Bridge construction method and bridge

Abstract

The present invention discloses a bridge construction method and a bridge, and relates to the technical field of bridge construction. The bridge construction method includes fixing the two ends of the main beam to the ends of the arch rib; tensioning the suspender between the main beam and the arch rib at the middle temporary strut; tensioning the suspender between the main beam and the arch rib at the same time in the middle area between the first end, the second end and the middle of the main beam; tensioning the suspender between the main beam and the arch rib at the two end fixing points; and tensioning the suspender between the main beam and the arch rib at three dispersed temporary struts from the middle of the main beam toward the first end and the second end, and the three dispersed temporary struts are positioned at the construction area closest to the middle temporary strut, the construction area closest to the dispersed temporary strut in the middle area, and the construction area closest to the end temporary strut, until all the suspenders are tensioned between the main beam and the arch rib. The construction method can improve the force uniformity between the arch ribs, main beams and suspenders of the bridge, and improve the safety of the bridge.

Description

Technical Field

[0001] The present invention relates to the technical field of bridge construction, and in particular to a bridge construction method. Background Art

[0002] After the hanger construction method of known bridges is completed, there are large differences in the forces between the arch ribs, main beams and hangers of some bridges, which can easily affect the safety and life of the bridges. Summary of the Invention

[0003] The purpose of the present invention is to provide a bridge construction method and a bridge, which can improve the force uniformity between the arch ribs, main beams and hangers of the bridge and improve the safety of the bridge.

[0004] In order to achieve the above technical effects, the technical solutions of the present invention are as follows:

[0005] A method for constructing a bridge, the bridge comprising a main beam and an arch rib, the arch rib being arranged on the main beam, and the two ends of the arch rib being fixedly connected to the first end and the second end of the main beam respectively, comprising: arranging temporary end braces on the first end, the second end and the two ends of the arch rib respectively, connecting the middle part of the main beam and the middle part of the arch rib through a middle temporary brace, connecting the main beam and the arch rib in the area between the end of the main beam and the middle part of the main beam through a plurality of dispersed temporary braces distributed at intervals along the length direction of the main beam; tensioning a suspender between the main beam and the arch rib at the middle temporary brace; tensioning a suspender between the main beam and the arch rib at the middle temporary brace; tensioning a suspender in the middle area between the first end and the middle part of the main beam, and between the second end and the main beam At the middle area between the middle parts of the main beam and the arch rib, the hanger is tensioned between the main beam and the arch rib at the same time; at the two end temporary struts, the hanger is tensioned between the main beam and the arch rib at the same time; from the middle part of the main beam toward the first end and the second end, at the three dispersed temporary struts in sequence, the hanger is tensioned between the main beam and the arch rib at the same time, and the positions of the three dispersed temporary struts are respectively the area to be constructed closest to the middle temporary strut, the area to be constructed closest to the middle area of ​​the dispersed temporary strut and the area to be constructed closest to the end temporary strut, until all the hangers are tensioned between the main beam and the arch rib.

[0006] Furthermore, the suspension rod includes two crossed suspension parts, and when the suspension rod is tensioned between the main beam and the arch rib, the two suspension parts are tensioned at the same time.

[0007] Furthermore, the acute angle between the length direction of the hanging portion and the length direction of the main beam is α, 55°≤α≤65°.

[0008] Furthermore, before tensioning the hanger, the temporary end struts, the temporary middle struts or the dispersed temporary struts corresponding to the hanger are first removed.

[0009] Furthermore, the two end temporary struts or the two dispersed temporary struts located on both sides of the middle temporary strut are removed in sequence.

[0010] Furthermore, before tensioning the hangers, all the hangers are installed between the main beam and the arch ribs, and all the hangers are placed in a relaxed state.

[0011] Furthermore, after the arch rib and the main beam are connected through the end temporary struts, the middle temporary struts and the dispersed temporary struts, all the hangers are installed between the main beam and the arch rib.

[0012] Furthermore, when the suspension rods are tensioned in the middle area and the area to be constructed of the dispersed temporary support rods closest to the middle area, only one suspension rod is tensioned.

[0013] A bridge is constructed using the bridge construction method described above, and the bridge includes: a main beam; arch ribs, the arch ribs are arched on the main beam, and the two ends of the arch ribs are fixedly connected to the two ends of the bridge; a plurality of hangers, the two ends of the plurality of hangers are respectively connected to the main beam and the arch ribs, and the plurality of hangers are distributed along the length direction of the main beam.

[0014] Furthermore, the suspension rod is a mesh structure.

[0015] The beneficial effects of the present invention are:

[0016] According to the bridge construction method of the present invention, the main beam and arch ribs are connected by two temporary end braces and a temporary middle brace, thereby forming a relatively stable load-bearing structure. Furthermore, because the main beam and arch ribs are fixedly connected at both ends, the hangers are first tensioned from the middle of the main beam, then from the two middle regions, and finally from the first and second ends. This improves the structural stability of the bridge when the hangers are tensioned. Furthermore, when the hangers are simultaneously tensioned in the two middle regions, the first and second ends, the area to be constructed with the dispersed temporary braces closest to the middle region, and the area to be constructed with the end temporary braces, since these locations are symmetrical relative to the middle of the main beam, the simultaneous tensioning of the hangers can prevent unbalanced loads on one side of the bridge where the main beam and arch ribs are connected by the hangers, further improving the structural stability of the bridge. Furthermore, by sequentially tensioning the hangers from the middle of the main beam toward the first and second ends, the hangers are tensioned first in the middle region, where the structural stability is relatively poor, similarly improving the structural stability of the bridge.

[0017] The bridge according to the present invention adopts the bridge construction method described above, which can improve the force uniformity of the bridge, thereby improving the structural stability, safety and life of the bridge.

[0018] Additional aspects and advantages of the present invention will be set forth in part in the description which follows and, in part, will be obvious from the description which follows, or may be learned by practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a flow chart of a bridge construction method provided by a specific embodiment of the present invention;

[0020] Figure 2 This is one of the structural schematic diagrams of the bridge construction process provided by the specific embodiment of the present invention;

[0021] Figure 3 This is the second structural diagram of the bridge construction process provided by the specific embodiment of the present invention;

[0022] Figure 4 This is the third structural diagram of the bridge construction process provided by the specific embodiment of the present invention;

[0023] Figure 5 This is the fourth structural diagram of the bridge construction process provided by the specific embodiment of the present invention;

[0024] Figure 6 This is the fifth structural diagram of the bridge construction process provided by the specific embodiment of the present invention.

[0025] Reference numerals

[0026] 100. Bridge; 10. Main beam; 11. First end; 12. Second end; 20. Arch rib; 31. Temporary end struts; 32. Temporary middle struts; 33. Dispersed temporary struts; 40. Hanger; 41. First tensioning section; 42. Second tensioning section. DETAILED DESCRIPTION

[0027] In order to make the technical problems solved by the present invention, the technical solutions adopted and the technical effects achieved more clear, the technical solutions of the present invention are further described below with reference to the accompanying drawings and through specific implementation methods.

[0028] In the description of the present invention, unless otherwise expressly specified or limited, the terms "connected," "connected," and "fixed" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention in specific circumstances.

[0029] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Furthermore, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0030] 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", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship 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 operate in a specific orientation, and therefore cannot be understood as limiting the present invention. In the description of the present invention, unless otherwise specified, "multiple" means two or more. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0031] Reference below Figures 1-6 A bridge construction method and a bridge 100 according to an embodiment of the present invention are described.

[0032] like Figures 1-6 As shown, Figure 1 A bridge construction method is disclosed. The bridge 100 includes a main beam 10 and an arch rib 20. The arch rib 20 is arched on the main beam 10. Both ends of the arch rib 20 are respectively fixed to a first end 11 and a second end 12 of the main beam 10. The method includes:

[0033] like Figure 2As shown, temporary end braces 31 are respectively provided at the first end 11 and the second end 12 and at both ends of the arch rib 20, the middle portion of the main beam 10 and the middle portion of the arch rib 20 are connected by a middle temporary brace 32, and in the area between the end portion of the main beam 10 and the middle portion of the main beam 10, the main beam 10 and the arch rib 20 are connected by a plurality of dispersed temporary braces 33 spaced apart along the length direction of the main beam 10;

[0034] like Figure 3 As shown, at the middle temporary support 32, a hanger 40 is tensioned between the main beam 10 and the arch rib 20;

[0035] like Figure 4 As shown, the hanger 40 is tensioned between the main beam 10 and the arch rib 20 in the middle area between the first end 11 and the middle part of the main beam 10 and the middle area between the second end 12 and the middle part of the main beam 10;

[0036] like Figure 5 As shown, at the two end temporary supports 31, the hanger 40 is tensioned between the main beam 10 and the arch rib 20 at the same time;

[0037] like Figure 6 As shown, from the middle of the main beam 10 toward the first end 11 and the second end 12, the hangers 40 are tensioned between the main beam 10 and the arch rib 20 at three dispersed temporary struts 33 in sequence, and the positions of the three dispersed temporary struts 33 are respectively the area to be constructed closest to the middle temporary strut 32, the area to be constructed closest to the dispersed temporary strut 33 in the middle area, and the area to be constructed closest to the end temporary strut 31, until all the hangers 40 are tensioned between the main beam 10 and the arch rib 20.

[0038] It can be understood that the main beam 10 and the arch rib 20 are connected by two temporary struts 31 at the ends and the temporary struts 32 in the middle, so that the bridge 100 can form a relatively stable load-bearing structure. At the same time, since the two ends of the main beam 10 and the arch rib 20 are respectively fixed on other structures, the load on the first end 11 and the second end 12 of the bridge 100 is relatively stable. Therefore, the hanger 40 is first tensioned from the middle of the main beam 10, and then the hanger 40 is tensioned from the two middle areas, and finally the hanger 40 is tensioned at the first end 11 and the second end 12. This can improve the structural stability of the bridge 100 when the hanger 40 is tensioned.

[0039] Furthermore, when simultaneously tensioning the hangers 40 in the two middle regions, at the first end 11 and the second end 12, in the area to be constructed of the dispersed temporary struts 33 closest to the middle region, and in the area to be constructed of the temporary struts 31 closest to the end regions, since these locations are symmetrical relative to the middle portion of the main beam 10, the simultaneous tensioning of the hangers 40 can also prevent the problem of unbalanced force on one side of the bridge 100 where the main beam 10 and the arch rib 20 are connected by the hangers 40, thereby further improving the structural stability of the bridge 100. Furthermore, by sequentially tensioning the hangers 40 from the middle portion of the main beam 10 toward the first end 11 and the second end 12, the hangers 40 can be tensioned first in the middle region, where the structural stability is relatively poor, which can also improve the structural stability of the bridge 100.

[0040] Therefore, the bridge construction method according to the embodiment of the present invention can ensure that the forces between the arch rib 20, the main beam 10 and the hanger 40 are more uniform during the tensioning process of the hanger 40, thereby improving the overall structural stability of the bridge 100.

[0041] It should be noted that the bridge construction method of the embodiment of the present invention is applicable to a bridge 100 in the form of a large-span mesh hanger 40 arch bridge. Due to its large span, the use of existing parallel hangers 40 cannot meet the requirements of force uniformity and structural stability.

[0042] In some embodiments, the hanger 40 includes two crossed hanging portions. When the hanger 40 is tensioned between the main beam 10 and the arch rib 20 , the two hanging portions are tensioned simultaneously.

[0043] It can be understood that the cross-arrangement of the two hanging parts can enable multiple hangers 40 to form a network structure between the main beam 10 and the arch rib 20, so as to further improve the force uniformity between the arch rib 20, the main beam 10 and the hangers 40, and improve the overall structural stability of the bridge 100.

[0044] In some embodiments, the acute angle between the length direction of the hanging portion and the length direction of the main beam 10 is α, and 55°≤α≤65°.

[0045] It is understandable that when α is too small or too large, a good mesh structure cannot be formed to improve the force uniformity among the arch ribs 20 , the main beams 10 and the hangers 40 .

[0046] In some embodiments, before tensioning the hanger 40 , the end temporary struts 31 , the middle temporary struts 32 or the dispersed temporary struts 33 corresponding to the hanger 40 are first removed.

[0047] It is understandable that the end temporary struts 31 , the middle temporary struts 32 or the dispersed temporary struts 33 will interfere with the tensioning of the hanger 40 , and therefore they must be removed first to ensure smooth tensioning of the hanger 40 .

[0048] In some embodiments, the two end temporary struts 31 or the two dispersed temporary struts 33 located on both sides of the middle temporary strut 32 are removed in sequence.

[0049] It can be understood that the above-mentioned demolition sequence can help improve the construction efficiency of the bridge 100. In other embodiments of the present invention, according to actual construction requirements, the two end temporary struts 31 or the two dispersed temporary struts 33 can also be demolished at the same time. The embodiments of the present invention do not specifically limit this.

[0050] In some embodiments, before tensioning the hangers 40 , all the hangers 40 are installed between the main beam 10 and the arch rib 20 and are placed in a relaxed state.

[0051] It can be understood that by pre-installing the hanger 40 and placing the hanger 40 in a relaxed state, the construction efficiency of the bridge 100 can be significantly improved.

[0052] In some embodiments, after the arch rib 20 and the main beam 10 are connected by the end temporary struts 31 , the middle temporary struts 32 and the dispersed temporary struts 33 , all the hangers 40 are installed between the main beam 10 and the arch rib 20 .

[0053] It can be understood that after the arch rib 20 and the main beam 10 are connected by the end temporary struts 31, the middle temporary struts 32 and the dispersed temporary struts 33, a more stable connection structure can be formed between the main beam 10 and the arch rib 20, thereby facilitating the installation of the loose hanger 40 to improve the subsequent tensioning efficiency of the hanger 40.

[0054] In some embodiments, when tensioning the suspender rods 40 in the middle area and the area to be constructed of the dispersed temporary support rods 33 closest to the middle area, only one suspender rod 40 is tensioned.

[0055] It is understandable that a single hanger 40 can better ensure uniform force on both sides of the middle portion of the bridge 100. Of course, in other embodiments of the present invention, multiple hangers 40 can also be tensioned simultaneously.

[0056] like Figure 6 As shown, the present invention further discloses a bridge 100 constructed using the bridge construction method described above. Bridge 100 includes a main beam 10, an arch rib 20, and a plurality of hangers 40. The arch rib 20 is arched on the main beam 10, with both ends of the arch rib 20 fixedly connected to both ends of the bridge 100. The ends of the plurality of hangers 40 are respectively connected to the main beam 10 and the arch rib 20, and the plurality of hangers 40 are distributed along the length of the main beam 10.

[0057] The bridge 100 according to the embodiment of the present invention adopts the bridge construction method described above, which can improve the force uniformity of the bridge 100, thereby improving the structural stability, safety and life of the bridge 100.

[0058] In some embodiments, as Figure 6 As shown, the boom 40 is a mesh structure.

[0059] It can be understood that the mesh structure has better load-bearing capacity, thereby being able to improve the structural stability and safety of the long-span bridge 100 .

[0060] Throughout this specification, references to "some embodiments," "other embodiments," and the like indicate that the specific features, structures, materials, or characteristics described in connection with that embodiment or example are included in at least one embodiment or example of the present invention. In this specification, schematic representations of these terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0061] The above contents are only preferred embodiments of the present invention. For ordinary technicians in this field, according to the concept of the present invention, there may be changes in the specific implementation methods and application scopes. The contents of this specification should not be understood as limiting the present invention.

Claims

1. A method for constructing a bridge, wherein the bridge comprises a main beam and an arch rib, wherein the arch rib is provided on the main beam, and both ends of the arch rib are respectively fixedly connected to a first end and a second end of the main beam, wherein: include: Temporary end braces are respectively provided at the first end, the second end and both ends of the arch rib, the middle portion of the main beam and the middle portion of the arch rib are connected by a temporary middle brace, and in the area between the end portion of the main beam and the middle portion of the main beam, the main beam and the arch rib are connected by a plurality of dispersed temporary braces spaced apart along the length direction of the main beam; At the temporary support rod in the middle, a suspender rod is tensioned between the main beam and the arch rib; tensioning the hanger rods between the main beam and the arch ribs in a middle region between the first end and the middle portion of the main beam, and in a middle region between the second end and the middle portion of the main beam; At the two temporary end supports, the suspender rod is simultaneously tensioned between the main beam and the arch rib; From the middle of the main beam toward the first end and the second end, the hangers are tensioned between the main beam and the arch rib at the three dispersed temporary struts in sequence, and the positions of the three dispersed temporary struts are respectively the area to be constructed closest to the middle temporary strut, the area to be constructed closest to the middle area of ​​the dispersed temporary struts, and the area to be constructed closest to the end temporary struts, until all the hangers are tensioned between the main beam and the arch rib; Before tensioning the hanger, first remove the temporary end struts, the temporary middle struts and the dispersed temporary struts corresponding to the hanger.

2. The bridge construction method according to claim 1, characterized in that: The suspension rod comprises two crossed suspension connecting parts. When the suspension rod is tensioned between the main beam and the arch rib, the two suspension connecting parts are tensioned simultaneously.

3. The bridge construction method according to claim 2, characterized in that: An acute angle α between the length direction of the hanging portion and the length direction of the main beam is 55°≤α≤65°.

4. The bridge construction method according to claim 1, characterized in that: The two end temporary struts and the two dispersed temporary struts located on both sides of the middle temporary strut are removed in sequence.

5. The bridge construction method according to claim 1, characterized in that: Before tensioning the hangers, all the hangers are installed between the main beam and the arch ribs, and all the hangers are placed in a relaxed state.

6. The bridge construction method according to claim 5, characterized in that: After the arch rib and the main beam are connected by the end temporary struts, the middle temporary struts and the dispersed temporary struts, all the hangers are installed between the main beam and the arch rib.

7. The bridge construction method according to claim 1, characterized in that: When the suspension rods are tensioned in the middle area and the area to be constructed of the dispersed temporary support rods closest to the middle area, only one suspension rod is tensioned.

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