A top-supported steel box arch bridge structure

Abstract

The present invention discloses an upper-supported steel box continuous arch bridge structure, comprising an upper structure and a lower structure, wherein the lower structure is a three-column cylindrical pier; the upper structure comprises at least three steel-concrete joint sections corresponding to the three-column cylindrical piers, hollow area arch ribs, solid area arch-beam joint sections and a hollow area bridge deck system; in the present invention, the use of a steel continuous arch bridge can significantly reduce the amount of concrete used, thereby effectively reducing the environmental pollution generated during the construction process, and large-scale prefabrication and assembly are used, and the component processing process is all completed in the prefabrication site, which not only ensures the construction quality, but also reduces waste pollution and harmful gas emissions on the construction site, and improves the beauty of the surrounding environment during the construction process.

Description

Technical Field

[0001] The present invention relates to the technical field of bridge structures, and in particular to a top-supported steel box arch bridge structure. Background Art

[0002] Most bridge structures are made of cast concrete. During the construction process, such bridge structures have problems such as great casting difficulty, long construction period, and high concrete consumption due to the overall use of concrete casting. In addition, when constructing large-span arch bridges, the overall casting method is not conducive to sharing the pressure of the bridge deck, resulting in reduced stability of the overall bridge and low safety. Summary of the Invention

[0003] The main purpose of the present invention is to provide a top-supported steel box arch bridge structure, aiming to solve the existing technical problems.

[0004] To achieve the above object, the present invention provides a top-decker steel box arch bridge structure, comprising an upper structure and a lower structure, wherein the lower structure is a three-column cylindrical pier;

[0005] The superstructure includes at least three steel-concrete joint sections corresponding to the three-column cylindrical piers, hollow area arch ribs, solid area arch-beam joint sections, and a hollow area bridge deck system;

[0006] The steel-concrete combination section is in a "Y"-shaped structure, and the two upper ends of the steel-concrete combination section are connected with the hollow area arch ribs. The steel-concrete combination section and the hollow area arch ribs connected on both sides form a "V"-shaped structure. The hollow area arch ribs on each side are connected to the solid area arch beam combination section. Both ends of the hollow area bridge deck system are connected to the solid area arch beam combination section on the corresponding side, and together with the hollow area arch ribs and the steel-concrete combination section, they form a hollow area structure.

[0007] Furthermore, the solid area arch-beam combination section includes a box beam section and an arch beam section, the arch beam section is arched and smoothly connected to the hollow area arch rib, and the connection between the box beam section and the arch beam section is an arc-shaped inner concave surface.

[0008] Furthermore, a connecting component is provided at the connecting end of the solid area arch-beam combination section and the hollow area bridge deck system, and the connecting component includes a first plate, a connecting plate and a second plate connected in sequence, the first plate is connected to the side end face of the box beam section, the connecting plate is connected to the arc-shaped inner concave surface, the second plate is connected to the outer arch surface of the arch beam section, the first plate is provided with a concave table surface away from the connection end with the connecting plate, the end of the hollow area bridge deck system has a protrusion that is integrally formed and cooperates with the concave table surface, and when the hollow area bridge deck system is installed, the protrusion is connected to the concave table surface to form support and lateral limitation, and a first hole is opened on the second plate.

[0009] Furthermore, a first column is provided on the concave table, a first groove cooperating with the first column is provided on the protruding portion, and the first column is inserted into the first groove to form a longitudinal limit when the protruding portion is connected to the concave table.

[0010] Furthermore, the second plate is provided with a convex plate at an angle of ° to the connecting end away from the connecting plate, and a second groove is provided on the convex plate. A second column that cooperates with the second groove is provided on the hollow area arch rib, and the second column is inserted into the second groove at the same time as the arch beam section is connected to the hollow area arch rib to form a longitudinal limit.

[0011] Furthermore, the second plate is provided with a clamping plate coplanarly connected to the connecting end of the connecting plate away from the connecting end, and the clamping plate is connected to the convex plate at an angle of °. When the hollow area arch rib is connected to the box beam section, the combined structure of the clamping plate and the convex plate is in close contact with the adjacent surface on the upper side of the connecting end of the hollow area arch rib, and a second hole is provided on the clamping plate.

[0012] Furthermore, the lower arch surface of the hollow area bridge deck is provided with a first rod and a second rod. When the hollow area bridge deck is connected to the box beam section, the first rod passes through the first hole and extends into the interior of the arch beam section, and the second rod passes through the second hole and extends into the interior of the hollow area arch rib.

[0013] Furthermore, the first plate is provided with an integrally formed first sliding portion, the convex plate is provided with an integrally formed second sliding portion, and the box beam section and the arch beam section are respectively provided with a third groove and a fourth groove that cooperate with the first sliding portion and the second sliding portion in the longitudinal movement.

[0014] Furthermore, an integrally formed extension plate is provided at the end of the hollow area arch rib, and the end of the arch beam section is connected to the extension plate.

[0015] Furthermore, the two hollow area arch ribs connected to the steel-concrete joint section at the same location are connected by an arch rib tie beam.

[0016] The beneficial effects of the present invention are embodied in:

[0017] In the present invention, the use of steel arch bridges can significantly reduce the amount of concrete used, thereby effectively reducing the environmental pollution generated during the construction process. Large-scale prefabrication and assembly are adopted, and the component processing process is all completed in the prefabrication site, which not only ensures the construction quality, but also reduces waste pollution and harmful gas emissions at the construction site, and improves the beauty of the surrounding environment during the construction process. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the arch bridge structure of the present invention;

[0019] Figure 2 For the present invention Figure 1 Schematic diagram of the structure in front view;

[0020] Figure 3 For the present invention Figure 2 A schematic diagram of the structure at center A;

[0021] Figure 4 This is a schematic diagram of the connection assembly structure of the present invention;

[0022] Figure 5 This is a schematic diagram of the hollow area bridge deck system structure of the present invention;

[0023] Figure 6 This is a structural diagram of the arch-beam combination section in the solid web area of ​​the present invention;

[0024] Figure 7 It is an overall schematic diagram of the arch bridge structure of the present invention.

[0025] Description of reference numerals:

[0026] 100, cylindrical pier; 200, steel-concrete joint section; 300, hollow area arch rib; 301, extension plate; 302, second column; 400, solid area arch-beam joint section; 401, box beam section; 402, arch beam section; 403, third trough; 404, fourth trough; 500, hollow area bridge deck system; 501, first rod; 502, second rod; 503, protrusion; 504, first trough; 600, bridge Surface structure; 700, connecting assembly; 701, first plate; 702, connecting plate; 703, second plate; 7031, first hole; 704, convex plate; 705, second groove; 706, concave table; 707, first column; 708, first sliding part; 709, clamping plate; 7091, second hole; 710, second sliding part; 800, support platform; 801, convex part; 900, arch rib tie beam. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. In the absence of conflict, the embodiments in this application and the features in the embodiments can be combined with each other. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0028] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indications will also change accordingly.

[0029] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or suggesting their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of such features. In addition, the meaning of "and / or" appearing throughout the text includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or schemes in which A and B are satisfied at the same time. In addition, "multiple" refers to more than two. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist.

[0030] See also Figure 1 、 Figure 2 and Figure 7 The present invention provides a top-supported steel box arch bridge structure, comprising an upper structure and a lower structure, wherein the lower structure is a three-column cylindrical pier 100;

[0031] The superstructure includes at least three steel-concrete joint sections 200 correspondingly connected to the three-column cylindrical piers 100, hollow area arch ribs 300, solid area arch-beam joint sections 400, and a hollow area bridge deck system 500;

[0032] The steel-concrete joint section 200 has a "Y"-shaped structure. The two upper ends of the steel-concrete joint section 200 are connected to the hollow area arch ribs 300. The steel-concrete joint section 200 and the hollow area arch ribs 300 connected on both sides form a "V"-shaped structure. The hollow area arch ribs 300 on each side are connected to the solid area arch beam joint section 400. Both ends of the hollow area bridge deck system 500 are connected to the solid area arch beam joint section 400 on the corresponding side, and together with the hollow area arch ribs 300 and the steel-concrete joint section 200, they form a hollow area structure.

[0033] After the splicing is completed, the bridge deck structure is hoisted on the solid area arch-beam joint section 400 and the hollow area bridge deck system 500 to complete the overall arch bridge construction.

[0034] This structure can adapt to the construction of large-span bridges. The porous steel box arch bridge is conducive to sharing the pressure of the bridge and improving the stability of the large-span bridge. It is also conducive to the manufacture and installation of steel box arch bridges and improves the efficiency of prefabricated production.

[0035] The use of steel arch bridges can significantly reduce the amount of concrete used, thereby effectively reducing the environmental pollution generated during the construction process. Large-scale prefabrication and assembly are used, and the component processing process is all completed in the prefabrication site. This not only ensures the construction quality, but also reduces waste pollution and harmful gas emissions at the construction site, and improves the beauty of the surrounding environment during the construction process.

[0036] The construction sequence of the arch bridge structure is: substructure construction - arch rib installation - arch-beam joint section in the solid area, arch-beam joint section in the solid area, joint section, box girder in the hollow area, installation of the transverse connection system between box girders - painting.

[0037] The arch bridge structure consists of 17 hollow steel box arches, each with a calculated span of 91 meters. The center of the ninth span is the center of symmetry for the entire arch. The design elevation of the bridge deck is +39.958 meters, with a maximum calculated rise of 18 meters, which gradually decreases from the center to a minimum of 7.44 meters at each end. The rise-to-span ratio decreases from 1 / 5.06 to 1 / 12.23, and the arch axes are all circular curves. The theoretical arch rise lines of the main bridge are all located on the same horizontal line, with a design elevation of +19.143 meters. The hollow arch rings are divided transversely into three arch ribs, each with a box-shaped section and a transverse center-to-center spacing of 6.5 meters. The hollow section of the pier top utilizes a simply supported steel box girder with a single-cell, three-box cross-section. The solid section of the arch crown combines the deck box girder and the arch rings to form a three-box, single-cell cross-section.

[0038] In one embodiment, see Figure 3 、 Figure 4 and Figure 6 The solid area arch beam connection section 400 includes a box beam section 401 and an arch beam section 402. The arch beam section 402 is arched and smoothly connected to the hollow area arch rib 300. The connection between the box beam section 401 and the arch beam section 402 is an arc-shaped inner concave surface.

[0039] Specifically, during hoisting, the two ends of the arch beam section 402 are respectively connected to the hollow area arch ribs 300 on both sides, and together they form a continuous arc surface, wherein the arch feet of the two adjacent arches are connected as a whole, and the arch feet adopt a composite section of concrete poured into a steel box.

[0040] In one embodiment, see Figure 3 、 Figure 4 and Figure 5 The connecting end of the solid area arch beam combination section 400 and the hollow area bridge deck system 500 is provided with a connecting assembly 700, and the connecting assembly 700 includes a first plate 701, a connecting plate 702 and a second plate 703 connected in sequence. The first plate 701 is connected to the side end face of the box beam section 401, the connecting plate 702 is connected to the arc-shaped inner concave surface, and the second plate 703 is connected to the outer arch surface of the arch beam section 402. The first plate 701 is provided with a concave table surface 706 away from the connection end with the connecting plate 702. The end of the hollow area bridge deck system 500 has a protrusion 503 that is integrally formed and cooperates with the concave table surface 706. When the hollow area bridge deck system 500 is installed, the protrusion 503 is connected to the concave table surface 706 to form support and lateral limitation. A first hole 7031 is opened on the second plate 703.

[0041] After the hollow area arch rib 300 and the solid area arch beam connecting section 400 are assembled, the hollow area bridge deck system 500 is hoisted from top to bottom so that its two ends are connected with the solid area arch beam connecting sections 400 on both sides. Specifically, the protrusion 503 at the end of the hollow area bridge deck system 500 falls from top to bottom on the concave table 706 until the two form a tight connection, which not only provides support for the hollow area bridge deck system 500, but also provides a horizontal limiting effect on the installation of the hollow area bridge deck system 500, so that only longitudinal adjustment is required during the subsequent adjustment process, which provides convenience for the installation of the hollow area bridge deck system 500.

[0042] Preferably, a support platform 800 connected to the first plate 701 and the connecting plate 702 is further provided, and a convex portion 801 is provided on the top surface of the support platform 800, and a groove adapted to the convex portion is provided on the hollow area bridge deck system 500. During hoisting, the hollow area bridge deck system 500 is limited by the convex portion after being placed, which has a further limiting effect, and can also provide additional support for the hollow area bridge deck system 500, further improving the stability of the hollow area bridge deck system 500 after hoisting, thereby improving the overall stability of the bridge.

[0043] In one embodiment, see Figure 3 and Figure 4 A first column 707 is provided on the concave table 706, and a first groove 504 cooperating with the first column 707 is opened on the protrusion 503. The first column 707 is connected to the concave table 706 and inserted into the first groove 504 to form a longitudinal limit.

[0044] When the bridge deck system 500 in the hollow area is hoisted, as the protruding part is located on the concave table surface, the first column is simultaneously inserted into the first groove, forming a lateral limit for the bridge deck system 500 in the hollow area while performing a longitudinal limit, thereby improving the success rate of the one-time installation of the bridge deck system 500 in the hollow area, and no additional reinforcement operations are required subsequently, and concrete pouring operations can be carried out.

[0045] In one embodiment, see Figure 3 and Figure 4 The second plate 703 is provided with a convex plate 704 at a 90° angle to the connecting end thereof away from the connecting end thereof, and the convex plate 704 is provided with a second groove 705. The hollow area arch rib 300 is provided with a second column 302 that cooperates with the second groove 705. The second column 302 is connected to the hollow area arch rib 300 at the same time as the arch beam section 402 is connected to the hollow area arch rib 300, and is inserted into the second groove 705 to form a longitudinal limit.

[0046] Such a structural arrangement enables the solid area arch beam connecting section 400 to play a pre-guiding role when being connected with the hollow area arch rib 300 through the arrangement of the second column 302. After the second groove 705 contacts the second column 302, the solid area arch beam connecting section 400 only needs to be moved horizontally to achieve assembly connection with the hollow area arch rib 300. At the same time, after assembly, the second column 302 can also play a longitudinal limiting effect on the solid area arch beam connecting section 400, preventing the solid area arch beam connecting section 400 from being offset in the longitudinal position due to hoisting, thereby increasing the difficulty of subsequent position adjustment operations.

[0047] In one embodiment, see Figure 3 and Figure 4 A retaining plate 709 is provided on the second plate 703, away from the end connected to the connecting plate 702, and is coplanarly connected thereto. The retaining plate 709 is connected to the protruding plate 704 at a 90° angle. When the hollow area arch rib 300 is connected to the box beam section 401, the combined structure of the retaining plate 709 and the protruding plate 704 is in close contact with the upper adjacent surface of the connecting end of the hollow area arch rib 300. A second hole 7091 is formed in the retaining plate 709. This arrangement facilitates the positional connection between the combined structure of the retaining plate 709 and the protruding plate 704 and the end of the hollow area arch rib 300 when the solid area arch beam connecting section 400 is connected to the hollow area arch rib 300, making the connection between the two more precise, increasing the contact area between the two, and improving the stability of the subsequent connection.

[0048] In one embodiment, see Figure 3 and Figure 4 The lower arch surface of the hollow area bridge deck system 500 is provided with a first rod 501 and a second rod 502. When the hollow area bridge deck system 500 is connected to the box beam section 401, the first rod 501 passes through the first hole 7031 and extends into the interior of the arch beam section 402, while the second rod 502 passes through the second hole 7091 and extends into the interior of the hollow area arch rib 300. With this arrangement, after the hollow area bridge deck system 500 is hoisted, the first rod and the second rod are respectively inserted into the first hole and the second hole, pass through the clamping plate 709 and the second plate, and connect to the hollow area arch rib 300 and the solid area arch beam connecting section 400, thereby improving the connection strength among the hollow area bridge deck system 500, the hollow area arch rib 300, and the solid area arch beam connecting section 400, forming a connected whole, thereby improving the stability of the bridge.

[0049] In one embodiment, see Figure 3 and Figure 4 The first plate 701 is provided with an integrally formed first sliding portion 708, the convex plate 704 is provided with an integrally formed second sliding portion 710, and the box beam section 401 and the arch beam section 402 are respectively provided with a third groove 403 and a fourth groove 404 that cooperate with the first sliding portion 708 and the second sliding portion 710 in the longitudinal movement.

[0050] Specifically, during installation, the first sliding part 708 and the second sliding part 710 are slid longitudinally into the third groove 403 at the box beam section 401 and the fourth groove 404 of the arch beam section, respectively, to complete the connection between the connecting component 700 and the solid web area arch beam connecting section 400. This connection method has the advantages of simple assembly and easy operation, saving the assembly time of the prefabricated structure, and thus helping to shorten the construction period.

[0051] In one embodiment, see Figure 3 and Figure 4 The ends of the hollow-section arch ribs 300 are provided with integrally formed extension plates 301, to which the ends of the arch beam sections 402 are connected. The provision of the extension plates allows the box beam sections 401 to rest on the extension plates 301 when the solid-section arch beam junction sections 400 are assembled with the hollow-section arch ribs 300. The extension plates 301 provide stable pre-support for the box beam sections 401, alleviating the lifting pressure on the hoisting equipment and reducing the swaying amplitude of the solid-section arch beam junction sections 400 during welding, thereby simplifying construction.

[0052] In one embodiment, two hollow arch ribs 300 connected to the same steel-concrete joint section 200 are connected by an arch tie beam 900. The provision of the arch tie beam 900 connects the two hollow arch ribs 300 together, sharing the pressure they bear, providing overall structural strength, and thus improving the stability of the bridge.

[0053] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A deck-type steel box arch bridge structure, characterized by: It comprises an upper structure and a lower structure, wherein the lower structure is a three-column cylindrical pier (100); The superstructure comprises at least three steel-concrete joint sections (200) correspondingly connected to the three-column cylindrical piers (100), hollow area arch ribs (300), solid area arch-beam joint sections (400), and a hollow area bridge deck system (500); The steel-concrete combined section (200) is in a "Y"-shaped structure. Both upper ends of the steel-concrete combined section (200) are connected to hollow area arch ribs (300). The steel-concrete combined section (200) and the hollow area arch ribs (300) connected on both sides form a "V"-shaped structure. The hollow area arch ribs (300) on each side are connected to the solid area arch beam combined section (400). Both ends of the hollow area bridge deck system (500) are connected to the solid area arch beam combined section (400) on the corresponding side, and together with the hollow area arch ribs (300) and the steel-concrete combined section (200), form a hollow area structure. The solid-web area arch-beam combination section (400) comprises a box beam section (401) and an arch beam section (402); the arch beam section (402) is arched and smoothly connected to the hollow-web area arch rib (300); and the connection between the box beam section (401) and the arch beam section (402) is an arc-shaped inner concave surface; The connecting end of the solid area arch beam joint section (400) and the hollow area bridge deck system (500) is provided with a connecting assembly (700), the connecting assembly (700) comprising a first plate (701), a connecting plate (702) and a second plate (703) connected in sequence, the first plate (701) being connected to the side end face of the box beam section (401), the connecting plate (702) being connected to the arc-shaped inner concave surface, and the second plate (703) being connected to the outer arch of the arch beam section (402). The first plate (701) is provided with a concave table (706) at an end away from the connection end with the connecting plate (702); the end of the hollow area bridge deck system (500) has a protrusion (503) integrally formed and cooperating with the concave table (706); when the hollow area bridge deck system (500) is installed, the protrusion (503) is connected to the concave table (706) to form a support and a lateral limit; the second plate (703) is provided with a first hole (7031); The concave table (706) is provided with a first column (707), the protruding portion (503) is provided with a first groove (504) that cooperates with the first column (707), and the first column (707) is inserted into the first groove (504) when the protruding portion (503) is connected to the concave table (706) to form a longitudinal limit. The second plate (703) is provided with a convex plate (704) at a 90° angle to the connecting plate (702) away from the connecting end thereof, the convex plate (704) being provided with a second groove (705), the hollow area arch rib (300) being provided with a second column (302) cooperating with the second groove (705), and the second column (302) is inserted into the second groove (705) when the arch beam section (402) is connected to the hollow area arch rib (300) to form a longitudinal limit. The second plate (703) is provided with a clamping plate (709) coplanarly connected to the connecting plate (702) at a distance from the connecting end thereof, the clamping plate (709) being connected to the convex plate (704) at a 90° angle, and when the hollow area arch rib (300) is connected to the box beam section (401), the combined structure of the clamping plate (709) and the convex plate (704) is in close contact with the upper adjacent surface of the connecting end of the hollow area arch rib (300), and the clamping plate (709) is provided with a second hole (7091); The lower arch surface of the hollow area bridge deck system (500) is provided with a first rod (501) and a second rod (502). When the hollow area bridge deck system (500) is connected to the box beam section (401), the first rod (501) passes through the first hole (7031) and extends into the interior of the arch beam section (402), and the second rod (502) passes through the second hole (7091) and extends into the interior of the hollow area arch rib (300).

2. The deck-type steel box multi-arch bridge structure according to claim 1, characterized in that: The first plate (701) is provided with an integrally formed first sliding portion (708), the convex plate (704) is provided with an integrally formed second sliding portion (710), and the box beam section (401) and the arch beam section (402) are respectively provided with a third groove (403) and a fourth groove (404) that cooperate with the first sliding portion (708) and the second sliding portion (710) in longitudinal movement.

3. The deck-type steel box multi-arch bridge structure according to claim 1, characterized in that: An integrally formed extension plate (301) is provided at the end of the hollow area arch rib (300), and the end of the arch beam section (402) is connected to the extension plate (301).

4. The deck-type steel box multi-arch bridge structure according to claim 1, characterized in that: The two hollow area arch ribs (300) connected to the steel-concrete combined section (200) at the same location are connected via an arch rib tie beam (900).

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