Structure capable of easily connecting concrete filled steel tube arch rib sections and internally pouring concrete
By combining a limiting steel plate, a connecting steel plate, and a ring-shaped steel plate, the construction difficulty of connecting steel-concrete arch rib segments and the problem of smooth concrete pouring were solved, achieving rapid connection and efficient pouring.
Patent Information
- Application Number
- CN202520459816.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-17
- Publication Date
- 2026-02-06
- Estimated Expiration
- 2035-03-17
AI Technical Summary
The existing steel-concrete composite arch rib segment connection method has problems such as difficult tightening, large area occupied inside the pipe, and impact on the smoothness of concrete pouring, leading to quality problems such as pipe blockage and voids.
The system employs a combination structure of limiting steel plates, connecting steel plates, and ring steel plates. It achieves rapid connection between segments through bolt connections, and utilizes the steel plates for limiting and bolt connections to ensure convenient construction and smooth concrete pouring.
This technology enables rapid connection of arch rib segments, reduces construction difficulty, improves the smoothness of concrete pouring, and significantly reduces the occurrence of quality problems such as pipe blockage and voids.
Smart Images
Figure CN223880184U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the technical field of steel pipe concrete arch bridge, more specifically, it is a structure that is easy to connect steel pipe concrete arch rib section and pour concrete. BACKGROUND
[0002] Steel pipe concrete structure is a special combination structure form, which fills concrete in the steel pipe, limits the expansion of concrete by the radial constraint of the steel pipe, and then makes the concrete in a three-way compression stress state, so as to finally realize the purpose of significantly improving the compressive strength of concrete. Steel pipe concrete arch bridge uses this structure as the arch rib, which has the advantages of large bearing capacity and convenient construction, and has been widely used in bridge infrastructure construction in China. The bridge type arrangement is shown in Figure 14 .
[0003] During the construction of the steel pipe concrete arch bridge, the steel pipe arch rib is first processed into assembled segments in the factory, then the segments are transported to the construction site to assemble the steel pipe arch rib as a whole, and finally the concrete is poured into the steel pipe to form the steel pipe concrete arch rib. The assembly method is shown in Figure 15 . At present, the inner flange plate is mostly used to connect the steel pipe arch rib assembly segments, and its working principle is as follows: the flange plates pre-installed at the ends of each segment are connected by bolts to form temporary connections, and then ring-shaped steel plates are welded on the outside to seal the steel pipe to form permanent connections. The structure is shown in the attached Figure 16 and 17 . However, this inner flange plate connection method has certain limitations: first, because the flange bolt axis is parallel to the arch rib axis, the space for tightening is limited, and the bolt tightening is difficult; second, the inner flange plate has a large area, which occupies most of the cross-sectional area of the pipe, which will seriously affect the smoothness of the later concrete pouring in the pipe, and thus cause quality problems such as pipe blockage and void.
[0004] Therefore, it is necessary to develop a structure that is easy to connect steel pipe concrete arch rib sections and pour concrete in the pipe, which can quickly and conveniently realize connection and ensure smooth pouring of concrete in the pipe to avoid pipe blockage. INVENTION CONTENTS
[0005] The utility model aims at overcoming the defects in the background art, and provides a structure that is easy to connect steel pipe concrete arch rib sections and pour concrete in the pipe.
[0006] In order to achieve the above object, the technical scheme of the utility model is: the structure easy to connect the concrete-filled steel tube arch rib intersegment and pour concrete, characterized in that: including connecting structure, installed segment and to be installed segment, the connecting structure includes spacing steel sheet, connecting steel sheet and annular steel sheet, one end of spacing steel sheet is welded in the inner wall of installed segment, and the other end extends installed segment, one end of connecting steel sheet is welded in the inner wall of to be installed segment, and the other end extends to be installed segment and is located in spacing steel sheet, spacing steel sheet and connecting steel sheet are connected through connecting bolt, and annular steel sheet is welded between installed segment and to be installed segment.
[0007] In the above technical scheme, the connecting structure has multiple groups.
[0008] In the above technical scheme, the spacing steel sheet includes two steel sheets arranged at intervals, and one end of the two steel sheets in installed segment is welded with the bottom support steel sheet, the bottom support steel sheet is welded with the inner wall of installed segment, and the two steel sheets and the bottom support steel sheet form a rectangular notch, and the connecting steel sheet is inserted into the rectangular notch.
[0009] In the above technical scheme, the spacing steel sheet extends one end of installed segment and the connecting steel sheet extends one end of to be installed segment, and both ends are provided with matching bolt holes.
[0010] In the above technical scheme, the spacing between the two steel sheets is consistent with the thickness of the connecting steel sheet.
[0011] In the above technical scheme, the annular steel sheet includes two half annular steel sheets, and the two half annular steel sheets weld and close the gap between installed segment and to be installed segment.
[0012] Compared with the prior art, the utility model has the following advantages:
[0013] 1) the utility model utilizes the characteristics of steel sheet spacing and bolt connection to realize the rapid connection between segments.
[0014] 2) the utility model is convenient for bolt installation when the bolt is twisted to face the worker.
[0015] 3) the utility model greatly reduces the internal flange structure of the steel pipe, greatly increases the smoothness of the pipe concrete pouring, and can significantly reduce the possibility of pipe blockage, void and other quality problems. DRAWINGS
[0016] Figure 1 It is the structure schematic view of the utility model.
[0017] Figure 2 It is the side view of the utility model.
[0018] Figure 3 Fig. 4 is a plan view of the limiting steel plate and the connecting steel plate.
[0019] Figure 4 Fig. 5 is a side view of the limiting steel plate. Figure 3
[0020] Figure 5 Fig. 6 is a side view of the connecting steel plate. Figure 3
[0021] Figure 6 Fig. 7 is a structural schematic view of the connecting steel plate.
[0022] Figure 7 Fig. 8 is a side view of the limiting steel plate. Figure 6
[0023] Figure 8 Fig. 9 is a structural schematic view of the limiting steel plate.
[0024] Figure 9 Fig. 10 is a side view of the limiting steel plate. Figure 8
[0025] Fig. 11 is a schematic view of the centering state before the assembly of the installed segment and the segment to be installed. Figure 10
[0026] Fig. 12 is a schematic view of the state when the connecting steel plate 120 is inserted into the rectangular slot to form a temporary limit. Figure 11
[0027] Fig. 13 is a schematic view of the state when the connecting bolt 140 bolts the limiting steel plate and the connecting steel plate to form a temporary connection of the segment. Figure 12
[0028] Fig. 14 is a schematic view of the state when a permanent connection of the segment is formed. Figure 13
[0029] Fig. 15 is a schematic view of the concrete-filled steel tube arch bridge. Figure 14
[0030] Fig. 16 is an enlarged view of A in Fig. 15. Figure 15 Figure 14 Fig. 17 is a structural schematic view of the prior art.
[0031] Figure 16 Fig. 18 is a side view of the prior art.
[0032] Figure 17 Figure 16
[0033] In the drawings: 100 - connecting structure, 110 - limiting steel plate, 111 - steel plate, 112 - bottom support steel plate, 120 - connecting steel plate, 130 - ring-shaped steel plate, 131 - semi-ring-shaped steel plate, 140 - connecting bolt, 150 - bolt hole, 200 - installed segment, 300 - segment to be installed. DETAILED DESCRIPTION
[0034] The following detailed description, in conjunction with the accompanying drawings, illustrates the implementation of this utility model. However, these descriptions do not constitute a limitation of the present utility model and are merely illustrative. Furthermore, the advantages of this utility model will become clearer and easier to understand through this description.
[0035] As can be seen from the attached diagram: Figures 1-5 As shown, a structure for easy connection and internal concrete pouring of steel-concrete composite arch ribs is characterized by: a connecting structure 100, an installed segment 200, and a segment to be installed 300. The connecting structure 100 includes a limiting steel plate 110, a connecting steel plate 120, and an annular steel plate 130. One end of the limiting steel plate 110 is welded to the inner wall of the installed segment 200, and the other end extends out of the installed segment 200. One end of the connecting steel plate 120 is welded to the inner wall of the segment to be installed 300, and the other end extends out of the segment to be installed 300 and is located within the limiting steel plate 110. The limiting steel plate 110 and the connecting steel plate 120 are connected by connecting bolts 140; the annular steel plate 130 is welded between the installed segment 200 and the segment 300 to be installed; the connecting bolts 140 bolt the limiting steel plate 110 and the connecting steel plate 120 together, thereby forming a reliable temporary connection between the segment 300 to be installed and the installed segment 200; the annular steel plate 130 welds and seals the gap between the segment 300 to be installed and the installed segment 200, and participates in the internal force transmission between the segment 300 to be installed and the installed segment 200, forming a reliable permanent connection.
[0036] The connection structure 100 has multiple sets.
[0037] The limiting steel plate 110 includes two spaced steel plates 111. One end of each steel plate 111 located within the installed segment 200 is welded to the bottom support steel plate 112. The bottom support steel plate 112 is welded to the inner wall of the installed segment 200. The two steel plates 111 and the bottom support steel plate 112 form a rectangular slot. The connecting steel plate 120 is inserted into the rectangular slot. The bottom support steel plate 112 provides lateral and vertical limiting for the connecting steel plate 120, preventing the segment 300 to be installed from shaking or sliding during installation.
[0038] Both the limiting steel plate 110 extending from the installed segment 200 and the connecting steel plate 120 extending from the segment to be installed 300 have matching bolt holes 150.
[0039] The spacing between the two steel plates 111 is the same as the thickness of the connecting steel plate 120.
[0040] The annular steel plate 130 includes two semi-annular steel plates 131, which weld and seal the gap between the installed segment 200 and the segment 300 to be installed.
[0041] In actual use, as shown in Figures 6-7 The connecting steel plate 120 is in the form of a rectangular steel plate with bolt holes 150, is welded inside the steel pipe of the to-be-installed segment 300, and is bolted to the limiting steel plate 110 on the installed segment 200 through the connecting bolts 140 to form a temporary connection when the segments are assembled.
[0042] As shown in Figures 8-9 The limiting steel plate 110 is in the form of two rectangular steel plates with bolt holes 150, is welded inside the steel pipe of the installed segment 200, the transverse distance between the two steel plates 111 is consistent with the thickness of the connecting steel plate 120, the connecting steel plate 120 is inserted into the gap between the two steel plates 111 to form a limit when the segments are assembled, so as to avoid the to-be-installed segment 300 from shaking, and then the connecting steel plate 120 is bolted to the limiting steel plate 110 through the connecting bolts 140, so as to form a temporary connection between the to-be-installed segment 300 and the installed segment 200.
[0043] The bottom supporting steel plate 112 is in the form of a rectangular steel plate, and the two steel plates 111 and the bottom supporting steel plate 112 form a rectangular slot, the connecting steel plate 120 is inserted into the slot during installation, the bottom of the connecting steel plate 120 is supported on the bottom supporting steel plate 112 to form a bottom support, and the to-be-installed segment 300 can be prevented from sliding downward.
[0044] The connecting bolts 140 are in the form of friction type high-strength bolts, the connecting steel plate 120 is bolted to the limiting steel plate 110 through the connecting bolts 140 to form a temporary connection structure of the segments.
[0045] The installation method of the utility model comprises the following steps:
[0046] When the arch rib segment is installed, the to-be-installed segment 300 is first hoisted by a cable crane, is transported to the air, and is centered with the installed segment 200, as shown in Figure 10 Then the to-be-installed segment 300 is slowly lowered, the connecting steel plate 120 is inserted into the rectangular slot formed by the limiting steel plate 110 and the bottom supporting steel plate 112 of the installed segment 200 to form a temporary limit, as shown in Figure 11 Then the connecting bolts 140 are installed in the bolt holes 150 of the connecting steel plate 120 and the limiting steel plate 110 to bolt the two to form a temporary connection of the segments, as shown in Figure 12 Finally, the annular steel plate 130 is welded between the gap between the installed segment 200 and the to-be-installed segment 300 to close the steel pipe and form a permanent connection of the segments, as shown in Figure 13 The segment installation is completed.
[0047] The utility model discloses a design method, including the following steps: first through finite element calculation software, the most unfavorable axial force N and the bending moment M of each section joint in the whole installation process are calculated, and the internal force is used as the steel pipe joint internal force design value, and the structure design and the strength check calculation of joint are carried out. In order to guarantee the reliability of section connection, according to the steel pipe diameter and internal force size, the quantity of connecting structure 100 can take 4 groups, 6 groups or 8 groups;Design content includes: 1) weld length design, the weld length of connecting structure 100 is controlled by the weld between connecting steel plate 120 and steel pipe, and the weld design length is obtained according to internal force calculation, and the weld shear bearing capacity is guaranteed to be not less than the shear design value;2) steel plate gross section strength calculation, connecting steel plate 120 is provided with bolt hole 150, and the gross section area is lower than nominal area, therefore, the steel plate design is controlled by connecting steel plate 120 gross section, and the thickness of connecting steel plate 120 is obtained according to internal force calculation, and the gross section bearing capacity is guaranteed to be not less than the internal force design value;3) connecting bolt 140 calculation, according to internal force, the required quantity and arrangement spacing of high-strength bolt are calculated, and the bolt shear bearing capacity is guaranteed to be not less than the shear design value;Through the above steps, the quantity, size and model of connecting steel plate 120, limiting steel plate 110, bottom support steel plate 112 and connecting bolt 140 are designed, and the joint connection strength is guaranteed to be not less than the internal force design value.
[0048] Other unexplained parts belong to the prior art.
Claims
1. A structure that facilitates the connection between sections of a steel-concrete composite arch rib and the internal grouting of concrete, characterized by: The utility model relates to a connecting structure (100), installed section (200) and section (300) to be installed, the connecting structure (100) includes spacing steel sheet (110), connecting steel sheet (120) and ring steel sheet (130), one end of spacing steel sheet (110) is welded in installed section (200) inner wall, and the other end projects installed section (200), one end of connecting steel sheet (120) is welded in section (300) inner wall to be installed, and the other end projects section (300) to be installed and is located in spacing steel sheet (110) inside, spacing steel sheet (110) and connecting steel sheet (120) are connected through connecting bolt (140), and ring steel sheet (130) is welded between installed section (200) and section (300) to be installed.
2. The structure of easy-to-use intersegmental connection of concrete-filled steel tube arch ribs and concrete pouring according to claim 1, characterized in that: The connecting structure (100) has multiple groups.
3. The structure of easy-to-use inter-story connection of concrete-filled steel tube arch ribs and concrete pouring according to claim 1, characterized in that: Spacing steel sheet (110) includes two steel sheets (111) arranged at intervals, and one end of the two steel sheets (111) in installed section (200) is welded with bottom support steel sheet (112), the bottom support steel sheet (112) is welded with installed section (200) inner wall, and the two steel sheets (111) and bottom support steel sheet (112) form rectangular notches, and connecting steel sheet (120) is inserted into the rectangular notches.
4. The structure of easy-to-use inter-story connection of concrete-filled steel tube arch ribs and concrete pouring according to claim 3, characterized in that: The end of spacing steel sheet (110) projecting installed section (200) and the end of connecting steel sheet (120) projecting section (300) to be installed are both provided with matching bolt holes (150).
5. The structure of easy-to-use inter-story connection of concrete-filled steel tube arch ribs and concrete pouring according to claim 3, characterized in that: The spacing between the two steel sheets (111) is consistent with the thickness of connecting steel sheet (120).
6. The structure of easy-to-use inter-segmental connection of concrete-filled steel tube arch ribs and concrete pouring according to claim 1, characterized in that: The ring steel sheet (130) includes two half-ring steel sheets (131), and the two half-ring steel sheets (131) weld and close the gap between installed section (200) and section (300) to be installed.