An arc-shaped floor trolley for a flood discharge tunnel and its construction method

Abstract

This invention discloses an arc-shaped floor trolley for flood discharge tunnels and its construction method, including a needle beam frame. A movable frame is provided on the outer side of the needle beam frame, and a bottom connecting frame is fixedly connected to the lower end of the movable frame. An arc-shaped base plate is provided below the bottom connecting frame. This invention utilizes a traction rope and a limiting block, allowing the limiting block to rotate and the traction rope to wind together, increasing traction strength. This design also allows force to be applied to the limiting block. When replacing the arc-shaped base plate, a second hydraulic cylinder extends while a first hydraulic cylinder retracts. After the arc-shaped base plate contacts the ground, the traction rope can press the limiting block downwards. When the limiting block disengages from the extension frame, the traction rope can rotate the limiting block, and a second limiting plate restricts the position of the limiting block, ensuring it can be removed from the first connecting slot. Then, the second hydraulic cylinder retracts or the first hydraulic cylinder extends, disengaging the limiting block from the first connecting slot and allowing the arc-shaped base plate to be removed.

Description

Technical Field

[0001] This invention relates to the field of water conservancy and hydropower engineering construction technology, specifically to an arc-shaped floor trolley for flood discharge tunnels and its construction method. Background Technology

[0002] A lining trolley, also known as a lining trolley, is mainly used for pouring concrete for secondary linings in tunnels and water diversion tunnels. As a crucial component of water conservancy and hydropower projects, the construction quality of spillway tunnels directly affects the safety and stability of the entire project.

[0003] In existing technologies, when using a trolley to construct the arc-shaped bottom plate of a spillway, a release agent needs to be applied to the lower surface of the arc-shaped plate. Even with the release agent, the traction force between the trolley and the arc-shaped plate is still relatively large during demolding, which can easily cause the arc-shaped plate to gradually bend under stress and change from its initial shape. This can easily affect the subsequent construction of other parts of the spillway. Since the arc-shaped plate is fixed to the trolley by welding or bolts, the replacement time is long and inconvenient. Summary of the Invention

[0004] The purpose of this invention is to provide an arc-shaped floor trolley for flood discharge tunnels and its construction method, in order to solve the problems mentioned in the background art. When using the trolley to construct the arc-shaped floor slab at the bottom of the flood discharge tunnel, it is necessary to apply a release agent to the lower surface of the arc-shaped plate at the bottom of the trolley. Even with the release agent, the traction force between the trolley and the arc-shaped plate is relatively large during demolding, which easily causes the arc-shaped plate to gradually bend under stress and change from its initial shape. This can easily affect the subsequent construction of other parts of the flood discharge tunnel. Since the arc-shaped plate is fixed to the trolley by welding or bolts, the replacement time is long and inconvenient.

[0005] To achieve the above objectives, the present invention provides the following technical solution: an arc-shaped floor trolley method for flood discharge tunnels, comprising a needle beam frame, a movable frame provided on the outer side of the needle beam frame, a bottom connecting frame fixedly connected to the lower end of the movable frame, an arc-shaped bottom plate provided below the bottom connecting frame, a second reinforcing rib fixedly connected to the upper end of the arc-shaped bottom plate, a connecting plate provided above the arc-shaped bottom plate, a third reinforcing rib fixedly connected between the lower end of the connecting plate and the arc-shaped bottom plate, a first connecting groove formed at the upper end of the connecting plate and the upper ends of the third and second reinforcing ribs, an extension frame fixedly connected to the lower end of the extension frame, a second limiting plate fixedly connected to the lower end of the extension frame, a limiting block snapped into the interior of the extension frame, a traction rope fixedly connected to the upper end of the limiting block, a bottom plate fixedly connected to the upper end of the traction rope, and a second hydraulic cylinder installed at the upper end of the bottom plate.

[0006] Preferably, a hexagonal nut is fixedly connected to the upper end of the base plate, and the hexagonal nut is threadedly connected to the output end of the second hydraulic cylinder.

[0007] Preferably, a limiting plate is fixedly connected to the upper middle part of the limiting block, and a second connecting groove is opened on both sides of the upper end of the limiting block, and a magnet is fixedly connected inside the second connecting groove.

[0008] Preferably, a slide rail is fixedly connected to the upper end of the needle beam frame, a support plate is fixedly connected to the upper end of the slide rail, and a guide rail is slidably connected inside the support plate.

[0009] Preferably, the guide rail is fixedly connected to the movable frame, and rollers are rotatably connected to both sides of the movable frame. The rollers overlap with the needle beam frame, and the upper two sides of the needle beam frame are used to install winches to drive the movable frame to move.

[0010] Preferably, a side connecting frame is fixedly connected between the outer side of the movable frame and the upper end of the bottom connecting frame, and a second side connecting frame is fixedly connected to both ends of the bottom connecting frame.

[0011] Preferably, a second connecting frame is fixedly connected to the lower end of the bottom connecting frame, a first limiting plate is fixedly connected to the lower end of the second connecting frame, a support frame is fixedly connected to the upper end of the first limiting plate, the second hydraulic cylinder is fixedly connected to the support frame, and side fixing frames are fixedly connected between the two sides of the upper end of the first limiting plate and the side connecting frame.

[0012] Preferably, the upper end of the first limiting plate has a through groove extending through the inner side of the support frame, the support frame has a limiting arc groove inside, the bottom plate is slidably connected to the limiting arc groove, a first reinforcing rib is fixedly connected to one side of the support frame, side plates are fixedly connected to both sides of the upper end of the arc-shaped bottom plate, a supporting mesh plate is installed at the lower end inside the needle beam frame, and a first side connecting frame is fixedly connected to both ends of both sides of the needle beam frame, and a side sliding groove is opened on the inner side of the first side connecting frame.

[0013] Preferably, a No. 1 connecting frame is slidably connected inside the side sliding groove, a No. 1 hydraulic cylinder is fixedly connected inside the No. 1 side connecting frame, the output end of the No. 1 hydraulic cylinder is fixedly connected to the No. 1 connecting frame, a connecting claw is fixedly connected to the lower end of the No. 1 connecting frame, a limiting frame is installed at the lower end of the connecting claw, and a bottom support frame is installed between the connecting claw and the limiting frame.

[0014] A construction method for an arc-shaped floor trolley used in a flood discharge tunnel includes the following steps:

[0015] S1. Determine the construction location and dimensions of the curved floor according to the construction drawings and actual site conditions;

[0016] S2. Select a suitable arc-shaped base plate according to construction needs, and transport the arc-shaped base plate and other components of this device to the construction site.

[0017] S3. Connect the movable frame to the needle beam frame, and place the selected arc-shaped base plate under the bottom support frame;

[0018] S4. The first hydraulic cylinder retracts until the limiting block is at a height that allows it to connect with the first connecting slot.

[0019] S5. Based on the position of the second limiting plate, rotate the limiting block 180° and insert the limiting block into the extension frame;

[0020] S6. Rotate the limiting block another 90° and lift the traction rope upward so that the limiting block engages with the extension frame;

[0021] S7. Control the retraction of hydraulic cylinder No. 2 to lift the limiting block, thereby moving the arc-shaped base plate until the upper end of the connecting plate contacts the lower end of limiting plate No. 1, and the limiting plate engages with the through slot.

[0022] S8. Tie the reinforcing bars in the construction area, apply release agent to the lower end of the arc-shaped base plate, move the arc-shaped base plate above the reinforcing bars, control the retraction of the No. 1 hydraulic cylinder, so that the arc-shaped base plate is in the area where the floor needs to be poured.

[0023] S9. Pour concrete into the reinforced area. After the concrete has solidified, the No. 1 hydraulic cylinder retracts to suspend the bottom support frame. Control the winch to start and move the needle beam frame. Place sleepers under one of the bottom support frames.

[0024] S10. The No. 1 hydraulic cylinder extends to demold the arc-shaped base plate from the floor. Then, the concrete at the lower end of the arc-shaped base plate is flushed and a release agent is applied.

[0025] S11. Continue to tie the reinforcing bars on one side of the formed arc-shaped floor. After the binding is completed, retract the No. 1 hydraulic cylinder to position the arc-shaped bottom plate in the required position, pour concrete, and wait for the concrete to form. Repeat this process to construct the arc-shaped floor of the flood discharge tunnel.

[0026] S12. When the curved base plate needs to be replaced, control the second hydraulic cylinder to extend, and then control the first hydraulic cylinder to retract. After the curved base plate contacts the ground, as the limiting block continues to fall, the limiting block will disengage from the extension frame. The limiting block will rotate and be restrained by the second limiting plate. Then, the first hydraulic cylinder will extend to disengage the limiting block from the first connecting groove. The curved base plate can be removed, and the new curved base plate can be placed under the first limiting plate. Repeat steps S4-S7 to complete the replacement.

[0027] Compared with the prior art, the beneficial effects of the present invention are:

[0028] 1. In this invention, the setting of the traction rope and the limiting block allows the limiting block to rotate, causing the traction rope to coil together, which increases the traction strength. At the same time, this design can apply force to the limiting block. When replacing the arc-shaped base plate, the second hydraulic cylinder extends and the first hydraulic cylinder retracts. After the arc-shaped base plate contacts the ground, the traction rope can press the limiting block downward. When the limiting block is disengaged from the extension frame, the traction rope can drive the limiting block to rotate. The second limiting plate restricts the position of the limiting block, ensuring that the limiting block can be removed from the first connecting slot. Then, the second hydraulic cylinder retracts or the first hydraulic cylinder extends, which can disengage the limiting block from the first connecting slot, allowing the arc-shaped base plate to be removed. In this way, the disassembly and assembly of the arc-shaped base plate is quicker and simpler to use, thereby improving the construction efficiency of the arc-shaped floor of the flood discharge tunnel.

[0029] 2. In this invention, the hexagonal nut facilitates the disassembly and replacement of the traction rope. This method has a simple structure and low cost. The magnet increases the connection strength between the limiting block and the extension frame when the limiting block is snapped into place, preventing the limiting block from detaching from the extension frame when connecting the limiting block to the arc-shaped base plate, thus ensuring the stability of the arc-shaped base plate during installation.

[0030] 3. In this invention, the side plates facilitate the hoisting of the arc-shaped base plate. The second and third reinforcing ribs increase the strength of the arc-shaped base plate, thereby increasing its service life. The side sliding grooves guide the first connecting frame, increasing stability during use. The side connecting frames increase the strength of the bottom connecting frame, making the movement of the mobile frame more stable. The limiting arc grooves guide the position of the base plate, resulting in higher stability. Attached Figure Description

[0031] Figure 1 This is a three-dimensional structural diagram of an arc-shaped floor trolley for a flood discharge tunnel and its construction method according to the present invention. Figure 1 ;

[0032] Figure 2 This invention relates to an arc-shaped floor trolley for flood discharge tunnels and its construction method. Figure 1 Enlarged structural diagram of region A in the middle;

[0033] Figure 3 This is a schematic diagram of the structure of an arc-shaped floor trolley for a flood discharge tunnel and its construction method according to the present invention. Figure 2 ;

[0034] Figure 4 This invention relates to an arc-shaped floor trolley for flood discharge tunnels and its construction method. Figure 3 Enlarged structural diagram of region B in the middle;

[0035] Figure 5This is a three-dimensional structural diagram of the arc-shaped bottom plate in the arc-shaped floor trolley and its construction method for a flood discharge tunnel according to the present invention.

[0036] Figure 6 This is a schematic diagram of the lower end structure of the connecting plate in the arc-shaped floor trolley for flood discharge tunnel and its construction method of the present invention;

[0037] Figure 7 This is a schematic diagram of the connection structure between the No. 2 hydraulic cylinder and the limiting block in the arc-shaped floor trolley for flood discharge tunnel and its construction method of the present invention.

[0038] Figure 8 This is an exploded view of the connection structure between the No. 2 hydraulic cylinder and the limiting block in the arc-shaped floor trolley for a flood discharge tunnel and its construction method of the present invention.

[0039] In the picture:

[0040] 1. Needle beam frame; 2. Support mesh plate; 3. No. 1 side connecting frame; 4. No. 1 hydraulic cylinder; 5. Side sliding groove; 6. No. 1 connecting frame; 7. Bottom support frame; 8. Connecting claw; 9. Limiting frame; 10. Moving frame; 11. Support plate; 12. Slide rail; 13. Arc-shaped bottom plate; 14. Side connecting frame; 15. Bottom connecting frame; 16. No. 2 side connecting frame; 17. No. 2 connecting frame; 18. No. 1 limiting plate; 19. Side fixing frame; 20. No. 2 hydraulic cylinder 21. Cylinder; 22. Support frame; 23. First reinforcing rib; 24. Through groove; 25. Restricting arc groove; 26. Base plate; 27. Guide rail; 28. Side plate; 29. ​​Second reinforcing rib; 30. Third reinforcing rib; 31. Connecting plate; 32. First connecting groove; 33. Extension frame; 34. Second restricting plate; 35. Hexagonal nut; 36. Traction rope; 37. Restricting clamp; 38. Restricting block; 39. Magnet; 30. Second connecting groove. Detailed Implementation

[0041] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0042] Example 1: Refer to Figure 1 - Figure 8As shown: An arc-shaped floor trolley for a flood discharge tunnel includes a needle beam frame 1, a movable frame 10 arranged on the outer side of the needle beam frame 1, a bottom support frame 15 fixedly connected to the lower end of the movable frame 10, an arc-shaped bottom plate 13 arranged below the bottom support frame 15, a second reinforcing rib 28 fixedly connected to the upper end of the arc-shaped bottom plate 13, a connecting plate 30 arranged above the arc-shaped bottom plate 13, and a third reinforcing rib 29 fixedly connected between the lower end of the connecting plate 30 and the arc-shaped bottom plate 13. A first connecting groove 31 is opened at the upper end of the connecting plate 30 and the upper ends of the third reinforcing rib 29 and the second reinforcing rib 28. An extension frame 32 is fixedly connected to the lower end of the connecting plate 30. A second limiting plate 33 is fixedly connected to the lower end of the extension frame 32. A limiting block 37 is snapped into the inside of the extension frame 32. A traction rope 35 is fixedly connected to the upper end of the limiting block 37. A base plate 25 is fixedly connected to the upper end of the traction rope 35. A second hydraulic cylinder 20 is installed on the upper end of the base plate 25.

[0043] In this invention, the traction rope 35 and the limiting block 37 are designed to allow the limiting block 37 to rotate, causing the traction rope 35 to wrap around the limiting block 37, thus increasing the traction strength. This design also allows force to be applied to the limiting block 37. When replacing the arc-shaped base plate 13, a second hydraulic cylinder 20 extends while a first hydraulic cylinder 4 retracts. After the arc-shaped base plate 13 contacts the ground, the traction rope 35 can press the limiting block 37 downwards. When the limiting block 37 is disengaged from the extension frame 32, the traction rope 35 can rotate the limiting block 37. The second limiting plate 33 then restricts the position of the limiting block 37, ensuring it can be removed from the first connecting slot 31. The second hydraulic cylinder 20 then retracts or the first hydraulic cylinder 4 extends, disengaging the limiting block 37 from the first connecting slot 31 and allowing the arc-shaped base plate 13 to be removed. This makes the disassembly and assembly of the arc-shaped base plate 13 quicker and simpler, improving the construction efficiency of the arc-shaped floor of the flood discharge tunnel.

[0044] Example 2: Figure 1 - Figure 8 As shown, a hexagonal nut 34 is fixedly connected to the upper end of the base plate 25. The hexagonal nut 34 is threadedly connected to the output end of the second hydraulic cylinder 20. A limiting plate 36 is fixedly connected to the middle of the upper end of the limiting block 37. A second connecting groove 39 is opened on both sides of the upper end of the limiting block 37. A magnet 38 is fixedly connected inside the second connecting groove 39. A slide rail 12 is fixedly connected to the upper end of the needle beam frame 1. A support plate 11 is fixedly connected to the upper end of the slide rail 12. A guide rail 26 is slidably connected inside the support plate 11. The guide rail 26 is fixedly connected to the moving frame 10. Rollers are rotatably connected to both sides of the moving frame 10. The rollers overlap with the needle beam frame 1. The upper sides of the needle beam frame 1 are used to install winches to drive the moving frame 10 to move. Side connecting frames 14 are fixedly connected between the outer side of the moving frame 10 and the upper end of the bottom connecting frame 15.

[0045] In this invention, the hexagonal nut 34 facilitates the disassembly and replacement of the traction rope 35. This method is simple in structure and low in cost. The magnet 38 increases the connection strength between the limiting block 37 and the extension frame 32 when the limiting block 37 is snapped into place with the extension frame 32. This prevents the limiting block 37 from detaching from the extension frame 32 when the limiting block 37 is connected to the arc-shaped base plate 13, thus ensuring the stability of the arc-shaped base plate 13 during installation.

[0046] Example 3: According to Figure 1 - Figure 5 As shown, two side connecting frames 16 are fixedly connected to both ends of the bottom connecting frame 15. A second connecting frame 17 is fixedly connected to the lower end of the bottom connecting frame 15. A first limiting plate 18 is fixedly connected to the lower end of the second connecting frame 17. A support frame 21 is fixedly connected to the upper end of the first limiting plate 18. A second hydraulic cylinder 20 is fixedly connected to the support frame 21. Side fixing frames 19 are fixedly connected between the two sides of the upper end of the first limiting plate 18 and the side connecting frame 14. A through groove 23 is opened through the upper end of the first limiting plate 18 inside the support frame 21. A limiting arc groove 24 is opened inside the support frame 21. The bottom plate 25 is slidably connected to the limiting arc groove 24. A reinforcing rib 22 is fixedly connected to one side. Side plates 27 are fixedly connected to both sides of the upper end of the arc-shaped base plate 13. A support mesh plate 2 is installed at the lower end of the needle beam frame 1. A side connecting frame 3 is fixedly connected to both ends of both sides of the needle beam frame 1. A side sliding groove 5 is opened on the inner side of the side connecting frame 3. A connecting frame 6 is slidably connected inside the side sliding groove 5. A hydraulic cylinder 4 is fixedly connected inside the side connecting frame 3. The output end of the hydraulic cylinder 4 is fixedly connected to the connecting frame 6. A connecting claw 8 is fixedly connected to the lower end of the connecting claw 6. A limiting frame 9 is installed at the lower end of the connecting claw 8. A bottom support frame 7 is installed between the connecting claw 8 and the limiting frame 9.

[0047] In this invention, the side plate 27 facilitates the hoisting of the arc-shaped base plate 13. The second reinforcing rib 28 and the third reinforcing rib 29 increase the strength of the arc-shaped base plate 13, thereby increasing its service life. The side sliding groove 5 guides the first connecting frame 6, increasing stability during use. The side connecting frame 14 increases the strength of the bottom connecting frame 15, making the movement of the moving frame 10 more stable. The limiting arc groove 24 guides the position of the base plate 25, resulting in higher stability.

[0048] Example 4: A construction method for an arc-shaped floor trolley for a spillway tunnel, comprising the following steps:

[0049] Step 1: Determine the construction location and dimensions of the curved floor based on the construction drawings and actual site conditions;

[0050] Step 2: Select a suitable arc-shaped base plate 13 according to construction needs, and transport the arc-shaped base plate 13 and other components of this device to the construction site;

[0051] Step 3: Connect the movable frame 10 to the needle beam frame 1, and place the selected arc-shaped base plate 13 below the bottom support frame 15;

[0052] Step 4: The first hydraulic cylinder 4 retracts until the limiting block 37 is at a height that allows it to connect with the first connecting slot 31;

[0053] Step 5: Based on the position of the second limiting plate 33, rotate the limiting block 37 180° and insert the limiting block 37 into the extension frame 32;

[0054] Step 6: Rotate the limiting block 37 another 90° and lift the traction rope 35 upwards so that the limiting block 37 engages with the extension frame 32.

[0055] Step 7: Control the retraction of hydraulic cylinder 20 to lift the limiting block 37, thereby moving the arc-shaped base plate 13 until the upper end of the connecting plate 30 contacts the lower end of the limiting plate 18, and the limiting plate 36 engages with the through groove 23.

[0056] Step 8: Tie the reinforcing bars in the construction area, apply release agent to the lower end of the arc-shaped base plate 13, move the arc-shaped base plate 13 above the reinforcing bars, control the retraction of hydraulic cylinder 4, so that the arc-shaped base plate 13 is in the area where the floor needs to be poured.

[0057] Step 9: Pour concrete into the area of ​​the reinforcing steel. After the concrete has solidified, hydraulic cylinder 4 retracts, suspending the bottom support frame 7. Control the winch to start, move the needle beam frame 1, and place a sleeper under one of the bottom support frames 7.

[0058] Step 10: Extend hydraulic cylinder 4 to demold the arc-shaped base plate 13 from the floor, then flush the concrete at the lower end of the arc-shaped base plate 13 and apply a release agent.

[0059] Step 11: Continue to tie the reinforcing bars on one side of the formed arc-shaped floor. After the binding is completed, retract the No. 1 hydraulic cylinder 4 to position the arc-shaped bottom plate 13 in the required position, pour concrete, and wait for the concrete to form. Repeat this process to construct the arc-shaped floor of the flood discharge tunnel.

[0060] Step 12: When the arc-shaped base plate 13 needs to be replaced, control the second hydraulic cylinder 20 to extend, and then control the first hydraulic cylinder 4 to retract. After the arc-shaped base plate 13 contacts the ground, as the limiting block 37 continues to fall, the limiting block 37 will disengage from the extension frame 32. The limiting block 37 will rotate and be restricted by the second limiting plate 33. Then, the first hydraulic cylinder 4 will extend to disengage the limiting block 37 from the first connecting groove 31. The arc-shaped base plate 13 will be removed. Then, the new arc-shaped base plate 13 will be placed under the first limiting plate 18. Repeat steps 4-7 to complete the replacement.

[0061] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An arc-shaped floor trolley for a flood discharge tunnel, comprising a needle beam frame (1), characterized in that, A movable frame (10) is provided on the outside of the needle beam frame (1). A bottom support frame (15) is fixedly connected to the lower end of the movable frame (10). An arc-shaped base plate (13) is provided below the bottom support frame (15). A second reinforcing rib (28) is fixedly connected to the upper end of the arc-shaped base plate (13). A connecting plate (30) is provided above the arc-shaped base plate (13). A third reinforcing rib (29) is fixedly connected between the lower end of the connecting plate (30) and the arc-shaped base plate (13). The upper end of the connecting plate (30) is connected to the third reinforcing rib. A first connecting groove (31) is provided at the upper end of (29) and the second reinforcing rib (28). An extension frame (32) is fixedly connected to the lower end of the connecting plate (30). A second limiting plate (33) is fixedly connected to the lower end of the extension frame (32). A limiting block (37) is snapped into the inside of the extension frame (32). A traction rope (35) is fixedly connected to the upper end of the limiting block (37). A base plate (25) is fixedly connected to the upper end of the traction rope (35). A second hydraulic cylinder (20) is installed on the upper end of the base plate (25).

2. The arc-shaped floor trolley for spillway tunnels according to claim 1, characterized in that: A hexagonal nut (34) is fixedly connected to the upper end of the base plate (25), and the hexagonal nut (34) is threadedly connected to the output end of the second hydraulic cylinder (20).

3. The arc-shaped floor trolley for flood discharge tunnels according to claim 2, characterized in that: A limiting plate (36) is fixedly connected to the upper middle part of the limiting block (37), and a second connecting groove (39) is opened on both sides of the upper end of the limiting block (37). A magnet (38) is fixedly connected inside the second connecting groove (39).

4. The arc-shaped floor trolley for spillway tunnels according to claim 3, characterized in that: The upper end of the needle beam frame (1) is fixedly connected to a slide rail (12), the upper end of the slide rail (12) is fixedly connected to a support plate (11), and the inside of the support plate (11) is slidably connected to a guide rail (26).

5. The arc-shaped floor trolley for spillway tunnels according to claim 4, characterized in that: The guide rail (26) is fixedly connected to the movable frame (10). Rollers are rotatably connected to both sides of the movable frame (10). The rollers overlap with the needle beam frame (1). The upper sides of the needle beam frame (1) are used to install winches to drive the movable frame (10) to move.

6. The arc-shaped floor trolley for spillway tunnels according to claim 5, characterized in that: Side connecting frames (14) are fixedly connected between the outer side of the movable frame (10) and the upper end of the bottom connecting frame (15), and second side connecting frames (16) are fixedly connected to both ends of the bottom connecting frame (15).

7. The arc-shaped floor trolley for spillway tunnels according to claim 6, characterized in that: The lower end of the bottom connecting frame (15) is fixedly connected to the second connecting frame (17), the lower end of the second connecting frame (17) is fixedly connected to the first limiting plate (18), the upper end of the first limiting plate (18) is fixedly connected to the support frame (21), the second hydraulic cylinder (20) is fixedly connected to the support frame (21), and the two sides of the upper end of the first limiting plate (18) are fixedly connected to the side connecting frame (14) with the side fixing frame (19).

8. The arc-shaped floor trolley for spillway tunnels according to claim 7, characterized in that: The upper end of the first limiting plate (18) is provided with a through groove (23) inside the support frame (21). The support frame (21) is provided with a limiting arc groove (24). The bottom plate (25) is slidably connected to the limiting arc groove (24). A first reinforcing rib (22) is fixedly connected to one side of the support frame (21). Side plates (27) are fixedly connected to both sides of the upper end of the arc-shaped bottom plate (13). A supporting mesh plate (2) is installed at the lower end inside the needle beam frame (1). A first side connecting frame (3) is fixedly connected to both ends of both sides of the needle beam frame (1). A side sliding groove (5) is provided on the inner side of the first side connecting frame (3).

9. The arc-shaped floor trolley for spillway tunnels according to claim 8, characterized in that: A connecting frame (6) is slidably connected inside the side sliding groove (5). A hydraulic cylinder (4) is fixedly connected inside the first side connecting frame (3). The output end of the first hydraulic cylinder (4) is fixedly connected to the first connecting frame (6). A connecting claw (8) is fixedly connected to the lower end of the first connecting frame (6). A limiting frame (9) is installed at the lower end of the connecting claw (8). A bottom support frame (7) is installed between the connecting claw (8) and the limiting frame (9).

10. A construction method for an arc-shaped floor trolley for a flood discharge tunnel, characterized in that: The use of an arc-shaped floor trolley for a spillway tunnel as described in any one of claims 1-9 includes the following steps: S1. Determine the construction location and dimensions of the curved floor according to the construction drawings and actual site conditions; S2. Select a suitable arc-shaped base plate (13) according to construction needs, and transport the arc-shaped base plate (13) and other components of this device to the construction site. S3. Connect the movable frame (10) to the needle beam frame (1) and place the selected arc-shaped base plate (13) below the bottom support frame (15); S4, the first hydraulic cylinder (4) retracts until the limiting block (37) is at a height that can connect with the first connecting groove (31); S5. Based on the position of the second limiting plate (33), rotate the limiting block (37) 180° and insert the limiting block (37) into the extension frame (32); S6. Rotate the limiting block (37) by 90° and lift the traction rope (35) upward so that the limiting block (37) engages with the extension frame (32); S7. Control the retraction of the second hydraulic cylinder (20) to lift the limiting block (37), thereby moving the arc-shaped base plate (13) until the upper end of the connecting plate (30) contacts the lower end of the first limiting plate (18), and the limiting plate (36) engages with the through groove (23). S8. Tie the reinforcing bars in the construction area, apply release agent to the lower end of the arc-shaped base plate (13), move the arc-shaped base plate (13) above the reinforcing bars, control the first hydraulic cylinder (4) to retract, so that the arc-shaped base plate (13) is in the area where the floor needs to be poured. S9. Pour concrete into the steel reinforcement area. After the concrete solidifies, the No. 1 hydraulic cylinder (4) contracts, causing the bottom support frame (7) to be suspended. Control the winch to start, causing the needle beam frame (1) to move, and place a sleeper under one of the bottom support frames (7). S10, the No. 1 hydraulic cylinder (4) extends to demold the arc-shaped base plate (13) from the floor, then flush the concrete at the lower end of the arc-shaped base plate (13) and apply a release agent; S11. Continue to tie the reinforcing bars on one side of the formed arc floor. After the binding is completed, retract the No. 1 hydraulic cylinder (4) to make the arc bottom plate (13) be in the required position, pour concrete, and wait for the concrete to form. Repeat this process to carry out the construction of the arc floor of the flood discharge tunnel. S12. When the arc-shaped base plate (13) needs to be replaced, control the second hydraulic cylinder (20) to extend, and then control the first hydraulic cylinder (4) to retract. After the arc-shaped base plate (13) contacts the ground, as the limiting block (37) continues to fall, the limiting block (37) will be disengaged from the extension frame (32). The limiting block (37) rotates and is restricted by the second limiting plate (33). Then the first hydraulic cylinder (4) extends to disengage the limiting block (37) from the first connecting groove (31). The arc-shaped base plate (13) is then removed. The new arc-shaped base plate (13) is then placed under the first limiting plate (18). Repeat steps S4-S7 to complete the replacement.

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