Bridge and tunnel connecting section damping support and bridge and tunnel system
By designing shock absorbing support for multi-stage damping components in the bridge-tunnel connection section, the problem of poor durability of existing support is solved, and more efficient shock absorption and support effects are achieved, ensuring structural stability and safety.
Patent Information
- Application Number
- CN202421906077.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-07
- Publication Date
- 2025-05-23
- Estimated Expiration
- 2034-08-07
AI Technical Summary
The support of the existing bridge-tunnel connection section is difficult to adapt to loads, external forces and deformation in different forms and directions, resulting in poor durability and accelerated structural aging.
A bridge-tunnel connection section shock absorbing support is designed, including a first-stage damping assembly, a second-stage damping assembly and a base arranged in sequence from top to bottom, so as to improve the shock absorbing and support capabilities of the support through multi-stage elastic buffering and energy consumption.
This design significantly improves the durability of the support and the stability and safety of the overall structure, can adapt to loads and external forces in different forms and directions, and extends the service life of the support.
Smart Images
Figure CN222893490U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of vibration-damping structures at the connection between tunnels and bridges, and in particular, to a vibration-damping support for a bridge-tunnel connection section. In addition, the utility model also relates to a bridge-tunnel system comprising the vibration-damping support for a bridge-tunnel connection section. Background Art
[0002] The connecting section of a bridge and a tunnel is usually located in the transition zone between the bridge and the tunnel. Due to the differences in the composition materials, stiffness, strength, expansion and contraction of the roadbed and pavement between the bridge and the tunnel, when a vehicle passes by on the road, the vibration amplitude between the two will also be unbalanced. Especially in areas with complex geological conditions, earthquakes and geological activities may increase the amplitude imbalance between the two, which can easily lead to accelerated aging or even damage of the structure, and then cause accidents. Therefore, the shock absorption treatment of the connecting section of the bridge and the tunnel is very important.
[0003] As an important component of the bridge-tunnel connection structure, the bearing directly affects the service life and structural safety of the bridge. Its functions mainly include four aspects: first, the deformation of the horizontal and vertical displacements and rotations at the ends of the structure caused by the live load on the bridge and tunnel; second, the damage to the ends of the structure caused by adverse structural stresses caused by thermal expansion and contraction caused by environmental factors such as temperature and humidity; third, the huge impact force and vibration destructive force on the bridge and tunnel structure caused by irresistible external forces such as earthquakes and typhoons; fourth, accidents such as "bridge jumping" caused by uneven settlement at the bridge-tunnel connection aggravate the aging and damage of the bridge-tunnel connection structure.
[0004] Existing bearings are difficult to adapt to loads, external forces, and deformations of different forms and directions, and are easily damaged and fail, which greatly reduces the durability of the bearings and leads to frequent abnormal accidents. Utility Model Content
[0005] The utility model provides a bridge-tunnel connection section shock-absorbing support and a bridge-tunnel system, which can adapt to the support under loads of different forms and directions, external forces, and deformation forces, and perform multi-level elastic buffering and energy dissipation, so that the shock absorption and support capabilities of the support are improved, the durability of the support is improved, and the stability and safety of the overall structure supported by the support are ensured. It is suitable for supporting the bridge-tunnel connection section, and is also suitable for supporting other connection areas with large vibrations, deformations, live loads, and environmental changes, so as to solve the technical problem of poor durability of existing supports.
[0006] According to one aspect of the utility model, a bridge-tunnel connecting section shock-absorbing bearing is provided, comprising a first-stage damping assembly, a second-stage damping assembly and a base arranged in sequence from top to bottom; the first-stage damping assembly and the second-stage damping assembly are combined to form a secondary vertical vibration buffering and damping mechanism; the second-stage damping assembly constitutes a main lateral vibration buffering and damping mechanism, and the first-stage damping assembly constitutes an auxiliary lateral vibration buffering and damping mechanism.
[0007] Furthermore, the first-stage damping assembly includes a first pressure plate, a spring damper, a first seismic isolation pad and a second pressure plate; the first pressure plate and the second pressure plate are arranged at intervals, the spring damper and the first seismic isolation pad are arranged between the first pressure plate and the second pressure plate, a plurality of spring dampers are arranged evenly spaced along the circumferential direction, and the first seismic isolation pad is arranged in a closed ring shape on the outer periphery of the spring damper and is spaced apart from the spring damper.
[0008] Furthermore, the second-stage damping assembly includes a second seismic isolation pad, a conical coil spring, a shaft cylinder and a sleeve; the small end of the conical coil spring abuts against the second pressure plate, the large end of the conical coil spring abuts against the base, a plurality of sleeves are evenly spaced along the circumferential direction on the base, the shaft cylinder is arranged at the central axis position of the base, the sleeve and the shaft cylinder are fixedly connected to the base, the outer limit of the large diameter end of the conical coil spring abuts against the sleeve, and the inner side of the conical coil spring cooperates with the shaft cylinder limit.
[0009] Furthermore, limiting holes are provided in the middle of the first pressure plate and the second pressure plate; the shaft cylinder passes through the limiting hole of the second pressure plate and is arranged close to the first pressure plate, or the shaft cylinder passes through the limiting hole of the second pressure plate and the limiting hole of the first pressure plate in sequence and leaves a distance from the upper edge of the first pressure plate.
[0010] Furthermore, the lower end of the sleeve and / or the lower end of the shaft cylinder is anchored in the base.
[0011] Furthermore, lower pier anchor bars are pre-buried in the base, the lower pier anchor bars are arranged in one-to-one correspondence with the sleeves, and the upper ends of the lower pier anchor bars are anchored in the sleeves.
[0012] Furthermore, at least one of the first pressure-bearing plate, the second pressure-bearing plate and the base has a cross-sectional shape of a regular polygon, a circle or an ellipse.
[0013] Furthermore, the shaft cylinder, the first seismic isolation pad and the second seismic isolation pad are all elastic members.
[0014] Furthermore, the first seismic isolation pad and / or the second seismic isolation pad are detachably connected and arranged, and a sensor for detecting damage is provided inside the first seismic isolation pad and / or the second seismic isolation pad.
[0015] According to another aspect of the utility model, a bridge-tunnel system is also provided, which includes the above-mentioned bridge-tunnel connecting section shock-absorbing bearing.
[0016] The utility model has the following beneficial effects:
[0017] The utility model discloses a bridge-tunnel connection section shock-absorbing support, comprising a first-stage damping component, a second-stage damping component and a base arranged in sequence from top to bottom; when a vertical force is received, the force is transmitted in sequence from top to bottom by the first-stage damping component, the second-stage damping component and the base, firstly through the first-stage damping component for first-stage elastic buffering and energy consumption, then through the second-stage damping component for second-stage elastic buffering and energy consumption, and then transmitted to the base after the second-stage elastic buffering and energy consumption, at which time the vertical force and vertical vibration force transmitted through the support are greatly reduced; or the force is transmitted in sequence from bottom to top by the base, the second-stage damping component and the first-stage damping component, firstly through the base to the second-stage damping component for first-stage elastic buffering and energy consumption, then through the first-stage damping component for second-stage elastic buffering and energy consumption, and then after the second-stage elastic buffering and energy consumption, The vertical force and vertical vibration force transmitted through the support are greatly reduced at this time; when receiving horizontal (lateral) force, elastic buffering and energy dissipation are mainly performed through the second-stage damping component, and the first-stage damping component performs auxiliary buffering and energy dissipation at the same time, and the horizontal (lateral) force and horizontal (lateral) vibration force transmitted through the support are greatly reduced at this time; because both the first-stage damping component and the second-stage damping component adopt elastic buffering and energy dissipation, and adopt a three-stage structure, when subjected to angular force and vibration force, elastic buffering and energy dissipation can also be performed; it can adapt to support under loads, external forces, and deformation forces of different forms and directions, and perform multi-level elastic buffering and energy dissipation, so that the shock absorption and support capacity of the support are improved, the durability of the support is improved, and the stability and safety of the overall structure supported by the support are ensured. It is suitable for the support of bridge-tunnel connection sections, and is also suitable for the support of other connection areas with large vibration, deformation, live loads, and environmental changes.
[0018] 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
[0019] 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:
[0020] Figure 1 This is one of the structural schematic diagrams of the bridge-tunnel connection section shock-absorbing support of the preferred embodiment of the utility model;
[0021] Figure 2This is the second structural schematic diagram of the shock-absorbing support of the bridge-tunnel connecting section of the preferred embodiment of the utility model.
[0022] Legend:
[0023] 100, first-stage damping assembly; 101, first pressure plate; 102, spring damper; 103, first seismic isolation pad; 104, second pressure plate; 200, second-stage damping assembly; 201, second seismic isolation pad; 202, conical helical spring; 203, shaft cylinder; 204, sleeve; 300, base; 301, lower pier anchor bar; 400, limit hole. DETAILED DESCRIPTION
[0024] 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.
[0025] Figure 1 This is one of the structural schematic diagrams of the bridge-tunnel connection section shock-absorbing support of the preferred embodiment of the utility model; Figure 2 This is the second structural schematic diagram of the shock-absorbing support of the bridge-tunnel connecting section of the preferred embodiment of the utility model.
[0026] like Figure 1 and Figure 2As shown, the bridge-tunnel connecting section shock-absorbing bearing of this embodiment includes a first-stage damping assembly 100, a second-stage damping assembly 200 and a base 300 arranged in sequence from top to bottom; the first-stage damping assembly 100 and the second-stage damping assembly 200 are combined to form a secondary vertical vibration buffering and damping mechanism; the second-stage damping assembly 200 constitutes a main lateral vibration buffering and damping mechanism, and the first-stage damping assembly 100 constitutes an auxiliary lateral vibration buffering and damping mechanism. The utility model discloses a bridge-tunnel connection section shock-absorbing bearing, comprising a first-stage damping component 100, a second-stage damping component 200 and a base 300 arranged in sequence from top to bottom; when a vertical force is received, the force is transmitted in sequence from top to bottom by the first-stage damping component 100, the second-stage damping component 200 and the base 300, firstly through the first-stage damping component 100 for first-stage elastic buffering and energy consumption, then through the second-stage damping component 200 for second-stage elastic buffering and energy consumption, and then transmitted to the base 300 after the second-stage elastic buffering and energy consumption, at this time, the vertical force and vertical vibration force transmitted through the bearing are greatly reduced; or the base 300, the second-stage damping component 200 and the first-stage damping component 100 are transmitted in sequence from bottom to top, firstly through the base 300 to the second-stage damping component 200 for first-stage elastic buffering and energy consumption, and then through the first-stage damping component 100 for second-stage elastic buffering and energy consumption. Energy is transmitted again after secondary elastic buffering and energy dissipation. At this time, the vertical force and vertical vibration force transmitted through the support are greatly reduced; when receiving horizontal (lateral) force, elastic buffering and energy dissipation are mainly performed through the second-stage damping component 200, and at the same time, the first-stage damping component 100 performs auxiliary buffering and energy dissipation. At this time, the horizontal (lateral) force and horizontal (lateral) vibration force transmitted through the support are greatly reduced; since both the first-stage damping component 100 and the second-stage damping component 200 adopt elastic buffering and energy dissipation, and adopt a three-stage structure, they can also perform elastic buffering and energy dissipation when subjected to angular force and vibration force; it can adapt to supports under loads, external forces, and deformation forces of different forms and directions, and perform multi-level elastic buffering and energy dissipation, so that the shock absorption and support capabilities of the support are improved, the durability of the support is improved, and the stability and safety of the overall structure supported by the support are ensured. It is suitable for supporting bridge-tunnel connection sections, and is also suitable for supporting other connection areas with large vibrations, deformations, live loads, and environmental changes.
[0027] like Figure 1 and Figure 2As shown, in this embodiment, the first-stage damping assembly 100 includes a first pressure plate 101, a spring damper 102, a first seismic isolation pad 103 and a second pressure plate 104; the first pressure plate 101 and the second pressure plate 104 are arranged at intervals, the spring damper 102 and the first seismic isolation pad 103 are arranged between the first pressure plate 101 and the second pressure plate 104, a plurality of spring dampers 102 are arranged evenly spaced along the circumferential direction, and the first seismic isolation pad 103 is arranged in a closed ring shape on the outer periphery of the spring damper 102 and is spaced from the spring damper 102. In the supporting part between the first pressure plate 101 and the second pressure plate 104, a plurality of spring dampers 102 arranged in a circular shape are used as elastic inner supports. Not only each elastic unit body has vertical elastic force (elastic tension, elastic pressure, elastic reset force), but also the elastic forces between the elastic units will constitute mutual constraints and restrictions, thereby achieving the damping effect (buffering and energy dissipation). The first seismic isolation pad 103 is arranged in a closed loop on the periphery of the spring damper 102 as an elastic outer support to form a double support structure. The elastic outer support and the elastic inner support have different elastic moduli or elastic characteristics, which can elastically buffer and dissipate energy for vertical live loads and vertical vibrations. The elastic outer support has a lower elastic modulus. The amount of elasticity can absorb more energy, thereby reducing the impact transmitted to the elastic inner support and the core structure; different elastic properties can help distribute stress more evenly, avoid stress concentration, and improve the stability and durability of the structure; internal and external supports with different elasticity can better adapt to different load conditions and improve the adaptability and reliability of the structure; by adjusting the elasticity of the internal and external supports, the vibration frequency can be optimized and resonance can be reduced; by designing the elastic difference between the internal and external supports, the deformation of the structure under temperature changes can be controlled; by adjusting the elasticity of the internal and external supports, the sound insulation and heat insulation effects of the structure can be improved; according to specific engineering requirements and environmental conditions, the elastic properties of the internal and external supports are reasonably selected and designed to achieve the best structural performance. Optionally, the two ends of the spring damper 102 are respectively fixed to the first pressure plate 101 and the second pressure plate 104. Optionally, the first seismic isolation pad 103 is detachably connected and arranged between the first pressure plate 101 and the second pressure plate 104. The first seismic isolation pad 103 completely seals the spring damper 102 and other internal structures in the inner cavity, so that the spring damper 102 and other internal structures do not need to withstand the influence and corrosion of the external environment for a long time, thereby improving durability; combined with the detachable arrangement of the first seismic isolation pad 103, the first seismic isolation pad 103 only needs to be regularly maintained or replaced, so that the long-term use of the support can be achieved and the function can be ensured not to decline.
[0028] like Figure 1 and Figure 2As shown, in this embodiment, the second-stage damping assembly 200 includes a second seismic isolation pad 201, a conical coil spring 202, a shaft cylinder 203 and a sleeve 204; the small end of the conical coil spring 202 abuts against the second pressure plate 104, and the large end of the conical coil spring 202 abuts against the base 300. A plurality of sleeves 204 are evenly spaced along the circumferential direction on the base 300, and the shaft cylinder 203 is arranged at the central axis position of the base 300. The sleeve 204 and the shaft cylinder 203 are both fixedly connected to the base 300, and the outer side of the large diameter end of the conical coil spring 202 is limitedly pressed against the sleeve 204, and the inner side of the conical coil spring 202 is limitedly matched with the shaft cylinder 203. In the support portion between the second pressure plate 104 and the base 300, a conical coil spring 202 is used as an internal elastic support. The conical coil spring 202 is conical in shape. The large end of the conical coil spring 202 is fixedly positioned on the base 300, and the small end of the conical coil spring 202 is against the lower surface of the second pressure plate 104. The conical coil spring 202 can withstand vertical loads and provide stable support. Its spiral shape allows the spring to store energy when compressed, so as to release it when needed, helping the support structure to resist vertical forces. When subjected to impact or vibration, the spring can absorb energy through compression and extension, reducing the impact transmitted to the support structure and connecting parts; the conical coil spring 202 is mainly used for vertical support, and can also resist horizontal forces to a certain extent, especially when subjected to composite loads; the conical coil spring 202 can restore its original shape after compression, and this elastic recovery helps to restore the original position of the support structure after the load is removed. Its spiral shape and elastic properties can help to distribute the load more evenly, reduce stress concentration, and improve the durability of the structure. It can also be used Its shape and elastic properties help to distribute the load more evenly in the horizontal direction; the second seismic isolation pad 201 is arranged in a closed loop on the periphery of the conical coil spring 202 as an elastic outer support to form a double support structure, and the elastic outer support and the elastic inner support have different elastic moduli or elastic properties, which can elastically buffer and dissipate energy for vertical live loads and vertical vibrations; the elastic outer support has a lower elastic modulus and can absorb more energy, thereby reducing the impact transmitted to the elastic inner support and the core structure; different elastic properties can help distribute stress more evenly, avoid stress concentration, and improve the stability and durability of the structure; internal and external supports with different elasticities can better adapt to different load conditions and improve the adaptability and reliability of the structure; by adjusting the elasticity of the internal and external supports, the vibration frequency can be optimized and resonance can be reduced; by designing the elastic difference between the internal and external supports, the deformation of the structure under temperature changes can be controlled; by adjusting the elasticity of the internal and external supports, the sound insulation and heat insulation effects of the structure can be improved; according to specific engineering requirements and environmental conditions, the elastic properties of the internal and external supports are reasonably selected and designed to achieve the best structural performance.A plurality of sleeves 204 arranged in a circle are used to limit the outer side of the large end of the conical coil spring 202, and a shaft cylinder 203 is used to limit the inner side of the conical coil spring 202 to limit the elastic deformation range of the conical coil spring 202. Compared with ordinary cylindrical springs, the conical coil spring 202 has stronger horizontal elastic buffering and energy dissipation capabilities. Since the upper and lower ends are only fixed and positioned by limiting, when the horizontal force or horizontal vibration force is too large, it can escape the restriction and avoid the excessive horizontal force or horizontal vibration force, thereby achieving elastic buffering and energy dissipation while ensuring the structural stability of the entire support structure. Optionally, the second seismic isolation pad 201 is detachably connected and arranged between the second pressure plate 104 and the base 300. The second isolation pad 201 seals the conical coil spring 202 and other internal structures in the inner cavity, so that the conical coil spring 202 and other internal structures do not need to withstand the influence and corrosion of the external environment for a long time, thereby improving durability; combined with the detachable arrangement of the second isolation pad 201, the second isolation pad 201 only needs to be regularly maintained or replaced, so that the long-term use of the support can be achieved and the function can be ensured not to decline.
[0029] like Figure 1 and Figure 2 As shown, in this embodiment, a limiting hole 400 is provided in the middle of the first pressure plate 101 and the second pressure plate 104; the shaft cylinder 203 passes through the limiting hole 400 of the second pressure plate 104 and is arranged close to the first pressure plate 101, or the shaft cylinder 203 passes through the limiting hole 400 of the second pressure plate 104 and the limiting hole 400 of the first pressure plate 101 in sequence and leaves a distance from the upper edge of the first pressure plate 101. The shaft cylinder 203 not only limits the inner side of the conical coil spring 202, but also guides and limits the first pressure plate 101 and / or the second pressure plate 104, and also guides and limits the entire first-stage damping assembly 100; guides the second pressure plate 104 to move along the shaft cylinder 203 through the limiting hole 400, and the radial movement range of the second pressure plate 104 is the distance between the limiting hole 400 and the shaft cylinder 203; when the limiting hole 400 of the first pressure plate 101 deviates from the shaft cylinder 203, the axial movement range of the first pressure plate 101 The range is the distance between the first pressure plate 101 and the shaft cylinder 203, and the radial movement of the first pressure plate 101 is elastically limited by the spring damper 102, thereby realizing horizontal buffering and energy dissipation; when the limiting hole 400 of the first pressure plate 101 is facing the shaft cylinder 203, the first pressure plate 101 is guided to move along the shaft cylinder 203 through the limiting hole 400, and the radial movement range of the first pressure plate 101 is the distance between the limiting hole 400 and the shaft cylinder 203, and at the same time, it is elastically limited by the spring damper 102, thereby realizing horizontal buffering and energy dissipation.
[0030] like Figure 1 and Figure 2As shown, in this embodiment, the lower end of the sleeve 204 and / or the lower end of the shaft cylinder 203 are anchored in the base 300. By adopting the anchor connection method, the lower end of the sleeve 204 and / or the lower end of the shaft cylinder 203 can be synchronously connected to the base 300 when the base 300 is cast and manufactured, which can ensure the stability of the connection between them and also partially strengthen the base 300 to a certain extent.
[0031] like Figure 1 and Figure 2 As shown, in this embodiment, lower pier anchor bars 301 are pre-buried in the base 300, and the lower pier anchor bars 301 are arranged one by one with the sleeve 204, and the upper end of the lower pier anchor bars 301 is anchored in the sleeve 204. The corresponding arrangement and anchoring of the lower pier anchor bars 301 and the sleeve 204 can provide structural stability and ensure a firm connection between the base 300 and the upper structure; the lower pier anchor bars 301 can effectively transfer the load of the upper structure to the base 300, and ensure a reasonable distribution of the load through the anchoring effect of the sleeve 204; when natural disasters such as earthquakes occur, this anchoring method can improve the structural seismic performance of the base 300 that supports and bears the force, and reduce structural damage caused by vibration; the coordinated use of the lower pier anchor bars 301 and the sleeve 204, It can adapt to different stress conditions, including vertical load, horizontal load and combined stress conditions; the sleeve 204 can provide a certain degree of protection for the lower pier anchor bar 301, prevent the lower pier anchor bar 301 from being directly exposed to the environment, and reduce the risk of corrosion; by anchoring the lower pier anchor bar 301 in the sleeve 204, the damage to the lower pier anchor bar 301 caused by uneven stress or fatigue can be reduced, thereby improving the durability of the entire structure; the lower pier anchor bar 301 anchored in the sleeve 204 is not easy to loosen, which helps to maintain the long-term stability of the structure.
[0032] like Figure 1 and Figure 2 As shown, in this embodiment, the cross-sectional shape of at least one of the first pressure-bearing plate 101, the second pressure-bearing plate 104 and the base 300 is a regular polygon, a circle or an ellipse. The structural shape can be selected according to design requirements and environmental requirements, thereby maximizing the support, shock absorption, buffering, energy consumption and other functions, while ensuring stability and durability.
[0033] like Figure 1 and Figure 2As shown, in this embodiment, the shaft cylinder 203, the first seismic isolation pad 103 and the second seismic isolation pad 201 are all elastic parts. The entire support can be formed into a structure with a variety of different elastic moduli or elastic properties to achieve each other's functions, such as the positioning and limiting function of the shaft cylinder 203, the supporting function and protection function of the first seismic isolation pad 103 and the second seismic isolation pad 201, and at the same time, it can also use its own elasticity to achieve auxiliary buffering and energy consumption of the acting force, avoid stress concentration, rigid collision, etc., and thus improve the supporting performance, stability and durability of the entire support.
[0034] like Figure 1 and Figure 2 As shown, in this embodiment, the first seismic isolation pad 103 and / or the second seismic isolation pad 201 are detachably connected and arranged, and a sensor for detecting damage is provided in the first seismic isolation pad 103 and / or the second seismic isolation pad 201. As a seismic isolation support, the first seismic isolation pad 103 and / or the second seismic isolation pad 201 not only play a supporting role, but also have the function of protecting and protecting the internal structure, effectively preventing the internal structure from being affected by the external environment and causing corrosion, aging, attenuation and other problems; the first seismic isolation pad 103 and / or the second seismic isolation pad 201 are detachably connected and arranged, and are directly exposed on the outermost side, so that it is easy to obtain its structural condition, and it is also easy to maintain and replace, thereby avoiding the maintenance and replacement of the entire support, which can improve the durability of the support and reduce the cost of use. Damage detection is realized in the first seismic isolation pad 103 and / or the second seismic isolation pad 201, and a built-in sensor is used to monitor its performance and status. The sensor can be a mechanical sensor, a photoelectric sensor or other types, which can monitor the displacement, deformation, stress, temperature and other parameters of the seismic isolation pad. Specifically, the mechanical sensor can detect the displacement and deformation of the first isolation pad 103 and / or the second isolation pad 201. When the displacement or deformation exceeds the normal threshold, it may be a sign of damage or failure. The photoelectric sensor evaluates the damage by measuring the reflection or transmission of the light beam on the isolation pad. If the light beam is blocked or significantly offset, it may indicate material damage. In addition, the temperature sensor can be used to monitor the temperature changes of the first isolation pad 103 and / or the second isolation pad 201. For example, the rubber isolation pad may produce abnormal temperature changes when it is aged or damaged. The stress sensor can detect the stress distribution inside the first isolation pad 103 and / or the second isolation pad 201. If the stress exceeds the design threshold, it may indicate that the performance of the isolation pad has deteriorated.
[0035] The bridge-tunnel system of this embodiment includes the above-mentioned bridge-tunnel connecting section shock-absorbing bearing.
[0036] During implementation, a bridge-tunnel connected section shock-absorbing bearing is provided, including a lower pier anchor bar 301, a shaft cylinder 203, a conical coil spring 202, a spring damper 102, a pressure plate (a first pressure plate 101 and a second pressure plate 104) and a rubber vibration isolation pad (a first isolation pad 103 and a second isolation pad 201). The upper part of the lower pier anchor bar 301 is connected with a sleeve 204, the lower part of the sleeve 204 and the lower pier anchor bar 301 are cast into a base 300 by concrete, the upper part of the sleeve 204 is exposed from the base 300, and is arranged in a circular shape, so that the conical coil spring 202 can be fixed in a horizontal position, and a shaft cylinder 203 is sleeved inside, and the lower part of the shaft cylinder 203 is fixed to the base 300. The upper part passes through the middle position of the first pressure plate 101 and the second pressure plate 104. The highest surface of the shaft cylinder 203 is slightly lower than the upper edge of the first pressure plate 101. The two pressure plates are connected by 10 spring dampers 102. The rubber vibration isolation pad (the first isolation pad 103 and the second isolation pad 201) can wrap the conical coil spring 202 and the spring damper 102, and can isolate the air while isolating the vibration, and slow down the aging and rust of the conical coil spring 202 and the spring damper 102. The elastic characteristics of the conical coil spring 202 are nonlinear. As the compression amount increases, the stiffness gradually increases, which is conducive to eliminating and alleviating resonance. It has strong anti-resonance ability and good lateral stability. The problems of the metal structure inside the support being prone to rust and aging and having a short service life are solved. At the same time, the detachable vibration isolation rubber pad can be replaced in time according to the degree of damage, which is helpful for resisting severe cold and hot climate conditions. The setting of the conical coil spring 202 can reduce the vertical and lateral impact and vibration forces. The three buffer structures of the rubber vibration isolation pad (the first isolation pad 103 and the second isolation pad 201), the conical coil spring 202 and the spring damper 102 can make the amplitude change of the bridge-tunnel section more stable, greatly reducing the harm of the imbalance of the bridge-tunnel connection section structure to the bridge and tunnel, and improving the comfort and safety of driving in the bridge-tunnel connection section.
[0037] The bridge-tunnel connection section shock-absorbing support structure includes a concrete-cast base 300, the upper part of the base 300 is fixedly connected with a sleeve 204 and a shaft cylinder 203, the upper part of the conical coil spring 202 is in contact with the second pressure-bearing plate 104, the upper part of the second pressure-bearing plate 104 is fixedly connected with the spring damper 102, the upper part of the spring damper 102 is fixedly connected with the first pressure-bearing plate 101, the concrete-cast base 300 includes a lower pier anchor bar 301, the upper part of the lower pier anchor bar 301 is sleeved with a sleeve 204, the upper part of the sleeve 204 is exposed to the concrete-cast base 300, and the lower pier anchor bar 301 is sleeved with a sleeve 204. A base 300 is built, the conical coil spring 202 is constrained by the sleeve 204 on the outside and the shaft cylinder 203 on the outside, and the lower part is in contact with the concrete cast base 300. The shaft cylinder 203 passes through the second pressure plate 104 and the first pressure plate 101 from bottom to top, and the top surface of the shaft cylinder 203 is slightly lower than the upper edge of the first pressure plate 101. The sleeves 204 are evenly arranged in a circle on the base 300, and the spring dampers 102 are evenly arranged in a circle and fixedly connected to the upper surface of the second pressure plate 104 and the lower surface of the first pressure plate 101.First, the staff installs the device to the predetermined position. When the live load on the road surface suddenly increases or adverse geological conditions such as earthquakes occur, the vertical vibration generated will first be transmitted from the first pressure plate 101 to the spring damper 102 and the first rubber isolation pad (first isolation pad 103) for the first vibration buffering, and then will be transmitted to the conical coil spring 202 and the second rubber isolation pad (second isolation pad 201) through the second pressure plate 104 for the second vibration buffering, thereby converting the deformation of the first pressure plate 101 into the deformation of the spring damper 102, the rubber isolation pad (first isolation pad 103, second isolation pad 201) and the conical coil spring 202, thereby reducing the impact stress and vertical displacement of the first pressure plate 101, and the lateral vibration generated will be transmitted to the conical coil spring 202 along with the first pressure plate 101, the spring damper 102 and the second pressure plate 104. Since the conical coil spring 202 is horizontally supported by the shaft cylinder 203 The top of the shock-absorbing support has a certain elastic deformation range, and the bottom is constrained by the sleeve 204, so the position is relatively fixed, and the conical coil spring 202 itself has good horizontal stability. Therefore, when the shock-absorbing support is subjected to horizontal loads, the relative lateral displacement of the upper part will be controlled by the conical coil spring 202 and greatly reduced, so that the shock-absorbing support can achieve a large overall lateral displacement without losing stability, and maintain a small horizontal stiffness, thereby increasing the practicality of the device. The internal core components of the shock-absorbing support are all protected by rubber isolation pads (the first isolation pad 103, the second isolation pad 201), so that the internal core components are less affected by the external environment, thereby slowing down the speed of rust and aging, and increasing the service life of the device. In addition, the external rubber isolation pads (the first isolation pad 103, the second isolation pad 201) are easy to replace, and sensors can be added to them to detect damage, and they can be replaced irregularly according to the detection indicators, so as to achieve good endurance function and practicality of the device.
[0038] The following beneficial effects are achieved: The shock-absorbing bearing of the bridge-tunnel connection section is sealed inside the bearing by setting a rubber vibration isolation pad, which greatly reduces the contact between the internal metal components and the air. At the same time, the vibration isolation rubber pad can alleviate the vertical impact force and resonance force transmitted from the bridge-tunnel road surface, and the vibration isolation rubber pad is detachable. Engineers can replace it irregularly through regular inspections, which is easy to operate and has low cost. A conical helical spring 202 is set at the center of the bearing. Its large bottom surface and small top surface can alleviate the lateral impact force and shear force on the bridge-tunnel connection section, greatly reducing the lateral relative displacement of the upper structure. In addition, the spring damper 102 arranged on the upper part of the conical helical spring 202 can achieve a triple shock absorption effect, which will better protect the safety of the bridge-tunnel connection section structure and the stability of driving.
[0039] Matters not covered in this utility model are known technologies.
[0040] 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.
[0041] 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.
[0042] 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 bridge-tunnel connection section shock-absorbing bearing, characterized in that: It comprises a first-stage damping component (100), a second-stage damping component (200) and a base (300) which are arranged in sequence from top to bottom; The first-stage damping assembly (100) and the second-stage damping assembly (200) are combined to form a two-stage vertical vibration buffering and damping mechanism; The second-stage damping assembly (200) constitutes a main lateral vibration buffering and damping mechanism, and the first-stage damping assembly (100) constitutes an auxiliary lateral vibration buffering and damping mechanism; The first-stage damping assembly (100) comprises a first pressure-bearing plate (101), a spring damper (102), a first seismic isolation pad (103) and a second pressure-bearing plate (104); the first pressure-bearing plate (101) and the second pressure-bearing plate (104) are arranged at intervals, the spring damper (102) and the first seismic isolation pad (103) are arranged between the first pressure-bearing plate (101) and the second pressure-bearing plate (104), a plurality of spring dampers (102) are arranged at even intervals along the circumferential direction, and the first seismic isolation pad (103) is arranged in a closed ring shape on the outer periphery of the spring damper (102) and is arranged at intervals from the spring damper (102); The second-stage damping assembly (200) comprises a second seismic isolation pad (201), a conical coil spring (202), a shaft cylinder (203) and a sleeve (204); the small end of the conical coil spring (202) abuts against the second pressure-bearing plate (104), the large end of the conical coil spring (202) abuts against the base (300), a plurality of sleeves (204) are evenly spaced and arranged on the base (300) along the circumferential direction, the shaft cylinder (203) is arranged at the central axis position of the base (300), the sleeve (204) and the shaft cylinder (203) are both fixedly connected to the base (300), the outer side of the large diameter end of the conical coil spring (202) abuts against the sleeve (204), and the inner side of the conical coil spring (202) is limitedly matched with the shaft cylinder (203).
2. The bridge-tunnel connection section shock-absorbing bearing according to claim 1, characterized in that: Limiting holes (400) are provided in the middle of the first pressure-bearing plate (101) and the second pressure-bearing plate (104); The shaft cylinder (203) passes through the limiting hole (400) of the second pressure-bearing plate (104) and is arranged close to the first pressure-bearing plate (101), or The shaft cylinder (203) passes through the limiting hole (400) of the second pressure-bearing plate (104) and the limiting hole (400) of the first pressure-bearing plate (101) in sequence and leaves a distance with the upper edge of the first pressure-bearing plate (101).
3. The bridge-tunnel connection section shock-absorbing bearing according to claim 1 or 2, characterized in that: The lower end of the sleeve (204) and / or the lower end of the shaft cylinder (203) are anchored in the base (300).
4. The bridge-tunnel connection section shock-absorbing bearing according to claim 3 is characterized in that: The base (300) is pre-buried with lower pier anchor bars (301). The lower pier anchor bars (301) and sleeves (204) are arranged one by one. The upper end of the lower pier anchor bar (301) is anchored in the sleeve (204).
5. The bridge-tunnel connection section shock-absorbing bearing according to claim 1 or 2, characterized in that: The cross-sectional shape of at least one of the first pressure-bearing plate (101), the second pressure-bearing plate (104) and the base (300) is a regular polygon, a circle or an ellipse.
6. The bridge-tunnel connection section shock-absorbing bearing according to claim 1 or 2, characterized in that: The shaft cylinder (203), the first seismic isolation pad (103) and the second seismic isolation pad (201) are all elastic parts.
7. The bridge-tunnel connection section shock-absorbing bearing according to claim 1 or 2, characterized in that: The first seismic isolation pad (103) and / or the second seismic isolation pad (201) are arranged in a detachable manner. A sensor for detecting damage is provided inside the first seismic isolation pad (103) and / or the second seismic isolation pad (201).
8. A bridge-tunnel system, characterized in that: It comprises the bridge-tunnel connecting section shock absorbing bearing according to any one of claims 1 to 7.