Fabricated tied arch steel structure bridge with interlocking function

Abstract

The invention discloses an assembly type tied arch steel structure bridge with an interlocking function, and belongs to the technical field of steel arch bridge devices, the assembly type tied arch steel structure bridge comprises bridge pile assemblies, a bridge floor assembly and steel frame arch ribs, the steel frame arch ribs are fixed to the top ends of the bridge pile assemblies, the bridge floor assembly is located between the bridge pile assemblies, through holes are formed in the side faces of the steel frame arch ribs, and the through holes are communicated with the bridge pile assemblies. And an anti-roll limiting rod is inserted into the through hole. The stress interlocking dispersion frame and the thrust interlocking rod are arranged in a matched mode, the stress interlocking dispersion frame is matched with the anti-roll limiting rod, thrust applied to the exposed bridge abutment by deformation of the steel frame arch rib can be transferred to the stress interlocking dispersion frame so as to weaken the thrust, except gravity, borne by the exposed bridge abutment, and when the pulling force borne by the two ends of the anti-roll limiting rod is different, the stress interlocking dispersion frame is separated from the thrust interlocking rod. Part of tension can be counteracted by the aid of opposite tension, thrust, except gravity, borne by the exposed bridge abutment is weakened synchronously, and the suspension cable interlocking assemblies on the whole steel frame arch rib can form a complementary effect by the aid of the thrust interlocking rods.

Description

Technical Field

[0001] This invention relates to the field of steel arch bridge construction technology, and more particularly to a prefabricated tied-arch steel structure bridge with interlocking function. Background Technology

[0002] The interlocking principle of a tied arch bridge is the combination of an arch bridge and a beam bridge, which are then locked together by tie rods and hangers. The pressure thrust of the arch ribs and the tension of the tie beams interlock to form a self-balancing system.

[0003] In existing tied arch bridges, the connection points between the arch foot and the bridge piles are mostly welded. These welded points have stress concentrations and must bear not only the weight of the arch ribs but also the thrust transmitted from them. This causes the bridge piles to bear stress in different directions, which negatively impacts their service life and risk resistance. Consequently, the expected service life of the arch bridge deviates significantly from its actual service life. Furthermore, an effective stress interlocking effect cannot be formed between the arch ribs and the tie rods, and the stress at the joints cannot be offset in time, resulting in stress accumulation points. Summary of the Invention

[0004] The purpose of this invention is to solve the problems in the prior art of stress concentration at the welding points of the arch foot and bridge piles in tied arch bridges, which leads to a large deviation between the expected service life and the actual service life of the arch bridge, and the inability to form an effective stress interlocking effect between the arch rib and the tie rod. Therefore, this invention proposes a prefabricated tied arch steel structure bridge with interlocking function.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A prefabricated tied-arch steel structure bridge with interlocking function includes a bridge pile assembly, a bridge deck assembly, and a steel frame arch rib. The steel frame arch rib is fixed to the top of the bridge pile assembly. The bridge deck assembly is located between the bridge pile assemblies. A through hole is opened on the side of the steel frame arch rib. An anti-tilting limiting rod is inserted into the through hole. A stress interlocking distribution frame is sleeved on the outside of the anti-tilting limiting rod. A hollow cavity is opened inside the anti-tilting limiting rod located at an odd number of positions. A hinged shaft is fixed inside the hollow cavity. A lateral tilt limiting rod is hinged to the side of the hinged shaft. Suspension cable interlocking assemblies are provided at both ends of the anti-tilting limiting rod with the hollow cavity. The suspension cable interlocking assemblies are centrally symmetrical about the suspension cable.

[0007] The suspension cable interlocking assembly includes a suspension cable, with suspension booms fixed at both ends. The inclined surfaces at both ends of the suspension booms are attached to the inclined surfaces of the extrusion grooves. The extrusion grooves are located in the middle of the locking arm. A cable clamp is fixed at the bottom end of the locking arm, and the inner wall of the cable clamp is tightly attached to the surface of the suspension cable. A hoisting assembly is provided at one end of the locking arm, and a thrust interlocking rod is connected to the outer side of the locking arm located at the lower symmetrical end of the suspension cable interlocking assembly via a connecting assembly.

[0008] Preferably, the bridge pile assembly includes exposed abutments fixed to both ends of the steel frame arch rib, and foundation piles are fixed to the bottom of the exposed abutments.

[0009] Preferably, the bridge deck assembly includes a cast-in-place bridge deck that fits against the exposed side of the bridge abutment, and a vibration damping component is provided between two adjacent cast-in-place bridge decks.

[0010] Preferably, the vibration damping component includes a connecting groove formed at one end of the cast bridge deck, with buffer springs fixed at the top and bottom of the connecting groove, and mating latches fixed at opposite ends of the upper and lower buffer springs, one end of which is fixed to the surface of the adjacent cast bridge deck.

[0011] Preferably, the side of the cast bridge deck is provided with an insertion hole, and a reinforcing rib is inserted into the insertion hole.

[0012] Preferably, the hoisting assembly includes a hoisting tripod hinged to one end of the locking arm via a shaft, wherein the inner wall of the top hoisting tripod is sleeved on the surface of the anti-tilt limit rod, and the inner wall of the bottom hoisting tripod is sleeved on the surface of the reinforcing rib.

[0013] Preferably, the connecting assembly includes a shaft guide frame fixed to the outside of the locking arm, one end of which is hinged to the inner wall of the thrust interlocking rod via a shaft.

[0014] Preferably, the anti-tilt limiting rod with a hollow cavity is placed alternately with the anti-tilt limiting rod without a hollow cavity.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0016] 1. This invention utilizes a stress-interlocking dispersion frame and a thrust-interlocking rod in combination. The stress-interlocking dispersion frame, in conjunction with the anti-tilt limiting rod, can transfer the thrust exerted on the exposed bridge abutment by the deformation of the steel arch rib caused by the tension transmitted from the suspension cable to the stress-interlocking dispersion frame. This reduces the thrust on the exposed bridge abutment other than gravity, ensuring the actual service life of the exposed bridge abutment. When the tensions at both ends of the anti-tilt limiting rod are different, the side with the heavier load can offset part of the tension through the anti-tilt limiting rod with the help of the opposing tension, ensuring the balance of forces on both sides of the bridge body and simultaneously reducing the thrust on the exposed bridge abutment other than gravity. At the same time, the thrust-interlocking rod can distribute the excessive tension of the suspension cable to other suspension cables, so that the suspension cable interlocking components on the entire steel arch rib form a complementary effect.

[0017] 2. This invention utilizes the coordinated setup of a suspension boom and a locking boom. Because the force changes rapidly during the pouring of the bridge deck, the cable clamps on the suspension boom apply frictional force to the suspension cables to suppress their deformation, thereby reducing the swaying amplitude of the poured bridge deck. Simultaneously, it reduces resonance transmitted to the steel arch ribs through the cable interlocking components. Since there are welded joints between exposed abutments and other structural components connected to the steel arch ribs, significant resonance transmission accelerates damage to these joints, affecting the bridge's actual service life. Because the suspension cables are relatively easy to maintain and replace, and have no welded joints, they are less susceptible to damage from resonance, thus significantly reducing the cost of later bridge maintenance.

[0018] 3. By setting up a tilt limit rod, the present invention allows the tilt limit rod inside the anti-tilt limit rod to further reduce the impact of the resonance on the steel frame arch rib by adjusting the angle after the bridge deck is cast and the resonance is transmitted to the anti-tilt limit rod through the suspension interlock assembly. Attached Figure Description

[0019] Figure 1 This is a structural schematic diagram of a prefabricated tied-arch steel structure bridge with interlocking function proposed in this invention;

[0020] Figure 2 This is an exploded structural diagram of the prefabricated tied-arch steel structure bridge with interlocking function proposed in this invention.

[0021] Figure 3 This is a structural schematic diagram of the stress interlocking and dispersing frame of a prefabricated tie-arch steel structure bridge with interlocking function proposed in this invention.

[0022] Figure 4 This is a schematic cross-sectional view of the cable interlocking assembly of a prefabricated tie-arch steel structure bridge with interlocking function proposed in this invention.

[0023] Figure 5This is an exploded structural diagram of the side tilt limiting rod of a prefabricated tie-arch steel structure bridge with interlocking function proposed in this invention.

[0024] Figure 6 This is an exploded structural diagram of the bridge deck of a prefabricated tied-arch steel structure bridge with interlocking function proposed in this invention.

[0025] In the diagram: 1. Steel frame arch rib; 2. Anti-tilt limiting rod; 3. Stress interlocking distribution frame; 4. Hinged shaft; 5. Tilt limiting rod; 6. Suspension cable; 7. Suspension boom; 8. Extrusion groove; 9. Locking boom; 10. Cable clamp; 11. Thrust interlocking rod; 12. Exposed abutment; 13. Foundation pile; 14. Cast-in-place bridge deck; 15. Connecting groove; 16. Buffer spring; 17. Butt joint tongue; 18. Insertion hole; 19. Reinforcing rib; 20. Lifting tripod; 21. Shaft connecting frame. Detailed Implementation

[0026] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0027] In the description of this invention, it should be noted that the terms "upper," "lower," "inner," "outer," "top / bottom," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0028] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "sleeved / connected," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0029] Example, refer to Figures 1 to 6A prefabricated tied arch steel structure bridge with interlocking function includes a bridge pile assembly. Further, the bridge pile assembly includes exposed abutments 12 fixed to both ends of the steel frame arch rib 1, and foundation piles 13 are fixed to the bottom of the exposed abutments 12.

[0030] The further advantage of adopting the above is that the foundation piles 13 are pre-installed in the ground surface and used as piles to stabilize the exposed bridge abutment 12. This technology is existing technology and will not be described in detail here.

[0031] The bridge deck assembly and steel frame arch rib 1, further, the bridge deck assembly includes a cast bridge deck 14 that fits against the side of the exposed abutment 12;

[0032] The further advantage of the above is that the bridge deck 14 is cast as a carrier for vehicles to pass through by anchoring and casting reinforcement. This technology is existing technology and will not be described in detail here.

[0033] A vibration damping component is provided between two adjacent cast bridge decks 14. Further, the vibration damping component includes a connecting groove 15 opened at one end of the cast bridge deck 14. A buffer spring 16 is fixed at the top and bottom of the connecting groove 15. A mating tongue 17 is fixed at the opposite ends of the upper and lower buffer springs 16. One end of the mating tongue 17 is fixed to the surface of the adjacent cast bridge deck 14. An insertion hole 18 is opened on the side of the cast bridge deck 14. A reinforcing rib 19 is inserted into the insertion hole 18.

[0034] The further advantage of the above is that the buffer spring 16 can form a soft connection at the joint of two adjacent cast bridge decks 14. This avoids resonance transmission between the two adjacent cast bridge decks 14 and creates a shock absorption effect through the buffer spring 16. The elastic deformation of the buffer spring 16 can offset the vibration energy between the adjacent cast bridge decks 14, thereby improving the stability of the vehicle when passing over the cast bridge deck 14.

[0035] The steel arch rib 1 is fixed to the top of the bridge pile assembly. The bridge deck assembly is located between the bridge pile assemblies. The side of the steel arch rib 1 has a through hole. The anti-tilt limit rod 2 is inserted into the through hole. The outside of the anti-tilt limit rod 2 is fitted with a stress interlocking distribution frame 3. The anti-tilt limit rod 2 with a hollow cavity and the anti-tilt limit rod 2 without a hollow cavity are placed alternately. The anti-tilt limit rod 2 located at the odd number position has a hollow cavity. The hollow cavity has a hinged shaft 4 fixed inside. The side of the hinged shaft 4 is hinged with a tilt limit rod 5. Both ends of the anti-tilt limit rod 2 with a hollow cavity are equipped with a suspension cable interlocking assembly. The suspension cable interlocking assembly is a centrally symmetrical structure with the suspension cable as the center.

[0036] By alternately placing anti-tilt limiting rods 2 with hollow cavities and anti-tilt limiting rods 2 without hollow cavities on the steel arch rib 1, not only can the stability of the steel arch rib 1 be guaranteed when subjected to forces other than gravity, but also the controllability of the deformation of the steel arch rib 1 under gravity can be guaranteed, avoiding the exposed abutment 12 from bearing thrust. At the same time, the hollow cavity is also designed to allow the anti-tilt limiting rod 5 to be installed inside the anti-tilt limiting rod 2, so as to ensure the force balance at both ends of the anti-tilt limiting rod 2 and reduce the horizontal force other than gravity on the steel arch rib 1. When the force on one end of the anti-tilt limiting rod 2 is greater than that on the other end, the end with greater force will cause the other end of the anti-tilt limiting rod 5 to tilt up. The tilted end of the anti-tilt limiting rod 5 can be offset by the tension of the anti-tilt limiting rod 2 at this end.

[0037] The suspension interlock assembly includes a suspension cable 6, with suspension booms 7 fixed at both ends of the suspension cable 6. The inclined surfaces at both ends of the suspension booms 7 are attached to the inclined surfaces of the extrusion grooves 8. The extrusion grooves 8 are opened in the middle of the locking arm 9. A cable clamp 10 is fixed at the bottom end of the locking arm 9. The inner wall of the cable clamp 10 is tightly attached to the surface of the suspension cable 6. A hoisting assembly is provided at one end of the locking arm 9. Further, the hoisting assembly includes a hoisting tripod 20 that is hinged to one end of the locking arm 9 via a shaft. The inner wall of the hoisting tripod 20 located at the top is sleeved on the surface of the anti-tilt limit rod 2, and the inner wall of the hoisting tripod 20 located at the bottom is sleeved on the surface of the reinforcing rib 19.

[0038] The further advantage of the above-mentioned method is that when the suspension cable 6 is subjected to increased force, the suspension boom 7 can squeeze the locking boom 9, so that the cable clamp 10 at one end of the locking boom 9 provides friction on the side of the suspension cable 6, thereby delaying the deformation process of the suspension cable 6 and ensuring the stability of the cast bridge deck 14. When resonance is transmitted, the above structure can effectively filter out the resonance energy transmitted to the steel frame arch rib 1, thereby extending the service life of the welded joints on the steel frame arch rib 1 and ensuring that the steel frame arch rib 1 reaches the preset service life.

[0039] A thrust interlock rod 11 is connected to the outer side of the locking arm 9 located at the lower symmetrical end of the suspension interlock assembly via a connecting assembly. Further, the connecting assembly includes a shaft guide frame 21 fixed to the outer side of the locking arm 9, and one end of the shaft guide frame 21 is hinged to the inner wall of the thrust interlock rod 11 via a shaft.

[0040] The further advantage of the above is that the axle connecting frame 21 can connect adjacent suspension interlocking components through the thrust interlocking rod 11, thereby forming a complement between multiple suspension interlocking components, avoiding the risk of suspension cable 6 breaking due to excessive gravity on a certain suspension interlocking component, and at the same time ensuring the stability of the cast bridge deck 14 when it is placed, avoiding the risk of vehicle imbalance caused by the swaying of the cast bridge deck 14.

[0041] When the force on one side of the cast bridge deck 14 increases during use, the suspension cable 6 deforms due to the increased force. The suspension cable 6 pulls the suspension booms 7 at both ends to press against the extrusion groove 8, causing the cable clamp 10 at one end of the locking arm 9 to clamp the suspension cable 6, providing friction to the suspension cable 6 to reduce the deformation stroke of the suspension cable 6 and ensure the stability of the cast bridge deck 14 during placement. At the same time, when the locking arm 9 moves, it will distribute the gravity it receives to an adjacent set of suspension cable interlocking components through the thrust interlocking rod 11, so that the two adjacent suspension cable interlocking components can achieve force complementarity. Meanwhile, the resonance on the cast bridge deck 14 can be slowed down by the friction provided by the cable clamp 10 to the suspension cable 6, thereby offsetting part of the resonance energy.

[0042] When the force is transmitted to the anti-tilt limit rod 2 through the suspension interlock assembly, the end of the anti-tilt limit rod 2 with greater force can cause the other end of the tilt limit rod 5 to tilt up. The tension borne by the anti-tilt limit rod 2 can offset part of the tension at the end with greater force, thus ensuring the stability of the cast bridge deck 14. The steel frame arch rib 1 will deform due to the force on the anti-tilt limit rod 2. The thrust generated by the deformation can be offset by the stress interlocking distribution frame 3, and part of it can also be offset by the thrust interlock rod 11 at the bottom. At this time, the thrust borne by the exposed bridge abutment 12 other than gravity can be greatly reduced, thereby ensuring that the service life of the exposed bridge abutment 12 reaches the expected level. When the vibration frequencies of two adjacent cast bridge decks 14 are different, the vibration can be filtered by the buffer spring 16, so that the vibration of the two adjacent cast bridge decks 14 reaches the same frequency.

[0043] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A prefabricated tied-arch steel structure bridge with interlocking function, comprising bridge pile components, bridge deck components, and steel frame arch ribs (1), characterized in that: The steel frame arch rib (1) is fixed to the top of the bridge pile assembly. The bridge deck assembly is located between the bridge pile assemblies. The side of the steel frame arch rib (1) has a through hole. An anti-tilting limit rod (2) is inserted into the through hole. A stress interlocking distribution frame (3) is sleeved on the outside of the anti-tilting limit rod (2). A hollow cavity is opened inside the anti-tilting limit rod (2) located in the odd position. A hinged shaft rod (4) is fixed inside the hollow cavity. A lateral tilting limit rod (5) is hinged to the side of the hinged shaft rod (4). Suspension cable interlocking assemblies are provided at both ends of the anti-tilting limit rod (2) with the hollow cavity. The suspension cable interlocking assembly has a centrally symmetrical structure with the suspension cable as the center. The suspension cable interlocking assembly includes a suspension cable (6), both ends of which are fixed with a suspension boom (7). The inclined surfaces of both ends of the suspension boom (7) are attached to the inclined surfaces of the extrusion groove (8). The extrusion groove (8) is opened in the middle of the locking arm (9). The bottom end of the locking arm (9) is fixed with a cable clamp (10). The inner wall of the cable clamp (10) is tightly attached to the surface of the suspension cable (6). One end of the locking arm (9) is provided with a hoisting assembly. The outer side of the locking arm (9) located at the lower symmetrical end of the suspension cable interlocking assembly is connected to a thrust interlocking rod (11) through a connecting assembly.

2. A prefabricated tied-arch steel structure bridge with interlocking function according to claim 1, characterized in that, The bridge pile assembly includes exposed abutments (12) fixed to both ends of the steel frame arch rib (1), and foundation piles (13) are fixed to the bottom of the exposed abutments (12).

3. A prefabricated tied-arch steel structure bridge with interlocking function according to claim 2, characterized in that, The bridge deck assembly includes cast bridge deck panels (14) that are attached to the side of the exposed bridge abutment (12), and vibration damping components are provided between two adjacent cast bridge deck panels (14).

4. A prefabricated tied-arch steel structure bridge with interlocking function according to claim 3, characterized in that, The vibration damping component includes a connecting groove (15) opened at one end of the cast bridge deck (14). The top and bottom of the connecting groove (15) are fixed with buffer springs (16). The upper and lower buffer springs (16) are fixed with mating tongues (17) at opposite ends. One end of the mating tongues (17) is fixed to the surface of the adjacent cast bridge deck (14).

5. A prefabricated tied-arch steel structure bridge with interlocking function according to claim 4, characterized in that, The side of the cast bridge deck (14) is provided with an insertion hole (18), and a reinforcing rib (19) is inserted into the insertion hole (18).

6. A prefabricated tied-arch steel structure bridge with interlocking function according to claim 5, characterized in that, The hoisting assembly includes a hoisting tripod (20) hinged to one end of the locking arm (9) via a shaft, wherein the inner wall of the hoisting tripod (20) at the top is fitted onto the surface of the anti-tilt limit rod (2), and the inner wall of the hoisting tripod (20) at the bottom is fitted onto the surface of the reinforcing rib (19).

7. A prefabricated tied-arch steel structure bridge with interlocking function according to claim 1, characterized in that, The connecting assembly includes a shaft guide frame (21) fixed to the outside of the locking arm (9), one end of which is hinged to the inner wall of the thrust interlocking rod (11) via a shaft.

8. A prefabricated tied-arch steel structure bridge with interlocking function according to claim 1, characterized in that, The anti-tilt limit rod (2) with a hollow cavity is placed alternately with the anti-tilt limit rod (2) without a hollow cavity.

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