Damping structure for damping pile group bearing platform and damping pile group bearing platform foundation

Abstract

The utility model provides a shock-absorbing structure and a shock-absorbing group pile cap foundation for a shock-absorbing group pile cap, and relates to the technical field of pile caps, the shock-absorbing structure comprises a support disc, the lower end of the support disc is provided with a first ring groove with a downward opening, the first ring groove and the support disc are coaxially arranged, and the support disc is used for connecting a central pile foundation; the elastic damping ring is coaxially arranged at the groove bottom of the first ring groove; the inner ring is arranged in the first ring groove, and the upper end of the inner ring slidably abuts against the lower end of the elastic damping ring in the horizontal direction; the elastic pieces are arranged in the first annular groove and evenly distributed in the circumferential direction of the supporting disc, each elastic piece comprises a plurality of elastic piece units arranged at intervals in the vertical direction, the elastic piece units extend in the radial direction of the supporting disc, one end of each elastic piece unit is fixedly connected with the supporting disc, and the other end of each elastic piece unit is fixedly connected with the inner ring. And the inner ring and the supporting disc are coaxially arranged under the action of the elastic piece. The bearing platform has the technical effect that the bearing platform can be conveniently reset after an earthquake.

Description

Technical Field

[0001] The utility model relates to the technical field of pile caps, and in particular to a shock-absorbing structure for a shock-absorbing group pile cap and a shock-absorbing group pile cap foundation. Background Art

[0002] In recent years, pile foundations have been widely used in bridge projects. my country's bridge seismic design specifications require that pile foundations maintain an elastic working state during earthquakes. According to traditional practices, this is nothing more than increasing the reinforcement and using more concrete pouring. When encountering earthquake disasters, the seismic effect of this structure is not very good.

[0003] In the prior art, for example, Chinese patent publication number CN106351217A discloses a self-resetting multi-dimensional shock-absorbing pipe pile group foundation and a construction method. Shock-absorbing supports are arranged between the outer PHC pipe piles and the pedestal. The shock-absorbing supports are fixed to the pile heads of the outer PHC pipe piles. The shock-absorbing supports are used to consume seismic energy in the horizontal and vertical directions. A shock-absorbing ground anchor is provided under the central PHC pipe pile. The shock-absorbing ground anchor includes a shear damper and an anchor rod. The shear damper and the anchor rod are anchored in the soil below the bottom surface of the central pipe pile. The shock-absorbing ground anchor is connected to the pedestal via a steel cable inside the central pipe pile. The shock-absorbing ground anchor is used for vertical shock absorption. Combining the improved shock-absorbing bearings and shock-absorbing anchors and applying them to pipe pile group foundations can effectively absorb the horizontal and vertical vibration energy of the reciprocating motion of the pile group foundation during an earthquake, achieve a multi-dimensional shock-absorbing effect, and form a pile-cap connection node with ductile energy absorption capacity, thereby reducing the risk of seismic failure of the pipe pile heads due to dislocation, pull-out, steel bar yielding, etc. under strong earthquakes.

[0004] However, in the above structure, individual peripheral PHC piles are connected to the pedestal through shock-absorbing bearings. During an earthquake, the relative positions of the dispersed peripheral PHC piles are prone to change, causing the force distribution between each peripheral PHC pile and the pedestal to also change, making it difficult to reset the pedestal after the earthquake. Utility Model Content

[0005] The technical problem to be solved by the present application is that the relative positions of the outer pipe piles are easily changed by earthquakes, which makes it difficult to reset the pedestal after the earthquake. In order to overcome the defects of the above-mentioned existing technologies, the present application provides a shock-absorbing structure for a shock-absorbing group pile pedestal and a shock-absorbing group pile pedestal foundation.

[0006] In a first aspect, the present application provides a shock-absorbing structure for a shock-absorbing pile cap, comprising:

[0007] The support plate has a first annular groove with an opening facing downward at its lower end, the first annular groove is coaxially arranged with the support plate, and the support plate is used to connect to the central pile foundation;

[0008] an elastic shock-absorbing ring, coaxially arranged at the bottom of the first ring groove;

[0009] an inner ring, used for fixedly connecting a plurality of peripheral piles, the inner ring being disposed in the first ring groove, the upper end of the inner ring being slidably abutted against the lower end of the elastic shock-absorbing ring in a horizontal direction; and

[0010] Several groups of elastic members are arranged in the first annular groove and are evenly distributed along the circumference of the support disk. Each group of elastic members includes several elastic member units arranged at vertical intervals. The elastic member units extend radially along the support disk. One end of the elastic member unit is fixedly connected to the support disk and the other end is fixedly connected to the inner ring. In the initial state, the inner ring remains coaxial with the support disk under the action of the elastic members.

[0011] Compared with the existing technology, the shock-absorbing structure for the shock-absorbing pile foundation of the present application has the following advantages: the multiple shock-absorbing structures uniformly distributed along the circumference of the central pile in the existing technology are changed into an integral annular shock-absorbing structure, which makes it more convenient for the shock-absorbing structure to connect several peripheral piles at the same time to improve the integrity of the peripheral piles, so that the relative positions of each peripheral pile are not easily changed during an earthquake, and it is convenient for the foundation to be reset after the earthquake.

[0012] In a possible embodiment, a plurality of groups of dampers are provided in the first annular groove and are evenly distributed along the circumference of the support plate. Each group of dampers includes a plurality of damper units arranged at vertical intervals. The damper units extend radially along the support plate. One end of the damper unit is pivotally connected to the support plate and the other end is pivotally connected to the inner ring.

[0013] Compared with the existing technology, the damper using the above technical solution can better dissipate the energy generated by the earthquake than the compression spring, so as to reduce the swing amplitude of the bridge during the earthquake, thereby making the bridge less likely to collapse and better achieving shock absorption.

[0014] In a possible embodiment, the number of groups of the elastic members and the number of groups of the dampers correspond one-to-one to the peripheral piles, the elastic members, the dampers and the peripheral piles are arranged correspondingly along the radial direction of the support plate, the elastic members are arranged on the inner side of the inner ring, and the dampers are arranged on the outer side of the inner ring.

[0015] Compared to existing technologies, this technical solution effectively utilizes the support provided by the outer piles, making the inner ring less susceptible to deformation or even damage during earthquakes, thereby extending the service life of the shock-absorbing structure. Furthermore, the damper and elastic member are located on either side of the outer piles, minimizing interference during an earthquake and preventing the inner ring from colliding with the support plate, further extending the service life of the shock-absorbing structure.

[0016] In a possible implementation, the damper is a hydraulic damper, and the elastic member is a helical compression spring.

[0017] In a possible implementation, the elastic shock-absorbing ring includes a plurality of lead rubber rings stacked vertically, and inner and outer circumferential walls of the lead rubber rings are in contact with inner and outer circumferential walls of the first ring groove.

[0018] Compared with the prior art, the above technical solution enables the lead rubber ring and the support plate to be coaxially arranged, so that the lead rubber ring can provide the support plate with an upward supporting force that is evenly distributed in the circumferential direction, so that the support plate can return to a horizontal state after an earthquake.

[0019] In a possible embodiment, a second ring groove with an opening facing downward is provided at the lower end of the inner ring. The second ring groove is coaxial with the inner ring and is used for inserting a concrete connecting ring.

[0020] Compared with the existing technology, the above technical solution can facilitate the fixed connection between the concrete connecting ring and the inner ring.

[0021] In a second aspect, the present application provides a shock-absorbing pile cap foundation, comprising:

[0022] The center pile foundation includes a center pile extending vertically;

[0023] A peripheral pile foundation, comprising a plurality of peripheral piles evenly distributed in a circular shape around the central pile; and

[0024] In the shock-absorbing structure for the shock-absorbing pile cap described above, the support plate is fixedly connected to the upper end of the central pile and is coaxially arranged with the central pile, and the inner ring is fixedly connected to the upper ends of several peripheral piles.

[0025] Compared with the existing technology, the shock-absorbing pile group foundation of the present application has the following advantages: the multiple shock-absorbing structures uniformly distributed along the circumference of the central pile in the existing technology are changed into an integral annular shock-absorbing structure, and several peripheral piles are connected at the same time through the inner ring, thereby improving the integrity of the peripheral piles, making it difficult for the relative positions of each peripheral pile to change during an earthquake, so as to facilitate the resetting of the foundation after the earthquake.

[0026] In a possible embodiment, the peripheral pile foundation also includes a concrete connecting ring, which is fixedly connected to the upper ends of several of the peripheral piles and is coaxially arranged with the circular ring formed by several of the peripheral piles. The lower end of the inner ring is provided with a second ring groove with an opening facing downward. The concrete connecting ring is arranged in the second ring groove and has an interference fit with the inner ring.

[0027] Compared to existing technologies, this technical solution allows for a more secure connection of the peripheral piles via the concrete connecting ring, improving the integrity of the peripheral pile foundation and making the relative positions of the peripheral piles less susceptible to shifting due to earthquakes. Furthermore, compared to directly connecting the concrete connecting ring to the lower end of the inner ring, inserting the concrete connecting ring into the second ring groove facilitates operation and provides a more secure connection, making the connection between the inner ring and the concrete connecting ring less susceptible to deformation or even damage due to shear forces generated during earthquakes.

[0028] In a possible embodiment, the center pile foundation also includes a first pedestal and several center pile auxiliary piles, and the several center pile auxiliary piles are evenly distributed along the circumference of the center pile. The first pedestal is fixedly connected to the upper ends of the center pile and the several center pile auxiliary piles. The support plate is provided with a central through hole running through the upper and lower parts. Several structural steel bars extending radially are connected to the inner peripheral wall of the central through hole. The first pedestal is cast in the central through hole.

[0029] Compared with the existing technology, the above technical solution can achieve a fixed connection between the support plate and the central pile foundation, which is convenient to construct and has a firm and stable connection. The setting of the central auxiliary pile further strengthens the central pile foundation.

[0030] In a possible implementation, the central pile foundation further includes a second pedestal, the second pedestal is connected to the upper end of the first pedestal, and the second pedestal covers the upper side of the support plate.

[0031] Compared with the prior art, the above technical solution prevents the support plate from directly contacting the bridge, thereby protecting the support plate and making it less likely to be damaged by corrosion or collision with foreign objects. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 A schematic cross-sectional view of a shock-absorbing structure for a shock-absorbing pile group cap according to Example 1 of the present application;

[0033] Figure 2 This is a structural schematic diagram of a shock-absorbing pile cap foundation according to Example 2 of the present application;

[0034] Figure 3 A bottom view of a shock-absorbing pile cap foundation according to Example 2 of the present application;

[0035] Figure 4 This is a schematic structural diagram of the peripheral pile foundation of an embodiment of the present application;

[0036] Figure 5 This is a schematic structural diagram of the central pile foundation of an embodiment of the present application.

[0037] Description of reference numerals:

[0038] 10. Shock-absorbing structure; 11. Support plate; 111. First annular groove; 112. Center through hole; 113. Structural steel bar; 114. Reinforcement ring; 12. Inner ring; 121. Second annular groove; 122. Guide surface; 13. Elastic shock-absorbing ring; 14. Damper; 141. Damper unit; 15. Elastic member; 151. Elastic member unit; 16. Elastic waterproof layer; 20. Peripheral pile foundation; 21. Peripheral pile; 22. Concrete connecting ring; 30. Center pile foundation; 31. Center pile; 32. First pedestal; 33. Center pile auxiliary pile; 34. Second pedestal. DETAILED DESCRIPTION

[0039] First, those skilled in the art should understand that these embodiments are merely used to explain the technical principles of the embodiments of the present application and are not intended to limit the scope of protection of the embodiments of the present application. Those skilled in the art may adjust them as needed to suit specific application scenarios.

[0040] In the description of the embodiments of this application, it should be noted that, unless otherwise specified or limited, the terms "connected" and "connection" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium. Those skilled in the art will understand the specific meanings of the above terms in the embodiments of this application based on the specific circumstances.

[0041] In the embodiments of the present application, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Furthermore, a first feature being "above," "above," and "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0042] The present application will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0043] Example 1

[0044] See also Figure 1 , the embodiment of the present application discloses a shock-absorbing structure for a shock-absorbing pile cap.

[0045] See also Figure 1 The shock-absorbing structure 10 for the shock-absorbing pile cap of this embodiment includes a support plate 11 , an inner ring 12 , an elastic shock-absorbing ring 13 and an elastic member 15 .

[0046] The support plate 11 is used to connect to the central pile foundation 30. The support plate 11 is coaxially arranged with the central pile foundation 30. The support plate 11 is provided with a first annular groove 111 with an opening facing downward. The first annular groove 111 is coaxially arranged with the support plate 11. The elastic shock-absorbing ring 13 is provided at the bottom of the first annular groove 111. Here, the bottom of the first annular groove 111 refers to the top of the first annular groove 111. The elastic shock-absorbing ring 13 is coaxially arranged with the support plate 11 to provide the support plate 11 with a uniformly distributed upward support force in the circumferential direction. The inner and outer circumferential walls of the elastic shock-absorbing ring 13 are respectively in contact with the inner and outer circumferential walls of the first annular groove 111, so that the elastic shock-absorbing ring 13 can remain coaxial with the support plate 11. The elastic shock-absorbing ring 13 is used for vertical shock absorption to dissipate the vertical energy transmitted to the foundation by the earthquake. The elastic shock-absorbing ring 13 can be composed of a number of lead-core rubber rings stacked vertically, or it can be composed of a number of rubber rings and hard metal rings stacked vertically. The hard metal can be lead or steel. In the embodiment of the present application, the elastic shock-absorbing ring 13 is introduced as being composed of a number of lead-core rubber rings stacked vertically.

[0047] The inner ring 12 is disposed within the first annular groove 111 and is coaxially arranged with the support plate 11. The upper end of the inner ring 12 abuts the lower end of the elastic shock-absorbing ring 13, and the inner ring 12 can slide horizontally relative to the elastic shock-absorbing ring 13. The inner ring 12 is used to simultaneously connect multiple peripheral piles 21, thereby improving the integrity of the peripheral piles 21 and preventing their relative positions from shifting during an earthquake, thereby facilitating the repositioning of the foundation after the earthquake. Several groups of elastic members 15 are disposed within the first annular groove 111 and evenly distributed along the circumference of the support plate 11. Each group of elastic members 15 includes a plurality of vertically spaced elastic member units 151. The elastic members 15 are helical compression springs, one end of each elastic member unit 151 being welded to the support plate 11 and the other end being welded to the inner ring 12. In the initial state, the inner ring 12 remains coaxial with the support plate 11 under the action of the elastic member 15; when an earthquake occurs, the support plate 11 moves horizontally relative to the inner ring 12 under the action of the energy transmitted by the earthquake, and the elastic member 15 dissipates the horizontal energy transmitted to the base by the earthquake through continuous expansion and contraction.

[0048] When the energy transmitted to the support plate 11 by the earthquake is dissipated by the coil compression spring, because the coil compression spring dissipates energy through its own elastic deformation and has a weak energy dissipation capacity, the pedestal is prone to large swing amplitudes and long swing durations during earthquakes, and the pedestal and bridge are easily damaged by large swing amplitudes and long swing durations. Based on this, the first annular groove 111 is also provided with a plurality of groups of dampers 14 evenly distributed along the circumference of the support plate 11. Each group of dampers 14 includes a plurality of damper units 141 arranged at vertical intervals. The dampers 14 extend radially along the support plate 11. One end of the damper unit 141 is pivotally connected to the support plate 11, and the other end of the damper unit 141 is pivotally connected to the inner ring 12. The dampers 14 can be liquid dampers 14 or gas dampers 14. In this embodiment, the dampers 14 are preferably hydraulic dampers 14.

[0049] The number of groups of dampers 14 and the number of groups of elastic members 15 correspond one-to-one to the number of peripheral piles 21. The dampers 14, elastic members 15 and peripheral piles 21 are arranged correspondingly along the radial direction of the support plate 11, that is, the dampers 14, elastic members 15 and peripheral piles 21 are located on the same radial straight line of the support plate 11. The corresponding dampers 14 and elastic members 15 can be located on the inner side or outer side of the inner ring 12 at the same time, or can be located on the inner and outer sides of the inner ring 12 respectively. In this embodiment, the dampers 14 and elastic members 15 are located on the inner and outer sides of the inner ring 12 respectively as an example. Preferably, the elastic member 15 is located on the inner side of the inner ring 12, and the damper 14 is located on the outer side of the inner ring 12. The dampers 14 and elastic members 15 are located on the inner and outer sides of the inner ring 12, respectively, preventing them from interfering with each other when dissipating earthquake energy transmitted to the foundation. Furthermore, the elastic members 15 and dampers 14 separate the support plate 11 from the inner ring 12, preventing the inner ring 12 from colliding with the support plate 11. Furthermore, the dampers 14, elastic members 15, and peripheral piles 21 are arranged radially corresponding to the support plate 11, effectively utilizing the peripheral piles' reinforcement and support for the inner ring 12. This prevents the inner ring from deforming or even being damaged during earthquakes, thereby extending the service life of the shock-absorbing structure.

[0050] The outer wall of the support plate 11 is further provided with a plurality of reinforcement rings 114 , which correspond to the damper units 141 , so that the connection between the damper units 141 and the support plate 11 is not easily deformed or even damaged due to insufficient structural strength during an earthquake.

[0051] An elastic waterproof layer 16 is also provided at the lower end of the support plate 11. The elastic waterproof layer 16 is used to close the gap formed between the support plate 11 and the inner ring 12. The elastic waterproof layer 16 can undergo elastic deformation with the relative movement of the support plate 11 and the inner ring 12, so that the damper unit 141 and the elastic member unit 151 are not easily in contact with external water, thereby improving the service life of the elastic member unit 151 and the damper unit 141.

[0052] In summary, the operating principle of the shock-absorbing structure for the shock-absorbing pile cap of the above embodiment is as follows: During an earthquake, the structure above the cap generates a large inertial force on the cap, which in turn causes the support plate 11 and inner ring 12 to produce a horizontal relative displacement. This horizontal relative displacement causes the damper 14 and elastic member 15 on one side to be tensile, and the damper 14 and elastic member 15 on the other side to be compressed. During the continuous transmission of the cyclic load of the earthquake, the damper 14 will cyclically stretch and compress according to the transmitted force, thereby achieving the purpose of dissipating the seismic energy. The elastic shock-absorbing ring 13 dissipates the vertical seismic load energy through the elastic deformation of the rubber of the lead rubber ring and the collision of the lead core. As the large bending moment is transmitted, because the two ends of the damper 14 are respectively pivotally connected to the support plate 11 and inner ring 12, a relative rotation angle is generated between the support plate 11 and inner ring 12, causing the damper 14 to change from horizontal to inclined, which also cooperates with the elastic shock-absorbing ring 13 to dissipate the vertical seismic load energy. When the earthquake weakens or even ends, the elastic shock-absorbing ring 13 cooperates with the elastic member 15 to restore the cap and its superstructure and the pile foundation to their initial relative positions.

[0053] Example 2

[0054] See also Figures 1 to 5 , the embodiment of the present application discloses a shock-absorbing pile cap foundation.

[0055] See also Figure 1 and Figure 2 The shock-absorbing pile group foundation of this embodiment includes a shock-absorbing structure 10 for the shock-absorbing pile group foundation, a peripheral pile foundation 20 and a central pile foundation 30.

[0056] The shock-absorbing structure 10 for a shock-absorbing pile cap includes a support plate 11, an inner ring 12, an elastic shock-absorbing ring 13, an elastic member 15, and a damper 14. The specific structure of the shock-absorbing structure 10 for a shock-absorbing pile cap is as described in Example 1 and will not be repeated here.

[0057] See also Figure 1 、 Figure 2 and Figure 3 The peripheral pile foundation 20 includes a plurality of peripheral piles 21 embedded in the soil. The peripheral piles 21 are evenly arranged in a circular ring along the circumference of the central pile foundation 30. The peripheral piles 21 can be concrete pipe piles or solid concrete piles. The peripheral piles 21 can be directly connected to the inner ring 12, for example, by directly fixing the pile head steel bars at the upper ends of the peripheral piles 21 to the inner ring 12, or by providing connection holes corresponding to the peripheral piles 21 at the lower ends of the inner ring 12, and inserting the peripheral piles 21 into the connection holes to achieve an interference fit with the inner ring 12. However, such a configuration places high demands on the structural strength of the inner ring 12. Insufficient structural strength of the inner ring 12 can easily cause the connection between the inner ring 12 and the peripheral piles 21 to deform or even be damaged due to radial shear force during an earthquake.

[0058] Further, see Figure 1 and Figure 4 To strengthen the structural strength of the connection between the inner ring 12 and the peripheral piles 21, the peripheral piles 21 further include a concrete connection ring 22. The concrete connection ring 22 is fixed to the upper ends of several peripheral piles 21. The concrete connection ring 22 and the circular ring formed by the peripheral piles 21 are coaxially arranged. The concrete connection ring 22 is cast from concrete, and the pile head reinforcement at the upper ends of the peripheral piles 21 are anchored into the concrete connection ring 22. The concrete connection ring 22 is coaxially arranged with the inner ring 12 and is fixedly connected to it. The concrete connection ring 22 can be directly fixed to the underside of the inner ring 12 or inserted into the inner ring 12. In this embodiment, the concrete connection ring 22 is inserted into the inner ring 12 as an example. The inner ring 12 is provided with a second annular groove 121 with an opening facing downward. The second annular groove 121 is coaxially arranged with the inner ring 12. The concrete connecting ring 22 can be inserted into the second annular groove 121 and has an interference fit with the inner ring 12. The concrete connecting ring 22 inserted into the inner ring 12 can better withstand the radial force during an earthquake, so that the connection between the concrete connecting ring 22 and the shock-absorbing structure 10 is not easily damaged due to radial shear force.

[0059] Continue to see Figure 1 and Figure 4 In order to facilitate the insertion of the concrete connecting ring 22 into the second annular groove 121, the second annular groove 121 is provided with guide surfaces 122 on the inner and outer walls at the opening. The guide surfaces 122 are arranged in an annular shape, and the distance between the two guide surfaces 122 gradually increases from top to bottom to facilitate the alignment of the concrete connecting ring 22 with the second annular groove 121 and guide the concrete connecting ring 22 to be inserted into the second annular groove 121.

[0060] See also Figure 1 and Figure 5 The center pile foundation 30 includes a center pile 31 extending vertically. The center pile 31 is coaxially arranged with the support plate 11. The upper end of the center pile 31 is fixedly connected to the support plate 11 to improve the toughness and stability of the shock-absorbing pile cap foundation.

[0061] To facilitate the connection between the support plate 11 and the center pile 31 and ensure a secure connection, the center pile foundation 30 also includes a first cap 32. The support plate 11 is provided with a central through-hole 112 extending vertically therethrough. The first cap 32 is cast and formed within the central through-hole 112. The first cap 32 is fixedly connected to the upper end of the center pile 31. The pile head reinforcement at the upper end of the center pile 31 is anchored into the first cap 32, and the upper surface of the first cap 32 is flush with the upper surface of the support plate 11. Several structural steel bars 113 are welded to the inner circumferential wall of the central through-hole 112 and anchored into the first cap 32, further securing the connection between the support plate 11 and the first cap 32.

[0062] The center pile foundation 30 also includes a number of center pile auxiliary piles 33, which are evenly distributed along the circumference of the center pile 31. The center pile auxiliary piles 33 are located on the lower side of the first pedestal 32. The pile head steel bars at the upper ends of the center pile auxiliary piles 33 are anchored in the first pedestal 32. The center pile auxiliary piles 33 further reinforce the center pile foundation 30 on the basis of the center pile 31.

[0063] The central pile foundation 30 also includes a second cap 34, which is cast above the first cap 32. The second cap 34 is cylindrical and coaxial with the first cap 32. It abuts the upper end of the support plate 11 and has a diameter no smaller than the outer diameter of the support plate 11. The second cap 34 prevents the support plate 11 from directly contacting the bridge, thus protecting it from direct force and making it less susceptible to rust or damage from collisions with foreign objects.

[0064] In summary, the operating principle of the shock-absorbing pile cap foundation of the above embodiment is as follows: During an earthquake, the structure above the cap generates a large inertial force on the cap, which in turn causes the support plate 11 and inner ring 12 to undergo horizontal relative displacement. This horizontal relative displacement causes the damper 14 and elastic member 15 on one side to be tensile, and the damper 14 and elastic member 15 on the other side to be compressed. During the continuous transmission of the earthquake's cyclic load, the damper 14 and elastic member 15 will cyclically stretch and compress according to the transmitted force, thereby achieving the purpose of dissipating seismic energy. The elastic shock-absorbing ring 13 dissipates the vertical seismic load energy through the elastic deformation of the rubber of the lead rubber ring and the collision of the lead core. As the large bending moment is transmitted, because the two ends of the damper 14 are respectively pivotally connected to the support plate 11 and inner ring 12, a relative rotation angle is generated between the support plate 11 and inner ring 12, causing the damper 14 to change from horizontal to inclined, which also cooperates with the elastic shock-absorbing ring 13 to dissipate the vertical seismic load energy. When the earthquake weakens or even ends, the elastic shock-absorbing ring 13 cooperates with the elastic member 15 to restore the support plate and its upper structure and the pile foundation to their initial relative positions.

[0065] By connecting several peripheral piles 21 at the same time through the concrete connecting ring 22, the integrity of the peripheral piles 21 is improved, and the peripheral piles 21 can be prevented from being broken by being subjected to a large tensile force in an instant; the concrete connecting ring 22 is inserted into the second ring groove 121 and connected to the inner ring 12, which optimizes the deformation capacity of the junction area between the base and the peripheral piles 21, and can avoid the situation where the junction of the pile head and the base is damaged due to shear force.

[0066] In the description of the embodiments of the present application, it should be noted that in the description of the present application, terms such as "inside" and "outside" indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings. This is only for the convenience of description and does not indicate or imply that the device or component must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present application.

[0067] In the description of the present application, the description with reference to the terms "one embodiment", "some embodiments", "in the present embodiment", "specific example", or "some examples" means that the specific features, mechanisms, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, mechanisms, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and the features of different embodiments or examples, unless they are contradictory.

[0068] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present application should be included in the scope of protection of the present application. Therefore, the scope of protection of the present application should be based on the scope of protection of the claims.

Claims

1. A shock-absorbing structure for a shock-absorbing pile cap, characterized in that: include: A support plate (11) is provided at its lower end with a first annular groove (111) with its opening facing downward, the first annular groove (111) is coaxially arranged with the support plate (11), and the support plate (11) is used to connect to a central pile foundation (30); an elastic shock-absorbing ring (13) coaxially arranged at the bottom of the first annular groove (111); an inner ring (12) for fixedly connecting a plurality of peripheral piles (21), the inner ring (12) being disposed in the first ring groove (111), the upper end of the inner ring (12) being slidably abutted against the lower end of the elastic shock-absorbing ring (13) in a horizontal direction; and A plurality of groups of elastic members (15) are arranged in the first annular groove (111) and are evenly distributed along the circumference of the support disk (11). Each group of the elastic members (15) includes a plurality of elastic member units (151) arranged at intervals along the vertical direction. The elastic member units (151) extend along the radial direction of the support disk (11). One end of the elastic member unit (151) is fixedly connected to the support disk (11) and the other end is fixedly connected to the inner ring (12). In an initial state, the inner ring (12) maintains a coaxial arrangement with the support disk (11) under the action of the elastic members (15).

2. The shock-absorbing structure for a shock-absorbing pile cap according to claim 1, characterized in that: A plurality of groups of dampers (14) are uniformly distributed along the circumference of the support disc (11) in the first annular groove (111), and each group of dampers (14) includes a plurality of damper units (141) arranged at intervals along the vertical direction. The damper units (141) extend radially along the support disc (11), and one end of the damper unit (141) is pivotally connected to the support disc (11) and the other end is pivotally connected to the inner ring (12).

3. The shock-absorbing structure for a shock-absorbing pile cap according to claim 2, characterized in that: The number of groups of the elastic members (15) and the number of groups of the dampers (14) correspond to the peripheral piles (21) one by one. The elastic members (15), the dampers (14) and the peripheral piles (21) are arranged correspondingly along the radial direction of the support plate (11). The elastic members (15) are arranged on the inner side of the inner ring (12), and the dampers (14) are arranged on the outer side of the inner ring (12).

4. The shock-absorbing structure for a shock-absorbing pile cap according to claim 2, characterized in that: The damper (14) is a hydraulic damper (14), and the elastic member (15) is a helical compression spring.

5. The shock-absorbing structure for a shock-absorbing pile cap according to claim 1, characterized in that: The elastic damping ring (13) comprises a plurality of lead rubber rings stacked vertically, wherein the inner and outer peripheral walls of the lead rubber rings are in contact with the inner and outer peripheral walls of the first ring groove (111).

6. The shock-absorbing structure for a shock-absorbing pile cap according to claim 1, characterized in that: The lower end of the inner ring (12) is provided with a second annular groove (121) with an opening facing downwards. The second annular groove (121) is coaxially arranged with the inner ring (12). The second annular groove (121) is used for inserting a concrete connecting ring (22).

7. A shock-absorbing pile cap foundation, characterized in that: include: A central pile foundation (30) includes a central pile (31) extending vertically; A peripheral pile foundation (20) comprises a plurality of peripheral piles (21) uniformly distributed in a circular shape along the circumference of the central pile (31); and The shock-absorbing structure (10) for the shock-absorbing pile cap according to claim 1, wherein the support plate (11) is fixedly connected to the upper end of the center pile (31) and is coaxially arranged with the center pile (31), and the inner ring (12) is fixedly connected to the upper ends of several of the outer piles (21).

8. The shock-absorbing pile cap foundation according to claim 7, characterized in that: The peripheral pile foundation (20) further comprises a concrete connecting ring (22), wherein the concrete connecting ring (22) is fixedly connected to the upper ends of the plurality of peripheral piles (21) and is coaxially arranged with the circular ring formed by the plurality of peripheral piles (21); the lower end of the inner ring (12) is provided with a second annular groove (121) with an opening facing downward; the concrete connecting ring (22) is arranged in the second annular groove (121) and is interference-fitted with the inner ring (12).

9. The shock-absorbing pile cap foundation according to claim 7, characterized in that: The central pile foundation (30) further comprises a first cap (32) and a plurality of central pile auxiliary piles (33), wherein the plurality of central pile auxiliary piles (33) are evenly distributed along the circumference of the central pile (31), the first cap (32) is fixedly connected to the upper ends of the central pile (31) and the plurality of central pile auxiliary piles (33), the support plate (11) is provided with a central through hole (112) extending vertically, the inner peripheral wall of the central through hole (112) is connected to a plurality of structural steel bars (113) extending radially, and the first cap (32) is cast in the central through hole (112).

10. The shock-absorbing pile cap foundation according to claim 9, characterized in that: The central pile foundation (30) further includes a second support platform (34), wherein the second support platform (34) is connected to the upper end of the first support platform (32), and the second support platform (34) covers the upper side of the support plate (11).

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