A closure locking framework for the concrete main girder of high-speed railway and its construction method

Abstract

The present invention provides a closing and locking framework for a high-speed railway concrete main girder, which includes a steel strand corrugated pipe, a linear observation mark, a suspension hanger, a closing and locking framework and a closing section. The closing and locking framework uses a channel steel as the main locking framework girder. Both sides of the closing section have closing section main girders. The channel steel is connected to the closing section main girders. Transverse connecting steel plates are installed at the top and bottom of the channel steel through bolts. The present invention has the following beneficial effects: By setting the transverse connecting steel plates, the overall stiffness of the closing and locking framework is improved, ensuring the coordinated deformation on both sides of the closing section during construction and not generating a large relative displacement, thereby ensuring that the alignment of the closing section meets the design requirements. The main components adopt a bolt connection form, which is convenient for installation and disassembly, reduces the operation difficulty of the staff, and improves the construction speed. By setting a lateral limit fine-tuning device, the high-precision installation of the closing and locking framework is ensured, and at the same time, it is ensured that it does not generate deviation during construction.

Description

Technical Field

[0001] The present invention relates to a closure locking framework for a high - speed railway concrete main girder and a construction method, belonging to the construction field. Background Art

[0002] As a statically indeterminate structure for multiple times, the linear shape of the main girder of a low - tower cable - stayed bridge and the dead load internal force of the completed bridge are closely related to the construction method and construction sequence. The stress of the closure segment is complex and involves multiple system conversions. To ensure that the linear shape of the main girder meets the design requirements and the construction of the closure segment is safe and reliable, a reasonable, efficient, and safe method is required for the construction operation of the closure segment.

[0003] Before the concrete pouring of the closure segment in the prior art, there is no efficient and high - quality closure locking scheme, so it is impossible to ensure that the closure opening does not undergo excessive deformation during the construction of the closure segment.

[0004] Therefore, the applicant proposes a technical solution that pre - embeds horizontal steel bars and a group of vertical steel plates in the adjacent main girders of the closure segment, welds the two into one body to ensure the stability of the closure locking framework, and designs a lateral limit fine - tuning device to ensure the installation accuracy of the closure locking framework and no deviation during the construction period. Summary of the Invention

[0005] Aiming at the deficiencies of the prior art, the purpose of the present invention is to provide a closure locking framework for a high - speed railway concrete main girder and a construction method. To achieve the above purpose, the present invention is realized through the following technical solutions:

[0006] A closure locking framework for a high - speed railway concrete main girder includes a steel - strand corrugated pipe, a linear observation mark, a hanger, a closure locking framework, and a closure segment. The closure locking framework uses a channel steel as the main beam of the locking framework. The two sides of the closure segment have main girders of the closure segment. The channel steel is connected to the main girders of the closure segment. Transverse connection steel plates are installed at the top and bottom of the channel steel through bolts. An enhanced connection component is arranged between the transverse connection steel plates. Lateral limit fine - tuning devices are installed on both sides of the closure locking framework. The closure locking framework is installed on the steel - strand corrugated pipe, and the linear observation mark and the hanger are arranged on the steel - strand corrugated pipe.

[0007] Furthermore, a group of vertical steel plates is pre - embedded in the main girders of the closure segment. The group of vertical steel plates is composed of multiple vertical steel plates. Horizontal steel bars that are horizontally arranged and welded to the vertical steel plates are pre - embedded inside the main girders of the closure segment.

[0008] Further, the strengthening connection component includes two connection grooves on one side of the transverse connection steel plate. A connection steel plate is rotatably connected in the connection groove. Two secondary connection grooves are also formed on the other side of the transverse connection steel plate. A secondary connection steel plate is rotatably connected in each of the secondary connection grooves. The secondary connection steel plate is a T-shaped plate corresponding to the connection steel plate, and a corresponding groove is formed on each of the connection steel plates. The end of the secondary connection steel plate is inserted into the corresponding corresponding groove.

[0009] Further, a locking component is provided between the connection steel plate and the secondary connection steel plate. The locking component includes a sleeve fixed to the back of the connection steel plate through a fixing column. A pull rod is inserted into the sleeve. A connecting rod is fixedly provided on one end surface of the pull rod. The connecting rod penetrates through the connection steel plate, and a resisting rod is fixedly provided at the penetrating end of the connecting rod. A resisting groove corresponding to the resisting rod is formed on the end surface of the secondary connection steel plate. A spring sleeved on the outer surface of the resisting rod is fixedly provided between one end surface of the pull rod and the inner wall of the sleeve.

[0010] Further, the limit fine-tuning device includes a fixing plate embedded and fixed on the closure segment main girder. A threaded resisting rod is threadedly inserted through the fixing plate, and a locking nut is provided in cooperation with the threaded resisting rod.

[0011] A construction method for a closure locking skeleton of a concrete main girder includes the following steps: S1. Hanging basket in place: Using the hanging bracket and the concrete formwork system as the formwork framework for the closure segment hanging basket;

[0012] S2. Prestressed steel strand threading for the closure segment: Install the steel strand corrugated pipe with prestress at the predetermined position and carry out the prestressed steel strand threading work;

[0013] S3. Linear observation: Continuously observe the linear shape of the closure segment using the linear observation mark to determine the linear shape adjustment plan for the closure segment;

[0014] S4. Linear shape adjustment: Adjust the linear shape of the closure segment by means of counterweight and jacking to ensure that it meets the design requirements;

[0015] S5. Install the closure locking skeleton;

[0016] S6. Tie the ordinary steel bars for the closure segment: Tie the ordinary steel bars inside the formwork;

[0017] S7. Pour concrete: Pour the concrete for the closure segment at the designed ambient temperature;

[0018] S8. Tension the prestressed steel strand: When the concrete strength and elastic modulus reach the design requirements, tension the prestressed steel strand for the closure segment;

[0019] S9. Demolish the auxiliary equipment: Demolish the auxiliary equipment of the hanging basket and the closure locking framework.

[0020] Further, in step S5, the closure locking framework specifically includes the following steps:

[0021] S5.1. Assemble the main beam of the closure locking framework: Use the channel steel as the main beam of the locking framework, and connect it with the vertical steel plates embedded in the main beams on both sides of the closure section through bolts to form an integral whole;

[0022] S5.2. Install the transverse connecting steel plates: Install four transverse connecting steel plates at equal intervals on the top and bottom plates of the channel steel by bolt connection to improve the overall stiffness of the structure;

[0023] S5.3. Install the lateral limit fine-tuning device: Install the lateral limit fine-tuning device on the side of the closure locking framework. After achieving high-precision positioning through fine-tuning, limit the lateral displacement of the closure locking framework to ensure that the closure locking framework does not shift during the construction process.

[0024] Further, in step S5.1, horizontally embedded transverse steel bars and vertical steel plates are pre-embedded in the main beams on both sides of the closure section and welded together to form an integral whole, increasing the anchoring force and improving the reliability. Multiple vertical steel plates cooperate to form a group of vertical steel plates. By setting up the group of vertical steel plates, the concrete vibration operation space is expanded to ensure that the concrete is vibrated densely.

[0025] Further, in step S5.2, the transverse connecting steel plates are installed in a bolt connection form, so the installation and disassembly of the transverse connecting steel plates are convenient, improving the construction speed.

[0026] Advantages of the present invention:

[0027] By pre-embedding horizontal steel bars and a group of vertical steel plates in the main beams on both sides of the closure section and welding them together to form an integral whole, the anchoring force is increased, ensuring the safety and reliability of the force transmission device.

[0028] By setting up a group of vertical steel plates, the concrete vibration operation space is expanded to ensure that the concrete is vibrated densely.

[0029] By setting up transverse connecting steel plates, the overall stiffness of the closure locking framework is improved, ensuring that the deformation on both sides of the closure section is coordinated during construction and no large relative displacement occurs, thus ensuring that the alignment of the closure section meets the design requirements.

[0030] The main components adopt bolt connection forms, which are convenient for installation and disassembly, reducing the operation difficulty of the staff and improving the construction speed.

[0031] By setting up a lateral limit fine-tuning device, the high-precision installation of the closure locking framework is ensured, and at the same time, it is ensured that it does not shift during construction. Brief Description of the Drawings

[0032] Other features, objects, and advantages of the present invention will become more apparent from the following detailed description of non - limiting embodiments read in conjunction with the accompanying drawings:

[0033] Figure 1 Schematic diagram of the closure - locking framework arrangement for an embodiment of the present invention;

[0034] Figure 2 Front view of the closure - locking framework for an embodiment of the present invention;

[0035] Figure 3 Top view of the closure - locking framework for an embodiment of the present invention;

[0036] Figure 4 Schematic diagram of the linear observation mark and hanger arrangement for an embodiment of the present invention;

[0037] Figure 5 Schematic diagram of the strengthening connection assembly for an embodiment of the present invention;

[0038] Figure 6 Schematic diagram of the counter - groove for an embodiment of the present invention;

[0039] Figure 7 Schematic diagram of the locking assembly for an embodiment of the present invention.

[0040] In the figures: 1, steel strand corrugated pipe; 2, closure - locking framework; 3, closure - segment main girder; 4, transverse steel bars; 5, vertical steel plates; 6, channel steel; 7, transverse connection steel plates; 8, linear observation mark; 9, hanger; 10, bolts; 11, limit fine - tuning device; 12, closure segment; 13, connection groove; 14, connection steel plate; 15, secondary connection steel plate; 16, corresponding groove; 17, sleeve; 18, fixing plate; 19, threaded counter - rod; 20, locking nut; 21, pull rod; 22, spring; 23, connecting rod; 24, counter - rod; 25, counter - groove. Detailed Description of the Preferred Embodiments

[0041] To make the technical means, creative features, achieved purposes, and functions of the present invention easy to understand, the present invention will be further described below in conjunction with specific embodiments.

[0042] Please refer to Figures 1-4, the present invention provides a technical solution: a closure locking framework for a high-speed railway concrete main girder, comprising a steel strand corrugated pipe 1, a linear observation mark 8, a hanging bracket 9, a closure locking framework 2 and a closure segment 12. The closure locking framework 2 uses a channel steel 6 as the locking framework main girder. Both sides of the closure segment 12 have closure segment main girders 3. The channel steel 6 is connected to the closure segment main girders 3. Horizontal connecting steel plates 7 are installed at the top and bottom of the channel steel 6 through bolts 10. A strengthening connection assembly is provided between the horizontal connecting steel plates 7. Limiting and fine-tuning devices 11 are installed on both side surfaces of the closure locking framework 2. The closure locking framework 2 is installed on the steel strand corrugated pipe 1. The linear observation mark 8 and the hanging bracket 9 are arranged on the steel strand corrugated pipe 1.

[0043] Refer to Figure 3 , vertical steel plate groups are pre-embedded in the closure segment main girders 3. The vertical steel plate groups are composed of multiple vertical steel plates 5. Horizontal steel bars 4 which are horizontal and welded to the vertical steel plates 5 are pre-embedded inside the closure segment main girders 3. The vertical steel plates 5 are connected to the channel steel 6, thus forming an integral body in cooperation with bolt connection.

[0044] Refer to Figures 5-7, the reinforcing connection assembly includes two connection grooves 13 on one side of the transverse connection steel plate 7. A connection steel plate 14 is rotatably connected in the connection groove 13. Two secondary connection grooves are also formed on the other side of the transverse connection steel plate 7. A secondary connection steel plate 15 is rotatably connected in each of the secondary connection grooves. The secondary connection steel plate 15 is a T-shaped plate corresponding to the connection steel plate 14. A corresponding groove 16 is formed on each of the connection steel plates 14. The end of the secondary connection steel plate 15 is inserted into the corresponding corresponding groove 16. A locking assembly is provided between the connection steel plate 14 and the secondary connection steel plate 15. The locking assembly includes a sleeve 17 fixed to the back of the connection steel plate 14 by a fixing column. A pull rod 21 is inserted into the sleeve 17. A connecting rod 23 is fixedly provided on one end surface of the pull rod 21. The connecting rod 23 penetrates through the connection steel plate 14. A resisting rod 24 is fixedly provided at the penetrating end of the connecting rod 23. A resisting groove 25 corresponding to the resisting rod 24 is formed on the end surface of the secondary connection steel plate 15. A spring 22 sleeved on the outer surface of the resisting rod 24 is fixedly provided between one end surface of the pull rod 21 and the inner wall of the sleeve 17. Four pieces of the transverse connection steel plates 7 are installed at equal intervals on the top and bottom plates of the channel steel 6 to improve the overall stiffness of the structure. And some reinforcing connection assemblies are designed to ensure that adjacent transverse connection steel plates 7 are also connected. Therefore, the stiffness of the whole structure is better. Specifically, the secondary connection steel plate 15 and the connection steel plate 14 are pulled out from the corresponding connection grooves. Then the end of the secondary connection steel plate 15 is inserted into the corresponding corresponding groove 16. The pull rod 21 is pushed in advance, so as to push the designed spring to stretch and ensure that the length of the connecting rod 23 extends. In this way, the end of the secondary connection steel plate 15 can smoothly avoid being blocked by the resisting rod 24. The end of the secondary connection steel plate 15 is inserted into the corresponding corresponding groove 16. Finally, the pull rod 21 is released, and the spring stretches and drives the connecting rod 23 to retract. Therefore, it is ensured that the end of the resisting rod 24 is inserted into the resisting groove 25 to complete the fixation of the connection steel plate 14 and the secondary connection steel plate 15. And the connection stability between them is relatively high. And no tools are required for installation during installation, ensuring convenient installation and better use effect. The connection steel plate 14 and the secondary connection steel plate 15 can be stored inside the corresponding grooves.

[0045] Refer to Figures 2-3 , the limit fine-tuning device 11 includes a fixing plate 18 embedded and fixed on the closure segment main girder 3. A threaded resisting rod 19 is threadedly penetrated through the fixing plate 18. A locking nut 20 is provided in cooperation with the threaded resisting rod 19. After high-precision positioning is achieved through fine-tuning, the lateral displacement of the closure locking framework is restricted to ensure that the closure locking framework does not deviate during the construction process. The threaded resisting rod 19 can be rotated so that the end of the threaded resisting rod 19 abuts against the closure locking framework. Therefore, it is ensured that the closure locking framework does not deviate.

[0046] A construction method for the closure and locking framework of a concrete main girder, comprising the following steps: S1. Hanging basket positioning: Using the hanging bracket 9 and the concrete formwork system as the formwork framework for the closure section of the hanging basket;

[0047] S2. Prestressed steel strand threading for the closure section: Install the steel strand corrugated pipe 1 with prestress at the predetermined position and carry out the work of threading the prestressed steel strand;

[0048] S3. Linear observation: Continuously observe the linearity of the closure section using the linear observation mark 8 to determine the linear adjustment plan for the closure section;

[0049] S4. Linear adjustment: Adjust the linearity of the closure section by means of counterweight and jacking to ensure that it meets the design requirements;

[0050] S5. Install the closure and locking framework 2;

[0051] S6. Tie the ordinary steel bars for the closure section: Tie the ordinary steel bars inside the formwork;

[0052] S7. Pour concrete: Pour the concrete for the closure section at the designed ambient temperature;

[0053] S8. Tension the prestressed steel strand: When the concrete strength and elastic modulus reach the design requirements, tension the prestressed steel strand for the closure section;

[0054] S9. Remove the auxiliary equipment: Remove the auxiliary equipment of the hanging basket and the closure and locking framework.

[0055] In step S5, the closure and locking framework 2 specifically includes the following steps:

[0056] S5.1. Assemble the main girder of the closure and locking framework: Use the channel steel 6 as the main girder of the locking framework and connect it with the vertical steel plates 5 embedded in the main girders 3 on both sides of the closure section 12 by bolts to form an integral whole;

[0057] S5.2. Install the transverse connection steel plates 7: Install four pieces of the transverse connection steel plates 7 at equal intervals on the top and bottom plates of the channel steel 6 by bolt connection to improve the overall stiffness of the structure;

[0058] S5.3. Install the lateral limit and fine-tuning device 11: Install the lateral limit and fine-tuning device 11 on the side of the closure and locking framework. After achieving high-precision positioning through fine-tuning, limit the lateral displacement of the closure and locking framework to ensure that the closure and locking framework does not shift during the construction process.

[0059] In the step S5.1, horizontal transverse steel bars 4 and vertical steel plates 5 are embedded in the closure segment main girder 3 and welded together to form an integral body, increasing the anchoring force and improving the reliability. A plurality of the vertical steel plates 5 cooperate to form a group of vertical steel plates. By setting the group of vertical steel plates, the vibrating operation space of the concrete is enlarged, ensuring that the concrete is vibrated densely.

[0060] In the step S5.2, the transverse connecting steel plate 7 is installed by means of bolt connection. Therefore, the installation and disassembly of the transverse connecting steel plate 7 are convenient, improving the construction speed.

[0061] During use, by embedding horizontal steel bars and a group of vertical steel plates in the main girders on both sides of the closure segment and welding them together to form an integral body, the anchoring force is increased, ensuring the safety and reliability of the force transmission device.

[0062] By setting the group of vertical steel plates, the vibrating operation space of the concrete is enlarged, ensuring that the concrete is vibrated densely.

[0063] By setting the transverse connecting steel plate, the overall stiffness of the closure locking framework is improved, ensuring the deformation coordination on both sides of the closure segment during construction and not generating a large relative displacement, thereby ensuring that the alignment of the closure segment meets the design requirements.

[0064] The main components adopt the bolt connection form, which is convenient for installation and disassembly, reducing the operation difficulty of the staff and improving the construction speed.

[0065] By setting the lateral limit fine-tuning device, the high-precision installation of the closure locking framework is ensured, and at the same time, it is ensured that it does not shift during construction.

[0066] This application adopts embedding horizontal steel bars and a group of vertical steel plates in the adjacent main girders of the closure segment and welding them into an integral body to ensure the stability of the closure locking framework. By setting the group of vertical steel plates, the vibrating operation space of the concrete is enlarged, ensuring that the concrete is vibrated densely; then connecting the channel steel with the group of vertical steel plates on both sides by bolts to form the closure locking framework; then installing four transverse connecting steel plates at equal intervals on the top plate and bottom plate of the channel steel by bolt connection to improve the structural stiffness and ensure its safety and reliability; finally, installing the lateral limit fine-tuning device on the side of the closure locking framework to ensure the installation accuracy of the closure locking framework and no deviation during construction.

[0067] Although this specification is described according to the embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A closure locking framework for the concrete main girder of high-speed railway, characterized in that: It includes a steel strand corrugated pipe (1), a linear observation mark (8), a hanger (9), a closure locking framework (2) and a closure segment (12). The closure locking framework (2) uses a channel steel (6) as the main beam of the locking framework. Both sides of the closure segment (12) have closure segment main beams (3). The channel steel (6) is connected to the closure segment main beam (3). Transverse connection steel plates (7) are installed at the top and bottom ends of the channel steel (6) through bolts (10). A strengthening connection assembly is provided between the transverse connection steel plates (7). Limiting and fine-tuning devices (11) are installed on both side surfaces of the closure locking framework (2). The closure locking framework (2) is installed on the steel strand corrugated pipe (1). The linear observation mark (8) and the hanger (9) are arranged on the steel strand corrugated pipe (1). The strengthening connection assembly includes two connection grooves (13) on one side surface of the transverse connection steel plate (7). A connection steel plate (14) is rotatably connected in the connection groove (13). Two secondary connection grooves are also opened on the other side surface of the transverse connection steel plate (7). A secondary connection steel plate (15) is rotatably connected in each of the secondary connection grooves. The secondary connection steel plate (15) is a T-shaped plate corresponding to the connection steel plate (14). A corresponding groove (16) is opened on each of the connection steel plates (14). The end of the secondary connection steel plate (15) is inserted into the corresponding corresponding groove (16). A locking assembly is provided between the connection steel plate (14) and the secondary connection steel plate (15). The locking assembly includes a sleeve (17) fixed to the back surface of the connection steel plate (14) through a fixing column. A pull rod (21) is inserted into the sleeve (17). A connecting rod (23) is fixed to one end surface of the pull rod (21). The connecting rod (23) penetrates through the connection steel plate (14). A resisting rod (24) is fixed to the penetrating end of the connecting rod (23). A resisting groove (25) corresponding to the resisting rod (24) is opened on the end surface of the secondary connection steel plate (15). A spring (22) sleeved on the outer surface of the resisting rod (24) is fixed between one end surface of the pull rod (21) and the inner wall of the sleeve (17).

2. The closure locking framework of a high-speed railway concrete main beam according to claim 1, characterized in that: Vertical steel plate groups are pre-embedded in the closure segment main beam (3). The vertical steel plate groups are composed of a plurality of vertical steel plates (5). Horizontally arranged transverse steel bars (4) welded to the vertical steel plates (5) are pre-embedded inside the closure segment main beam (3).

3. A closure locking framework for a high-speed railway concrete main girder according to claim 2, characterized in that: The limiting and fine-tuning device (11) includes a fixing plate (18) embedded and fixed on the closure segment main beam (3). A threaded resisting rod (19) is threadedly penetrated through the fixing plate (18). A locking nut (20) is cooperatively provided on the threaded resisting rod (19).

4. A construction method for the closure and locking framework of a concrete main beam, characterized in that, For the construction of the closure locking framework of the high-speed railway concrete main beam according to any one of claims 1-3, it includes the following steps: S1. Hanging basket in place: Using the hanger (9) and the concrete formwork system as the formwork framework of the closure segment hanging basket; S2. Prestressed steel tendon threading for the closure segment: Install the steel tendon corrugated pipe (1) for prestress at the predetermined position and carry out the work of threading the prestressed steel tendon. S3. Linear shape observation: Continuously observe the linear shape of the closure segment using the linear shape observation mark (8) to determine the linear shape adjustment plan for the closure segment. S4. Linear shape adjustment: Adjust the linear shape of the closure segment by means of counterweight and jacking to ensure that it meets the design requirements. S5. Install the closure locking framework (2). S6. Tie the ordinary steel bars of the closure segment: Tie the ordinary steel bars inside the formwork. S7. Pour concrete: Pour the concrete of the closure segment at the designed ambient temperature. S8. Tension the prestressed steel tendon: When the concrete strength and elastic modulus reach the design requirements, tension the prestressed steel tendon of the closure segment. S9. Remove the auxiliary equipment: Remove the auxiliary equipment of the hanging basket and the closure locking framework.

5. The construction method of a closure locking framework for a concrete main girder according to claim 4, characterized in that, In step S5, the specific steps of the closure locking framework (2) are as follows: S5.

1. Assemble the main beam of the closure locking framework: Use the channel steel (6) as the main beam of the locking framework and connect it with the vertical steel plates (5) embedded in the main beams (3) of both sides of the closure segment (12) by bolts to form an integral whole. S5.

2. Install the transverse connection steel plates (7): Install four pieces of the transverse connection steel plates (7) at equal intervals on the top and bottom plates of the channel steel (6) by bolt connection to improve the overall stiffness of the structure. S5.

3. Install the lateral limit fine-tuning device (11): Install the lateral limit fine-tuning device (11) on the side of the closure locking framework. After achieving high-precision positioning through fine-tuning, limit the lateral displacement of the closure locking framework to ensure that the closure locking framework does not deviate during the construction process.

6. The construction method of a concrete main girder closure locking framework according to claim 5, characterized in that, In step S5.1, horizontal transverse steel bars (4) and the vertical steel plates (5) are embedded in the main beam (3) of the closure segment and welded together to increase the anchoring force and improve the reliability. Multiple vertical steel plates (5) cooperate to form a group of vertical steel plates. By setting the group of vertical steel plates, the concrete vibration operation space is expanded to ensure that the concrete is vibrated densely.

7. The construction method of a concrete main girder closure locking framework according to claim 6, characterized in that, In step S5.2, the transverse connection steel plates (7) are installed in a bolt connection form, so the installation and disassembly of the transverse connection steel plates (7) are convenient, which improves the construction speed.

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