A prefabricated bridge pier installation structure and construction method

Abstract

The present application discloses a prefabricated bridge pier installation structure and a construction method, which relates to the field of bridge construction. The structure comprises a pier body for installation on an installation platform, wherein a plurality of vertically arranged ribs are fixedly connected to the installation platform, the pier body comprises a plurality of unit segments, a plurality of grouting tubes are vertically fixed along the circumference of the inner lower end of the unit segment, the upper end of the grouting tube is plugged with a connecting rib, the upper end of the connecting rib passes through the upper end of the unit segment and is fixed to the unit segment, the lower end of the grouting tube passes through the bottom surface of the unit segment and is provided with a rib or a connecting rib for insertion, the upper end of the grouting tube is connected with a grouting pipe, the lower end of the grouting tube is connected with a grouting pipe, the grouting pipe and the grouting pipe are used for connecting to the outside world; and a grouting mechanism for grouting the grouting tube is also included. The present application can reduce the length and mass of the pier by splitting the pier into a plurality of unit segments, thereby facilitating the hoisting and transportation of the pier, and at the same time can adjust the length of the pier to a certain extent to meet different construction requirements.

Description

Technical Field

[0001] The present application relates to the field of bridge construction, and in particular to a prefabricated bridge pier installation structure and a construction method. Background Art

[0002] During bridge construction, piers need to be installed first. Prefabricated piers have now appeared. During construction, pile foundations are first driven into the ground at the pier installation location, and a pier installation platform is formed on the upper surface of the pile foundation. The prefabricated piers are then hoisted onto the installation platform by a crane. In order to ensure a stable connection between the piers and the installation platform, multiple ribs need to be reserved on the installation platform, and a grouting tube is reserved inside the lower end of the prefabricated pier. The lower end of the grouting tube passes through the bottom surface of the pier and is used for the insertion of the ribs on the installation platform. After the pier is hoisted onto the installation platform, the grouting tube is grouted by a grouting machine to ensure the stability of the connection between the installation platform and the pier.

[0003] With respect to the above-mentioned related technologies, the inventors believe that since the bridge piers have a certain height and are heavy, it is rather laborious to hoist the bridge piers. Summary of the invention

[0004] In order to facilitate the installation of bridge piers, the present application provides a prefabricated bridge pier installation structure and a construction method.

[0005] In the first aspect, the present application provides a prefabricated bridge pier installation structure, which adopts the following technical solution:

[0006] A prefabricated bridge pier installation structure comprises a pier body for installation on an installation platform, a plurality of vertically arranged ribs are fixedly connected to the installation platform, the pier body comprises a plurality of unit segments, a plurality of grouting tubes are vertically fixed at the lower end of the unit segment along its own circumference, a connecting rib is inserted at the upper end of the grouting tube, the upper end of the connecting rib passes through the upper end of the unit segment and is fixed to the unit segment, the lower end of the grouting tube passes through the bottom surface of the unit segment and is inserted into the ribs or the connecting rib, the upper end of the grouting tube is connected to a grouting pipe, the lower end of the grouting tube is connected to a grouting pipe, the grouting pipe and the grouting pipe are used to communicate with the outside world; and a grouting mechanism for grouting the grouting tube is also included.

[0007] By adopting the above technical solution, when in use, one of the unit sections is hoisted on the installation platform, and the ribs are inserted into the grouting tube; then, multiple unit sections are assembled end to end one by one by a crane, and the connecting ribs on the previous unit section are inserted into the grouting tube in the next unit section; finally, the grouting tube in the unit section is grouted by the grouting mechanism. By splitting the pier into multiple unit sections, the length and weight of the pier can be reduced, thereby facilitating the hoisting and transportation of the pier, and at the same time, the length of the pier can be adjusted to a certain extent to meet different construction requirements; in addition, the construction of the prefabricated pier only requires prefabricated unit sections in the factory, without the need for on-site casting, saving construction time and reducing environmental pollution.

[0008] Optionally, the grouting mechanism includes a support frame, a grouting frame and a grouting machine, the support frame is used to be erected on the ground and arranged in a vertical direction, the grouting frame includes a connecting rod and a sleeve, the connecting rod is slidably connected to the support frame in a vertical direction, the support frame is provided with a driving component 1 for driving the connecting rod to move vertically, the sleeve is fixedly connected to the connecting rod, the sleeve moves in a vertical direction to be sleeved on a unit segment, a plurality of slides 1 are slidably connected in the sleeve, a plurality of insert pipes are fixedly connected to the slide 1, the insert pipes correspond to the slurry inlet pipes one by one, the insert pipes slide to be inserted into the slurry inlet pipe, and the grouting mechanism also includes a driving component 2 for driving the slide 1 to slide; the grouting machine is installed on the support frame, the slurry outlet of the grouting machine is connected to a grouting pipe, and the other end of the grouting pipe is used to connect to the insert pipe.

[0009] By adopting the above technical scheme, during construction, the sleeve frame is first placed on the installation platform, and the sleeve frame is arranged around the outside of the ribs, so that the unit segment can be lowered into the sleeve frame, and then the unit segment is hoisted into the sleeve frame by a crane, and then the sleeve frame is driven to move upward by the driving component 1, so that the insertion rod can be inserted into the slurry inlet pipe, and then the sliding plate 1 is driven to slide by the driving component 2, thereby driving the insertion pipe to slide, so that the insertion pipe is inserted into the slurry inlet pipe, and then the insertion pipe is grouted by the grouting machine, so that the concrete slurry can enter the grouting barrel, and when the upper unit segment needs to be grouted, it is only necessary to adjust the height of the sleeve frame by the driving component 1; the grouting mechanism can grout the unit segments of different heights.

[0010] Optionally, the driving assembly 1 includes a motor 1 and a screw rod 1, the screw rod 1 rotates to drive the connecting rod to slide, and the motor 1 is used to drive the screw rod 1 to rotate.

[0011] By adopting the above technical solution, when the sleeve is driven to move, the motor 1 is turned on to drive the screw rod 1 to rotate, thereby driving the sleeve to move. The driving component 1 has a simple structure and is easy to operate.

[0012] Optionally, a slide groove 1 for sliding the slide plate 1 is provided in the sleeve frame, and a plurality of the slide grooves 1 are interconnected. The driving component 2 includes an air pump, and the air pump is used to connect the slide groove 1.

[0013] By adopting the above technical solution, when driving the slide plate to slide, the slide groove is inflated with an air pump, so that the slide plate is driven to slide under the action of air pressure. The driving component 2 has a simple structure and is easy to operate, and can drive multiple slide plates to slide at one time.

[0014] Optionally, multiple slides 2 are slidably connected in the sleeve frame, and a slide groove 2 is opened in the sleeve frame for the slides 2 to slide, and the slide groove 2 is connected to the slide groove 1. Multiple blocking tubes are inserted on the slide 2 along the sliding direction of the slide 2, and the blocking tubes correspond to the slurry outlet pipes one by one. The blocking tubes slide to be inserted into the slurry outlet pipe, and a spring is fixedly connected to the slide 2 along the sliding direction of the slide 2, and the other end of the spring is fixedly connected to the blocking tube.

[0015] By adopting the above technical solution, when the air pump drives the insertion tube into the slurry inlet pipe, since the slide groove one and the slide groove two are connected, under the action of air pressure, the slide plate two slides, so that the blocking tube is inserted into the slurry discharge hole. After grouting the grouting tube, when the concrete slurry in the grouting tube flows to the slurry outlet pipe, the insertion rod will be pushed completely out of the unit section under the action of fluid pressure. At this time, it can be judged whether the concrete slurry in the grouting tube is full, thereby preventing the concrete slurry from overflowing from the slurry discharge hole.

[0016] Optionally, a plurality of mounting plates are fixedly connected to the sleeve frame, a push rod is slidably connected to the mounting plate, a driving component three for driving the push rod to slide is provided on the mounting plate, and the plurality of push rods are close to each other to clamp the unit segment.

[0017] By adopting the above technical solution, the driving component three can drive the push rod to slide, and the unit segment can be aligned by bringing multiple push rods close to each other, thereby ensuring that the connecting ribs or ribs can be smoothly inserted into the grouting tube.

[0018] Optionally, the driving component three includes a motor two and a screw rod two, the screw rod two rotates to drive the push rod to slide, and the motor two is used to drive the screw rod two to rotate.

[0019] By adopting the above technical solution, when driving the push rod to slide, the second motor is turned on to drive the second screw rod to rotate, thereby driving the push rod to slide. The driving component three has a simple structure and is easy to operate.

[0020] In a second aspect, the present application provides a construction method for a prefabricated bridge pier installation structure, which adopts the following technical solution:

[0021] A construction method for a prefabricated bridge pier installation structure comprises the following steps: step 1, hoisting one of the unit segments on the installation platform, and inserting the ribs into the grouting tube; step 2, assembling the unit segments one by one by the end, and inserting the connecting ribs on the previous unit segment into the grouting tube in the next unit segment; step 3, grouting the grouting tube in the unit segment by a grouting mechanism

[0022] By adopting the above technical solution, the bridge pier is divided into multiple unit sections, and the unit sections are constructed one by one, which is easy to operate.

[0023] In summary, this application includes the following beneficial technical effects:

[0024] 1. This application can reduce the length and mass of the piers by splitting them into multiple unit sections, thereby facilitating the hoisting and transportation of the piers. At the same time, the length of the piers can be adjusted to a certain extent to meet different construction requirements;

[0025] 2. The application facilitates the centering of the unit segment by setting the top rod, thereby ensuring that the connecting ribs or ribs can be smoothly inserted into the grouting tube. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a schematic diagram of the overall structure of a prefabricated bridge pier installation structure of the present application;

[0027] Figure 2 yes Figure 1 A cross-sectional view of

[0028] Figure 3 yes Figure 2 A magnified schematic diagram of the middle A area;

[0029] Figure 4 yes Figure 1 Partial structural cross-section view of the middle frame.

[0030] Description of reference numerals:

[0031] 1. Pier body; 2. Unit section; 3. Installation platform; 4. Reinforcement bar; 5. Grouting tube; 6. Connecting rib; 7. Slurry outlet pipe; 8. Slurry inlet pipe; 9. Support frame; 10. Connecting rod; 11. Sleeve frame; 12. Grouting machine; 13. Moving block; 14. Slideway; 15. Motor 1; 16. Screw rod 1; 17. Slideway 1; 18. Slide plate 1; 19. Insert pipe; 20. Air pump; 21. Air pipe; 22. Grouting pipe; 23. Connecting groove; 24. Connecting hole; 25. Grouting hole; 26. Slide plate 2; 27. Slideway 2; 28. Blocking pipe; 29. ​​Slot; 30. Spring; 31. Mounting plate; 32. Push rod; 33. Motor 2; 34. Screw rod 2; 35. Air groove. DETAILED DESCRIPTION

[0032] The following is combined with Figure 1-4 This application is described in further detail.

[0033] The present application embodiment discloses a prefabricated bridge pier installation structure. Figure 1 and Figure 2 The prefabricated bridge pier installation structure includes a pier body 1, which includes a plurality of unit segments 2. The unit segments 2 are cast by concrete. In this embodiment, the cross-section of the unit segments 2 is rectangular, one of which is used to be installed on the installation platform 3, and the other unit segments 2 are used to be assembled end to end in sequence along the vertical direction.

[0034] Reference Figure 2 and Figure 4 A plurality of vertically arranged ribs 4 are pre-buried on the mounting platform 3, and a plurality of grouting tubes 5 are vertically fixed along the circumference of the lower end of the unit segment 2. The grouting tubes 5 are located at the inner periphery of the unit segment 2, and the grouting tubes 5 are evenly distributed on four sides of the unit segment 2. The lower end of the grouting tube 5 passes through the bottom surface of the unit segment 2 and is inserted with the ribs 4. A connecting rib 6 is inserted at the upper end of the grouting tube 5. The upper end of the connecting rib 6 passes through the upper end of the unit segment 2 and is fixed to the unit segment 2. The part of the connecting rib 6 passing through the unit segment 2 is used to insert the lower end of the grouting tube 5; a grouting outlet pipe 7 is connected to the upper end of the grouting tube 5, and a grouting inlet pipe 8 is connected to the lower end of the grouting tube 5. The grouting inlet pipe 8 and the grouting outlet pipe 7 are horizontally arranged, and the ends of the grouting outlet pipe 7 and the grouting inlet pipe 8 away from the grouting tube 5 are flush with the outer wall of the unit segment 2.

[0035] When in use, one of the unit segments 2 is first installed on the installation platform 3 , and the ribs 4 are inserted into the grouting tube 5 , and then the other unit segments 2 are assembled end to end in sequence, and the connecting ribs 6 are inserted into the upper grouting tube 5 .

[0036] In order to ensure the stability of the connection between adjacent unit segments 2 and the unit segments 2 and the installation platform 3, the installation structure also includes a grouting machine 12 structure, which includes a support frame 9, a grouting frame and a grouting machine 12. The support frame 9 is used to be erected on the ground and is arranged in the vertical direction. The grouting frame includes a connecting rod 10 and a sleeve 11. The connecting rod 10 is slidably connected to the support frame 9 in the vertical direction. A moving block 13 is fixedly connected to the connecting rod 10. A slideway 14 for vertical sliding of the moving block 13 is provided on the support frame 9. The moving block 13 is inserted in the slideway 14. A driving component 1 for driving the connecting rod 10 to move vertically is provided on the support frame 9. The grouting frame is fixedly connected to one end of the connecting rod 10 away from the support frame 9, and the grouting machine 12 grouts the unit segment 2 through the grouting frame.

[0037] The driving assembly 1 includes a motor 15 and a screw 16. The motor 15 is fixedly connected to the upper end of the support frame 9 by screws. The screw 16 is rotatably connected to the support frame 9. The rotation axis and length direction of the screw 16 are both arranged in the vertical direction. The screw 16 threads through the moving block 13, and the output shaft of the motor 15 is coaxially fixedly connected to the upper end of the screw 16.

[0038] In another embodiment, the driving component 1 can also adopt a winch, with a fixed pulley provided on the top of the support frame 9, a pull rope wound and fixedly connected to the winch, the other end of the pull rope passes around the fixed pulley and is fixedly connected to the winch, and the moving block 13 is fixedly connected to the pull rope.

[0039] Reference Figure 3 and Figure 4 In this embodiment, the cross-section of the sleeve 11 is rectangular, and the sleeve 11 moves in the vertical direction to be sleeved on the unit section 2. The inner wall of the sleeve 11 fits on the outer wall of the unit section 2. Slide plates 18 are slidably connected in the four side walls of the sleeve 11. A slide groove 17 for the slide plate 18 to slide is provided in the sleeve 11. The four slide grooves 17 are interconnected. A plurality of insert pipes 19 are fixedly connected to one side of the slide plate 18 close to the inner wall of the sleeve 11. The number of insert pipes 19 on the same slide plate 18 is consistent with the number of grouting tubes 5 on the same side of the unit section 2 and corresponds one to one. The slide plate 18 slides to insert the insert pipe 19 into the slurry inlet pipe 8. The grouting machine 12 also includes a driving component 2 for driving the slide plate to slide.

[0040] Reference Figure 2 and Figure 3 The driving component 2 includes an air pump 20, which is fixedly connected to the moving block 13 by screws. The air outlet of the air pump 20 is connected to an air pipe 21, and the other end of the air pipe 21 is connected to the slide groove 17.

[0041] The grouting machine 12 is placed on the support frame 9, and the discharge port of the grouting machine 12 is connected to a grouting pipe 22. A connecting groove 23 is arranged in the inner ring of the sleeve 11. One end of the grouting pipe 22 away from the grouting machine 12 is connected to the connecting groove 23. A plurality of connecting holes 24 are provided in the sleeve 11. The connecting holes 24 are connected to the connecting groove 23. The connecting holes 24 correspond to the insert pipe 19 one by one. The insert pipe 19 is connected to a grouting hole 25. The insert pipe 19 slides to align the grouting hole 25 with the connecting hole 24. When the grouting hole 25 and the connecting hole 24 are aligned, the insert pipe 19 is partially inserted into the slurry inlet pipe 8.

[0042] In this embodiment, in order to facilitate the detection of whether the concrete slurry in the grouting tube 5 is full and prevent the concrete slurry from overflowing too much, a slide plate 26 is slidably connected in the sleeve frame 11, and a slide groove 27 for the slide plate 26 to slide is provided in the sleeve frame 11. The four slide grooves 27 are connected to each other, and the slide grooves 27 and the slide groove 17 are connected through the air groove 35. A plurality of plugging tubes 28 are inserted on one side of the slide plate 26 close to the inner wall of the sleeve frame 11, and a slot 29 for the plugging tube 28 to be inserted is provided on the slide plate 26. The number of plugging tubes 28 on the same slide plate 26 is the same as that on the other side. The number of grouting tubes 5 on the same side of the unit section 2 is consistent and one-to-one corresponding, and the slide plate 26 slides to insert the blocking tube 28 into the slurry outlet pipe 7; a spring 30 is fixedly connected in the slot 29 along the plugging direction of the blocking tube 28, and the other end of the spring 30 is fixedly connected to the blocking tube 28. In the initial position, the blocking tube 28 is completely located in the sleeve 11; in actual use, a displacement sensor can be arranged in the slot 29, and the displacement sensor is electrically connected to the grouting machine 12. When the blocking tube 28 is completely located in the slot 29, the displacement sensor is used to control the grouting machine to close.

[0043] Reference Figure 1 and Figure 2 In addition, in order to facilitate the smooth insertion of the ribs 4 or the connecting ribs 6 into the grouting tube 5, mounting plates 31 are fixedly connected to the four outer walls of the sleeve 11. The length direction of the mounting plate 31 is arranged along the thickness direction of the side wall of the sleeve 11. A push rod 32 is slidably connected to the mounting plate 31. The push rod 32 is in an inverted L shape. A driving component three for driving the push rod 32 to slide is provided on the mounting plate 31.

[0044] Driving component three includes motor two 33 and screw rod two 34. Motor two 33 is fixedly connected to the mounting plate 31 by screws. Screw rod two 34 is rotatably connected to the mounting plate 31. The rotation axis and length direction of screw rod two 34 are both arranged along the length direction of the mounting plate 31. Screw rod two 34 threads through the lower end of the top rod 32. The output shaft of motor two 33 is coaxially fixedly connected to one end of screw rod two 34.

[0045] The implementation principle of the prefabricated bridge pier installation structure of the present application embodiment is as follows: when in use, one of the unit sections 2 is hoisted on the installation platform 3, and the ribs 4 are inserted into the grouting tube 5; when the grouting tube 5 and the ribs 4 on the unit section 2 are aligned, the push rod 32 is driven to slide by the driving component three to center the unit section 2, and then the sleeve frame 11 is driven to move vertically by the driving component one, so that the insertion tube 19 and the slurry inlet pipe 8 are aligned, and the blocking pipe 28 and the slurry outlet pipe 7 are aligned; then the air pump 20 is turned on to inflate the slide 17 and the slide 2 27, drive the slide 1 18 and the slide 2 26 to slide, so that the insertion tube 19 is inserted into the slurry inlet pipe 8, and the blocking pipe 28 and the slurry outlet pipe 7 are aligned. 28 is inserted into the slurry outlet pipe 7, at which time the connecting hole 24 and the grouting hole 25 are aligned; then the grouting machine 12 is turned on to grout the sleeve 11, and the concrete slurry enters the insert pipe 19 through the connecting groove 23, the connecting hole 24 and the grouting hole 25, and enters the grouting tube 5 through the insert pipe 19 until the concrete slurry flows into the slurry outlet pipe 7. Under the fluid pressure, the plugging pipe 28 is pushed out of the slurry outlet pipe 7. When the plugging pipe 28 moves to the position of the displacement sensor, an electrical signal is triggered to close the grouting machine 12, and then the next unit segment 2 is hoisted to insert the connecting rib 6 into the grouting tube 5. The above operation is repeated until all unit segments 2 are installed.

[0046] The present application discloses a construction method for a prefabricated bridge pier installation structure, which comprises the following steps:

[0047] Step 1. Reference Figure 1 and Figure 2 , install the support frame 9, and position the sleeve 11 on the installation platform 3, so that the plurality of ribs 4 are all located in the sleeve 11 and for the unit segment 2 to be inserted;

[0048] Step 2: Reference Figure 2 and Figure 3 , one of the unit segments 2 is hoisted on the installation platform 3, and the ribs 4 are inserted into the grouting tube 5; when the grouting tube 5 and the ribs 4 on the unit segment 2 are aligned, the driving assembly 3 drives the push rod 32 to slide, so as to center the unit segment 2;

[0049] Step 3, the sleeve frame 11 is driven to move vertically by the driving component 1, so that the insertion pipe 19 and the pulp inlet pipe 8 are aligned, and the blocking pipe 28 and the pulp outlet pipe 7 are aligned;

[0050] Step 4, start the air pump 20, insert the cannula 19 into the pulp inlet pipe 8, and insert the plugging pipe 28 into the pulp outlet pipe 7;

[0051] Step 5, start the grouting machine 12, grout the casing 11, push the plugging pipe 28 out of the slurry outlet pipe 7, and when the plugging pipe 28 moves to the position of the displacement sensor, an electrical signal is triggered to shut down the grouting machine 12;

[0052] Step 6: hoist the next unit section 2, insert the connecting rib 6 into the grouting tube 5, and repeat the above steps until all the unit sections 2 are installed.

[0053] 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 prefabricated bridge pier installation structure, comprising a pier body (1) for installation on an installation platform (3), wherein a plurality of vertically arranged ribs (4) are fixedly connected to the installation platform (3), characterized in that: The pier body (1) comprises a plurality of unit segments (2), wherein a plurality of grouting tubes (5) are vertically fixed at the lower end of the unit segment (2) along its own circumference, and the upper end of the grouting tube (5) is plugged with a connecting rib (6), the upper end of the connecting rib (6) passes through the upper end of the unit segment (2) and is fixed to the unit segment (2), the lower end of the grouting tube (5) passes through the bottom surface of the unit segment (2) and is inserted into the rib (4) or the connecting rib (6), and the upper end of the grouting tube (5) is connected to the upper end of the grouting tube (5). The invention relates to a grouting tube (5) having a grouting outlet pipe (7), the lower end of which is connected to a grouting inlet pipe (8), the grouting outlet pipe (7) and the grouting inlet pipe (8) being used to communicate with the outside world; and also comprising a grouting machine (12) structure for grouting the grouting tube (5); the grouting machine (12) structure comprising a support frame (9), a grouting frame and a grouting machine (12), the support frame (9) being used to be erected on the ground and arranged in a vertical direction, the grouting frame comprising a connecting rod (10) and a sleeve frame (11), the connecting rod (11) and the sleeve frame (12) The connecting rod (10) is slidably connected to the support frame (9) in the vertical direction, and the support frame (9) is provided with a driving component 1 for driving the connecting rod (10) to move vertically. The sleeve frame (11) is fixedly connected to the connecting rod (10), and the sleeve frame (11) moves in the vertical direction to be sleeved on the unit segment (2). A plurality of slide plates 1 (18) are slidably connected in the sleeve frame (11), and a plurality of insert pipes (19) are fixedly connected to the slide plate 1 (18), and the insert pipes (19) correspond to the slurry inlet pipe (8) one by one. The insert pipes (19) slide to be inserted into the slurry inlet pipe (8), and the grouting machine (12) structure also includes a driving component 2 for driving the slide plate 1 (18) to slide; the grouting machine (12) is installed on the support frame (9), and the slurry outlet of the grouting machine (12) is connected to a grouting pipe (22), and the other end of the grouting pipe (22) is used to connect to the insert pipe (19).

2. The prefabricated bridge pier installation structure according to claim 1, characterized in that: The driving assembly 1 comprises a motor 1 (15) and a screw rod 1 (16); the screw rod 1 (16) rotates to drive the connecting rod (10) to slide; the motor 1 (15) is used to drive the screw rod 1 (16) to rotate.

3. The prefabricated bridge pier installation structure according to claim 1 is characterized by: The sleeve frame (11) is provided with a slide groove (17) for sliding the slide plate (18), and a plurality of the slide grooves (17) are interconnected. The drive component (2) includes an air pump (20), and the air pump (20) is used to connect the slide grooves (17).

4. The prefabricated bridge pier installation structure according to claim 3 is characterized by: A plurality of slide plates (26) are slidably connected in the sleeve frame (11), a slide groove (27) is provided in the sleeve frame (11) for the slide plates (26) to slide, the slide groove (27) is connected to the slide groove (17), a plurality of plugging tubes (28) are inserted on the slide plates (26) along the sliding direction of the slide plates (26), the plugging tubes (28) and the slurry outlet pipes (7) correspond one to one, the plugging tubes (28) slide to be inserted into the slurry outlet pipes (7), a spring (30) is fixedly connected on the slide plates (26) along the sliding direction of the slide plates (26), and the other end of the spring (30) is fixedly connected to the plugging tube (28).

5. The prefabricated bridge pier installation structure according to claim 1 is characterized by: A plurality of mounting plates (31) are fixedly connected to the sleeve frame (11), a push rod (32) is slidably connected to the mounting plate (31), a driving component (3) for driving the push rod (32) to slide is provided on the mounting plate (31), and the plurality of push rods (32) are close to each other to clamp the unit segment (2).

6. The prefabricated bridge pier installation structure according to claim 5, characterized in that: The driving assembly three comprises a motor two (33) and a screw rod two (34); the screw rod two (34) rotates to drive the push rod (32) to slide; the motor two (33) is used to drive the screw rod two (34) to rotate.

7. A construction method for a prefabricated bridge pier installation structure according to any one of claims 1 to 6, characterized in that: The method comprises the following steps: step 1, hoisting one of the unit segments (2) onto a mounting platform (3), and inserting a rib (4) into a grouting tube (5); step 2, assembling a plurality of unit segments (2) end to end one by one by means of a crane, and inserting a connecting rib (6) on a preceding unit segment (2) into a grouting tube (5) in a succeeding unit segment (2); and step 3, grouting the grouting tube (5) in the unit segment (2) by means of a grouting machine (12).

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