Self-anchored arch rib support

Abstract

The utility model provides a self-anchored arch rib support which comprises a plurality of wind load self-anchored systems, each wind load self-anchored system comprises an anchoring structure and an expanded foundation, the middle portion and the lower portion of each anchoring structure extend into a ground foundation, and the upper portion of each anchoring structure is fixed together with the expanded foundation; the arch rib support body is fixed on the enlarged foundation in a matched mode; the thrust self-anchoring system is arranged between the arch rib support body and the wind load self-anchoring system adjacent to the arch rib support body and comprises a cable rope and a cable rope adjusting device, one end of the cable rope is connected with one side of the upper portion of the arch rib support body, and the other end of the cable rope is connected with the wind load self-anchoring system adjacent to the arch rib support body. And the other end of the cable rope is detachably connected with the expanded foundation through the cable rope adjusting device. The utility model can resist the horizontal force generated by the installation of the arch rib sections, and solves the problem that the transverse wind cable can not be arranged to resist the wind load due to the narrow field.

Description

Technical Field

[0001] This utility model relates to the field of bridge construction technology, and in particular to a self-anchored arch rib support. Background Technology

[0002] Steel-concrete composite arch bridges have seen rapid development in my country due to their advantages such as beautiful design, high load-bearing capacity, and simple construction. In land-based construction, steel-concrete composite arch bridges often employ the scaffolding method. This involves erecting temporary arch rib supports below the designed arch ring location, using these supports as a construction platform for the construction of the arch ribs and related superstructure. Arch rib construction typically includes: prefabricating the individual steel components of the arch rib in a factory, transporting them to the construction site, welding them into multiple arch rib segments, hoisting them onto the arch rib supports, and then aligning and welding them. During construction, because the arch ribs are catenary-shaped, the segmented installation exerts a certain horizontal force on the arch rib supports. To reduce the impact of horizontal forces on the alignment of the arch ribs, a common method is to connect the arch rib supports with steel pipes or structural steel sections along the longitudinal direction of the bridge to form a whole. However, this results in material waste. Furthermore, if the arch rib installation segments are too long, instability may occur due to the slenderness ratio of the connections between the supports not meeting the requirements. In addition, considering that arch rib supports are generally tall and narrow structures, the lateral wind load has a significant impact. Another method is to use lateral wind cables to resist the load. However, if the space on both sides of the arch bridge is narrow, it is not possible to set up wind cables to resist the wind load. Utility Model Content

[0003] To address the aforementioned problems identified in the background art, this utility model provides a self-anchored arch rib support.

[0004] To achieve the above objectives, the technical solution of this utility model is as follows:

[0005] A self-anchored arch rib support, comprising:

[0006] The wind load self-anchoring system is provided in multiple parts, including anchoring structures and enlarged foundations. The middle and lower parts of the anchoring structures extend into the ground foundation, and the upper part is fixed together with the enlarged foundation.

[0007] The arch rib support body is matched and fixed on the enlarged foundation;

[0008] The thrust self-anchoring system includes at least one set disposed between the arch rib support body and the wind load self-anchoring system adjacent to the arch rib support body, including a guy rope and a guy rope adjustment device. One end of the guy rope is connected to the upper side of the arch rib support body, and the other end is detachably connected to the enlarged foundation through the guy rope adjustment device.

[0009] Preferably, the anchoring structure includes multiple pull-out anchors, the lower and middle parts of which extend into the ground foundation, and the upper parts which pass through the enlarged foundation and are fixed together.

[0010] Preferably, the pull-out anchor is further provided with an anchor plate and a nut, the anchor plate being able to pass through the top end of the pull-out anchor, and the nut being able to be screwed into the pull-out anchor and abut against the anchor plate, so that the anchor plate abuts against the top surface of the enlarged foundation;

[0011] Reinforcing bars are pre-embedded in the enlarged foundation near its top surface and close to the pull-out anchor.

[0012] Preferably, each thrust self-anchoring system further includes a support column ear plate and a foundation ear plate. The support column ear plate is fixed to one side of the upper part of the arch rib support body, and the foundation ear plate is fixed to one side of the top surface of the enlarged foundation. One end of the guy rope is detachably connected to the arch rib support body through the support column ear plate, and the other end is connected to the movable end of the guy rope adjustment device. The fixed end of the guy rope adjustment device is detachably connected to the enlarged foundation through the foundation ear plate.

[0013] Preferably, one end of the guy rope is connected to a shackle, which is detachably connected to the bracket column ear plate.

[0014] Preferably, a thrust self-anchoring system is provided on one side of the arch rib support body that is not fixed to the arch rib arch seat and whose corresponding arch rib segment is not connected by a guy rope.

[0015] Preferably, each of the arch rib support bodies includes four support columns forming a cube, and each set of thrust self-anchoring systems includes two guy ropes. One end of each of the two guy ropes is connected to one of the two support columns at the front / rear of the arch rib support body, and the other end is connected to the intersection line of the extension line of the connecting line between the bottom ends of the two support columns on the same left or right side and the adjacent enlarged foundation, or connected to the outside of the intersection line of the extension line of the connecting line between the bottom ends of the two support columns on the same left or right side and the adjacent enlarged foundation.

[0016] Preferably, the guy rope adjusting device is a hand-operated hoist.

[0017] Preferably, the enlarged foundation is a reinforced concrete foundation.

[0018] Preferably, the top of the arch rib support body is further provided with an adjustable support system, which includes a support beam, a top support pad and a jack. The support beam is arranged along the transverse direction of the bridge and fixed on the top of the arch rib support body. The top support pad and the jack are fixed on the top surface. The top support pad includes two top support pad units for matching the bottom sides of the corresponding support arch rib chord. The jack is arranged between the two top support pad units.

[0019] The self-anchored arch rib support described above has the following advantages:

[0020] (1) This utility model sets the anchoring point of the guy rope in the thrust self-anchoring system on the extended foundation of the adjacent thrust self-anchoring system, which effectively solves the problem that it is impossible to set up a transverse guy rope to resist wind load in narrow spaces.

[0021] (2) By setting a thrust self-anchoring system between the arch rib support body and the wind load self-anchoring system adjacent to the arch rib support body, the horizontal force generated during the installation of the arch rib segment can be resisted, thereby avoiding the installation of longitudinal connections between the arch rib supports and avoiding material waste.

[0022] (3) The present invention further provides an adjustable support system at the top of the arch rib support, which can facilitate the rapid adjustment of the elevation when the arch rib segments are aligned. Attached Figure Description

[0023] Figure 1 This is a structural schematic diagram of an embodiment of the present invention.

[0024] Figure 2 yes Figure 1 A top-view structural diagram.

[0025] Figure 3 This is a structural schematic diagram of an embodiment of a wind-loaded self-anchoring system.

[0026] Figure 4 yes Figure 3 A schematic diagram of the right-side structure.

[0027] Figure 5 yes Figure 4 A top-view structural diagram.

[0028] Figure 6 This is a structural schematic diagram of an embodiment of a thrust self-anchoring system.

[0029] Figure 7 This is a schematic diagram of the adjustable support system.

[0030] Figure 8 yes Figure 7 A schematic diagram of the right-side structure.

[0031] Figure 9 yes Figure 7 A top-view structural diagram.

[0032] In the diagram, the wind load self-anchoring system is 100, the enlarged foundation is 110, the pull-out anchor is 120, the arch rib support body is 200, the support column is 210, the thrust self-anchoring system is 300, the support column ear plate is 310, the shackle is 320, the guy rope is 330, the hand chain hoist is 340, the foundation ear plate is 350, the adjustable support system is 400, the jack is 410, the support beam is 420, and the top support is 430. Detailed Implementation

[0033] 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. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0034] In the description of this utility model, it should be noted that the terms "upper", "lower", "left", "right", "front", "rear", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship that the utility model product is usually placed in during use. They are only for the convenience of describing 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 this utility model.

[0035] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0036] A self-anchored arch rib support, combined with Figure 1-2As shown, the system includes a wind load self-anchoring system 100, an arch rib support body 200, and a thrust self-anchoring system 300. The wind load self-anchoring system 100 comprises multiple components, including an anchoring structure and an enlarged foundation 110. The middle and lower parts of the anchoring structure extend into the ground foundation, while the upper part is fixed to the enlarged foundation 110. The anchoring structure is firmly bonded to the ground foundation, thus ensuring the stability of the enlarged foundation 110. The arch rib support body 200 is fixedly mounted on top of the enlarged foundation 110. The thrust self-anchoring system 300... 00, which includes at least one set, disposed between the arch rib support body 200 and the wind load self-anchoring system 100 adjacent to the arch rib support body 200, including a guy rope 330 and a guy rope adjustment device. One end of the guy rope 330 is connected to the upper side of the arch rib support body 200, and the other end is detachably connected to the enlarged foundation 110 through the guy rope adjustment device. The guy rope adjustment device can adjust the overall length of the guy rope 330 and the guy rope adjustment device, thereby better resisting wind load and the horizontal force of the installed arch rib segment. In this embodiment, the enlarged foundation 110 serves as the anchoring foundation for both the arch rib support body 200 and the guy rope 330, eliminating the need for an anchoring foundation for the lateral guy rope. This effectively solves the problem of not being able to set up a lateral guy rope anchoring foundation to resist wind loads in narrow spaces. Furthermore, by setting up a thrust self-anchoring system 300 between the arch rib support body 200 and the wind load self-anchoring system 100 adjacent to the arch rib support body 200, the horizontal force generated during the installation of the arch rib segments can be resisted, thereby avoiding the installation of longitudinal connections between the arch rib supports and preventing material waste.

[0037] Preferably, this embodiment provides a specific anchoring structure, combined with Figure 3-5As shown in the illustration, the wind load self-anchoring system 100 of this embodiment is installed on land. Considering the construction period and cost, the anchoring structure includes multiple pull-out anchors 120. The lower and middle parts of the pull-out anchors 120 extend into the ground foundation, and the upper parts pass through the enlarged foundation 110 and are fixed together. The construction of the pull-out anchors 120 can be as follows: first, drill holes downward in the ground foundation, then vertically insert the pull-out anchors 120, and grout is injected from bottom to top through grouting pipes. After reaching a certain strength, the enlarged foundation 110 is poured. After the concrete of the enlarged foundation 110 has solidified, the enlarged foundation 110 can be stably connected to the pull-out anchors 120. More preferably, the pull-out anchor 120 is also equipped with an anchor plate and a nut. The anchor plate can be fitted through the top of the pull-out anchor, and the nut can be fitted into the pull-out anchor and abut against the anchor plate, so that the anchor plate abuts against the top surface of the enlarged foundation 110. Reinforcing steel bars are pre-embedded in the enlarged foundation 110 near its top surface and close to the pull-out anchor 120. Based on the above-mentioned more preferred scheme, the construction method also includes the above steps: after the enlarged foundation 110 is consolidated, the anchor plate is inserted from the top of the pull-out anchor 120 and the nut is screwed in until the nut abuts against the top surface of the anchor plate. The reinforcing steel bars pre-embedded in the enlarged foundation 110 near its top surface and close to the pull-out anchor are located below the anchor plate, which can improve the compressive strength of the enlarged foundation 110. Depending on the actual situation, the above-mentioned preferred scheme can also adopt other construction methods, such as: drilling holes downwards in the ground foundation, reserving anchor bolt channels in the formwork of the enlarged foundation 110 (the anchor bolt channels can be reserved by inserting PVC pipes into the formwork), then pouring the enlarged foundation 110, pre-embedding reinforcing steel bars in the enlarged foundation 110 near its top surface and close to the anchor bolt channels, and after the enlarged foundation 110 has consolidated to a certain strength, inserting the pull-out anchor bolt 120 through the anchor bolt channels and into the hole in the ground foundation, grouting from bottom to top through the grouting pipe, the grout overflowing from the top of the enlarged foundation 110, and the grout consolidating to solidify the pull-out anchor bolt 120 with the ground foundation and the enlarged foundation 110, then inserting the anchor plate from the top of the pull-out anchor bolt 120, and finally screwing in the nut to hold the top surface of the anchor plate against the top surface of the enlarged foundation 110. Alternatively, depending on the actual situation, various pile structures, such as bored cast-in-place piles, can also be used for the anchoring structure.

[0038] Preferably, at least six pull-out anchor bolts 120 are provided to better maintain the stability of the anchorage. Combined with... Figure 5 As shown, this embodiment is equipped with 8 pull-out anchor rods 120.

[0039] Preferably, combined with Figure 6As shown, each thrust self-anchoring system 300 also includes a support column ear plate 310 and a foundation ear plate 350. The support column ear plate 310 is fixed to one side of the upper part of the arch rib support body 200, and the foundation ear plate 350 is fixed to one side of the top surface of the enlarged foundation 110. One end of the guy rope 330 is detachably connected to the arch rib support body 200 through the support column ear plate 310, and the other end is connected to the movable end of the guy rope adjustment device. The fixed end of the guy rope adjustment device is detachably connected to the enlarged foundation 110 through the foundation ear plate 350. This embodiment uses an ear plate structure for connection. The ear plate is provided with corresponding ear holes, which can facilitate the binding of the guy rope 330 and the connection with the corresponding guy rope adjustment device through pins or hooks, etc., making operation convenient and improving construction efficiency.

[0040] Preferably, one end of the guy rope 330 is connected to a shackle 320, which is detachably connected to the support column ear plate 310. Before installing the guy rope 330, the shackle 320 is pre-connected to one end of the guy rope 330. Then, when installing the thrust self-anchoring system 300, the shackle 320 can be directly hung on the support column ear plate 310 to quickly connect the guy rope 330 to the arch rib support body 200.

[0041] Preferably, this embodiment also provides a guy rope adjustment device, which is a hand chain hoist 340. The length of the chain or wire rope of the hand chain hoist 340 can be adjusted to achieve overall length adjustment of the guy rope 330 and the guy rope adjustment device.

[0042] Preferably, to reduce construction costs while ensuring construction safety and accuracy, this embodiment fully considers the number of thrust self-anchoring systems 300. Specifically, a thrust self-anchoring system 300 is provided on one side of the arch rib support body 200 that is not fixed to the arch rib arch seat and whose corresponding arch rib segment is connected without a guy rope 330. Combined with... Figure 1 The above settings will be explained. Figure 1 The arch rib support shown in the diagram is used to install one side of the arch rib segment. The opposite arch rib segment can be installed using the support method, the rotation method, or other methods. In the installation of one side of the arch rib segment, the rear enlarged foundation 110 is installed on the arch rib seat (the rightmost enlarged foundation 110 shown in the figure). Since the arch seat and arch rib are relatively stable, the arch rib support body 200 installed on the arch rib seat is not connected to its top side by a guy rope 330. The arch rib segment supported by the front enlarged foundation 110 (the leftmost enlarged foundation 110 shown in the figure) is the arch rib segment on the other side. This other arch rib segment is tensioned by a guy rope, so the arch rib support body 200 is not connected to its top side by a guy rope 330.

[0043] Preferably, each arch rib support body 200 includes four support columns 210 forming a cube. These four support columns 210 are connected by transverse connections; this is the existing structure of the arch rib support body 200 and will not be described in detail here. Each thrust self-anchoring system 300 includes two guy ropes 330, combined with... Figure 2 As shown, one end of each of the two guy ropes 330 is connected to one of the two support columns 210 at the front and rear of the arch rib support body 200, respectively. Figure 2 (As shown in the diagram, the left side is the front and the right side is the rear), the other end is connected to the intersection of the extension line of the connecting line between the bottom end of the two support columns 210 on the left or right and the adjacent enlarged foundation 110 (i.e., Figure 2 As shown), the spacing between the two guy ropes 330 is equal to the spacing between the two support columns 210, and they are set along the longitudinal direction of the arch rib. This can better resist the horizontal force generated during the installation of the arch rib segments. Alternatively, they can be connected to the outside of the intersection line of the extension line of the connecting line of the bottom end of the two support columns 210 on the left or right side and the adjacent enlarged foundation 110. That is, both guy ropes 330 are inclined outward, and the spacing between the two guy ropes 330 is greater than the spacing between the two support columns 210.

[0044] Preferably, the enlarged foundation 110 is a reinforced concrete foundation, which can be installed by conventional reinforced concrete pouring.

[0045] Preferably, the top of the arch rib support body 200 is also provided with an adjustable support system 400, combined with Figure 7-9 As shown, the adjustable support system 400 includes a support beam 420, a top support 430, and a jack 410. The support beam 420 is arranged along the transverse direction of the bridge and fixed on the top of the arch rib support body 200. The top support 430 and the jack 410 are fixed on the top surface. The number of top supports 430 matches the number of arch rib chords above the arch rib support body 200. For example, in this embodiment, there are 4 chords at the bottom of the arch rib segment (2 left chords and 2 right chords), so there are 2 top supports 430. Each top support 430 includes two top support units, which are used to match the bottom sides of the corresponding supporting arch rib chords and transfer the arch rib load to the support beam 420. A jack 410 is arranged between the two top support units. By adjusting the extension length of the jack 410, the elevation can be quickly adjusted when the arch rib segment is aligned. In this embodiment, the support beam 420 is made of three H-beams welded together, and the jack 410 is a screw jack.

Claims

1. A self-anchored arch rib support, characterized in that... include: The wind load self-anchoring system is provided in multiple parts, including anchoring structures and enlarged foundations. The middle and lower parts of the anchoring structures extend into the ground foundation, and the upper part is fixed together with the enlarged foundation. The arch rib support body is matched and fixed on the enlarged foundation; The thrust self-anchoring system includes at least one set disposed between the arch rib support body and the wind load self-anchoring system adjacent to the arch rib support body, including a guy rope and a guy rope adjustment device. One end of the guy rope is connected to the upper side of the arch rib support body, and the other end is detachably connected to the enlarged foundation through the guy rope adjustment device.

2. The self-anchored arch rib support according to claim 1, characterized in that: The anchoring structure includes multiple pull-out anchors, the lower and middle parts of which extend into the ground foundation, and the upper parts which pass through the enlarged foundation and are fixed together.

3. The self-anchored arch rib support according to claim 2, characterized in that: The pull-out anchor is also equipped with an anchor plate and a nut. The anchor plate can pass through the top end of the pull-out anchor, and the nut can be screwed into the pull-out anchor and abut against the anchor plate, so that the anchor plate abuts against the top surface of the enlarged foundation. Reinforcing bars are pre-embedded in the enlarged foundation near its top surface and close to the pull-out anchor.

4. The self-anchored arch rib support according to claim 1, characterized in that: Each thrust self-anchoring system also includes a support column ear plate and a foundation ear plate. The support column ear plate is fixed to one side of the upper part of the arch rib support body, and the foundation ear plate is fixed to one side of the top surface of the enlarged foundation. One end of the guy rope is detachably connected to the arch rib support body through the support column ear plate, and the other end is connected to the movable end of the guy rope adjustment device. The fixed end of the guy rope adjustment device is detachably connected to the enlarged foundation through the foundation ear plate.

5. The self-anchored arch rib support according to claim 4, characterized in that: One end of the guy rope is connected to a shackle, which is detachably connected to the bracket column ear plate.

6. The self-anchored arch rib support according to any one of claims 1-5, characterized in that: A thrust self-anchoring system is provided on one side of the arch rib support body that is not fixed to the arch rib arch seat and whose corresponding arch rib segment is not connected by a guy rope.

7. The self-anchored arch rib support according to any one of claims 1-5, characterized in that: Each arch rib support body includes four support columns forming a cube. Each thrust self-anchoring system includes two guy ropes. One end of each guy rope is connected to one of the two support columns at the front / rear of the arch rib support body, and the other end is connected to the intersection line of the extension line of the connecting line between the bottom ends of the two support columns on the same left or right side and the adjacent enlarged foundation, or connected to the outside of the intersection line of the extension line of the connecting line between the bottom ends of the two support columns on the same left or right side and the adjacent enlarged foundation.

8. The self-anchored arch rib support according to any one of claims 1-5, characterized in that: The guy rope adjustment device is a hand-operated hoist.

9. The self-anchored arch rib support according to any one of claims 1-3, characterized in that: The enlarged foundation is a reinforced concrete foundation.

10. The self-anchored arch rib support according to claim 1, characterized in that: An adjustable support system is also provided on the top of the arch rib support body. The adjustable support system includes a support beam, a top support, and a jack. The support beam is arranged along the transverse direction of the bridge and fixed on the top of the arch rib support body. The top support and the jack are fixed on the top surface. The top support includes two top support units for matching the bottom sides of the corresponding support arch rib chord. The jack is arranged between the two top support units.

Images