Safety construction equipment and construction technology for bridge pile foundation close to draft tube

Abstract

The invention relates to safety construction equipment for a bridge pile foundation close to a draft tube, and belongs to the field of bridge construction.The safety construction equipment comprises a positioning block, a discharging hole allowing a reinforcement cage to penetrate through is formed in the middle of the positioning block, and a plurality of positioning plates are arranged in the positioning block; each positioning plate can abut against the reinforcement cage and drive the reinforcement cage to move to the middle of the discharging hole, a plurality of bottom moving blocks are arranged on the lower side of the positioning block, linkage assemblies are arranged in the positioning blocks, and the bottom moving blocks can drive the positioning plates to move and abut against the reinforcement cage through the linkage assemblies in the moving process. And safe construction of the adjacent draft tube bridge pile foundation is achieved. The invention further discloses a safety construction process for the bridge pile foundation close to the draft tube. The safety construction process has the advantage of improving construction safety.

Description

Technical Field

[0001] The present application relates to the field of bridge construction, and in particular to a bridge pile foundation safety construction equipment and construction process near a tailwater pipe. Background Art

[0002] The tailwater pipe is located below the runner and is the main flow component. Its function is to guide the water flow in and out of the runner. One of the main functions of the tailwater pipe is to recover part of the water flow energy at the runner outlet. Let's observe how the tailwater pipe recovers energy. Under the broken line closing law, when closing first fast and then slow, the vacuum of the tailwater pipe occurs at the inflection point. When closing first slow and then fast, the vacuum of the tailwater pipe occurs around the moment when the guide vane is completely closed. However, when the effective time changes to a certain range, so that the slope of the two sections before and after changes very little, it is closed similar to the straight line law.

[0003] During the construction of the bridge of the hydropower station, the position of the tailwater pipe needs to be taken into consideration during the construction of the pile foundation of the bridge, and the construction process of the pile foundation needs to be carried out according to the actual situation of the tailwater pipe.

[0004] Currently, in the process of pile foundation construction, it is necessary to drill a hole first, then install a steel cage in the hole, and then pour concrete into the steel cage so that the steel cage and concrete are combined to form a concrete skeleton to support the concrete. However, since the distance between the outer wall of the steel cage and the inner wall of the drilled hole is small, the steel cage needs to be hoisted to the center position on the upper side of the hole during the placement of the steel cage, and the staff needs to be located at the bottom of the steel cage to make adjustments, which is relatively dangerous. Summary of the invention

[0005] In order to achieve safe construction of bridge pile foundations near tailwater pipes, the present application provides safe construction equipment and construction technology for bridge pile foundations near tailwater pipes.

[0006] In the first aspect, the present application provides a bridge pile foundation safety construction device near the tailwater pipe, which adopts the following technical solution:

[0007] A safe construction equipment for bridge pile foundation near the tailwater pipe includes: a positioning block, a feeding hole for a steel cage to pass through is opened in the middle position of the positioning block, a plurality of positioning plates are arranged inside the positioning block, each of the positioning plates can abut against the steel cage and drive the steel cage to move to the middle position of the feeding hole, a plurality of bottom moving blocks are arranged on the lower side of the positioning block, a linkage assembly is arranged inside the positioning block, and the bottom moving block can drive the positioning plate to move and abut against the steel cage through the linkage assembly during the movement process.

[0008] By adopting the above technical solution, when it is necessary to hoist the steel cage, the positioning block is first placed on the upper side of the hole, and then the end of the steel cage is placed inside the feeding hole. By moving the bottom moving block, multiple positioning plates are driven to abut against each other so that the positioning plates can drive the steel cage to move to the middle position of the feeding hole, and then the steel cage can be moved to the middle position of the lower hole during the lowering process. By expanding the size of the feeding hole, it is convenient for the staff to place the steel cage to the middle position inside the hole, and reduces the need for the staff to manually adjust the lower end position of the steel cage, which may cause danger.

[0009] Optionally, the linkage assembly includes a movable rack fixedly connected to one side of each positioning plate away from the side that can abut the steel cage, one side of each movable rack is meshed with a driving gear, and each driving gear is connected to a linkage gear through a transmission rod, each linkage gear is inserted into the adjacent bottom shift block, and each bottom shift block is provided with a driving rack meshed with the adjacent linkage gear.

[0010] By adopting the above technical scheme, the driving rack is driven to move during the movement of the bottom shifting block, and the driving rack drives the connected linkage gear to rotate during the movement, and the linkage gear drives the connected transmission rod and the driving gear to rotate during the rotation, and the driving gear drives the connected moving rack to move during the rotation, and the moving rack drives the connected positioning plate to move during the movement, thereby realizing the process of driving the positioning plate to move and driving the steel cage to move through the movement of the bottom shifting block.

[0011] Optionally, each of the bottom moving blocks is connected to a telescopic rod, and the lower end of each of the telescopic rods can penetrate the bottom side wall of the bottom moving block and abut against the inner wall of the hole drilled in the lower part, and the telescopic rod is slidably abutted against adjacent bottom moving blocks, and each of the telescopic rods is fixedly connected to the driving rack in the same bottom moving block.

[0012] By adopting the above technical solution, during use, the telescopic rod is first inserted into the inside of the hole, and then during the movement of the bottom moving block, the telescopic rod is brought into contact with the inner wall of the hole, and then as the bottom moving block moves, the telescopic rod drives the driving rack to move relative to the bottom moving block, thereby realizing the process of the driving rack driving the positioning plate to move, and by bringing the telescopic rod into contact with the inner wall of the hole, multiple bottom moving blocks can be moved the same distance by limiting the stroke of the telescopic rod, and then multiple positioning plates can cooperate with each other to drive the abutted steel cage to move to the middle position of the feeding hole.

[0013] Optionally, each side wall of the bottom shift block is connected to a lifting ring, and each side wall of the telescopic rod near the lower end is connected to a connecting rod, and one end of each connecting rod can be inserted into the lifting ring and restrict the telescopic rod within the bottom shift block.

[0014] By adopting the above technical solution and setting connecting rods and lifting rings, when the bottom moving block drives the positioning block to move to other construction sites, the connecting rod can be inserted into the inside of the lifting ring to limit the position of the telescopic rod, thereby reducing the phenomenon that the telescopic rod contacts the ground during the movement of the bottom moving block and affects the movement of the bottom moving block.

[0015] Optionally, each of the bottom shifting blocks is provided with a ground nail inside, each of the ground nails is connected to the linkage assembly and driven by the linkage assembly, the lower end of each of the ground nails can pass through the bottom shifting block and be plugged into the ground.

[0016] By adopting the above technical solution and setting ground nails, it is possible to limit the position of the bottom shift block through the ground nails, thereby reducing the phenomenon that during the subsequent splicing of the remaining steel cages, the movement of the bottom shift block causes the movement of the positioning plate, making it difficult to limit the position of the steel cage. The ground nails are driven to move by the linkage assembly, reducing the trouble of setting up a driving device to drive the ground nails to move.

[0017] Optionally, the linkage assembly further comprises a driving gear threadedly sleeved onto the outside of each of the ground nails, and each of the driving gears is meshed with an adjacent driving rack.

[0018] By adopting the above technical solution, when the telescopic rod drives the driving rack to move, the driving rack drives the connected active gear to rotate, and the active gear drives the connected ground nail to move during the rotation, thereby realizing the process of limiting the position of the bottom shift block by the ground nail.

[0019] Optionally, the top side wall of the positioning block is rotatably connected to a plurality of guide plates at a position around the feed hole, and each guide plate is used to guide the steel cage on the upper side of the positioning block into the feed hole.

[0020] By adopting the above technical solution and providing a guide plate, the guide plate can guide the end of the steel cage, thereby reducing the difficulty of the steel cage in entering the feed hole.

[0021] Optionally, each of the guide plates is connected to a linkage assembly, and the side of each guide plate away from the discharge hole can be rotated upward under the drive of the linkage assembly, and a tension spring is connected between the lower side of each guide plate and the top wall of the adjacent positioning block.

[0022] By adopting the above technical solution, by setting a guide plate connected to a linkage assembly and providing a tension spring, on the one hand, the guide plate can be driven to rotate through the linkage assembly during the movement of the bottom moving block, so that the guide plate guides the end of the steel cage. By providing a tension spring, when not in use, the guide plate can be fitted with the upper side wall of the positioning block under the action of the tension spring, thereby facilitating the process of staff carrying and placing the positioning block.

[0023] Optionally, a stop block is abutted against the lower side of each guide plate, and a movable lead screw is threadedly inserted into the lower side of each stop block, and each movable lead screw is fixedly connected to the adjacent transmission rod.

[0024] By adopting the above technical solution, when the bottom moving block moves and thus drives the driving rack to move relative to the bottom moving block, the driving rack drives the transmission rod to rotate, and the transmission rod drives the connected moving screw to rotate during the rotation process, and the moving screw drives the connected stop block to move during the rotation process, and the stop block drives the guide plate to rotate by abutting against the guide plate during the movement process.

[0025] In the second aspect, the present application provides a safe construction process for bridge pile foundations near the tailwater pipe, which adopts the following technical solutions:

[0026] A safe construction process for a bridge pile foundation near a tailwater pipe comprises the following steps:

[0027] S1: Excavation to determine the location and elevation of the tailwater pipe;

[0028] S2: Drilling and installing casing to protect the tailwater pipe before drilling;

[0029] S3: placing construction equipment and guiding the steel cage to be lowered into the hole through the construction equipment;

[0030] S4: Pour concrete and backfill the roadbed with lightweight foam soil.

[0031] By adopting the above technical solution, the tailwater pipe position is determined by excavation, and a casing is provided to protect the tailwater pipe during pile foundation construction. In addition, the safety of construction and subsequent use can be improved by providing lightweight foam soil.

[0032] In summary, the present application includes at least one of the following beneficial technical effects of safe construction equipment and construction process for bridge pile foundations near tailwater pipes:

[0033] 1. By setting the positioning block and the positioning plate, the position of the steel cage can be restricted, which reduces the trouble of the staff manually adjusting the position of the steel cage;

[0034] 2. By setting a linkage component and connecting the linkage component with the bottom shift block, it is convenient for the staff to adjust the position of the positioning plate;

[0035] 3. By setting a guide plate and connecting the guide plate with the linkage assembly, it is convenient for the staff to lift the lower end of the steel cage into the feed hole. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present application.

[0037] Figure 2 It is a cross-sectional view of the overall structure of an embodiment of the present application.

[0038] Figure 3 yes Figure 2 A partial enlarged schematic diagram of part B.

[0039] Explanation of the accompanying drawings: 1. Positioning block; 11. Feeding hole; 2. Positioning plate; 21. Positioning wheel; 3. Bottom moving block; 31. Roller; 4. Linkage assembly; 41. Moving rack; 42. Driving gear; 421. Transmission rod; 43. Linkage gear; 44. Driving rack; 45. Driving gear; 46. Moving screw; 5. Telescopic rod; 51. Sleeve rod; 52. Sliding rod; 53. Compression spring; 54. Connecting rod; 55. Lifting ring; 6. Ground nail; 61. Limit block; 7. Guide plate; 71. Tension spring; 8. Resistance block. DETAILED DESCRIPTION

[0040] The following is combined with Figure 1 -Attached Figure 3 The present invention is described in further detail.

[0041] The present application embodiment discloses a bridge pile foundation safety construction device near the tailwater pipe. Figure 1 and Figure 2 , including a positioning block 1, a feeding hole 11 is opened from top to bottom in the middle of the positioning block 1, and the cross-sectional size of the feeding hole 11 is larger than the size of the steel cage currently required for application. A plurality of positioning plates 2 are arranged inside the positioning tube. In this embodiment, the number of positioning plates 2 is four, and the four positioning plates 2 are evenly distributed around the center line of the feeding hole 11 in the same plane. A plurality of positioning wheels 21 are installed on one side of each positioning plate 2 close to the center line of the feeding hole 11.

[0042] A plurality of bottom moving blocks 3 are provided on the lower side of the positioning block 1. In this embodiment, four bottom moving blocks 3 are provided. The four bottom moving blocks 3 are provided in one-to-one correspondence with the four positioning plates 2, and each bottom moving block 3 is provided on the lower side of the corresponding positioning plate 2. A plurality of rollers 31 are installed on the lower side of each bottom moving block 3.

[0043] A linkage assembly 4 is provided inside the positioning block 1, and the linkage assembly 4 is connected to four positioning plates 2 and four bottom moving blocks 3, and can drive the positioning plate 2 to move through the movement of the bottom moving block 3, and make the positioning plate 2 connected to the roller 31 on one side abut against the steel cage inside the discharge hole 11.

[0044] During actual use, the steel cage is hoisted into the feed hole 11. Since the size of the feed hole 11 can be set to be larger than that of the steel cage, the steel cage is easier to enter the feed hole 11 than a drilled hole.

[0045] Afterwards, when the steel cage enters the discharge hole 11, it drives multiple bottom moving blocks 3 to move, so that the four bottom moving blocks 3 are located around the holes drilled below, so that the bottom moving blocks 3 drive the positioning plate 2 to abut against the steel cage inside the discharge hole 11 through the linkage assembly 4, and then the steel cage can be located in the middle position of the discharge hole 11 and move downward, so that the steel cage can move to the appropriate position inside the hole on the lower side, realizing the installation process of the steel cage.

[0046] Reference Figure 2 and Figure 3 The linkage assembly 4 includes a moving rack 41 fixedly connected to the side of each positioning plate 2 away from the connected positioning wheel 21, and each moving rack 41 is horizontally arranged. Each moving rack 41 is meshed with a driving gear 42, and the lower side of each driving gear 42 is fixedly connected to a vertically arranged transmission rod 421, and the lower end of each transmission rod 421 is inserted into the lower bottom moving block 3 and is slidably connected to the bottom moving block 3 in the horizontal direction.

[0047] The lower end of each transmission rod 421 is fixedly connected with a linkage gear 43 , each linkage gear 43 is meshed with a driving rack 44 , and each driving rack 44 is horizontally arranged.

[0048] A telescopic rod 5 is fixedly connected to one side of each driving rack 44 close to the center line of the discharge hole 11, and each telescopic rod 5 is vertically arranged.

[0049] Each telescopic rod 5 includes a sleeve rod 51 connected to the driving rack 44, and a slide rod 52 is penetrated and slidably connected to the lower side of each sleeve rod 51, and a compression spring 53 is fixedly connected between one end of each slide rod 52 inserted into the sleeve rod 51 and the inner wall of the sleeve rod 51. The lower end of each slide rod 52 can penetrate the bottom side wall of the bottom moving block 3 and abut against the inner wall of the lower hole under the drive of the compression spring 53.

[0050] During actual use, the sides of multiple bottom moving blocks 3 close to the center line of the discharge hole 11 are all located inside the lower hole, and then the four bottom moving blocks 3 are moved away from each other at the same time, and the lower ends of the sliding rods 52 connected to the four bottom moving blocks 3 are all in contact with the inner wall of the hole, and the bottom moving blocks 3 continue to be moved after the contact, so that the sleeve rod 51 connected to each bottom moving block 3 drives the connected driving rack 44 to move.

[0051] The driving rack 44 drives the connected linkage gear 43 to rotate during the movement, and each linkage gear 43 drives the connected transmission rod 421 to rotate during the rotation, and each transmission rod 421 drives the connected driving gear 42 to rotate during the rotation, and each driving gear 42 drives the connected moving rack 41 to move during the rotation, and each moving rack 41 drives the connected positioning plate 2 to move during the movement, so that the four positioning plates 2 are simultaneously in contact with the steel cage inside the discharge hole 11, thereby realizing the positioning process of the steel cage inside the discharge hole 11.

[0052] A connecting rod 54 is fixedly connected to one side of each slide bar 52 near the center line of the material discharge hole 11, and an end of each connecting rod 54 away from the connected slide bar 52 penetrates the side wall of the connected bottom moving block 3 near the center line of the material discharge hole 11 and is slidably connected to the side wall of the bottom moving block 3. A lifting ring 55 is fixedly connected to the side wall of each bottom moving block 3 near the center line of the material discharge hole 11, and each slide bar 52 can be inserted into the inside of the lifting ring 55 and abut against the lifting ring 55.

[0053] By setting the sliding rod 52 and the hanging ring 55, when it is necessary to drive the positioning block 1 to move to other holes through the bottom moving block 3, the sliding rod 52 can be inserted into the hanging ring 55, so that the lower end of the sliding rod 52 is located inside the bottom moving block 3, which facilitates the movement of the bottom moving block 3.

[0054] Each bottom moving block 3 is provided with a ground nail 6 on the side of the linkage gear 43 away from the telescopic rod 5. Each ground nail 6 is vertically arranged and the bottom of each ground nail 6 can penetrate the bottom side wall of the bottom moving block 3 and be inserted into the ground. A driving gear 45 is threadedly sleeved on the outside of each ground nail 6, and each driving gear 45 is meshed with an adjacent driving rack 44.

[0055] The outside of each ground nail 6 is fixedly connected to a limiting block 61 , and the side wall of each limiting block 61 is slidably abutted against the inner wall of the adjacent bottom moving block 3 along the vertical direction.

[0056] During the movement of the telescopic rod 5 relative to the bottom shift block 3, the telescopic rod 5 drives the connected driving rack 44 to move, and the driving rack 44 drives the connected active gear 45 to rotate during the movement. Under the action of the limit block 61, the active gear 45 drives the connected ground nail 6 to move downward during the rotation, thereby fixing the position of the bottom shift block 3, so that the steel cage can be more stable during the descent.

[0057] A plurality of guide plates 7 are provided on the upper side of the positioning block 1. In the present embodiment, four guide plates 7 are provided, and the four guide plates 7 are located on the upper side of the positioning plate 2 and are evenly distributed around the discharge hole 11. The side of each guide plate 7 close to the guide hole is rotatably connected to the adjacent side wall of the positioning block 1.

[0058] A stopper 8 is provided on the lower side of each guide plate 7, and the upper side of each stopper 8 abuts against the adjacent guide plate 7, and the lower side of each stopper 8 penetrates the top side wall of the positioning block 1 and slides and abuts against the side wall of the positioning block 1 in the vertical direction. A moving lead screw 46 is penetrated and threadedly connected to the lower side of each stopper 8, and the lower end of each moving lead screw 46 is fixedly connected to the adjacent transmission rod 421.

[0059] A tension spring 71 is fixedly connected to the lower side of one end of each guide plate 7 away from the connected positioning block 1 , and one side of each tension spring 71 away from the connected guide plate 7 is fixedly connected to the top wall of the adjacent positioning block 1 .

[0060] During actual use, when the bottom moving block 3 drives the sliding rod 52 to abut against the inner wall of the hole, the sliding rod 52 drives the connected driving rack 44 to move, and the driving rack 44 drives the connected linkage gear 43 and the transmission rod 421 to rotate during the movement, and the transmission rod 421 drives the connected abutment block 8 to move upward during the rotation, so that each guide plate 7 is gradually tilted downward from the side close to the discharge hole 11 to the side away from the discharge hole 11, thereby facilitating the subsequent process of the steel cage entering the discharge hole 11.

[0061] The embodiment of the present application also discloses a safe construction process for bridge pile foundations near the tailwater pipe.

[0062] S1: Excavate and determine the location of the tailwater pipe. In this embodiment, the excavation points are set to 20 locations around the tailwater pipe. The specific location is determined according to the current construction scenario.

[0063] S2: Drill holes at the preset location and use rotary drilling to reduce the impact of vibration caused by drilling on the hole. Before drilling, a long casing is installed to protect the tailwater pipe. The casing penetrates the gravel layer and enters the fully weathered rock layer 1m deep.

[0064] S3: Set the positioning block 1 on the upper side of the hole, insert the steel cage into the feed hole 11 and drive the steel cage to the middle position inside the hole through the positioning plate 2, and the steel cage is hoisted by a truck crane;

[0065] S4: Pour concrete into the hole and backfill the roadbed with lightweight foam soil.

[0066] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A bridge pile foundation safety construction equipment near the tailwater pipe, characterized in that: include: A positioning block (1), wherein a feeding hole (11) for a steel cage to pass through is provided in the middle of the positioning block (1), a plurality of positioning plates (2) are provided inside the positioning block (1), each of the positioning plates (2) can abut against the steel cage and drive the steel cage to move to the middle of the feeding hole (11), a plurality of bottom moving blocks (3) are provided on the lower side of the positioning block (1), a linkage assembly (4) is provided inside the positioning block (1), and the bottom moving blocks (3) can drive the positioning plates (2) to move and abut against the steel cage through the linkage assembly (4) during the movement process.

2. The bridge pile foundation safety construction equipment near the tailwater pipe according to claim 1 is characterized by: The linkage assembly (4) comprises a movable rack (41) fixedly connected to a side of each positioning plate (2) away from the side capable of abutting against the steel cage, one side of each movable rack (41) is meshed with a driving gear (42), and each driving gear (42) is connected to a linkage gear (43) via a transmission rod (421), each linkage gear (43) is plugged into the interior of an adjacent bottom shift block (3), and each bottom shift block (3) is provided with a driving rack (44) meshed with the adjacent linkage gear (43).

3. The bridge pile foundation safety construction equipment near the tailwater pipe according to claim 2 is characterized in that: Each bottom moving block (3) is internally connected to a telescopic rod (5), the lower end of each telescopic rod (5) can penetrate the bottom side wall of the bottom moving block (3) and abut against the inner wall of a hole drilled at the bottom, and the telescopic rod (5) is slidably abutted against adjacent bottom moving blocks (3), and each telescopic rod (5) is fixedly connected to the driving rack (44) in the same bottom moving block (3).

4. The bridge pile foundation safety construction equipment near the tailwater pipe according to claim 3 is characterized by: The side wall of each bottom moving block (3) is connected to a lifting ring (55), and the side wall of each telescopic rod (5) close to the lower end is connected to a connecting rod (54), and one end of each connecting rod (54) can be inserted into the inside of the lifting ring (55) and restrict the telescopic rod (5) within the bottom moving block (3).

5. The bridge pile foundation safety construction equipment near the tailwater pipe according to claim 3 is characterized by: Each of the bottom shifting blocks (3) is provided with a ground nail (6) inside, each of the ground nails (6) is connected to the linkage assembly (4), and driven by the linkage assembly (4), the lower end of each of the ground nails (6) can penetrate the bottom shifting block (3) and be plugged into the ground.

6. The bridge pile foundation safety construction equipment near the tailwater pipe according to claim 5 is characterized by: The linkage assembly (4) further comprises a driving gear (45) threadedly sleeved onto the outside of each of the ground nails (6), and each of the driving gears (45) is meshed with an adjacent driving rack (44).

7. The bridge pile foundation safety construction equipment near the tailwater pipe according to claim 3 is characterized by: The top side wall of the positioning block (1) is rotatably connected to a plurality of guide plates (7) at a position around the feed hole (11), and each guide plate (7) is used to guide the steel cage on the upper side of the positioning block (1) into the feed hole (11).

8. The bridge pile foundation safety construction equipment near the tailwater pipe according to claim 7, characterized in that: Each of the guide plates (7) is connected to the linkage assembly (4), and the side of each of the guide plates (7) away from the discharge hole (11) can be rotated upward under the drive of the linkage assembly (4), and a tension spring (71) is connected between the lower side of each of the guide plates (7) and the top wall of the adjacent positioning block (1).

9. The bridge pile foundation safety construction equipment near the tailwater pipe according to claim 8, characterized in that: The lower side of each guide plate (7) is in contact with a stop block (8), and the lower side of each stop block (8) is threadedly plugged with a movable lead screw (46), and each movable lead screw (46) is fixedly connected to an adjacent transmission rod (421).

10. A safe construction process for bridge pile foundation near tailwater pipe, characterized by: A bridge pile foundation safety construction device close to a tailwater pipe applicable to any one of claims 1 to 9, comprising the following steps: S1: Excavation to determine the location and elevation of the tailwater pipe; S2: Drilling and installing casing to protect the tailwater pipe before drilling; S3: placing construction equipment and guiding the steel cage to be lowered into the hole through the construction equipment; S4: Pour concrete and backfill the roadbed with lightweight foam soil.

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