Pile foundation auxiliary device for bridge construction and construction method thereof

Abstract

The invention relates to the technical field of bridge construction, in particular to a pile foundation auxiliary device for bridge construction and a construction method thereof.The device comprises a cart, a discharging opening is formed in the center of the cart, an outlet communicating with the discharging opening is formed in one side of the cart, and sliding grooves distributed at equal intervals in the circumferential direction are formed in the cart; a sliding block is slidably connected into the sliding groove, a supporting spring is fixedly connected between the sliding block and the sliding groove, and a mounting frame is fixedly connected to the top of the sliding block. Through cooperation of the electric hydraulic push rods, the balls and the rail grooves, rotary displacement and precise reset of the reinforcement cage are achieved, and it is ensured that the reinforcement cage is accurately aligned with holes; in the lowering process, a guide mechanism composed of the positioning wheel and the torsional spring can be automatically attached to the reinforcement cage, whole-process positioning and guiding are achieved, the reinforcement cage is prevented from colliding with the hole wall, hole wall collapse and reinforcement cage deformation are effectively prevented, the compactness of subsequent concrete pouring is guaranteed, and the pile foundation bearing capacity is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of bridge construction technology, and particularly relates to a pile foundation auxiliary device for bridge construction and a construction method thereof. BACKGROUND

[0002] In the construction of bridge bored piles, the lowering of the reinforcement cage and the hoisting of the splicing mold are key procedures to guarantee the quality and efficiency of pile foundation construction. In the traditional construction mode, the lifting, positioning and lowering of the reinforcement cage usually rely on heavy equipment such as large crawler cranes or automobile cranes, and the splicing mold required for splicing also needs to be hoisted and spliced by such equipment.

[0003] At present, large crawler cranes or automobile cranes are often used to install and place the reinforcement cage during the construction of bridge pile foundations. In this process, manual command is required throughout the whole process, and the reinforcement cage is prone to pose deviation during the lowering process, which may cause collision with the borehole wall, thereby causing problems such as borehole wall collapse and reinforcement cage deformation, affecting the compactness of subsequent concrete pouring, reducing the bearing capacity of the pile foundation, and when splicing, the splicing mold is usually of an integral structure or a segmented bolt connection structure. The integral mold is not convenient for transportation and hoisting, and although the segmented bolt connection mold can be disassembled, manual high-altitude alignment is required during splicing, which not only has high operation risk, but also has the defects of poor joint sealing and low positioning accuracy in the bolt fastening connection mode. The spliced mold is prone to slurry leakage, which leads to poor concrete forming quality at the splicing position, affecting the integrity and durability of the pile foundation. SUMMARY

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

[0005] The technical scheme is as follows: a pile foundation auxiliary device for bridge construction, comprising a cart, a discharge port is formed in the center position of the cart, an outlet is formed in one side of the cart and communicates with the discharge port, a plurality of slide grooves are formed on the cart in a circumferential equidistant distribution, a slide block is slidably connected in the slide groove, a supporting spring is fixedly connected between the slide block and the slide groove, a mounting bracket is fixedly connected to the top of the slide block, a swing bracket is connected to the mounting bracket through a shaft rod, a torsional spring is sleeved outside the shaft rod, the two ends of the torsional spring are connected with the swing bracket and the mounting bracket respectively, a plurality of positioning wheels are rotatably connected to the swing bracket in a symmetrical distribution, a lifting piece is fixedly connected to the top of the cart, a lifting assembly for moving and rotating the reinforcement cage is installed on the upper end of the lifting piece, the lifting assembly comprises a mounting plate, an electric winding wheel is arranged on the top of the mounting plate, a first pull rope is fixedly connected to the electric winding wheel, a through hole is formed in the mounting plate, the lower end of the first pull rope passes through the through hole and is fixedly connected with a fixed disc, the fixed disc is located directly above the discharge port, a plurality of rope hooks are fixedly connected to the bottom of the fixed disc in a circumferential equidistant distribution, and a shaping assembly for auxiliary shaping of the pile foundation is arranged in the discharge port.

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

[0007] As an improvement of the above scheme, the lifting assembly further comprises a mounting pipe fixedly connected to the upper end of the lifting piece, an electric hydraulic push rod is arranged inside the mounting pipe and fixedly connected to the upper end of the lifting piece, a moving rod is fixedly connected to the extension end of the electric hydraulic push rod, a plurality of symmetrically distributed rolling balls are fixedly connected to the moving rod, a plurality of symmetrically distributed track grooves are formed in the upper portion of the mounting pipe, the rolling balls are slidably arranged in the adjacent track grooves, and the upper end of the moving rod is fixedly connected to the mounting plate.

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

[0009] As an improvement of the above scheme, the shaping assembly comprises a lower mold, a middle mold and an upper mold arranged in sequence from bottom to top, arc-shaped blocks are fixedly connected to the upper portions of the outer side walls of the lower mold, the middle mold and the upper mold, hook grooves matched with the rope hooks are formed in the arc-shaped blocks, annular grooves are formed in the top portions of the lower mold and the middle mold, arc-shaped grooves are formed in the lower mold and the middle mold in a circumferentially equidistant manner, the arc-shaped grooves are located below the adjacent annular grooves, the adjacent arc-shaped grooves and annular grooves are connected, a plurality of first arc-shaped plates are fixedly connected to the annular grooves in a circumferentially equidistant manner, positioning blocks are fixedly connected to the bottom portions of the middle mold and the upper mold in a circumferentially equidistant manner, clamping grooves are formed in the positioning blocks, a plurality of second arc-shaped plates are fixedly connected to the bottom portions of the middle mold and the upper mold in a circumferentially equidistant manner, and clamping pieces are arranged on the lower mold and the middle mold.

[0010] As an improvement of the above scheme, the opposite sides of the first arc-shaped plates and the second arc-shaped plates are inclined surfaces, and the directions of the inclined surfaces of the first arc-shaped plates and the second arc-shaped plates are opposite, the first arc-shaped plates and the arc-shaped grooves are staggered, and the second arc-shaped plates and the positioning blocks are staggered.

[0011] As an improvement of the above scheme, the clamping piece comprises fixed blocks embedded on the upper side of the lower mold and arranged in a circumferentially equidistant manner, moving grooves are formed in the fixed blocks, the adjacent moving grooves are connected to the arc-shaped grooves, clamping blocks matched with the adjacent clamping grooves are slidably connected in the moving grooves, the end portions of the clamping blocks are located in the arc-shaped grooves and connected to the arc-shaped grooves, return springs are fixedly connected between the clamping blocks and the moving grooves, a fixed pulley is arranged on the side wall of the fixed block, rope holes are formed in the side wall of the fixed block, an annular pull plate is vertically and limitingly slidably connected to the outer side wall of the lower mold, a second pull rope is fixedly connected to the side wall of the clamping block, and the second pull rope penetrates through the adjacent rope holes and is fixedly connected to the annular pull plate.

[0012] As the improvement of the above scheme, the outer side of the upper mold is sleeved with a lower disc, the bottom of the lower disc is fixedly connected with thread rods distributed equidistantly in the circumferential direction, the thread rods are threadedly connected with inserting rods, the trolley is provided with inserting holes matched with the inserting rods, the lower disc is provided with limiting sliding grooves distributed equidistantly in the circumferential direction, the top of the lower disc is rotatably connected with an upper disc, the upper disc is provided with arc-shaped guide grooves distributed equidistantly in the circumferential direction, and sliding blocks are arranged in the limiting sliding grooves and the arc-shaped guide grooves in alternation.

[0013] As the improvement of the above scheme, the contact surface of the lower disc and the upper disc is a friction surface.

[0014] A construction method of a pile foundation auxiliary device for bridge construction, which adopts the pile foundation auxiliary device for bridge construction, comprises the following steps: S1: The trolley is moved to a position where it is needed, the discharge opening is overlapped with the hole on the ground, the lifting assembly is used to hoist the reinforcement cage, the positioning wheel on the lower side is contacted and extruded by the downward movement of the reinforcement cage to swing, the torsional spring is compressed, the positioning wheel on the upper side is contacted and matched with the reinforcement cage by the swinging of the swinging frame, the reinforcement cage is positioned and guided by the positioning wheel, and the reinforcement cage is inserted into the hole through the discharge opening, so that the placement of the reinforcement cage is completed; S2: After the placement of the reinforcement cage is completed, the rope hook is removed from the reinforcement cage, the first pull rope is wound by the electric winding wheel, the rope hook is moved upward away from the reinforcement cage, and the construction of the pile foundation is realized by pouring concrete; S3: After the pouring of the reinforcement cage is completed, the pile height needs to be connected, the lower mold, the middle mold and the upper mold are sequentially installed by the lifting assembly, and the construction of the connected pile foundation is realized by pouring concrete; S4: During the steps S1-S3, the height of the installation plate is adjusted by the lifting piece according to the height of the installed mold.

[0015] The beneficial effects of the present application are: 1、The present application realizes the rotation displacement and accurate reset of the reinforcement cage by the cooperation of the electric hydraulic push rod, the ball and the track groove, ensures the accurate alignment of the reinforcement cage with the hole, realizes the whole positioning and guiding by the automatic adhesion of the positioning wheel and the torsional spring during the lowering process, avoids the collision between the reinforcement cage and the hole wall, effectively prevents the collapse of the hole wall and the deformation of the reinforcement cage, guarantees the compactness of the subsequent concrete pouring, and improves the pile foundation bearing capacity.

[0016] 2. With the rotation displacement and lifting function of the device, the hoisting and positioning of the lower mold, the middle mold and the upper mold are quickly completed; through the cooperation of the positioning block and the arc-shaped groove, the first arc-shaped plate and the second arc-shaped plate, the self-rotation and small-angle rotation calibration of the mold is realized, without manual high-precision positioning; the reset spring drives the clamping structure of the clamping block and the clamping groove, realizes the quick fixing of the mold, replaces the traditional bolt connection, improves the splicing efficiency, ensures the sealing and integrity of the mold connection, reduces the problem of pile leakage, and guarantees the pile forming quality.

[0017] 3. The lifting, displacement and splicing operations are completed by electric mechanisms such as electric hydraulic push rods and electric wire winding wheels throughout the process, reducing manual high-altitude operation and heavy equipment command operation, reducing safety risks such as high-altitude falling and equipment collision; when the mold is disassembled, the fixing is quickly released through the cooperation of the annular pull plate and the second pull rope, further improving the operation safety and convenience.

[0018] 4. By rotating the upper disc, each clamping block is driven to move inwards along the radial direction, realizing the concentric and accurate positioning of the upper disc and the upper mold, and cooperating with the insertion of the insertion rod into the ground to fix it, limiting the upper mold from both "radial clamping" and "axial fixing", effectively avoiding the deflection and displacement of the upper mold during pouring due to lack of support, ensuring the perpendicularity and forming precision of the pile foundation, and guaranteeing the construction quality of the continuation part. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of the whole of the application; Figure 2 It is a structural schematic diagram of the lifting member in the application; Figure 3 It is a structural schematic diagram of the positioning wheel in the application; Figure 4 It is a structural schematic diagram of the fixed disc in the application; Figure 5 It is a sectional structural schematic diagram of the mounting pipe in the application; Figure 6 It is a structural schematic diagram of the middle mold in the application; Figure 7 It is a structural schematic diagram of the arc-shaped block in the application; Figure 8 It is a structural schematic diagram of the first arc-shaped plate in the application; Figure 9 It is a sectional structural schematic diagram of the middle mold in the application; Figure 10 It is a structural schematic diagram of the fixed block in the application; Figure 11 It is a sectional structural schematic diagram of the fixed block in the application; Figure 12 It is a structural schematic diagram of the insertion rod in the application; 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] A pile foundation auxiliary device for bridge construction, 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 utility model relates to a steel bar cage auxiliary forming device, including a cart (1), the central position of cart (1) is opened with the discharge port, and the side of cart (1) is opened with the outlet of communication with the discharge port, and the cart (1) is opened with the slide groove (2) of the equidistance distribution in circumference, the slide groove (2) is slidably connected with the sliding block (3), and the sliding block (3) is fixedly connected with the support spring (4) between the slide groove (2), the top of sliding block (3) is fixedly connected with the mounting bracket (5), and the mounting bracket (5) is connected with the swing frame (6) through the shaft rod, and the outer side of shaft rod is equipped with the torsional spring, and the both ends of torsional spring are connected with swing frame (6) and mounting bracket (5) respectively, and the swing frame (6) is rotatably connected with the positioning wheel (7) of symmetrical distribution, and the top of cart (1) is fixedly connected with the lifting piece (8), and the upper end of lifting piece (8) is installed the lifting assembly for the rotation of steel bar cage movement, and the lifting assembly includes the mounting plate (14), and the top of mounting plate (14) is provided with the electric winding wheel (15), and the electric winding wheel (15) is fixedly connected with the first pull rope (16), and the upper end of first pull rope (16) is fixedly connected with the fixed disc (17) through the through hole, and the fixed disc (17) is located the just above of discharge port, and the bottom of fixed disc (17) is fixedly connected with the rope hook (18) of equidistance distribution in circumference, and the discharge port is equipped with the shape forming assembly for the auxiliary forming of pile foundation.

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

3. A pile foundation auxiliary device for bridge construction according to claim 2, characterized in that, The lifting assembly further includes a mounting tube (9) fixedly connected to the upper end of the lifting piece (8), an electric hydraulic push rod (10) mounted on the upper end of the lifting piece (8) inside the mounting tube (9), a moving rod (11) fixedly connected to the electric hydraulic push rod (10) at the extension end, symmetrically distributed balls (12) fixedly connected to the moving rod (11), symmetrically distributed track grooves (13) formed in the upper portion of the mounting tube (9), the balls (12) slidably located in the adjacent track grooves (13), and the upper end of the moving rod (11) fixedly connected to the mounting plate (14).

4. A pile foundation auxiliary device for bridge construction according to claim 3, characterized in that, The track grooves (13) have a spiral structure, and the included angle between the starting point and the ending point of the track grooves (13) is 90°-180°.

5. A pile foundation auxiliary device for bridge construction according to claim 4, characterized in that, The shaping assembly comprises a lower mold (19), a middle mold (20) and an upper mold (21) arranged in sequence from bottom to top, and the outer side walls of the lower mold (19), the middle mold (20) and the upper mold (21) are all fixedly connected with arc-shaped blocks (22) at the upper portions, the arc-shaped blocks (22) are provided with hook grooves (23) matched with the rope hooks (18), the top portions of the lower mold (19) and the middle mold (20) are both provided with annular grooves (24), the lower mold (19) and the middle mold (20) are both provided with arc-shaped grooves (25) distributed in a circumferential equidistant manner, and the arc-shaped grooves (25) are located at the lower sides of the adjacent annular grooves (24), the adjacent arc-shaped grooves (25) and the annular grooves (24) are communicated, the annular grooves (24) are fixedly connected with first arc-shaped plates (26) distributed in a circumferential equidistant manner, the bottom portions of the middle mold (20) and the upper mold (21) are both fixedly connected with positioning blocks (27) distributed in a circumferential equidistant manner, the positioning blocks (27) are provided with clamping grooves (28), the bottom portions of the middle mold (20) and the upper mold (21) are both fixedly connected with second arc-shaped plates (29) distributed in a circumferential equidistant manner, and the lower mold (19) and the middle mold (20) are both provided with clamping members.

6. A pile foundation assisting device for bridge construction according to claim 5, characterized in that, The opposite sides of the first arc-shaped plates (26) and the second arc-shaped plates (29) are both inclined surfaces, and the directions of the inclined surfaces of the first arc-shaped plates (26) and the second arc-shaped plates (29) are opposite, the first arc-shaped plates (26) and the arc-shaped grooves (25) are distributed in a staggered manner, and the second arc-shaped plates (29) and the positioning blocks (27) are distributed in a staggered manner.

7. A pile foundation assisting device for bridge construction according to claim 6, characterized in that, The clamping member comprises fixed blocks (30) embedded on the upper side of the lower mold (19) and distributed in a circumferential equidistant manner, the fixed blocks (30) are provided with moving grooves (31), the adjacent moving grooves (31) are communicated with the arc-shaped grooves (25), the moving grooves (31) are slidably connected with clamping blocks (32) matched with the adjacent clamping grooves (28), the end portions of the clamping blocks (32) are located in the arc-shaped grooves (25) and communicated with the arc-shaped grooves (25), the clamping blocks (32) and the moving grooves (31) are fixedly connected with return springs (33), the side walls of the fixed blocks (30) are provided with fixed pulleys (34), the side walls of the fixed blocks (30) are provided with rope holes, the outer side walls of the lower mold (19) are vertically limitedly and slidably connected with annular pull plates (35), the side walls of the clamping blocks (32) are fixedly connected with second pull ropes (36), and the second pull ropes (36) are fixedly connected with the annular pull plates (35) through the adjacent rope holes.

8. A pile foundation assisting device for bridge construction according to claim 7, characterized in that, The outer side of the upper mold (21) is sleeved with a lower disc (37), the bottom portion of the lower disc (37) is fixedly connected with threaded rods (38) distributed in a circumferential equidistant manner, the threaded rods (38) are threadedly connected with inserting rods (39), the trolley (1) is provided with inserting holes matched with the inserting rods (39), the lower disc (37) is provided with limiting sliding grooves (40) distributed in a circumferential equidistant manner, the top portion of the lower disc (37) is rotatably connected with an upper disc (41), the upper disc (41) is provided with arc-shaped guide grooves (42) distributed in a circumferential equidistant manner, and the adjacent limiting sliding grooves (40) and the arc-shaped guide grooves (42) are provided with sliding blocks (43) in the limiting sliding grooves (40) and the arc-shaped guide grooves (42), and the top portions of the sliding blocks (43) are fixedly connected with clamping blocks (44).

9. A pile foundation assisting device for bridge construction according to claim 8, characterized in that, The contact surface of the lower disc (37) and the upper disc (41) is a friction surface.

10. A construction method of a pile foundation auxiliary device for bridge construction, using the pile foundation auxiliary device for bridge construction according to claim 9, characterized by, The method comprises the following steps: S1: Move the trolley (1) to the position where it is needed, align the discharge opening with the hole on the ground, use the lifting assembly to hoist the reinforcement cage, and use the reinforcement cage to move downward to contact and press the lower positioning wheel (7) to make it swing, the torsional spring is compressed, the swing frame (6) drives the upper positioning wheel (7) to contact and cooperate with the reinforcement cage, the positioning wheel (7) is used to position and guide the reinforcement cage, the reinforcement cage is inserted into the hole through the discharge opening, and the placement of the reinforcement cage is completed; S2: After the placement of the reinforcement cage is completed, the rope hook (18) is removed from the reinforcement cage, the electric winding wheel (15) is started to wind the first pull rope (16), the rope hook (18) is moved upward away from the reinforcement cage, and the construction of the pile foundation is realized by pouring concrete; S3: After the pouring of the reinforcement cage is completed, when the height of the pile needs to be connected, the lower mold (19), the middle mold (20) and the upper mold (21) are installed in sequence by the lifting assembly, and the construction of the connected pile foundation is realized by pouring concrete; S4: During the steps S1-S3, the height of the installation plate (14) is adjusted by using the lifting piece (8) according to the height of the installed mold.

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