Pile foundation auxiliary device for bridge construction and construction method thereof

Abstract

The present application relates to the field of bridge construction technology, especially relates to a pile foundation auxiliary device for bridge construction and a construction method thereof, the device comprises a cart, a discharging port is formed in the center position of the cart, and an outlet is formed in one side of the cart and communicates with the discharging port, a slide groove is formed on the cart and is distributed equidistantly in the circumferential direction, a sliding block is slidably connected in the slide groove, a supporting spring is fixedly connected between the sliding block and the slide groove, and a mounting frame is fixedly connected to the top of the sliding block. Through the cooperation of the electric hydraulic push rod, the ball and the track groove, the rotation displacement and the accurate reset of the reinforcement cage are realized, the accurate alignment of the reinforcement cage with the hole is ensured, in the lowering process, the guide mechanism composed of the positioning wheel and the torsional spring can automatically adhere to the reinforcement cage, the whole positioning and guiding is realized, the collision between the reinforcement cage and the hole wall is avoided, the hole wall collapse and the deformation of the reinforcement cage are effectively prevented, the compactness of the subsequent concrete pouring is ensured, and the pile foundation bearing capacity is improved.

Description

Technical Field

[0001] This invention relates to the field of bridge construction technology, and in particular to an auxiliary device for bridge construction pile foundations and its construction method. Background Technology

[0002] In the construction of bored piles for bridges, the lowering of the reinforcing cage and the hoisting of the splicing mold are key processes to ensure the quality and efficiency of pile foundation construction. In the traditional construction mode, the hoisting, positioning and lowering of the reinforcing cage usually rely on heavy equipment such as large crawler cranes or truck cranes, and the segmented molds required for splicing also need to be hoisted and spliced ​​with the help of such equipment.

[0003] Currently, in bridge pile foundation construction, heavy equipment such as large crawler cranes or truck cranes are mostly used to install and place the reinforcing cages. During this process, manual supervision is required throughout. The reinforcing cage is prone to deviation in posture during the lowering process, which can lead to collisions with the borehole wall, resulting in problems such as borehole wall collapse and reinforcing cage deformation. This affects the compactness of subsequent concrete pouring and reduces the bearing capacity of the pile foundation. When splicing piles, the splicing molds are mostly integral structures or segmented bolted connection structures. Integral molds are not convenient for transportation and hoisting. Although segmented bolted connection molds can be disassembled, they require manual high-altitude alignment during splicing. This not only carries high operational risks, but the bolted connection method also has defects such as poor joint sealing and low positioning accuracy. The spliced ​​mold is prone to grout leakage, resulting in poor concrete forming quality at the splicing point and affecting the integrity and durability of the pile foundation. Summary of the Invention

[0004] In order to overcome the shortcomings mentioned in the background art, the present invention provides a pile foundation auxiliary device for bridge construction and its construction method.

[0005] The technical solution is as follows: A pile foundation auxiliary device for bridge construction includes a trolley. A material inlet is located at the center of the trolley, and an outlet communicating with the material inlet is located on one side of the trolley. The trolley has circumferentially evenly distributed slids. A slider is slidably connected within each slid, and a support spring is fixedly connected between the slider and the slid. A mounting frame is fixedly connected to the top of the slider. A swing frame is connected to the mounting frame via a shaft. A torsion spring is sleeved on the outer side of the shaft, and both ends of the torsion spring are connected to the swing frame and the mounting frame, respectively. A symmetrically arranged... The trolley has distributed positioning wheels and a lifting component fixedly connected to the top. The upper end of the lifting component is equipped with a lifting assembly for moving and rotating the rebar cage. The lifting assembly includes a mounting plate, an electric winding wheel on the top of the mounting plate, a first pull rope fixedly connected to the electric winding wheel, a through hole on the mounting plate, the lower end of the first pull rope passing through the through hole and fixedly connected to a fixing plate, the fixing plate being located directly above the discharge port, and rope hooks evenly distributed in a circumferential direction fixedly connected to the bottom of the fixing plate. A shaping component for auxiliary forming of the pile foundation is provided inside the discharge port.

[0006] As an improvement to the above scheme, the lateral distance between the lower positioning wheel and the discharge port is smaller than the lateral distance between the upper positioning wheel and the discharge port.

[0007] As an improvement to the above solution, the lifting component also includes a mounting tube fixedly connected to the upper end of the lifting component. An electric hydraulic push rod is installed at the upper end of the lifting component inside the mounting tube. A moving rod is fixedly connected to the telescopic end of the electric hydraulic push rod. A ball bearing is fixedly connected to the moving rod. A symmetrically distributed track groove is opened in the upper part of the mounting tube. The ball bearing slides in the adjacent track groove. The upper end of the moving rod is fixedly connected to the mounting plate.

[0008] As an improvement to the above scheme, the track groove has a spiral structure, and the angle between the starting point and the ending point of the track groove is 90°-180°.

[0009] As an improvement to the above solution, the shaping component includes a lower mold, a middle mold, and an upper mold arranged sequentially from bottom to top. Arc-shaped blocks are fixedly connected to the upper part of the outer side walls of the lower mold, middle mold, and upper mold. Hook grooves that cooperate with rope hooks are opened on the arc-shaped blocks. Annular grooves are opened on the top of the lower mold and the middle mold. Arc-shaped grooves are circumferentially equidistantly distributed on both the lower mold and the middle mold, and the arc-shaped grooves are located below adjacent annular grooves. The upper and lower adjacent arc-shaped grooves and annular grooves are connected. First arc-shaped plates, circumferentially equidistantly distributed, are fixedly connected inside the annular grooves. Positioning blocks, circumferentially equidistantly distributed, are fixedly connected to the bottom of both the middle mold and the upper mold. Positioning grooves are opened on the positioning blocks. Second arc-shaped plates, circumferentially equidistantly distributed, are fixedly connected to the bottom of both the middle mold and the upper mold. Locking components are provided on both the lower mold and the middle mold.

[0010] As an improvement to the above scheme, the opposing sides of the first arc plate and the second arc plate are both inclined surfaces and the directions of their inclined surfaces are opposite. The first arc plate and the arc groove are staggered, and the second arc plate and the positioning block are staggered.

[0011] As an improvement to the above solution, the locking component includes fixed blocks embedded in the upper side of the lower mold and distributed circumferentially at equal intervals. The fixed blocks have movable grooves, and adjacent movable grooves are connected to arc-shaped grooves. Locking blocks that cooperate with adjacent locking grooves are slidably connected in the movable grooves. The ends of the locking blocks are located in the arc-shaped grooves and are connected to them. A return spring is fixedly connected between the locking blocks and the movable grooves. A fixed pulley is installed on the side wall of the fixed blocks. A rope hole is opened on the side wall of the fixed blocks. An annular pull plate is vertically limited and slidably connected to the outer side wall of the lower mold. A second pull rope is fixedly connected to the side wall of the locking blocks. The second pull rope passes through the adjacent rope hole and is fixedly connected to the annular pull plate.

[0012] As an improvement to the above solution, a lower disc is fitted on the outer side of the upper mold. A threaded rod with circumferentially equidistant distribution is fixedly connected to the bottom of the lower disc. An insert rod is threadedly connected to the threaded rod. An insertion hole for the insert rod is provided on the trolley. A limiting sliding groove with circumferentially equidistant distribution is provided on the lower disc. An upper disc is rotatably connected to the top of the lower disc. An arc-shaped guide groove with circumferentially equidistant distribution is provided on the upper disc. Sliding blocks are provided in the upper and lower adjacent limiting sliding grooves and arc-shaped guide grooves. A clamping block is fixedly connected to the top of the sliding block.

[0013] As an improvement to the above scheme, the contact surface between the lower disk and the upper disk is a friction surface.

[0014] A construction method for a pile foundation auxiliary device for bridge construction, using the aforementioned pile foundation auxiliary device for bridge construction, includes the following steps: S1: Move the trolley to the desired position so that the discharge port aligns with the hole on the ground. Lift the steel cage using the lifting assembly. The steel cage swings as it moves down and contacts the lower positioning wheel, which in turn compresses the torsion spring. The swing frame then drives the upper positioning wheel to contact and engage with the steel cage. The positioning wheel guides the steel cage downward through the discharge port and inserts it into the hole, thus completing the placement of the steel cage. S2: After the steel cage is placed, the rope hook is removed from the steel cage, and the electric winding wheel is started to wind up the first pull rope, so that the rope hook moves upward away from the steel cage, and the pile foundation is constructed by pouring concrete. S3: After the steel cage is poured, when it is necessary to continue the pile driving height, the lower mold, middle mold and upper mold are installed in sequence by lifting components, and the construction of the continued pile foundation is achieved by pouring concrete. S4: During steps S1-S3, adjust the height of the mounting plate using lifting components according to the height of the mold after installation.

[0015] The beneficial effects of this invention are: 1. This invention achieves the rotational displacement and precise resetting of the reinforcing cage through the cooperation of an electric hydraulic push rod, ball bearings, and track groove, ensuring that the reinforcing cage is accurately aligned with the hole. During the lowering process, the guiding mechanism composed of positioning wheels and torsion springs can automatically fit into the reinforcing cage, achieving full-process positioning and guidance, avoiding collision between the reinforcing cage and the hole wall, effectively preventing the hole wall from collapsing and the reinforcing cage from deforming, ensuring the density of subsequent concrete pouring, and improving the bearing capacity of the pile foundation.

[0016] 2. Utilizing the equipment's rotation, displacement, and lifting functions, the lower, middle, and upper molds can be quickly hoisted and aligned. Through the cooperation of the positioning block and the arc groove, and the first arc plate and the second arc plate, the mold can be automatically rotated and calibrated at a small angle, eliminating the need for manual high-altitude precise alignment. The reset spring drives the locking block and the locking groove to engage, enabling rapid mold fixing, replacing traditional bolt connections, improving splicing efficiency, and ensuring the sealing and integrity of the mold connection, reducing grout leakage during pile jointing, and guaranteeing the quality of pile joint forming.

[0017] 3. The entire process of lifting, moving, and splicing is completed by electric mechanisms such as electric hydraulic push rods and electric winding wheels, reducing manual high-altitude work and heavy equipment command and operation, and lowering safety risks such as falls from heights and equipment collisions; when disassembling the mold, the fixed parts are quickly released by the cooperation of the ring pull plate and the second pull rope, further improving the safety and convenience of the operation.

[0018] 4. By rotating the upper disc, each clamping block moves radially in a concentric manner, achieving precise concentric positioning of the upper disc and the upper mold. Combined with the fixing method of inserting the rod into the ground, the upper mold is limited in both directions of "radial clamping" and "axial fixing", effectively preventing the upper mold from deflecting or shifting during the pouring process due to the lack of support, ensuring the verticality and forming accuracy of the continued pile foundation, and guaranteeing the construction quality of the continued part. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the lifting component in this invention; Figure 3 This is a schematic diagram of the positioning wheel in this invention; Figure 4 This is a schematic diagram of the structure of the fixed disk in this invention; Figure 5 This is a cross-sectional view of the mounting tube in this invention; Figure 6 This is a schematic diagram of the structure of the mold in this invention; Figure 7 This is a schematic diagram of the arc-shaped block in this invention; Figure 8 This is a schematic diagram of the structure of the first arc-shaped plate in this invention; Figure 9 This is a three-dimensional cross-sectional view of the mold of the present invention; Figure 10 This is a schematic diagram of the structure of the fixing block in this invention; Figure 11 This is a cross-sectional view of the fixing block in this invention; Figure 12 This is a schematic diagram of the insert rod in this invention; Figure 13 This is a schematic diagram of the clamping block in this invention.

[0020] Component names and numbers in the diagram: 1. Trolley; 2. Slide rail; 3. Slider; 4. Support spring; 5. Mounting bracket; 6. Swing bracket; 7. Positioning wheel; 8. Lifting component; 9. Mounting tube; 10. Electro-hydraulic push rod; 11. Moving rod; 12. Ball bearing; 13. Track groove; 14. Mounting plate; 15. Electric winding wheel; 16. First pull rope; 17. Fixing disc; 18. Rope hook; 19. Lower mold; 20. Middle mold; 21. Upper mold; 22. Arc block; 23. 24. Hook groove; 25. Annular groove; 26. Arc groove; 27. First arc plate; 28. Positioning block; 29. ​​Locking groove; 30. Second arc plate; 31. Fixing block; 32. Moving groove; 33. Locking block; 34. Return spring; 35. Fixed pulley; 36. Annular pull plate; 37. Second pull rope; 38. Lower disc; 39. Threaded rod; 40. Insert rod; 41. Limiting sliding groove; 42. Upper disc; 43. Arc guide groove; 44. Sliding block; 45. Clamping block. Detailed Implementation

[0021] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments. Example 1

[0022] An auxiliary device for bridge construction pile foundations, such as Figures 1-13 As shown, the device includes a trolley 1 with a discharge port at its center and an outlet on its right side that communicates with the discharge port. The trolley 1 has three circumferentially equidistant grooves 2. Sliding blocks 3 are slidably connected within the grooves 2, and support springs 4 are fixedly connected between the sliding blocks 3 and the grooves 2. A mounting frame 5 is fixedly connected to the top of the sliding blocks 3. A swing frame 6 is connected to the mounting frame 5 via a shaft. A torsion spring is fitted on the outer side of the shaft on the mounting frame 5, with both ends connected to the swing frame 6 and the mounting frame 5, respectively. Two symmetrically arranged positioning wheels 7 are rotatably connected to the swing frame 6. The lateral distance between the lower positioning wheel 7 and the discharge port on the trolley 1 is smaller than the lateral distance between the upper positioning wheel 7 and the discharge port. A lifting component 8 (which can be an existing technology structure, such as a hydraulic cylinder or an electric lifting platform) is fixedly connected to the top of the trolley 1. The upper end of the lifting component 8 is equipped with a lifting assembly for moving and rotating the rebar cage. The lifting assembly includes a mounting plate 14. An electric winding wheel 15 is provided on the top of the mounting plate 14. A first pull rope 16 is fixedly connected to the electric winding wheel 15. A through hole is provided on the mounting plate 14. The lower end of the first pull rope 16 passes through the through hole on the mounting plate 14 and is fixedly connected to a fixing plate 17. The fixing plate 17 is located directly above the discharge port of the trolley 1. Four rope hooks 18 are fixedly connected to the bottom of the fixing plate 17 and are distributed circumferentially at equal intervals. A shaping assembly for auxiliary forming of the pile foundation is provided inside the discharge port of the trolley 1.

[0023] The lifting assembly also includes a mounting pipe 9 fixedly connected to the upper end of the lifting component 8. An electric hydraulic push rod 10 is installed on the upper end of the lifting component 8, located inside the mounting pipe 9. A moving rod 11 is fixedly connected to the telescopic end of the electric hydraulic push rod 10. Two symmetrically distributed ball bearings 12 are fixedly connected to the moving rod 11. Two symmetrically distributed track grooves 13 are opened in the upper part of the mounting pipe 9. The ball bearings 12 slide in the adjacent track grooves 13, and the track grooves 13 have a spiral structure. The angle between the starting point and the ending point of the track grooves 13 is 90°-180°. The upper end of the moving rod 11 is fixedly connected to the mounting plate 14. When the electric hydraulic push rod 10 works, it causes the moving rod 11 to move downward. During the downward movement of the moving rod 11, because the track grooves 13 have a spiral structure, the ball bearings 12 on them cooperate with the track grooves 13, causing the moving rod 11 to rotate synchronously. The rotation of the moving rod 11 drives the electric winding wheel 15 to rotate and move through the mounting plate 14, so that the electric winding wheel 15 rotates to directly above the steel cage, which facilitates the lifting of the steel cage.

[0024] The shaping assembly includes a lower mold 19, a middle mold 20, and an upper mold 21 arranged sequentially from bottom to top. Arc-shaped blocks 22 are fixedly connected to the upper part of the outer side walls of the lower mold 19, middle mold 20, and upper mold 21. The arc-shaped blocks 22 have hook grooves 23 that mate with rope hooks 18. Annular grooves 24 are formed on the top of both the lower mold 19 and middle mold 20. Four circumferentially equidistant arc-shaped grooves 25 are formed on both the lower mold 19 and middle mold 20. The arc-shaped grooves 25 are located below adjacent annular grooves 24 and are connected to each other. The upper and lower adjacent arc-shaped grooves 25 and annular grooves 24 are connected. Four circumferentially equidistant first arc-shaped plates 26 are fixedly connected within the annular grooves 24. The middle mold 20 and upper mold 21... The bottom of mold 1 is fixedly connected to four circumferentially equidistant positioning blocks 27, and the positioning blocks 27 are provided with locking grooves 28. The bottom of the middle mold 20 and the upper mold 21 are fixedly connected to four circumferentially equidistant second arc-shaped plates 29. The opposing sides of the first arc-shaped plate 26 and the second arc-shaped plate 29 are both inclined surfaces and the directions of their inclined surfaces are opposite. The first arc-shaped plate 26 and the arc-shaped groove 25 are staggered, and the second arc-shaped plate 29 and the positioning blocks 27 are staggered. The lower mold 19 and the middle mold 20 are provided with locking components. Through the cooperation of the first arc-shaped plate 26 and the second arc-shaped plate 29, the middle mold 20 can rotate by itself at a small angle, so that the positioning blocks 27 can be inserted into the arc-shaped groove 25 after rotating at a certain angle.

[0025] The locking component includes four fixed blocks 30 embedded in the upper side of the lower mold 19 and equidistantly distributed in a circumferential direction. The fixed blocks 30 have movable grooves 31. Adjacent movable grooves 31 are connected to arc-shaped grooves 25. Locking blocks 32 that cooperate with adjacent locking grooves 28 are slidably connected in the movable grooves 31. The ends of the locking blocks 32 are located in the arc-shaped grooves 25. A return spring 33 is fixedly connected between the locking blocks 32 and the movable grooves 31. Fixed pulleys 34 are installed on the side walls of the fixed blocks 30. Rope holes are opened on the side walls of the fixed blocks 30. A ring pull plate 35 is vertically limited and slidably connected to the outer side wall of the lower mold 19. A second pull rope 36 is fixedly connected to the side wall of the locking blocks 32. The second pull rope 36 passes through the rope hole on the fixed blocks 30 and is fixedly connected to the ring pull plate 35. The ring pull plate 35 moves downward and the second pull rope 36 moves the locking blocks 32 out of the locking grooves 28, releasing the fixation of the positioning blocks 27.

[0026] In use, the operator moves the trolley 1 to the desired position, aligning the discharge port on the trolley 1 with the center of the hole in the ground. Then, the operator activates the electric hydraulic push rod 10 to move the moving rod 11 downwards. During this downward movement, the ball bearings 12 on the spiral track 13 engage with the track 13, causing the moving rod 11 to rotate synchronously. This rotation of the moving rod 11 drives the electric winding wheel 15 to rotate and move via the mounting plate 14. Once the electric winding wheel 15 is directly above the rebar cage, the operator closes the electric hydraulic push rod 10. The electric winding reel 15 is activated, releasing the first pull rope 16. The fixed disc 17 then moves downwards. After the worker hooks the rope hook 18 onto the rebar cage, the electric winding reel 15 is activated again to wind up the first pull rope 16, causing the fixed disc 17 to move upwards. The upward movement of the fixed disc 17, through the rope hook 18, moves the rebar cage upwards. Once the rebar cage reaches the appropriate position, the worker closes the electric winding reel 15 and activates the electric hydraulic push rod 10. The electric hydraulic push rod 10 causes the moving rod 11 to move upwards, through the cooperation of the ball bearings 12 and the track groove 13. Rotate the moving rod 11 to reset, moving the rebar cage directly above the hole in the ground. At this time, the worker closes the electric hydraulic push rod 10 and starts the electric winding wheel 15 to release the first pull rope 16, allowing the rebar cage to pass downward through the feeding port on the trolley 1 and insert into the hole in the ground, completing the placement of the rebar cage. During the downward movement of the rebar cage, it will first contact the lower positioning wheel 7. As the rebar cage continues to move downward, it compresses the lower positioning wheel 7, causing it to swing downward. The torsion spring is compressed accordingly, and the downward swing of the lower positioning wheel 7 is synchronized with the upper positioning wheel 7 via the swing frame 6. The oscillation causes the upper positioning wheel 7 to contact and engage with the reinforcing cage. The positioning wheel 7 guides the reinforcing cage (and the diameter of the positioning wheel 7 is larger than the distance between adjacent vertically arranged rings on the reinforcing cage), preventing the reinforcing cage from colliding with the inner wall of the hole during downward movement, which could cause the hole wall to collapse or the reinforcing cage to deform, affecting the compactness of the subsequent concrete pouring. Then, the workers remove the rope hook 18 from the reinforcing cage and start the electric winding wheel 15 to wind up the first pull rope 16, causing the rope hook 18 to move upward away from the reinforcing cage, and the pile foundation construction is completed by pouring concrete.

[0027] After the reinforcement cage is poured, when it is necessary to continue the piling height, the worker starts the electric hydraulic push rod 10 to move the moving rod 11 downwards. When the fixed plate 17 rotates and moves to directly above the lower mold 19, the electric hydraulic push rod 10 is closed and the electric winding wheel 15 is started to release the first pull rope 16, causing the rope hook 18 to move downwards and hook into the hook groove 23. Then, the worker starts the electric winding wheel 15 to wind up the first pull rope 16, causing the lower mold 19 to move upwards to the appropriate position. After that, the worker closes the electric winding wheel 15 and starts the electric hydraulic push rod 10 to drive the moving rod 11 upwards, causing the lower mold 19 to rotate to the required construction position. At this point, the operator closes the electric hydraulic push rod 10 and starts the electric winding wheel 15 to release the first pull rope 16, causing the lower mold 19 to pass downwards through the discharge port on the trolley 1 and insert into the ground outside the hole (at this time, the bottom end of the lower mold 19 is above the ground). The above operation is then repeated to lift and install the middle mold 20 and the upper mold 21. When the middle mold 20 rotates to directly above the lower mold 19, the electric winding wheel 15 is started to release the first pull rope 16, causing the middle mold 20 to move downwards so that its positioning block 27 and the second arc-shaped plate 29 insert into the arc-shaped groove 25 and the annular groove 24 on the lower mold 19. When the positioning block 27 is not in contact with the arc-shaped groove 25, the lower mold 20 moves downwards. When the upper and lower slots 25 are engaged, the first arc plate 26 and the second arc plate 29 cooperate to achieve a small-angle rotation of the middle mold 20, causing the positioning block 27 to rotate a certain angle and insert into the arc slot 25. During this process, the positioning block 27 will press the locking block 32 on its lower side, and the return spring 33 will be compressed accordingly. When the locking groove 28 on the positioning block 27 coincides with the locking block 32, the locking block 32 will be locked into the locking groove 28 under the action of the return spring 33, completing the fixed installation between the middle mold 20 and the lower mold 19. Then, the above operation is repeated to complete the installation of the upper mold 21 and the middle mold 20. During the above operation, the operator can install the mold according to the mold installation instructions. After the height is adjusted, the height of the mounting plate 14 is adjusted using the lifting component 8 to avoid obstructing the placement of the reinforcing cage into the mold. After the continuation of piling is completed, the trolley 1 is moved to the left away from the pile foundation after piling. When the mold needs to be disassembled, the staff moves the trolley 1 to a suitable position, and then moves the annular pull plate 35 downwards to move the locking block 32 out of the locking groove 28 through the second pull rope 36, releasing the fixation of the positioning block 27. Then, the mold is lifted upwards in sequence by the electric hydraulic push rod 10 and the electric winding wheel 15 to achieve mold demolding. After the mold is removed, the staff moves the trolley 1 away from the pile foundation after piling. Example 2

[0028] Based on Example 1, such as Figure 12 and Figure 13As shown, a lower disc 37 is fitted onto the outer side of the upper mold 21. Four threaded rods 38, equidistant from each other in the circumferential direction, are fixedly connected to the bottom of the lower disc 37. Insert rods 39 are installed on the threaded rods 38 via threaded connections. The trolley 1 has insertion holes that mate with the insert rods 39. Four equidistant limiting sliding grooves 40 are provided on the lower disc 37. An upper disc 41 is rotatably connected to the top of the lower disc 37. The contact surface between the lower disc 37 and the upper disc 41 is a friction surface. Without external force... The upper disc 41 cannot rotate on its own. The upper disc 41 has four arc-shaped guide grooves 42 that are circumferentially distributed at equal intervals. The upper and lower adjacent limiting sliding grooves 40 and the arc-shaped guide grooves 42 are equipped with sliding blocks 43. The top of the sliding block 43 is fixedly connected to a clamping block 44. When the upper disc 41 is rotated, the sliding block 43 drives the clamping block 44 on it to move closer to the upper mold 21 through the cooperation of the arc-shaped guide grooves 42 and the limiting sliding grooves 40, so that the upper disc 41 and the upper mold 21 are concentrically positioned.

[0029] After the upper mold 21 is installed on the continued pile foundation, the workers place the lower disc 37 and the upper disc 41 on the outside of the upper mold 21. The workers rotate the upper disc 41, and through the cooperation of the arc-shaped guide groove 42 and the limiting sliding groove 40, the sliding block 43 drives the clamping block 44 on it to move closer to the upper mold 21, so that the upper disc 41 is concentrically positioned with the upper mold 21. Because the contact surface between the lower disc 37 and the upper disc 41 is a friction surface, the upper disc 41 cannot rotate on its own without the action of external force. Then the workers thread the insertion rod 39 and the threaded rod 38 together. Press down on the upper disc 41 to insert the rod 39 through the insertion hole into the ground. The upper mold 21 is clamped and fixed by the cooperation of the clamping block 44 and the rod 39, thus positioning the upper mold 21 and preventing it from deflecting due to lack of support during the pouring process, which would affect the quality of the continued pile foundation. After the continued pile foundation construction is completed, the workers move the lower disc 37 upward to remove the rod 39 from the ground. Then, the rod 39 is removed from the threaded rod 38 and the upper disc 41 is rotated in the opposite direction to move the clamping block 44 away from the upper mold 21. Example 3

[0030] Based on Example 2, such as Figures 1-13 The construction method of a bridge construction pile foundation auxiliary device shown herein, using the aforementioned bridge construction pile foundation auxiliary device, includes the following steps: S1: Move the trolley 1 to the required position and align the discharge port on the trolley 1 with the hole on the ground. Lift the steel cage using the lifting assembly. The steel cage moves down and contacts the lower positioning wheel 7, causing it to swing. The torsion spring is then compressed, and the swing frame 6 drives the upper positioning wheel 7 to contact and engage with the steel cage. The positioning wheel 7 positions and guides the steel cage, allowing it to pass down through the discharge port and into the hole, thus completing the placement of the steel cage. S2: After the steel cage is placed, the rope hook 18 is removed from the steel cage, and the electric winding wheel 15 is started to wind up the first pulling rope 16, so that the rope hook 18 moves upward away from the steel cage, and the pile foundation is constructed by pouring concrete. S3: After the steel cage is poured, when it is necessary to continue the pile driving height, the lower mold 19, the middle mold 20 and the upper mold 21 are installed in sequence by lifting components, and the construction of the continued pile foundation is achieved by pouring concrete. S4: During steps S1-S3, adjust the height of the mounting plate 14 using the lifting component 8 according to the height of the mold after installation.

[0031] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. 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. A pile foundation auxiliary device for bridge construction, characterized by, The device includes a trolley (1), with a discharge port at its center and an outlet connected to the discharge port on one side. The trolley (1) has circumferentially equidistant grooves (2), with a slider (3) slidably connected within each groove (2). A support spring (4) is fixedly connected between the slider (3) and the groove (2). A mounting bracket (5) is fixedly connected to the top of the slider (3). A swing frame (6) is connected to the mounting bracket (5) via a shaft. A torsion spring is sleeved on the outer side of the shaft, with both ends of the torsion spring connected to the swing frame (6) and the mounting bracket (5) respectively. A symmetrically distributed positioning wheel (7) is rotatably connected to the swing frame (6). (1) is fixedly connected to the top of a lifting component (8). The upper end of the lifting component (8) is equipped with a lifting assembly for moving and rotating the steel cage. The lifting assembly includes a mounting plate (14). An electric winding wheel (15) is provided on the top of the mounting plate (14). A first pull rope (16) is fixedly connected to the electric winding wheel (15). A through hole is provided on the mounting plate (14). The lower end of the first pull rope (16) passes through the through hole and is fixedly connected to a fixed plate (17). The fixed plate (17) is located directly above the discharge port. Rope hooks (18) are fixedly connected to the bottom of the fixed plate (17) in a circumferentially equidistant manner. A shaping assembly for auxiliary forming of the pile foundation is provided inside the discharge port. The shaping assembly includes a lower mold (19), a middle mold (20), and an upper mold (21) arranged sequentially from bottom to top. Arc-shaped blocks (22) are fixedly connected to the upper part of the outer side walls of the lower mold (19), middle mold (20), and upper mold (21). Hook grooves (23) that cooperate with rope hooks (18) are provided on the arc-shaped blocks (22). Annular grooves (24) are provided on the top of both the lower mold (19) and the middle mold (20). Arc-shaped grooves (25) are provided on both the lower mold (19) and the middle mold (20) and are circumferentially equidistantly distributed in a circular pattern. The arc-shaped grooves (25) are located adjacent to each other. On the lower side of the annular groove (24), the upper and lower adjacent arc grooves (25) are connected to the annular groove (24). The annular groove (24) is fixedly connected with a first arc plate (26) that is equidistantly distributed in the circumferential direction. The bottom of the middle mold (20) and the upper mold (21) are fixedly connected with positioning blocks (27) that are equidistantly distributed in the circumferential direction. The positioning blocks (27) are provided with slots (28). The bottom of the middle mold (20) and the upper mold (21) are fixedly connected with a second arc plate (29) that is equidistantly distributed in the circumferential direction. The lower mold (19) and the middle mold (20) are provided with slotting parts. The opposing sides of the first arc plate (26) and the second arc plate (29) are both inclined surfaces and the directions of their inclined surfaces are opposite. The first arc plate (26) and the arc groove (25) are staggered, and the second arc plate (29) and the positioning block (27) are staggered. The locking component includes a fixed block (30) embedded in the upper side of the lower mold (19) and distributed circumferentially. The fixed block (30) has a moving groove (31). The adjacent moving groove (31) is connected to the arc groove (25). The moving groove (31) is slidably connected to a locking block (32) that cooperates with the adjacent locking groove (28). The end of the locking block (32) is located in the arc groove (25) and the two are connected. A return spring (33) is fixedly connected between the locking block (32) and the moving groove (31). A fixed pulley (34) is installed on the side wall of the fixed block (30). The side wall of the fixed block (30) has a rope hole. The outer side wall of the lower mold (19) is vertically limited and slidably connected to an annular pull plate (35). The side wall of the locking block (32) is fixedly connected to a second pull rope (36). The second pull rope (36) passes through the adjacent rope hole and is fixedly connected to the annular pull plate (35).

2. A pile foundation auxiliary device for bridge construction according to claim 1, characterized in that, The lateral distance between the lower positioning wheel (7) and the discharge port is smaller than the lateral distance between the upper positioning wheel (7) and the discharge port.

3. The auxiliary device for bridge construction pile foundation as described in claim 2, characterized in that, The lifting assembly also includes a mounting tube (9) fixedly connected to the upper end of the lifting component (8). An electric hydraulic push rod (10) located inside the mounting tube (9) is installed at the upper end of the lifting component (8). A moving rod (11) is fixedly connected to the telescopic end of the electric hydraulic push rod (10). A ball bearing (12) is fixedly connected to the moving rod (11). A symmetrically distributed track groove (13) is opened in the upper part of the mounting tube (9). The ball bearing (12) slides in the adjacent track groove (13). The upper end of the moving rod (11) is fixedly connected to the mounting plate (14).

4. The auxiliary device for bridge construction pile foundation as described in claim 3, characterized in that, The track groove (13) has a spiral structure, and the angle between the starting point and the ending point of the track groove (13) is 90°-180°.

5. The auxiliary device for bridge construction pile foundation as described in claim 4, characterized in that, The upper mold (21) is fitted with a lower disc (37) on its outer side. The bottom of the lower disc (37) is fixedly connected with threaded rods (38) that are circumferentially equidistant. A plug rod (39) is threadedly connected to the threaded rod (38). The trolley (1) is provided with a plug hole that mates with the plug rod (39). The lower disc (37) is provided with circumferentially equidistant sliding grooves (40). The top of the lower disc (37) is rotatably connected to an upper disc (41). The upper disc (41) is provided with circumferentially equidistant arc-shaped guide grooves (42). Sliding blocks (43) are provided in the adjacent upper and lower equidistant sliding grooves (40) and arc-shaped guide grooves (42). A clamping block (44) is fixedly connected to the top of the sliding block (43).

6. The auxiliary device for bridge construction pile foundation as described in claim 5, characterized in that, The contact surface between the lower disk (37) and the upper disk (41) is the friction surface.

7. A construction method for a pile foundation auxiliary device for bridge construction, employing the pile foundation auxiliary device for bridge construction as described in claim 6, characterized in that... Includes the following steps: S1: Move the trolley (1) to the position where it is needed, so that the discharge port coincides with the hole on the ground. The lifting component is used to lift the steel cage. The steel cage moves down and contacts the positioning wheel (7) on the lower side to swing. The torsion spring is compressed accordingly. The swing frame (6) drives the positioning wheel (7) on the upper side to contact and cooperate with the steel cage. The positioning wheel (7) positions and guides the steel cage, so that the steel cage goes down through the discharge port and is inserted into the hole, thus completing the placement of the steel cage. S2: After the steel cage is placed, the rope hook (18) is removed from the steel cage, and the electric winding wheel (15) is started to wind up the first pull rope (16), so that the rope hook (18) moves upward away from the steel cage, and the pile foundation is constructed by pouring concrete. S3: After the steel cage is poured, when it is necessary to continue the pile driving height, the lower mold (19), middle mold (20) and upper mold (21) are installed in sequence by lifting components, and the construction of the continued pile foundation is achieved by pouring concrete. S4: During steps S1-S3, adjust the height of the mounting plate (14) using the lifting component (8) according to the height of the mold after installation.

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