Stability maintaining mechanism based on prestressed concrete small box girder type combined bridge

Abstract

The utility model discloses a stability maintaining mechanism based on a prestressed concrete small box girder type combined bridge, which comprises a base, a plurality of reinforcing steel bars distributed at intervals are welded on the lower surface of the base, support beams are fixedly mounted at four corners of the upper surface of the base, and the included angle between every two adjacent support beams is 45 degrees. A bearing disc is welded to the upper surface of the end, away from the base, of the supporting beam, and conical heads distributed at intervals are arranged on the upper surface of the bearing disc. In the application process, the bridge supporting column which tends to incline due to impact shaking can play a role in maintaining stability and inhibiting inclination, and the end of a small box girder separated from the rubber support can be supported through the bearing disc under the condition that the end of the small box girder is in contact with a conical head. And therefore, the phenomenon that the small box girder falls off after being separated from the rubber support can be avoided, and popularization and application are facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of bridges, in particular to a stability maintaining mechanism based on a pre-stressed concrete small box girder composite bridge. Background Technique

[0002] A pre-stressed concrete small box girder composite bridge refers to a wall surface formed by overlapping multiple pre-stressed concrete small box girders between adjacent beam caps. Since the small box girder structure is relatively light and easy to transport, it is convenient to be transported to the site for hoisting and splicing after being prefabricated in the factory, so it is widely used.

[0003] For the hoisting and splicing of small box girders on site, the lower surface of the end of the small box girder and the beam cap are mostly supported by rubber bearings. However, due to the limited width of the upper surface of the beam cap and the need to support the small box girders on both sides at the same time, the rubber bearing is located on one side in the middle of the upper surface of the beam cap.

[0004] In the above situation, when a large transportation vehicle such as a truck or a ship hits the support column corresponding to the beam cap, it is very easy to cause the separation between the end of the small box girder on the opposite side of the inclined support column and the rubber bearing due to the inclination of the support column, and finally the whole small box girder drops. For this reason, we propose a stability maintaining mechanism based on a pre-stressed concrete small box girder composite bridge. Content of the Utility Model

[0005] The purpose of the utility model is to solve the deficiencies existing in the prior art, and to propose a stability maintaining mechanism based on a pre-stressed concrete small box girder composite bridge.

[0006] In order to achieve the above purpose, the utility model adopts the following technical scheme:

[0007] A stability maintaining mechanism based on a pre-stressed concrete small box girder composite bridge includes a base, and a plurality of reinforcing bars are welded to the lower surface of the base at intervals.

[0008] Support beams are fixedly installed at the four corners of the upper surface of the base, and the included angle between adjacent support beams is 45 degrees.

[0009] A bearing plate is welded to the upper surface of the end of the support beam far away from the base.

[0010] Cone heads are arranged on the upper surface of the bearing plate at intervals.

[0011] Preferably, the support beam is a square tube beam with a hollow interior, and sealing plates integrally formed with the support beam are arranged at both ends of the support beam.

[0012] Preferably, a U-shaped fixing frame is sleeved on the beam head of the support beam corresponding to the base.

[0013] Preferably, the fixing frame includes a fixing base and a fixing frame which are respectively in a U shape. The fixing frame is arranged inside the upper surface of the fixing base. The inner frame surface of the fixing frame is flush with the inner surface of the fixing base, and the fixing frame and the fixing base are of an integral structure.

[0014] Preferably, a first riveting nail is commonly connected between the fixing base and the corresponding base, and a second riveting nail is commonly connected between the fixing frame and the corresponding support beam and the plugging plate.

[0015] Preferably, the bearing disc and the cone head are of an integral structure, and the exposed surfaces of the cone head and the bearing disc are both coated with a corrosion-resistant layer.

[0016] The stability maintaining mechanism of the pre-stressed concrete small box girder type composite bridge proposed by the present utility model has the beneficial effects that: in the process of applying this technical solution, first, the whole stability maintaining mechanism is positioned and installed at the middle part of the beam cover surface at the center of the side-by-side small box girders. During the use after installation, when the support column to which the beam cover belongs shakes and tilts, at this time, the stability maintaining mechanism can obtain support through the bearing disc when contacting the end of the small box girder that has separated from the rubber bearing, so as to avoid the phenomenon that the small box girder drops after separating from the rubber bearing.

[0017] In the process that the support column shakes and tends to tilt due to impact, since the small box girder can contact the cone head of the bearing disc, at the moment of contact, the self-gravity of the small box girder is transmitted to the stability maintaining mechanism and acts on the support column that tends to tilt through the stability maintaining mechanism, thereby being able to play a certain role in restraining the tilt of the support column, that is, being able to play a role in maintaining the stability of the pre-stressed concrete small box girder type composite bridge. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a schematic structural diagram of the stability maintaining mechanism of the pre-stressed concrete small box girder type composite bridge proposed by the present utility model;

[0019] Figure 2 is a sectional view taken along the line A-A of the stability maintaining mechanism of the pre-stressed concrete small box girder type composite bridge proposed by the present utility model;

[0020] Figure 3 is a sectional view taken along the line B-B of the stability maintaining mechanism of the pre-stressed concrete small box girder type composite bridge proposed by the present utility model;

[0021] Figure 4 is a bottom view of the base proposed by the present utility model;

[0022] Figure 5 is an observation schematic diagram of the stability maintaining mechanism from above the bridge, wherein the small box girder is represented by a dotted line;

[0023] Figure 6 Schematic view of the stability maintenance mechanism proposed by the present utility model observed from the side of the bridge, where the unshown part of the rubber bearing is represented by a dashed line.

[0024] In the figure: base 1, steel bar rod 2, support beam 3, fixing frame 4, fixing seat 401, fixing frame 402, first riveting nail 5, second riveting nail 6, bearing plate 7, cone head 8, small box girder 9, rubber bearing 10, beam cover 11, support column 12. Specific embodiments

[0025] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments.

[0026] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model.

[0027] Referring to Figure 1-6 , for the stability maintenance mechanism of the prestressed concrete small box girder type composite bridge, it includes a base 1. A plurality of steel bar rods 2 distributed at intervals are welded to the lower surface of the base 1. During the installation process, the steel bar rods 2 penetrate into the beam cover 11 corresponding to the small box girder 9 and are synchronously concreted with the beam cover 11, thereby ensuring the stability of the entire stability maintenance mechanism relative to the beam cover 11.

[0028] Support beams 3 are fixedly installed at the four corners of the upper surface of the base 1, and the included angle between adjacent support beams 3 is 45 degrees.

[0029] The support beam 3 is a square tube beam with a hollow interior, and plugging plates integrally formed with the support beam 3 are provided at both ends of the support beam 3. A U-shaped fixing frame 4 is sleeved at the beam head of the support beam 3 corresponding to the base 1.

[0030] The fixing frame 4 includes a fixing seat 401 and a fixing frame 402 respectively in the shape of a U. The fixing frame 402 is arranged inside the upper surface of the fixing seat 401. The inner frame surface of the fixing frame 402 is flush with the inner surface of the fixing seat 401, and the fixing frame 402 and the fixing seat 401 are of an integral structure.

[0031] The fixing seat 401 and the corresponding base 1 are commonly connected by a first rivet nail 5, and the fixing frame 402 and the corresponding support beam 3 and the blocking plate are commonly connected by a second rivet nail 6. When the fixing seat 401 and the base 1, and the fixing frame 402 and the support beam 3 are connected by the first rivet nail 5 and the second rivet nail 6, the stability between the base 1, the fixing frame 4 and the support beam 3 can be ensured.

[0032] A bearing plate 7 is welded to the upper surface of the end of the support beam 3 away from the base 1, and the upper surface of the bearing plate 7 is provided with cone heads 8 distributed at intervals. The bearing plate 7 and the cone heads 8 are an integrated structure, and the exposed surfaces of the cone heads 8 and the bearing plate 7 are coated with a corrosion-resistant layer. When the bearing plate 7 contacts the small box beam 9 through the cone heads 8, the cone heads 8 can enhance the friction between the bearing plate 7 and the small box beam 9.

[0033] To sum up: during the application of the present stabilization mechanism, the entire stabilization mechanism is first positioned based on the fact that the center of the side-by-side small box beams 9 is in the middle of the surface of the beam cover 11, that is, the placement position of the base 1 is determined, and further, when the steel bars 2 are connected to the steel bars in the beam cover 11, the base 1 is installed relative to the beam cover 11 based on the pouring and solidification of the concrete of the beam cover 11; with the completion of the construction of the small box beam 9 relative to the beam cover 11, the cone head 8 is close to but not in contact with the lower surface of the outside of the small box beam 9, and the load-bearing plate 7 is extended to the outside of the beam cover 11 on both sides of the beam cover 11.

[0034] In this state, when the support column 12 to which the beam cover 11 belongs shakes and tilts, the stabilizing mechanism can support the end of the small box beam 9 that has separated from the rubber support 10 through the supporting plate 7 when in contact with the cone head 8, so as to prevent the small box beam 9 from falling after separating from the rubber support 10.

[0035] When the support column 12 shakes and tends to tilt due to impact, since the small box girder 9 can come into contact with the cone head 8 of the load-bearing plate 7, the small box girder 9's own gravity is transmitted to the stabilizing mechanism at the moment of contact, and acts on the tilted support column 12 through the stabilizing mechanism, thereby playing a role in suppressing the tilt of the support column 12 to a certain extent, that is, it can play a role in stabilizing the prestressed concrete small box girder composite bridge.

[0036] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A stabilization mechanism based on a prestressed concrete small box girder composite bridge, comprising a base (1), characterized in that: A plurality of reinforcing bars (2) are welded to the lower surface of the base (1) at intervals; Support beams (3) are fixedly installed at the four corners of the upper surface of the base (1), and the included angle between adjacent support beams (3) is 45 degrees; A bearing plate (7) is welded to the upper surface of the end of the support beam (3) far from the base (1); Cone heads (8) are arranged at intervals on the upper surface of the bearing plate (7).

2. The stabilization mechanism based on prestressed concrete small box girder composite bridge according to claim 1 is characterized in that: The support beam (3) is a square tube beam with a hollow interior, and sealing plates integrally formed with the support beam (3) are provided at both ends of the support beam (3).

3. The stabilization mechanism based on prestressed concrete small box girder composite bridge according to claim 2 is characterized in that: A U-shaped fixing frame (4) is sleeved at the beam head of the support beam (3) corresponding to the base (1).

4. The stabilization mechanism based on prestressed concrete small box girder composite bridge according to claim 3 is characterized in that: The fixing frame (4) includes a fixing seat (401) and a fixing frame (402) respectively in the shape of a U. The fixing frame (402) is arranged inside the upper surface of the fixing seat (401). The inner frame surface of the fixing frame (402) is flush with the inner surface of the fixing seat (401), and the fixing frame (402) and the fixing seat (401) are of an integral structure.

5. The stabilization mechanism based on prestressed concrete small box girder composite bridge according to claim 4 is characterized in that: A first rivet (5) is jointly connected between the fixing seat (401) and the corresponding base (1), and a second rivet (6) is jointly connected between the fixing frame (402) and the corresponding support beam (3) and the sealing plate.

6. The stabilization mechanism based on prestressed concrete small box girder composite bridge according to claim 1 is characterized in that: The bearing plate (7) and the cone head (8) are of an integral structure, and corrosion-resistant coatings are applied to the exposed surfaces of the cone head (8) and the bearing plate (7).

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