A bonding connection structure of a prefabricated component in a tunnel lining reinforcement structure

Abstract

The present application belongs to the field of tunnel and underground engineering, and discloses a bonding connection structure of a prefabricated component in a tunnel lining reinforcing structure to solve the technical problems existing in the prior art tunnel lining reinforcing, the connection structure comprising a first connecting device arranged between two adjacent prefabricated components, the first connecting device comprising a plate-shaped component prefabricated at the end of the prefabricated component along the tunnel circumferential direction or the circumferential and longitudinal directions and a pre-embedded part embedded in the prefabricated component, and the pre-embedded part is connected with the plate-shaped component, the two adjacent prefabricated components are bonded through the plate-shaped component, and the plate-shaped component on the prefabricated component at the beginning and end of the tunnel circumferential direction is bonded with the tunnel lining through a second connecting device or a third connecting device or both the second connecting device and the third connecting device. The present application adopts bonding connection, the stress is clear, the processing is easy, the tunnel lining reinforcing period is greatly shortened, and the connection problems between the adjacent prefabricated components and between the prefabricated component and the tunnel lining are well solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of tunnels and underground engineering, and particularly relates to a bonding type connecting structure of a prefabricated component in a tunnel lining reinforcing structure. BACKGROUND

[0002] At present, the tunnel lining reinforcing method mostly adopts the embedding or erecting steel arch method. The embedding steel arch reinforcing method has great damage to the existing lining and has certain construction risks. The connecting construction of the steel arch is difficult and has poor quality. The erecting steel arch reinforcing method has large reinforcing thickness and easily invades the tunnel building limit, which affects the driving safety. The steel arch is visible to the naked eye, and the driving safety and experience are poor. The use of prefabricated components for reinforcement can solve the above problems, but how to connect the prefabricated components is a problem to be solved. SUMMARY

[0003] The present application aims to solve the problems in the existing tunnel lining reinforcing technology, and provides a bonding type connecting structure of a prefabricated component in a tunnel lining reinforcing structure, which is simple in structure and can be quickly constructed.

[0004] In order to achieve the above purpose, the technical scheme adopted by the present application is as follows:

[0005] A bonding type connecting structure of a prefabricated component in a tunnel lining reinforcing structure, comprising a first connecting device arranged between two adjacent prefabricated components, the first connecting device comprising a plate type component prefabricated at the end head of the prefabricated component along the tunnel circumferential direction or the circumferential and longitudinal directions, and a pre-embedded part embedded in the prefabricated component, and the pre-embedded part is connected with the plate type component, the two adjacent prefabricated components are bonded through the plate type component, and the plate type component on the prefabricated component at the beginning and end of the tunnel circumferential direction is bonded with the tunnel lining through a second connecting device or a third connecting device or both.

[0006] Further, the second connecting device comprises a U-shaped component, the U-shaped component is connected with the inner side of the tunnel lining through a second connecting piece, one side of the U-shaped component is bonded with the plate type component, and the other side of the U-shaped component is connected with the inner wall of the existing cable groove through a third connecting piece.

[0007] Further, a plurality of first stiffening ribs are arranged in the inner side of the groove of the U-shaped component.

[0008] Further, the third connecting device comprises an L-shaped component, one side of the L-shaped component close to the existing lining is connected through a third connecting piece, and the other side of the L-shaped component close to the prefabricated component is bonded with the plate type component.

[0009] Further, a plurality of second stiffening ribs are arranged at the inner side of the right angle of the L-shaped component.

[0010] Further, the pre-embedded part is a pre-embedded nail or pre-embedded rod spacedly welded on the plate-shaped component, and the pre-embedded rod is T-shaped or L-shaped.

[0011] Further, the pre-embedded part is welded with the plate-shaped component into a C shape.

[0012] Further, a plurality of holes are spacedly arranged on the pre-embedded part.

[0013] Further, the pre-embedded part is a pre-embedded plate welded on both sides of the plate-shaped component or spacedly welded on the plate-shaped component, and a shear rod is arranged through the pre-embedded plate.

[0014] Compared with the prior art, the present application has the following beneficial effects:

[0015] The present application pre-embeds the plate-shaped component at the end of the prefabricated component, bonds the adjacent prefabricated components through the plate-shaped component, bonds the prefabricated component near the existing cable groove through the plate-shaped component and one side of the U-shaped component, and connects and fixes the U-shaped component with the inner side wall of the existing cable groove and the inner side of the lining through the connecting piece.

[0016] When locally reinforcing, the prefabricated component is bonded with the existing lining through the plate-shaped component and the L-shaped component at the beginning and end of the tunnel, and the L-shaped component is fixed with the lining through the connecting piece.

[0017] The pre-embedded part welded and fixed with the plate-shaped component and pre-embedded in the prefabricated component can be a pre-embedded nail or pre-embedded rod, a C shape or a hole plate, and a shear rod is arranged through the hole plate, which aims to increase the tensile strength.

[0018] The present application adopts bonding connection, has clear stress, is easy to process, greatly shortens the tunnel lining reinforcement period, and well solves the connection problems between the adjacent prefabricated components and between the prefabricated component and the tunnel lining. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of the present application.

[0020] Figure 2 It is Figure 1 It is a local enlarged schematic diagram of position A in the middle.

[0021] Figure 3 It is Figure 1 It is a local enlarged schematic diagram of position B.

[0022] Figure 4 It is a structure three-view diagram of the first connecting device of the present application in the form of welding nails.

[0023] Figure 5 It is a structure three-view diagram of the first connecting device of the present application in the form of direct welding.

[0024] Figure 6The first connecting device of the present application adopts T-shaped component form, L-shaped component form and T-shaped and L-shaped component mixed form structure three views.

[0025] Figure 7 The first connecting device of the present application adopts non-hole or hole continuous or discontinuous I-shaped component form structure three views.

[0026] Figure 8 The first connecting device of the present application adopts non-hole or hole continuous or discontinuous C-shaped component form structure three views.

[0027] Figure 9 The first connecting device of the present application adopts continuous and discontinuous T-shaped component form or U-shaped component form structure three views containing shear rod.

[0028] Figure 10 The first connecting device of the present application adopts shear rod and several hole plate combined component form structure three views.

[0029] Figure 11 The second connecting device of the present application adopts structure three views.

[0030] Figure 12 The layout schematic diagram of the reinforcing net, the reserved hole and the embedded part of the present application.

[0031] Figure 13 is a structural schematic diagram of the present application applied to railway tunnel lining reinforcement.

[0032] Figure 14 is a structural schematic diagram of the present application applied to shield tunnel lining reinforcement.

[0033] Figure 15 is a structural schematic diagram of the present application locally reinforcing highway tunnel lining.

[0034] Figure 16 is Figure 15 The local enlarged schematic diagram at the middle C.

[0035] Figure 17 The third connecting device of the present application adopts structure three views.

[0036] Figure 18 The structural schematic diagram of the present application locally reinforcing railway tunnel lining.

[0037] Figure 19 The structural schematic diagram of the present application locally reinforcing shield tunnel lining.

[0038] The meanings of the reference numerals in the attached drawings are as follows: 1. Precast component; 2. First connector; 21. First connecting rod; 22. First nut; 23. First tray; 3. Reinforcing mesh; 4. First connecting device; 41. Plate-shaped component; 42. Embedded part; 43. Shear bar; 5. First adhesive layer; 6. Second adhesive layer; 7. Grout filling layer; 8. Second connector; 81. Second connecting rod; 82. Second nut; 83. Second tray; 9. Third connector; 91. Third connecting rod; 92. Third nut; 10. Second connecting device; 101. U-shaped component; 102. First stiffening rib; 11. Third connecting device; 111. L-shaped component; 112. Second stiffening rib. Detailed Implementation

[0039] Example 1: Full-section reinforcement of tunnel lining.

[0040] like Figures 1-3 As shown, an adhesive connection structure for prefabricated components in a tunnel lining reinforcement structure includes a first connecting device 4 disposed between two adjacent prefabricated components 1. The first connecting device 4 includes a plate-shaped component 41 prefabricated at the circumferential or circumferential and longitudinal ends of the prefabricated component 1 along the tunnel and an embedded part 42 pre-embedded at the end of the prefabricated component 1, and the embedded part 42 is connected to the plate-shaped component 41. The two adjacent prefabricated components 1 are connected by bonding the plate-shaped components 41 on both sides through a first adhesive layer 5. (e.g.) Figure 2 The precast component 1 near the tunnel wall foot has its plate-shaped component 41 bonded to the second connecting device 10. The second connecting device 10 is bonded to the tunnel lining via a second adhesive layer 6 and a second connecting piece 8. A reinforcing mesh 3 can be pre-embedded within the precast component 1. Grouting holes and mounting holes for the first connecting piece 2 are pre-drilled on the precast component 1. A grouting material filling layer 7 is provided between the precast component 1 and the tunnel lining.

[0041] The first connecting member 2 may consist of a first connecting rod 21, a first tray 23, and a first nut 22. The first connecting member 2 may be an anchor bolt, a rebar, or other connecting member. The second connecting member 8 may consist of a second connecting rod 81, a second tray 83, and a second nut 82. The second connecting rod 81 may be made of metal or non-metal materials. The second connecting member 8 may be an anchor bolt, a rebar, or other connecting member. The third connecting member 9 may be an anchor bolt or a rebar. The third connecting member 9 may consist of a third connecting rod 91 and a third nut 92.

[0042] The first adhesive layer 5 and the second adhesive layer 6 can be made of inorganic or organic adhesives. The grout filling layer 7 can be made of inorganic or organic grout.

[0043] like Figure 2As shown, the end of the precast component 1 near the base of the tunnel lining wall is bonded to the second connecting device 10 via the plate-shaped component 41 of the first connecting device 4. The second connecting device 10 is bonded to the tunnel lining. The second connecting device 10 includes a U-shaped component 101, which is connected to the inner side of the tunnel lining via a second connector 8. One side of the U-shaped component 101 is bonded to the plate-shaped component 41, and the other side of the U-shaped component 101 is connected to the inner wall of the existing cable trough via a third connector 9. Multiple first stiffening ribs 102 (such as...) are spaced apart on the inner side of the groove of the U-shaped component 101. Figure 11 ).

[0044] like Figure 4 As shown, the embedded part 42 of the first connecting device 4 is a pre-embedded welding stud that is welded at intervals on the plate-shaped component 41. The pre-embedded welding stud 42 can be arranged in one or more rows, or staggered. The welding stud 42 can also be replaced with other types of pre-embedded parts that enhance the connection strength between the plate-shaped component 41 and the precast component 1.

[0045] like Figure 5 As shown, the first connecting device 4 can also be composed of plate-shaped components 41, and the reinforcing mesh 3 is made of welded steel mesh. The plate-shaped components 41 are directly welded to the welded steel mesh.

[0046] like Figure 6 As shown, the embedded part 42 can also be a T-shaped, L-shaped, or hybrid structure.

[0047] The embedded part 42 can also be an embedded part of other types such as hook type 9, bend type, umbrella handle type, fold hook type 7, single ball type, multi ball type, thread type, twist type, claw type, end weld plate type, tail nut type, tail enlarged type, U type, etc., to enhance the connection strength between the reinforcing plate type component 41 and the precast component 1.

[0048] like Figure 7 As shown, the embedded part 42 and the plate-shaped component 41 form an I-shaped component. The I-shaped component consists of a web and two flanges of unequal width. The narrower flange is embedded in the precast component 1. The web can also be perforated. The web and the narrower flange can also be arranged discontinuously.

[0049] like Figure 8 As shown, the embedded part 42 and the plate-shaped component 41 form a C-shaped component. The C-shaped component consists of a middle plate and side plates with folded (rolled) edges on both sides. Holes can also be made in the side plates on both sides, and the side plates on both sides can also be arranged discontinuously.

[0050] like Figure 9 As shown in (a) and 9(b), the embedded part 42 and the plate-shaped component 41 form a T-shaped component. The T-shaped component consists of a web and a flange plate. The web has holes spaced apart and shear bars 42 are inserted and embedded at the end of the precast component 1. The web can also be arranged discontinuously.

[0051] As Figure 9 (c), 9 (d) shown, the first connecting device 4 is composed of U-shaped member and shear bar 43, U-shaped member is composed of middle plate and two side plates, two side plates are spaced apart hole and inserted into the shear bar 43 after pre-buried in the end of the prefabricated component 1, two side plates can also be discontinuous arrangement.

[0052] As Figure 10 shown, the first connecting device 4 is composed of plate type component 41, several open hole plate 42, shear bar 43 through all open hole plate and nut 44, open hole plate 42, shear bar 43 and nut 44 are composed of combined connecting piece pre-buried in the end of the prefabricated component 1, shear bar 43 can be arranged multiple.

[0053] As Figure 12 shown, the prefabricated component 1 can be provided with reinforcing net 3, reinforcing net 3 can be made of metal material, such as steel bar welded mesh, steel wire mesh, etc., also can be made of non-metallic material, such as geogrid, fiber mesh, etc. The prefabricated component 1 and tunnel lining are connected by the first connecting piece 2 distributed on the prefabricated component 1 according to certain interval. The arrangement mode of the first connecting piece 2 on the prefabricated component 1 can adopt plum blossom shape, rectangle, one character shape, etc. The annular and longitudinal spacing between the first connecting piece 2 should be adjusted according to the actual situation. When producing the prefabricated component 1, the hole, grouting hole and mounting hole for installing the first connecting piece 2 should be reserved.

[0054] Specific implementation:

[0055] First, the prefabricated component 1, the first connecting device 4 and the second connecting device 10 are produced in the factory, and in this embodiment, the prefabricated component 1 is preferably prefabricated by using ultra high performance concrete (UHPC). The prefabricated component 1 can also be prefabricated by using ordinary concrete, high-strength concrete, ultra high-strength concrete, high ductility concrete, resin, asphalt, rubber and other cementitious materials, and the prefabricated component 1 can also be prefabricated by using metal, non-metal and other materials. The first connecting device 4 and the second connecting device 10 can be made of metal or non-metal material. The hole and grouting hole for installing the first connecting piece 2 are reserved on the prefabricated component 1 along the annular and longitudinal direction of the tunnel. If the existing structure is a reinforced concrete structure, the distribution of steel bars should be detected in advance by using a steel bar detector, and the hole position can be moved appropriately to avoid the steel bars. When the prefabricated component 1 is produced, the reinforcing net 3 can be provided, and the first connecting device 4 is pre-buried in the end along the annular or annular and longitudinal direction of the tunnel.

[0056] Secondly, the base surface of the tunnel to be reinforced section is treated, and when the prefabricated component 1 is installed, the structure surface should be dry and clean.

[0057] Then, the installation position of the prefabricated component 1 and the position corresponding to the hole position of the first connecting member 2 and the second connecting member 8 are marked on the existing lining structure, and drilling and hole cleaning are performed. Then, the side wall foot is processed, and the third connecting member 9 is installed.

[0058] Then, the second connecting device 10 is glued and pasted at the position of the second adhesive layer 6, and then the second connecting device 10 is pressed and fixed by installing the second connecting member 8, so that the second adhesive layer 6 is solidified.

[0059] Then, glue is applied to the surface of the first connecting device 4 at the end of the prefabricated component 1, and the prefabricated component 1 is moved to the predetermined position by means of a splicing machine, manpower or other mechanical equipment, and then fixed in the inside of the tunnel lining by the first connecting member 2.

[0060] Finally, the gap between the two ends of the prefabricated component 1 along the tunnel direction and the tunnel lining is sealed by using edge sealing glue, and the grouting hole and the air outlet hole are reserved, and then the grouting material is pressed and injected from the reserved grouting hole in the order from bottom to top, until the gap between the prefabricated component 1 and the existing lining is filled and compacted by the grouting material.

[0061] In order to improve the waterproof performance of the reinforced structure, a water stop strip or other waterproof measure can be arranged at the joint between the longitudinally adjacent prefabricated components 1, and a waterproof gasket can be arranged between the nut of the first connecting member 2, the second connecting member 8 and the third connecting member 9 and the component.

[0062] The technical solution provided by the present application is suitable for reinforcing the lining of a highway tunnel, and is also suitable for reinforcing the lining of a railway tunnel (such as Figure 13 ), and is also suitable for reinforcing the lining of a shield tunnel (such as Figure 14 ).

[0063] Embodiment 2: Local reinforcement of tunnel lining.

[0064] As shown in Figures 15-16 , when the tunnel lining is locally reinforced, the end of the prefabricated component 1 at the starting and ending positions in the circumferential reinforcement range is fixed by the third connecting device 11. The third connecting device 11 is connected to the inside of the tunnel lining by the second connecting member 8, and the third connecting device 11 is adhesively connected to the first connecting device 4 at the end of the prefabricated component 1.

[0065] As shown in Figure 17 , the third connecting device 11 includes an L-shaped component 111 and a second stiffening rib 112. The L-shaped component 111 has a mounting hole for mounting the third connecting member 9 on the side close to the existing lining, and a plurality of second stiffening ribs 112 are arranged at intervals on the inside of the right angle of the L-shaped component 111.

[0066] The technical solution provided by the present application is suitable for locally reinforcing the lining of a highway tunnel, and is also suitable for locally reinforcing the lining of a railway tunnel (such as Figure 18), and is also applicable to partial reinforcement of shield tunnel lining (such as Figure 19 ).

[0067] Those skilled in the art can make appropriate modifications to the above embodiments according to the disclosure of the specification. Therefore, the present application is not limited to the specific embodiments disclosed and described above. Any modifications or equivalent replacements made within the principles of the present application shall fall within the protection scope of the present application.

Claims

1. A structure for adhesively connecting prefabricated elements in a tunnel lining reinforcement structure, characterized in that: The first connecting device (4) is arranged between two adjacent prefabricated components (1), and comprises a plate-shaped component (41) prefabricated along the circumferential or circumferential and longitudinal end of the prefabricated component (1) and a pre-embedded part (42) embedded in the prefabricated component (1), and the pre-embedded part (42) is connected with the plate-shaped component (41), the two adjacent prefabricated components (1) are bonded through the plate-shaped component (41), and the plate-shaped component (41) on the prefabricated component (1) at the circumferential end of the tunnel is bonded with the tunnel lining through the second connecting device (10) and the third connecting device (11); The second connecting device (10) comprises a U-shaped component (101), the U-shaped component (101) is connected with the inner side of the tunnel lining through a second connecting piece (8), one side of the U-shaped component (101) is bonded with the plate-shaped component (41), and the other side of the U-shaped component (101) is connected with the inner wall of the existing cable groove through a third connecting piece (9); The third connecting device (11) comprises an L-shaped component (111), the side of the L-shaped component (111) close to the existing lining is connected through the third connecting piece (9), and the side of the L-shaped component (111) close to the prefabricated component (1) is bonded with the plate-shaped component (41).

2. The adhesive connection structure of the prefabricated components of the tunnel lining reinforcement structure according to claim 1, characterized in that: A plurality of first stiffening ribs (102) are arranged in the groove of the U-shaped component (101).

3. The adhesive joint structure of the prefabricated component of the tunnel lining reinforcement structure according to claim 1, characterized in that: A plurality of second stiffening ribs (112) are arranged at the inner side of the right angle of the L-shaped component (111).

4. The adhesive connection structure of the prefabricated components of the tunnel lining reinforcement structure according to any one of claims 1 to 3, characterized in that: The pre-embedded part (42) is a pre-embedded nail or a pre-embedded rod member welded on the plate-shaped component (41), and the pre-embedded rod member is T-shaped or L-shaped.

5. The adhesive connection structure of the prefabricated components of the tunnel lining reinforcement structure according to any one of claims 1-3, characterized in that: The pre-embedded part (42) and the plate-shaped component (41) are welded into a C-shaped structure.

6. A bonding joint structure of a precast member in a tunnel lining reinforcement structure according to claim 5, characterized in that: A plurality of holes are arranged on the pre-embedded part (42).

7. The adhesive connection structure of the prefabricated components of the tunnel lining reinforcement structure according to claims 1-3, characterized in that: The pre-embedded part (42) is a pre-embedded plate welded on both sides of the plate-shaped component (41) or spacedly welded on the plate-shaped component (41), and a shear rod (43) is arranged on the pre-embedded plate.

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