Connecting structure of bridge precast pipe pile and precast pile cap

Abstract

The application discloses a bridge prefabricated pipe pile and prefabricated pile cap connecting structure and relates to the technical field of bridge construction.The application comprises a prefabricated pipe pile and a prefabricated pile cap, the top of the prefabricated pipe pile is annularly provided with a plurality of pile body steels, the outer side of the pile body steel is welded with a plurality of groups of hinged sleeves, the inner side of the pile body steel is provided with a plurality of groups of pressing discs, the outer side of the pressing disc is annularly hinged with a plurality of inner supporting rods, the inner supporting rod is hinged with the corresponding hinged sleeve, the center of the plurality of groups of pressing discs is simultaneously penetrated and connected with an inner rod, the outer side of the inner rod is provided with a plurality of groups of lower pressing blocks, and the lower pressing block is located above the corresponding pressing disc.The application cooperates the pile body steel with the inverted conical connecting cavity through the pressing disc and the inner supporting rod, then pours the grout, connects the prefabricated pipe pile and the prefabricated pile cap together, adopts the above process, does not need accurate steel configuration, is simple in assembly, utilizes the inverted conical structure, has sufficient tensile and compressive strength at the connecting position, and meets the construction requirements.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of bridge construction, in particular to a connecting structure of a bridge prefabricated pipe pile and a prefabricated pile cap. BACKGROUND

[0002] As an important transportation infrastructure, the construction quality of a bridge is directly related to the safety and service life of transportation. A prefabricated pipe pile is a commonly used bearing structure for a bridge foundation. Due to its short construction period, controllable quality, and wide application range, it is widely used in bridge, road, and dike engineering. The prefabricated pipe pile is usually made of reinforced concrete or prestressed concrete. Its advantage is that it can be prefabricated in a factory environment to ensure its dimensional accuracy and quality stability, and can effectively reduce the on-site construction time.

[0003] The steel bar connecting process is a way of connecting the prefabricated pipe pile and the pile cap by steel bar lap joint or welding. The specific construction steps are as follows:

[0004] (1) Pipe pile and pile cap reserved hole position: reserve the steel bar connecting hole position on the prefabricated pipe pile and the prefabricated pile cap.

[0005] (2) Steel bar arrangement: according to the design requirements, arrange the steel bars at the connecting part of the pipe pile and the pile cap according to the specified manner. Usually, the steel bars are connected together by lap joint or welding.

[0006] (3) Steel bar binding and fixing: bind the steel bars firmly at the connecting position of the pipe pile and the pile cap to ensure the stability of the steel bar connection.

[0007] (4) Pouring concrete: after completing the steel bar connection, pour the concrete into the pile cap and ensure the compactness of the concrete by vibration.

[0008] The steel bar connecting process is relatively simple and flexible, which can effectively improve the tensile and compressive strength of the structure. However, the existing process requires accurate steel bar reinforcement and arrangement, and there may be position deviation during construction, which affects the connection quality. At the same time, manual steel bar binding is required, which is low in construction efficiency. When connecting the prefabricated pipe pile and the prefabricated pile cap of a high bridge, the vibrating equipment also needs to be hoisted to a high place for pouring concrete, which is not convenient for construction. SUMMARY

[0009] The purpose of the present application is to solve the above problems, and the present application provides a connecting structure of a bridge prefabricated pipe pile and a prefabricated pile cap.

[0010] In order to achieve the above purpose, the present application specifically adopts the following technical solutions:

[0011] The application discloses a connecting structure of a bridge prefabricated pipe pile and a prefabricated pile cap.

[0012] The bottom of the prefabricated pile cap is provided with a reverse taper connecting cavity, the outer side of the prefabricated pipe pile is provided with a lower supporting ring, the lower supporting ring can block the reverse taper connecting cavity, the inner wall of the reverse taper connecting cavity is annularly provided with a plurality of connecting steels, the connecting steels are arranged in correspondence with the inner supporting rods, and a grouting hole is formed in the top of the reverse taper connecting cavity.

[0013] Further, a I-shaped hole is formed in the top of the reverse taper connecting cavity, a I-shaped blocking pin is inserted into the I-shaped hole, a threaded hole is formed in the inner wall of the I-shaped hole, a locking bolt is inserted into the top of the I-shaped blocking pin, and the locking bolt is threadedly connected in the threaded hole.

[0014] Further, a countersunk hole is formed in the top of the I-shaped blocking pin, the locking bolt is inserted into the countersunk hole, and the locking bolt is a internal hexagonal bolt.

[0015] Further, the outer side of the inner supporting rod is sleeved with a connecting piece, the inner supporting rod is a light rod, the connecting piece is composed of two sleeve hoops and a connecting rod, the two sleeve hoops are welded at the two ends of the connecting rod, the inner wall of the sleeve hoop is provided with a circular hole and a straight slot, the inner supporting rod penetrates through the circular hole, and the connecting steel can pass through the straight slot.

[0016] Further, the end of the connecting steel close to the pressing disc is designed in a taper shape.

[0017] Further, the radius of the lower end of the reverse taper connecting cavity is greater than the radius of the prefabricated pipe pile.

[0018] Further, the outer surface of the inner rod is provided with external threads, and the lower pressing block is a nut block.

[0019] Further, the bottom of the inner rod is threadedly connected with an adjusting block.

[0020] Further, the top of the inner rod is provided with a top disc, and the outer diameter of the top disc is smaller than the outer diameter of the I-shaped blocking pin.

[0021] The application has the following beneficial effects:

[0022] 1. The application sets the inverted taper connecting cavity, hoists the prefabricated pile cap, directly inserts the pile body reinforcement into the inverted taper connecting cavity, then drives the inner rod to descend under the gravity of the prefabricated pile cap, drives the pressure plate to descend through the lower pressing block, makes the pile body reinforcement bend 75 degrees through the inner support rod, cooperates with the inverted taper connecting cavity, then pours the slurry, and connects the prefabricated pipe pile and the prefabricated pile cap together, so that the above process does not need accurate reinforcement configuration, is simple in assembly, and has enough tensile and compressive strength at the connecting position by utilizing the inverted taper structure, and meets the construction requirements.

[0023] 2. The application sets the connecting piece, moves the inner rod up and down, swings the inner support rod up and down under the elastic force of the pile body reinforcement, shakes the connecting piece downward, inserts the connecting reinforcement into the straight slot, automatically connects the inner support rod and the connecting reinforcement, and does not need manual binding, so that the construction efficiency is high.

[0024] 3. The application controls the up and down movement of the inner rod, swings the pile body reinforcement in the inverted taper connecting cavity and the inner support rod, and vibrates the concrete in the inverted taper connecting cavity, so that the additional vibrating equipment does not need to be hoisted at a high place, and the operation is simple. DETAILED DESCRIPTION

[0025] Figure 1 is a schematic view of the connection between the prefabricated pipe pile and the prefabricated pile cap of the bridge of the application;

[0026] Figure 2 is a schematic view of the internal structure of the connection between the prefabricated pipe pile and the prefabricated pile cap of the bridge of the application;

[0027] Figure 3 is a schematic view of the internal structure of the prefabricated pile cap of the application;

[0028] Figure 4 is an enlarged schematic view of part A in the application; Figure 3

[0029] Figure 5 is a schematic view of the prefabricated pipe pile structure of the application;

[0030] Figure 6 is an exploded view of the prefabricated pipe pile of the application;

[0031] Figure 7 is a schematic view of the structure of the pressure plate and the inner support rod of the application;

[0032] Figure 8 is a schematic view of the structure of the connecting piece of the application;

[0033] Figure 9 is a schematic view of the connection between the inner support rod and the connecting reinforcement of the application.

[0034] ​Attached reference numerals: 1. Precast pipe pile; 11. Lower support ring; 2. Precast pile cap; 21. Inverted conical connecting cavity; 22. Connecting reinforcement; 23. Grouting hole; 24. I-beam hole; 25. I-beam plug; 26. Locking bolt; 3. Pile body reinforcement; 31. Hinge sleeve; 4. Pressure plate; 5. Inner strut; 6. Connecting piece; 61. Hoop; 62. Connecting rod; 63. Round hole; 64. Straight groove; 7. Inner rod; 71. Lower pressure block; 72. Adjusting block; 73. Top plate. Detailed Implementation

[0035] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings.

[0036] Example 1, as Figures 1-9 As shown, the connection structure between the precast pipe pile and the precast pile cap of the bridge includes a precast pipe pile 1 and a precast pile cap 2. Several pile body steel bars 3 are arranged in a ring at the top of the precast pipe pile 1. Multiple sets of hinge sleeves 31 are welded to the outside of the pile body steel bars 3. Multiple sets of pressure plates 4 are arranged inside the pile body steel bars 3. Several inner support rods 5 are hinged in a ring on the outside of the pressure plate 4. The inner support rods 5 are hinged to the corresponding hinge sleeves 31. The length of the inner support rods 5 decreases from top to bottom. The center of the multiple sets of pressure plates 4 is simultaneously inserted with an inner rod 7. Multiple sets of lower pressure blocks 71 are arranged on the outside of the inner rods 7. The lower pressure blocks 71 are located above the corresponding pressure plates 4.

[0037] The bottom of the precast foundation 2 is provided with an inverted conical connecting cavity 21. The outer side of the precast pipe pile 1 is provided with a lower support ring 11, which can seal the inverted conical connecting cavity 21. The inner wall of the inverted conical connecting cavity 21 is provided with a number of connecting steel bars 22 in a ring. The connecting steel bars 22 are correspondingly provided with the inner support rod 5. The top of the inverted conical connecting cavity 21 is provided with a grouting hole 23.

[0038] The top of the inverted conical connecting cavity 21 is provided with an I-shaped hole 24, an I-shaped plug 25 is inserted into the inside of the I-shaped hole 24, a threaded hole is provided on the inner wall of the I-shaped hole 24, and a locking bolt 26 is inserted into the top of the I-shaped plug 25. The locking bolt 26 is threadedly connected in the threaded hole.

[0039] The inner support rod 5 is fitted with a connector 6 on its outer side. The inner support rod 5 is a smooth rod. The connector 6 consists of two sleeves 61 and a connecting rod 62. The two sleeves 61 are welded to both ends of the connecting rod 62. The sleeves 61 have a round hole 63 and a straight groove 64 inside. The inner support rod 5 passes through the round hole 63, and the connecting steel bar 22 can pass through the straight groove 64.

[0040] Construction process:

[0041] (1) The pipe pile and the bearing platform are prefabricated: the prefabricated bearing platform 2 is poured in advance, and the bottom is formed into an inverted cone-shaped connecting cavity 21 by using a mold. The prefabricated pipe pile is formed by using the original process, and then a hinged sleeve 31 is welded on the extended end of the pile body reinforcement 3. Then the inner rod 7 and the three sets of pressure plates 4 are assembled together, and then the inner support rod 5 on the three sets of pressure plates 4 is connected to the hinged sleeve 31. The inner support rod 5 can also correct the deviation of the pile body reinforcement 3 as a whole, so that the pile body reinforcement 3 remains consistent, facilitating subsequent hoisting.

[0042] (2) Hoisting: the locking bolt 26 is unscrewed from the threaded hole, and the I-shaped plug pin 25 is not restricted. The prefabricated prefabricated bearing platform 2 is hoisted above the prefabricated pipe pile 1, and the pile body reinforcement 3 is inserted into the inverted cone-shaped connecting cavity 21 as a whole. The inner rod 7 pushes the I-shaped plug pin 25 upwards, and the prefabricated bearing platform 2 is pressed on the lower supporting ring 11. Then the prefabricated bearing platform 2 is rotated until the connecting reinforcement 22 contacts the pile body reinforcement 3.

[0043] (3) Reinforcement binding and concrete pouring: concrete is poured into the inverted cone-shaped connecting cavity 21 through the grouting hole 23. At this time, a hammer head or other heavy object is lifted to hit the I-shaped plug pin 25, so that the I-shaped plug pin 25 is lowered, pushing the inner rod 7 to descend. The inner rod 7 drives the pressure plate 4 to descend through the lower pressing block 71. The pressure plate 4 drives the inner support rod 5 to descend, and the inclination angle of the inner support rod 5 decreases. When the heavy object is lifted, the inner support rod 5 drives the pressure plate 4 to rise under the action of the pile body reinforcement 3. The pressure plate 4 drives the inner rod 7 to rise, and the inner rod 7 drives the I-shaped plug pin 25 to rise. With repeated lifting of the heavy object, the inner support rod 5 swings back and forth in an inclined state, producing a shaking effect that shakes the connecting piece 6 on it to slide downward. It should be noted that without shaking, the connecting piece 6 will not slide downward along the inner support rod 5. With rapid shaking, the connecting piece 6 gradually moves towards the connecting reinforcement 22, and the connecting reinforcement 22 gradually inserts into the straight slot 64. The width and length of the straight slot 64 are greater than the diameter of the connecting reinforcement 22, so the connecting piece 6 can be sleeved on the connecting reinforcement 22. Until the connecting piece 6 moves to the position of the pile body reinforcement 3, the connecting reinforcement 22 and the pile body reinforcement 3 are connected by binding, and during the binding process, the pile body reinforcement 3 and the connecting reinforcement 22 rapidly swing in the inverted cone-shaped connecting cavity 21, which vibrates the concrete slurry to loosen it. It should be noted that after the connecting piece 6 is sleeved on the connecting reinforcement 22, the inner support rod 5 will swing together with the connecting reinforcement 22, but the swing angle will be smaller than the previous swing amplitude.

[0044] (4) locking: after the completion of the reinforcement connection and the concrete pouring, the locking bolt 26 is screwed into the threaded hole, the top of the I-shaped plug pin 25 is flush with the top of the prefabricated pile cap 2, at this time the inner rod 7 swings the pile body reinforcement 3 to 75° consistent with the inclination angle of the inverted conical connecting cavity 21, the inner support rod 5 drives the connecting piece 6 to swing to horizontal, the connecting piece 6 drives the inner top of the straight slot 64 to press on the connecting reinforcement 22, the connecting piece 6 is fixed with the connecting reinforcement 22 through friction force, the overall connection strength is improved, and the connection is completed.

[0045] The application adopts the inverted conical connection mode, does not need accurate reinforcement configuration, is simple to assemble, and has sufficient tensile and compressive strength at the connection through the inverted conical structure, meets the construction requirements, and simplifies the construction process.

[0046] In the above embodiment, the top of the I-shaped plug pin 25 is provided with a countersunk hole, and the locking bolt 26 is inserted into the countersunk hole, and the locking bolt 26 is a hexagonal bolt.

[0047] In the above embodiment, the end of the connecting reinforcement 22 close to the pressure plate 4 is designed in a conical shape, so that the connecting piece 6 can be more easily sleeved on the connecting reinforcement 22.

[0048] In the above embodiment, the radius of the lower end of the inverted conical connecting cavity 21 is greater than the radius of the prefabricated pipe pile 1, so that the connection is more convenient.

[0049] In the above embodiment, the outer surface of the inner rod 7 is provided with external threads, and the lower pressing block 71 is a nut block.

[0050] Further, the bottom of the inner rod 7 is threadedly connected with an adjusting block 72.

[0051] Still further, the top of the inner rod 7 is provided with a top disc 73, and the outer diameter of the top disc 73 is smaller than the outer diameter of the I-shaped plug pin 25.

[0052] Through the design of the embodiment, the position of the lower pressing block 71 can be adjusted according to the actual installation environment, and through the design of the adjusting block 72, the initial distance between the bottom of the inner rod 7 and the top of the prefabricated pipe pile 1 can be changed, the final bending angle of the pile body reinforcement 3 can be adjusted, and it is suitable for different construction environments.

[0053] The foregoing description of the disclosed embodiments enables a person skilled in the art to make or use the application. Modifications of these embodiments will occur to persons of skill in the art, and, while certain modifications are discussed, it is desired to be protected in accordance with the spirit and scope of the application. Therefore, the application is not limited to the specific embodiments shown and described, but only by the scope of the appended claims, unless otherwise specified.

Claims

1. A connection structure between precast pipe piles and precast pile caps for bridges, comprising precast pipe piles (1) and precast pile caps (2), characterized in that, The top of the precast pipe pile (1) is provided with a number of pile body steel bars (3) in a ring. The outside of the pile body steel bars (3) is welded with a number of hinge sleeves (31). The inside of the pile body steel bars (3) is provided with a number of pressure plates (4). The outside of the pressure plate (4) is hinged with a number of inner support rods (5). The inner support rods (5) are hinged to the corresponding hinge sleeves (31). The length of the inner support rods (5) decreases from top to bottom. The center of the multiple pressure plates (4) is simultaneously inserted with an inner rod (7). The outside of the inner rod (7) is provided with a number of lower pressure blocks (71). The lower pressure blocks (71) are located above the corresponding pressure plates (4). The bottom of the precast foundation (2) is provided with an inverted conical connecting cavity (21). The outer side of the precast pipe pile (1) is provided with a lower support ring (11). The lower support ring (11) can seal the inverted conical connecting cavity (21). The inner wall of the inverted conical connecting cavity (21) is provided with a number of connecting steel bars (22). The connecting steel bars (22) are provided with corresponding inner support rods (5). The top of the inverted conical connecting cavity (21) is provided with a grouting hole (23). The top of the inverted conical connecting cavity (21) is provided with an I-shaped hole (24), and an I-shaped plug (25) is inserted into the inside of the I-shaped hole (24). The inner wall of the I-shaped hole (24) is provided with a threaded hole, and a locking bolt (26) is inserted into the top of the I-shaped plug (25). The locking bolt (26) is threaded into the threaded hole.

2. The connection structure between precast pipe piles and precast pile caps for bridges according to claim 1, characterized in that, The top of the I-shaped plug (25) has a countersunk hole, and the locking bolt (26) is inserted into the countersunk hole. The locking bolt (26) is an internal hex bolt.

3. The connection structure between precast pipe piles and precast pile caps for bridges according to claim 1, characterized in that, The inner support rod (5) is fitted with a connector (6) on its outer side. The inner support rod (5) is a smooth rod. The connector (6) consists of two sleeves (61) and a connecting rod (62). The two sleeves (61) are welded to both ends of the connecting rod (62). The sleeves (61) have a round hole (63) and a straight groove (64) inside. The inner support rod (5) passes through the round hole (63), and the connecting steel bar (22) can pass through the straight groove (64).

4. The connection structure between precast pipe piles and precast pile caps for bridges according to claim 3, characterized in that, The end of the connecting steel bar (22) near the pressure plate (4) is tapered.

5. The connection structure between precast pipe piles and precast pile caps for bridges according to claim 4, characterized in that, The radius of the lower port of the inverted conical connecting cavity (21) is greater than the radius of the precast pipe pile (1).

6. The connection structure between precast pipe piles and precast pile caps for bridges according to claim 5, characterized in that, The outer surface of the inner rod (7) is provided with external threads, and the lower pressure block (71) is a nut block.

7. The connection structure between precast pipe piles and precast pile caps for bridges according to claim 6, characterized in that, The bottom of the inner rod (7) is threaded with an adjusting block (72).

8. The connection structure between precast pipe piles and precast pile caps for bridges according to claim 7, characterized in that, The top of the inner rod (7) is provided with a top plate (73), the outer diameter of which is smaller than the outer diameter of the I-shaped plug (25).

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