Arc through beam bridge structure

Abstract

The utility model relates to an arc through type beam bridge structure, and belongs to the field of bridge engineering. Comprising two main beams, a plurality of cross beams, a plurality of inclined struts, a plurality of stiffening ribs and a bridge deck slab, the cross beams are arranged between the two main beams, the two ends of each cross beam are connected with the lower ends of the two main beams in a one-to-one correspondence mode, and the inclined struts are arranged in intervals formed by the cross beams respectively. The two ends of the inclined strut are connected with the lower ends of the two main beams in a one-to-one correspondence mode, the stiffening ribs are arranged on the main beams, and the bridge deck slab is laid at the top ends of the cross beams and the inclined strut; the two main beams and the cross beam form a U-shaped longitudinal section, a web section is arranged in each main beam, and each web section is of a platy structure with a dumbbell-shaped longitudinal section. The utility model is beneficial to improving the clearance height and span under the overpass bridge and the durability and service life of the bridge structure, and is attractive in appearance.

Description

Technical Field

[0001] The utility model relates to the field of bridge engineering, in particular to an arc-shaped through-type beam bridge structure. Background Art

[0002] Conventional concrete simply supported beam bridges are generally top-supported structures, which have some disadvantages in engineering applications: First, the structural height of a top-supported bridge is the sum of the main beam height and the bridge deck structure thickness, while the height of a concrete simply supported beam bridge is generally 1 / 17 to 1 / 20 of the main beam span. Therefore, the structural height of a large-span concrete simply supported beam bridge is relatively large, and the clearance height under the bridge is relatively small under the same conditions. When the clearance under the bridge is limited, the structural height becomes the key to controlling the design; Second, for large-span prefabricated beam bridges, the self-weight of the concrete simply supported beam is large, and the large self-weight of the segment is not conducive to transportation and installation. In addition, due to the limitation of the lifting capacity of the construction equipment, the span usually does not exceed 50 meters; Third, the concrete structure is prone to cracks, which is not conducive to operation and maintenance. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide an arc-shaped bottom-supported beam bridge structure suitable for large-span cross-line bridges with limited clearance under the bridge.

[0004] The technical solution of the present invention to solve the above-mentioned technical problems is as follows: an arc-shaped bottom-supported beam bridge structure, comprising: two main beams, multiple cross beams, multiple diagonal braces, multiple stiffening ribs and a bridge deck, the cross beam is arranged between the two main beams, and the two ends are connected to the lower ends of the two main beams in a one-to-one manner, the multiple diagonal braces are respectively arranged in the interval formed by the multiple cross beams, the two ends of the diagonal braces are connected to the lower ends of the two main beams in a one-to-one manner, the stiffening ribs are arranged on the main beams, and the bridge deck is laid on the cross beams and the top ends of the diagonal braces; the two main beams and the cross beams form a U-shaped longitudinal cross section, a web section is arranged in the main beam, and the web section is a plate-like structure with a dumbbell-shaped longitudinal cross section.

[0005] The beneficial effects of the present invention are as follows: by arranging the cross beam at the lower end of the main beam, a bottom-supported beam bridge structure is formed, which can significantly improve the clearance height and span under the cross-line bridge; the diagonal braces and stiffening ribs are conducive to improving the durability and service life of the bridge structure; the bridge as a whole has a U-shaped longitudinal cross-section, and the longitudinal cross-section of the web section is dumbbell-shaped, which is not only simple in structure, beautiful in appearance, and reasonable in force, but also has good durability and economy.

[0006] On the basis of the above technical solution, the present invention can also be improved as follows.

[0007] Furthermore, the main beam is an arched structure, and the main beam also includes two fulcrum equal thickness sections, and the two fulcrum equal thickness sections are arranged in a one-to-one correspondence at both ends of the web section.

[0008] The beneficial effects of adopting the above further solution are: the fulcrum and equal thickness sections are conducive to meeting the needs of prestressed anchoring, and the web sections are conducive to saving material usage, reducing the deadweight of the structure, facilitating transportation and installation, and improving the overall aesthetics.

[0009] Furthermore, the crossbeam includes a crossbeam body and two wet joints, and the two wet joints are arranged one-to-one at both ends of the crossbeam body. The two wet joints are connected one-to-one with the lower ends of the support equal thickness sections or the lower ends of the web sections close to one end of the two main beams.

[0010] The beneficial effects of adopting the above further solution are: the wet joint is conducive to connecting with the main beam to form a whole, and is conducive to anchoring on the stiffening ribs through prestressing, thereby improving the stability of the bridge.

[0011] Furthermore, the diagonal brace is an X-shaped structure, and both ends of the diagonal brace are connected to the lower ends of the web sections of the two main beams close to one end.

[0012] The beneficial effect of adopting the above further solution is that the diagonal bracing is conducive to improving the stability of the main beam during the prestressing construction.

[0013] Furthermore, the plurality of stiffening ribs are respectively arranged on the web sections of the two main beams on a side close to the cross beam and on a side away from the cross beam.

[0014] The beneficial effects of adopting the above further solution are: the stiffening ribs are conducive to improving the shear resistance of the main beam and facilitating the connection of the cross beams.

[0015] Furthermore, the position of the stiffening rib on the web segment close to the side of the cross beam corresponds to the connection point between the cross beam and the web segment.

[0016] The beneficial effect of adopting the above further solution is that it is conducive to anchoring the cross beam on the stiffening ribs through prestressing, and cooperates with the main beam to form a whole, thereby improving the stability of the bridge.

[0017] Furthermore, the bridge deck is a plate-like structure prefabricated in sections.

[0018] The beneficial effect of adopting the above further solution is that it is conducive to improving the convenience during bridge deck construction.

[0019] Furthermore, prestressed steel strands are provided in the main beam and the cross beam for tensioning to form a stable U-shaped structure.

[0020] The beneficial effects of adopting the above further solution are: it is conducive to forming a stable U-shaped structure between the main beam and the cross beam, giving full play to the mechanical properties of the UHPC material, improving the durability and service life of the bridge structure, and enhancing the aesthetic effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A schematic diagram of the overall structure provided for an embodiment of the present utility model;

[0022] Figure 2 A schematic diagram of a U-shaped structure formed by a main beam and a cross beam provided in an embodiment of the present utility model;

[0023] Figure 3 The main view of the overall structure provided by the embodiment of the utility model;

[0024] Figure 4 A top view of the overall structure provided by an embodiment of the utility model;

[0025] Figure 5 A schematic longitudinal cross-sectional view of a web section provided in an embodiment of the present utility model;

[0026] Figure 6 A schematic diagram of the connection between the main beam and the cross beam provided in an embodiment of the present utility model.

[0027] In the accompanying drawings, the components represented by the reference numerals are as follows:

[0028] 1. Main beam; 2. Cross beam; 3. Diagonal bracing; 4. Stiffening ribs; 5. Bridge deck; 11. Support section with equal thickness; 12. Web section; 21. Cross beam body; 22. Wet joint. DETAILED DESCRIPTION

[0029] The principles and features of the present invention are described below. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0030] like Figures 1 to 5 As shown, an arc-shaped bottom-supported beam bridge structure includes: two main beams 1, multiple cross beams 2, multiple diagonal braces 3, multiple stiffening ribs 4 and a bridge deck 5, the cross beam 2 is arranged between the two main beams 1, and the two ends are connected to the lower ends of the two main beams 1 in a one-to-one manner, the multiple diagonal braces 3 are respectively arranged in the interval formed by the multiple cross beams 2, the two ends of the diagonal braces 3 are connected to the lower ends of the two main beams 1 in a one-to-one manner, the stiffening ribs 4 are arranged on the main beams 1, and the bridge deck 5 is laid on the top of the cross beams 2 and the diagonal braces 3; the two main beams 1 and the cross beam 2 form a U-shaped longitudinal section, and a web section 12 is provided in the main beam 1, and the web section 12 is a plate-like structure with a dumbbell-shaped longitudinal section.

[0031] It should be noted that: in the preferred embodiment of the present invention, the main beam 1, the cross beam 2 and the bridge deck 5 are all made of ultra-high performance concrete (UHPC). Ultra-high performance concrete has excellent properties such as ultra-high toughness, ultra-high strength and good durability, which can effectively reduce the construction height of the bridge structure (the construction height of the bottom-supported beam bridge is the sum of the height of the cross beam 2 and the thickness of the bridge deck 5, and has nothing to do with the height of the main beam 1), which is conducive to increasing the clearance under the bridge; effectively saving material consumption, reducing the deadweight of the structure, facilitating transportation and installation, and having a larger span under the same equipment capacity conditions; significantly reducing structural cracks, effectively improving structural durability, and facilitating operation and maintenance; the bridge structure is light and beautiful in appearance, effectively improving the landscape effect of the bridge;

[0032] The main beam 1 can be prefabricated in multiple sections or as a whole.

[0033] The beneficial effects of the present invention are as follows: by arranging the cross beam at the lower end of the main beam, a bottom-supported beam bridge structure is formed, which can significantly improve the clearance height and span under the cross-line bridge; the diagonal braces and stiffening ribs are conducive to improving the durability and service life of the bridge structure; the bridge as a whole has a U-shaped longitudinal cross-section, and the longitudinal cross-section of the web section is dumbbell-shaped, which is not only simple in structure, beautiful in appearance, and reasonable in force, but also has good durability and economy.

[0034] Preferably, Figure 1 and Figure 3 As shown, the main beam 1 is an arch structure, and the main beam 1 further includes two support equal thickness sections 11 , and the two support equal thickness sections 11 are arranged at both ends of the web section 12 in a one-to-one correspondence.

[0035] The beneficial effects of adopting the above preferred solution are: the fulcrum and equal thickness sections are conducive to meeting the needs of prestressed anchoring, and the web sections are conducive to saving material usage, reducing the weight of the structure, facilitating transportation and installation, and improving the overall aesthetics.

[0036] Preferably, Figure 6 As shown, the crossbeam 2 includes a crossbeam body 21 and two wet joints 22. Two wet joints 22 are provided at both ends of the crossbeam body 21 in a one-to-one correspondence. The two wet joints 22 are connected one-to-one with the lower ends of the support equal thickness sections 11 or the lower ends of the web sections 12 close to one end of the two main beams 1.

[0037] The beneficial effects of adopting the above preferred solution are: the wet joint is conducive to connecting with the main beam to form a whole, and is conducive to anchoring on the stiffening ribs through prestressing, thereby improving the stability of the bridge.

[0038] Preferably, Figure 1 and Figure 4As shown, the diagonal brace 3 is an X-shaped structure, and both ends of the diagonal brace 3 are connected to the lower ends of the web sections 12 of the two main beams 1 close to one end.

[0039] It should be noted that in a preferred embodiment of the present invention, the X-shaped diagonal braces 3 are preferably steel pipes, and the number and position of the diagonal braces 3 are determined based on mechanical calculations during the early design of the bridge.

[0040] The beneficial effect of adopting the above preferred solution is that the diagonal bracing is conducive to improving the stability of the main beam during the prestressing construction.

[0041] Preferably, Figure 1 and Figure 3 As shown, the plurality of stiffening ribs 4 are respectively arranged on the web segments 12 of the two main beams 1 close to the cross beam 2 and on the web segments 12 away from the cross beam 2 .

[0042] The beneficial effects of adopting the above preferred solution are: the stiffening ribs are conducive to improving the shear resistance of the main beam and facilitating the connection of the cross beams.

[0043] Preferably, Figure 1 and Figure 3 As shown, the position of the stiffening rib 4 on the web section 12 close to the side of the cross beam 2 corresponds to the connection point between the cross beam 2 and the web section 12 .

[0044] The beneficial effect of adopting the above preferred solution is that it is conducive to anchoring the cross beam on the stiffening ribs through prestressing, and cooperates with the main beam to form a whole, thereby improving the stability of the bridge.

[0045] Preferably, the bridge deck 5 is a plate-like structure prefabricated in sections.

[0046] The beneficial effect of adopting the above preferred solution is that it is conducive to improving the convenience during bridge deck construction.

[0047] Preferably, Figure 6 As shown, prestressed steel strands are provided in the main beam 1 and the cross beam 2 for tensioning to form a stable U-shaped structure.

[0048] Among them, it should be noted that: Figure 6 The lines passing through the beams 2 in the illustrated structure represent prestressing tendons.

[0049] The beneficial effects of adopting the above preferred solution are: it is conducive to forming a stable U-shaped structure between the main beam and the cross beam, giving full play to the mechanical properties of the UHPC material, improving the durability and service life of the bridge structure, and enhancing the aesthetic effect.

[0050] The construction process of the present invention is described below by an embodiment:

[0051] Step 1: Prefabrication of components.

[0052] (1) Prefabrication of the main beam 1. The main beam 1 can be prefabricated in multiple sections or as a whole. The sections are prefabricated in a matching manner using the short-line method (the short-line method is a prior art in this field) to ensure that the joints fit tightly. The joints are dry-jointed or glue-jointed. When the main beam 1 is prefabricated, steel bars and steel sections connected to the cross beam 2 are embedded.

[0053] (2) Prefabrication of cross beam 2. The main beam 1 is connected to the cross beam 2 through pre-buried steel bars and steel members to form a steel skeleton of the cross beam 2. At the same time, when the cross beam 2 is cast, steel bars connected to the bridge deck 5 are pre-buried.

[0054] (3) Prefabrication of the bridge deck 5. The bridge deck 5 is prefabricated in blocks along the bridge direction, with the length between two adjacent cross beams 2 as the unit. The bridge deck 5 is prefabricated in blocks across the bridge direction according to the lifting capacity. When the bridge deck 5 is prefabricated, the wet joint connecting steel bars connecting it to the main beam 1 are embedded.

[0055] Step 2: On-site assembly of components.

[0056] After the components are transported to the site, the main beam 1 and the cross beam 2 are positioned, the wet joints 22 of the main beam 1 and the cross beam 2 are connected, the diagonal braces 3 are welded, and the prestressed steel strands of the cross beams are tensioned to initially form a stable U-shaped structure.

[0057] Step 3: Installation and construction of U-shaped structure.

[0058] If segmented lifting construction is adopted, the method is as follows:

[0059] (1) Install the support.

[0060] (2) Erect temporary piers.

[0061] (3) The segments are hoisted into place.

[0062] (4) Adjust the segments to ensure accurate butt jointing of the main beams 1. If the joints between the main beams 1 are glued, structural adhesive should be applied before butt jointing.

[0063] (5) Tension the prestressed steel strands of the main beam to form a stable overall U-shaped structure.

[0064] If jacking construction is adopted, the method is as follows:

[0065] (1) Assemble the components on the roadbed at one end of the bridge to form an overall U-shaped structure. The method is the same as (3), (4), and (5) of the segmented hoisting construction method. If the main beam 1 is prefabricated as a whole, (4) is not required.

[0066] (2) Install the support.

[0067] (3) Erect temporary piers.

[0068] (4) Push the overall U-shaped structure into place and drop the beams.

[0069] Step 4: Construction of bridge deck 5.

[0070] The prefabricated concrete bridge panels 5 are hoisted in sections, and the wet joints between the bridge panels 5 are cast.

[0071] Step 5: Construction of bridge deck pavement, guardrails and other auxiliary structures, and operation of the completed bridge.

[0072] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply 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 understood as a limitation to the present invention.

[0073] Furthermore, 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 the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of this utility model, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0074] In this utility model, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection; direct connection, or indirect connection through an intermediate medium; internal communication between two components, or interaction between two components, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0075] In the present invention, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0076] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and features of different embodiments or examples without contradiction.

[0077] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are illustrative and cannot be understood as limitations on the present invention. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A curved through beam bridge structure, characterized in that: include: Two main beams (1), a plurality of cross beams (2), a plurality of diagonal braces (3), a plurality of stiffening ribs (4) and a bridge deck (5), wherein the cross beam (2) is arranged between the two main beams (1), and the two ends thereof are connected to the lower ends of the two main beams (1) in a one-to-one correspondence, the plurality of diagonal braces (3) are respectively arranged in the interval formed by the plurality of cross beams (2), the two ends of the diagonal braces (3) are connected to the lower ends of the two main beams (1) in a one-to-one correspondence, the stiffening ribs (4) are arranged on the main beams (1), and the bridge deck (5) is laid on the top ends of the cross beams (2) and the diagonal braces (3); The two main beams (1) and the cross beam (2) form a U-shaped longitudinal section. A web section (12) is provided in the main beam (1). The web section (12) is a plate-like structure with a dumbbell-shaped longitudinal section.

2. The arc-shaped through beam bridge structure according to claim 1, characterized in that: The main beam (1) is an arched structure, and the main beam (1) further comprises two fulcrum equal-thickness sections (11), wherein the two fulcrum equal-thickness sections (11) are arranged in a one-to-one correspondence at both ends of the web section (12).

3. The arc-shaped through beam bridge structure according to claim 2, characterized in that: The crossbeam (2) comprises a crossbeam body (21) and two wet joints (22), wherein two wet joints (22) are provided at both ends of the crossbeam body (21) in a one-to-one correspondence, and the two wet joints (22) are connected to the lower ends of the support equal thickness sections (11) or the lower ends of the web sections (12) of the two main beams (1) close to one end.

4. The arc-shaped through beam bridge structure according to claim 2, characterized in that: The diagonal brace (3) is an X-shaped structure, and the two ends of the diagonal brace (3) are connected to the lower ends of the web sections (12) of the two main beams (1) close to one end.

5. The arc-shaped through beam bridge structure according to claim 2, characterized in that: The plurality of stiffening ribs (4) are respectively arranged on the web section (12) on the side of the two main beams (1) close to the cross beam (2) and on the web section (12) on the side away from the cross beam (2).

6. The arc-shaped through beam bridge structure according to claim 2, characterized in that: The position of the stiffening rib (4) on the web section (12) close to the side of the cross beam (2) corresponds to the connection point between the cross beam (2) and the web section (12).

7. The arc-shaped through beam bridge structure according to claim 1, characterized in that: The bridge deck (5) is a plate-like structure prefabricated in sections.

8. The arc-shaped through beam bridge structure according to claim 1, characterized in that: Prestressed steel strands for tensioning to form a stable U-shaped structure are provided in the main beam (1) and the cross beam (2).

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