Supporting device for steel-tower and steel-concrete combined section of cable-stayed bridge

Abstract

This utility model relates to the field of bridge construction technology and discloses a support device for the steel-concrete composite section of a cable-stayed bridge tower. The device includes: several embedded parts, with anchor rods anchored into the bridge deck at the lower end and horizontal support plates at the upper end; two or more vertical supports, including several columns, beams, and diagonal braces. The columns are vertically arranged, with their lower ends connected to the support plates and their upper ends equipped with horizontal mounting plates. The top and bottom ends of adjacent columns are connected to the beams, and several diagonal braces are arranged between adjacent columns; a transverse connecting rod, with both ends connected to two adjacent vertical supports; and a leveling bracket, with its upper end fixedly connected to the lower surface of the steel-concrete composite section and its lower end being a horizontal connecting plate opposite to the mounting plate. This support device for the steel-concrete composite section of a cable-stayed bridge tower can ensure the stability of the steel-concrete composite section during construction, guaranteeing construction accuracy.

Description

Technical Field

[0001] This utility model relates to the field of bridge construction technology, specifically to a support device for the steel-concrete composite section of a cable-stayed bridge tower. Background Technology

[0002] Bridge construction plays a vital role in spanning rivers, lakes, seas, and complex terrains. Traditional bridge structures are no longer sufficient to meet the demands of modern bridges for long spans, high load-bearing capacity, and long service life. The use of steel-concrete composite sections with prestressed concrete to connect steel towers and bridge decks is becoming increasingly common. This structure not only fully utilizes the material advantages of both steel and concrete but also demonstrates significant effectiveness in improving the overall performance of the bridge. However, when using post-tensioning to construct the steel-concrete composite section between the steel tower and the bridge deck, ensuring installation accuracy and stability during the pouring process are urgent problems that need to be solved.

[0003] Steel tower structures are mostly spatially irregularly shaped components, widely used due to their unique shapes and mechanical properties. However, the weight and volume of the steel-concrete composite section of a steel tower are usually large, especially when using the post-tensioning method. This section needs to be installed suspended in mid-air, and maintaining its tilt during installation, rebar tying, and concrete pouring presents a significant challenge to construction. If the tilt angle of the composite section becomes inaccurate, adjusting subsequent tower sections becomes extremely difficult, not only affecting construction progress but also potentially threatening project quality and safety. Utility Model Content

[0004] This utility model was developed to solve the aforementioned technical problems. Its purpose is to provide a support device for the steel-concrete composite section of a cable-stayed bridge steel tower, which can ensure that the steel-concrete composite section is in a stable state during construction and guarantee construction accuracy.

[0005] According to one embodiment of this utility model, a support device for the steel-concrete composite section of a cable-stayed bridge tower is provided, comprising: several embedded parts, the lower end of which is an anchor rod anchored into the bridge deck, and the upper end is a horizontal support plate; two or more vertical supports, including several columns, beams and diagonal braces, wherein the columns are vertically arranged, the lower end is connected to the support plate, and the upper end is provided with a horizontal mounting plate, the top and bottom ends of adjacent columns are connected to the beams, and several diagonal braces are provided between adjacent columns; a transverse connecting rod, both ends of which are connected to two adjacent vertical supports; and a leveling bracket, the upper end of which is fixedly connected to the lower surface of the steel-concrete composite section, and the lower end is a horizontal connecting plate opposite to the mounting plate.

[0006] In one embodiment, several of the columns are arranged along the extension direction of the steel-concrete composite section, with the height increasing from one side to the other.

[0007] In one embodiment, the upper beam is parallel to the steel-concrete composite section, and the lower beam is parallel to the bridge deck.

[0008] As one implementation, a support column is provided between the upper and lower adjacent beams.

[0009] In one embodiment, the support column has an outwardly extending connecting plate in the middle, one end of the diagonal brace is connected to the junction of the beam and the column, and the other end is connected to the connecting plate.

[0010] In one embodiment, the lower end of the column is bolted to the support plate.

[0011] As one implementation, the transverse connecting rods are respectively provided at the upper and lower parts of two horizontally adjacent columns.

[0012] In one embodiment, the docking plate is bolted to the mounting plate, the docking plate is provided with fastening bolts and a variable diameter guide pin, and the mounting plate is provided with positioning holes opposite to the variable diameter guide pin.

[0013] As one implementation, a plurality of pads are provided between the mounting plate and the docking plate.

[0014] As one implementation, diagonal supports are connected between adjacent vertical supports.

[0015] Based on the above description and practice, the support device for the steel-concrete composite section of the steel tower of the cable-stayed bridge of this utility model can be firmly connected to the bridge deck below the steel-concrete composite section through several embedded parts. Then, through vertical supports and horizontal connecting rods, a vertical and stable support system can be formed below the steel-concrete composite section. The leveling support can then be used to firmly connect the inclined steel-concrete composite section to the upper horizontal support system, forming a stable support for the steel-concrete composite section. This ensures that the steel-concrete composite section is in a stable state during construction and guarantees construction accuracy.

[0016] In addition, the support device makes the structural stiffness of the steel-concrete composite section more uniform, reduces stress concentration caused by sudden changes in stiffness, allows for more precise reinforcement design of the steel-concrete composite section, ensures accurate placement of reinforcing bars, and improves the overall crack resistance of concrete.

[0017] This support device allows for the initial installation of the steel structure of the steel-concrete composite section of the steel tower, followed by the binding of the reinforcing bars and the threading of prestressed steel strands, and finally the overall pouring of large-volume concrete. This effectively avoids construction joints caused by secondary pouring of large-volume concrete, and solves the problems of reinforcing bar construction and prestressed steel strand threading within the lower box of the anchor plate in the steel-concrete composite section caused by secondary pouring. Furthermore, the support device enables the on-site installation of the steel-concrete composite section in advance, effectively shortening the construction time. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural schematic diagram of a support device for the steel-concrete composite section of a cable-stayed bridge steel tower, according to one embodiment of the present invention.

[0019] Figure 2 This is a side view of a support device for the steel-concrete composite section of a cable-stayed bridge tower, as described in one embodiment of the present invention.

[0020] Figure 3 This is a partially enlarged structural schematic diagram of a support device for the steel-concrete composite section of a cable-stayed bridge tower, as described in one embodiment of the present invention.

[0021] Figure 4 This is a schematic diagram of the connection between the mounting plate and the docking plate in the support device for the steel-concrete composite section of the steel tower of a cable-stayed bridge, according to one embodiment of the present invention.

[0022] Figure 5 This is a plan view of the mounting plate in the support device for the steel-concrete composite section of a cable-stayed bridge steel tower, according to one embodiment of the present invention.

[0023] The attached figures are labeled as follows:

[0024] 1. Embedded parts; 2. Horizontal connecting rods; 3. Leveling brackets; 4. Columns; 5. Beams; 6. Diagonal braces; 7. Mounting plates; 8. Connecting plates; 9. Support columns; 10. Connecting plates; 11. Fastening bolts; 12. Variable diameter guide pins; 13. Positioning holes; 14. Diagonal brackets; 15. Steel-concrete composite sections. Detailed Implementation

[0025] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, exemplary embodiments can be implemented in many forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that this disclosure will be more comprehensive and complete, and will fully convey the concept of exemplary embodiments to those skilled in the art. The described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

[0026] Furthermore, the accompanying drawings are merely illustrative of this disclosure and are not necessarily drawn to scale. The same reference numerals in the drawings denote the same or similar parts, and therefore repeated descriptions of them will be omitted. It should be noted that in this disclosure, the terms "comprising," "configured with," and "set in" are used to indicate an open-ended inclusion, meaning that additional elements / components / etc. may exist besides those listed; the terms "first," "second," etc., are used only as labels and are not intended to limit the number or order of objects; the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and 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, and therefore should not be construed as a limitation of this utility model.

[0027] Unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0028] According to one embodiment of this utility model, a support device for the steel-concrete composite section of a cable-stayed bridge tower is provided. Please refer to [reference needed]. Figures 1 to 5 The support device for the steel-concrete composite section of the steel tower of the cable-stayed bridge includes several embedded parts 1, two or more vertical supports, horizontal connecting rods 2 and leveling supports 3.

[0029] The lower ends of several embedded parts 1 are anchor rods anchored into the bridge deck, and the upper ends are horizontal support plates. The anchor rods are firmly anchored in the concrete structure of the bridge deck, ensuring that the entire support device has a stable foundation. The support plates are set horizontally, providing an installation foundation for the vertical supports, enabling the entire support system to stably bear the weight of the steel-concrete composite section 15.

[0030] The number of vertical supports may exceed two, and can be appropriately increased according to the width of the steel-concrete composite section 15 to be supported. The vertical supports include several columns 4, beams 5, and diagonal braces 6. The columns 4 are vertically installed, with their lower ends connected to a support plate and their upper ends equipped with horizontal mounting plates 7. The lower ends of the columns 4 are bolted to the support plate, a connection method that facilitates installation and adjustment while ensuring a secure connection. Beams 5 connect the top and bottom ends of adjacent columns 4, enhancing the overall stability of the support system. Several diagonal braces 6 are installed between adjacent columns 4 to improve the lateral force resistance of the entire support device and prevent deformation or tilting when bearing the weight of the steel-concrete composite section 15.

[0031] The two ends of the transverse link 2 are connected to two adjacent vertical supports, which enhances the transverse stability of the entire support device.

[0032] The upper end of the leveling bracket 3 is fixedly connected to the lower surface of the steel-concrete composite section 15, and the lower end is a horizontal mating plate 8 opposite to the mounting plate 7. During the fabrication of the steel structure of the steel-concrete composite section 15, the upper end of the leveling bracket 3 is directly welded to it, forming an integrated structure. This structure not only creates a contact plane opposite to the mounting plate 7 on the lower surface of the steel-concrete composite section 15 but also provides high connection stability. During support operations, the leveling bracket 3 will not separate from the steel-concrete composite section 15.

[0033] This support device for the steel-concrete composite section of the cable-stayed bridge tower can be firmly connected to the bridge deck below the steel-concrete composite section 15 through several embedded parts 1. Then, through the vertical brackets and horizontal connecting rods 2, a vertical and stable support system can be formed below the steel-concrete composite section 15. The leveling brackets 3 can then firmly connect the inclined steel-concrete composite section 15 to the upper horizontal support system, forming a stable support for the steel-concrete composite section 15. This ensures that the steel-concrete composite section 15 is in a stable state during construction and guarantees construction accuracy.

[0034] As one implementation method, several columns 4 are arranged along the extension direction of the steel-concrete composite section 15, with the height increasing from one side to the other, forming a support structure that adapts to the bottom surface of the steel-concrete composite section 15, which can provide a stable and balanced support for the steel-concrete composite section 15.

[0035] In one implementation, the upper beam 5 is parallel to the steel-concrete composite section 15, and the lower beam 5 is parallel to the bridge deck. This arrangement allows the support device to better adapt to the shape of the steel-concrete composite section 15.

[0036] Furthermore, support columns 9 are provided between adjacent beams 5, which further enhances the stability of the entire support structure and prevents significant deformation of adjacent beams 5 during use.

[0037] Furthermore, the middle of the support column 9 is provided with an outwardly extending connecting plate 10. One end of the diagonal brace 6 is connected to the junction of the beam 5 and the column 4, and the other end is connected to the connecting plate 10. This arrangement of the diagonal brace 6 forms a triangular structure, which effectively improves the lateral force resistance of the entire support device and prevents the support device from deforming or tilting when bearing the weight of the steel-concrete composite section 15.

[0038] As one implementation method, transverse connecting rods 2 are provided at the upper and lower parts of two horizontally adjacent columns 4, forming a complete spatial frame structure, so that the entire support device can have sufficient rigidity and stability in all directions.

[0039] In one embodiment, the mating plate 8 is bolted to the mounting plate 7. The mating plate 8 is equipped with fastening bolts 11 and a variable-diameter guide pin 12. The fastening bolts 11 are used to securely connect the mating plate 8 and the mounting plate 7, while the variable-diameter guide pin 12 ensures accurate alignment of the mating plate 8 and the mounting plate 7 during the connection process. Figure 4 and Figure 5 As shown, bolt holes and positioning holes 13 are formed on the mounting plate 7, with the positioning holes 13 being positioned opposite to the variable diameter guide pin 12. When connecting the mating plate 8 and the mounting plate 7 together, first insert the variable diameter guide pin 12 on the mating plate 8 into the positioning hole 13 to align the positions of the mating plate 8 and the mounting plate 7, and then securely connect the two together by tightening the bolts 11.

[0040] Furthermore, several pads are provided between the mounting plate 7 and the docking plate 8. By adjusting the number and thickness of the pads, the support height and level of the steel-concrete composite section 15 can be precisely adjusted to ensure the accuracy of the installation position of the steel-concrete composite section 15.

[0041] As one implementation, an inclined support 14 is connected between adjacent vertical supports. The inclined support 14 can be a cross-shaped diagonal bar structure, with its ends bolted or welded to two horizontally adjacent columns 4. This can further improve the stability of the connection between the two vertical supports and ensure that the steel-concrete composite section 15 can be firmly supported.

[0042] When using this support device to construct the steel-concrete composite section of the steel tower of a cable-stayed bridge, follow these steps:

[0043] Step 1: Measure and locate the embedded part 1 on the bridge deck according to the design drawings, then install the embedded part 1 on the bridge deck, and then pour the concrete of the bridge deck to firmly bond the embedded part 1 with the bridge deck.

[0044] Step 2: Clean the concrete residue on embedded part 1, remeasure and position it on embedded part 1, mark the center line for the installation of column 4 in the vertical support, install column 4, re-measure the verticality, and then bolt it to embedded part 1. In other embodiments, the two can also be directly welded together. Install beam 5, support column 9, diagonal brace 6, and connecting plate 10 on column 4 according to the design drawings. Weld or bolt adjacent structures together to form a stable vertical support. Install transverse connecting rod 2 and diagonal support 14 between adjacent vertical supports.

[0045] Step 3: Standardize and remeasure the top elevation of column 4. By replacing the shims of different thicknesses at the top of column 4, the shape of its upper support contact surface can be quickly adjusted, and the top elevation of column 4 can be corrected to meet the design requirements.

[0046] Step 4: Before leaving the factory, the steel-concrete composite section 15 is equipped with the leveling bracket 3, for example, the upper end of the leveling bracket 3 is welded to the steel-concrete composite section 15.

[0047] Step 5: Install the steel-concrete composite section 15 of the steel tower. Connect each leveling bracket 3 to the mounting plate 7 at the upper end of the column 4 by connecting the variable diameter guide pin 12. Install the steel-concrete composite section 15 in place. Re-measure the spatial coordinates of the upper opening of the steel-concrete composite section 15 to ensure the accuracy of the spatial positioning posture. Then, connect and fix the leveling bracket 3 to the mounting plate 7 by tightening bolts 11.

[0048] Step 6: Tie the reinforcing bars in the steel-concrete composite section 15 and install the prestressed steel strands. The steel strands need to pass through the anchor plates of the steel-concrete composite section 15 and be temporarily fixed in advance; erect the steel formwork and pour the concrete; remove the formwork, and after the concrete strength reaches the standard, perform prestressing tensioning to complete the construction of the steel-concrete composite section 15. The support device can be removed as needed in the future.

[0049] Using the aforementioned support device during the construction of the steel-concrete composite section 15 can make the structural stiffness of the steel-concrete composite section 15 more uniform, reduce stress concentration caused by sudden changes in stiffness, allow for more precise reinforcement design of the steel-concrete composite section 15, ensure accurate reinforcement placement, and improve the overall crack resistance of the concrete.

[0050] This support device allows for the initial installation of the steel structure of the steel-concrete composite section 15, followed by the binding of the reinforcing bars and the threading of prestressed steel strands, and finally the overall pouring of large-volume concrete. This effectively avoids construction joints caused by secondary pouring of large-volume concrete, and solves the problems associated with reinforcing bar construction and prestressed steel strand threading within the lower box of the anchor plate of the steel-concrete composite section 15 caused by secondary pouring. Furthermore, the support device enables the early installation of the steel-concrete composite section 15 on-site, effectively shortening the construction time.

[0051] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A support device for the steel-concrete composite section of a cable-stayed bridge tower, characterized in that, include: Several embedded parts, with anchor rods at the lower end anchored into the bridge deck and horizontal support plates at the upper end; Two or more vertical supports include several columns, beams and diagonal braces. The columns are vertically arranged, with their lower ends connected to the support plate and their upper ends provided with horizontal mounting plates. The top and bottom ends of adjacent columns are connected to the beams, and several diagonal braces are provided between adjacent columns. A horizontal connecting rod is connected at both ends to two adjacent vertical supports; The leveling bracket is fixedly connected at the upper end to the lower surface of the steel-concrete composite section, and at the lower end is a horizontal mating plate opposite to the mounting plate.

2. The support device for the steel-concrete composite section of a cable-stayed bridge tower as described in claim 1, characterized in that, Several of the columns are arranged along the extension direction of the steel-concrete composite section, with the height increasing from one side to the other.

3. The support device for the steel-concrete composite section of a cable-stayed bridge tower as described in claim 2, characterized in that, The upper beam is parallel to the steel-concrete composite section, and the lower beam is parallel to the bridge deck.

4. The support device for the steel-concrete composite section of a cable-stayed bridge tower as described in claim 3, characterized in that, Support columns are provided between the upper and lower adjacent beams.

5. The support device for the steel-concrete composite section of a cable-stayed bridge tower as described in claim 4, characterized in that, The support column has an outwardly extending connecting plate in the middle. One end of the diagonal brace is connected to the junction of the beam and the column, and the other end is connected to the connecting plate.

6. The support device for the steel-concrete composite section of a cable-stayed bridge tower as described in claim 1, characterized in that, The lower end of the column is bolted to the support plate.

7. The support device for the steel-concrete composite section of a cable-stayed bridge tower as described in claim 1, characterized in that, The transverse connecting rods are respectively provided at the upper and lower parts of two horizontally adjacent columns.

8. The support device for the steel-concrete composite section of a cable-stayed bridge tower as described in claim 1, characterized in that, The docking plate is bolted to the mounting plate. The docking plate is provided with fastening bolts and a variable diameter guide pin. The mounting plate is provided with positioning holes opposite to the variable diameter guide pin.

9. The support device for the steel-concrete composite section of a cable-stayed bridge tower as described in claim 1, characterized in that, Several pads are provided between the mounting plate and the docking plate.

10. The support device for the steel-concrete composite section of a cable-stayed bridge tower as described in claim 1, characterized in that, An inclined support is connected between adjacent vertical supports.

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