Pedestrian bridge tensioning device and installation method

Abstract

The application discloses a kind of pedestrian bridge tensile device and installation method, comprising: pier and the beam of being set on pier;Vertical steel plate is set in the bottom of the beam downward;Vertical baffle is set in the lower end of the vertical steel plate;Corresponding vertical steel plate above vertical baffle is set with tensile structural member on the side of the pier.The application can effectively resist the tensile force generated at the support point of pedestrian bridge, and has no influence on the longitudinal expansion of bridge and the stress state of support.At the same time, the application has simple structure, clear stress, convenient construction, low cost, and is suitable for popularization and application in the field of pedestrian bridge structure.

Description

Technical Field

[0001] This invention belongs to the field of bridge-related technology, and in particular relates to a tensile-resistant device for pedestrian bridges and its installation method. Background Technology

[0002] In recent years, with the improvement of my country's economic level and the rapid advancement of urbanization, bridge construction is no longer limited to functional needs; aesthetic requirements are also constantly increasing. Many pedestrian bridges, due to space constraints, have significantly different continuous beam spans or adopt curved lines to pursue aesthetic appeal, resulting in insufficient support reaction forces or even voids at the bridge supports, affecting the structural safety of the bridge. Therefore, appropriate measures must be taken to address the insufficient support reaction forces or voids at the bridge supports to ensure structural safety. Summary of the Invention

[0003] To address the above problems, this invention provides a tensile-resistant device and installation method for pedestrian bridges, which can effectively resist the tensile force generated at the supports of pedestrian bridges, while having no impact on the longitudinal expansion and contraction of the bridge or the stress state of the supports. It has a simple structure, clearly defined structural stress, convenient construction, and low cost, making it suitable for widespread application in the field of pedestrian bridge structures.

[0004] To achieve the above objectives, the pedestrian bridge tensile device of the present invention includes: Piers and beams mounted on the piers; A vertical steel plate is provided downwards at the bottom of the beam; A vertical baffle is provided at the lower end of the vertical steel plate; Tensile structural members are provided on the vertical steel plate above the vertical baffle on one side of the pier.

[0005] Furthermore, the tensile structural member consists of two parallel transverse steel plates set on one side of the pier, corresponding to the vertical steel plate. The lower edge of the transverse steel plates is located above the upper surface of the vertical baffle, and the vertical steel plate is set between the two transverse steel plates.

[0006] Furthermore, a longitudinal limiting steel plate is provided on one side of the two transverse steel plates far from the pier.

[0007] Furthermore, the pier is a concrete pier, and the concrete pier contains embedded reinforcing bars and embedded steel plates corresponding to the tensile structural members.

[0008] Furthermore, a leveling steel plate is provided between the pre-embedded steel plate of the pier and the tensile structural member.

[0009] Furthermore, the pier is a steel structure pier, and a leveling steel plate is welded to one side of the steel structure pier corresponding to the tensile structural member.

[0010] Furthermore, a beam bottom leveling steel plate is provided between the beam and the vertical steel plate.

[0011] To achieve the above objectives, the present invention provides a method for installing a tensile-resistant device for pedestrian bridges, comprising the following steps: Step 1: Determine the location of the tensile device; Step 2: Embed steel plates for the piers during the pier pouring process; Step 3: The leveling steel plate at the bottom of the beam, the vertical steel plate, and the vertical baffle are welded to the main beam as a whole in the factory; Step 4: Weld the transverse steel plate and the longitudinal limiting steel plate into a single structure; Step 5: Accurately locate the pier leveling steel plate on site, weld it onto the pre-embedded steel plate of the pier, and then weld the integrated structure of the transverse steel plate onto the pier leveling steel plate.

[0012] Furthermore, in step 3 of the installation process, if the plane of the main beam at the pier location is located on a curve, the specific location of the beam bottom limiting device needs to be determined according to the pier location to ensure that the transverse steel plate is along the longitudinal direction of the bridge and parallel to the vertical steel plate.

[0013] This invention provides a tensile-resistant device for pedestrian bridges that withstands the vertical pull-out force generated when the main beam becomes detached. When the bridge experiences upward pull-out force due to variable forces, the main beam tilts upward, causing the leveling steel plate at the bottom of the beam and the vertical steel plate to displace upward. The transverse steel plate restricts the upward movement of the vertical baffle, thereby achieving the effect of tensile resistance for the bridge. The advantage of this device is that it only resists tension; when the main beam experiences pressure, the tensile-resistant device does not participate in the force-bearing process, ensuring that the supports bear pressure independently and not affecting the stress pattern of the main beam. Attached Figure Description

[0014] Figure 1 This is an elevation view (pier cap beam) of the present invention. Figure 2 This is an elevation view (circular bridge pier) of the present invention. Figure 3 This is a cross-sectional view of the invention (pier cap beam); Figure 4 This is a cross-sectional view (circular bridge pier) of the present invention. Figure 5 This is a three-dimensional structural diagram of the present invention (pier cap beam); Figure 6 This is a three-dimensional structural diagram of the present invention (circular bridge pier). Figure 7 The present invention is an integral structure formed by welding the transverse steel plate 2 and the longitudinal limiting steel plate 3. Figure 8 The beam bottom leveling steel plate 5, vertical steel plate 1, and vertical baffle 4 are the components of this invention.

[0015] In the diagram, 1—vertical steel plate, 2—horizontal steel plate, 3—longitudinal limiting steel plate, 4—vertical baffle, 5—beam bottom leveling steel plate, 6—main beam stiffening steel plate or transverse diaphragm, 7—pier leveling steel plate, 8—pier embedded steel plate, 9—pier embedded reinforcing bar. Detailed Implementation

[0016] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0017] In the description of this invention, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0018] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0019] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0020] This invention includes: a vertical steel plate, a horizontal steel plate, a longitudinal limiting steel plate, a vertical baffle, a beam bottom leveling steel plate, a main beam stiffening steel plate or a transverse diaphragm, a pier leveling steel plate, a pier embedded steel plate, and pier embedded reinforcing bars. The pier cap beam or the side of the pier is provided with the pier embedded steel plate and the pier leveling steel plate. Two parallel horizontal steel plates are connected to the pier leveling steel plate, and the other side of the two parallel horizontal steel plates is connected together by the longitudinal limiting steel plate. The main beam bottom leveling steel plate is provided at the bottom, and the beam bottom leveling steel plate is connected to the vertical steel plate. The other side of the vertical steel plate is connected to the vertical baffle.

[0021] In this invention, the distance between the vertical steel plate and the horizontal steel plates on both sides, as well as the distance between the vertical steel plate and the longitudinal limiting steel plate, is determined according to the required longitudinal and transverse displacements of the bridge. This ensures that the longitudinal and transverse deformations caused by normal temperature changes of the bridge will not cause jamming and affect the stress on the bridge.

[0022] Example 1 This embodiment provides a tensile-resistant device for pedestrian bridges.

[0023] See appendix Figure 1-8 The device of the present invention mainly includes: a vertical steel plate 1, a horizontal steel plate 2, a longitudinal limiting steel plate 3, a vertical baffle 4, a beam bottom leveling steel plate 5, a main beam stiffening steel plate or a horizontal diaphragm 6, a pier leveling steel plate 7, a pier embedded steel plate 8, and a pier embedded reinforcing bar 9.

[0024] Determine the location of the tensile device. It is set on the extended line of the support centerline on the longitudinal side of the pier, with the position of the beam bottom leveling steel plate 5 corresponding to the position of the transverse steel plate 2 at the pier, so that it can form a tensile device together with the pier embedded steel plate 8 and the pier leveling steel plate 7.

[0025] During the pouring of the pier, the pre-embedded reinforcing bars 9 and the pre-embedded steel plates 8 should be properly installed. Alternatively, if the pier is a steel structure, the leveling steel plate 7 can be directly welded to the structural steel plate of the pier, and a stiffening plate can be installed at this location. The leveling steel plate 5 at the bottom of the beam, the vertical steel plate 1, and the vertical baffle 4 are welded together with the main beam in the factory. Alternatively, if the main beam is a concrete main beam, a steel plate is pre-embedded at the bottom of the main beam, and the leveling steel plate 5 is directly welded to the pre-embedded steel plate at the bottom of the beam.

[0026] The transverse steel plate 2 and the longitudinal limiting steel plate 3 are welded into a single structure, see Figure 7 .

[0027] After the assembly of the equipment and the completion of all ancillary facilities such as the bridge deck, paving, and railings, and the removal of construction loads from the bridge, the pier leveling steel plate 7 is accurately positioned on site and welded to the pier embedded steel plate 8. Then, the transverse steel plate integral structure is welded to the pier leveling steel plate 7. During welding, the vertical baffle 4 is made to be tightly attached to the transverse steel plate 2.

[0028] Example 2 This embodiment provides a method for installing a tensile-resistant device for pedestrian bridges, specifically including the following steps: Step 1: Determine the location of the tensile strength device. It is installed on the extended line of the support centerline on the longitudinal side of the pier, with the position of the beam bottom leveling steel plate corresponding to the position of the transverse steel plate at the pier, so that it, together with the pier-embedded steel plate and the pier-leveling steel plate, forms the tensile strength device.

[0029] Step 2: During the pier pouring, ensure the pre-embedded reinforcing bars and steel plates of the pier are properly installed. Alternatively, if the pier is a steel structure, the leveling steel plate of the pier is directly welded to the structural steel plate of the pier, and a stiffening plate is installed at this location on the pier. Step 3: The leveling steel plate at the bottom of the beam, the vertical steel plate, and the vertical baffle are welded to the main beam as a whole at the factory. Alternatively, if the main beam is a concrete main beam, a pre-embedded steel plate at the bottom of the beam and pre-embedded reinforcing bars are pre-embedded during the pouring of the main beam, and the leveling steel plate at the bottom of the beam is directly welded to the pre-embedded steel plate at the bottom of the beam.

[0030] Step 4: Weld the transverse steel plate and the longitudinal limiting steel plate into an integral structure.

[0031] Step 5: Assemble the device and accurately position it on site. Weld the leveling steel plate of the pier onto the pre-embedded steel plate of the pier, and then weld the integral structure of the horizontal steel plate onto the leveling steel plate of the pier. During installation, make sure that the vertical baffle is tightly attached to the horizontal steel plate.

[0032] Furthermore, in step 3 of the installation process, if the plane of the main beam at the pier location is on a curve, the specific location of the beam bottom limiting device needs to be determined according to the pier location to ensure that the transverse steel plate is along the longitudinal direction of the bridge and parallel to the vertical steel plate.

[0033] The present invention has been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the embodiments described above. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention. Many other changes and modifications made without departing from the concept and scope of the present invention should be considered within the scope of protection of the present invention.

[0034] In the description of this specification, specific features, structures, materials, or characteristics may be combined in any suitable manner in one or more embodiments or examples.

[0035] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A tensile-resistant device for pedestrian bridges, characterized in that, include: Piers and beams mounted on the piers; A vertical steel plate is provided downwards at the bottom of the beam; A vertical baffle is provided at the lower end of the vertical steel plate; Tensile structural members are provided on the vertical steel plate above the vertical baffle on one side of the pier.

2. The anti-tensile device for pedestrian bridges as described in claim 1, characterized in that, The tensile structural member consists of two parallel transverse steel plates set on one side of the pier, corresponding to the vertical steel plate. The lower edge of the transverse steel plates is located above the upper surface of the vertical baffle, and the vertical steel plate is set between the two transverse steel plates.

3. The pedestrian bridge tensile resistance device as described in claim 1, characterized in that, The two transverse steel plates are provided with a longitudinal limiting steel plate on one side of the far pier.

4. The pedestrian bridge tensile resistance device as described in claim 1, characterized in that, The pier is a concrete pier, and the concrete pier contains pre-embedded steel bars and pre-embedded steel plates for the corresponding tensile structural members.

5. The pedestrian bridge tensile resistance device as described in claim 4, characterized in that, A leveling steel plate is provided between the pre-embedded steel plate of the pier and the tensile structural component.

6. The anti-tensile device for pedestrian bridges as described in claim 1, characterized in that, The pier is a steel structure pier, and a leveling steel plate is welded to one side of the steel structure pier corresponding to the tensile structural member.

7. The anti-tensile device for pedestrian bridges as described in claim 1, characterized in that, A beam bottom leveling steel plate is provided between the beam and the vertical steel plate.

8. The installation method of a tensile-resistant device for pedestrian bridges as described in any one of claims 1 to 7, characterized in that: The method includes the following steps: Step 1: Determine the location of the tensile device; Step 2: Embed steel plates for the piers during the pier pouring process; Step 3: The leveling steel plate at the bottom of the beam, the vertical steel plate, and the vertical baffle are welded to the main beam as a whole in the factory; Step 4: Weld the transverse steel plate and the longitudinal limiting steel plate into a single structure; Step 5: Accurately locate the pier leveling steel plate on site, weld it onto the pre-embedded steel plate of the pier, and then weld the integrated structure of the transverse steel plate onto the pier leveling steel plate.

9. The installation method of the tensile-resistant device for pedestrian bridges as described in claim 8, characterized in that: In step 3 of the installation process, if the plane of the main beam at the pier location is on a curve, the specific location of the beam bottom limiting device needs to be determined according to the pier location to ensure that the transverse steel plate is along the longitudinal direction of the bridge and parallel to the vertical steel plate.

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