Lining structure of water delivery tunnel

Abstract

The utility model relates to the technical field of water delivery tunnel construction, and provides a water delivery tunnel lining structure which comprises a concrete surface layer, an arch-shaped frame, a transverse frame and a stress plate, and the concrete surface layer covers the inner wall of a tunnel; the multiple arch frames are arranged in the length direction of the tunnel at intervals, and the arch frames are embedded in the concrete surface layer. The multiple transverse frames are arranged in the length direction of the tunnel in an extending mode, the multiple transverse frames are arranged at intervals in the direction perpendicular to the axis of the transverse frames, and the multiple transverse frames are all connected to the arch-shaped frame. The multiple stress plates are arranged, the multiple stress plates are detachably connected to the arch-shaped frame, and the stress plates are attached to the inner wall of the concrete surface layer. The method has the effect of reducing the cracking risk of the concrete lining.

Description

Technical Field

[0001] This application relates to the field of water conveyance tunnel construction technology, and in particular to a water conveyance tunnel lining structure. Background Technology

[0002] Water conveyance tunnels are commonly used in hydraulic engineering structures to reduce bends, shorten flow paths, and minimize head loss. They are primarily used for water diversion, conveyance, and flood discharge. During construction, water conveyance tunnels typically require lining to ensure the correct tunnel cross-sectional shape. This lining also protects the surrounding rock walls, preventing seepage or enhancing water conveyance capacity.

[0003] Water conveyance tunnels are typically liningd using sprayed concrete. However, during the water conveyance process, the concrete lining is at risk of cracking due to the pressure of the water flow. Utility Model Content

[0004] To reduce the risk of cracking in concrete lining, this application provides a lining structure for a water conveyance tunnel.

[0005] The technical solution for a water conveyance tunnel lining structure provided in this application is as follows:

[0006] A water conveyance tunnel lining structure includes a concrete surface layer, arched frames, crossbeams, and load-bearing plates. The concrete surface layer covers the inner wall of the tunnel. Multiple arched frames are arranged at intervals along the length of the tunnel and embedded in the concrete surface layer. Multiple crossbeams extend along the length of the tunnel and are arranged at intervals perpendicular to their own axes. Each crossbeam is connected to one of the arched frames. Multiple load-bearing plates are detachably connected to the arched frames and adhere to the inner wall of the concrete surface layer.

[0007] By adopting the above technical solution, during the lining construction, multiple arched frames are first installed in the tunnel; then, cross frames are passed through the space between the arched frames and the inner wall of the tunnel, and the position of the cross frames is adjusted until they are erected on the support rods; then, concrete is sprayed, and after the concrete solidifies to form a concrete surface layer, the load-bearing plate is connected to the arched frames. In this way, the arched frames and cross frames are used to strengthen the structural strength of the concrete surface layer inside the concrete surface layer, and the load-bearing plate is used to share some of the water pressure, thereby reducing the risk of cracking of the concrete surface layer under water pressure.

[0008] Optionally, the crossbeam and the arched frame are detachably connected.

[0009] By adopting the above technical solutions, it is convenient to produce, process, transport and store the horizontal and arched frames.

[0010] Optionally, the surface of the arched frame near the inner wall of the tunnel is provided with a plurality of support rods, which are arranged at intervals along the length of the arched frame; all the support rods are inclined upwards, and a support space is formed between the support rods and the arched frame for the crossbeam to pass through.

[0011] By adopting the above technical solution, when installing the crossbeam, first insert the crossbeam into the gap between the arch frame and the inner wall of the tunnel, and then adjust the position of the crossbeam until it is mounted on the support rod, thereby realizing the detachable connection between the crossbeam and the arch frame. The structure is simple and easy to construct.

[0012] Optionally, the arched frame is provided with steel wires for binding the crossbeams to the arched frame.

[0013] By adopting the above technical solution, after adjusting the crossbeam to the support rod, the crossbeam is tied to the arch frame with steel wire to enhance the connection stability between the crossbeam and the arch frame.

[0014] Optionally, the arched frame is provided with a connecting rod, and the end face of the connecting rod away from the arched frame is provided with a threaded cavity. The force-bearing plate is provided with a threaded rod, and the threaded rod is threadedly engaged with the threaded cavity.

[0015] By adopting the above technical solution, when installing the load-bearing plate, the threaded rod can be screwed into the threaded cavity to achieve a detachable connection between the load-bearing plate and the arch frame. The structure is simple and easy to operate.

[0016] Optionally, the end of the connecting rod is threadedly connected to a sealing element through the threaded cavity, and the sealing element is used to open and close the port of the threaded cavity.

[0017] By adopting the above technical solution, when spraying concrete, the port of the threaded cavity is sealed with a sealing component to prevent concrete from entering the threaded cavity, thus eliminating the need to clean the threaded cavity separately after spraying concrete and further improving the convenience of construction.

[0018] Optionally, the surface of the force-bearing plate is provided with a through hole for the threaded rod to pass through; the end of the threaded rod is provided with an abutment for abutting against the surface of the force-bearing plate opposite to the connecting rod.

[0019] By adopting the above technical solution, when installing the load-bearing plate, the threaded rod is passed through the through hole, and then the threaded rod is screwed into the threaded cavity. The distance between the load-bearing plate and the concrete surface layer is adjusted by turning the abutment. During the adjustment process, only the abutment needs to be turned, without turning the load-bearing plate, which further improves the convenience of construction.

[0020] Optionally, the load-bearing plate has multiple bending grooves, which extend along the length of the crossbeam. The two ends of the bending grooves penetrate the two end faces of the load-bearing plate, and the multiple bending grooves are arranged at intervals in a direction perpendicular to their own axis.

[0021] By adopting the above technical solution, it is easy to adjust the curvature of the load-bearing plate according to the curvature of the tunnel, so that the load-bearing plate can fit more closely to the inner wall of the tunnel and ensure the protective effect of the load-bearing plate on the concrete surface layer.

[0022] In summary, this application includes at least one of the following beneficial technical effects:

[0023] 1. By setting horizontal and arched frames in the concrete surface layer, the structural strength of the concrete surface layer is enhanced; at the same time, the load-bearing plate connected to the arched frame is used to bear part of the water pressure, so as to provide a certain protection for the concrete surface layer and reduce the risk of cracking of the concrete surface layer.

[0024] 2. By providing through holes for threaded rods to pass through in the load-bearing plate and setting a stop piece at the end of the threaded rod, the load-bearing plate can be installed simply by screwing the stop piece and the threaded rod without rotating the load-bearing plate, thus improving the ease of installation.

[0025] 3. By creating bending grooves on the surface of the load-bearing plate, it is easier to bend the plate, so that the load-bearing plate can fit more closely to the concrete surface after installation, ensuring the protective effect of the load-bearing plate on the concrete surface. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the overall structure of an embodiment of this application.

[0027] Figure 2 It is a schematic diagram used to show the connection structure between the load-bearing plate and the arch frame.

[0028] Figure 3 It is a schematic diagram used to show the arrangement of bending grooves on a load-bearing plate.

[0029] Explanation of reference numerals in the attached drawings: 1. Concrete surface layer; 2. Arch frame; 21. Support rod; 3. Horizontal frame; 4. Load-bearing plate; 41. Through hole; 42. Bending groove; 5. Connecting rod; 51. Threaded cavity; 6. Threaded rod; 61. Abutment part. Detailed Implementation

[0030] The following is in conjunction with the appendix Figure 1-3 This application will be described in further detail.

[0031] This application discloses a lining structure for a water conveyance tunnel. (Refer to...) Figure 1A water conveyance tunnel lining structure includes a concrete surface layer 1, an arched frame 2, a cross frame 3, and a load-bearing plate 4. The concrete surface layer 1 covers the inner wall of the tunnel.

[0032] Multiple arched frames 2 are provided, arranged at intervals along the length of the tunnel, and embedded in the concrete surface layer 1. Multiple support rods 21 are fixed to the surface of the arched frames 2 near the inner wall of the tunnel, also arranged at intervals along the length of the arched frames 2. All support rods 21 are inclined upwards, forming a support space between the support rods 21 and the arched frames 2 for the passage of the crossbeams 3.

[0033] The support rod 21 and the arch frame 2 can be fixed by welding, or they can be integrally formed, or they can be detachably connected by snap-fit ​​or screw-fit.

[0034] There are multiple crossbeams 3, all of which extend along the length of the tunnel. The multiple crossbeams 3 are arranged at intervals in a direction perpendicular to their own axis.

[0035] The arch frame 2 is equipped with multiple steel wires (not shown in the figure). These wires are used to bind the cross frame 3 to the arch frame 2, thereby strengthening the connection between the cross frame 3 and the arch frame 2. During lining construction, multiple arch frames 2 are first installed one by one in the tunnel. Then, the cross frame 3 is passed through the support space formed between the support rod 21 and the arch frame 2. After the cross frame 3 is placed, it is bound to the arch frame 2 at the location of the support rod 21 using steel wires, thus making the connection between the cross frame 3 and the arch frame 2 detachable.

[0036] Before construction, the steel wire can be welded to the support rod 21 of the arch frame 2 at the middle position, or the steel wire can be used for binding after the cross frame 3 is installed.

[0037] It is understood that in other embodiments, the crossbeam 3 and the arch frame 2 can also be detachably connected in other ways, for example, by opening holes in the arch frame 2 for the crossbeam 3 to pass through.

[0038] Reference Figure 2 A connecting rod 5 is provided on the surface of the arch frame 2 away from the inner wall of the tunnel. A threaded cavity 51 is opened on the end face of the connecting rod 5 away from the arch frame 2. The connecting rod 5 is threadedly connected to a threaded rod 6 through the threaded cavity 51. A through hole 41 is opened through the stress plate 4 for the threaded rod 6 to pass through. An abutment 61 is provided on the end of the threaded rod 6 away from the arch frame 2. The abutment 61 is used to abut against the surface of the stress plate 4 away from the connecting rod 5.

[0039] Furthermore, a sealing element is threadedly connected to the end of the connecting rod 5 via a threaded cavity 51. The sealing element is used to open and close the port of the threaded cavity 51 to prevent the concrete from blocking the port of the threaded cavity 51 during concrete spraying. The surface of the sealing element is sprayed with a concrete release agent so that the sealing element can be removed from the connecting rod 5 after the concrete is sprayed.

[0040] In this embodiment, a threaded rod 6 is used as a sealing element.

[0041] Reference Figure 3 Furthermore, the load-bearing plate 4 has multiple bending grooves 42, which extend along the length of the crossbeam 3. The two ends of the bending grooves 42 penetrate the two end faces of the load-bearing plate 4. The multiple bending grooves 42 are arranged at intervals in a direction perpendicular to their own axis, so that the load-bearing plate 4 can better fit the concrete surface layer 1 and ensure the protective effect of the load-bearing plate 4 on the concrete surface layer 1.

[0042] The load-bearing plate 4 can be made of rubber or alloy support.

[0043] In this embodiment, only one of the five connecting rods is provided. However, in other embodiments, multiple connecting rods can be provided, and correspondingly, multiple threaded rods and through holes are also provided, thereby forming multiple connection points between the load-bearing plate and the arch frame. This allows some water pressure to be transmitted to the arch frame through the load-bearing plate, reducing the risk of cracking in the concrete surface layer.

[0044] The implementation principle of a water conveyance tunnel lining structure according to an embodiment of this application is as follows: During lining construction, multiple arched frames 2 are first installed in the tunnel, with consistent spacing between each arched frame 2. Then, a horizontal frame 3 is passed through the space between the arched frame 2 and the tunnel wall, and its position is adjusted until it rests on a support rod 21. The horizontal frame 3 is then secured to the arched frame 2 using steel wire at the location of the support rod 21. Next, concrete is sprayed, and after the concrete has solidified to form a concrete surface layer 1, the sealing component is removed from the connecting rod 5. A threaded rod 6 is used to connect a load-bearing plate 4 to the connecting rod 5, and the threaded rod 6 is tightened until the load-bearing plate 4 adheres to the concrete surface layer 1. When water flows through the tunnel, the load-bearing plate 4 bears a portion of the water pressure, thereby reducing the risk of cracking of the concrete surface layer 1 under water pressure.

[0045] The above are all preferred embodiments of this application and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A lining structure for a water conveyance tunnel, characterized in that: The system includes a concrete surface layer (1), an arch frame (2), a cross frame (3), and a load-bearing plate (4). The concrete surface layer (1) covers the inner wall of the tunnel. Multiple arch frames (2) are provided, and the multiple arch frames (2) are arranged at intervals along the length of the tunnel. The arch frames (2) are embedded in the concrete surface layer (1). Multiple cross frames (3) are provided, and the cross frames (3) extend along the length of the tunnel. The multiple cross frames (3) are arranged at intervals along a direction perpendicular to their own axis. The multiple cross frames (3) are all connected to the arch frame (2). Multiple load-bearing plates (4) are provided, and the multiple load-bearing plates (4) are detachably connected to the arch frame (2). The load-bearing plates (4) are attached to the inner wall of the concrete surface layer (1).

2. The water conveyance tunnel lining structure according to claim 1, characterized in that: The cross frame (3) is detachably connected to the arch frame (2).

3. The water conveyance tunnel lining structure according to claim 2, characterized in that: The arch frame (2) has multiple support rods (21) on its surface near the inner wall of the tunnel. The multiple support rods (21) are arranged at intervals along the length of the arch frame (2). The multiple support rods (21) are all inclined upwards, and a support space is formed between the support rods (21) and the arch frame (2) for the cross frame (3) to pass through.

4. The water conveyance tunnel lining structure according to claim 3, characterized in that: The arch frame (2) is provided with steel wires, which are used to tie the cross frame (3) to the arch frame (2).

5. The water conveyance tunnel lining structure according to claim 1, characterized in that: The arch frame (2) is provided with a connecting rod (5), and the end face of the connecting rod (5) away from the arch frame (2) is provided with a threaded cavity (51). The force plate (4) is provided with a threaded rod (6), and the threaded rod (6) is threadedly engaged with the threaded cavity (51).

6. The water conveyance tunnel lining structure according to claim 5, characterized in that: The end of the connecting rod (5) is threadedly connected to a sealing member through the threaded cavity (51), and the sealing member is used to open and close the port of the threaded cavity (51).

7. A water conveyance tunnel lining structure according to claim 5 or 6, characterized in that: The surface of the force plate (4) is provided with a through hole (41) for the threaded rod (6) to pass through; the end of the threaded rod (6) is provided with an abutment (61) for abutting against the surface of the force plate (4) away from the connecting rod (5).

8. The water conveyance tunnel lining structure according to claim 7, characterized in that: The load-bearing plate (4) has multiple bending grooves (42), which extend along the length of the cross frame (3). The two ends of the bending grooves (42) penetrate the two end faces of the load-bearing plate (4), and the multiple bending grooves (42) are arranged at intervals along a direction perpendicular to their own axis.

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