Arch springing joint structure and concrete-filled steel tube arch bridge

Abstract

The utility model discloses an arch foot joint structure and a concrete-filled steel tube arch bridge. The arch foot joint structure comprises an arch seat, a hinge joint, an arch foot and a fixing device, the hinge joint is arranged on the skewback, and the hinge joint is provided with a groove extending in the first direction; one end of the arch foot is provided with a hinge shaft, the hinge shaft is matched with the groove, and the hinge shaft is rotationally installed in the groove along the axis in the first direction so that the angle of the arch foot can be adjusted; and the fixing device covers the peripheries of the hinge joint and the hinge shaft, so that the fixing device is used for fixing the arch springing and the hinge joint with the skewback after the arch springing is rotationally arranged at a set position. The arch springing can be dynamically adjusted according to construction monitoring and measurement data, and the problems that in the construction process, a main arch section is difficult to install, and the line shape is difficult to adjust are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of bridge construction, in particular to an arch foot joint structure and a steel tube concrete arch bridge. Background Art

[0002] Concrete-filled steel tube arch bridges are a new technology in bridge construction that has been developed in recent years. They offer the advantages of light weight, high strength, and strong resistance to deformation. They effectively address the numerous challenges of bridge construction: requiring less material, requiring less installation weight, being simple to construct, and possessing a high load-bearing capacity. They are an ideal structural form for long-span arch bridges. The main arch is the primary load-bearing part of a concrete-filled steel tube arch bridge, and its design and construction quality directly impact the bridge's load-bearing capacity and safety. The main arch is constructed using a segmented approach with on-site assembly.

[0003] Patent CN106758748A discloses a large-span steel tube concrete arch bridge structure, including a main arch ring, arch columns arranged on the main arch ring, and arch beams supported by the arch columns. The main arch ring is provided with a left arch rib and a right arch rib, and the spacing between the left arch rib and the right arch rib gradually decreases from the arch foot to the arch top, so that the plane projection of the main arch ring is X-shaped; the left arch rib and the right arch rib are connected and fixed by horizontal braces and diagonal braces.

[0004] The above-mentioned existing technology pre-buries the first segment of the main arch in the arch foot and pours it simultaneously with the arch foot concrete, forming an immobile consolidated state. Since the pre-arch degree reserved by theoretical calculation is not completely consistent with the actual value and construction deviations are inevitable during the construction process, it is difficult to install the main arch segment and adjust the linear shape of large-span steel tube concrete arch bridges during construction. Utility Model Content

[0005] The purpose of the utility model is to overcome the above-mentioned technical deficiencies and propose an arch foot joint structure to solve the technical problems in the prior art that the pre-arch degree reserved by theoretical calculation is not completely consistent with the actual value and construction deviations are inevitable during the construction process, resulting in difficulty in installing the main arch segment and difficulty in adjusting the linear shape during construction.

[0006] In order to achieve the above technical purpose, the present invention adopts the following technical solutions:

[0007] The utility model provides an arch foot joint structure, comprising:

[0008] arch seat;

[0009] A hinged head, provided on the arch seat, wherein the hinged head is provided with a groove extending along a first direction;

[0010] An arch foot, wherein a hinge shaft is provided at one end of the arch foot, the hinge shaft is adapted to the groove, and the hinge shaft is rotatably installed in the groove along an axis in a first direction, so that the angle of the arch foot is adjustable; and

[0011] A fixing device is covered on the hinge head and the outer periphery of the hinge shaft, so that after the arch foot is rotated to set a set position, the fixing device is used to fix the arch foot and the hinge head to the arch seat.

[0012] In some embodiments, the hinge joint includes an embedded steel plate, a plurality of steel bars, a plurality of support plates and an arc-shaped plate. The embedded steel plate is arranged on the upper side of the arch seat. The plurality of steel bars are embedded in the arch seat in an array and connected to the embedded steel plate. The plurality of support plates are arranged on the upper side of the embedded steel plate at intervals along the first direction. The arc-shaped plate is arranged on the plurality of support plates, and the arc-shaped plates constitute the groove.

[0013] In some embodiments, the hinge joint further comprises a plurality of stiffening steel plates, wherein the stiffening steel plates are located between two adjacent support plates, and the stiffening steel plates connect the two adjacent support plates and the arc-shaped plate.

[0014] In some embodiments, the arch foot includes multiple main arch steel tubes and hinge axis steel tubes, the multiple main arch steel tubes are arranged in an array, the hinge axis steel tube is located between the multiple main arch steel tubes, the hinge axis steel tube and the main arch steel tube are connected by diagonal braces, and the main arch steel tube and the main arch steel tube are connected by diagonal braces, and the hinge axis steel tube constitutes the hinge axis.

[0015] In some embodiments, the fixing device includes a post-cast strip, which is covered on the hinge joint, the end of the main arch steel pipe and the outer periphery of the hinge axis steel pipe and is connected to the arch seat as a whole.

[0016] In some embodiments, the arch foot joint structure further includes a plurality of pre-buried steel pipes, each of which corresponds to a plurality of main arch steel pipes on a one-to-one basis, and each of the pre-buried steel pipes has the same diameter as the main arch steel pipes. One end of each pre-buried steel pipe is pre-buried in the arch seat, and the other end of each pre-buried steel pipe is connected to the corresponding main arch steel pipe.

[0017] The post-casting strip is penetrated by a plurality of avoidance holes, and the avoidance holes are used for the pre-buried steel pipes and the main arch steel pipes to pass through.

[0018] In some embodiments, the embedded steel pipe is spaced apart from the main arch steel pipe;

[0019] The fixing device also includes a butt joint steel pipe, which is located in the avoidance hole. The butt joint steel pipe has the same diameter as the embedded steel pipe, so that after the arch foot is rotated to set a set position, the butt joint steel pipe connects the embedded steel pipe and the main arch steel pipe.

[0020] In some embodiments, a bottom sealing steel plate is further provided at the bottom of the embedded steel pipe, and the diameter of the bottom sealing steel plate is larger than that of the embedded steel pipe.

[0021] In some embodiments, the diameter of the groove is 1 m, the thickness of the post-cast strip is 2 m, and the hinge axis is located in the middle of the post-cast strip.

[0022] In addition, the utility model also provides a steel tube concrete arch bridge, which includes the arch foot joint structure.

[0023] Compared with the prior art, the utility model provides an arch foot joint structure, in which the arch seat is provided with an inclined mounting surface, the hinge head is installed on the mounting surface of the arch seat, and the upper side of the hinge head is provided with a semi-cylindrical groove, and one end of the arch foot is provided with a hinge shaft, the diameter of the hinge shaft is the same as the diameter of the groove, and the hinge shaft is rotatably installed in the groove, so that the arch foot can be rotatably set. Before the main arch is closed, the arch foot is always in a rotatable hinged state. During the main arch hoisting stage, the arch foot can be dynamically adjusted according to construction monitoring and measurement data, so as to solve the problems of difficult installation of main arch segments and difficult adjustment of linear shape during construction.

[0024] The fixing device is wrapped around the hinge head and the outer periphery of the hinge shaft after the adjustment of the arch foot is completed, thereby fixing the arch foot and the hinge head to the arch seat, effectively improving the connection strength between the arch foot and the arch seat.

[0025] The above description is only an overview of the technical solution of the present invention. In order to enable a clearer understanding of the technical means of the present invention and to implement it according to the contents of the specification, the preferred embodiments of the present invention are described in detail below with reference to the accompanying drawings. The specific implementation methods of the present invention are given in detail in the following embodiments and the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a structural diagram of an embodiment of the arch foot joint structure provided by the utility model;

[0027] Figure 2 yes Figure 1 Exploded diagram of the middle arch foot joint structure;

[0028] Figure 3 yes Figure 1 A three-dimensional diagram of the median arch foot;

[0029] Figure 4 yes Figure 1 A three-dimensional schematic diagram of the middle hinge joint;

[0030] Figure 5 yes Figure 1 Cross-sectional view of the middle hinge joint;

[0031] Figure 6 yes Figure 1 Schematic diagram of the embedded steel pipe.

[0032] Description of reference numerals:

[0033] 1-arch seat, 2-hinge joint, 21-embedded steel plate, 22-rebar, 23-support plate, 24-arc plate, 25-stiffening steel plate, 26-base steel plate, 3-arch foot, 31-main arch steel pipe, 32-hinge axis steel pipe, 33-diagonal brace, 4-fixing device, 41-post-cast strip, 42-butt steel pipe, 43-outerwrapped steel pipe, 5-embedded steel pipe, 51-bottom steel plate, 52-stiffening rib. DETAILED DESCRIPTION

[0034] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0035] In order to solve the technical problems in the prior art that the pre-arch degree reserved by theoretical calculation is not completely consistent with the actual value and construction deviations are inevitable during the construction process, resulting in difficulties in installing the main arch segments and adjusting the linear shape during the construction process, the utility model provides an arch foot joint structure. Before the main arch is closed, the arch foot is always in a rotatable hinged state. During the main arch hoisting stage, the arch foot can be dynamically adjusted according to construction monitoring and measurement data, thereby solving the problems of difficulties in installing the main arch segments and adjusting the linear shape during the construction process.

[0036] See also Figure 1 , Figure 1 Schematic diagram of the structure of the arch foot joint structure in one embodiment of the present invention.

[0037] The utility model provides an arch foot 3 joint structure, comprising an arch seat 1, a hinge head 2, an arch foot 3 and a fixing device 4; the hinge head 2 is arranged on the arch seat 1, and the hinge head 2 is provided with a groove extending along a first direction; one end of the arch foot 3 is provided with a hinge shaft, and the hinge shaft is adapted to the groove, and the hinge shaft is rotatably installed in the groove along the axis in the first direction, so that the angle of the arch foot 3 is adjustable; and the fixing device 4 is covered on the hinge head 2 and the outer periphery of the hinge shaft, so that after the arch foot 3 is rotated to set a set position, the fixing device 4 is used to fix the arch foot 3 and the hinge head 2 to the arch seat 1.

[0038] In this example, see Figures 1 to 2The arch seat 1 is provided with an inclined mounting surface, the hinge head is installed on the mounting surface of the arch seat 1, and a semi-cylindrical groove is provided on the upper side of the hinge head 2. A hinge shaft is provided at one end of the arch foot 3, and the diameter of the hinge shaft is the same as the diameter of the groove. The hinge shaft is rotatably installed in the groove, so that the arch foot 3 can be rotatably set. Before the main arch is closed, the arch foot 3 is always in a rotatable hinged state. During the main arch hoisting stage, the arch foot 3 can be dynamically adjusted according to construction monitoring and measurement data to solve the problem of difficult installation of main arch segments and difficult adjustment of the linear shape during construction.

[0039] In this embodiment, the arch seat 1 is made of concrete.

[0040] In some embodiments, see Figures 4 and 5 The hinge joint 2 includes an embedded steel plate 21, multiple steel bars 22, multiple support plates 23 and an arc-shaped plate 24. The embedded steel plate 21 is arranged on the upper side of the arch seat 1. The multiple steel bars 22 are embedded in the arch seat 1 in an array and connected to the embedded steel plate 21. The multiple support plates 23 are arranged on the upper side of the embedded steel plate 21 at intervals along the first direction. The arc-shaped plate 24 is arranged on the multiple support plates 23. The arc-shaped plate 24 constitutes the groove.

[0041] In this embodiment, multiple steel bars 22 are welded to the side of the embedded steel plate 21 facing the arch seat 1, and multiple support plates 23 are welded to the side of the embedded steel plate 21 away from the arch seat 1. The steel bars 22 are embedded in the arch seat 1, and the embedded steel plate 21 is embedded in the installation surface of the arch seat 1. The embedded steel plate 21 is flush with the installation surface of the arch seat 1. The distance between two adjacent support plates 23 is between 20cm and 30cm. The support plate 23 is provided with an arc-shaped installation groove. The arc-shaped plate 24 is located in multiple installation grooves, and the arc-shaped plate 24 is connected to the support plate 23 to form the groove.

[0042] In some embodiments, see Figures 4 and 5 The hinge joint 2 further includes a plurality of stiffening steel plates 25 , wherein the stiffening steel plates 25 are located between two adjacent support plates 23 , and the stiffening steel plates 25 connect the two adjacent support plates 23 and the arc-shaped plate 24 .

[0043] In this embodiment, the length of the reinforcing steel plate 25 is the same as the spacing between two adjacent support plates, and the reinforcing steel plate 25 is welded to the support plates at both ends along the first direction. The reinforcing steel plate 25 is also welded to the arc plate 24. By providing multiple reinforcing steel plates 25, the connection strength between the support plates and between the support plates and the arc plate 24 can be improved.

[0044] In this embodiment, the hinged joint 2 also includes a base steel plate 26, the size of which is slightly smaller than the embedded steel plate 21. The base steel plate 26 is welded to the side of the embedded steel plate 21 away from the arch seat 1, and the support plate 23 is welded to the base steel plate 26.

[0045] In this embodiment, a plurality of stiffening steel plates 25 are provided between two adjacent support plates, and the plurality of stiffening steel plates 25 are arranged at intervals along the circumference of the arc-shaped plate 24 .

[0046] In some embodiments, see Figure 3 The arch foot 3 includes a plurality of main arch steel tubes 31 and hinge axis steel tubes 32. The plurality of main arch steel tubes 31 are arranged in an array. The hinge axis steel tubes 32 are located between the plurality of main arch steel tubes 31. The hinge axis steel tubes 32 and the main arch steel tubes 31 are connected with each other through diagonal braces 33, and the hinge axis steel tubes 32 constitute the hinge axis.

[0047] In this embodiment, there are four main arch steel tubes 31, and the four main arch steel tubes 31 are arranged in an array, and the main arch steel tubes 31 are connected to each other through diagonal braces 33. The hinge axis steel tube 32 is located between the four main arch steel tubes 31 and extends along the first direction. The hinge axis steel tube 32 is connected to the four main arch steel tubes 31 through diagonal braces 33. The outer diameter of the hinge axis steel tube 32 is the same as the inner diameter of the arc plate 24. The hinge axis steel tube 32 is arranged inside the arc plate 24, so that the arch foot 3 can be rotatably set.

[0048] In this embodiment, the interior of the hinged axis steel pipe 32 is poured with C55 concrete.

[0049] In some embodiments, see Figures 1 to 2 The fixing device 4 includes a post-cast strip 41, which covers the hinge joint 2, the end of the main arch steel pipe 31 and the outer periphery of the hinge axis steel pipe 32 and is connected to the arch seat 1 as a whole.

[0050] In this embodiment, after the position adjustment of the arch foot 3 is completed, concrete can be poured in the area of ​​the arch seat 1, the hinge head 2, the main arch steel pipe 31 and the hinge axis steel pipe 32 to form a post-cast strip 41, thereby connecting the arch foot 3 and the arch seat 1 to form an integral structure to improve the connection strength.

[0051] In some embodiments, see Figure 6The joint structure of the arch foot 3 also includes a plurality of pre-buried steel pipes 5, which correspond one-to-one to the plurality of main arch steel pipes 31. The pre-buried steel pipes 5 have the same diameter as the main arch steel pipes 31. One end of the pre-buried steel pipe 5 is pre-buried in the arch seat 1, and the other end of the pre-buried steel pipe 5 is connected to the corresponding main arch steel pipe 31. The post-cast strip 41 is provided with a plurality of avoidance holes, which are used for the pre-buried steel pipes 5 and the main arch steel pipes 31 to pass through.

[0052] In this embodiment, in order to improve the connection strength between the arch seat 1 and the main arch steel pipe 31, the arch seat 1 is also pre-buried with a pre-buried steel pipe 5. The upper end of the pre-buried steel pipe 5 extends out of the arch seat 1 and corresponds to the main arch steel pipe 31. After the adjustment of the arch foot 3 is completed, the main arch steel pipe 31 can be fixedly connected to the pre-buried steel pipe 5 to enhance the strength of the arch foot 3.

[0053] In some embodiments, see Figure 2 , the embedded steel pipe 5 and the main arch steel pipe 31 are arranged at intervals; the fixing device 4 also includes a docking steel pipe 42, the docking steel pipe 42 is located in the avoidance hole, and the docking steel pipe 42 has the same diameter as the embedded steel pipe 5, so that after the arch foot 3 is rotated to set the set position, the docking steel pipe 42 connects the embedded steel pipe 5 and the main arch steel pipe 31.

[0054] In this embodiment, in order to facilitate the adjustment of the arch foot 3, a gap of 20 cm is spaced between the embedded steel pipe 5 and the main arch steel pipe 31. After the adjustment of the arch foot 3 is completed, the embedded steel pipe 5 needs to be connected to the main arch steel pipe 31. Therefore, a docking steel pipe 42 is further provided between the embedded steel pipe 5 and the main arch steel pipe 31. The docking steel pipe 42 is respectively welded to the embedded steel pipe 5 and the main arch steel pipe 31, thereby realizing a fixed connection between the embedded steel pipe 5 and the main arch steel pipe 31.

[0055] In this embodiment, the diameter of the butt joint steel pipe 42 is the same as the diameter of the embedded steel pipe 5 and the diameter of the main arch steel pipe 31, and the length of the butt joint steel pipe 42 can be adjusted according to the distance between the embedded steel pipe 5 and the main arch steel pipe 31 during installation.

[0056] In this embodiment, the fixing device 4 also includes a plurality of outer steel pipes 43, and the plurality of outer steel pipes 43 correspond one-to-one to the plurality of avoidance holes. The outer steel pipes 43 are arranged in the avoidance holes, and the inner diameter of the outer steel pipe 43 is the same as the outer shape of the docking steel pipe 42. The outer steel pipe 43 is outwrapped on the outer periphery of the docking steel pipe 42 and part of the embedded steel pipe 5 and the main arch steel pipe 31.

[0057] In some embodiments, see Figure 6A bottom steel plate 51 is also provided at the bottom of the embedded steel pipe 5 , and the diameter of the bottom steel plate 51 is larger than that of the embedded steel pipe 5 .

[0058] In this embodiment, the bottom steel plate 51 is welded to the bottom of the embedded steel pipe 5 , and a plurality of stiffening ribs 52 are provided on the circumference of the bottom steel plate 51 and the embedded steel pipe 5 .

[0059] In some embodiments, the diameter of the groove is 1 m, the thickness of the post-cast strip 41 is 2 m, and the hinge axis is located in the middle of the post-cast strip 41 .

[0060] In addition, the utility model also provides a steel tube concrete arch bridge, which includes the arch foot 3 joint structure.

[0061] The specific embodiments of the present invention described above do not limit the scope of protection of the present invention. Any other corresponding changes and modifications made based on the technical concept of the present invention should be included in the scope of protection of the claims of the present invention.

Claims

1. An arch foot joint structure, characterized in that: It includes: arch seat; A hinged head, provided on the arch seat, wherein the hinged head is provided with a groove extending along a first direction; An arch foot, wherein one end of the arch foot is provided with a hinge shaft, the hinge shaft is adapted to the groove, and the hinge shaft is rotatably installed in the groove along an axis in a first direction, so that the angle of the arch foot is adjustable; as well as A fixing device is covered on the hinge head and the outer periphery of the hinge shaft, so that after the arch foot is rotated to set a set position, the fixing device is used to fix the arch foot and the hinge head to the arch seat.

2. The arch foot joint structure according to claim 1, characterized in that: The hinge joint includes an embedded steel plate, multiple steel bars, multiple support plates and an arc-shaped plate. The embedded steel plate is arranged on the upper side of the arch seat. The multiple steel bars are embedded in the arch seat in an array and connected to the embedded steel plate. The multiple support plates are arranged on the upper side of the embedded steel plate at intervals along the first direction. The arc-shaped plate is arranged on the multiple support plates. The arc-shaped plates constitute the groove.

3. The arch foot joint structure according to claim 2, characterized in that: The hinge joint further includes a plurality of stiffening steel plates, wherein the stiffening steel plates are located between two adjacent support plates and connect the two adjacent support plates and the arc-shaped plate.

4. The arch foot joint structure according to claim 1, characterized in that: The arch foot includes multiple main arch steel tubes and hinge axis steel tubes. The multiple main arch steel tubes are arranged in an array. The hinge axis steel tube is located between the multiple main arch steel tubes. The hinge axis steel tube and the main arch steel tube are connected with each other through diagonal braces. The hinge axis steel tube constitutes the hinge axis.

5. The arch foot joint structure according to claim 4, characterized in that: The fixing device includes a post-cast strip, which covers the hinge joint, the end of the main arch steel pipe and the outer periphery of the hinge axis steel pipe and is connected to the arch seat as a whole.

6. The arch foot joint structure according to claim 5, characterized in that: The arch foot joint structure further includes a plurality of pre-buried steel pipes, each of which corresponds to a plurality of main arch steel pipes on a one-to-one basis. The pre-buried steel pipes have the same diameter as the main arch steel pipes, one end of each pre-buried steel pipe is pre-buried in the arch seat, and the other end of each pre-buried steel pipe is connected to the corresponding main arch steel pipe. The post-casting strip is penetrated by a plurality of avoidance holes, and the avoidance holes are used for the pre-buried steel pipes and the main arch steel pipes to pass through.

7. The arch foot joint structure according to claim 6, characterized in that: The embedded steel pipe and the main arch steel pipe are spaced apart; The fixing device also includes a butt joint steel pipe, which is located in the avoidance hole. The butt joint steel pipe has the same diameter as the embedded steel pipe, so that after the arch foot is rotated to set a set position, the butt joint steel pipe connects the embedded steel pipe and the main arch steel pipe.

8. The arch foot joint structure according to claim 6, characterized in that: A bottom sealing steel plate is also provided at the bottom of the embedded steel pipe, and the diameter of the bottom sealing steel plate is larger than that of the embedded steel pipe.

9. The arch foot joint structure according to claim 5, characterized in that: The diameter of the groove is 1m, the thickness of the post-cast strip is 2m, and the hinge axis is located in the middle of the post-cast strip.

10. A steel tube concrete arch bridge, characterized in that: The steel tube concrete arch bridge includes the arch foot joint structure according to any one of claims 1 to 9.

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