Precise assembly construction structure for large-span stiff skeleton concrete arch bridge

Abstract

The utility model relates to the technical field of stiff skeleton concrete arch bridge splicing, in particular to a large-span stiff skeleton concrete arch bridge precise splicing construction structure which comprises two bases, a plurality of arch ring skeletons are arranged on the opposite sides of the two bases, and a plurality of steel ropes are arranged on the tops of the arch ring skeletons. The hoisting mechanism is arranged at the top of the base; according to the device, the arch ring framework is hoisted through the first screws, the fixing disc, the rope limiting frame and the pulleys, the arch ring framework, the steel rope and the fixing base form a triangular fulcrum, the hoisting bearing capacity of the arch ring framework is improved, and compared with an existing mode that the arch ring is vertically hoisted, the assembled arch ring is prone to displacement in the pouring process, and the hoisting efficiency is improved. According to the mode, the arch ring framework, the steel rope and the fixing base form a triangular fulcrum, the stability of the arch ring framework after hoisting and splicing is improved, and it is guaranteed that the spliced arch ring framework does not displace in the concrete pouring process.

Description

Technical Field

[0001] This utility model relates to the field of splicing technology for rigid frame concrete arch bridges, and in particular to a precision assembly and construction structure for large-span rigid frame concrete arch bridges. Background Technology

[0002] A rigid-frame concrete arch bridge is a structural system composed of a steel frame and concrete working together. The assembly precision of the steel frame directly affects the overall load-bearing performance and safety of the bridge. To ensure construction efficiency, the arch rings and frame of long-span rigid-frame concrete arch bridges are typically manufactured and processed precisely in a factory and then transported to the site for assembly. This construction method greatly improves construction precision and efficiency, and reduces the difficulty and time required for on-site construction.

[0003] According to the search, the Chinese patent "A Precision Assembly Construction Structure for a Large-Span Stiff Frame Concrete Arch Bridge" (authorization announcement number "CN214089440U") uses towers, traction cables, connecting cables and hangers to achieve vertical traction of the arch rings, thereby sharing the supporting force and improving the stability of the assembly between the arch rings.

[0004] In the aforementioned application, because the arch ring has a certain weight, the vertical traction on the arch ring during the concrete pouring process causes the connecting steel cables and hangers to be subjected to a large traction force, which can easily lead to displacement of the spliced ​​arch ring, thereby affecting the construction effect of the large-span stiffened frame concrete arch bridge.

[0005] Therefore, a precise assembly and construction structure for large-span stiffness frame concrete arch bridges is proposed to solve the above problems. Utility Model Content

[0006] The purpose of this utility model is to provide a precise assembly and construction structure for large-span stiffness frame concrete arch bridges in order to solve the above-mentioned problems. It improves the problem that when the arch ring is vertically pulled, the connecting steel cables and hangers are subjected to large traction forces during the pouring of concrete for the arch ring, which can easily lead to displacement of the arch ring after assembly.

[0007] This utility model achieves the above-mentioned objective through the following technical solution: a precision assembly construction structure for a large-span stiffened concrete arch bridge, comprising: two bases, with several arch frame members on opposite sides of the two bases, and several steel cables on the top of the arch frame members; a hoisting mechanism located on the top of the bases; wherein the hoisting mechanism includes a support frame fixedly connected to the top of the bases, several rope-limiting frames on the surface of the support frame, pulleys rotatably connected to the inner wall of the rope-limiting frames, a fixed seat on one side of the bases, and fixed discs fixedly connected to both ends of the steel cables, with a ring of first screws threadedly connected to the top of the fixed discs, one side of the first screws threadedly connected to the inner wall of the fixed seat, and the other side of the first screws threadedly connected to the inner wall of the arch frame members. By using the first screw and the fixing plate, the two ends of the steel cable are respectively installed on the arch frame and the fixing seat. Through the support frame, the rope limiting frame and the pulley, the steel cable is supported, so that the arch frame and the fixing seat form a triangular fulcrum, which improves the hoisting load-bearing capacity of the arch frame, increases the stability of the arch frame after hoisting and splicing, and ensures that the spliced ​​arch frame will not shift during concrete pouring.

[0008] Preferably, a rope-pressing wheel is rotatably connected to the upper end of the inner wall of the rope-limiting frame, and both the pulley and the rope-pressing wheel are stainless steel components. The rope-pressing wheel and pulley limit the vertical movement range of the steel cable, preventing the steel cable from falling off the pulley surface and ensuring the stable hoisting of the arch frame by the steel cable.

[0009] Preferably, a mounting block is fixedly connected to the surface of the support frame, and a second screw is threadedly connected to the top of the rope-limiting frame. The surface of the second screw is threaded to the inner wall of the mounting block. The second screw secures the rope-limiting frame to the support frame, facilitating its later disassembly and storage.

[0010] Preferably, the end of the arch frame has four reserved holes, which are arranged in a rectangular pattern.

[0011] Preferably, the top of the base has mounting holes arranged in an even row.

[0012] Preferably, the top of the base is fixedly connected with two guide blocks.

[0013] The beneficial effects of this utility model are:

[0014] 1. By using the first screw, the fixing plate, the rope limiting frame and the pulley, the arch frame is lifted, so that the arch frame, the steel cable and the fixing seat form a triangular fulcrum, which improves the lifting load capacity of the arch frame. Compared with the existing method of vertically lifting the arch, which is prone to displacement of the assembled arch during the pouring, this method increases the stability of the arch frame after lifting and splicing by forming a triangular fulcrum with the arch frame, the steel cable and the fixing seat, and ensures that the spliced ​​arch frame will not shift during the pouring of concrete.

[0015] 2. By using the rope-pressing wheel and pulley, the vertical movement range of the steel cable is limited, preventing the steel cable from falling off the pulley surface and ensuring the stable hoisting of the arch frame by the steel cable. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0017] Figure 2 This is a schematic diagram of the hoisting mechanism structure of this utility model;

[0018] Figure 3 This is an exploded view of the rope-limiting frame and mounting block of this utility model;

[0019] Figure 4 for Figure 2 A magnified view of A in the middle.

[0020] In the diagram: 1. Base; 2. Arch frame; 3. Steel cable; 4. Lifting mechanism; 41. Fixed seat; 42. Fixed plate; 43. Support frame; 44. Rope limiting frame; 45. Pulley; 46. Rope pressing wheel; 47. Mounting block; 48. Second screw; 49. First screw; 410. Mounting hole; 411. Reserved hole; 412. Guide block. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] In practical implementation: such as Figure 1-4As shown, a precision assembly construction structure for a long-span stiffness frame concrete arch bridge includes: two bases 1, with several arch frame skeletons 2 on opposite sides of the two bases 1, and several steel cables 3 on the top of the arch frame skeletons 2; a hoisting mechanism 4, located on the top of the bases 1; wherein, the hoisting mechanism 4 includes a support frame 43 fixedly connected to the top of the bases 1, several rope-limiting frames 44 on the surface of the support frame 43, pulleys 45 rotatably connected to the inner wall of the rope-limiting frames 44, a fixed seat 41 on one side of the bases 1, fixed discs 42 fixedly connected to both ends of the steel cables 3, and ring-shaped first screws 49 threadedly connected to the top of the fixed discs 42, one side of the first screws 49 being threadedly connected to the inner wall of the fixed seat 41, and the other side of the first screws 49 being threadedly connected to the inner wall of the arch frame skeletons 2, an installation block 47 fixedly connected to the surface of the support frame 43, and a second screw 48 threadedly connected to the top of the rope-limiting frames 44, the surface of the second screw 48 being threadedly connected to the inner wall of the installation block 47.

[0023] Both the base 1 and the fixed seat 41 are made of concrete, and the support frame 43 is formed by welding steel pipes.

[0024] At the prefabrication site, base 1, fixed seat 41, and cooperative platform base are installed at the prefabrication sites on both sides of the construction site, as measured. Slope protection is carried out on both sides. Cable hangers are constructed on the cooperative platform bases, and support frames 43 are welded to base 1. The arch frame 2 is hoisted using the cable hangers, and the first section of the arch frame 2 is hoisted to the top of base 1. Anchor bolts are used to install the first section of the arch frame 2 on the top of base 1. An electric wrench or other tools are used to install the second screw 48 inside the rope-limiting frame 44 and the mounting block 47, ensuring the rope-limiting frame 44 is installed at the corresponding position on the support frame 43. An electric wrench or other tools are then used to further secure the installation. The tool installs multiple first screws 49 on one side of the fixing plate 42 and the arch frame 2, and on the other side of the fixing plate 42 and the fixing seat 41, so that the steel cable 3, the fixing seat 41 and the first arch frame 2 form a triangular fulcrum, thereby stabilizing the first arch frame 2. The other arch frame 2 are hoisted in the same way. The multiple arch frame 2 are installed with bolts, so that the multiple arch frame 2 are precisely assembled into an arch bridge shape. At this time, the template is installed on the assembled arch frame 2 and concrete is poured. After the pouring is completed, a series of processes such as vibration are carried out to form a concrete arch bridge.

[0025] like Figure 3 As shown, a rope-pressing wheel 46 is rotatably connected to the upper end of the inner wall of the rope-limiting frame 44. Both the pulley 45 and the rope-pressing wheel 46 are stainless steel components. The steel cable 3 passes between the pulley 45 and the rope-pressing wheel 46, and the pulley 45 and the rope-pressing wheel 46 guide and limit the steel cable 3.

[0026] like Figure 4As shown, the ends of the arch frame 2 have four pre-drilled holes 411 arranged in a rectangular pattern. The top of the base 1 has equally spaced mounting holes 410, and two guide blocks 412 are fixedly connected to the top of the base 1. By passing bolts through the pre-drilled holes 411 on the arch frame 2, and using an electric wrench to thread nuts onto the bolts, the multi-section arch frame 2 can be precisely assembled.

[0027] In use, this utility model utilizes a cable hanger to suspend the arch frame 2, hoisting the first section of the arch frame 2 to the top of the base 1, ensuring the lower end of the first section of the arch frame 2 contacts the guide block 412, aligning the pre-drilled hole 411 on the first section of the arch frame 2 with the mounting hole 410. At this point, the anchor rod is inserted into the pre-drilled hole 411 and the mounting hole 410 and installed, thus installing the first section of the arch frame 2 on the top of the base 1. Using an electric wrench or other tools, multiple first screws 49 are respectively installed at the junction of one side of the fixing plate 42 and the arch frame 2, and at the junction of the other side of the fixing plate 42 and the fixing seat 41, so that the steel cable... Rope 3 and fixing seat 41 are connected to the first arch frame 2 to form a triangular fulcrum, thereby stabilizing the first arch frame 2. The other arch frame 2 are hoisted in the same way, so that the ends of the multiple arch frame 2 are in contact and aligned with multiple reserved holes 411. At this time, bolts are passed through the corresponding reserved holes 411, and nuts are threaded onto the bolts using an electric wrench, so that the multiple arch frame 2 are precisely assembled into an arch bridge shape. Then, the template is installed on the assembled arch frame 2 and concrete is poured. After the pouring is completed, a series of processes such as vibration are carried out to form a concrete arch bridge.

[0028] It should be noted that the base 1, arch frame 2, steel cable 3, fixing seat 41, support frame 43, first screw 49 and second screw 48 mentioned above are all components with relatively mature existing technology. The specific models can be selected according to actual needs, and will not be elaborated here.

[0029] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider 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 precision assembly construction structure for a long-span stiffened frame concrete arch bridge, characterized in that, include: Two bases (1), and several arched frames (2) are provided on opposite sides of the two bases (1), and several steel cables (3) are provided on the top of the arched frames (2). The hoisting mechanism (4) is located on the top of the base (1); The hoisting mechanism (4) includes a support frame (43) fixedly connected to the top of the base (1). The surface of the support frame (43) is provided with several rope-limiting frames (44). The inner wall of the rope-limiting frame (44) is rotatably connected with a pulley (45). A fixed seat (41) is provided on one side of the base (1). Both ends of the steel cable (3) are fixedly connected with a fixed disc (42). The top of the fixed disc (42) is threaded with a ring-shaped first screw (49). The surface of the first screw (49) on one side is threaded to the inner wall of the fixed seat (41), and the surface of the first screw (49) on the other side is threaded to the inner wall of the arch frame (2).

2. The precision assembly construction structure for a large-span stiffened frame concrete arch bridge according to claim 1, characterized in that: The inner wall of the rope limiting frame (44) is rotatably connected to a rope pressing wheel (46), and both the pulley (45) and the rope pressing wheel (46) are stainless steel components.

3. The precision assembly construction structure for a large-span stiffened frame concrete arch bridge according to claim 1, characterized in that: The support frame (43) is fixedly connected to the surface of the mounting block (47), and the top of the rope-limiting frame (44) is threadedly connected to the second screw (48), the surface of the second screw (48) being threadedly connected to the inner wall of the mounting block (47).

4. The precision assembly construction structure for a large-span stiffened frame concrete arch bridge according to claim 1, characterized in that: The end of the arch frame (2) is provided with four reserved holes (411), which are arranged in a rectangular shape.

5. The precision assembly construction structure for a large-span stiffened frame concrete arch bridge according to claim 1, characterized in that: The top of the base (1) has mounting holes (410) arranged in equal rows.

6. The precision assembly construction structure for a large-span stiffened frame concrete arch bridge according to claim 1, characterized in that: Two guide blocks (412) are fixedly connected to the top of the base (1).

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