Self-resetting energy dissipation connecting structure for prefabricated assembled bridge pier and construction method of self-resetting energy dissipation connecting structure

Abstract

The invention relates to a self-resetting energy dissipation connecting structure for prefabricated assembled piers and a construction method thereof.A connecting block is arranged at the top of a first circular truncated cone at the top end of a first pier, the top of a second circular truncated cone at the top end of the connecting block is fixedly connected with the bottom end of a second pier, and a plurality of third bolts and first bolts are annularly distributed on the outer wall of an annular sleeve; one end of the third bolt penetrates through the second bridge pier and is in threaded connection with the second circular truncated cone, one end of the first bolt penetrates through the first bridge pier and is in threaded connection with the first circular truncated cone, an annular groove is formed in the connecting block, and a bevel gear ring is fixedly connected to the inner wall of the top of the annular groove; a first stabilizing assembly is arranged at the top of the connecting block; a second stabilizing assembly is arranged in the connecting block; a fixing assembly is arranged at the bottom of the connecting block; the problems that when an earthquake occurs, a connecting piece and a rotary knob piece of an existing self-resetting energy dissipation connecting structure for the prefabricated assembled pier are prone to sliding, and the anti-seismic performance is poor are solved.

Description

Technical Field

[0001] The present invention belongs to the field of bridge construction, and relates to a self-centering energy-dissipating connection structure for precast segmental piers and a construction method thereof. Background Art

[0002] Existing precast pier connection devices basically use unbonded prestressing tendons that penetrate through all segments of the pier column to ensure the load-bearing performance of the splicing joint under horizontal forces such as earthquakes. However, this technology causes the pier to bear additional prestress loads in addition to the gravity transmitted from the upper structure of the bridge. To ensure that the segmental concrete is not severely crushed when resisting earthquake effects, it is necessary to reinforce the entire segment with steel pipes or FRP materials or use high-strength special concrete, resulting in a high cost. Moreover, the energy-dissipating performance of the segment connection with only unbonded prestressing tendons is poor. To ensure the energy-dissipating performance of the connection, a certain number of energy-dissipating steel bars usually need to pass through the splicing joint. However, the energy-dissipating steel bars will increase the residual displacement, weaken the self-centering performance of the segmental precast pier, and cause the construction to be more troublesome.

[0003] Therefore, some scholars have designed a seismic precast segmental pier connection device. However, the existing seismic precast segmental pier connection device can only complete the fixation of the lower precast segment and the upper precast segment. The fixation structure is simple, and since there is no limit mechanism between the connecting piece and the knob piece, the connecting piece and the knob piece are prone to sliding during an earthquake, resulting in loosening of the lower precast segment and the upper precast segment. Summary of the Invention

[0004] In view of this, in order to solve the problems of the existing self-centering energy-dissipating connection structure for precast segmental piers, which can only complete the fixation of the lower precast segment and the upper precast segment, the fixation structure is simple, and since there is no limit mechanism between the connecting piece and the knob piece, the connecting piece and the knob piece are prone to sliding during an earthquake and the seismic performance is poor, the present invention provides a self-centering energy-dissipating connection structure for precast segmental piers and a construction method thereof.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A self - resetting energy - dissipating connection structure for prefabricated and assembled bridge piers, including a first bridge pier located in a foundation pit and a second bridge pier located above the first bridge pier. The top end of the first bridge pier is fixedly connected with a first frustum. A connecting block is arranged on the top of the first frustum. A second frustum is arranged on the top end of the connecting block. The top of the second frustum is fixedly connected with the bottom end of the second bridge pier. The outer wall of the connecting block is rotatably connected with an annular sleeve, and the top end of the first bridge pier and the bottom end of the second bridge pier both extend into the annular sleeve. A plurality of third bolts and first bolts are annularly arranged on the outer wall of the annular sleeve. One end of the third bolt penetrates through the second bridge pier and is threadedly connected with the second frustum. One end of the first bolt penetrates through the first bridge pier and is threadedly connected with the first frustum. An annular groove is arranged in the connecting block. The top inner wall of the annular groove is fixedly connected with a bevel gear ring. A rotating shaft is rotatably connected in the annular sleeve. One end of the rotating shaft extends into the annular groove and is fixedly connected with a bevel gear, and the bevel gear meshes with the bevel gear ring. The other end of the rotating shaft is provided with a hexagonal groove;

[0007] The top of the connecting block is provided with a first stabilizing component for increasing the stability between the connecting block and the second frustum;

[0008] The connecting block is provided with a second stabilizing component for further increasing the fastening between the second frustum and the connecting block;

[0009] The bottom of the connecting block is provided with a fixing component for increasing the connection between the first bridge pier, the first frustum and the connecting block simultaneously.

[0010] Furthermore, the first stabilizing component includes a fixing platform fixedly connected to the top of the connecting block. A circular groove is arranged at the bottom of the second frustum. Two symmetric triangular blocks that slide into the circular groove are slidably connected to the top of the fixing platform. The same sliding rod slidably penetrates between the two triangular blocks. A second spring is sleeved on the outer wall of the sliding rod, and the two ends of the second spring are respectively fixedly connected with the two triangular blocks.

[0011] Furthermore, the second stabilizing component includes a first annular sliding groove arranged in the connecting block. A second annular sliding groove is arranged at the bottom of the second frustum. An annular sliding block that slides into the second annular sliding groove is slidably connected in the first annular sliding groove. A plurality of third springs are fixedly connected to the bottom inner wall of the first annular sliding groove. The top ends of the third springs are fixedly connected with the bottom of the annular sliding block. External threads are arranged on the outer wall of the annular sliding block, and internal threads that are threadedly connected with the external threads are arranged on the inner wall of the second annular sliding groove.

[0012] Further, the fixing component includes a screw rod fixedly connected to the bottom of the connecting block, and the bottom end of the screw rod extends into the first frustum. A cylindrical block that slides and extends into the first frustum is threadedly sleeved on the outer wall of the screw rod. A plurality of through holes are annularly arranged in the first frustum. A trapezoidal block that is in contact with the cylindrical block is slidably connected in the through holes. A plurality of clamping grooves are annularly arranged on the inner wall of the first bridge pier, and the clamping grooves are engaged with the trapezoidal blocks. A plurality of sliding grooves are annularly arranged on the inner wall of the first frustum. A wedge-shaped block is slidably connected in the sliding grooves. One end of the wedge-shaped block away from the screw rod is fixedly connected to a plurality of first springs, and the other ends of the first springs are fixedly connected to one side inner wall of the sliding grooves.

[0013] Further, annular grooves are provided at one ends of the second bridge pier and the first bridge pier close to each other. A friction plate is fixedly connected to the inner wall of one side of the annular groove away from the connecting block. Ring-shaped sliders are slidably connected to the top and bottom of the connecting block, and one sides of the ring-shaped sliders away from the connecting block extend into the annular grooves and are in contact with the friction plates. When the first frustum and the second frustum squeeze the connecting block, the connecting block can be easily rotated through the cooperation of the ring-shaped sliders and the annular grooves.

[0014] Further, a first injection hole communicating with the circular groove is provided in the second frustum. A second injection hole is provided in the connecting block. A plurality of circular holes are provided in the cylindrical block. Concrete is poured into the circular groove through the first injection hole to fill the circular groove. Concrete is poured into the first frustum through the second injection hole. The concrete enters below the cylindrical block through the circular holes, and thus the first bridge pier, the second bridge pier, the first frustum, the connecting block and the second frustum can be connected into a whole to prevent the first bridge pier and the second bridge pier from loosening.

[0015] Further, a ring-shaped block located in the first annular sliding groove is fixedly sleeved on the outer wall of the annular slider. A stop block matched with the ring-shaped block is fixedly connected to the top inner wall of the first annular sliding groove. The cooperation of the ring-shaped block and the stop block can prevent the annular slider from disengaging from the first annular sliding groove.

[0016] Further, rubber rings are fixedly connected to the top and bottom of the annular sleeve, and the inner walls of the two rubber rings are respectively in contact with the outer walls of the first bridge pier and the second bridge pier.

[0017] Further, a shielding piece is provided on one side of the annular sleeve. A hexagonal block matched with the hexagonal groove is fixedly connected to the side of the shielding piece close to the bevel gear. A plurality of second bolts are provided in the shielding piece, and the other ends of the second bolts are threadedly connected to the annular sleeve. The hexagonal block is inserted into the hexagonal groove, and the shielding piece is fixed to the annular sleeve through the second bolts to prevent the rotating shaft and the bevel gear from loosening during an earthquake.

[0018] A construction method for a self-resetting energy-dissipating connection structure for prefabricated assembled bridge piers includes the following steps:

[0019] S1. Place the annular sleeve and the connecting block over the top of the first frustum. The cylindrical block can extend into the first frustum. Then hoist the second bridge pier into the annular sleeve and make the bottom end of the second frustum touch the top of the connecting block. At this time, the annular sliders at the top and bottom of the connecting block can extend into the annular grooves in the second frustum and the first frustum respectively. Tighten multiple first bolts and third bolts. Through the first bolts and third bolts, the annular sleeve can be fixed to the first bridge pier, the second bridge pier, the first frustum and the second frustum respectively, increasing the stability of the annular sleeve, the connecting block, the first bridge pier, the second bridge pier, the first frustum and the second frustum.

[0020] S2. When the top of the second frustum touches the connecting block, the two triangular blocks move towards the middle under the action of the circular grooves, and the second spring is compressed until the triangular blocks can completely enter the circular grooves. At this time, the triangular blocks slide towards both sides under the elastic force of the second spring, and the bottom of the triangular blocks can touch the inner wall of the bottom of the circular grooves, thereby increasing the fixation between the connecting block and the second frustum.

[0021] S3. Then insert a hexagonal wrench (not shown in the figure) into the hexagonal groove and drive the rotating shaft and the bevel gear to rotate through the hexagonal wrench. The bevel gear is threadedly connected to the bevel gear ring. The bevel gear drives the bevel gear ring and the connecting block to rotate. Since the cylindrical block slides and extends into the first frustum, as the connecting block drives the screw rod to rotate, the cylindrical block threadedly connected to the screw rod slides downward. The cylindrical block can push the trapezoidal block to slide outward, and then the trapezoidal block can be clamped into the card slot to increase the stability of the first frustum and the first bridge pier. Since the cylindrical block extended into the first frustum before, the wedge block was squeezed into the sliding groove. When the cylindrical block moves downward a certain distance, the wedge block moves towards the middle under the elastic force of the first spring after losing the block of the cylindrical block. At this time, the bottom of the wedge block can touch the top of the cylindrical block, thereby increasing the fastening between the connecting block and the first frustum.

[0022] S4. When the second frustum moves downward, the second frustum pushes the annular slider downward, and the third spring starts to be compressed. The top of the annular slider can extend into the second annular chute for a short distance. As the connecting block drives the rotation of the annular slider, the internal thread and the external thread are threadedly connected. Therefore, the annular slider slides upward into the second annular chute to increase the fastening between the second frustum and the connecting block.

[0023] S5. Pour concrete into the circular groove through the first injection hole to fill the circular groove. Pour concrete into the first frustum through the second injection hole. The concrete enters below the cylindrical block through the round hole, and then the first bridge pier, the second bridge pier, the first frustum, the connecting block and the second frustum can be connected as a whole to prevent the first bridge pier and the second bridge pier from loosening. Then insert the hexagonal block into the hexagonal groove and fix the shielding piece to the annular sleeve through the second bolt to prevent the rotating shaft and the bevel gear from loosening during an earthquake.

[0024] The beneficial effects of the present invention are as follows:

[0025] 1. For a self - resetting energy - dissipating connection structure for precast segmental bridge piers disclosed by the present invention, when the second frustum touches the top of the connecting block, the two triangular blocks move towards the middle under the action of the circular groove, and the second spring is compressed until the triangular blocks can completely enter the circular groove. At this time, the triangular blocks slide towards both sides under the elastic force of the second spring, and the bottom of the triangular blocks can touch the inner wall of the bottom of the circular groove, thereby increasing the fixation between the connecting block and the second frustum and making the connection between the second frustum and the connecting block tighter.

[0026] 2. For a self - resetting energy - dissipating connection structure for precast segmental bridge piers disclosed by the present invention, the bevel gear drives the bevel gear ring, the connecting block and the screw rod to rotate. The cylindrical block slides downward under the action of the screw rod, and the cylindrical block can push the trapezoidal block to slide outward, thereby being able to snap the trapezoidal block into the card slot to increase the stability of the first frustum and the first bridge pier. After the cylindrical block moves downward a certain distance, the wedge block moves towards the middle under the elastic force of the first spring after losing the blockage of the cylindrical block. At this time, the bottom of the wedge block can touch the top of the cylindrical block, thereby increasing the fastening between the connecting block and the first frustum.

[0027] 3. For a self - resetting energy - dissipating connection structure for precast segmental bridge piers disclosed by the present invention, the annular sleeve and the connecting block are sleeved on the top of the first frustum, the second bridge pier is hoisted into the annular sleeve, and the bottom end of the second frustum touches the top of the connecting block. Then, the second bridge pier and the first bridge pier are extended into the annular sleeve at the same time. Tighten a plurality of first bolts, and the first bolts can fix the annular sleeve to the first bridge pier, the second bridge pier, the first frustum and the second frustum respectively, maintaining the stability of the annular sleeve, the first bridge pier and the second bridge pier, and at the same time being able to prevent the first bridge pier and the second bridge pier from having displacement and deflection phenomena.

[0028] 4. For a self - resetting energy - dissipating connection structure for precast segmental bridge piers disclosed by the present invention, concrete is poured into the circular groove through the first injection hole to fill the circular groove. Concrete is poured into the first frustum through the second injection hole, and the concrete enters the lower part of the cylindrical block through the circular hole, thereby being able to connect the first bridge pier, the second bridge pier, the first frustum, the connecting block and the second frustum into a whole, preventing the first bridge pier and the second bridge pier from loosening. Then, the hexagonal block is inserted into the hexagonal groove, and the shielding piece is fixed to the annular sleeve through the second bolt to prevent the rotating shaft and the bevel gear from loosening during an earthquake.

[0029] 5. A self - resetting energy - dissipating connection structure for precast segmental piers disclosed by the present invention drives the connecting block to rotate by rotating the rotating shaft and bevel gear. This not only makes the cylindrical block move downward to engage the trapezoidal block into the card slot, but also enables the wedge - shaped block to clamp the cylindrical block. Thus, the connection tightness of the first pier, the first frustum, and the connecting block can be increased at one time. Moreover, the connecting block can drive the annular slider to rotate to enhance the fixation between the connecting block and the second frustum. And through the cooperation of the connecting block and the annular sleeve, the first pier and the second pier can be covered to prevent the displacement of the first pier and the second pier during an earthquake, improving the seismic performance.

[0030] Other advantages, objectives, and features of the present invention will be described to some extent in the subsequent specification, and to some extent, will be obvious to those skilled in the art based on the study of the following text, or can be taught from the practice of the present invention. The objectives and other advantages of the present invention can be achieved and obtained through the following specification. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to make the objectives, technical solutions, and advantages of the present invention clearer, the present invention will be described in detail preferably with reference to the accompanying drawings, where:

[0032] Figure 1 is the front - view sectional view of a self - resetting energy - dissipating connection structure for precast segmental piers of the present invention;

[0033] Figure 2 For the present invention Figure 1 is the three - dimensional view of the connecting block from the first perspective;

[0034] Figure 3 For the present invention Figure 1 is the three - dimensional view of the connecting block from the second perspective;

[0035] Figure 4 For the present invention Figure 1 is the three - dimensional sectional view of the connecting block;

[0036] Figure 5 For the present invention Figure 1 is the three - dimensional sectional view of the second frustum;

[0037] Figure 6 For the present invention Figure 1 is the three - dimensional sectional view of the first frustum;

[0038] Figure 7 For the present invention Figure 1 is the three - dimensional view of the rotating shaft and bevel gear;

[0039] Figure 8 For the present invention Figure 1 is the three - dimensional view of the annular sleeve;

[0040] Figure 9 For the present invention Figure 1 Front view cross-sectional view of the annular sleeve in the present invention.

[0041] Reference numerals: 1, foundation pit; 2, first pier; 3, second pier; 4, first frustum; 5, connecting block; 6, second frustum; 7, annular sleeve; 8, first bolt; 9, annular groove; 10, bevel gear ring; 11, rotating shaft; 12, bevel gear; 13, circular ring slider; 14, annular groove; 15, screw; 16, cylindrical block; 17, trapezoidal block; 18, clamping groove; 19, through hole; 20, sliding groove; 21, first spring; 22, wedge block; 23, fixed platform; 24, triangular block; 25, sliding rod; 26, second spring; 27, circular groove; 28, first annular sliding groove; 29, annular slider; 30, external thread; 31, second annular sliding groove; 32, internal thread; 33, friction plate; 34, rubber ring; 35, first injection hole; 36, second injection hole; 37, round hole; 38, circular ring block; 39, stop block; 40, hexagonal block; 41, shielding piece; 42, second bolt; 43, hexagonal groove; 44, third spring; 45, third bolt. Specific embodiments

[0042] The following specific examples illustrate the embodiments of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments. Various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention.

[0043] Example 1

[0044] As Figure 1-8 shown, a self-resetting energy-dissipating connection structure for precast assembled piers includes a first pier 2 located in a foundation pit 1 and a second pier 3 located above the first pier 2. The top end of the first pier 2 is fixedly connected to a first frustum 4 by bolts. A connecting block 5 is provided on the top of the first frustum 4. A second frustum 6 is provided at the top end of the connecting block 5. The top of the second frustum 6 is fixedly connected to the bottom end of the second pier 3 by bolts. The outer wall of the connecting block 5 is rotatably connected to an annular sleeve 7, and the top end of the first pier 2 and the bottom end of the second pier 3 both extend into the annular sleeve 7. Rubber rings 34 are fixedly connected to the top and bottom of the annular sleeve 7 by bolts, and the inner walls of the two rubber rings 34 are respectively in contact with the outer walls of the first pier 2 and the second pier 3.

[0045] A plurality of third bolts 45 and first bolts 8 are respectively arranged in a circular pattern on the outer wall of the annular sleeve 7. One end of the third bolt 45 penetrates through the second bridge pier 3 and is threadedly connected to the second frustum 6. One end of the first bolt 8 penetrates through the first bridge pier 2 and is threadedly connected to the first frustum 4. An annular groove 9 is provided in the connecting block 5. The inner wall of the top of the annular groove 9 is fixedly connected with a bevel gear ring 10. A rotating shaft 11 is rotatably connected in the annular sleeve 7. One end of the rotating shaft 11 extends into the annular groove 9 and is fixedly connected with a bevel gear 12, and the bevel gear 12 meshes with the bevel gear ring 10. The other end of the rotating shaft 11 is provided with a hexagonal groove 43. The top of the connecting block 5 is provided with a first stabilizing component for increasing the stability of the connecting block 5 and the second frustum 6. The connecting block 5 is provided with a second stabilizing component for further increasing the fastening of the second frustum 6 and the connecting block 5. The bottom of the connecting block 5 is provided with a fixing component for simultaneously increasing the connection of the first bridge pier 2, the first frustum 4 and the connecting block 5. Annular grooves 14 are provided at one ends of the second bridge pier 3 and the first bridge pier 2 close to each other. The inner wall of one side of the annular groove 14 away from the connecting block 5 is fixedly connected with a friction plate 33 by bolts. Ring sliders 13 are slidably connected to the top and bottom of the connecting block 5, and one side of the ring slider 13 away from the connecting block 5 extends into the annular groove 14 and touches the friction plate 33. When the first frustum 4 and the second frustum 6 squeeze the connecting block 5, the connecting block 5 can be easily rotated through the cooperation of the ring slider 13 and the annular groove 14.

[0046] A first injection hole 35 communicating with the circular groove 27 is provided in the second frustum 6. A second injection hole 36 is provided in the connecting block 5. A plurality of circular holes 37 are provided in the cylindrical block 16. Concrete is poured into the circular groove 27 through the first injection hole 35 to fill the circular groove 27. Concrete is poured into the first frustum 4 through the second injection hole 36. The concrete enters the lower part of the cylindrical block 16 through the circular holes 37, so that the first bridge pier 2, the second bridge pier 3, the first frustum 4, the connecting block 5 and the second frustum 6 can be connected into a whole, preventing the first bridge pier 2 and the second bridge pier 3 from loosening.

[0047] In the present invention, the first stabilizing component includes a fixing platform 23 fixedly connected to the top of the connecting block 5 by bolts. A circular groove 27 is provided at the bottom of the second frustum 6. Two symmetric triangular blocks 24 slidably connected to the top of the fixing platform 23 extend into the circular groove 27. A same sliding rod 25 slidably penetrates between the two triangular blocks 24. A second spring 26 is sleeved on the outer wall of the sliding rod 25, and both ends of the second spring 26 are fixedly connected to the two triangular blocks 24 respectively. When the second frustum 6 touches the top of the connecting block 5, the two triangular blocks 24 move towards the middle under the action of the circular groove 27, and the second spring 26 is compressed until the triangular blocks 24 can completely enter the circular groove 27. At this time, the triangular blocks 24 slide towards both sides under the elastic force of the second spring 26, and the bottom of the triangular blocks 24 can touch the inner wall of the bottom of the circular groove 27, thereby increasing the fixing property of the connecting block 5 and the second frustum 6 and making the connection between the second frustum 6 and the connecting block 5 closer.

[0048] In the present invention, the second stabilizing component includes a first annular sliding groove 28 provided in the connecting block 5. A second annular sliding groove 31 is provided at the bottom of the second frustum 6. An annular slider 29 slidably connected in the first annular sliding groove 28 extends into the second annular sliding groove 31. A plurality of third springs 44 are fixedly connected to the inner wall of the bottom of the first annular sliding groove 28. The top ends of the third springs 44 are fixedly connected to the bottom of the annular slider 29. An external thread 30 is provided on the outer wall of the annular slider 29, and an internal thread 32 threadedly connected to the external thread 30 is provided on the inner wall of the second annular sliding groove 31.

[0049] In the present invention, the fixing component includes a screw rod 15 fixedly connected to the bottom of the connecting block 5 by bolts, and the bottom end of the screw rod 15 extends into the first frustum 4. A cylindrical block 16 slidably sleeved on the outer wall of the screw rod 15 extends into the first frustum 4. A plurality of through holes 19 are annularly provided in the first frustum 4. A trapezoidal block 17 slidably connected in the through holes 19 touches the cylindrical block 16. A plurality of clamping grooves 18 are annularly provided in the inner wall of the first pier 2, and the clamping grooves 18 are engaged with the trapezoidal block 17. A plurality of sliding grooves 20 are annularly provided in the inner wall of the first frustum 4. A wedge-shaped block 22 slidably connected in the sliding grooves 20 is fixedly connected to one end away from the screw rod 15 with a plurality of first springs 21, and the other ends of the first springs 21 are fixedly connected to one side inner wall of the sliding grooves 20. By driving the bevel gear 12 to drive the bevel gear ring 10, the connecting block 5 and the screw rod 15 to rotate, the cylindrical block 16 slides downward under the action of the screw rod 15. The cylindrical block 16 can push the trapezoidal block 17 to slide outward, thereby being able to engage the trapezoidal block 17 into the clamping groove 18 to increase the stability of the first frustum 4 and the first pier 2. When the cylindrical block 16 moves downward a certain distance, the wedge-shaped block 22 moves towards the middle under the elastic force of the first spring 21 after losing the block of the cylindrical block 16. At this time, the bottom of the wedge-shaped block 22 can touch the top end of the cylindrical block 16, thereby increasing the fastening property of the connecting block 5 and the first frustum 4.

[0050] In the present invention, an annular block 38 is fixedly sleeved on the outer wall of the annular slider 29 and is located in the first annular chute 28. A stop block 39 that cooperates with the annular block 38 is fixedly connected to the top inner wall of the first annular chute 28 by bolts. The cooperation between the annular block 38 and the stop block 39 can prevent the annular slider 29 from detaching from the first annular chute 28.

[0051] Embodiment 2

[0052] As a further improvement of the previous embodiment, as Figure 1-9 shown, a self - resetting energy - dissipating connection structure for prefabricated and assembled bridge piers includes a first bridge pier 2 located in a foundation pit 1 and a second bridge pier 3 located above the first bridge pier 2. The top end of the first bridge pier 2 is fixedly connected to a first frustum 4 by bolts. A connection block 5 is provided on the top of the first frustum 4. A second frustum 6 is provided at the top end of the connection block 5. The top of the second frustum 6 is fixedly connected to the bottom end of the second bridge pier 3 by bolts. An annular sleeve 7 is rotatably connected to the outer wall of the connection block 5, and the top end of the first bridge pier 2 and the bottom end of the second bridge pier 3 both extend into the annular sleeve 7. Rubber rings 34 are fixedly connected to the top and bottom of the annular sleeve 7 by bolts, and the inner walls of the two rubber rings 34 are respectively in contact with the outer walls of the first bridge pier 2 and the second bridge pier 3.

[0053] A plurality of third bolts 45 and first bolts 8 are respectively arranged annularly on the outer wall of the annular sleeve 7. One end of the third bolt 45 penetrates through the second bridge pier 3 and is threadedly connected to the second frustum 6. One end of the first bolt 8 penetrates through the first bridge pier 2 and is threadedly connected to the first frustum 4. An annular groove 9 is provided in the connection block 5. A bevel gear ring 10 is fixedly connected to the top inner wall of the annular groove 9. A rotating shaft 11 is rotatably connected in the annular sleeve 7. One end of the rotating shaft 11 extends into the annular groove 9 and is fixedly connected to a bevel gear 12, and the bevel gear 12 meshes with the bevel gear ring 10. A hexagonal groove 43 is provided at the other end of the rotating shaft 11. A first stabilizing assembly for increasing the stability between the connection block 5 and the second frustum 6 is provided on the top of the connection block 5. A second stabilizing assembly for further increasing the fastening between the second frustum 6 and the connection block 5 is provided in the connection block 5. A fixing assembly for simultaneously increasing the connection between the first bridge pier 2, the first frustum 4 and the connection block 5 is provided at the bottom of the connection block 5. Annular grooves 14 are provided at one ends of the second bridge pier 3 and the first bridge pier 2 that are close to each other. A friction plate 33 is fixedly connected to the inner wall of the annular groove 14 on the side away from the connection block 5 by bolts. Annular slider blocks 13 are slidably connected to the top and bottom of the connection block 5, and the sides of the annular slider blocks 13 away from the connection block 5 extend into the annular grooves 14 and are in contact with the friction plates 33. When the first frustum 4 and the second frustum 6 squeeze the connection block 5, the connection block 5 can be easily rotated through the cooperation between the annular slider blocks 13 and the annular grooves 14.

[0054] A first material injection hole 35 communicating with the circular groove 27 is provided in the second frustum 6. A second material injection hole 36 is provided in the connecting block 5. A plurality of circular holes 37 are provided in the cylindrical block 16. Concrete is poured into the circular groove 27 through the first material injection hole 35 to fill the circular groove 27. Concrete is poured into the first frustum 4 through the second material injection hole 36. The concrete enters the lower part of the cylindrical block 16 through the circular holes 37, so that the first bridge pier 2, the second bridge pier 3, the first frustum 4, the connecting block 5 and the second frustum 6 can be connected into a whole, preventing the first bridge pier 2 and the second bridge pier 3 from loosening.

[0055] In the present invention, the first stabilizing assembly includes a fixed platform 23 fixedly connected to the top of the connecting block 5 by bolts. A circular groove 27 is provided at the bottom of the second frustum 6. Two symmetric triangular blocks 24 extending into the circular groove 27 are slidably connected to the top of the fixed platform 23. The same slide bar 25 slidably penetrates between the two triangular blocks 24. A second spring 26 is sleeved on the outer wall of the slide bar 25, and the two ends of the second spring 26 are fixedly connected to the two triangular blocks 24 respectively. When the second frustum 6 touches the top of the connecting block 5, the two triangular blocks 24 move towards the middle under the action of the circular groove 27, and the second spring 26 is compressed until the triangular blocks 24 can completely enter the circular groove 27. At this time, the triangular blocks 24 slide towards both sides under the elastic force of the second spring 26, and the bottom of the triangular blocks 24 can touch the inner wall of the bottom of the circular groove 27, thereby increasing the fixing property of the connecting block 5 and the second frustum 6 and making the connection between the second frustum 6 and the connecting block 5 tighter.

[0056] In the present invention, the second stabilizing assembly includes a first annular sliding groove 28 provided in the connecting block 5. A second annular sliding groove 31 is provided at the bottom of the second frustum 6. An annular slider 29 extending into the second annular sliding groove 31 is slidably connected in the first annular sliding groove 28. A plurality of third springs 44 are fixedly connected to the inner wall of the bottom of the first annular sliding groove 28. The top ends of the third springs 44 are fixedly connected to the bottom of the annular slider 29. An external thread 30 is provided on the outer wall of the annular slider 29, and an internal thread 32 threadedly connected to the external thread 30 is provided on the inner wall of the second annular sliding groove 31.

[0057] In the present invention, the fixing component includes a screw rod 15 fixedly connected to the bottom of the connecting block 5 by bolts, and the bottom end of the screw rod 15 extends into the first frustum 4. A cylindrical block 16 is threadedly sleeved on the outer wall of the screw rod 15 and slidably extends into the first frustum 4. A plurality of through holes 19 are annularly arranged in the first frustum 4. A trapezoidal block 17 slidably connected in the through hole 19 and in contact with the cylindrical block 16 is provided. A plurality of clamping grooves 18 are annularly arranged on the inner wall of the first pier 2, and the clamping grooves 18 are engaged with the trapezoidal block 17. A plurality of sliding grooves 20 are annularly arranged on the inner wall of the first frustum 4. A wedge-shaped block 22 slidably connected in the sliding groove 20 is provided. One end of the wedge-shaped block 22 away from the screw rod 15 is fixedly connected with a plurality of first springs 21, and the other end of the first spring 21 is fixedly connected with one side inner wall of the sliding groove 20. By driving the bevel gear 12 to drive the bevel gear ring 10, the connecting block 5 and the screw rod 15 to rotate, the cylindrical block 16 slides downward under the action of the screw rod 15. The cylindrical block 16 can push the trapezoidal block 17 to slide outward, and then the trapezoidal block 17 can be clamped into the clamping groove 18 to increase the stability of the first frustum 4 and the first pier 2. When the cylindrical block 16 moves downward a certain distance, the wedge-shaped block 22 moves toward the middle under the elastic force of the first spring 21 after losing the block of the cylindrical block 16. At this time, the bottom of the wedge-shaped block 22 can be in contact with the top end of the cylindrical block 16, thereby increasing the fastening property of the connecting block 5 and the first frustum 4.

[0058] In the present invention, an annular block 38 fixedly sleeved on the outer wall of the annular slider 29 is located in the first annular sliding groove 28. The top inner wall of the first annular sliding groove 28 is fixedly connected by bolts with a stop block 39 matched with the annular block 38. The cooperation of the annular block 38 and the stop block 39 can prevent the annular slider 29 from disengaging from the first annular sliding groove 28.

[0059] In the present invention, a shielding piece 41 is provided on one side of the annular sleeve 7. One side of the shielding piece 41 close to the bevel gear 12 is fixedly connected by bolts with a hexagonal block 40 matched with the hexagonal groove 43. A plurality of second bolts 42 are arranged in the shielding piece 41, and the other end of the second bolt 42 is threadedly connected with the annular sleeve 7. The hexagonal block 40 is inserted into the hexagonal groove 43, and the shielding piece 41 and the annular sleeve 7 are fixed by the second bolts 42 to prevent the rotating shaft 11 and the bevel gear 12 from loosening during an earthquake.

[0060] The advantages of the second embodiment compared with the first embodiment are as follows: A shielding piece 41 is provided on one side of the annular sleeve 7. One side of the shielding piece 41 close to the bevel gear 12 is fixedly connected by bolts with a hexagonal block 40 matched with the hexagonal groove 43. A plurality of second bolts 42 are arranged in the shielding piece 41, and the other end of the second bolt 42 is threadedly connected with the annular sleeve 7.

[0061] A construction method for a self-resetting energy-dissipating connection structure for prefabricated assembled piers includes the following steps:

[0062] S1. Place the annular sleeve 7 and the connecting block 5 over the top of the first frustum 4. The cylindrical block 16 can extend into the first frustum 4. Then hoist the second pier 3 into the annular sleeve 7 and make the bottom end of the second frustum 6 touch the top of the connecting block 5. At this time, the annular sliders 13 at the top and bottom of the connecting block 5 can extend into the annular grooves 14 in the second frustum 6 and the first frustum 4 respectively. Tighten a plurality of first bolts 8 and third bolts 45. Through the first bolts 8 and third bolts 45, the annular sleeve 7 can be fixed to the first pier 2, the second pier 3, the first frustum 4 and the second frustum 6 respectively, increasing the stability of the annular sleeve 7, the connecting block 5, the first pier 2, the second pier 3, the first frustum 4 and the second frustum 6;

[0063] S2. When the top of the second frustum 6 touches the connecting block 5, the two triangular blocks 24 move towards the middle under the action of the circular grooves 27, and the second spring 26 is compressed until the triangular blocks 24 can completely enter the circular grooves 27. At this time, the triangular blocks 24 slide towards both sides under the elastic force of the second spring 26, and the bottom of the triangular blocks 24 can touch the inner wall of the bottom of the circular grooves 27, thereby increasing the fixity of the connecting block 5 and the second frustum 6;

[0064] S3. Then insert a hexagonal wrench (not shown in the figure) into the hexagonal groove 43 and drive the rotating shaft 11 and the bevel gear 12 to rotate through the hexagonal wrench. The bevel gear 12 is threadedly connected to the bevel gear ring 10. The bevel gear 12 drives the bevel gear ring 10 and the connecting block 5 to rotate. Since the cylindrical block 16 slides and extends into the first frustum 4, as the connecting block 5 drives the screw rod 15 to rotate, the cylindrical block 16 threadedly connected to the screw rod 15 slides downward. The cylindrical block 16 can push the trapezoidal block 17 to slide outward, and then the trapezoidal block 17 can be clamped into the clamping groove 18 to increase the stability of the first frustum 4 and the first pier 2. Since the cylindrical block 16 extended into the first frustum 4 before, the wedge-shaped block 22 is squeezed into the sliding groove 20. When the cylindrical block 16 moves downward a certain distance, the wedge-shaped block 22 moves towards the middle under the elastic force of the first spring 21 after losing the block of the cylindrical block 16. At this time, the bottom of the wedge-shaped block 22 can touch the top of the cylindrical block 16, thereby increasing the fastening property of the connecting block 5 and the first frustum 4;

[0065] S4. When the second frustum 6 moves downward, the second frustum 6 pushes the annular slider 29 downward, and the third spring 44 starts to be compressed. The top of the annular slider 29 can extend into the second annular sliding groove 31 for a short distance. As the connecting block 5 drives the annular slider 29 to rotate, the internal thread 32 and the external thread 30 are threadedly connected. Therefore, the annular slider 29 slides upward into the second annular sliding groove 31 to increase the fastening property of the second frustum 6 and the connecting block 5;

[0066] S5. Pour concrete into the circular groove 27 through the first material injection hole 35 to fill the circular groove 27. Pour concrete into the first frustum 4 through the second material injection hole 36. The concrete enters below the cylindrical block 16 through the circular hole 37, thereby enabling the connection of the first pier 2, the second pier 3, the first frustum 4, the connecting block 5, and the second frustum 6 into a whole, preventing the loosening of the first pier 2 and the second pier 3. Then, insert the hexagonal block 40 into the hexagonal groove 43 and fix the shielding piece 41 to the annular sleeve 7 through the second bolt 42 to avoid the loosening of the rotating shaft 11 and the bevel gear 12 during an earthquake.

[0067] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the spirit and scope of the present technical solution, and they should all be covered within the scope of the claims of the present invention.

Claims

1. A self-resetting energy-absorbing connection structure for prefabricated assembled bridge piers, comprising a first bridge pier (2) located in a foundation pit (1) and a second bridge pier (3) located above the first bridge pier (2), characterized in that: The top of the first bridge pier (2) is fixedly connected to a first truncated platform (4), the top of the first truncated platform (4) is provided with a connecting block (5) and a second truncated platform (6) fixedly connected to the bottom of the second bridge pier (3) in sequence, the outer wall of the connecting block (5) is rotatably connected to an annular sleeve (7), and the top of the first bridge pier (2) and the bottom of the second bridge pier (3) both extend into the annular sleeve (7), the outer wall of the annular sleeve (7) is respectively annularly arranged with a plurality of third bolts (45) and first bolts (8), one end of the third bolt (45) passes through the second bridge pier (3) and is threadedly connected to the second truncated platform (6), one end of the first bolt (8) passes through the first bridge pier (2) and is threadedly connected to the first truncated platform (4), an annular groove (9) is provided in the connecting block (5), A bevel gear ring (10) is fixedly connected to the inner wall of the top of the annular groove (9); one end of a rotating shaft (11) rotatably connected in the annular sleeve (7) extends into the annular groove (9) and is fixedly connected to a bevel gear (12), and the bevel gear (12) is meshed with the bevel gear ring (10); a hexagonal groove (43) is provided at the other end of the rotating shaft (11); a first stabilizing component for increasing the stability of the connecting block (5) and the second truncated cone (6) is provided at the top of the connecting block (5); a second stabilizing component for further increasing the tightness of the second truncated cone (6) and the connecting block (5) is provided in the connecting block (5); and a fixing component for simultaneously increasing the connection between the first pier (2), the first truncated cone (4) and the connecting block (5) is provided at the bottom of the connecting block (5).

2. The self-resetting energy-dissipating connection structure according to claim 1, characterized in that: The first stabilizing component comprises a fixed platform (23) fixedly connected to the top of the connecting block (5); a circular groove (27) is provided at the bottom of the second circular platform (6); two symmetrical triangular blocks (24) extending into the circular groove (27) are slidably connected to the top of the fixed platform (23); a same sliding rod (25) slides through the two triangular blocks (24); a second spring (26) is sleeved on the outer wall of the sliding rod (25); and two ends of the second spring (26) are respectively fixedly connected to the two triangular blocks (24).

3. The self-resetting energy-dissipating connection structure according to claim 2, characterized in that: The second stabilizing component comprises a first annular groove (28) arranged in the connecting block (5), a second annular groove (31) is arranged at the bottom of the second truncated table (6), an annular slider (29) is slidably connected in the first annular groove (28) and extends into the second annular groove (31), a plurality of third springs (44) are fixedly connected to the inner wall of the bottom of the first annular groove (28), the top of the third spring (44) is fixedly connected to the bottom of the annular slider (29), an outer wall of the annular slider (29) is provided with an external thread (30), and an inner wall of the second annular groove (31) is provided with an internal thread (32) threadedly connected to the external thread (30).

4. The self-resetting energy-dissipating connection structure according to claim 3, characterized in that: The fixing assembly comprises a screw rod (15) fixedly connected to the bottom of the connecting block (5), and the bottom end of the screw rod (15) extends into the first truncated cone (4); the outer wall of the screw rod (15) is threadedly sleeved with a cylindrical block (16) which slides and extends into the first truncated cone (4); a plurality of through holes (19) are annularly provided in the first truncated cone (4); a trapezoidal block (17) which contacts the cylindrical block (16) is slidably connected in the through holes (19); a plurality of clamping grooves (18) are annularly provided in the inner wall of the first pier (2), and the clamping grooves (18) are engaged with the trapezoidal block (17); a plurality of sliding grooves (20) are annularly provided in the inner wall of the first truncated cone (4), and a wedge block (22) is slidably connected in the sliding groove (20); a plurality of first springs (21) are fixedly connected to one end of the wedge block (22) away from the screw rod (15), and the other end of the first spring (21) is fixedly connected to the inner wall of one side of the sliding groove (20).

5. The self-resetting energy-dissipating connection structure according to claim 4, characterized in that: An annular groove (14) is provided at one end of the second bridge pier (3) and the first bridge pier (2) that are close to each other, a friction plate (33) is fixedly connected to the inner wall of the annular groove (14) on a side away from the connecting block (5), and an annular slider (13) is slidably connected to the top and bottom of the connecting block (5), and the side of the annular slider (13) away from the connecting block (5) extends into the annular groove (14) and contacts the friction plate (33).

6. The self-resetting energy-dissipating connection structure according to claim 2, characterized in that: A first injection hole (35) communicating with the circular groove (27) is provided in the second truncated cone (6), a second injection hole (36) is provided in the connecting block (5), and a plurality of circular holes (37) are provided in the cylindrical block (16).

7. The self-resetting energy-dissipating connection structure according to claim 3, characterized in that: The outer wall of the annular sliding block (29) is fixedly sleeved with a circular ring block (38) located in the first annular sliding groove (28), and the top inner wall of the first annular sliding groove (28) is fixedly connected with a stopper (39) matched with the circular ring block (38).

8. The self-resetting energy-dissipating connection structure according to claim 1, characterized in that: The top and bottom of the annular sleeve (7) are both fixedly connected with rubber rings (34), and the inner walls of the two rubber rings (34) are in contact with the outer walls of the first bridge pier (2) and the second bridge pier (3) respectively.

9. The self-resetting energy-dissipating connection structure according to claim 5, characterized in that: A shielding sheet (41) is provided on one side of the annular sleeve (7); a hexagonal block (40) matching the hexagonal groove (43) is fixedly connected to the shielding sheet (41) on one side close to the bevel gear (12); a plurality of second bolts (42) are provided in the shielding sheet (41); and the other ends of the second bolts (42) are threadedly connected to the annular sleeve (7).

10. A construction method using the self-resetting energy-dissipating connection structure according to claim 9, characterized in that: The following steps are involved: S1, the annular sleeve (7) and the connecting block (5) are covered on the top of the first truncated cone (4), the cylindrical block (16) is extended into the first truncated cone (4), and then the second pier (3) is hoisted into the annular sleeve (7), and the bottom end of the second truncated cone (6) is made to touch the top of the connecting block (5), at this time, the annular sliders (13) at the top and bottom of the connecting block (5) can extend into the annular grooves (14) in the second truncated cone (6) and the first truncated cone (4), respectively, and a plurality of first bolts (8) and third bolts (45) are tightened; S2. When the second truncated cone (6) touches the top of the connecting block (5), the two triangular blocks (24) move toward the middle under the action of the circular groove (27), and the second spring (26) is compressed until the triangular block (24) can completely enter the circular groove (27). At this time, the triangular block (24) slides to both sides under the elastic force of the second spring (26), and the bottom of the triangular block (24) can touch the bottom inner wall of the circular groove (27); S3. Then, the hexagonal wrench is inserted into the hexagonal groove (43). The hexagonal wrench drives the rotating shaft (11) and the bevel gear (12) to rotate. The bevel gear (12) and the bevel gear ring (10) are threadedly connected. The bevel gear (12) drives the bevel gear ring (10) and the connecting block (5) to rotate. As the cylindrical block (16) slides and extends into the first truncated table (4), as the connecting block (5) drives the screw rod (15) to rotate, the cylindrical block (16) threadedly connected to the screw rod (15) slides downward, and the cylindrical block (16) can The trapezoidal block (17) can be pushed to slide outward, and then the trapezoidal block (17) can be inserted into the slot (18). Because the cylindrical block (16) has previously extended into the first truncated cone (4), the wedge block (22) is pressed into the sliding slot (20). When the cylindrical block (16) moves downward for a certain distance, the wedge block (22) loses the obstruction of the cylindrical block (16) and moves toward the middle under the elastic force of the first spring (21). At this time, the bottom of the wedge block (22) can touch the top of the cylindrical block (16). S4. When the second truncated table (6) moves downward, the second truncated table (6) pushes the annular slider (29) to move downward, the third spring (44) begins to compress, and the top of the annular slider (29) can extend a short distance into the second annular groove (31). As the connecting block (5) drives the annular slider (29) to rotate, the internal thread (32) and the external thread (30) are threadedly connected, so that the annular slider (29) slides upward into the second annular groove (31); S5. Concrete is poured into the circular groove (27) through the first injection hole (35) to fill the circular groove (27), and concrete is poured into the first truncated cone (4) through the second injection hole (36). The concrete enters the bottom of the cylindrical block (16) through the circular hole (37). Then, the hexagonal block (40) is inserted into the hexagonal groove (43), and the shielding sheet (41) is fixed to the annular sleeve (7) by the second bolt (42).

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