Cross beam structure of cantilever bridge fabrication machine and cantilever bridge fabrication machine

Abstract

The utility model discloses a cross beam structure of a cantilever bridge fabrication machine. A main body of the cross beam structure is a quadrilateral hollow frame formed by sequentially connecting a first side edge, a second side edge, a third side edge and a fourth side edge which are adjacent; wherein the first side edge is detachably provided with a first connecting section, and the two ends of the first connecting section are adjacent to the transition sections respectively; the transition section and / or the first connecting section are / is used for being fixedly connected to front end nodes of a main truss of the cantilever bridge fabrication machine from the two sides in the bridge direction so that the quadrilateral hollow frame can pass through the outer sides of wing plates on the two sides of the beam body when the cantilever bridge fabrication machine retreats. The cross beam structure avoids interference with a prestress tensioning position, so that the tensioning jack is more flexible to take and place, the problem that the front upper cross beam is inconvenient to disassemble when the cantilever bridge fabrication machine retreats is solved, and the operation normalization is improved. The utility model further provides the cantilever bridge fabrication machine.

Description

Technical Field

[0001] The utility model relates to the technical field of hanging basket construction, in particular to a cross beam structure of a cantilever bridge building machine and a cantilever bridge building machine. Background Art

[0002] The cantilever casting construction method refers to a construction method in which, on both sides of the bridge axis with the pier as the center, a special device is used to symmetrically and balancedly pour the concrete beam body towards the mid-span section by section and prestress is applied section by section. A hanging basket is a special device used to bear the self-weight of the beam body and construction loads during the cantilever casting of the concrete beam body and can move forward section by section. The cantilever bridge building machine belongs to a type of hanging basket, and the structural feature of the cantilever bridge building machine is that the main stressed members are located below the beam surface.

[0003] In the existing structure of the cantilever bridge building machine, the front upper cross beam, as the main carrier for transmitting the bottom concrete load during the casting construction, its structural form and size determine the applicable range of the cantilever bridge building machine.

[0004] Currently, the front upper cross beam 100a of the cantilever bridge building machine has the following problems: As shown in Figure 1 and Figure 2 , the structure is huge and the installation position is relatively low. When the casting is completed, the construction space left for the tensioning and prestressing application is too small. The tensioning jack 101a cannot be normally lowered to the designated position and interferes with the prestressing tensioning position 101b. In order to avoid the prestressing tensioning position 101b, it is necessary to adapt the front upper cross beam according to the beam drawing design, which affects the project efficiency; As shown in Figure 3 and Figure 4 , the front upper cross beam 100a is a large component, which is only assembled by splicing two symmetric welded parts. During the retraction process of the cantilever bridge building machine, there is an interference part 103a between the front upper cross beam 100a and the beam body 102a, and the front upper cross beam 100a has to be disassembled. Although it only needs to be disassembled twice, due to its heavy weight, the on-site hoisting difficulty is large, resulting in the inability to disassemble the front upper cross beam 100a more conveniently and labor-savingly in the project. Content of the Utility Model

[0005] In view of this, the utility model provides a cross beam structure of a cantilever bridge building machine and a cantilever bridge building machine, which avoids interference with the prestressing tensioning position, makes the placement and removal of the tensioning jack more flexible, solves the problem of inconvenient disassembly of the front upper cross beam when the cantilever bridge building machine retracts, and improves the operation standardization.

[0006] To achieve the above purpose:

[0007] The present application provides a crossbeam structure for a cantilever bridge construction machine. The main body of the crossbeam structure is a quadrilateral hollow frame formed by sequentially connecting adjacent first side, second side, third side, and fourth side; wherein, the first side is detachably provided with a first connection section, and both ends of the first connection section are adjacent to transition sections respectively; the transition section and / or the first connection section are used to fixedly connect to the front nodes of the main truss of the cantilever bridge construction machine from both sides in the longitudinal direction of the bridge, so that when the cantilever bridge construction machine retreats, the quadrilateral hollow frame passes through from the outside of the wing plates on both sides of the beam body.

[0008] In one embodiment, turning sections are respectively provided at both ends of the second side and the fourth side, so that both sides of the quadrilateral hollow frame are constructed into "C" - shaped members, the third side is provided with a second connection section, and both ends of the "C" - shaped members are respectively detachably connected to the second connection section and the transition section.

[0009] In one embodiment, the thickness of the "C" - shaped member is less than the thickness of the transition section, and a transition slope is provided at one end of the transition section close to the "C" - shaped member.

[0010] In one embodiment, the lengths of the first side and the third side are equal, the lengths of the second side and the fourth side are equal, and the lengths of the first side and the third side are greater than the lengths of the second side and the fourth side.

[0011] In one embodiment, a support assembly is detachably provided between the first side and the third side, and the support assembly is symmetrically arranged with respect to the center line between the second side and the fourth side.

[0012] In one embodiment, the support assembly includes a first support assembly and a second support assembly. The first support assembly is parallel to the second side and the fourth side, the second support assembly intersects the first side and the third side, and both the first support assembly and the second support assembly are symmetrically arranged with respect to the center line between the second side and the fourth side.

[0013] In one embodiment, hinge lugs are respectively provided on the first side and the third side, and both ends of the first support assembly and the second support assembly are respectively hinged to the hinge lugs.

[0014] In one embodiment, porous flange plates for detachably connecting to the main truss are respectively provided at the bottoms of the first connection section and the transition section to adapt to the position change of the main truss.

[0015] In one embodiment, a positioning shaft is provided at the bottom of the transition section, a positioning hole for mating connection with the positioning shaft is provided on the porous flange plate, and the outer dimension of the bottom of the positioning shaft is smaller than that of its top.

[0016] Based on the same concept as the aforementioned utility model, the present application also provides a cantilever bridge building machine, which can be provided with a crossbeam structure such as that of the aforementioned cantilever bridge building machine. Suspender bars are detachably connected at intervals on the first connecting section, and the suspender bars are detachably connected to the first crossbeam of the bottom basket. The bottom basket is located below the beam body, and the second crossbeam of the bottom basket is fixedly connected to the middle part of the main truss through the suspender bars.

[0017] For the crossbeam structure of the cantilever bridge building machine and the cantilever bridge building machine provided by the present application, during pouring, the load of the first crossbeam of the bottom basket, that is, the front crossbeam of the bottom basket, is transmitted to the crossbeam structure of the cantilever bridge building machine, that is, the front upper crossbeam of the cantilever bridge building machine, through the suspender bars. The front upper crossbeam is placed at the front end of the main truss, so as to transmit the load to the main truss. The load of the second crossbeam of the bottom basket, that is, the rear crossbeam of the bottom basket, is directly transmitted to the middle part of the main truss through the suspender bars. At the same time, the main truss is connected to the main hanger through a pin shaft, and the load is transmitted to above the beam surface through the main hanger, steel bars and the rear upper crossbeam. And during the prestress tensioning, since the position of the crossbeam structure of the cantilever bridge building machine provided by the present application rises relative to the front upper crossbeam of the cantilever bridge building machine in the prior art, there is no interference with the prestress tensioning position. At the same time, the overall height of the crossbeam structure of the cantilever bridge building machine provided by the present application is reduced, and it is more flexible to place and remove the tensioning jack. In addition, when the cantilever bridge building machine retreats, since the second connecting section and the support assembly are detachably arranged, only need to remove the support assembly and then directly remove the second connecting section to avoid interference with the cast beam body when the cantilever bridge building machine retreats. The support assembly and the second connecting section are small in size and light in weight, and there is no need for additional large lifting tools for auxiliary removal, which greatly eliminates the safety accidents caused by a series of non-standard on-site operations. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following will briefly introduce the drawings required to be used in the embodiments. It should be understood that the following drawings only show some embodiments of the present utility model, and therefore should not be regarded as limiting the scope. For those of ordinary skill in the art, without creative efforts, other related drawings can also be obtained based on these drawings.

[0019] Figure 1 Schematically shows the side view structure of the cantilever bridge building machine in the prior art;

[0020] Figure 2 Schematically shows the front view structure of the cantilever bridge building machine in the prior art;

[0021] Figure 3 and Figure 4 Schematically shows the retreat process of the cantilever bridge building machine in the prior art;

[0022] Figure 5Schematically shows the front view structure of the crossbeam structure of the cantilever bridge building machine according to an embodiment of the present application.

[0023] Figure 6 Schematically shows the front view structure of the cantilever bridge building machine according to an embodiment of the present application.

[0024] Figure 7 Schematically shows Figure 6 the first partial structure of part A.

[0025] Figure 8 Schematically shows Figure 6 the second partial structure of part A.

[0026] Figure 9 Schematically shows Figure 6 the third partial structure of part A.

[0027] Figure 10 Schematically shows the side view structure of the cantilever bridge building machine according to an embodiment of the present application.

[0028] Figure 11 Schematically shows the arrangement position of the tensioning jack on the cantilever bridge building machine according to an embodiment of the present application.

[0029] Figure 12 Schematically shows the prestress tensioning position of the cantilever bridge building machine according to an embodiment of the present application.

[0030] Figure 13 Schematically shows the disassembly process of the crossbeam structure of the cantilever bridge building machine according to an embodiment of the present application. Detailed implementation manners

[0031] Next, specific embodiments of the present utility model will be described in detail in conjunction with the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the description of the present utility model without creative efforts shall fall within the scope of protection of the present utility model.

[0032] In the description of the present utility model, unless otherwise clearly defined and limited, terms such as "set", "provided with", "arranged on", "installed", "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, a direct connection, or an indirect connection through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms can be understood according to specific circumstances.

[0033] The orientation or positional relationship indicated by terms such as "front end", "upper", "lower", "front", "rear", "outer side", "middle", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the utility model product is customarily placed during use. It is only for the convenience of description and simplification of 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 on the present utility model.

[0034] In the description of the present utility model, unless otherwise clearly specified and limited, terms such as "first", "second", "third", and "fourth" are only used to distinguish elements with similar attributes, rather than indicating or implying relative importance or a specific order.

[0035] The term "comprising" or any other variant thereof is intended to cover non-exclusive inclusion. In addition to including those listed elements, it may also include other elements not specifically listed.

[0036] As Figure 5 and Figure 6 shown, the crossbeam structure of the cantilever bridge building machine in the embodiment of the present application, that is, the front upper crossbeam of the cantilever bridge building machine, the main body of the crossbeam structure is a quadrilateral hollow frame 10 formed by sequentially connecting adjacent first side 11, second side 12, third side 13, and fourth side 14; wherein, the first side 11 is detachably provided with a first connection section 112, and both ends of the first connection section 112 are adjacent to transition sections 114; the transition sections 114 are used to fixedly connect to the front end of the main truss 101 of the cantilever bridge building machine from both sides in the bridge longitudinal direction, so that when the cantilever bridge building machine retreats, the quadrilateral hollow frame 10 passes through from the outside of the wing plates 103 on both sides of the beam body 102. Specifically, the front upper crossbeam of the cantilever bridge building machine is set as the quadrilateral hollow frame 10, with a simple structure and easy to process and manufacture. The first side 11, the second side 12, the third side 13, and the fourth side 14 can all be rod-shaped structures, and the first connection section 112 can be a crossbar structure, with a simple structure and small size, so that the installation and disassembly of the first connection section 112 are simple and convenient.

[0037] In one embodiment, turning sections 124 are respectively provided at both ends of the second side 12 and the fourth side 14, so that both sides of the quadrilateral hollow frame 10 are constructed into "C" - shaped members 122. The third side 13 is provided with a second connection section 132, and both ends of the "C" - shaped member 122 are respectively detachably connected to the second connection section 132 and the transition section 114. Specifically, by further setting the front upper cross - beam of the cantilever bridge - building machine as multiple detachable members, it is convenient for the overall installation and disassembly of the front upper cross - beam, and at the same time, it is also convenient for transportation. Moreover, through the setting of the "C" - shaped member 122 and the transition section 114, the structural strength of the entire front upper cross - beam is greatly improved, ensuring that it can be stably and reliably placed on the front node of the main truss 101. It is easy to understand that in some embodiments not shown, in the quadrilateral hollow frame 10, the "C" - shaped member 122, the second connection section 132, and the transition section 114 can also be of an integrally formed structure.

[0038] In one embodiment, the thickness of the "C" - shaped member 122 is less than the thickness of the transition section 114, and a transition slope 116 is provided at one end of the transition section 114 close to the "C" - shaped member 122. Specifically, since the transition section 114 needs to be the main stress - bearing part for the connection between the front upper cross - beam and the main truss 101, the thickness of the transition section 114 can be set thicker to improve the overall structural strength and stiffness of the front upper cross - beam. And by providing a transition slope 116 at one end of the transition section 114 close to the "C" - shaped member 122, the stress concentration problem caused by the sudden increase in thickness at the connection between the transition section 114 and the "C" - shaped member 122 can be avoided.

[0039] In one embodiment, the lengths of the first side 11 and the third side 13 are equal, the lengths of the second side 12 and the fourth side 14 are equal, and the lengths of the first side 11 and the third side 13 are greater than the lengths of the second side 12 and the fourth side 14. Specifically, the overall structure of the front upper cross - beam can be constructed as a quadrilateral hollow frame 10 similar to a rectangle, which can reduce the overall height of the front upper cross - beam as much as possible, thus making it more flexible to place and remove the prestressed tensioning jack.

[0040] In one embodiment, a support assembly 20 is detachably provided between the first side 11 and the third side 13, and the support assembly 20 is symmetrically arranged with respect to the center line between the second side 12 and the fourth side 14. Specifically, by symmetrically adding a detachable support assembly 20 inside the quadrilateral hollow frame 10, the overall stiffness of the front upper cross - beam of the cantilever bridge - building machine can be greatly improved, reducing the deformation during use, and ensuring a stable and reliable connection with the bottom basket 106.

[0041] In one embodiment, the support assembly 20 includes a first support assembly 21 and a second support assembly 22. The first support assembly 21 is parallel to the second side 12 and the fourth side 14, and the second support assembly 22 intersects the first side 11 and the third side 13. Both the first support assembly 21 and the second support assembly 22 are symmetrically arranged relative to the center line between the second side 12 and the fourth side 14. Hinge seats 23 are respectively provided on the first side 11 and the third side 13, and both ends of the first support assembly 21 and the second support assembly 22 are respectively hinged to the hinge seats 23. The first support assembly 21 and the second support assembly 22 are one or several of struts, telescopic rods, hydraulic cylinders, electric cylinders, and air cylinders, with a simple and compact structure, easy to install and arrange, and convenient to operate. Specifically, by symmetrically arranging two sets of vertical first support assemblies 21 and two sets of obliquely supporting second support assemblies 22 within the quadrilateral hollow frame 10 respectively, both ends of the first support assembly 21 are respectively hinged to the second connection section 132 and the transition section 114 through the hinge seats 23, and the second support assembly 22 is respectively hinged to the first connection section 112 and the second connection section 132 through the hinge seats 23. In this way, the supporting forces of the first support assemblies 21 and the second support assemblies 22 can be evenly distributed on the entire quadrilateral hollow frame 10, and the structure is simple and compact, easy to install and arrange.

[0042] As Figure 7 and Figure 8 shown, in one embodiment, porous flange plates 104 for detachably connecting to the main truss 101 are provided at the bottoms of the first connection section 112 and the transition section 114 to adapt to the position change of the main truss 101. Specifically, by further arranging the porous flange plates 104 at the bottoms of the first connection section 112 and the transition section 114, the position change of the main truss 101 can be effectively adapted when the beam types are different.

[0043] As Figure 9 shown, in one embodiment, a positioning shaft 1142 is provided at the bottom of the transition section 114, and a positioning hole 1041 for mating connection with the positioning shaft 1142 is provided on the porous flange plate 104. The outer dimension of the bottom of the positioning shaft 1142 is smaller than that of its top. Specifically, through the mating positioning of the positioning shaft 1142 and the positioning hole 1041, the positioning and installation of the crossbeam structure of the cantilever bridge building machine between the main truss 101 can be simple, convenient, stable, and reliable. During the assembly process, the clearance fit formed in advance between the bottom with a smaller outer dimension of the positioning shaft 1142 and the positioning hole 1041 can also be used to realize the guiding and positioning during the installation process of the crossbeam structure of the cantilever bridge building machine, so that the crossbeam structure of the cantilever bridge building machine can be more conveniently installed on the main truss 101. Specifically, a chamfered corner structure and multiple sections of chamfer structures can be provided at the bottom end of the positioning shaft 1142.

[0044] Based on the same concept as the foregoing embodiments, an embodiment of the present application further provides a cantilever bridge erector, which may be provided with a crossbeam structure of the cantilever bridge erector as in the foregoing embodiments; suspension rods 105 are detachably connected at intervals on the first connection section 112, and the suspension rods 105 are detachably connected to the first crossbeam 107 of the bottom basket 106. The bottom basket 106 is located below the beam body 102, and the second crossbeam 108 of the bottom basket 106 is fixedly connected to the middle part of the main truss 101 through the suspension rods 105.

[0045] As Figures 10 to 13 shown, for the crossbeam structure of the cantilever bridge erector and the cantilever bridge erector provided in the embodiment of the present application, during pouring, the first crossbeam 107 of the bottom basket 106, that is, the load of the front crossbeam of the bottom basket 106, is transmitted to the crossbeam structure of the cantilever bridge erector through the suspension rods 105, that is, to the front upper crossbeam of the cantilever bridge erector. The front upper crossbeam is placed at the front end of the main truss 101, so as to transmit the load to the main truss 101. The second crossbeam 108 of the bottom basket 106, that is, the load of the rear crossbeam of the bottom basket 106, is directly transmitted to the middle part of the main truss 101 through the suspension rods 105. At the same time, the main truss 101 is connected to the main hanger 108 through a pin shaft, and the load is transmitted above the beam surface through the main hanger 109, steel bars and the rear upper crossbeam 110. And during prestress tensioning, since the position of the crossbeam structure of the cantilever bridge erector provided in the embodiment of the present application rises relative to the front upper crossbeam of the cantilever bridge erector in the prior art and there is no interference with the prestress tensioning position 1021, and at the same time, the overall height of the crossbeam structure of the cantilever bridge erector provided in the present application is reduced, making it more flexible to place and remove the tensioning jack 1022. In addition, when the cantilever bridge erector retreats, since the second connection section 132 and the support assembly 20 are detachably arranged, only after the support assembly 20 is removed and then the second connection section 132 is directly removed, it is possible to avoid interference with the already poured beam body when the cantilever bridge erector retreats. The support assembly 20 and the second connection section 132 are small in size and light in weight, and no additional large lifting tools are required for auxiliary removal, greatly eliminating safety accidents caused by a series of non-standard on-site operations.

[0046] According to the above embodiments, it can be seen that for the crossbeam structure of the cantilever bridge erector and the cantilever bridge erector involved in the present application, interference with the prestress tensioning position is avoided, making it more flexible to place and remove the tensioning jack, solving the problem of inconvenient disassembly of the front upper crossbeam when the cantilever bridge erector retreats, and improving the operation standardization.

[0047] The above is only the specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily obtained by those skilled in the art within the technical scope disclosed by the present invention should be covered by the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. A crossbeam structure of a cantilever bridge-building machine, characterized in that: The main body of the crossbeam structure is a quadrilateral hollow frame (10) formed by sequentially connecting adjacent first side edges (11), second side edges (12), third side edges (13) and fourth side edges (14); wherein: The first side edge (11) is detachably provided with a first connecting section (112), and two ends of the first connecting section (112) are respectively adjacent to the transition section (114); The transition section (114) and / or the first connection section (112) are used to be fixedly connected to the front end of the main truss (101) of the cantilever bridge-building machine from both sides along the bridge direction, so that when the cantilever bridge-building machine moves backward, the quadrilateral hollow frame (10) passes through the outside of the wing plates (103) on both sides of the beam body (102).

2. The crossbeam structure of the cantilever bridge-building machine according to claim 1 is characterized in that: The second side (12) and the fourth side (14) are respectively provided with turning sections (124) at both ends, so that the two sides of the quadrilateral hollow frame (10) are constructed into a "C"-shaped component (122); the third side (13) is provided with a second connecting section (132); and the two ends of the "C"-shaped component (122) are respectively detachably connected to the second connecting section (132) and the transition section (114).

3. The crossbeam structure of the cantilever bridge-building machine according to claim 2 is characterized in that: The thickness of the "C"-shaped component (122) is smaller than the thickness of the transition section (114), and a transition slope (116) is provided at one end of the transition section (114) close to the "C"-shaped component (122).

4. The crossbeam structure of the cantilever bridge-building machine according to any one of claims 1 to 3, characterized in that: The first side (11) and the third side (13) are of equal length, the second side (12) and the fourth side (14) are of equal length, and the length of the first side (11) and the third side (13) is greater than the length of the second side (12) and the fourth side (14).

5. The crossbeam structure of the cantilever bridge-building machine according to any one of claims 1 to 3, characterized in that: A support assembly (20) is detachably provided between the first side edge (11) and the third side edge (13), and the support assembly (20) is symmetrically arranged relative to a center line between the second side edge (12) and the fourth side edge (14).

6. The crossbeam structure of the cantilever bridge-building machine according to claim 5, characterized in that: The support assembly (20) comprises a first support assembly (21) and a second support assembly (22); the first support assembly (21) is parallel to the second side edge (12) and the fourth side edge (14); the second support assembly (22) intersects the first side edge (11) and the third side edge (13); and the first support assembly (21) and the second support assembly (22) are both symmetrically arranged relative to a center line between the second side edge (12) and the fourth side edge (14).

7. The crossbeam structure of the cantilever bridge-building machine according to claim 6, characterized in that: The first side edge (11) and the third side edge (13) are respectively provided with hinged ear seats (23), and both ends of the first support assembly (21) and the second support assembly (22) are respectively hinged to the hinged ear seats (23).

8. The crossbeam structure of a cantilever bridge-building machine according to any one of claims 1 to 3, characterized in that: The bottoms of the first connecting section (112) and the transition section (114) are both provided with a porous flange plate (104) for detachably connecting the main truss (101) to accommodate changes in the position of the main truss (101).

9. The crossbeam structure of the cantilever bridge-building machine according to claim 8, characterized in that: A positioning shaft (1142) is provided at the bottom of the transition section (114), and a positioning hole (1041) is provided on the porous flange plate (104) for cooperation with the positioning shaft (1142). The outer dimensions of the bottom of the positioning shaft (1142) are smaller than the outer dimensions of the top thereof.

10. A cantilever bridge-building machine, characterized in that: The cantilever bridge-building machine is provided with a crossbeam structure of a cantilever bridge-building machine as claimed in any one of claims 1 to 9; a suspension rod (105) is detachably connected to the first connecting section (112) at intervals, and the suspension rod (105) is detachably connected to a first crossbeam (107) of a bottom basket (106); the bottom basket (106) is located below the beam body (102); and the second crossbeam (108) of the bottom basket (106) is fixedly connected to the middle part of the main truss (101) through the suspension rod (105).

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