piece fastening bolt 27, the teeth 29, the bolt hole and the long hole cooperate with each other to make up for the production error and the height difference of the gasket 28 while preliminarily fastening the arch piece 10 that should be located at the upper part and the arch piece 10 that should be located at the lower part. The teeth 29 on the connecting piece 26 and the arch piece 10 can be strip teeth 29 with vertical long holes.

[0050] On the one hand, the connecting piece 26 can play a certain role in shear resistance and improve the connection strength of the connection. On the other hand, the teeth 29 on the connecting piece 26 can also play a certain limiting role in the opening and closing between the upper connecting flange plate 21 and the lower connecting flange plate 22, which can prevent the connecting piece fastening bolts 27 from sliding along the long hole after fastening, and prevent the flange fastening bolts 25 from loosening.

[0051] The connecting piece 26 can be rotatably connected to the lower connecting flange plate 22 by means of a hinge seat, a ball joint and other structures, so as to adjust the angle of the connecting piece 26 and make it easier to pass the connecting piece 26 through the through hole of the upper connecting flange plate 21 without setting the through hole too large, thereby ensuring the bidirectional shear resistance of the connecting piece 26; and because after the connecting piece 26 is connected by the connecting piece fastening bolt 27, the rotatably connected part will no longer rotate under the limitation of the teeth 29, so the impact on the later stress state is relatively small; in addition, if a hinge seat is adopted, the hinge seat itself can pass through the through hole to further enhance the shear resistance.

[0052] During installation, first select a suitable gasket 28 and install it between the upper connecting flange plate 21 and the lower connecting flange plate 22, then use the connecting plate fastening bolts 27 to preliminarily fasten the connecting plate 26, so that the connecting plate 26 and the teeth 29 on the arch plate 10 are meshed with each other, and then use the flange fastening bolts 25 to preliminarily fasten the upper connecting flange plate 21 and the lower connecting flange plate 22. Since the interaction between the connecting plate 26 and the teeth 29 on the arch plate 10 limits the opening and closing between the upper connecting flange plate 21 and the lower connecting flange plate 22, it can be connected between the outer support frame 40 and the support member 50. When installing other components, prevent the flange fastening bolts 25 from loosening due to mechanical vibration, and avoid the occurrence of dangers such as collapse; after the installation of other main structural components is completed, first tighten the flange fastening bolts 25, and then tighten the connecting piece fastening bolts 27. Due to the force displacement between the teeth 29, the connecting piece 26 can exert additional force on the upper connecting flange plate 21 and the lower connecting flange plate 22, thereby further enhancing the integrity of the connection between the upper connecting flange plate 21 and the lower connecting flange plate 22, and then reducing the possibility of loosening of the flange fastening bolts 25 in the later stage.

[0053] The gasket 28 is a hard structure, and a plastic layer is provided at the portion of the gasket 28 that is used to contact the upper connecting flange plate 21 and the lower connecting flange plate 22. The plastic layer is used to be squeezed and deformed by the upper connecting flange plate 21 and the lower connecting flange plate 22, thereby filling the gap between the upper connecting flange plate 21 and the lower connecting flange plate 22 and the gasket 28; the gasket 28 is a wedge-shaped or rectangular structure that matches the shape of the upper connecting flange plate 21 and the lower connecting flange plate 22, and the gasket 28 is provided with a through hole for the flange fastening bolts 25 and an avoidance groove for avoiding the connecting plate 26.

[0054] The plastic layer can be a soft steel layer or a soft iron layer, which is squeezed and deformed when the bolts are tightened, so as to completely fill the gap between the upper connecting flange plate 21 and the lower connecting flange plate 22, the through hole for the connecting piece 26 to pass through, and the holes on the upper connecting flange plate 21 and the lower connecting flange plate 22 for the flange fastening bolts 25 to pass through, thereby enhancing the structural stability and preventing external water from penetrating between the upper connecting flange plate 21 and the lower connecting flange plate 22, and preventing bolts and other parts from rusting due to the infiltrated water. The thickness of the plastic layer is preferably 0.2mm-0.5mm, and can also be appropriately thickened or thinned according to the production errors of other parts.

[0055] If the part in contact with the plastic layer is treated in advance, the plastic layer, after being squeezed and deformed, acts as an adhesive, which can play a certain bonding role and a certain buffering role, thereby preventing the vibration caused by the passage of vehicles or geological movement from accelerating the loosening of the flange fastening bolts 25.

[0056] Fine grooves may be provided on the outer side of the gasket 28 to facilitate the attachment of the plastic layer and prevent the plastic layer from falling off and air ingress.

[0057] Plastic protrusions are provided on the outside of the plastic layer. On the one hand, they can indicate whether the plastic layer is worn. On the other hand, they can be used to detect the material properties of the plastic layer, especially the corrosion resistance and stress deformation, before installation without destroying the plastic layer itself. For example, pressure equipment can be used to extrude the plastic protrusions to obtain how much force the plastic layer material will deform after being applied at the temperature of installation and use, and even to obtain the required deformation effect, so as to select a gasket 28 of appropriate specifications.

[0058] The assembled sheet steel arch frame also includes a connector 30, and the outer support frame 40 is connected to the arch sheet 10 through the connector 30; the arch sheet 10 is provided with a plurality of installation positions for installing the connector 30, so as to facilitate selecting a suitable position to install the connector 30, so that the outer side of the outer support frame 40 can be better supported on the rock wall.

[0059] The connecting body 30 includes a main tooth plate 31, an auxiliary tooth plate 32 and a sliding fastening bolt 33. The main tooth plate 31 is used to connect with the outer support frame 40, and the auxiliary tooth plate 32 is arranged opposite to the main tooth plate 31 and is used to connect with the arch plate 10; the main tooth plate 31 and the auxiliary tooth plate 32 are provided with friction teeth that can mesh with each other on the opposite side, and the main tooth plate 31 and the auxiliary tooth plate 32 are provided with long holes that can be aligned with each other in the middle. One end of the sliding fastening bolt 33 is connected to the auxiliary tooth plate 32, and the other end passes through the long hole to fix the position of the main tooth plate 31 ; Among them, when the sliding fastening bolts 33 are not fastened to the main tooth plate 31 and the auxiliary tooth plate 32, the main tooth plate 31 and the auxiliary tooth plate 32 have the freedom of relative movement, and when the sliding fastening bolts 33 fasten the main tooth plate 31 and the auxiliary tooth plate 32, the friction teeth between the main tooth plate 31 and the auxiliary tooth plate 32 are engaged with each other, limiting the relative movement between the main tooth plate 31 and the auxiliary tooth plate 32; a pressure sensor 60 is also provided between the main tooth plate 31 and the auxiliary tooth plate 32 to detect the pressure between the main tooth plate 31 and the auxiliary tooth plate 32.

[0060] Please also read Figures 1 to 4 The second embodiment of the present invention provides a rapid tunnel repair method, which uses the above-mentioned assembled sheet steel arch frame and includes the following steps:

[0061] A. Carry out preliminary cleaning of the collapsed part of the tunnel so that the outline of the original tunnel wall can be revealed;

[0062] B. Transport the various components of the assembled sheet steel arch frame to the collapsed part of the tunnel;

[0063] C. The arch pieces 10 are assembled into an arch frame structure along the cross-sectional direction of the tunnel, that is, the bottom arch pieces 10 are symmetrically arranged along the tunnel axis at the contour of the original tunnel wall, and supported by the support rods; then the arch piece 10 that should be located on the upper layer of the bottom arch piece 10 is transported to one side of the bottom arch piece 10, and the hook rod 23 on the quick connection assembly 20 is matched with the rotating hook 24 for hooking, and then the upper layer of the arch piece 10 is flipped upward to make the arch piece 10 flip over the bottom arch piece 10, and then according to the angle that the arch piece 10 should have, a suitable gasket 28 is selected and placed between the upper connecting flange plate 21 and the lower connecting flange plate 22, and the upper layer of the arch piece 10 is continued to be flipped until the upper connecting method The blue plate 21 and the lower connecting flange plate 22 are both tightly attached to the gasket 28, and at the same time, the connecting piece 26 is inserted into the through hole corresponding to the connecting piece 26, and then the connecting piece 26 and the arch piece are fastened by the connecting piece fastening bolts 27 to form a preliminary connection and fixation, and then the upper connecting flange plate 21, the lower connecting flange plate 22 and the gasket 28 are preliminarily fastened by the flange fastening bolts 25 to a state where the plastic layer is not squeezed and deformed, and then the arch piece 10 of the upper layer is supported by the support rods; then continue to install the arch piece 10 of the next upper layer according to the above steps until the arch piece 10 that should be located at the highest point of the arch is installed, and then the arch piece 10 that should be located at the highest point of the arch is connected and fixed to form an arch frame structure.

[0064] D. Install the next arch structure at a preset distance along the tunnel axis according to the above step C, and connect the adjacent arch structures with connecting rods 70 until the collapsed part of the tunnel is completely covered;

[0065] E. Install the connector 30 and the pressure sensor 60 on the outside of the arch structure, and install the outer support frame 40 from top to bottom, so that the outer end of the mounting frame is against the rock wall of the tunnel, and while installing the outer support frame 40, clean the uncleaned part of the tunnel until the outer support frame 40 completely covers the collapsed part of the tunnel;

[0066] F. Initially place the support member 50 against the rock wall, and successively tighten the flange fastening bolts 25 and the connecting piece fastening bolts 27 on the quick connection assembly 20, so that the flange fastening bolts 25 squeeze and deform the gasket 28 to a preset state, thereby making the arch structure a stable rigid structure; then remove the support rods on the arch plate 10, and tighten the corresponding support member 50 to a suitable pressure state according to the reading of the pressure sensor 60 and the position of the support member 50, wherein the suitable pressure state refers to making the reading of the pressure sensor 60 within the range of balanced force of the arch structure;

[0067] G. A steel mesh is hung on the arch structure and the connecting rod 70, and anti-rust treatment is performed at each connection node.

[0068] Compared with the prior art, the rapid tunnel repair method provided in this embodiment can conveniently and quickly transport the various parts of the assembled sheet steel arch frame to the collapsed part by small vehicles or manual labor while cleaning after the tunnel collapses. No large equipment is required for installation, and it can be installed completely manually, which can greatly reduce the waiting time for the equipment to enter the site. It can also fully match the shape of the collapsed part, and exert a balanced supporting force on the rock wall through the cooperation of the external support frame 40 and the support member 50, and transfer the pressure to the arch frame structure in a balanced manner. Compared with the arch rib, the constructed arch frame structure is not only more stable, but also faster to assemble, so that the collapsed tunnel can be quickly repaired and the traffic capacity can be quickly restored. It can also form a strong support in a short time to ensure the safe passage of vehicles and personnel.

[0069] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An assembled sheet steel arch frame, characterized in that: include: A plurality of arch pieces (10) can be assembled together to form an arch frame structure arranged along the tunnel direction, and each of the arch pieces (10) is a sheet-shaped frame structure; The outer support frame (40) is a frame structure formed by connecting rods, is connected to the arch piece (10), and is located outside the arch frame structure, and is used to support the tunnel rock wall; Support members (50) are respectively arranged on the arch piece (10) and the outer support frame (40) and are used for supporting on the rock wall of the tunnel; The adjacent arch pieces (10) along the tunnel cross section are connected via a quick connection assembly (20), and the quick connection assembly (20) comprises: An upper connecting flange plate (21) is provided on the arch piece (10) which should be located at the upper part; A lower connecting flange plate (22) is provided on the arch piece (10) which should be located at the lower part; A hook rod (23) is arranged on a side of the upper connecting flange plate (21) facing the inside of the tunnel; A swivel hook (24) is arranged on a side of the lower connecting flange plate (22) facing the inside of the tunnel, with the hook portion facing the inside of the tunnel, and is used to hook onto a hook rod (23) when the arch piece (10) to be located at the upper part and the arch piece (10) to be located at the lower part are arranged side by side. The hook rod (23) and the swivel hook (24) cooperate to enable the arch piece (10) to be located at the upper part to rotate around the hook rod (23) and rotate from a state of being arranged side by side with the arch piece (10) to being located above the arch piece (10) to be located at the lower part; Flange fastening bolts (25) for fastening the upper connecting flange plate (21) and the lower connecting flange plate (22) together after the arch plate (10) that should be located at the upper part is rotated to above the arch plate (10) that should be located at the lower part; The quick connection assembly (20) further comprises a gasket (28) and a connecting piece (26), wherein the gasket (28) is used to be arranged between the upper connecting flange plate (21) and the lower connecting flange plate (22) to adjust the angle and height difference between the arch piece (10) to be located at the upper part and the arch piece (10) to be located at the lower part; one end of the connecting piece (26) is connected to one of the upper connecting flange plate (21) and the lower connecting flange plate (22), and the other of the upper connecting flange plate (21) and the lower connecting flange plate (22) is provided with a through hole for the connecting piece (26) to pass through, and the other end of the connecting piece (26) passes through the through hole The connecting piece (26) is connected to the corresponding arch piece (10) by a connecting piece fastening bolt (27); the connecting piece (26) and the arch piece (10) are connected at the positions where they contact each other, and the connecting piece (26) is provided with a bolt hole for the connecting piece fastening bolt (27) to pass through; the arch piece (10) is provided with a long hole at the position corresponding to the bolt hole; the connecting piece fastening bolt (27), the teeth, the bolt hole and the long hole cooperate with each other to preliminarily fasten the arch piece (10) to be located at the upper part and the arch piece (10) to be located at the lower part while compensating for the production error and the height difference of the gasket (28).

2. The assembled sheet steel arch frame according to claim 1, characterized in that: The support member (50) comprises a screw rod, a top support portion and a knob portion, the arch piece (10) and the outer support frame (40) are provided with screw holes that cooperate with the screw rod, the top support portion is arranged at the front end of the screw rod and is used to abut against the tunnel rock wall, and the knob portion is arranged at the rear end of the screw rod and is used to cooperate with a tool to twist the screw rod.

3. The assembled sheet steel arch frame according to claim 1, characterized in that: The outer support frame (40) comprises a plurality of connecting rods (41), a plurality of supporting rods (42) and a plurality of connecting nodes (43); one end of each of the connecting rods (41) is connected to the arch piece (10); the supporting rods (42) are connected to the other ends of a plurality of the connecting rods (41) via the connecting nodes (43) and are used to support the rock wall of the tunnel; the plurality of connecting rods (41), the plurality of supporting rods (42) and the plurality of connecting nodes (43) form a stable rigid support structure; and the supporting member (50) is arranged on the supporting rods (42).

4. The assembled sheet steel arch frame according to claim 1, characterized in that: The arch pieces (10) are rectangular frame structures formed of I-beams, and the arch pieces (10) adjacent to each other along the tunnel axis are connected via connecting rods (70).

5. The assembled sheet steel arch frame according to claim 1, characterized in that: The gasket (28) is a hard structure, and a plastic layer is provided at a portion of the gasket (28) that is in contact with the upper connecting flange plate (21) and the lower connecting flange plate (22), and the plastic layer is used to be squeezed and deformed by the upper connecting flange plate (21) and the lower connecting flange plate (22), thereby filling the gap between the upper connecting flange plate (21), the lower connecting flange plate (22) and the gasket (28); the gasket (28) is a wedge-shaped or rectangular parallelepiped structure that matches the shape of the upper connecting flange plate (21) and the lower connecting flange plate (22), and the gasket (28) is provided with a through hole for a flange fastening bolt (25) and an avoidance groove for avoiding the connecting plate (26).

6. The assembled sheet steel arch frame according to claim 5, characterized in that: The assembled sheet steel arch frame also includes a connector (30), and the outer support frame (40) is connected to the arch sheet (10) via the connector (30); the arch sheet (10) is provided with a plurality of mounting positions for mounting the connector (30), so that a suitable position can be selected to mount the connector (30), so that the outer side of the outer support frame (40) can be better supported on the rock wall.

7. The assembled sheet steel arch frame according to claim 6, characterized in that: The connecting body (30) comprises a main tooth plate (31), an auxiliary tooth plate (32) and a sliding fastening bolt (33); the main tooth plate (31) is used to be connected to an outer support frame (40); the auxiliary tooth plate (32) is arranged opposite to the main tooth plate (31) and is used to be connected to the arch plate (10); the main tooth plate (31) and the auxiliary tooth plate (32) are provided with friction teeth that can mesh with each other on opposite sides; the main tooth plate (31) and the auxiliary tooth plate (32) are provided with long holes that can be aligned with each other in the middle; one end of the sliding fastening bolt (33) is connected to the auxiliary tooth plate (32), and the other end passes through the long hole to fix the position of the main tooth plate (31); wherein the When the sliding fastening bolts (33) do not fasten the main tooth plate (31) and the auxiliary tooth plate (32), the main tooth plate (31) and the auxiliary tooth plate (32) have a degree of freedom of relative movement, and when the sliding fastening bolts (33) fasten the main tooth plate (31) and the auxiliary tooth plate (32), friction teeth between the main tooth plate (31) and the auxiliary tooth plate (32) mesh with each other, thereby limiting the relative movement between the main tooth plate (31) and the auxiliary tooth plate (32); a pressure sensor (60) is also provided between the main tooth plate (31) and the auxiliary tooth plate (32) to detect the pressure between the main tooth plate (31) and the auxiliary tooth plate (32).

8. A method for rapid tunnel repair, characterized in that: The fabricated sheet steel arch frame according to claim 7 comprises the following steps: A. Carry out preliminary cleaning of the collapsed part of the tunnel so that the outline of the original tunnel wall can be revealed; B. Transport the various components of the assembled sheet steel arch frame to the collapsed part of the tunnel; C. The arch pieces (10) are assembled into an arch frame structure along the cross-sectional direction of the tunnel, that is, the bottom arch pieces (10) are symmetrically arranged along the tunnel axis at the contour of the original tunnel wall and supported by the support rods; then, the arch piece (10) that should be located on the upper layer of the bottom arch piece (10) is transported to one side of the bottom arch piece (10), and is hooked with the rotating hook (24) through the hook rod (23) on the quick connection component (20), and then the upper layer of the arch piece (10) is flipped upward to make the arch piece (10) flip over the bottom arch piece (10), and then a suitable gasket (28) is selected according to the angle that the arch piece (10) should have and is placed between the upper connecting flange plate (21) and the lower connecting flange plate (22), and the upper layer of the arch piece (10) is continued to be flipped until the upper connecting method The blue plate (21) and the lower connecting flange plate (22) are both tightly attached to the gasket (28), and the connecting plate (26) is inserted into the through hole corresponding to the connecting plate (26). Then, the connecting plate fastening bolts (27) are used to fasten the connecting plate (26) and the arch plate to form a preliminary connection and fixation. Then, the upper connecting flange plate (21), the lower connecting flange plate (22) and the gasket (28) are preliminarily fastened to a state where the plastic layer is not squeezed and deformed by the flange fastening bolts (25). Then, the arch plate (10) of the upper layer is supported by the support rods. Then, the arch plate (10) of the upper layer is installed according to the above steps until the arch plate (10) that should be located at the highest point of the arch is installed. Then, the arch plate (10) that should be located at the highest point of the arch is closed and fixed to form an arch frame structure. D. Install the next arch structure at a preset distance along the tunnel axis according to the above step C, and connect the adjacent arch structures with connecting rods (70) until the collapsed part of the tunnel is completely covered; E. Installing the connector (30) and the pressure sensor (60) on the outside of the arch structure, and installing the outer support frame (40) from top to bottom, so that the outer end of the mounting frame is against the rock wall of the tunnel, and while installing the outer support frame (40), cleaning the uncleaned part of the tunnel, until the outer support frame (40) completely covers the collapsed part of the tunnel; F. Initially contact the support member (50) against the rock wall, and successively tighten the flange fastening bolts (25) and the connecting plate fastening bolts (27) on the quick connection assembly (20), so that the flange fastening bolts (25) squeeze and deform the gasket (28) to a preset state, thereby making the arch structure a stable rigid structure; then remove the support rods on the arch plate (10), and tighten the corresponding support member (50) to a suitable pressure state according to the reading of the pressure sensor (60) and the position of the support member (50), wherein the suitable pressure state refers to making the reading of the pressure sensor (60) within the range of balanced force of the arch structure; G. Steel mesh is hung on the arch structure and the connecting rod (70), and anti-rust treatment is performed at each connection node.

Images