Main arch closure device and arch bridge main arch
By designing the main arch closure device and utilizing state switching and locking mechanisms, the problem of inaccurate positioning caused by temperature changes during the closure process was solved, achieving precise closure and structural stability of the arch bridge, and improving the safety and durability of the arch bridge.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- CHINA RAILWAY 19TH BUREAU GRP EAST CHINA ENG CO LTD
- Filing Date
- 2025-04-15
- Publication Date
- 2026-05-08
AI Technical Summary
During the closure process, factors such as temperature and wind force affect the positioning accuracy of the existing main arch closure device, resulting in inaccurate closure of the arch ribs and affecting the safety and stability of the arch bridge.
Design a main arch closure device, including a first connecting component, a second connecting component, and a locking component. By switching between unlocked, semi-locked, and fully locked states, it adapts to temperature changes and ensures that the arch ribs close precisely at the design temperature. A hydraulic or mechanical locking mechanism is used to maintain constant pressure.
It achieves precise closure of the arch ribs during the closure process, ensuring the stability and safety of the arch bridge structure, adapting to expansion and contraction due to temperature changes, and improving the accuracy of closure and the durability of the structure.
Smart Images
Figure CN224213109U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of bridge engineering technology, and in particular to a main arch closure device and the main arch of an arch bridge. Background Technology
[0002] The main arch of an arch bridge is the primary load-bearing component of the arch bridge structure. The design and construction of the arch ribs are crucial to the safety and stability of the entire arch bridge.
[0003] "Arch rib closure" refers to the process of joining the final section of the arch rib during the construction of an arch bridge, forming a complete arch structure. This process marks the completion of the main structure of the arch bridge and is a crucial engineering milestone. Closure typically occurs at the highest point of the arch bridge, at which point the main arch ring has closed, forming a continuous structural system. The locking time for arch rib closure must be instantaneous under design temperature conditions to ensure that the stress of the main arch after closure meets the design stress. Therefore, a closure device is needed for temporary locking during the closure process.
[0004] During the actual closure process, the main arches on both sides of the closure opening undergo continuous axial expansion and contraction due to external temperature fluctuations. Therefore, it is necessary to design a main arch closure device that can temporarily lock the main arch while also adapting to the continuous changes in the width of the closure opening. Utility Model Content
[0005] This utility model provides a main arch closure device to solve the defect of the existing main arch closure device in which temperature, wind and other factors affect its positioning accuracy during the closure process, and realize a main arch closure device with more accurate positioning.
[0006] This utility model provides a main arch closure device comprising a first connecting component, a second connecting component, and a locking component. The first connecting component is disposed on one side of the closure opening of the arch rib segment; the second connecting component is disposed on the other side of the closure opening of the arch rib segment; and the locking component is disposed between the first connecting component and the second connecting component. The locking component is used to switch between an unlocked state, a semi-locked state, and a fully locked state. In the semi-locked state, one of the first connecting component and the second connecting component is locked to the locking component; in the fully locked state, both the first connecting component and the second connecting component are locked to the locking component.
[0007] According to the present invention, a main arch closure device is provided, wherein the first connecting component and the second connecting component are symmetrically arranged, and each includes a horizontal connecting pipe, a positioning component and a connecting component. The horizontal connecting pipe is located at the arch rib segment; one end of the positioning component is connected to the horizontal connecting pipe; the connecting component is located at the other end of the positioning component; and the locking component is located between the two connecting components.
[0008] According to the present invention, a main arch closure device is provided, wherein a plurality of first stiffening ribs are provided between the positioning member and the connecting member.
[0009] According to the present invention, a main arch closure device is provided, wherein a plurality of second stiffening ribs are provided between the horizontal connecting pipe and the arch rib segment.
[0010] According to the present invention, a main arch closure device is provided, wherein multiple locking components are provided, and the multiple locking components are arranged at intervals.
[0011] According to the present invention, a main arch closure device is provided, wherein the locking assembly includes a bolt rod, a first nut, a second nut, and a third nut; the bolt rod passes through the connectors on the first connecting assembly and the second connecting assembly; the first nut cooperates with the nut on the bolt rod to lock one of the connectors to the bolt rod; the second nut and the third nut cooperate to lock the other of the connectors to the bolt rod.
[0012] According to the present invention, a main arch closure device is provided, wherein the interior of the horizontal connecting pipe is provided with a stiffening ring.
[0013] According to the main arch closure device provided by this utility model, the horizontal connecting pipe is provided with grouting holes and venting holes, and the grouting holes and venting holes are arranged at intervals.
[0014] This utility model also provides a main arch of an arch bridge, including multiple arch rib segments and the main arch closure device described in any of the above embodiments, wherein the main arch closure device is disposed between the arch rib segments on both sides of the closure opening.
[0015] The main arch closure device provided by this utility model has a locking component in an unlocked state when the arch rib is close to closure, allowing the two ends of the arch rib to freely expand and contract with temperature changes. As the temperature gradually approaches the design temperature, the locking component enters a semi-locked state, connecting with one side of the connecting component and restricting displacement on that side. At this time, the other side can still move with temperature changes. Once the temperature reaches the design temperature condition, the locking component can be quickly switched to a fully locked state, simultaneously connecting with the first and second connecting components to achieve the final closure of the arch rib. At this time, the locking component maintains constant pressure through its internal locking mechanism, ensuring the stability of the arch rib in the closure position. Through the joint cooperation of the first connecting component, the second connecting component, and the locking component, this utility model can ensure that the arch rib can adapt to the expansion and contraction caused by temperature changes during the closure process and achieve precise closure under the design temperature conditions.
[0016] The main arch of the arch bridge provided by this utility model, since it includes the above-mentioned main arch closure device, also has the beneficial effects of the above-mentioned main arch closure device. Attached Figure Description
[0017] To more clearly illustrate the technical solutions in this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.
[0018] Figure 1 This is a structural schematic diagram of the main arch closure device provided by this utility model.
[0019] Figure 2 This is a structural schematic diagram of the positioning component of the main arch closure device provided by this utility model.
[0020] Figure 3 This is a structural schematic diagram of the connecting component of the main arch closure device provided by this utility model.
[0021] Figure 4 This is a schematic diagram of the horizontal connecting pipe of the main arch closure device provided by this utility model.
[0022] Figure 5 This is a schematic diagram of the main arch closure device provided by this utility model in the installation structure of the main arch of an arch bridge.
[0023] Figure 6 yes Figure 5 A schematic diagram of the AA direction structure.
[0024] Figure 7 yes Figure 5 A cross-sectional view along the BB direction.
[0025] Reference numerals: 100: Main arch closure device; 110: Positioning component; 111: Notch; 120: Connector; 121: Connecting hole; 130: First stiffening rib; 140: Locking assembly; 141: Bolt rod; 142: First nut; 143: Second nut; 144: Third nut; 150: Horizontal connecting pipe; 151: Stiffening ring; 152: Concrete; 153: Grouting hole; 154: Vent hole; 160: Second stiffening rib; 210: Upper chord steel pipe; 220: Lower chord steel pipe. Detailed Implementation
[0026] The embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and should not be construed as limiting the scope of this utility model.
[0027] In the description of the embodiments of this utility model, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this utility model and 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 embodiments of this utility model. In addition, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.
[0028] In the description of the embodiments of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this utility model based on the specific circumstances.
[0029] In this embodiment of the utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.
[0030] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.
[0031] Before understanding the use and working principle of this utility model, the arch rib segment and closure are described, that is, the application environment of this utility model is described. It should be noted that the description of the application environment of this utility model is not a limitation, but rather one of many application environments. The arch rib segment generally includes two upper chord steel pipes 210 and two lower chord steel pipes 220, and their specific arrangement can be found in [reference needed]. Figure 7 Each upper chord steel pipe 210 and lower chord steel pipe 220 is provided with a closure joint, wherein the closure joints of the two upper chord steel pipes 210 are located on the same straight line, and the closure joints of the two lower chord steel pipes 220 are located on the same straight line. Therefore, during closure, a main arch closure device 100 can be used between the two upper chord steel pipes 210 for closure. Another main arch closure device 100 is used between the two lower chord steel pipes 220 for closure. In specific installation, the first connecting component and the second connecting component are first installed between the two upper chord steel pipes 210 or between the two lower chord steel pipes 220 by bolts or welding, and then the first connecting component and the second connecting component are connected by locking component 140. For ease of description, the following embodiments are all described with connection to two upper chord steel pipes 210. The following description is combined with Figures 1-7 The main arch closure device 100 of this utility model is described.
[0032] Figure 1 A schematic diagram of the main arch closure device 100 provided in an embodiment of the present invention is shown. Figure 5 This example illustrates a schematic diagram of the main arch closure device 100 provided in an embodiment of the present invention installed on the main arch of an arch bridge. Figure 6 Example Figure 5 A schematic diagram of the AA direction structure. Figure 7 Example Figure 5 A cross-sectional view along the BB direction.
[0033] Reference Figure 1 , Figure 5 , Figure 6 and Figure 7 The present invention provides a main arch closure device 100 including a first connecting component, a second connecting component, and a locking component 140. The first connecting component is disposed on one side of the closure opening of the arch rib segment; the second connecting component is disposed on the other side of the closure opening of the arch rib segment; the locking component 140 is disposed between the first connecting component and the second connecting component; wherein, the locking component 140 is used to switch between an unlocked state, a half-locked state, and a fully locked state; in the half-locked state, one of the first connecting component and the second connecting component is locked with the locking component 140; in the fully locked state, both the first connecting component and the second connecting component are locked with the locking component 140.
[0034] In the above structure, the first connecting component is located on one side of the arch rib closure joint and is used to connect with the locking component 140. The second connecting component is located on the other side of the arch rib closure joint and is symmetrical to the first connecting component. The locking component 140 has multiple state transition functions to adapt to different construction needs. In the unlocked state, the locking component 140 is not in contact with the first or second connecting component, allowing the arch rib to expand and contract freely with temperature changes. In the semi-locked state, the locking component 140 is connected to the first (or one of the second) connecting components, restricting movement on one side of the arch rib, but the other side can still move freely. In the fully locked state, the locking component 140 is connected to both the first and second connecting components simultaneously, completely restricting movement on both sides of the arch rib and achieving complete closure of the arch rib.
[0035] As the arch rib approaches closure, the locking component 140 is in the unlocked state, allowing the two ends of the arch rib to freely expand and contract with temperature changes. As the temperature gradually approaches the design temperature, the locking component 140 enters a semi-locked state, connecting with one side of the connecting component (let's say the first connecting component), restricting displacement on that side. At this time, the other side (the second connecting component) can still move with temperature changes. Once the temperature reaches the design temperature, the locking component 140 can be quickly switched to the fully locked state, simultaneously connecting with the first and second connecting components to achieve the final closure of the arch rib. At this time, the locking component 140 maintains constant pressure through its internal locking mechanism, ensuring the stability of the arch rib in the closure position. This invention, through the joint cooperation of the first connecting component, the second connecting component, and the locking component 140, ensures that the arch rib can adapt to the expansion and contraction caused by temperature changes during the closure process and achieve precise closure under the design temperature conditions.
[0036] In some possible embodiments, the locking assembly 140 includes a hydraulic or mechanical locking mechanism for applying or releasing locking force in different states. For example, in the fully locked state, the hydraulic cylinder can provide sufficient pressure to secure the two connecting assemblies, while when unlocking is required, the hydraulic cylinder releases pressure, allowing the connecting assemblies to separate. This design ensures the flexibility and ultimate stability of the arch rib during the closure process, while precisely controlling the closure timing and locking force to ensure that the stress state of the arch bridge meets design requirements. In this way, the main arch closure device 100 effectively addresses the challenges posed by temperature variations, ensuring the safety and durability of the arch bridge structure.
[0037] Figure 2 A schematic diagram of the positioning component 110 of the main arch closure device 100 provided in this embodiment of the present invention is shown.
[0038] Reference Figure 1 and Figure 2In some embodiments of this utility model, the first connecting component and the second connecting component are symmetrically arranged, and both the first connecting component and the second connecting component include a horizontal connecting pipe 150, a positioning member 110 and a connecting member 120. The horizontal connecting pipe 150 is located on the arch rib segment; one end of the positioning member 110 is connected to the horizontal connecting pipe 150; the connecting member 120 is located at the other end of the positioning member 110, and the locking component 140 is located between the two connecting members 120.
[0039] Specifically, the two ends of the horizontal connecting pipe 150 are connected to two upper chord steel pipes 210 respectively, and the connection method can be welding or bolting. The horizontal connecting pipe 150 and the two upper chord steel pipes 210 form an "I"-shaped structure, with the closure point located between the two "I"-shaped structures. One end of the positioning component 110 has a notch 111, which is adapted to the shape of the horizontal connecting pipe 150, thereby making the connection between the two tighter and stronger. When the horizontal connecting pipe 150 is cylindrical, the notch 111 is an arc-shaped structure. When the horizontal connecting pipe 150 is a cuboid structure, the notch 111 is rectangular. The positioning component 110 can be a plate-like structure and is set perpendicular to the length direction of the horizontal connecting pipe 150, that is, the positioning component 110 is parallel to the cross-section of the horizontal connecting pipe 150. The width of the end of the positioning component 110 connected to the horizontal connecting pipe 150 is greater than the width of the other end, that is, the end of the positioning component 110 away from the horizontal connecting pipe 150 has a chamfer. The connector 120 is also a plate-like structure, specifically a rectangular plate-like structure. The connector 120 is positioned perpendicular to the positioning member 110, and the positioning member 110 is connected to the middle of the connector 120. This configuration allows for multiple locking components 140 to be provided on both sides of the connector 120, spaced apart, resulting in a more balanced connection and more balanced force distribution. Specifically, four locking components 140 are provided on each side, and these four locking components 140 are positioned along the length of the connector 120.
[0040] Reference Figure 1 In some embodiments of this utility model, a plurality of first stiffening ribs 130 are provided between the positioning member 110 and the connecting member 120. The first stiffening ribs 130 are disposed at the connection between the positioning member 110 and the connecting member 120, that is, one side of the first stiffening rib 130 is connected to the positioning member 110 and the other side is connected to the connecting member 120. The first stiffening ribs 130 can be disposed between the positioning member 110 and the connecting member 120 by welding.
[0041] The primary function of the first stiffening rib 130 is to enhance the connection strength between the connector 120 and the positioning member 110. By setting the first stiffening rib 130 between them, the rigidity and stability of the overall structure can be significantly improved, preventing deformation or fracture under stress. Secondly, the arch rib will be subjected to various external forces during the closure process, including wind load and self-weight. The first stiffening rib 130 can improve the bending resistance of the connector 120, ensuring that the structure will not undergo excessive bending deformation under dynamic loads. Furthermore, the first stiffening rib 130 can effectively disperse stress concentration. In the case of a direct connection between the connector 120 and the positioning member 110, excessive local stress may lead to material fatigue or damage. The presence of the first stiffening rib 130 can evenly distribute stress and extend service life.
[0042] The first stiffening rib 130 can specifically include the following options: ① Straight plate stiffening rib: rectangular or flat. Straight plate stiffening ribs have the advantages of simple processing and low cost, and can provide sufficient support area to distribute stress. ② Inclined stiffening rib: an inclined plate at a certain angle, which can be adjusted according to actual needs. Inclined stiffening ribs enhance structural performance through the inclination angle. This design can better adapt to different stress directions and improve the overall structural stability. ③ L-shaped stiffening rib; ④ T-shaped stiffening rib: composed of a vertical plate and a horizontal plate. The vertical part can enhance vertical stability, while the horizontal part provides lateral support, which can improve the bending resistance of the connection area.
[0043] Reference Figure 1 In some embodiments of this utility model, a plurality of second stiffening ribs 160 are provided between the flat connecting pipe 150 and the arch rib segment. The specific arrangement of the second stiffening ribs 160 can be referred to the first stiffening rib 130, and will not be repeated here.
[0044] Figure 3 A schematic diagram of the connecting member 120 of the main arch closure device 100 provided in this embodiment of the present invention is shown.
[0045] Reference Figure 1 and Figure 3 In some embodiments of this utility model, the locking assembly 140 includes a bolt rod 141, a first nut 142, a second nut 143, and a third nut 144; the bolt rod 141 passes through the connector 120 on the first connecting assembly and the second connecting assembly; the first nut 142 cooperates with the nut on the bolt rod 141 to lock one of the connectors 120 to the bolt rod 141; the second nut 143 and the third nut 144 cooperate to lock the other of the connectors 120 to the bolt rod 141.
[0046] Specifically, the connector 120 is provided with connecting holes 121 corresponding to the number of bolt rods 141. During installation, firstly, the bolt rod 141 is passed through the connecting hole 121 of one of the connectors 120. Then, the first nut 142 and the second nut 143 are threaded onto the bolt rod 141. Next, the bolt rod 141 is passed through the connecting hole 121 of another connector 120. Finally, the third nut 144 is threaded onto the bolt rod 141. When the first nut 142, the second nut 143, and the third nut 144 are all in a relaxed state, the locking assembly 140 is in an unlocked state. When the first nut 142 is tightened and the nut is tightened to lock one of the connectors 120, the locking assembly 140 is in a semi-locked state. When the tightening of the first nut 142 and the tightening of the nut interact, and the interaction of the second nut 143 and the third nut 144 locks the other connector 120, the locking assembly 140 is in a fully locked state.
[0047] Reference Figure 1 In some embodiments of this utility model, a stiffening ring 151 is provided inside the flat connecting pipe 150. By providing a stiffening ring 151 inside the flat connecting pipe 150, the rigidity of the flat connecting pipe 150 can be increased, preventing deformation of the connection between the flat connecting pipe 150 and the positioning member 110 due to stress.
[0048] Figure 4 This is a structural schematic diagram of the horizontal connecting pipe 150 of the main arch closure device 100 provided by this utility model. (Refer to...) Figure 1 and Figure 4 In some embodiments of this utility model, the horizontal connecting pipe 150 is provided with a grouting hole 153 and a venting hole 154, which are spaced apart. In practical use, concrete 152 is poured into the horizontal connecting pipe 150 through the grouting hole 153 to increase its rigidity. During the pouring process, gas can be discharged through the venting hole 154, thereby making the internal concrete 152 more compacted.
[0049] This utility model also provides a main arch of an arch bridge, including multiple arch rib segments and a main arch closure device 100 as described in any of the above embodiments, wherein the main arch closure device is disposed between the arch rib segments on both sides of the closure opening.
[0050] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.
Claims
1. A main arch closure device, characterized in that, include: The first connecting component is a flat connecting pipe (150) located on the arch rib segment on one side of the closure joint. The second connecting component is the flat connecting pipe (150) located on the arch rib segment on the other side of the closure joint. A locking component (140) is disposed between the first connecting component and the second connecting component; The locking component (140) is used to switch between an unlocked state, a half-locked state and a fully locked state; in the half-locked state, one of the first connecting component and the second connecting component is locked with the locking component (140); in the fully locked state, both the first connecting component and the second connecting component are locked with the locking component (140).
2. The main arch closure device according to claim 1, characterized in that, The first connecting component and the second connecting component are symmetrically arranged, and each includes: The positioning component (110) is connected at one end to the flat connecting pipe (150); A connector (120) is located at the other end of the positioning member (110), and a locking component (140) is located between the two connectors (120).
3. The main arch closure device according to claim 2, characterized in that, A plurality of first stiffening ribs (130) are provided between the positioning member (110) and the connecting member (120).
4. The main arch closure device according to claim 2 or 3, characterized in that, Multiple second stiffening ribs (160) are provided between the flat connecting pipe (150) and the arch rib segment.
5. The main arch closure device according to claim 2, characterized in that, The locking components (140) are provided in multiples, and the multiple locking components (140) are arranged at intervals.
6. The main arch closure device according to claim 5, characterized in that, The locking assembly (140) includes a bolt rod (141), a first nut (142), a second nut (143), and a third nut (144). The bolt rod (141) passes through the connector (120) on the first connecting assembly and the second connecting assembly. The first nut (142) cooperates with the nut on the bolt rod (141) to lock one of the connectors (120) to the bolt rod (141). The second nut (143) and the third nut (144) cooperate to lock the other of the connectors (120) to the bolt rod (141).
7. The main arch closure device according to any one of claims 2, 3, 5 and 6, characterized in that, The inside of the flat connecting pipe (150) is provided with a stiffening ring (151).
8. The main arch closure device according to claim 7, characterized in that, The flat connecting pipe (150) is provided with a grouting hole (153) and an exhaust hole (154), and the grouting hole (153) and the exhaust hole (154) are arranged at intervals.
9. A main arch of an arch bridge, characterized in that, It includes the plurality of arch rib segments and the main arch closure device (100) as described in any one of claims 1-8, wherein the main arch closure device (100) is disposed between the arch rib segments on both sides of the closure opening.