Damping support for bridge-tunnel joint and tunnel bridge system

Abstract

The utility model relates to the technical field of tunnel and bridge damping structures, and discloses a damping support for a bridge and tunnel joint and a tunnel and bridge system. The damping support is used for being arranged between a bridge deck slab and a bridge abutment and comprises an adsorption assembly used for being adsorbed to the lower surface of the bridge deck slab in a vacuum mode and swinging in a self-adaptive mode along with the bridge deck slab; the first rigid supporting assembly is in sealed connection with the adsorption assembly and used for forming rigid supporting; the second rigid supporting assembly is arranged on the periphery of the first rigid supporting assembly and used for being fixedly connected with the bridge abutment and forming rigid supporting; the self-adaptive elastic buffer layer is arranged between the first rigid supporting assembly and the second rigid supporting assembly and used for enabling the first rigid supporting assembly and the second rigid supporting assembly to generate micro displacement in a self-adaptive mode and reducing impact pressure generated when vibration occurs. The shock-absorbing support can adapt to shock-absorbing energy consumption in the transverse direction, the longitudinal direction, the angular direction and the like and is suitable for shock-absorbing supporting of supports of various bridges, tunnels and pressure-bearing structures.

Description

Technical Field

[0001] The utility model relates to the technical field of tunnel bridge shock-absorbing structures, in particular, to a shock-absorbing support for a bridge-tunnel connection. In addition, the utility model also relates to a tunnel bridge system comprising the shock-absorbing support for a bridge-tunnel connection. Background Art

[0002] The bridge-tunnel connection section is often located at the junction of the bridge and the tunnel. Due to the differences in roadbed, pavement materials, stiffness, etc.; due to differences in strength and expansion and contraction, the vibration amplitudes of the two will be unbalanced during driving, especially for some areas with more complex terrain; due to factors such as strong earthquakes and geological effects, the amplitude imbalance between the two will be aggravated, which can easily cause the deterioration or even failure of the bridge, causing traffic safety problems. Therefore, it is particularly important to carry out seismic reinforcement of the bridge-tunnel connection.

[0003] The bridge-tunnel joint support is a key component of the bridge-tunnel joint, and its functions include:

[0004] (1) Bridge tunnel - deformations such as lateral and vertical displacement angles at both ends caused by live loads on the bridge tunnel (tunnel).

[0005] (2) Adverse stresses within the structure caused by expansion and contraction due to external factors such as temperature and humidity, which lead to failure at the ends of the structure.

[0006] (3) Bridge-tunnel bridges will suffer significant impact and seismic damage under irresistible external forces such as earthquakes and typhoons.

[0007] (4) Traffic safety issues such as “vehicle jumping at the bridge head” caused by inconsistent settlement between the bridge and the tunnel aggravate the structural deterioration of the bridge-tunnel connection.

[0008] In addition, because the bracket is exposed to the air for a long time, the internal metal parts will be affected by factors such as weathering and atmospheric corrosion, and will also be regularly subjected to cold and hot climates. Therefore, metal devices such as springs used for earthquake resistance are prone to rust and aging, and the technical indicators will continue to decline. The durability of the support will be reduced, which can easily lead to accidents. Utility Model Content

[0009] The utility model provides a shock-absorbing support and tunnel bridge system for bridge-tunnel connection, which effectively improves the seismic performance and stability of the bridge structure by combining multiple functions such as adsorption, elasticity, rigid support and buffer layer; it can completely replace the spring-type shock-absorbing energy-consuming structure, and can be adapted to shock-absorbing energy-consuming in various directions such as lateral, longitudinal and angular directions. It solves the technical problem that the key parts of the existing shock-absorbing support and the shock-absorbing part are prone to corrosion and aging, which leads to a gradual decline in technical indicators and easily causes accidents.

[0010] According to one aspect of the utility model, a shock-absorbing bearing for a bridge-tunnel connection is provided, which is used to be arranged between a bridge deck and an abutment, and includes: an adsorption component, which is used to be vacuum-adsorbed on the lower surface of the bridge deck and adaptively swing with the bridge deck; a first rigid support component, which is sealed and connected to the adsorption component, and is used to form a rigid support; a second rigid support component, which is arranged on the periphery of the first rigid support component, and is used to be fixedly connected to the abutment and form a rigid support; an adaptive elastic buffer layer, which is arranged between the first rigid support component and the second rigid support component, and is used to adaptively generate a micro-displacement between the first rigid support component and the second rigid support component and reduce the impact pressure when vibration occurs.

[0011] Furthermore, the adsorption component includes an elastic suction head and a suction cup. The suction cup is located at the adsorption end of the elastic suction head. The suction cup is used to seal and fit with the lower surface of the bridge deck in a ring shape. The connecting end of the elastic suction head is sealed and connected to the first rigid support component.

[0012] Furthermore, the elastic suction head and / or the first rigid support assembly is provided with an air suction port for sucking the inner cavity of the elastic suction head into a vacuum, and a one-way valve is provided on the air suction port.

[0013] Furthermore, a vacuum sensor is provided in the inner cavity of the elastic suction head.

[0014] Furthermore, the first rigid support assembly adopts a support shaft, and the support shaft is used for arrangement with a gap left with the abutment surface.

[0015] Furthermore, the second rigid support assembly adopts a fixed sleeve located at the periphery of the support shaft, the fixed sleeve is used to be fixedly connected to the abutment, and the upper end surface of the fixed sleeve is flush with the upper end surface of the support shaft.

[0016] Furthermore, the adaptive elastic buffer layer adopts a plastic shock-absorbing pad or a rubber shock-absorbing pad.

[0017] Furthermore, the adaptive elastic buffer layer is attached and fixed to the inner wall surface of the fixed sleeve, and / or the adaptive elastic buffer layer is attached and fixed to the outer wall surface of the supporting shaft.

[0018] Furthermore, the adsorption component is in the shape of a cone; and / or the first rigid support component is in the shape of a cylinder, an elliptical cylinder or a polygonal cylinder, and the shape of the second rigid support component matches that of the first rigid support component.

[0019] According to another aspect of the utility model, a tunnel bridge system is also provided, which includes the above-mentioned shock absorbing bearing for the bridge-tunnel connection.

[0020] The utility model has the following beneficial effects:

[0021] The utility model is used for a shock-absorbing support at a bridge-tunnel connection. The first rigid support component and the second rigid support component serve as rigid support members, which are arranged in sequence from the inside to the outside. The first rigid support component and the second rigid support component are connected by an adaptive elastic buffer layer to form a three-layer stacked structure from the inside to the outside. One end of the first rigid support component facing the bridge deck is vacuum-adsorbed on the lower surface of the bridge deck by an adsorption component, and the second rigid support component is fixedly connected to the abutment. When the external environment changes and / or external loads cause relative displacement or vibration between the bridge deck and the abutment, the impact force generated by the displacement and vibration of the bridge deck is transmitted to the first rigid support component, the adaptive elastic buffer layer, and the second rigid support component in sequence via the adsorption component. The adsorption component performs adaptive swinging with the displacement and vibration of the bridge deck and performs the first-level shock absorption and energy consumption by means of the elasticity and vacuum force of the adsorption component. When the generated impact force is too large and exceeds a threshold value, the adsorption component will detach from the bridge deck to avoid the excessive impact force, and then re-adsorb the bridge deck via the impact force, and the cycle continues. Shock absorption and energy consumption are carried out reciprocatingly. On this basis, the impact force is transmitted to the adaptive elastic buffer layer through the first rigid support component for the second level of shock absorption and energy consumption, and finally transmitted to the abutment through the second rigid support component. The stress, impact force and destructive force finally acting on the abutment are relatively small, thereby minimizing the risk. Similarly, the impact force generated by the displacement and vibration of the abutment is transmitted to the adaptive elastic buffer layer through the second rigid support component, and a micro-displacement is adaptively generated to reduce the impact pressure when the displacement and vibration occur, thereby performing the first level of shock absorption and energy consumption, and then transmitted to the adsorption component through the first rigid support component. The adsorption component adaptively swings with the impact force and performs the second level of shock absorption and energy consumption with the help of the elasticity and vacuum force of the adsorption component. When the transmitted impact force is too large and exceeds the threshold, the adsorption component will detach from the bridge deck to avoid the excessive impact force, and then re-adsorb the bridge deck through the impact force, performing shock absorption and energy consumption reciprocatingly, so that the stress, impact force and destructive force finally transmitted to the bridge deck are relatively small, thereby minimizing the risk. The structure is simple. The design of the shock-absorbing bearing effectively improves the seismic performance and stability of the bridge structure by combining multiple functions such as adsorption, elasticity, rigid support and buffer layer. It can completely replace the spring-type shock-absorbing energy-absorbing structure, and can be adapted to shock-absorbing energy absorption in various directions such as lateral, longitudinal and angular directions. It is suitable for use as shock-absorbing support for bearings of various bridges, tunnels and pressure-bearing structures, especially for use as shock-absorbing support at the connection between bridges and tunnels.

[0022] In addition to the above-described purposes, features and advantages, the present invention has other purposes, features and advantages. The present invention will be further described in detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the accompanying drawings:

[0024] Figure 1 This is one of the structural schematic diagrams of a shock-absorbing support used at a bridge-tunnel connection according to a preferred embodiment of the utility model;

[0025] Figure 2 This is the second structural schematic diagram of the shock-absorbing support used at the bridge-tunnel connection according to the preferred embodiment of the utility model.

[0026] Legend:

[0027] 100, bridge deck; 200, abutment; 300, adsorption assembly; 301, elastic suction head; 302, suction cup; 400, first rigid support assembly; 500, second rigid support assembly; 600, adaptive elastic buffer layer; 700, high-strength bolt. DETAILED DESCRIPTION

[0028] The embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. However, the present invention can be implemented in a variety of different ways as defined and covered below.

[0029] Figure 1 This is one of the structural schematic diagrams of a shock-absorbing support used at a bridge-tunnel connection according to a preferred embodiment of the utility model; Figure 2 This is the second structural schematic diagram of the shock-absorbing support used at the bridge-tunnel connection according to the preferred embodiment of the utility model.

[0030] like Figure 1 and Figure 2As shown, the shock-absorbing bearing for the bridge-tunnel connection of this embodiment is used to be arranged between the bridge deck 100 and the abutment 200, and includes: an adsorption component 300, which is used to be vacuum adsorbed on the lower surface of the bridge deck 100 and adaptively swing with the bridge deck 100; a first rigid support component 400, which is sealed and connected to the adsorption component 300 to form a rigid support; a second rigid support component 500, which is arranged on the periphery of the first rigid support component 400, and is fixedly connected to the abutment 200 to form a rigid support; an adaptive elastic buffer layer 600, which is arranged between the first rigid support component 400 and the second rigid support component 500, and is used to adaptively generate a micro-displacement between the first rigid support component 400 and the second rigid support component 500 and reduce the impact pressure when vibration occurs.The utility model is used for a shock-absorbing support at a bridge-tunnel connection. The first rigid support assembly 400 and the second rigid support assembly 500 are arranged in sequence from the inside to the outside as rigid support members. The first rigid support assembly 400 and the second rigid support assembly 500 are connected by an adaptive elastic buffer layer 600 to form a three-layer laminated structure from the inside to the outside. One end of the first rigid support assembly 400 facing the bridge deck 100 is vacuum-adsorbed on the lower surface of the bridge deck 100 by the adsorption assembly 300, and the second rigid support assembly 500 is fixedly connected to the abutment 200. When the external environment changes and / or due to external loads, the first rigid support assembly 400 is connected to the bridge deck 100 by the adaptive elastic buffer layer 600. When relative displacement or vibration occurs between the bridge deck 100 and the abutment 200, the impact force generated by the displacement and vibration of the bridge deck 100 is transmitted to the first rigid support component 400, the adaptive elastic buffer layer 600 and the second rigid support component 500 in sequence through the adsorption component 300, and the adsorption component 300 swings adaptively with the displacement and vibration of the bridge deck 100 and performs the first level of shock absorption and energy consumption with the elasticity and vacuum force of the adsorption component 300. When the impact force generated is too large and exceeds the threshold, the adsorption component 300 will detach from the bridge deck 100 to avoid the excessive impact force, and then re-adjust through the impact force. The newly adsorbed bridge deck 100 is repeatedly subjected to shock absorption and energy consumption. On this basis, the impact force is then transmitted to the adaptive elastic buffer layer 600 via the first rigid support component 400 for the second level of shock absorption and energy consumption, and finally transmitted to the abutment 200 via the second rigid support component 500. The stress, impact force and destructive force finally applied to the abutment 200 are relatively small, thereby minimizing the risk. Similarly, the impact force generated by the displacement and vibration of the abutment 200 is transmitted to the adaptive elastic buffer layer 600 via the second rigid support component 500, and a micro-displacement is adaptively generated to reduce the displacement and vibration. The impact pressure, and then the first level of shock absorption and energy consumption, and then transmitted to the adsorption component 300 through the first rigid support component 400, the adsorption component 300 adaptively swings with the impact force and uses the elasticity and vacuum force of the adsorption component 300 to perform the second level of shock absorption and energy consumption. When the impact force transmitted is too large and exceeds the threshold, the adsorption component 300 will detach from the bridge deck 100 to avoid the excessive impact force, and then re-adsorb the bridge deck 100 through the impact force, and perform shock absorption and energy consumption in a reciprocating cycle, so that the stress, impact force and destructive force finally transmitted to the bridge deck 100 are relatively small, thereby minimizing the risk. The structure is simple, and the design of the shock-absorbing bearing effectively improves the seismic performance and stability of the bridge structure by combining multiple functions such as adsorption, elasticity, rigid support and buffer layer; it can completely replace the spring-type shock absorption and energy consumption structure, and can be adapted to shock absorption and energy consumption in various directions such as transverse, longitudinal and angular directions, and is suitable for the use of shock absorption and support of various bridges, tunnels and pressure-bearing structures, especially for the use of shock absorption and support at the connection between bridges and tunnels.Since the adsorption component 300 is connected to the bridge deck 100 by vacuum adsorption, it can adaptively swing in any direction such as horizontal, vertical, angular, etc., and then use the elastic force of the adsorption component 300 itself and the vacuum adsorption force of the inner cavity to reduce shock and consume energy; when the impact force is too large and exceeds the threshold, although shock reduction and energy consumption can be performed at this time, the force generated is likely to produce huge stress, impact force or destructive force, and then cause damage to the bridge deck 100 or the abutment 200. When the adsorption component 300 is used as the connection method, the adsorption component 300 is separated from the bridge deck 100 because the impact force is too large and exceeds the vacuum adsorption force, thereby avoiding the direct transmission of the impact force exceeding the threshold, and then using the impact force to re-adsorb the bridge deck 100. This method of cyclic shock reduction and energy consumption is better than the traditional spring structure.

[0031] like Figure 1 and Figure 2 As shown, in this embodiment, the adsorption component 300 includes an elastic suction head 301 and a suction cup 302. The suction cup 302 is at the adsorption end of the elastic suction head 301. The suction cup 302 is used to seal and fit with the lower surface of the bridge deck 100 in an annular shape. The connection end of the elastic suction head 301 is sealed and connected to the first rigid support component 400. Optionally, the thickness of the suction cup 302 is greater than the thickness of the elastic suction head 301, so that the suction cup 302 can be stably adsorbed on the surface of the bridge deck 100, and is not easily directly detached due to force, so that the entire support system is relatively stable. The suction cup 302 is sealed and fitted with the lower surface of the bridge deck 100 through an annular shape. By using the principle of vacuum adsorption, it can be firmly fixed on the bridge deck 100 and remain stable even in the case of vibration or movement (within the threshold range); the elastic suction head 301 allows the support to swing adaptively with the bridge deck 100 within a certain range, which helps to alleviate the stress caused by the expansion or bending of the bridge; the connection end of the elastic suction head 301 is sealed and connected to the first rigid support component 400 to form a rigid support to ensure that the bridge has sufficient bearing capacity when subjected to load; the sealed connection between the adsorption component 300 and the first rigid support component 400 can ensure the vacuum degree of the inner cavity and ensure the stability of the structure; overall, the design of this shock-absorbing support effectively improves the seismic resistance and stability of the bridge structure by combining multiple functions such as adsorption, elasticity, rigid support and buffer layer. Optionally, the elastic suction head 301 adopts a rubber suction head. Optionally, the suction cup 302 adopts a rubber suction cup.

[0032] like Figure 1 and Figure 2As shown, in this embodiment, the elastic suction head 301 and / or the first rigid support assembly 400 is provided with an air suction port for vacuuming the inner cavity of the elastic suction head 301, and a one-way valve is provided on the air suction port. The air suction port is used to draw the inner cavity of the elastic suction head 301 into a vacuum state, which enhances the adsorption force between the suction cup 302 and the lower surface of the bridge deck 100, ensures the stability and reliability of the support, and facilitates the adjustment of the vacuum degree of the inner cavity of the elastic suction head 301, thereby better realizing the function of shock absorption and energy consumption; the function of the one-way valve is to only allow air to be drawn out from the inner cavity of the elastic suction head 301, and not allow external air to flow back in, so as to maintain the vacuum state of the inner cavity and avoid the weakening of the adsorption force due to air backflow; the one-way valve can prevent air leakage caused by poor sealing during the air suction process or in normal use, thereby ensuring the long-term effectiveness of the support; maintaining a stable vacuum adsorption state can improve the safety of the support during use and reduce the risk of accidents caused by unreliable adsorption; in summary, the design of the air suction port and the one-way valve is to ensure that the elastic suction head 301 can be effectively adsorbed on the bridge deck 100 while maintaining long-term stability and reliability, which is crucial to the overall performance of the shock-absorbing support.

[0033] like Figure 1 and Figure 2 As shown, in this embodiment, a vacuum sensor is provided in the inner cavity of the elastic suction head 301. The vacuum sensor can monitor the vacuum degree of the inner cavity of the elastic suction head 301 in real time, ensure that the adsorption force of the adsorption component 300 is maintained at the required level, and can monitor abnormal changes in real time to predict risks in advance; the data provided by the vacuum sensor can be used to feedback the controller, and the controller is used to control the operation of the exhaust device (vacuum device) to maintain the required vacuum degree and ensure the stability of the shock-absorbing support; if the vacuum degree drops below the preset threshold and cannot be restored, the vacuum sensor can trigger the early warning mechanism of the controller (such as a buzzer, warning light, etc.), reminding the maintenance personnel to check and maintain, and prevent safety problems caused by insufficient adsorption force; through real-time monitoring and information feedback, the situation of frequent maintenance due to insufficient adsorption force can be reduced, thereby extending the maintenance cycle of the support; the vacuum sensor ensures that the support can maintain the required adsorption force under various environmental conditions, thereby improving the reliability and durability of the support. Under different bridge use environments and load conditions, the vacuum sensor can help the system to make adaptive adjustments to suit different working conditions; by arranging a vacuum sensor in the inner cavity of the elastic suction head 301, the performance and safety of the shock-absorbing bearing can be greatly improved.

[0034] like Figure 1 and Figure 2As shown, in this embodiment, the first rigid support assembly 400 adopts a support shaft, and the support shaft is used for arrangement with a gap between the support shaft and the abutment 200. A gap is left between the support shaft and the abutment 200 to allow a certain degree of displacement, which helps to absorb and buffer the impact caused by vibration or load changes; the existence of the gap reduces the direct contact between the support shaft and the abutment 200, thereby reducing friction, helping to reduce wear and extend the service life of the bearing; since temperature changes may cause the material to expand or contract, the gap can provide the necessary space to accommodate this thermal expansion and prevent structural stress caused by temperature changes; the gap allows the support shaft to adapt to the slight deformation of the bridge to a certain extent, such as bending and twisting caused by dynamic loads or wind; the gap design of the support shaft increases the flexibility of the bearing, enabling it to better adapt to different bridge movements and load conditions.

[0035] like Figure 1 and Figure 2 As shown, in this embodiment, the second rigid support assembly 500 adopts a fixed sleeve located at the periphery of the support shaft, and the fixed sleeve is used to be fixedly connected to the abutment 200, and the upper end surface of the fixed sleeve is flush with the upper end surface of the support shaft. The fixed sleeve is fixed on the abutment 200, providing a stable connection point, which helps to enhance the stability of the entire shock-absorbing bearing; the upper end surface of the fixed sleeve is flush with the upper end surface of the support shaft, which can ensure that the load is evenly distributed on the support shaft and reduce local stress concentration; the fixed sleeve can provide a sealing effect to prevent external factors such as moisture and dust from invading the connection between the support shaft and the abutment 200, thereby extending the service life of the bearing; the design of the fixed sleeve simplifies the installation process, and the fixed sleeve provides an installation reference surface, which also facilitates maintenance personnel to inspect and maintain the support shaft; the fixed sleeve is fixed on the abutment 200, which can limit the displacement of the support shaft under the action of load and ensure the stability of the bearing; the design of the fixed sleeve allows a close connection between the second rigid support assembly 500 and the abutment 200, while maintaining a certain adaptability to cope with slight deformations of the bridge; the design of the fixed sleeve makes the structure of the entire shock-absorbing bearing more compact, which helps to reduce space occupancy and improve the space utilization under the bridge; the fixed sleeve can protect the support shaft from direct impact and wear from the outside, thereby improving the durability of the bearing. Optionally, the fixing sleeve is fixedly connected to the abutment 200 by a plurality of high-strength bolts 700 arranged at intervals.

[0036] like Figure 1 and Figure 2As shown, in this embodiment, the adaptive elastic buffer layer 600 adopts a plastic shock-absorbing pad or a rubber shock-absorbing pad. The plastic shock-absorbing pad or the rubber shock-absorbing pad has good elasticity and can effectively absorb and reduce the vibration generated by the bridge when it is subjected to dynamic loads (such as vehicle driving, wind, earthquake, etc.); the viscoelastic properties can be used to convert the vibration energy into heat energy or other forms of energy dissipation, thereby reducing the damage to the bridge structure caused by vibration; the plastic shock-absorbing pad or the rubber shock-absorbing pad can adaptively adjust its deformation according to the actual movement and load conditions of the bridge to provide the best shock-absorbing effect; it has good durability and anti-aging performance, can be used for a long time under harsh environmental conditions, reduces maintenance costs, has good resistance to corrosive substances, and is suitable for use under various environmental conditions; the design of the shock-absorbing pad can also provide certain heat insulation and sound insulation effects, reduce heat transfer and noise transmission; the plastic shock-absorbing pad or the rubber shock-absorbing pad is usually light in weight, easy to install and replace, convenient for maintenance work, low in cost, and has a good cost performance ratio; it can adapt to different temperature ranges and keep its performance unaffected.

[0037] like Figure 1 and Figure 2 As shown, in this embodiment, the adaptive elastic buffer layer 600 is attached and fixed to the inner wall surface of the fixed sleeve, and / or the adaptive elastic buffer layer 600 is attached and fixed to the outer wall surface of the support shaft. The selection of the fixed position of the adaptive elastic buffer layer 600 helps to better absorb and disperse the vibration energy and reduce the impact directly transmitted to the bridge structure; the adaptive elastic buffer layer 600 fixed to the inner wall of the fixed sleeve or the outer wall of the support shaft can limit the displacement of the shock-absorbing support and reduce the movement of the shock-absorbing support caused by vibration; the selection of the fixed position of the adaptive elastic buffer layer 600 helps to distribute the load more evenly, reduce local stress concentration, and improve the bearing capacity of the support; the fixing method of the adaptive elastic buffer layer 600 allows the shock-absorbing support to adaptively adjust its position when the bridge undergoes a slight deformation, thereby reducing the impact on the bridge structure; the fixed position of the adaptive elastic buffer layer 600 makes maintenance and replacement more convenient, and maintenance personnel can more easily inspect and replace the shock-absorbing pad. In particular, when the inner wall surface of the fixed sleeve and the outer wall surface of the supporting shaft are both attached and fixed with the adaptive elastic buffer layer 600, the fixed sleeve and the supporting shaft also form a relative friction shock absorption and energy dissipation capacity between the adaptive elastic buffer layer 600 and the adaptive elastic buffer layer 600, further improving the shock absorption and energy dissipation performance of the shock absorbing support and improving the overall stability and safety.

[0038] like Figure 1 and Figure 2As shown, in this embodiment, the adsorption component 300 is in the shape of a cone; and / or the first rigid support component 400 is in the shape of a cylinder, an elliptical cylinder or a polygonal cylinder, and the shape of the second rigid support component 500 matches the first rigid support component 400. The cone-shaped adsorption component 300 can provide a larger contact area, which helps to improve the adsorption force and stability; the cone-shaped adsorption component 300 can be adaptively adjusted according to the curvature of the bridge deck 100 to achieve better sealing and adsorption effects; the first rigid support component 400 in the shape of a cylinder, an elliptical cylinder or a polygonal cylinder can distribute the load more evenly and reduce local stress concentration; the shape of the second rigid support component 500 matches the first rigid support component 400, which helps to achieve a tighter connection and improve the stability of the overall structure; the first rigid support component 400 in the shape of a cylinder or an elliptical cylinder can provide better shock absorption performance because its shape The shape helps to absorb and disperse vibration energy and has a higher load-bearing capacity because its shape helps to transfer loads more efficiently; the first rigid support assembly 400 of the polygonal column may provide additional structural stability, especially when it is necessary to resist lateral forces; the matching shape design simplifies the installation process, making the first rigid support assembly 400 and the second rigid support assembly 500 easier to align and fix, and due to shape matching, wear and damage caused by shape mismatch can be reduced, thereby reducing maintenance requirements; the first rigid support assembly 400 of the cylinder or elliptical cylinder may have a higher load-bearing capacity because its shape helps to transfer loads more efficiently.

[0039] The tunnel bridge system of this embodiment includes the above-mentioned shock absorbing bearing for the bridge-tunnel connection.

[0040] During implementation, a shock-absorbing bearing for the connection between bridges and tunnels is provided, which solves the problem that the metal structure inside the existing bearing is prone to rust and aging and has a short service life. At the same time, the detachable vibration-isolating rubber pad (adaptive elastic buffer layer 600) can be replaced in time according to the degree of damage, which is beneficial for resisting severe cold and hot climate conditions. In addition, the vacuum adsorption technology is used to not only strengthen the fixation between the bridge deck 100 and the shock-absorbing bearing, but also save traditional fixing devices such as bolts, welding, and anchoring, thereby reducing the project cost and improving the cost performance. At the same time, by setting a gap between the support shaft and the fixed sleeve as a buffering displacement reserve when vibration occurs, the risk of brittle failure is reduced by setting a polyethylene shock-absorbing pad (adaptive elastic buffer layer 600).

[0041] The shock-absorbing bearing at the connection between the bridge and the tunnel includes a rubber suction head (elastic suction head 301), a suction cup 302, a support shaft, a fixed sleeve and 10 high-strength bolts 700. The upper part of the suction cup 302 is connected to the bridge deck 100 through the rubber suction head, and the positions of the two are fixed by the vacuum adsorption principle. The lower part of the suction cup 302 is connected to the support shaft, which is the main supporting device in the shock-absorbing bearing. The outside of the support shaft is wrapped by a fixed sleeve, and there is a certain gap between the two, which serves as a buffer displacement reserve when vibration occurs. The top surface of the support shaft and the top surface of the fixed sleeve are located on the same horizontal plane. The inner surface of the fixed sleeve adopts a polyethylene shock-absorbing pad to reduce the impact pressure of the support shaft on the fixed sleeve when vibration occurs. The lower part of the fixed sleeve is connected to the abutment 200 by 10 high-strength bolts 700, and the 10 high-strength bolts 700 are arranged in a circular equidistant manner.

[0042] The working steps are as follows: First, the staff installs the shock-absorbing support to the predetermined position. When the live load of the bridge deck 100 suddenly increases or decreases or an earthquake occurs, the sudden lateral vibration generated at the installation position of the shock-absorbing support will first be transmitted to the rubber suction head and suction cup 302 through the bridge deck 100, and then to the support shaft. The support shaft in the shock-absorbing support will be displaced in the corresponding direction, and the lateral impact force and shear force will be released on the polyethylene shock-absorbing pad in the fixed sleeve. At the same time, the affected suction cup 302 and rubber suction head will also cause the bridge deck 100 to slightly displace, which will not affect the driving comfort and may even be unnoticeable. When the lateral vibration is released, the shock-absorbing support will return to a stable state; and the rubber suction head and suction cup 302 can isolate the support shaft from the outside atmosphere, thereby protecting the function of the support shaft and extending its normal service life. In addition, the rubber suction head and polyethylene shock-absorbing pad are easy to disassemble and replace, so that the testing unit can replace them in time according to their aging degree, thereby greatly improving the service life of the entire shock-absorbing support and ensuring its normal use state and good endurance function.

[0043] The invention has the following beneficial effects: the shock-absorbing bearing used at the bridge-tunnel connection is provided with a suction cup 302, and the vacuum adsorption principle is utilized to strengthen the fixing effect between the shock-absorbing bearing and the bridge deck, and the provision of the suction cup 302 and the rubber suction head isolates the filler inside the support shaft from the outside atmosphere, thereby reducing the influence of the outside environment on the support shaft; the provision of the polyethylene shock-absorbing pad can alleviate the lateral impact force and shear force on the bridge-tunnel connection, so that the bearing can move laterally within the safe displacement range of the provided gap, thereby better protecting the safety of the bridge-tunnel connection section structure and the stability of driving; at the same time, the rubber suction head and the polyethylene shock-absorbing pad are detachable, and engineers can check them on time, or install well-known and commonly used aging detection devices thereon, and perform irregular inspections on them for timely replacement, which is easy to operate and has low cost.

[0044] Matters not covered in this utility model are known technologies.

[0045] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0046] The above-mentioned embodiments only express several implementation methods of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the utility model. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model shall be based on the attached claims.

[0047] The above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A shock-absorbing support for a bridge-tunnel connection, arranged between a bridge deck (100) and a bridge abutment (200), It is characterized in that include: An adsorption assembly (300) is used for vacuum adsorption on the lower surface of the bridge deck (100) and adaptively swinging with the bridge deck (100); A first rigid support component (400) is sealed and connected to the adsorption component (300) to form a rigid support; A second rigid support assembly (500) is disposed outside the first rigid support assembly (400) and is used to be fixedly connected to the abutment (200) and form a rigid support; The adaptive elastic buffer layer (600) is arranged between the first rigid support component (400) and the second rigid support component (500) and is used to adaptively generate a micro displacement between the first rigid support component (400) and the second rigid support component (500) and reduce the impact pressure when vibration occurs.

2. The shock-absorbing support for the bridge-tunnel connection according to claim 1, characterized in that: The adsorption assembly (300) comprises an elastic suction head (301) and a suction cup (302). The suction cup (302) is located at the adsorption end of the elastic suction head (301). The suction cup (302) is used to seal and fit with the lower surface of the bridge deck (100) in an annular shape. The connection end of the elastic suction head (301) is sealedly connected to the first rigid support assembly (400).

3. The shock-absorbing support for the bridge-tunnel connection according to claim 2, characterized in that: The elastic suction head (301) and / or the first rigid support assembly (400) are provided with a suction port for sucking the inner cavity of the elastic suction head (301) into a vacuum. A one-way valve is provided on the air extraction port.

4. The shock-absorbing support for the bridge-tunnel connection according to claim 2, characterized in that: A vacuum sensor is arranged in the inner cavity of the elastic suction head (301).

5. The shock absorbing support for the bridge-tunnel connection according to claim 1, characterized in that: The first rigid support assembly (400) adopts a support shaft, The support shaft is used for arrangement with a gap left between the support shaft and the surface of the abutment (200).

6. The shock-absorbing support for the bridge-tunnel connection according to claim 5, characterized in that: The second rigid support assembly (500) uses a fixed sleeve located outside the support shaft, and the fixed sleeve is used to be fixedly connected to the abutment (200). The upper end surface of the fixed sleeve is flush with the upper end surface of the supporting shaft.

7. The shock absorbing support for the bridge-tunnel connection according to claim 6, characterized in that: The adaptive elastic buffer layer (600) adopts a plastic shock-absorbing pad or a rubber shock-absorbing pad.

8. The shock-absorbing support for the bridge-tunnel connection according to claim 7, characterized in that: The adaptive elastic buffer layer (600) is attached and fixed to the inner wall surface of the fixed sleeve, and / or the adaptive elastic buffer layer (600) is attached and fixed to the outer wall surface of the supporting shaft.

9. The shock absorbing support for a bridge-tunnel connection according to any one of claims 1 to 8, characterized in that: The adsorption component (300) is in a cone shape; and / or The first rigid support component (400) is in the form of a cylinder, an elliptical cylinder or a polygonal cylinder, and the shape of the second rigid support component (500) matches that of the first rigid support component (400).

10. A tunnel bridge system, characterized in that: A shock absorbing bearing for a bridge-tunnel connection comprising the shock absorbing bearing described in any one of claims 1 to 9.

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