A method of connecting a concrete arch rib foot segment to an abutment

Abstract

The application provides a connecting method for a concrete arch rib arch foot segment and an arch seat, comprising the following steps: S1, fixing arch rib embedded steel plates and arch rib embedded positioning pieces at the bottom of the arch foot segment of the arch rib at intervals, and fixing arch seat embedded steel plates and arch seat embedded positioning pieces on the arch seat; S2, hoisting the arch foot segment to the arch seat, so that the arch seat embedded positioning pieces and the arch rib embedded positioning pieces are in contact, and full welding is adopted to weld the arch rib embedded steel plates and the arch seat embedded steel plates by using connecting steel plates; S3, disconnecting the arch foot segment and the hoisting device, and then welding the arch seat embedded steel bars on the arch seat and the arch rib embedded steel bars of the arch foot segment; S4, after the remaining segments of the arch rib are installed and the arch rib closure is completed, welding the contact surfaces of the arch rib embedded positioning pieces and the arch seat embedded positioning pieces firmly; and S5, pouring concrete at the sealing foot area of the arch seat and the bottom end of the arch foot segment, so as to realize the connection of the arch seat and the arch foot segment. The method can realize the rapid positioning and connection of the arch foot segment and the arch seat.

Description

Technical Field

[0001] This invention relates to the field of bridge construction technology, specifically to a method for connecting the arch foot segment of a concrete arch rib to the arch seat. Background Technology

[0002] In existing technologies, the installation of the arch foot segments of concrete arch ribs generally involves erecting supports to fix the arch rib, and then welding the pre-embedded reinforcing bars of the arch foot segments to the pre-embedded reinforcing bars of the arch seat. However, due to the large number of pre-embedded reinforcing bars in the arch foot segments, they are prone to tangling during installation, making it difficult to position the arch foot segments. Furthermore, the pre-embedded reinforcing bars are flexible, requiring the welding of most of them to provide sufficient support for the arch foot segments and achieve effective temporary consolidation, thus enabling their positioning. However, because the pre-embedded reinforcing bars are flexible and easily deformed under stress, if the pre-embedded reinforcing bars are not welded in a timely manner, the positioning of the arch foot segments is highly likely to change during the welding process, significantly impacting the entire arch rib installation. It can also easily lead to the main reinforcing bars of the arch foot segments being misaligned and unable to connect with the main reinforcing bars of other arch rib segments, thus affecting the internal structure of the arch rib. Summary of the Invention

[0003] To address the difficulty in positioning the arch foot segment of a concrete arch rib to the arch seat, this invention provides a method for connecting the arch foot segment of a concrete arch rib to the arch seat. This method enables rapid positioning and connection of the arch foot segment and the arch seat, ensuring the accuracy of the arch rib positioning and connection, and providing favorable conditions for subsequent welding of the main reinforcement bars.

[0004] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0005] A method for connecting a concrete arch rib foot segment to an arch seat includes the following steps:

[0006] S1, the arch rib embedded steel plate and the arch rib embedded positioning piece are fixed at intervals at the bottom of the arch foot segment of the arch rib, and the arch seat embedded steel plate is fixed on the arch seat corresponding to the arch rib embedded steel plate, and the arch seat embedded positioning piece is fixed on the arch seat corresponding to the arch rib embedded positioning piece.

[0007] S2, the arch foot segment is hoisted to the arch seat using a hoisting device, so that the arch seat pre-embedded positioning part comes into contact with the arch rib pre-embedded positioning part. Then the position of the arch foot segment is adjusted. After the arch foot segment is adjusted to the position, the arch rib pre-embedded steel plate and the arch seat pre-embedded steel plate are fully welded together using connecting steel plates to complete the temporary consolidation of the arch foot segment.

[0008] S3, disconnect the arch foot segment from the hoisting device, and then weld the arch seat embedded steel bars on the arch seat to the arch rib embedded steel bars of the arch foot segment;

[0009] S4. After the remaining segments of the arch rib are installed and the arch rib is closed, the contact surfaces of the pre-embedded positioning parts of the arch rib and the pre-embedded positioning parts of the arch seat are welded firmly.

[0010] S5, concrete is poured at the sealing area of ​​the arch seat and the bottom end of the arch foot segment to achieve the connection between the arch seat and the arch foot segment.

[0011] Furthermore, the arch rib is a steel box arch formed by connecting several arch boxes in sequence. The arch rib is pre-embedded with a steel plate and fixed on the arch box of the arch foot segment and on the top plate of the arch box. The arch rib is pre-embedded with a positioning component and fixed on the bottom plate of the arch box of the arch foot segment.

[0012] Furthermore, the arch seat embedded steel plate and the arch rib embedded steel plate are parallel and spaced apart from each other, and several connecting steel plates are provided. The several connecting steel plates are spaced apart along the length direction of the arch rib embedded steel plate, and the opposite ends of each connecting steel plate are fully welded to the arch rib embedded steel plate and the arch seat embedded steel plate, respectively.

[0013] Furthermore, the connecting steel plate is an I-beam.

[0014] Furthermore, the arch seat pre-embedded positioning component is provided with a positioning groove parallel to the arch seat pre-embedded steel plate, and the arch rib pre-embedded positioning component is slidably inserted into the positioning groove. When the arch foot segment is subjected to force, the arch rib pre-embedded positioning component can move along the positioning groove, thereby adjusting the position of the arch foot segment.

[0015] Furthermore, the arch seat pre-embedded positioning component includes a support plate, a connecting plate, and an arch seat angle steel, all pre-embedded on the arch seat. One side of the connecting plate is vertically fixed to the top side of the support plate near the arch rib. The arch seat angle steel is fixed to the bottom side of the support plate and located on the side of the support plate facing away from the connecting plate. The arch seat angle steel and the support plate together form the positioning groove.

[0016] Furthermore, the arch rib pre-embedded positioning component is made of angle steel and includes a fixing plate and a positioning plate. The fixing plate is fixed to the outer side of the bottom plate of the arch box, and the positioning plate is vertically connected to the bottom side of the fixing plate and located on the side of the fixing plate facing the top plate of the arch box. When the arch rib pre-embedded positioning component is inserted into the positioning groove, the fixing plate contacts the support plate, and the positioning plate contacts the arch seat angle steel.

[0017] Furthermore, in step S4, the weld between the pre-embedded positioning component of the arch rib and the pre-embedded positioning component of the arch seat is a fillet weld with a weld height of 18mm.

[0018] Furthermore, the arch box of the arch foot segment is provided with at least one concrete injection hole. In step S5, concrete is poured into the bottom end of the arch foot segment and the sealing area through the concrete injection hole.

[0019] Furthermore, the pre-embedded steel bars of the arch seat are welded to the pre-embedded steel bars of the arch ribs on the top plate and web plate of the arch box of the arch foot segment.

[0020] By adopting the above technical solution, the present invention has the following beneficial effects:

[0021] The aforementioned method for connecting the arch rib and arch foot segments to the arch seat involves setting embedded steel plates on the arch seat and embedded steel plates on the arch rib segments. After the arch foot segments are hoisted into place, connecting steel plates are used to fully weld the embedded steel plates on the arch seat and the embedded steel plates on the arch rib to achieve temporary fixation of the arch foot. Then, all the embedded steel bars are welded. Because the hardness and strength of the steel plates are greater than those of the steel bars, their supporting force on the arch foot segments is greater. Therefore, compared to the existing method that requires welding most of the embedded steel bars for temporary fixation of the arch foot, using embedded steel plates on the arch seat, embedded steel plates on the arch rib, and connecting steel plates for temporary fixation of the arch foot reduces the amount of welding work, thereby enabling rapid positioning and connection of the arch foot segments and shortening the hoisting and positioning time of the arch foot segments.

[0022] Meanwhile, by using connecting steel plates to fully weld the pre-embedded steel plates of the arch seat and the pre-embedded steel plates of the arch rib to complete the temporary consolidation of the arch foot before welding all the pre-embedded steel bars, the arch foot segments are supported by connecting steel plates during installation. This avoids the situation where the pre-embedded steel bars are deformed due to stress, which would affect the positioning of the arch foot segments. This ensures the accuracy of the arch rib positioning and connection, and provides favorable conditions for the subsequent welding of the main reinforcement bars.

[0023] The above-mentioned method for connecting the arch foot segment of the concrete arch rib to the arch seat can improve the efficiency of hoisting and positioning the arch foot segment by cooperating with the pre-embedded positioning parts of the arch seat and the arch rib. Attached Figure Description

[0024] Figure 1 This is a structural diagram of the connection method between the arch foot segment and the arch seat of a concrete arch rib according to a preferred embodiment of the present invention, when the arch seat and the arch foot segment are not connected.

[0025] Figure 2 for Figure 1 Enlarged view of the structure at point A.

[0026] Figure 3 This is a structural diagram showing the connection method between the arch foot segment and the arch seat of the concrete arch rib according to a preferred embodiment of the present invention, in which the arch seat and the arch foot segment are in a connected state.

[0027] Figure 4 for Figure 3 A three-dimensional structural diagram of the connecting steel plate.

[0028] Explanation of main component symbols

[0029] 10. Arch foot segment; 12. Arch box top plate; 13. Arch box bottom plate; 14. Arch box web plate; 15. Arch rib embedded steel bars; 16. Concrete pouring hole; 20. Arch rib embedded steel plate; 30. Arch rib embedded positioning component; 31. Fixing plate; 33. Positioning plate; 60. Arch seat; 61. Arch seat embedded steel bars; 70. Arch seat embedded steel plate; 80. Arch seat embedded positioning component; 81. Positioning groove; 811. Support plate; 812. Connecting plate; 813. Arch seat angle steel; 90. Connecting steel plate. Detailed Implementation

[0030] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0031] It should be noted that when a component is described as "fixed to" another component, it can be directly on the other component or may have a component in between. When a component is considered "connected to" another component, it can be directly connected to the other component or may have a component in between. When a component is considered "set on" another component, it can be directly set on the other component or may have a component in between. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0032] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0033] Please also see Figures 1 to 4 A preferred embodiment of the present invention provides a method for connecting a concrete arch rib foot segment and an arch seat, comprising the following steps:

[0034] S1, the arch rib embedded steel plate 20 and the arch rib embedded positioning piece 30 are fixed at intervals at the bottom end of the arch foot segment 10 of the arch rib, and the arch seat embedded steel plate 70 is fixed on the arch seat 60 corresponding to the arch rib embedded steel plate 20, and the arch seat embedded positioning piece 80 is fixed on the arch seat 60 corresponding to the arch rib embedded positioning piece 30.

[0035] In this embodiment, the arch rib is a steel box arch formed by sequentially connecting several arch boxes (not shown). Each arch box includes an arch box top plate 12, an arch box bottom plate 13, and two arch box web plates 14. The arch box top plate 12 and the arch box bottom plate 13 are arranged parallel and spaced apart. The two arch box web plates 14 are respectively located on opposite sides of the arch box top plate 12. Each arch box web plate 14 is fixedly connected to the arch box top plate 12 and the arch box bottom plate 13 to form a hollow arch box with open ends. Embedded steel bars 15 are welded and fixed to the arch box top plate 12 and the arch box web plates 14 of the arch foot segment 10. The arch box of the arch foot segment 10 is provided with at least one concrete pouring hole 16. In this embodiment, the concrete pouring hole 16 is opened on the arch box top plate 12. The structure of the arch box is prior art and will not be described in detail here for brevity.

[0036] In this embodiment, the arch rib embedded steel plate 20 is fixed to the arch box of the arch foot segment 10 and can be fixed to the top plate 12 of the arch box by welding or other means. The arch rib embedded steel plate 20 and the arch rib embedded steel bars 15 at the top plate 12 of the arch box are spaced apart. The length direction of the arch rib embedded steel plate 20 is parallel to the width direction of the top plate 12 of the arch box. The arch rib embedded positioning component 30 is fixed to the bottom plate 13 of the arch box of the arch foot segment 10. In this embodiment, the arch rib embedded positioning component 30 is made of angle steel and includes a fixing plate 31 and a positioning plate 33. The fixing plate 31 can be fixed to the outer side of the bottom plate 13 of the arch box of the arch foot segment 10 by welding or other means. The positioning plate 33 is vertically connected to the bottom side of the fixing plate 31 and is located on the side of the fixing plate 31 facing the top plate 12 of the arch box.

[0037] The arch seat embedded steel plate 70 and the arch rib embedded steel plate 20 are parallel and spaced apart. The arch seat embedded steel plate 70 is embedded in the concrete of the arch seat 60 during concrete pouring. The arch seat embedded positioning component 80 is provided with a positioning groove 81, which extends along the length of the arch seat embedded steel plate 70. The positioning groove 81 is used for sliding connection with the arch rib embedded positioning component 30. In this embodiment, the arch seat embedded positioning component 80 includes a support plate 811, a connecting plate 812, and an arch seat angle steel 813, all embedded in the arch seat 60. One side of the connecting plate 812 is vertically fixed to the top side of the support plate 811 near the arch rib. The arch seat angle steel 813 is fixed to the bottom side of the support plate 811 and located on the side of the support plate 811 facing away from the connecting plate 812. The arch seat angle steel 813 and the support plate 811 together form the positioning groove 81. The arch seat 60 is pre-embedded with arch seat pre-embedded steel bars 61, which are spaced apart from the arch seat pre-embedded steel plates 70.

[0038] S2, the arch foot segment 10 is hoisted to the arch seat 60 by a tower crane or other hoisting device (not shown in the figure), so that the arch seat pre-embedded positioning part 80 and the arch rib pre-embedded positioning part 30 come into contact. Then the position of the arch foot segment 10 is adjusted. After the arch foot segment 10 is adjusted into place, the arch rib pre-embedded steel plate 20 and the arch seat pre-embedded steel plate 70 are fully welded by connecting steel plate 90 to complete the temporary consolidation of the arch foot segment 10.

[0039] In this embodiment, during the hoisting of the arch foot segment 10, the arch seat embedded positioning component 80 and the arch rib embedded positioning component 30 first come into contact to position the vertical position of the arch foot segment 10. During this process, the arch rib embedded positioning component 30 is slidably inserted into the positioning groove 81, and when the arch rib embedded positioning component 30 is inserted into the positioning groove 81, the fixing plate 31 contacts the support plate 811, and the positioning plate 33 contacts the arch seat angle steel 813. After the arch rib embedded positioning component 30 is inserted into the positioning groove 81, when the arch foot segment 10 is subjected to force, the arch rib embedded positioning component 30 can move along the positioning groove 81, thereby adjusting the position of the arch foot segment 10.

[0040] In this embodiment, several connecting steel plates 90 are provided, and these connecting steel plates 90 are spaced apart along the length direction of the arch rib embedded steel plate 20. The opposite ends of each connecting steel plate 90 are fully welded to the arch rib embedded steel plate 20 and the arch seat embedded steel plate 70, respectively. Specifically, the connecting steel plates 90 are I-beams.

[0041] S3, disconnect the arch foot segment 10 from the hoisting device, and then weld the arch seat embedded steel bar 61 on the arch seat 60 to the arch rib embedded steel bar 15 of the arch foot segment 10.

[0042] In this embodiment, after the hoisting device connecting the arch foot segment 10 is released, the position of the arch foot segment 10 is checked and repositioned: if the position of the arch foot segment 10 is in the design position, the arch seat embedded steel bar 61 on the arch seat 60 is welded to the arch rib embedded steel bar 15 of the arch foot segment 10. Specifically, the arch seat embedded steel bar 61 is welded to the arch box top plate 12 and the arch box web plate 14 of the arch foot segment 10. If the position of the arch foot segment 10 is outside the design position, the arch rib embedded positioning part 30 of the arch foot segment 10 is moved along the positioning groove 81 to adjust the position of the arch foot segment 10 until the position of the arch foot segment 10 is adjusted into place.

[0043] S4. After the remaining segments of the arch rib are installed and the arch rib is closed, the contact surfaces of the pre-embedded positioning parts 30 and 80 of the arch seat are welded firmly.

[0044] In this embodiment, the surfaces of the fixing plate 31 and the support plate 811 that contact each other, and the surfaces of the positioning plate 33 and the arch seat angle steel 813 that contact each other, are the contact surfaces of the arch rib embedded positioning component 30 and the arch seat embedded positioning component 80. Furthermore, the weld between the arch rib embedded positioning component 30 and the arch seat embedded positioning component 80 is a fillet weld with a weld height of 18mm.

[0045] S5, concrete is poured at the sealing area of ​​the arch seat 60 and the bottom end of the arch foot segment 10 to achieve the connection between the arch seat 60 and the arch foot segment 10.

[0046] In this embodiment, concrete is poured into the bottom end of the arch foot segment 10 and the sealing area through the concrete injection hole 16, thereby connecting the arch foot segment 10 and the arch seat 60 together. Step S5 is prior art and will not be described in detail here for brevity.

[0047] The above-mentioned method for connecting the arch foot segment and the arch seat of the concrete arch rib involves setting an embedded steel plate 70 on the arch seat 60 and an embedded steel plate 20 on the arch foot segment 10. After the arch foot segment 10 is hoisted into place, a connecting steel plate 90 is used to fully weld the embedded steel plate 70 on the arch seat and the embedded steel plate 20 on the arch rib to complete the temporary fixation of the arch foot. Then, all the embedded steel bars 15 are welded. Since the hardness and strength of the steel plate are greater than those of the steel bars, its supporting force on the arch foot segment 10 is greater. Therefore, compared with the existing technology that requires welding most of the embedded steel bars 15 as a temporary fixation of the arch foot, the method of using the embedded steel plate 70 on the arch seat, the embedded steel plate 20 on the arch rib, and the connecting steel plate 90 as a temporary fixation of the arch foot can reduce the amount of welding work, thereby enabling the rapid positioning and connection of the arch foot segment 10 and shortening the hoisting and positioning time of the arch foot segment 10.

[0048] Meanwhile, by using the connecting steel plate 90 to fully weld the pre-embedded steel plate 70 of the arch seat and the pre-embedded steel plate of the arch rib to complete the temporary consolidation of the arch foot before welding all the pre-embedded steel bars 15, the arch foot segment 10 is supported by the connecting steel plate 90 during installation. This avoids the situation where the pre-embedded steel bars 15 are deformed due to stress and affect the positioning of the arch foot segment 10, thus ensuring the accuracy of the arch rib positioning connection and providing favorable conditions for the subsequent welding of the main reinforcement.

[0049] The above-mentioned method of connecting the arch foot segment of the concrete arch rib to the arch seat can improve the efficiency of hoisting and positioning the arch foot segment 10 by cooperating with the pre-embedded positioning part 80 of the arch seat and the pre-embedded positioning part 30 of the arch rib.

[0050] The above description is a detailed description of the preferred embodiments of the present invention. However, the embodiments are not intended to limit the scope of the patent application of the present invention. All equivalent changes or modifications made under the technical spirit of the present invention should fall within the patent scope covered by the present invention.

Claims

1. A method for connecting a concrete arch rib arch foot segment to an arch seat, wherein the arch rib is a steel box arch formed by sequentially connecting several arch boxes, characterized in that... Includes the following steps: S1, arch rib embedded steel plates and arch rib embedded positioning parts are fixed at intervals at the bottom of the arch foot segment of the arch rib, and arch seat embedded steel plates are fixed on the arch seat corresponding to the arch rib embedded steel plates. Arch seat embedded positioning parts are also fixed on the arch seat corresponding to the arch rib embedded positioning parts. The arch rib embedded steel plates are fixed to the arch box of the arch foot segment and to the top plate of the arch box. The arch rib embedded positioning parts are fixed to the bottom plate of the arch box of the arch foot segment. The arch rib embedded positioning parts are made of angle steel and include a fixing plate and a positioning plate. The fixing plate is fixed to the outer side of the bottom plate of the arch box, and the positioning plate is vertically connected to the bottom side of the fixing plate and located on the side of the fixing plate facing the top plate of the arch box; the arch seat pre-embedded positioning component includes a support plate, a connecting plate and an arch seat angle steel, all pre-embedded on the arch seat. One side of the connecting plate is vertically fixed to the top side of the support plate near the arch rib, and the arch seat angle steel is fixed to the bottom side of the support plate and located on the side of the support plate facing away from the connecting plate. The arch seat angle steel and the support plate together form a positioning groove. S2, the arch foot segment is hoisted to the arch seat using a hoisting device until the arch rib pre-embedded positioning component is slidably inserted into the positioning groove, thereby bringing the arch seat pre-embedded positioning component into contact with the arch rib pre-embedded positioning component. When the arch rib pre-embedded positioning component is inserted into the positioning groove, the fixing plate contacts the support plate, and the positioning plate contacts the arch seat angle steel. When the arch foot segment is under force, the arch rib pre-embedded positioning component can move along the positioning groove, thereby adjusting the position of the arch foot segment. After the arch foot segment is adjusted to the correct position, the arch rib pre-embedded steel plate and the arch seat pre-embedded steel plate are fully welded together using connecting steel plates to complete the temporary consolidation of the arch foot segment. S3, disconnect the arch foot segment from the hoisting device, and then weld the arch seat embedded steel bars on the arch seat to the arch rib embedded steel bars of the arch foot segment; S4. After the remaining segments of the arch rib are installed and the arch rib is closed, the contact surfaces of the pre-embedded positioning parts of the arch rib and the pre-embedded positioning parts of the arch seat are welded firmly. S5, concrete is poured at the sealing area of ​​the arch seat and the bottom end of the arch foot segment to achieve the connection between the arch seat and the arch foot segment.

2. The method for connecting the concrete arch rib arch foot segment and the arch seat as described in claim 1, characterized in that, The arch seat embedded steel plate and the arch rib embedded steel plate are parallel and spaced apart. Several connecting steel plates are provided, and the connecting steel plates are spaced apart along the length direction of the arch rib embedded steel plate. The two ends of each connecting steel plate are fully welded to the arch rib embedded steel plate and the arch seat embedded steel plate, respectively.

3. The method for connecting the concrete arch rib arch foot segment and the arch seat as described in claim 2, characterized in that, The connecting steel plate is an I-beam.

4. The method for connecting the concrete arch rib arch foot segment and the arch seat as described in claim 1, characterized in that, In step S4, the weld between the pre-embedded positioning component of the arch rib and the pre-embedded positioning component of the arch seat is a fillet weld with a weld height of 18mm.

5. The method for connecting the concrete arch rib arch foot segment and the arch seat as described in claim 1, characterized in that, The arch box of the arch foot segment is provided with at least one concrete injection hole. In step S5, concrete is poured into the bottom end of the arch foot segment and the sealing area through the concrete injection hole.

6. The method for connecting the concrete arch rib arch foot segment and the arch seat as described in claim 1, characterized in that, The pre-embedded steel bars of the arch seat are welded to the pre-embedded steel bars of the arch ribs on the top plate and web plate of the arch box of the arch foot segment.

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