Bridge system conversion structure

Abstract

The utility model discloses a bridge system conversion structure belongs to the technical field of simply supported beam system conversion for continuous beam system in bridge construction, and the existing bridge structure construction efficiency low problem is solved, and the utility model discloses specifically including the main beam, the main beam includes the mortise and tenon connection's continuous beam left beam section and continuous beam right beam section, and the mortise and tenon connection's position of continuous beam left beam section and continuous beam right beam section is provided with the closure anchor bolt, in the utility model, continuous beam left beam section and continuous beam right beam section are simply supported through the temporary support, and when closing, the mortise and tenon structure on the roof and bottom plate of two are engaged, and then the adhesive cementation is matched, and then the closure bolt is provided, and the system conversion of two cross interval beam sections is realized in the roof one -sided tension external prestress bundle, and finally the main beam is supported through the permanent support. It is convenient to the system conversion of simply supported continuous bridge, speeds up the construction speed of this kind of bridge, shortens the construction period of bridge, and promotes the popularization of simply supported continuous bridge.

Description

Technical Field

[0001] This utility model relates to the technical field of converting a simply supported beam system into a continuous beam system during bridge construction, and particularly to a bridge system conversion structure. Background Technology

[0002] With residents' increasing demands for driving comfort, optimizing bridge structures, reducing the number of expansion joints, and improving the smoothness of transitions between adjacent spans are areas where current technology needs to make breakthroughs. The current mainstream technique for improving driving comfort is the transition from simply supported to continuous structures. During construction, this involves converting temporary supports to permanent supports, adjusting the structural stress system, optimizing structural performance, and improving load-bearing capacity, thus achieving the transformation from simply supported to continuous structures.

[0003] However, existing system conversion structures often involve casting a middle crossbeam at the end of a simply supported beam, tensioning negative moment steel strands inside the top slab and sealing them with anchors, and other processes such as casting wet joints and casting the end crossbeams consume a significant amount of construction time. The steel strands exhibit both horizontal and vertical bends, compromising construction convenience. Furthermore, numerous procedures such as binding prestressed ducts within the steel reinforcement cage, binding the middle crossbeam reinforcement, and curing the middle crossbeam concrete require substantial time. The owner's high demands for project efficiency conflict significantly with the current construction process of simply supported bridges followed by continuous bridges. Therefore, improving the economy and construction efficiency of system conversion structures plays a crucial role in achieving low-carbon, environmentally friendly, and cost-effective engineering. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a bridge system conversion structure that solves the problem of low construction efficiency in existing bridge structures.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows: A bridge system conversion structure includes a main beam; the main beam includes a left beam segment and a right beam segment of a continuous beam connected by mortise and tenon joints; closure anchor bolts are installed at the mortise and tenon joints of the left beam segment and the right beam segment of the continuous beam.

[0006] In this design, the left and right beam segments of the continuous beam are joined together by mortise and tenon joints to form the main beam, and anchor bolts are installed at the mortise and tenon joints for fixation. This structural design accelerates the construction speed of this type of bridge, shortens the construction period, improves construction efficiency, saves construction costs, and makes the entire construction process more efficient and economical.

[0007] Furthermore, a tenon is provided at the end of the left beam segment of the continuous beam near the right beam segment, and a slot corresponding to the tenon is provided at the end of the right beam segment of the continuous beam near the left beam segment; the tenon is embedded in the slot.

[0008] Furthermore, a pre-drilled anchor bolt hole is provided on the tenon, and a closure anchor bolt is inserted into the pre-drilled anchor bolt hole.

[0009] In this scheme, after the closure anchor bolts are installed, the left and right beam segments of the continuous beam are initially fixed to ensure the structural stability after closure.

[0010] Furthermore, two sealing grooves are opened on both sides of the left beam segment of the continuous beam, and the two ends of the closure anchor bolts protrude from the two sealing grooves respectively; the sealing grooves are filled with mortar.

[0011] In this scheme, after the mortar is poured, the closure anchor bolts are encased inside the concrete, which prevents the closure anchor bolts from loosening and ensures the durability of the bolts.

[0012] Furthermore, an adhesive packet is provided on the inner wall of the socket. After the tenon is inserted into the socket, the adhesive packet breaks, and the adhesive overflows to bond the tenon and the socket.

[0013] In this solution, the tenon and socket are mechanically interlocked and fixed, and reinforced with chemical adhesives, which saves the construction time occupied by concrete hardening.

[0014] Furthermore, both the left and right segments of the continuous beam are inverted trapezoidal structures, wider at the top and narrower at the bottom. The top and bottom plates of the left segment are equipped with tenons and sockets, while the top and bottom plates of the right segment are equipped with slots and sockets. The tenons and sockets on the top plate of the left segment are mortised and tenoned with the slots and sockets on the top plate of the right segment. The tenons and sockets on the bottom plate of the left segment are mortised and tenoned with the slots and sockets on the bottom plate of the right segment.

[0015] In this scheme, the system conversion of the two span beam segments is achieved by interlocking the mortise and tenon structure on the top and bottom plates, embedding and bonding, anchoring transverse stiffening bolts in the reserved holes, and tensioning external prestressed steel strands on one side of the top plate.

[0016] Furthermore, prestressed corrugated pipes are installed inside the left and right beam segments of the continuous beam, and external prestressing tendons are inserted inside the prestressed corrugated pipes. Two internal cavity toothed blocks are installed in the left and right beam segments of the continuous beam, and anchors are fixed on both internal cavity toothed blocks. One end of the external prestressing tendon is fixed to one of the anchors, and the other end of the external prestressing tendon is fixed to the other anchor.

[0017] In this scheme, anchorages are used to tension and anchor the left and right beam segments of the continuous beam to ensure that the left and right beam segments of the continuous beam are completely closed.

[0018] The beneficial effects of this utility model are: The bridge system conversion structure provided by this utility model involves simply supporting the left and right segments of a continuous beam using temporary supports. During subsequent closure, the top and bottom plates of the two segments interlock using mortise and tenon joints, and are then bonded together with adhesive to form the main beam. Transverse stiffening bolts are anchored in pre-drilled anchor bolt holes, and external prestressing tendons are tensioned on one side of the top plate to achieve the system conversion between the two spans. Finally, the main beam is supported by permanent supports. This overall structural design facilitates the system conversion of simply supported to continuous bridges, accelerates the construction speed of this type of bridge, shortens the construction period, saves construction costs, and promotes the widespread adoption of simply supported to continuous bridges. Compared to existing bridge system conversion structures that use cast-in-place wet joints and cast-in-place end beams, this design does not rely on cast-in-place concrete beams and wet joints, saving concrete hardening time and shortening bridge construction time. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the planar structure of a bridge system conversion structure according to the present invention; Figure 2 This is a schematic diagram of the cross-sectional structure of a bridge system conversion structure according to the present invention; Figure 3 This is a schematic diagram of the longitudinal section of a bridge system conversion structure according to the present invention.

[0020] Figure label: 1. Main beam; 2. Left segment of continuous beam; 3. Right segment of continuous beam; 4. Prestressed corrugated pipe; 5. Tenon and socket joint; 6. Socket and slot joint; 7. Reserved anchor bolt hole; 8. Sealing groove; 9. Closure anchor bolt; 10. Inner cavity toothed block; 11. Anchorage; 12. External prestressed tendon; Detailed Implementation The present invention will be further described below with reference to the accompanying drawings and specific embodiments. The specific embodiments of the present invention are described below to facilitate understanding by those skilled in the art. However, it should be understood that the present invention is not limited to the scope of the specific embodiments. For those skilled in the art, various changes are obvious as long as they fall within the spirit and scope of the present invention as defined and determined by the appended claims. All inventions utilizing the concept of the present invention are protected.

[0021] like Figures 1-3 As shown, this embodiment provides a bridge system conversion structure, which has the advantages of shortening the construction period of the bridge, improving the construction quality of the main beam 1, and saving engineering costs. Specifically, it includes the main beam 1; the main beam 1 includes a continuous beam left segment 2 and a continuous beam right segment 3 connected by mortise and tenon joints; closure anchor bolts 9 are installed at the mortise and tenon joints of the continuous beam left segment 2 and the continuous beam right segment 3.

[0022] A tenon 5 is provided at one end of the left beam segment 2 of the continuous beam near the right beam segment 3 of the continuous beam, and a slot 6 corresponding to the tenon 5 is provided at one end of the right beam segment 3 of the continuous beam near the left beam segment 2 of the continuous beam; the tenon 5 is embedded in the slot 6.

[0023] The tenon 5 has a pre-drilled anchor bolt hole 7, and a closure anchor bolt 9 is inserted into the pre-drilled anchor bolt hole 7. After the closure anchor bolt 9 is inserted, the left beam segment 2 and the right beam segment 3 of the continuous beam are initially fixed to ensure the structural stability after closure.

[0024] Two sealing grooves 8 are respectively opened on both sides of the left beam segment 2 of the continuous beam. The two ends of the closure anchor bolt 9 are respectively passed through the two sealing grooves 8; the sealing grooves 8 are filled with mortar. After the mortar is poured, the closure anchor bolt 9 is encased in concrete, which prevents the closure anchor bolt 9 from loosening and ensures the durability of the bolt.

[0025] An adhesive packet is provided on the inner wall of the socket 6. After the tenon 5 is inserted into the socket 6, the adhesive packet breaks, and the adhesive overflows to bond the tenon 5 and the socket 6. The tenon 5 and the socket 6 are mechanically interlocked and fixed, and reinforced with chemical adhesive, which saves the construction time occupied by concrete hardening.

[0026] As a preferred embodiment, the adhesive is preferably epoxy resin.

[0027] like Figure 2 As shown, both the left beam segment 2 and the right beam segment 3 of the continuous beam are inverted trapezoidal structures, wider at the top and narrower at the bottom. The top and bottom plates of the left beam segment 2 are equipped with tenons 5, while the top and bottom plates of the right beam segment 3 are equipped with slots 6. The tenons 5 on the top plate of the left beam segment 2 are mortised and tenoned with the slots 6 on the top plate of the right beam segment 3; similarly, the tenons 5 on the bottom plate of the left beam segment 2 are mortised and tenoned with the slots 6 on the bottom plate of the right beam segment 3. Through the interlocking and bonding of the tenons and mortises on the top and bottom plates, transverse stiffening bolts are anchored in pre-drilled holes, and external prestressed steel strands are tensioned on one side of the top plate to achieve the system conversion between the two span beam segments.

[0028] like Figure 3 As shown, prestressed corrugated pipes 4 are installed inside the left beam segment 2 and the right beam segment 3 of the continuous beam. External prestressing tendons 12 are threaded through the prestressed corrugated pipes 4. Each of the left beam segment 2 and the right beam segment 3 has two internal cavity toothed blocks 10, and each internal cavity toothed block 10 is fixed with an anchor 11. One end of the external prestressing tendon 12 is fixed to one of the anchors 11, and the other end of the external prestressing tendon 12 is fixed to the other anchor 11. The anchors 11 are used to tension and anchor the left beam segment 2 and the right beam segment 3 of the continuous beam, ensuring complete closure of the two segments.

[0029] Example 2 This embodiment, based on the bridge system transfer structure provided in Embodiment 1, provides a construction method for a bridge system transfer structure; the specific construction steps are as follows: Step S1: Place the left beam segment 2 and the right beam segment 3 of the continuous beam on the temporary support, then horizontally push the right beam segment 3 of the continuous beam to complete the beam segment alignment, and let it stand still for 2 hours.

[0030] Step S2: When the beam segments come together, the tenon 5 is inserted into the socket 6 and then the adhesive packet is broken. The adhesive overflows and bonds the tenon 5 and the socket 6, quickly reinforcing the joint.

[0031] Step S3: After the adhesive has reached the required strength, insert the closure anchor 9 into the reserved anchor hole 7 to perform permanent anchoring of the closure anchor 9. Make sure the bolt and nut are locked.

[0032] Step S4: After the anchor bolt 9 is anchored, fill the sealing groove 8 with sealing mortar to ensure the durability of the bolt.

[0033] Step S5: After the concrete has reached the required strength, cut the expansion bolts used for temporary fixation, apply lubricant to the groove, push the upper and lower leveling steel plates together, and at the same time, the support will also close together as one unit.

[0034] Step S6: Insert the external prestressed tendon 12 into the prestressed corrugated pipe 4, and tension and anchor the external prestressed tendon 12 to both ends of the inner cavity tooth block 10 through the anchor 11.

[0035] Step S7: Replace the double-row temporary supports at the midpoint with a single-row permanent support, so that the main beam 1 is transformed from a simply supported beam system into a continuous beam system.

[0036] Those skilled in the art will recognize that the embodiments described herein are intended to help the reader understand the principles of this invention, and should be understood that the scope of protection of this invention is not limited to such specific statements and embodiments. Those skilled in the art can make various other specific modifications and combinations based on these technical teachings disclosed in this invention without departing from the essence of this invention, and these modifications and combinations are still within the scope of protection of this invention.

Claims

1. A bridge system transfer structure, characterized in that: It includes a main beam (1); the main beam (1) includes a left beam segment (2) and a right beam segment (3) of a continuous beam connected by mortise and tenon joints; the left beam segment (2) and the right beam segment (3) of the continuous beam are provided with closure anchor bolts (9) at the mortise and tenon joints.

2. The bridge system transfer structure according to claim 1, characterized in that: The left beam segment (2) of the continuous beam is provided with a tenon (5) at one end near the right beam segment (3) of the continuous beam, and the right beam segment (3) of the continuous beam is provided with a slot (6) corresponding to the tenon (5) at one end near the left beam segment (2) of the continuous beam; the tenon (5) is embedded in the slot (6).

3. The bridge system transfer structure according to claim 2, characterized in that: The tenon (5) is provided with a reserved anchor bolt hole (7), and a closure anchor bolt (9) is inserted into the reserved anchor bolt hole (7).

4. The bridge system transfer structure according to claim 3, characterized in that: Two sealing grooves (8) are opened on both sides of the left beam segment (2) of the continuous beam, and the two ends of the closure anchor bolt (9) are respectively passed through the two sealing grooves (8); the sealing grooves (8) are filled with mortar.

5. The bridge system transfer structure according to claim 2, characterized in that: An adhesive packet is provided on the inner wall of the socket (6). After the tenon (5) is inserted into the socket (6), the adhesive packet breaks and the adhesive overflows to bond the tenon (5) and the socket (6).

6. The bridge system transfer structure according to claim 2, characterized in that: Both the left beam segment (2) and the right beam segment (3) of the continuous beam are inverted trapezoidal structures with a larger upper section and a smaller lower section. The top and bottom plates of the left beam segment (2) of the continuous beam are provided with tenons (5), and the top and bottom plates of the right beam segment (3) of the continuous beam are provided with slots (6). The tenons (5) on the top plate of the left beam segment (2) of the continuous beam are mortised and tenoned with the slots (6) on the top plate of the right beam segment (3). The tenons (5) on the bottom plate of the left beam segment (2) of the continuous beam are mortised and tenoned with the slots (6) on the bottom plate of the right beam segment (3).

7. The bridge system transfer structure according to any one of claims 2 to 6, characterized in that: The left beam segment (2) and the right beam segment (3) of the continuous beam are provided with prestressed corrugated pipes (4), and external prestressed tendons (12) are inserted inside the prestressed corrugated pipes (4). The left beam segment (2) and the right beam segment (3) of the continuous beam are respectively provided with two inner cavity tooth blocks (10), and anchors (11) are fixed on both inner cavity tooth blocks (10). One end of the external prestressed tendon (12) is fixed on one of the anchors (11), and the other end of the external prestressed tendon (12) is fixed on the other anchor (11).

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