An anti-seismic node structure of a fully-assembled high-pile wharf

Abstract

The application relates to an anti-seismic node structure of a full-assembled high-pile wharf, which comprises a prefabricated cross beam, a plurality of groups of prefabricated cross beam tenon and groove are uniformly arranged on the prefabricated cross beam, a plurality of prefabricated beam plate tenon are movably connected with the groups of prefabricated cross beam tenon and groove along a symmetry axis, a prefabricated cover plate is fixedly connected to the prefabricated cross beam, gaps are respectively left between the prefabricated beam plate tenon and the prefabricated cover plate and the prefabricated cross beam tenon and groove, a rolling disc assembly is arranged between the bottom side of the prefabricated beam plate tenon and the prefabricated cross beam, a vibration reduction and isolation structure is arranged between the prefabricated beam plate tenon and the prefabricated cover plate and between the prefabricated beam plate tenon and the prefabricated cross beam tenon and groove, the vibration reduction and isolation structure comprises a plurality of air bag assemblies abutting against the prefabricated beam plate tenon, and the problems that the existing full-assembled wharf still has the problems of the influence of cast-in-place operation quantity on construction efficiency, the dense arrangement of node steel bars which is not conducive to vibration and construction, the weak position of the node which is prone to pressure concentration, and the influence of node fixation on the overall anti-seismic capacity of the wharf are solved.

Description

Technical Field

[0001] This invention relates to the field of seismic isolation technology for fully prefabricated wharves, specifically to a seismic-resistant node structure for a fully prefabricated high-pile wharf. Background Technology

[0002] Fully prefabricated high-pile wharves can be constructed through factory prefabrication and assembly construction, offering advantages such as high construction efficiency, resource conservation, cost reduction, and pollution reduction. They align with current green construction trends and have broad application prospects. Fully prefabricated high-pile wharves typically employ four standard components: prefabricated pile foundations, prefabricated crossbeams, prefabricated beams and slabs, and prefabricated berthing components. These are supplemented by node connections and cast-in-place surface layers to complete the wharf construction. Nodes connect the discrete prefabricated components and transmit internal forces, playing a crucial role in the wharf's structural performance, such as structural stiffness and seismic resistance, and also profoundly influencing the construction methods of fully prefabricated high-pile wharves. Fully prefabricated high-pile wharves typically utilize cast-in-place nodes; for example, prefabricated beams and slabs are connected by cast-in-place upper crossbeams to improve node stiffness, securely connect components, and enhance the overall structural integrity.

[0003] However, a more robust joint is not always better. Related studies have shown that the connection joint between the pile foundation and the superstructure is prone to fracture, torsion and other damage under seismic loads. Related examples show that the precast gantry crane beam end and pile cap of a high-pile wharf are fixedly connected by pre-embedded steel bars and cast-in-place concrete. Under long-term impact loads, more than 90% of the beam end or pile cap will be torn or damaged.

[0004] Therefore, the following defects and hidden dangers exist in connecting the precast beams and precast crossbeams in the fully prefabricated wharf by casting the upper crossbeam in place: (1) There is still a lot of casting work, which violates the concept of prefabricated construction; (2) The reinforcement at the node is relatively dense, which is not conducive to vibration and construction, and the construction quality is not easy to guarantee; (3) Casting work needs to meet basic curing conditions, which has a great impact on construction efficiency; (4) The fixed connection of the node restricts the free displacement and rotation between components, and the seismic resistance is poor. When facing impact loads such as ship collisions and earthquakes, the node is a weak link, which often produces pressure concentration, bears large stress and bending moment, and in severe cases, it will lead to structural damage and cracking, thereby reducing the durability, usability and safety of the fully prefabricated high-pile wharf. Summary of the Invention

[0005] This invention overcomes the shortcomings of existing technologies and provides a seismic-resistant joint structure for a fully prefabricated high-pile wharf. It eliminates the need for on-site casting during construction, enabling construction to be completed through factory prefabrication and on-site assembly, thus meeting the requirements of prefabricated construction. At the same time, while ensuring the good integrity of the structure, it can achieve "flexible" connections between components, providing seismic isolation, energy dissipation, and self-resetting functions. This invention solves the problems of existing fully prefabricated wharves, such as the impact of on-site casting on construction efficiency, the dense layout of joint reinforcement which is not conducive to vibration and construction, the relatively weak joint location which is prone to pressure concentration, and the impact of joint fixed connections on the overall seismic resistance of the wharf.

[0006] To achieve the above objectives, the technical solution adopted by the present invention is as follows: a seismic joint structure for a fully prefabricated high-pile wharf, comprising a prefabricated crossbeam, wherein a number of prefabricated crossbeam tenons are evenly spaced on the prefabricated crossbeam, and multiple prefabricated beam tenons are movably connected to the number of prefabricated crossbeam tenons along the axis of symmetry; a prefabricated cover plate is fixedly connected to the prefabricated crossbeam to prevent the prefabricated beam tenon from shifting significantly; and gaps are left between the prefabricated beam tenon and the prefabricated cover plate and the prefabricated crossbeam tenon.

[0007] A roller assembly is provided between the bottom side of the precast beam tenon and the precast crossbeam to adjust the displacement direction of the precast beam tenon and correct the mortise and tenon connection position between the precast beam tenon and the precast crossbeam. Vibration reduction and isolation structures are respectively provided between the precast beam tenon and the precast cover plate and between the precast beam tenon and the precast crossbeam mortise and tenon.

[0008] The vibration reduction and isolation structure includes several airbag components that abut against the tenons of the precast beam slab.

[0009] In a preferred embodiment of the present invention, the roller assembly includes a ball bearing plate disposed on the tenon of the precast beam, a plurality of balls movably embedded in the ball bearing plate, and a roller plate disposed on the bottom side of the tenon groove of the precast beam corresponding to the ball bearing plate. The roller plate is provided with a plurality of lower grooves for limiting the position of the balls, and the cross section of the lower groove is a smooth curve with the slope angle gradually decreasing synchronously from the midpoint to both sides.

[0010] In a preferred embodiment of the present invention, the airbag assembly includes a first airbag disposed between the tenon of the precast beam and the tenon groove of the precast crossbeam, and a second airbag disposed between the tenon of the precast beam and the precast cover plate. Both the first and second airbags are equipped with safety components and inflation components. The first and second airbags are airtightly connected by an airbag membrane and a base plate. A gas cavity is formed between the airbag membrane and the base plate. Embedded mounting grooves for placing the safety components and inflation components are provided on both sides of the tenon groove of the precast crossbeam. Slots for inserting the base plate are provided on both sides of the embedded mounting grooves. Several sets of interconnected mounting holes are coaxially formed on the base plate and the slots. Pins for fixing the base plate into the slots are provided within the mounting holes.

[0011] In a preferred embodiment of the present invention, the inflation assembly includes an air guide tube A and an air guide tube B, one end of which is connected to the gas cavity. A barometer is provided at the other end of the air guide tube A, and a one-way air inlet valve is provided at the other end of the air guide tube B.

[0012] In a preferred embodiment of the present invention, the safety component includes a cylindrical shell disposed on a base plate and communicating with the gas cavity, a piston movably embedded in the cylindrical shell, and a spring with one end elastically abutting against the piston. The cylindrical shell is closed at one end away from the base plate and open at the other end connected to the base plate. The other end of the spring abuts against the closed end inside the cylindrical shell. A one-way exhaust valve communicating with the inside of the cylindrical shell is disposed on the lower side of the open end of the cylindrical shell.

[0013] In a preferred embodiment of the present invention, a plurality of embedded bolts A for fixing the position of the precast cover plate are provided on the precast crossbeam, and the precast cover plate is provided with embedded bolt holes A corresponding to the embedded bolts A. The precast cover plate is stacked and fixed on the precast crossbeam by the insertion and engagement of the embedded bolts A and the embedded bolt holes A.

[0014] In a preferred embodiment of the present invention, a plurality of pre-embedded bolts B are provided on the lower side of the prefabricated cover plate, which are inserted and matched with the mounting holes.

[0015] In a preferred embodiment of the present invention, the prefabricated cover plate is provided with a plurality of through channels for placing the barometer and the one-way air inlet valve. A perforated ring is movably embedded at the upper opening of the through channel, and a cap that can block the opening end of the through channel is movably embedded on the perforated ring.

[0016] In a preferred embodiment of the present invention, the maximum radius of the lower groove is greater than or equal to the width of the gap between the tenon side surface of the precast beam slab and the tenon side wall of the precast crossbeam, and the depth of the lower groove is greater than or equal to the width of the gap between the upper surface of the tenon of the precast beam slab and the bottom surface of the precast cover plate.

[0017] In a preferred embodiment of the present invention, a cover strip is provided on the upper part of the gap between the precast cover plate, the tenon of the precast beam plate and the precast crossbeam.

[0018] This invention addresses the shortcomings of the prior art, and its beneficial effects are as follows:

[0019] (1) Good seismic isolation performance. Through the coordinated cooperation of precast beam tenons, precast crossbeam tenons, precast cover plates and seismic isolation components, the "flexible" connection of the fully assembled wharf node is achieved. When facing impact loads such as earthquakes, the precast crossbeams and precast beams are allowed to have horizontal and vertical displacements. At the same time as the displacement, good seismic isolation and energy dissipation treatment can be carried out, avoiding damage caused by stress concentration at the connection node. After the impact loads such as earthquakes are completed, the precast beams can be automatically reset under the action of gravity.

[0020] (2) Strong overall stability. Through the coordinated cooperation of precast beam tenons, precast crossbeam tenons, precast cover plates and vibration isolation components, the precast beams can be limited in multiple directions, avoiding excessive displacement between the precast crossbeams and the precast beams. While ensuring that the fully assembled wharf structure has good vibration isolation and self-resetting capabilities, it also takes into account the overall integrity.

[0021] (3) The prefabricated design is excellent. It can be constructed efficiently and greenly by "building blocks". There is no need to pour concrete on site, and it is convenient for later maintenance and replacement. Attached Figure Description

[0022] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0023] Figure 1 This is a schematic diagram of the prefabricated crossbeam in a preferred embodiment of the present invention;

[0024] Figure 2 This is a preferred embodiment of the present invention. Figure 1 A magnified structural diagram at point B;

[0025] Figure 3 This is a cross-sectional structural diagram of the fully assembled dock in a preferred embodiment of the present invention.

[0026] Figure 4 This is a preferred embodiment of the present invention. Figure 3 A magnified structural diagram at point C;

[0027] Figure 5 This is a partial structural schematic diagram of the precast crossbeam tenon groove sidewall on the precast crossbeam in a preferred embodiment of the present invention;

[0028] Figure 6This is a schematic diagram of the structure of the first airbag installed in the pre-embedded mounting groove in a preferred embodiment of the present invention;

[0029] Figure 7 This is a schematic diagram of the structure of the first or second airbag combined with the safety component and the inflation component in a preferred embodiment of the present invention.

[0030] Figure 8 This is a schematic diagram of the structure of the first airbag or the second airbag and safety components when they are combined and installed in a preferred embodiment of the present invention;

[0031] Figure 9 This is a schematic diagram of the structure of the first airbag installed on the prefabricated crossbeam in a preferred embodiment of the present invention;

[0032] Figure 10 This is a schematic diagram of the structure in a preferred embodiment of the present invention, showing the tenon of the precast beam installed on the precast crossbeam;

[0033] Figure 11 This is a schematic diagram of the structure of the second airbag installed on the prefabricated cover plate in a preferred embodiment of the present invention;

[0034] Figure 12 This is another cross-sectional structural diagram of the fully assembled dock in a preferred embodiment of the present invention.

[0035] Figure 13 This is a preferred embodiment of the present invention. Figure 12 A magnified structural diagram at point D;

[0036] Figure 14 This is a schematic diagram of the precast beam tenon structure in a preferred embodiment of the present invention;

[0037] Figure 15 This is a schematic diagram of the structure of the prefabricated cover plate in a preferred embodiment of the present invention;

[0038] Among them, 1. Precast crossbeam; 101. Precast crossbeam tenon; 102. Embedded installation groove; 103. Slot; 104. Installation hole; 105. Embedded bolt A; 2. Precast beam tenon; 201. Ball bearing plate; 202. Ball bearing; 3. Precast cover plate; 301. Embedded bolt hole A; 302. Embedded bolt B; 303. Through hole; 401. Airbag membrane; 402. Base plate; 403. Gas cavity; 404. First airbag; 405. Second airbag; 5. Roller plate; 501. Lower groove; 6. Pin; 7. Air guide tube A; 701. Barometer; 8. Air guide tube B; 801. One-way air intake valve; 9. Cylindrical shell; 10. Piston; 11. Spring; 12. One-way exhaust valve; 13. Perforated ring; 14. Cover; 15. Cover seam strip. Detailed Implementation

[0039] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. These drawings are simplified schematic diagrams, which are only used to illustrate the basic structure of the present invention and therefore only show the components relevant to the present invention.

[0040] It should be noted that if directional indicators (such as up, down, bottom, top, etc.) are involved in the embodiments of the present invention, these directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly. The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, features defined with "first" and "second" may explicitly or implicitly include one or more of that feature. Unless otherwise explicitly specified and limited, the terms "set," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components. For those skilled in the art, the specific meaning of the above terms in the present invention can be understood according to the specific circumstances.

[0041] Example 1

[0042] like Figures 1-15 As shown, a seismic node structure for a fully prefabricated high-pile wharf includes a prefabricated crossbeam 1. Several sets of prefabricated crossbeam tenons 101 are evenly spaced on the prefabricated crossbeam 1. Several sets of prefabricated crossbeam tenons 2 are movably connected to the prefabricated beam tenons 101 along the axis of symmetry. A prefabricated cover plate 3 is fixedly connected to the prefabricated crossbeam 1 to prevent the prefabricated beam tenon 2 from shifting significantly. There are gaps between the prefabricated beam tenon 2 and the prefabricated cover plate 3 and the prefabricated crossbeam tenons 101 respectively.

[0043] A roller assembly is provided between the bottom side of the precast beam tenon 2 and the precast crossbeam 1 to adjust the displacement direction of the precast beam tenon 2 and correct the tenon-mortise connection position between the precast beam tenon 2 and the precast crossbeam mortise 101. Vibration reduction and isolation structures are respectively provided between the precast beam tenon 2 and the precast cover plate 3 and between the precast beam tenon 2 and the precast crossbeam mortise 101.

[0044] The vibration reduction and isolation structure includes several airbag components that abut against the tenon 2 of the precast beam slab.

[0045] Specifically, the prefabricated structure is constructed through the mortise and tenon joints between the prefabricated beam tenon 2 and the prefabricated crossbeam 1, and the fixed connection between the prefabricated crossbeam 1 and the prefabricated cover plate 3. The fixed connection between the prefabricated crossbeam 1 and the prefabricated cover plate 3 effectively restricts the vertical displacement of the prefabricated beam tenon 2. Simultaneously, the connection between the prefabricated beam tenon 2 and the prefabricated crossbeam 1 is an incomplete mortise and tenon joint, allowing for slight displacement of the prefabricated beam tenon 2 itself under impact loads such as ship collisions and earthquakes. The displacement of the prefabricated beam tenon 2 in both horizontal and vertical directions, along with the absorption, transformation, and release of impact loads by the seismic isolation structure, increases the seismic resistance of the prefabricated wharf. The roller assembly installed between the bottom side of the prefabricated beam tenon 2 and the prefabricated crossbeam 1 achieves a "flexible" connection between the nodes in the prefabricated wharf. Furthermore, this "flexible" connection reduces pressure concentration, significantly improving the durability, usability, and safety of the prefabricated high-pile wharf. Meanwhile, the fully prefabricated high-pile wharf can complete the assembly of the overall structure without the need for on-site pouring during the assembly process, which improves construction efficiency.

[0046] Furthermore, such as Figure 2 , Figure 3 , Figure 15 As shown, the precast beam 1 is provided with several embedded bolts A105 for fixing the position of the precast cover plate 3. The precast cover plate 3 is provided with embedded bolt holes A301 corresponding to the embedded bolts A105. The precast cover plate 3 is stacked and fixed on the precast beam 1 by the insertion and mating of the embedded bolts A105 and the embedded bolt holes A301. The fixed connection between the precast beam 1 and the precast cover plate 3 is mainly by threaded fixing. That is, by fitting the embedded bolt holes A301 on the precast cover plate 3 onto the embedded bolts A105 on the precast beam 1, the initial assembly between the precast cover plate 3 and the precast beam 1 is completed. Then, the upper end of the embedded bolt A105 is threaded with a nut for fixing, and the fastening connection between the precast cover plate 3 and the precast beam 1 is completed.

[0047] Furthermore, such as Figure 4 As shown, the roller assembly includes a ball bearing plate 201 set on the tenon 2 of the precast beam, several balls 202 movably embedded in the ball bearing plate 201, and a roller plate 5 set on the bottom side of the tenon groove 101 of the precast beam corresponding to the ball bearing plate 201. The roller plate 5 is provided with several lower grooves 501 for limiting the position of the balls 202. The cross section of the lower grooves 501 is a smooth curve with the slope angle gradually decreasing synchronously from the midpoint to both sides.

[0048] The ball bearing plate 201, fixedly mounted on the tenon 2 of the precast beam slab, and the roller plate 5, fixedly mounted on the bottom side of the tenon groove 101 of the precast crossbeam, are connected by movable balls 202. The mortise and tenon connection between the tenon 2 of the precast beam slab and the tenon groove 101 of the precast crossbeam are determined by the balls 202 abutting against the lower groove 501. Without external interference, a portion of the balls 202 directly abuts against the center of the lower groove 501. A portion of the balls 202 is embedded in the ball bearing plate 201, and a portion abuts against the lower groove 501 on the roller plate 5. A gap exists between the ball bearing plate 201 and the roller plate 5, and a cavity exists between the balls 202 and the ball bearing plate 201. This cavity can be filled with lubricating material to reduce the friction between the balls 202 and the ball bearing plate 201, ensuring that the balls 202 can roll freely. Simultaneously, the cross-section of the lower groove 501 is a smooth curve with a slope that gradually decreases synchronously from the midpoint to both sides. When the precast beam tenon 2 moves horizontally due to the impact load, the precast beam tenon 2 will simultaneously move vertically. When the position of the precast beam tenon 2 shifts, it can abut and squeeze the first airbag 404 and the second airbag 405, so that the airbag 4 can bear part of the impact load on the precast beam tenon 2.

[0049] Meanwhile, in order to prevent the precast beam tenon from dislodging when subjected to impact load, the maximum radius of the lower groove 501 is greater than or equal to the width of the gap between the side surface of the precast beam tenon 2 and the side wall of the precast crossbeam tenon groove 101, and the depth of the lower groove 501 is greater than or equal to the width of the gap between the upper surface of the precast beam tenon 2 and the bottom surface of the precast cover plate 3. By setting the ball bearing plate 201 and the roller plate 5, the horizontal displacement of the precast beam tenon 2 can be effectively restricted.

[0050] Furthermore, such as Figure 3 , Figures 5-7 As shown, the airbag assembly includes a first airbag 404 disposed between the precast beam tenon 2 and the precast crossbeam tenon 101, and a second airbag 405 disposed between the precast beam tenon 2 and the precast cover plate 3. Both the first airbag 404 and the second airbag 405 are equipped with safety components and inflation components. The first airbag 404 and the second airbag 405 are airtightly connected by an airbag membrane 401 and a base plate 402. The airbag membrane 401 and the base plate 402 are connected... A gas cavity 403 is formed by enclosure. The prefabricated crossbeam tenon groove 101 has embedded mounting grooves 102 on both sides for placing safety components and inflation components. The embedded mounting grooves 102 have slots 103 on both sides for inserting the base plate 402. The base plate 402 and the slots 103 are respectively provided with several sets of connected mounting holes 104 on the same axis. The mounting holes 104 are provided with pins 6 for fixing the base plate 402 in the slots 103.

[0051] By setting the slot 103, not only is the installation and fixation of the first airbag 404 facilitated, but it also facilitates subsequent disassembly and replacement. The pre-embedded mounting groove 102 allows for the placement of safety components and inflation components, increasing the space utilization between components. The base plate 402 is fixed in the slot 103 by the pin 6, effectively preventing the first airbag 404 from shifting position. More specifically, the first airbag 404 and the second airbag 405 are rounded cuboids to maximize the contact area with the precast beam tenon 2. The gas cavity 403 has a honeycomb pattern, with adjacent cavities connected to form the gas cavity 403, further increasing the ability of the first airbag 404 and the second airbag 405 to withstand impact loads. Meanwhile, by providing several pre-embedded bolts B302 on the lower side of the precast cover plate 3, which are inserted into the mounting holes 104, the second airbag 405 between the precast cover plate 3 and the precast beam tenon 2 is fixed as the pre-embedded bolts B302 are inserted into the mounting holes 104.

[0052] Furthermore, such as Figure 13 As shown, the inflation assembly includes an air guide tube A7 and an air guide tube B8, one end of which is connected to the gas cavity 403. A pressure gauge 701 is installed at the other end of the air guide tube A7, and a one-way air inlet valve 801 is installed at the other end of the air guide tube B8. The safety assembly includes a cylindrical shell 9 installed on the base plate 402 and connected to the gas cavity 403, a piston 10 movably embedded in the cylindrical shell 9, and a spring 11 with one end elastically abutting against the piston 10. The cylindrical shell 9 is closed at one end away from the base plate 402 and open at the other end connected to the base plate 402. The other end of the spring 11 abuts against the closed end inside the cylindrical shell 9. A one-way exhaust valve 12 connected to the inside of the cylindrical shell 9 is provided on the lower side of the open end of the cylindrical shell 9.

[0053] The air pressure inside the first airbag 404 and the second airbag 405 can be observed by the barometer 701. When the air pressure is insufficient, the air pressure in the gas cavity 403 inside the first airbag 404 and the second airbag 405 can be supplemented by the one-way air intake valve 801. Simultaneously, by incorporating safety components on the first airbag 404 and the second airbag 405, when the first airbag 404 and the second airbag 405 are subjected to a strong impact, if the pressure inside the gas cavity 403 exceeds a set threshold, the piston 10 will be pushed by the air pressure, compressing the spring 11 and moving towards the bottom of the cylindrical shell 9. The movement of the piston 10 connects the gas cavity 403 with the one-way exhaust valve 12, breaking the sealed state of the first airbag 404 and the second airbag 405, allowing high-pressure gas to rush out to the outside through the one-way exhaust valve 12 until the pressure inside the gas cavity 403 is insufficient to push the piston 10, which is elastically supported by the spring 11. At this point, the piston 10 will return to its initial position, and the gas cavity 403 will return to a sealed state. This process repeats continuously, ensuring that the first airbag 404 and the second airbag 405 can withstand multiple impact loads.

[0054] To facilitate manual observation and replenishment of the air pressure in the first airbag 404 and the second airbag 405, such as Figure 7 , Figure 13 As shown, the prefabricated cover plate 3 is provided with several through channels 303 that can accommodate barometers 701 and one-way inlet valves 801. A perforated ring 13 is movably embedded at the upper opening of the through channel 303. A cap 14 is movably embedded on the perforated ring 13 to seal the opening of the through channel 303. Both barometers 701 and one-way inlet valves 801 can be placed in the through channels 303. At the same time, the upper opening of the through channel 303 is sealed by the insertion and cooperation of the perforated ring 13 and the cap 14, which can protect barometers 701 and one-way inlet valves 801 from dust and water intrusion. It also makes it convenient for staff to check the air pressure of the first airbag 404 and the second airbag 405 and replenish the air in time. Meanwhile, to further prevent dust and other impurities from entering the gaps between the tenon of the precast beam slab and the precast cover plate 3, and between the tenon of the precast beam slab 2 and the tenon groove of the precast crossbeam 101, a cover strip 15 is provided on the upper part of the gap between the precast cover plate 3, the tenon of the precast beam slab 2, and the precast crossbeam 1.

[0055] In this first embodiment, the precast cover plate 3, precast crossbeam 1, and precast beam tenon 2 are all steel-concrete composite structures with good seismic performance and construction performance. Meanwhile, the gas filled in the gas cavity 403 of the first airbag 404 and the second airbag 405 is an inert gas, and the airbag membrane 401 is a highly elastic, high-strength, and highly durable material. Furthermore, the cylindrical shell 9, spring 11, embedded mounting groove 102, embedded bolt A105, embedded bolt B302, pin 6, ball bearing plate 201, ball bearing 202, roller plate 5, cover strip 15, and perforated ring 13 are all made of corrosion-resistant, wear-resistant, and high-strength materials; the piston 10 is made of a material with strong sealing performance, low friction coefficient, and corrosion resistance; and the cover 14 is made of a transparent, corrosion-resistant, and high-strength material.

[0056] Example 2

[0057] like Figures 1-15 As shown, an assembly method for a fully prefabricated high-pile wharf is implemented using a seismic-resistant node structure for the fully prefabricated high-pile wharf, including the following steps;

[0058] Step 1: Seal and connect the first airbag 404 (uninflated state) to the safety component and the inflation component respectively. Then, insert the first airbag 404 (uninflated state) and the connected safety component and inflation component into the pre-embedded mounting groove 102 set on the side wall of the prefabricated crossbeam tenon groove 101 from top to bottom. Then, insert the pin 6 into the mounting holes 104 on both sides of the bottom plate 402 of the first airbag 404 (uninflated state) and the mounting holes 104 on both sides of the pre-embedded mounting groove 102 to complete the fixing of the first airbag 404 (uninflated state).

[0059] Step 2: Place the precast beam tenon 2 in the precast crossbeam tenon groove 101. The ball bearings 202 fall on the center of the bottom of the corresponding upper and lower grooves 501 of the roller plate 5 and make contact with them, thus completing the initial tenon-mortise connection between the precast beam tenon 2 and the precast crossbeam tenon groove 101.

[0060] Step 3: After sealing the second airbag 405 (uninflated state) to the safety component and the inflation component respectively, insert the safety component and the inflation component connected to the second airbag 405 (uninflated state) into the through hole 303 on the prefabricated cover plate 3 and fix them in place. At the same time, insert the pre-embedded bolts B302 into the mounting holes 104 on both sides of the bottom plate 402 of the second airbag 405 (uninflated state), and use nuts and washers to fix the second airbag 405 (uninflated state) to the prefabricated cover plate 3.

[0061] Step 4: Place the precast cover plate 3, which is fixedly connected to the second airbag 405 (in the uninflated state), directly above the precast beam tenon 2 and the precast crossbeam tenon 101. Then, connect the precast cover plate 3 to the precast crossbeam 1 by inserting the pre-embedded bolt A105 into the pre-embedded bolt hole A301 of the precast cover plate 3 and by using nuts and washers. After that, install and fix the pressure gauge 701 and the one-way air inlet valve 801, which are connected to the first airbag 404 (in the uninflated state) in the pre-embedded installation groove 102, in the through hole 303.

[0062] Step 5: Inflate the uninflated first airbag 404 (uninflated state) and second airbag 405 (uninflated state) through the one-way air inlet valve 801 in the through-hole 303, and monitor the internal air pressure of the first airbag 404 and second airbag 405 in real time through the barometer 701. Wait until the air pressure reaches the initial air pressure P. 01 P 02 After that, stop inflating, and finally install the hole ring 13 and the cap 14 on the upper end of the through hole 303.

[0063] Furthermore, the initial air pressure of the first airbag 404 and the second airbag 405 in step five is calculated by the following formula:

[0064]

[0065]

[0066]

[0067]

[0068] Among them, P 01 The initial air pressure value, P, is set for the first airbag 404. 02The initial air pressure value for the second airbag 405 is given in Pa; k1 and k2 are reduction factors, where k1 and k2 are used when the desired value is P. 01 When k is k1, and the desired value is P 02 When k is k2, the values ​​of k1 and k2 are both less than 1; M is the mass of the precast beam tenon 2, in kg; a1 is the acceleration of the tenon in the horizontal direction, and a2 is the acceleration of the tenon in the vertical direction, in m / s². 2 A represents the contact area between the precast beam tenon 2 and the first airbag 404 or the second airbag 405, in m². 2 n1 represents the number of first airbags 404 that are simultaneously compressed under impact loads such as earthquakes, and n2 represents the number of second airbags 405 that are simultaneously compressed under impact loads such as earthquakes. P atm The standard atmospheric pressure value represents the maximum non-seismic impact force experienced by the first airbag 404 and the second airbag 405 during operation F1 and F2.

[0069] Furthermore, the activation pressure of the piston 10 and the elastic force of the spring 11 in the safety assembly connected to the first airbag 404 and the second airbag 405 are determined by the following formula:

[0070]

[0071]

[0072] F3=(P1-P atm )πr 2

[0073] F4 = (P2 - P) atm )πr 2

[0074] Wherein, P1 is the starting air pressure of piston 10 in the safety component connected to the first airbag 404, i.e., the set threshold; P2 is the starting air pressure of piston 10 in the safety component connected to the second airbag 405, i.e., the set threshold, in Pa; when the pressure of the gas cavity 403 in the first airbag 404 and the second airbag 405 is greater than the starting air pressures P1 and P2, piston 10 will be pushed by the air pressure; F3 is the elastic force of spring 11 in the safety component connected to the first airbag 404 that abuts against piston 10; F4 is the elastic force of spring 11 in the safety component connected to the second airbag 405 that abuts against piston 10, in N; r is the radius of piston 10; π is pi.

[0075] Working principle: During operation, when the prefabricated wharf is subjected to a small impact load, a small relative displacement occurs between the precast beam tenon 2 and the precast crossbeam tenon 101. At this time, the ball bearing 202 rolls away from its initial position, and the position of the precast beam tenon 2 will rise slightly during the horizontal displacement. At the same time, it will compress the first airbag 404 and the second airbag 405, causing their internal air pressure to rise, but it is lower than the starting air pressure P1 and P2 of the piston 10 in the safety component connected to the first airbag 404 and the second airbag 405. At this time, the first airbag 404 and the second airbag 405 remain in a sealed state. After the small impact load during operation ends, the precast beam tenon 2 will return to its initial position under its own weight. At this time, the ball bearing 202 also returns to its initial position, and the first airbag 404 and the second airbag 405 also rebound to their initial state, and their internal air pressure returns to P1. 01 P 02 Under seismic loading, a large relative displacement occurs between the precast beam tenon 2 and the precast crossbeam tenon 101. At this time, the precast beam tenon 2 will further compress the first airbag 404 and the second airbag 405, and the internal air pressure will continue to rise to P1 and P2. At this time, the piston 10 in the safety component will be pushed by the air pressure and compress the spring 11 to move towards the bottom of the cylindrical shell 9. The movement of the piston 10 connects the gas cavity 403 of the first airbag 404 or the second airbag 405 with the one-way exhaust valve 12, breaking the sealed state of the first airbag 404 or the second airbag 405. The high-pressure gas rushes out to the outside through the one-way exhaust valve 12. After the internal air pressure is lower than P1 and P2, the piston 10 re-seals and blocks the first airbag 404 or the second airbag 405. Under the continuous action of the earthquake, the above process will be repeated. After the impact load such as earthquake ends, the tenon 2 of the precast beam returns to its initial position under its own weight. At this time, the ball bearing 202 also returns to its initial position. The first airbag 404 and the second airbag 405 cannot return to their initial state on their own. The staff can monitor the internal air pressure in a timely manner through the air pressure gauge 701 of the inflation component and replenish it with air through the one-way air inlet valve 801 to restore the internal air pressure to P. 01 and P 02 Under the action of impact loads such as earthquakes, there are three basic energy dissipation methods for seismic joints: (1) As the precast beam tenon 2 is slightly raised, the impact energy is converted into gravitational potential energy; (2) As the precast beam tenon 2 squeezes the first airbag 404 and the second airbag 405, the gas in the gas cavity 403 is compressed, and the impact energy is converted into gas internal energy; (3) When the gas internal energy is too large, the high-pressure gas inside the first airbag 404 and the second airbag 405 will be discharged through the one-way exhaust valve 12, releasing the gas internal energy to the outside.

[0076] Based on the preferred embodiments of the present invention described above, those skilled in the art can make various changes and modifications without departing from the inventive concept. The technical scope of this invention is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A seismic joint structure for a fully prefabricated high-pile wharf, comprising prefabricated crossbeams (1), characterized in that: The precast beam (1) is provided with several sets of precast beam tenons (101) evenly spaced. Several sets of precast beam tenons (101) are connected to multiple precast beam tenons (2) along the axis of symmetry. The precast beam (1) is fixedly connected with a precast cover plate (3) to prevent the precast beam tenon (2) from shifting significantly. There are gaps between the precast beam tenon (2) and the precast cover plate (3) and the precast beam tenon (101). A roller assembly is provided between the bottom side of the precast beam tenon (2) and the precast crossbeam (1) to adjust the displacement direction of the precast beam tenon (2) and correct the tenon-mortise connection position between the precast beam tenon (2) and the precast crossbeam tenon (101). Vibration reduction and isolation structures are respectively provided between the precast beam tenon (2) and the precast cover plate (3) and between the precast beam tenon (2) and the precast crossbeam tenon (101). The vibration reduction and isolation structure includes several airbag components that abut against the tenon (2) of the precast beam slab; The roller assembly includes a ball bearing plate (201) disposed on the tenon (2) of the precast beam, a plurality of balls (202) movably embedded in the ball bearing plate (201), and a roller plate (5) disposed on the bottom side of the tenon groove (101) of the precast beam corresponding to the ball bearing plate (201). The roller plate (5) is provided with a plurality of grooves (501) for limiting the position of the balls (202). The cross section of the grooves (501) is a smooth curve with the slope angle gradually decreasing synchronously from the midpoint to both sides. The airbag assembly includes a first airbag (404) disposed between the precast beam tenon (2) and the precast crossbeam tenon (101), and a second airbag (405) disposed between the precast beam tenon (2) and the precast cover plate (3). Both the first airbag (404) and the second airbag (405) are provided with safety components and inflation components. The first airbag (404) and the second airbag (405) are both airtightly connected by an airbag membrane (401) and a base plate (402). A gas cavity (403) is formed between the airbag membrane (401) and the base plate (402). The safety component includes a cylindrical shell (9) disposed on the base plate (402) and communicating with the gas cavity (403), a piston (10) movably embedded in the cylindrical shell (9), and a spring (11) with one end elastically abutting against the piston (10). The cylindrical shell (9) is closed at one end away from the base plate (402) and open at the other end connected to the base plate (402). The other end of the spring (11) abuts against the closed end inside the cylindrical shell (9). A one-way exhaust valve (12) communicating with the inside of the cylindrical shell (9) is provided on the lower side of the open end of the cylindrical shell (9).

2. The seismic joint structure of a fully prefabricated high-pile wharf according to claim 1, characterized in that: The prefabricated crossbeam tenon groove (101) has embedded mounting grooves (102) on both sides for placing safety components and inflation components. The embedded mounting grooves (102) have slots (103) on both sides for inserting the base plate (402). The base plate (402) and the slots (103) are respectively provided with several sets of connected mounting holes (104) on the same axis. The mounting holes (104) are provided with pins (6) for fixing the base plate (402) in the slots (103).

3. The seismic joint structure of a fully prefabricated high-pile wharf according to claim 2, characterized in that: The inflation assembly includes an air guide tube A (7) and an air guide tube B (8) connected at one end to the gas cavity (403). A barometer (701) is provided at the other end of the air guide tube A (7), and a one-way air inlet valve (801) is provided at the other end of the air guide tube B (8).

4. The seismic joint structure of a fully prefabricated high-pile wharf according to claim 1, characterized in that: The precast beam (1) is provided with a number of embedded bolts A (105) for fixing the position of the precast cover plate (3). The precast cover plate (3) is provided with embedded bolt holes A (301) corresponding to the embedded bolts A (105). The precast cover plate (3) is stacked and fixed on the precast beam (1) by the insertion and cooperation of the embedded bolts A (105) and the embedded bolt holes A (301).

5. The seismic joint structure of a fully prefabricated high-pile wharf according to claim 2, characterized in that: The lower side of the prefabricated cover plate (3) is provided with a number of pre-embedded bolts B (302) that are inserted into the mounting holes (104).

6. The seismic joint structure of a fully prefabricated high-pile wharf according to claim 3, characterized in that: The prefabricated cover plate (3) is provided with several through channels (303) that can hold the barometer (701) and the one-way air inlet valve (801). A perforated ring (13) is movably embedded at the upper opening of the through channel (303), and a cap (14) that can block the opening of the through channel (303) is movably embedded on the perforated ring (13).

7. The seismic joint structure of a fully prefabricated high-pile wharf according to claim 1, characterized in that: The maximum radius of the lower groove (501) is greater than or equal to the width of the gap between the side surface of the precast beam tenon (2) and the side wall of the precast crossbeam tenon (101), and the depth of the lower groove (501) is greater than or equal to the width of the gap between the upper surface of the precast beam tenon (2) and the bottom surface of the precast cover plate (3).

8. The seismic joint structure of a fully prefabricated high-pile wharf according to claim 1, characterized in that: A cover strip (15) is provided on the upper part of the gap between the precast cover plate (3), the precast beam tenon (2) and the precast crossbeam (1).

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