Expressway bridge supporting structure

Abstract

The utility model discloses an expressway bridge supporting structure, which relates to the technical field of bridges, and comprises a pier and a bridge tower, the pier comprises a pier main body, a pier foundation and an annular energy consumption damper, the pier main body is used for supporting the bottom of a bridge girder, and the pier main body is a structure formed by pouring concrete into a hollow steel pipe; the bridge pier foundation is of a concrete structure where anchoring steel bars are embedded, and the bridge pier body is fixed to the bridge pier foundation through connecting pieces. The annular energy consumption damper comprises an inner metal ring, an outer metal ring and a viscoelastic damping material layer, the inner metal ring and the outer metal ring are sequentially arranged on the bridge pier body in a sleeving mode from inside to outside, and the viscoelastic damping material layer is arranged between the inner metal ring and the outer metal ring so that the annular energy consumption damper can consume earthquake energy; the bridge tower comprises a bridge tower body and prestressed steel cables, the bridge tower body is used for being fixed to a bridge girder, and the two sides of the bridge tower body are connected with the bridge girder through the multiple sets of prestressed steel cables so as to apply upward pulling force to the bridge girder.

Description

TECHNICAL FIELD

[0001] The utility model relates to bridge technical field, in particular to a highway bridge support structure. BACKGROUND

[0002] The column pier is a support component commonly used in the highway bridge, and the main body of the column pier is a reinforced concrete structure column or square column, the bottom of which is connected with the foundation through steel reinforcement anchoring, and can transmit the load of the upper structure of the bridge (including the beam body dead weight, vehicle live load, wind load, etc.) to the foundation, and then to the ground.

[0003] However, since the column pier mainly adopts reinforced concrete material, the concrete is relatively weak in bearing tension during the earthquake, although the steel reinforcement is configured to enhance the tensile capacity of the column pier, under the action of strong earthquake, one side of the column pier may be subjected to a large tension, which will cause the concrete on the side to crack, reduce the cross-sectional stiffness of the column pier, and affect the seismic performance thereof. Moreover, under the repeated action of the earthquake, the steel reinforcement in the reinforced concrete structure may yield, which will cause the load bearing capacity of the column pier to decrease, further reducing the seismic performance thereof.

[0004] It can be seen that the column pier is difficult to dissipate the seismic energy by relying on the deformation of the material itself, and has the problem of poor seismic performance. UTILITY MODEL CONTENT

[0005] The utility model aims to provide a highway bridge support structure to solve the problems in the above related technologies, and improve the seismic performance of the bridge and prolong the service life of the bridge.

[0006] To achieve the above object, the utility model provides the following scheme.

[0007] The utility model provides a highway bridge support structure, including pier and bridge tower, the pier includes pier main body, pier foundation and annular energy dissipation damper, the pier main body is used for supporting at the bottom of bridge girder, the pier main body is the structure formed by the hollow steel pipe pouring concrete, the pier foundation is the concrete structure that has embedded anchoring steel bar, and the pier main body is fixed on the pier foundation through the connecting piece, the annular energy dissipation damper includes inner metal ring, outer metal ring and viscoelastic damping material layer, the inner metal ring and the outer metal ring are successively set on the pier main body from inside to outside, and the elastic damping material layer is arranged between the inner metal ring and the outer metal ring, so that the annular energy dissipation damper can dissipate seismic energy, the bridge tower includes bridge tower main body and prestressed steel cable, the bridge tower main body is used for fixing on the bridge girder, and the two sides of the bridge tower main body are connected with the bridge girder through multiple groups of prestressed steel cable to exert the upward tension on it.

[0008] Preferably, a plurality of the ring-shaped energy dissipation dampers are arranged along the axial direction of the pier body.

[0009] Preferably, the connecting member is a connecting sleeve, which is vertically arranged, the lower end of the connecting sleeve is anchored in the pier foundation by grouting material, and is connected with the anchoring steel bars in the pier foundation; the lower end of the pier body is anchored in the connecting sleeve by grouting material.

[0010] Preferably, the connecting sleeve is a structure formed by four quarter-circular tubes.

[0011] Preferably, the upper part of the bridge tower body is a cable anchoring area, a plurality of groups of prestressed cable anchoring devices are arranged in the cable anchoring area, and the prestressed cable anchoring devices are arranged one by one corresponding to the prestressed cables.

[0012] Preferably, the prestressed cable anchoring device is a clamping piece type anchoring device, a upsetting head type anchoring device, a nut type anchoring device or an extrusion type anchoring device.

[0013] Preferably, the bridge tower body is a space lattice structure formed by a plurality of steel rod members.

[0014] Preferably, the lower part of the bridge tower body is a support structure area, the cross section of the steel rod member located below in the support structure area is greater than the cross section of the steel rod member located above.

[0015] Preferably, the adjacent steel rod members in the bridge tower body are connected by bolts.

[0016] Preferably, the pier body is further wrapped with an FRP outer cladding layer.

[0017] The utility model discloses relative to relevant technologies has obtained following technical effect:

[0018] The highway bridge supporting structure provided by the utility model, when in normal use state, the pier main body supports the bottom of the bridge girder, and the tower main body exerts upward tension on the bridge girder through a plurality of groups of prestressed cables, wherein the pier main body formed by pouring concrete into a hollow steel pipe can effectively bear the vertical load transmitted from the bridge superstructure, and the hollow steel pipe bears axial pressure and part of the bending moment, and the compressive capacity of the structure is improved by filling concrete inside the hollow steel pipe, the two are mutually constrained and bear force together, meanwhile, the upward tension exerted by the tower on the bridge girder is balanced with the downward force generated by the dead load and live load of the bridge girder, the bending moment of the bridge girder in the span is reduced, and thus the vertical pressure borne by the pier is reduced.

[0019] When in earthquake state, the horizontal and vertical load generated by the earthquake acts on the pier, the annular energy dissipation damper deforms first, the inner metal ring and the outer metal ring move relatively, energy is dissipated through the viscoelastic damping material between the inner metal ring and the outer metal ring, and the seismic energy is absorbed, so that the vibration amplitude of the pier is reduced, and the hollow steel pipe concrete structure of the pier main body has good mechanical properties, can deform plastically to a certain extent under the action of the earthquake, consume energy, avoid brittle failure, delay or avoid the failure modes such as buckling of the steel pipe and cracking of the concrete, protect the overall structural integrity of the pier, and ensure that the pier can still provide vertical support for the bridge girder, meanwhile, the prestressed cable can also play a certain restraining role in the earthquake, adjust the stress state of the bridge girder and the tower, reduce the overall response of the structure, make the tower transmit the horizontal load to the foundation and resist the earthquake action together with the pier, and maintain the stability of the bridge. For the overall structure of the bridge, the pier, the tower and the bridge girder can form a cooperative system under the action of the earthquake, the pier and the tower provide sufficient rigidity and stability for the bridge through the seismic design of the pier and the tower and the cooperation between the components, prevent the bridge from collapsing, meanwhile, the prestressed cable plays an important role in adjusting the stress of the structure, makes the whole bridge structure better adapt to the earthquake action, reduces the possibility of structural damage, and prolongs the service life of the bridge. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the related art, the drawings needed in the embodiments will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained based on these drawings without creative labor.

[0021] Fig. 1 The use state diagram of the highway bridge support structure provided by the embodiment of the present application is shown in the figure.

[0022] Fig. 2 The top view of the pier provided by the embodiment of the present application is shown in the figure.

[0023] Fig. 3 The perspective view of the pier provided by the embodiment of the present application is shown in the figure.

[0024] In the figure: 01-bridge girder, 1-pier main body, 2-pier foundation, 3-ring energy dissipation damper, 4-bridge tower main body, 5-prestressed steel cable, 6-connection sleeve. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0026] The purpose of the present application is to provide a highway bridge support structure to solve the problems in the related art, improve the seismic performance of the bridge, and prolong the service life of the bridge.

[0027] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the present application will be described in further detail below with reference to the drawings and specific embodiments.

[0028] As Figs. 1-3As shown, the embodiment provides a highway bridge support structure, comprising a pier and a tower, the pier comprising a pier body 1, a pier foundation 2 and a ring-shaped energy dissipation damper 3, the pier body 1 being used for supporting the bottom of a bridge girder 01, the pier body 1 being a structure formed by pouring concrete into a hollow steel pipe; the pier foundation 2 is a concrete structure with embedded anchoring steel bars, and the pier body 1 is fixed on the pier foundation 2 through a connecting piece; the ring-shaped energy dissipation damper 3 comprises an inner metal ring, an outer metal ring and an elastomeric damping material layer, the inner metal ring and the outer metal ring are sequentially sleeved on the pier body 1 from inside to outside, and the elastomeric damping material layer is arranged between the inner metal ring and the outer metal ring, so that the ring-shaped energy dissipation damper 3 can dissipate seismic energy; the tower comprises a tower body 4 and a prestressed cable 5, the tower body 4 is used for being fixed on the bridge girder 01, and the two sides of the tower body 4 are connected with the bridge girder 01 through multiple groups of prestressed cables 5 to exert upward tension on the tower body 4.

[0029] It should be noted that the pier body 1 in the embodiment is composed of a hollow steel pipe, and high-performance self-compacting concrete is poured into the inside; the hollow steel pipe is the main force member, which bears most of the vertical and horizontal loads, and the hollow design effectively reduces the material usage while ensuring the structural strength.

[0030] It should be noted that the pier foundation 2 in the embodiment is located at the bottom of the pier, and the pier foundation 2 with an enlarged design increases the contact area with the foundation, which can better transmit the load borne by the pier to the foundation and improve the stability of the pier, and the size and shape thereof can be designed and adjusted according to the geological conditions.

[0031] In the embodiment, multiple ring-shaped energy dissipation dampers 3 are arranged, and all the ring-shaped energy dissipation dampers 3 are arranged along the axial direction of the pier body 1.

[0032] It should be noted that the ring-shaped energy dissipation dampers 3 in the embodiment are arranged at intervals of 10m along the height direction of the pier; in the normal use state, the ring-shaped energy dissipation dampers 3 have little effect on the structure stress; when an earthquake occurs, the inner metal ring and the outer metal ring deform relatively, and the shear deformation of the elastomeric damping material layer between the two generates shear deformation, thereby dissipating seismic energy and reducing the vibration amplitude of the pier, and protecting the structure of the pier body 1.

[0033] In the embodiment, the connecting piece is a connecting sleeve 6, the connecting sleeve 6 is vertically arranged, the lower end of the connecting sleeve 6 is anchored in the pier foundation 2 by grouting material and is connected with the anchoring steel bars in the pier foundation 2, and the lower end of the pier body 1 is anchored in the connecting sleeve 6 by grouting material.

[0034] It should be noted that the anchoring steel bars embedded in the pier foundation 2 cooperate with the connecting sleeve 6 arranged at the bottom of the pier, are anchored by high-strength grouting material, form reliable connection, and the anchoring steel bars penetrate into the connecting sleeve 6, the gap between them is filled with high-strength grouting material, ensuring firm connection, so that the pier body 1 and the pier foundation 2 work together.

[0035] In the present embodiment, the connecting sleeve 6 is a structure composed of four quarter-circular tubes.

[0036] It should be noted that the connecting sleeve 6 in the present embodiment adopts a split design, i.e., the connecting sleeve 6 is composed of four parts, each part has the same shape and size, and those skilled in the art can also make specific designs according to needs to adapt to different geological conditions and load requirements. The split design allows each part to be prefabricated in the factory and then transported to the construction site for assembly; the internal space of the connecting sleeve 6 is designed to accommodate the anchoring steel bars, ensuring that the anchoring steel bars can penetrate into the connecting sleeve 6 and form a firm mechanical connection with the connecting sleeve 6; the design of the connecting sleeve 6 includes a grouting material channel so that the high-strength grouting material can uniformly fill the gap between the connecting sleeve 6 and the anchoring steel bars, forming a reliable anchoring connection; the split structure of the connecting sleeve 6 needs to have good sealing performance to prevent grouting material from leaking during the curing process, ensuring that the grouting material can fully fill all gaps.

[0037] The split structure of the connecting sleeve 6 has the following advantages:

[0038] First, construction convenience: the split structure makes the transportation and installation of the connecting sleeve 6 more convenient, especially in construction sites with limited space or large pier volume.

[0039] Second, improve connection strength: although the connecting sleeve 6 is a split structure, through reasonable splicing and connecting methods, its overall strength can be ensured not to be lower than or even exceed that of the traditional integral structure; the split structure can also disperse stress to some extent, reducing the risk of damage caused by stress concentration.

[0040] Third, adaptability: the split structure can be adjusted according to specific geological conditions and design requirements, providing greater flexibility and adaptability.

[0041] Fourth, economy: the split structure can reduce the amount of material used, reduce waste, and reduce overall costs due to improved construction efficiency.

[0042] In the present embodiment, the upper part of the bridge tower body 4 is a cable anchoring area, and a plurality of groups of prestressed cable anchoring devices are arranged in the cable anchoring area, with one-to-one correspondence with the prestressed cables 5.

[0043] It should be noted that for a single prestressed cable 5, one end is anchored to the cable anchorage area of the tower body 4 through the corresponding prestressed cable anchoring device, and the other end is fixed to the bridge girder 01. By applying prestress to the prestressed cable 5, an upward tension is applied to the bridge girder 01, thereby improving the stress state of the bridge girder 01 under vertical load, reducing the bending moment of the bridge girder 01, and reducing the vertical pressure borne by the pier.

[0044] In the present embodiment, the prestressed cable anchoring device is a clamping piece type anchoring device, a upsetting anchoring device, a nut anchoring device or an extrusion anchoring device.

[0045] It should be noted that for the clamping piece type anchoring device, it is composed of an anchor ring and a set of adjustable clamping pieces. The clamping pieces can clamp the cable to transmit prestress. The advantages are that the installation is simple, the tensioning and relaxing of prestress is convenient, and it is suitable for various types of prestressed cables 5. For the upsetting anchoring device, one end of the prestressed cable 5 is fixed in a metal sleeve and anchored by upsetting (flattening). The advantages are that the structure is simple and the carrying capacity is strong, and it is suitable for high prestress occasions. For the nut anchoring device, the tension of the prestressed cable 5 is transmitted to the anchorage area by using nuts and washers. The advantages are that the installation and tensioning are convenient, and it can be reused, and it is suitable for situations that require multiple tensioning or relaxation of prestress. For the extrusion anchoring device, the prestressed cable 5 is fixed in the anchor by extrusion, which can be one-way or multi-way. The advantages are that the gripping force on the prestressed cable 5 is strong, and it is suitable for high stress and complex stress conditions. In addition, the skilled person in the art can also select a self-anchoring system according to the needs, i.e. using the bridge structure itself as the anchoring point, and the prestressed cable 5 is directly anchored on the bridge structure. The advantages are that it is suitable for specific types of bridges, such as suspension bridges, and can reduce the additional anchoring structure.

[0046] In the present embodiment, the tower body 4 is a spatial lattice structure formed by connecting a plurality of steel bar members.

[0047] It should be noted that the tower body 4 in the present embodiment is composed of high-strength steel bar members, forming a unique spatial lattice structure. This structure form has high structural efficiency, which can maximize the reduction of material usage while ensuring structural strength and rigidity.

[0048] In the present embodiment, the lower part of the tower body 4 is a support structure area, and the cross section of the steel bar member located below in the support structure area is larger than that of the steel bar member located above.

[0049] It should be noted that the bottom steel bar member of the support structure area of the tower body 4 in the present embodiment bears a large load, so a larger cross section is used. The top steel bar member of the support structure area bears a smaller load, and the cross section is correspondingly reduced.

[0050] In the embodiment, the steel bars inside the tower body 4 are connected by bolts.

[0051] It should be noted that the steel bars in the embodiment are connected by high-strength bolts to form a stable space structure, which can effectively transmit the load from the upper part to the foundation.

[0052] In the embodiment, the pier body 1 is also wrapped with an FRP outer layer.

[0053] It should be noted that the FRP outer layer in the embodiment is wrapped outside the pier body 1, which has the characteristics of high strength, corrosion resistance, light weight, etc.; it not only protects the hollow steel pipe from external environmental erosion and improves the durability of the pier, but also enhances the overall performance of the structure to some extent, such as restraining the deformation of the hollow steel pipe and improving its stability.

[0054] The cooperation relationship of each component of the highway bridge support structure provided in the embodiment and the cooperation relationship of each component with the bridge girder 01 are as follows:

[0055] First, the pier and the tower: the pier provides vertical support for the tower to ensure the stability of the tower. The tower exerts tension on the bridge girder 01 through the prestressed cable 5 to reduce the pressure of the bridge girder 01 on the pier, and the spatial lattice structure of the tower itself can cooperate with the pier to resist horizontal load and improve the lateral stiffness and stability of the bridge as a whole.

[0056] Second, the pier and the bridge girder 01: the pier bears the vertical load and part of the horizontal load from the bridge girder 01 and provides a stable support point for the bridge girder 01. In special cases such as earthquakes, the pier and the bridge girder 01 work together to protect the overall structure of the bridge through their structural characteristics and energy dissipation devices.

[0057] Third, the tower and the bridge girder 01: the tower is connected to the bridge girder 01 through the prestressed cable 5, and the tension of the prestressed cable 5 adjusts the stress state of the bridge girder 01, making the internal force distribution of the bridge girder 01 under the action of dead load and live load more reasonable. At the same time, under the action of horizontal load, the tower can transmit the horizontal force to the foundation through its own structure, indirectly affecting the stress of the bridge girder 01.

[0058] Fourth, the ring-shaped energy dissipation damper 3 and the pier body 1: under the action of earthquake, the ring-shaped energy dissipation damper 3 works together with the pier body 1. The ring-shaped energy dissipation damper 3 deforms first to dissipate energy and reduce the vibration of the pier, while the hollow steel pipe concrete structure of the pier body 1 remains stable under the protection of the ring-shaped energy dissipation damper 3 to prevent brittle failure.

[0059] The working principle of the highway bridge support structure provided in the embodiment is as follows:

[0060] First, normal use state:

[0061] Pier: Hollow steel pipe concrete structure effectively bears the vertical load from the superstructure of the bridge by the synergy of steel pipe and concrete. Steel pipe bears axial compression and part of the bending moment, and the internal concrete fills the steel pipe, improving the compression resistance of the structure. The two are mutually constrained and jointly stressed. The FRP outer layer prevents the erosion of the external environment to the steel pipe, ensuring the durability of the structure.

[0062] Tower: The spatial lattice structure uniformly transmits its own weight and the load from the superstructure to the foundation. The prestressed cable 5 in the cable anchorage zone exerts an upward tension on the bridge girder 01 through the anchoring device, which balances the downward force generated by the self-weight and live load of the bridge girder 01, thereby reducing the bending moment of the bridge girder 01 in the span and the vertical pressure on the pier. The members in the support structure zone reasonably distribute the load according to the stress condition, ensuring the overall stability of the tower.

[0063] Overall structure: Under the action of vertical load, the pier, tower, and bridge girder 01 maintain the balance and stability of the bridge structure through reasonable connection and synergy. Each component transmits the load according to the designed stress path, ensuring the normal passage of the bridge.

[0064] Second, earthquake state:

[0065] Pier: The horizontal and vertical loads generated by the earthquake act on the pier. The ring-shaped energy dissipation damper 3 deforms first, causing the relative movement between the inner and outer metal rings to make the layer of viscoelastic damping material dissipate energy, absorb seismic energy, and reduce the vibration amplitude of the pier. At the same time, the good mechanical properties of the hollow steel pipe concrete structure enable it to undergo a certain degree of plastic deformation under the action of the earthquake, dissipate energy, and avoid brittle failure. The failure modes such as buckling of the steel pipe and cracking of the concrete are delayed or avoided, protecting the overall structural integrity of the pier and ensuring that it can still provide vertical support for the bridge.

[0066] Tower: The tower of the spatial lattice structure resists the horizontal load generated by the earthquake through the deformation and stress distribution of its members. The connection nodes between the members can effectively transmit internal forces, allowing the horizontal load to be uniformly distributed to the entire tower structure. The prestressed cable 5 can also play a certain restraining role during the earthquake, adjusting the stress state of the bridge girder 01 and the tower, and reducing the overall response of the structure. The tower transmits the horizontal load to the foundation and resists the earthquake action together with the pier, maintaining the stability of the bridge.

[0067] Overall structure: The piers, towers, and main girder 01 form a coordinated system under seismic action. The piers and towers provide sufficient stiffness and stability to the bridge through their seismic design and the coordination between components, preventing the bridge from collapsing. The prestressed cables 5 play an important role in adjusting the structural stress, enabling the entire bridge structure to better adapt to seismic action and reducing the likelihood of structural damage.

[0068] The highway bridge support structure provided by the embodiment has the following advantages:

[0069] First, enhanced seismic performance:

[0070] Pier energy dissipation: The installation of the ring-shaped energy dissipation damper 3 is crucial for improving the seismic performance of the pier. Under seismic action, it can effectively absorb and dissipate seismic energy through its deformation and the energy dissipation characteristics of the damping material, reducing the vibration response of the pier. This not only reduces the stress on the pier during an earthquake, but also protects the main body 1 of the pier structure from severe damage, ensuring the repairability of the bridge after an earthquake.

[0071] The good ductility of the hollow steel pipe concrete structure allows it to undergo plastic deformation during an earthquake, further dissipating energy and avoiding sudden brittle failure. The interaction between the steel pipe and the concrete can constrain deformation to some extent, improving the overall stability of the structure and enhancing the survival ability of the pier during an earthquake.

[0072] Tower collaborative seismic resistance: The spatial lattice structure of the tower has high lateral stiffness, effectively resisting horizontal seismic forces. The reasonable arrangement and connection of the tower's members allow horizontal loads to be evenly distributed throughout the structure, avoiding local stress concentration. The prestressed cables 5 also play a certain restraining role during an earthquake, adjusting the stress state of the tower and the main girder, reducing the overall deformation of the structure, and improving the seismic performance of the bridge.

[0073] Second, reduce material usage:

[0074] Pier optimization design: The use of hollow steel pipe concrete structure significantly reduces the amount of concrete compared to traditional solid piers. The hollow part reduces the self-weight of the structure without affecting its carrying capacity, and also reduces the amount of steel used. The use of FRP outer layer not only improves the durability of the structure, but also helps to reduce the weight of the overall structure due to its lightweight and high-strength characteristics.

[0075] Efficient tower structure: The spatial lattice structure of the tower optimizes the use of materials through reasonable member arrangement and variable cross-section design. By adjusting the cross-section of the members according to the stress size, material waste is avoided, and compared to traditional solid towers, a large amount of steel is saved, reducing the engineering cost while ensuring the strength and stiffness of the structure.

[0076] Third, improve durability:

[0077] Bridge pier corrosion protection: FRP outer cladding provides effective protection for the bridge pier steel pipe, preventing it from being eroded by external environmental factors such as moisture, oxygen, chemicals, etc. This greatly extends the service life of the steel pipe, reduces the decline in structural performance and increases maintenance costs due to corrosion. At the same time, the high-density self-compacting concrete inside can also resist a certain degree of erosion, further improving the durability of the bridge pier.

[0078] Bridge tower anti-corrosion measures: The high-strength steel members used in the bridge tower have undergone special corrosion protection treatment, such as galvanizing, painting, or using corrosion-resistant steel, etc., which can adapt to complex environmental conditions. The spatial lattice structure is conducive to air circulation, reducing the possibility of water accumulation and corrosion medium accumulation, thereby reducing the risk of member corrosion and ensuring the structural performance of the bridge tower during long-term use.

[0079] Fourth, adapt to complex geological conditions:

[0080] Bridge pier foundation 2 adaptability: The enlarged foundation at the bottom of the bridge pier and the special connecting device can be flexibly designed according to different geological conditions. In soft soil foundation, the area of the enlarged foundation can be increased to improve the bearing capacity of the foundation; in rock foundation, the connecting device can be optimized to ensure the firm connection between the bridge pier and the foundation. This adaptive design enables the bridge to be stably constructed and operated under various complex geological conditions.

[0081] Bridge tower structure adaptability: The spatial lattice structure of the bridge tower has good adaptability to uneven foundation settlement, etc. The connection between its members can allow for small deformations and adjustments to a certain extent, allowing the redistribution of internal forces to adapt to changes in the foundation and reduce the adverse effects of uneven foundation settlement on the bridge structure, ensuring the safe operation of the bridge.

[0082] Fifth, facilitate construction and maintenance:

[0083] Construction convenience: Hollow steel pipe concrete bridge piers can prefabricate steel pipes and process related parts in the factory, then transport them to the site for assembly and concrete pouring, improving construction efficiency and reducing on-site construction time and impact on the surrounding environment. The spatial lattice structure members of the bridge tower can be prefabricated in the factory and connected on site through high-strength bolts, making the construction process relatively simple and the quality easy to control.

[0084] Maintenance convenience: the piers and towers of the structural form rule facilitate the inspection and maintenance of key parts. For example, the annular energy dissipation damper 3 can be conveniently inspected and replaced, and the anchoring of the prestressed cable 5 is also easy to inspect and adjust. The inspection and maintenance of the bar connection joint are also convenient, which can timely find and handle potential problems, reduce maintenance cost, and prolong the service life of the bridge.

[0085] The principle and implementation mode of the utility model are described by applying specific examples in the utility model, and the above embodiment is only used for helping to understand the method and core idea of the utility model; meanwhile, for the general technical personnel in the field, according to the idea of the utility model, there will be changes in the specific implementation mode and application range. In conclusion, the content of the specification should not be understood as the limitation of the utility model.

Claims

1. A support structure for a highway bridge, characterized in that: The bridge includes piers and towers. The piers consist of a pier body, a pier foundation, and an annular energy-dissipating damper. The pier body supports the bottom of the main beam of the bridge and is a structure formed by pouring concrete into hollow steel pipes. The pier foundation is a concrete structure with pre-embedded anchoring steel bars, and the pier body is fixed to the pier foundation by connectors. The annular energy-dissipating damper includes an inner metal ring, an outer metal ring, and a viscoelastic damping material layer. The inner and outer metal rings are sequentially fitted onto the pier body from the inside out, and the viscoelastic damping material layer is disposed between the inner and outer metal rings to dissipate seismic energy. The towers consist of a tower body and prestressed steel cables. The tower body is fixed to the main beam of the bridge, and both sides of the tower body are connected to the main beam by multiple sets of prestressed steel cables to apply an upward tensile force.

2. The highway bridge support structure according to claim 1, characterized in that: Multiple annular energy-dissipating dampers are provided, and all of the annular energy-dissipating dampers are arranged along the axial direction of the main body of the bridge pier.

3. The highway bridge support structure according to claim 1, characterized in that: The connector is a connecting sleeve, which is vertically arranged. The lower end of the connecting sleeve is anchored in the pier foundation by grouting material and is inserted into the anchoring steel bar in the pier foundation. The lower end of the pier body is anchored in the connecting sleeve by grouting material.

4. The highway bridge support structure according to claim 3, characterized in that: The connecting sleeve is a structure composed of four quarter-circular cylinders joined together.

5. The highway bridge support structure according to claim 1, characterized in that: The upper part of the bridge tower body is the cable anchorage zone, and multiple sets of prestressed steel cable anchorage devices are installed in the cable anchorage zone. Each prestressed steel cable anchorage device is installed in a one-to-one correspondence with a prestressed steel cable.

6. The highway bridge support structure according to claim 5, characterized in that: The prestressed steel cable anchoring device is a wedge-type anchoring device, an upset head anchoring device, a nut anchoring device, or a compression anchoring device.

7. The highway bridge support structure according to claim 1, characterized in that: The main body of the bridge tower is a spatial lattice structure formed by connecting multiple steel rods.

8. The highway bridge support structure according to claim 7, characterized in that: The lower part of the main body of the bridge tower is a support structure area, and the cross-section of the lower steel member in the support structure area is larger than the cross-section of the upper steel member.

9. The highway bridge support structure according to claim 7, characterized in that: The adjacent steel members within the main body of the bridge tower are connected by bolts.

10. The highway bridge support structure according to any one of claims 1-9, characterized in that: The main body of the bridge pier is also covered with an FRP outer layer.

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