Cantilever ballasting mechanism for steel truss girder

Abstract

The utility model relates to a cantilever ballasting mechanism for a steel truss girder, and relates to the technical field of bridge construction auxiliary structures, the cantilever ballasting mechanism comprises a cantilever structure, the cantilever structure is used for being arranged on the steel truss girder and comprises an upper beam body, a lower beam body and a supporting assembly, the upper beam body and the lower beam body are arranged in a spaced mode, and the supporting assembly is arranged between the upper beam body and the lower beam body; and the two additional bearing assemblies are used for being arranged on the two sides of the lower beam body correspondingly and located at the ends of the lower beam body, and the additional bearing assemblies are used for being provided with second balancing weights. As the first balancing weight is arranged on the upper beam body and the second balancing weight is arranged on the additional bearing components on the two sides of the lower beam body, the weight range of the bridge floor is reduced or eliminated, the weight arm of the bridge floor is increased, and the problem that in the prior art, due to the fact that the bridge floor space and the bridge floor strength are limited, a bridge floor construction channel is reserved for reducing the bridge floor pressure is solved. The range of the weight of the bridge floor needs to be increased, a weight arm is reduced in a disguised manner, and the efficiency of weight conversion anti-overturning moment is reduced.

Description

Technical Field

[0001] This utility model relates to the field of auxiliary structure technology for bridge construction, specifically to a cantilever counterweight mechanism for steel truss beams. Background Technology

[0002] The erection of steel truss arches / steel trusses is generally carried out using cantilever erection. During construction, the overturning moment of the steel truss arches / steel trusses due to their own weight and construction loads is often greater than the anti-overturning moment generated by their own weight. Therefore, measures need to be taken at the side span steel beams to increase the anti-overturning moment in order to meet the requirement of an anti-overturning stability coefficient of 1.3.

[0003] In the existing technology, the anti-overturning moment is generally increased by using side span counterweights during the erection of steel truss arches / steel truss beams. That is, the anti-overturning moment is increased by setting counterweights at the side span bridge deck to meet the requirements of the anti-overturning stability coefficient.

[0004] However, due to the limited space and strength of the bridge deck, in order to reduce the pressure on the bridge deck and leave room for construction, it is necessary to increase the range of bridge deck weight, which indirectly reduces the weight arm and lowers the efficiency of weight conversion to anti-overturning moment. Utility Model Content

[0005] This application provides a cantilever counterweight mechanism for steel trusses, which can solve the problem in the prior art that due to the limited space and strength of the bridge deck, in order to reduce the pressure on the bridge deck and leave room for bridge deck construction, it is necessary to increase the range of bridge deck counterweight, which indirectly reduces the counterweight lever arm and reduces the efficiency of counterweight conversion to anti-overturning moment.

[0006] In a first aspect, embodiments of this application provide a cantilever counterweight mechanism for steel truss beams, comprising:

[0007] A cantilever structure for mounting on a steel truss includes an upper beam and a lower beam spaced apart, and a support assembly disposed between the upper beam and the lower beam, wherein the upper beam is used to mount a first counterweight.

[0008] Two additional load-bearing components are respectively disposed on both sides of the lower beam and located at the ends of the lower beam. The additional load-bearing components are used to set the second counterweight.

[0009] In conjunction with the first aspect, in one implementation, the additional carrier component includes:

[0010] A secondary truss member, one end of which is used to connect to one side of the lower beam, is used to mount the second counterweight;

[0011] The secondary truss diagonal member has one end located on the outside of the secondary truss chord and the other end connected to the upper beam.

[0012] In conjunction with the first aspect, in one embodiment, the upper beam portion extends outward in a second direction into the vertical projection range of the lower beam, and the first counterweight portion extends into the vertical projection range of the lower beam.

[0013] In conjunction with the first aspect, in one embodiment, the support assembly includes two sets of vertical support units spaced apart along a first direction, the two sets of vertical support units being respectively disposed on both sides of the lower beam, the vertical support unit comprising:

[0014] Multiple vertical struts are spaced apart along a second direction, and the vertical struts are located on one side of the lower beam and connected to the upper beam at their upper ends;

[0015] An oblique strut, one end of which is used to connect to the end of the lower beam, and the other end of which is connected to the end of the upper beam that extends beyond the vertical projection range of the lower beam.

[0016] In conjunction with the first aspect, in one embodiment, an oblique reinforcing rod is further provided between two adjacent vertical struts, and the two ends of the oblique reinforcing rod are respectively connected to the opposite ends of the two vertical struts.

[0017] In conjunction with the first aspect, in one embodiment, it further includes two first connecting plates, which are spaced apart on both sides of the end of the lower beam along a first direction. The first connecting plates are provided with three-way connecting ports with upward openings, which are respectively used to connect the diagonal strut, the vertical strut, and the diagonal reinforcing rod.

[0018] In conjunction with the first aspect, in one embodiment, a plurality of second connecting plates are further included. The second connecting plates are used to be disposed on the upper beam or the lower beam. The second connecting plates are provided with three-way connecting ports, which are respectively used to connect the vertical strut and the diagonal reinforcing rods on both sides of the vertical strut.

[0019] In conjunction with the first aspect, in one embodiment, the upper beam body includes:

[0020] Two upper chords of load-bearing beams are spaced apart along a first direction. The upper chords of the load-bearing beams are arranged along a second direction and partially extend into the vertical projection range of the lower beam in the second direction. The first counterweight block is arranged on the upper chords of the load-bearing beams.

[0021] Multiple connecting beams are spaced apart along a second direction, with each end of the connecting beam connected to the upper chord of one of the two load-bearing beams. The connecting beams are located at the connection between the vertical strut and the upper chord of the load-bearing beam.

[0022] In conjunction with the first aspect, in one embodiment, the upper beam is further provided with a placement structure, the placement structure including a plurality of distribution beams spaced apart along a second direction, the distribution beams being arranged along a first direction, and both ends being connected to the upper chords of the two bearing beams respectively, the distribution beams being used to place the first counterweight block.

[0023] In conjunction with the first aspect, in one embodiment, the additional load-bearing component is detachably connected to the lower beam.

[0024] The beneficial effects of the technical solutions provided in this application include:

[0025] When using this cantilever counterweight mechanism for steel trusses, the support components, upper beam, and lower beam are first spliced ​​with the steel truss. A first counterweight is installed on the upper beam. Then, two additional load-bearing components are respectively installed on both sides of the lower beam at its ends. A second counterweight is installed on the additional load-bearing components. Because the first counterweight is installed on the upper beam and the second counterweight is installed on the additional load-bearing components on both sides of the lower beam, the range of bridge deck counterweight is reduced or eliminated, and the counterweight lever arm is increased. This solves the problem in the prior art where, due to the limited space and strength of the bridge deck, in order to reduce bridge deck pressure and leave room for bridge deck construction, it is necessary to increase the range of bridge deck counterweight, which indirectly reduces the counterweight lever arm and lowers the efficiency of counterweight conversion to anti-overturning moment. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 This is a side view of an embodiment of the cantilever counterweight mechanism for steel trusses of this utility model, without additional load-bearing components.

[0028] Figure 2 This is a structural schematic diagram of section 1-1 in an embodiment of the cantilever counterweight mechanism for steel trusses of this utility model.

[0029] Figure 3 This is a schematic diagram of the structure of the second connecting plate in an embodiment of a cantilever counterweight mechanism for steel trusses according to the present invention.

[0030] Figure 4 This is a schematic diagram of the structure of the first connecting plate in an embodiment of a cantilever counterweight mechanism for steel trusses according to the present invention.

[0031] In the diagram: 1. Cantilever structure; 11. Support assembly; 111. Vertical strut; 112. Diagonal strut; 113. Diagonal reinforcement rod; 12. Upper beam; 121. Upper chord of the load-bearing beam; 122. Connecting beam; 13. Lower beam; 3. First counterweight; 4. Additional load-bearing assembly; 41. Secondary truss chord; 42. Secondary truss diagonal member; 5. Second counterweight; 6. First connecting plate; 7. Second connecting plate; 8. Placement structure; 81. Distribution beam. Detailed Implementation

[0032] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present application.

[0033] This application provides a cantilever counterweight mechanism for steel trusses, which solves the problem in the prior art where, due to the limited space and strength of the bridge deck, the range of bridge deck counterweight needs to be increased in order to reduce bridge deck pressure and leave room for bridge deck construction. This results in a disguised reduction of the counterweight lever arm and a decrease in the efficiency of counterweight conversion to anti-overturning moment.

[0034] like Figure 1 and Figure 2 As shown, this application provides a cantilever counterweight mechanism for steel truss beams, comprising:

[0035] The cantilever structure 1 is used to be installed on a steel truss beam, including an upper beam 12 and a lower beam 13 spaced apart, and a support assembly 11 disposed between the upper beam 12 and the lower beam 13. The upper beam 12 is used to install the first counterweight 3.

[0036] Two additional load-bearing components 4 are respectively installed on both sides of the lower beam 13 and located at the ends of the lower beam 13. The additional load-bearing components 4 are used to install the second counterweight 5.

[0037] When using the cantilever counterweight mechanism for steel trusses, the support assembly 11, upper beam 12, and lower beam 13 are first spliced ​​with the steel truss. A first counterweight block 3 is installed on the upper beam 12. Then, two additional load-bearing assemblies 4 are respectively installed on both sides of the lower beam 13 at its ends. A second counterweight block 5 is installed on the additional load-bearing assemblies 4. Since the first counterweight block 3 is installed on the upper beam 12 and the second counterweight block 5 is installed on the additional load-bearing assemblies 4 on both sides of the lower beam 13, the range of bridge deck counterweight is reduced or eliminated, and the counterweight lever arm is increased. This solves the problem in the prior art where, due to the limited space and strength of the bridge deck, in order to reduce bridge deck pressure and leave room for bridge deck construction, it is necessary to increase the range of bridge deck counterweight, which indirectly reduces the counterweight lever arm and lowers the efficiency of counterweight conversion to anti-overturning moment.

[0038] like Figure 2 As shown, in some optional embodiments, the additional carrier component 4 includes:

[0039] The secondary truss member 41 has one end for connecting to one side of the lower beam 13 and for setting the second counterweight 5;

[0040] The secondary truss diagonal member 42 has one end located on the outside of the secondary truss chord member 41, and the other end connected to the upper beam 12.

[0041] In this embodiment, the structure of the additional load-bearing component 4 is specifically described. The additional load-bearing component 4 includes a secondary truss 41 and a secondary truss diagonal member 42. One end of the secondary truss 41 is used to connect to one side of the lower beam 13 and to set the second counterweight 5. One end of the secondary truss diagonal member 42 is set on the outside of the secondary truss 41, and the other end is connected to the upper beam 12. The structure is simple, easy to manufacture, and easy to install.

[0042] like Figure 1 As shown, in some optional embodiments, the upper beam 12 extends out of the vertical projection range of the lower beam 13 in the second direction, and the first counterweight 3 extends into the vertical projection range of the lower beam 13.

[0043] In this embodiment, the upper beam 12 extends outward in the second direction into the vertical projection range of the lower beam 13. The first counterweight 3 is disposed on the upper beam 12 and extends into the vertical projection range of the lower beam 13, which further increases the counterweight arm and improves the efficiency of counterweight conversion to anti-overturning moment.

[0044] like Figure 1 and Figure 2 As shown, in some optional embodiments, the support assembly 11 includes two sets of vertical support units spaced apart along a first direction. The two sets of vertical support units are respectively used to be installed on both sides of the lower beam 13. The vertical support units include:

[0045] Multiple vertical struts 111 are spaced apart along the second direction. The vertical struts 111 are located on one side of the lower beam 13 and their upper ends are connected to the upper beam 12.

[0046] The diagonal strut 112 has one end connected to the end of the lower beam 13 and the other end connected to the end of the upper beam 12 that extends beyond the vertical projection range of the lower beam 13.

[0047] In this embodiment, the structure of the support assembly 11 is specifically described. The support assembly 11 includes two sets of vertical support units spaced apart along a first direction. The two sets of vertical support units are respectively used to be installed on both sides of the lower beam 13. The vertical support unit includes an inclined strut 112 and multiple vertical struts 111. The multiple vertical struts 111 are spaced apart along a second direction on one side of the lower beam 13, and their upper ends are connected to the upper beam 12. One end of the inclined strut 112 is used to connect to the end of the lower beam 13, and the other end is connected to the end of the upper beam 12 that extends out of the vertical projection range of the lower beam 13. The structure is simple, easy to manufacture, and easy to install.

[0048] like Figure 1 As shown, in some optional embodiments, an oblique reinforcing rod 113 is also provided between two adjacent vertical struts 111, and the two ends of the oblique reinforcing rod 113 are respectively connected to the ends of the vertical struts 111 on the opposite sides.

[0049] In this embodiment, an inclined reinforcing rod 113 is provided between two adjacent vertical struts 111. The two ends of the inclined reinforcing rod 113 are respectively connected to the opposite ends of the vertical struts 111 on both sides, thereby improving the structural stability of the support assembly 11 and thus improving the durability of the cantilever counterweight mechanism for steel truss beams.

[0050] like Figure 1 and Figure 4 As shown, in some optional embodiments, two first connecting plates 6 are also included. The two first connecting plates 6 are spaced apart on both sides of the end of the lower beam 13 along the first direction. The first connecting plates 6 are provided with three-way connecting ports with upward openings, which are used to connect the diagonal strut 112, the vertical strut 111 and the diagonal reinforcing rod 113, respectively.

[0051] In this embodiment, the cantilever counterweight mechanism for steel truss beams also includes two first connecting plates 6. The two first connecting plates 6 are spaced apart on both sides of the end of the lower beam 13 along the first direction. The first connecting plates 6 are provided with three-way connecting ports with upward openings, which are used to connect the diagonal support rod 112, the vertical support rod 111, and the diagonal reinforcement rod 113, respectively, so as to facilitate the connection of the diagonal support rod 112, the vertical support rod 111, and the diagonal reinforcement rod 113 to the lower beam 13 and achieve better connection effect.

[0052] like Figure 1 and Figure 3As shown, in some optional embodiments, a plurality of second connecting plates 7 are also included. The second connecting plates 7 are used to be installed on the upper beam 12 or the lower beam 13. The second connecting plates 7 are provided with three-way connecting ports, which are used to connect the vertical support rod 111 and the diagonal reinforcing rods 113 on both sides of the vertical support rod 111.

[0053] In this embodiment, the cantilever counterweight mechanism for steel truss beams also includes multiple second connecting plates 7. The second connecting plates 7 are used to be installed on the upper beam 12 or the lower beam 13. The second connecting plates 7 are provided with three-way connection ports, which are used to connect the vertical support rod 111 and the diagonal reinforcing rods 113 on both sides of the vertical support rod 111, so as to facilitate the connection of the vertical support rod 111 and the diagonal reinforcing rods 113 on both sides of the vertical support rod 111 to the upper beam 12 or the lower beam 13, and the connection effect is better.

[0054] like Figure 1 and Figure 2 As shown, in some optional embodiments, the upper beam 12 includes:

[0055] Two upper chords 121 of the bearing beams are spaced apart along the first direction. The upper chords 121 of the bearing beams are arranged along the second direction and partially extend into the vertical projection range of the lower beam 13 in the second direction. The upper chords 121 of the bearing beams are used to set the first counterweight 3.

[0056] Multiple connecting beams 122 are spaced apart along the second direction. The two ends of the connecting beams 122 are respectively connected to the upper chords 121 of the two bearing beams. The connecting beams 122 are located at the connection between the vertical strut 111 and the upper chords 121 of the bearing beams.

[0057] In this embodiment, the specific structure of the upper beam 12 is described. The upper beam 12 includes two upper chords of the supporting beams 121 and multiple connecting beams 122. The two upper chords of the supporting beams 121 are spaced apart along a first direction, and the upper chords of the supporting beams 121 are spaced apart along a second direction, with a portion extending into the vertical projection range of the lower beam 13. A first counterweight 3 is mounted on the upper chords of the supporting beams 121. The multiple connecting beams 122 are spaced apart along the second direction, and both ends of the connecting beams 122 are connected to the two upper chords of the supporting beams 121 respectively. The connecting beams 122 are located at the connection between the vertical strut 111 and the upper chords of the supporting beams 121. The structure is simple and has high stability.

[0058] like Figure 1 and Figure 2 As shown, in some optional embodiments, the upper beam 12 is also provided with a placement structure 8, which includes a plurality of distribution beams 81 spaced apart along the second direction. The distribution beams 81 are arranged along the first direction and are connected at both ends to the upper chords 121 of the two bearing beams respectively. The distribution beams 81 are used to set the first counterweight 3.

[0059] In this embodiment, a placement structure 8 is also provided on the upper beam 12. The placement structure 8 includes a plurality of distribution beams 81 spaced apart along the second direction. The distribution beams 81 are arranged along the first direction and are connected at both ends to the upper chords 121 of the two bearing beams respectively. The distribution beams 81 are used to set the first counterweight 3 to further improve the bearing effect of the upper beam 12.

[0060] In some alternative embodiments, the additional load-bearing component 4 is detachably connected to the lower beam 13.

[0061] In this embodiment, the additional load-bearing component 4 is detachably connected to the lower beam 13, which allows for easy disassembly and replacement of the additional load-bearing component 4, facilitating multiple uses and improving applicability.

[0062] In summary, when using this cantilever counterweight mechanism for steel trusses, the support assembly 11, upper beam 12, and lower beam 13 are first spliced ​​with the steel truss. A first counterweight block 3 is then installed on the upper beam 12. Two additional load-bearing components 4 are then installed on both sides of the lower beam 13, located at the ends of the lower beam 13. A second counterweight block 5 is installed on the additional load-bearing components 4. Because the first counterweight block 3 is installed on the upper beam 12, and the second counterweight block 5 is installed on the additional load-bearing components 4 on both sides of the lower beam 13, the range of bridge deck counterweight is reduced or eliminated, and the counterweight lever arm is increased. This solves the problem in the prior art where, due to the limited space and strength of the bridge deck, in order to reduce bridge deck pressure and leave room for bridge deck construction, it is necessary to increase the range of bridge deck counterweight, which indirectly reduces the counterweight lever arm and lowers the efficiency of counterweight conversion to anti-overturning moment.

[0063] In the description of this application, it should be noted that the terms "upper," "lower," 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 this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Unless otherwise expressly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication between two elements. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0064] It should be noted that in this application, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0065] The foregoing is merely a list of specific embodiments of the present application, intended to enable those skilled in the art to understand or implement the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application is not limited to the embodiments shown herein, but is intended to conform to the broadest scope consistent with the principles and novel features of the present application.

Claims

1. A cantilever counterweight mechanism for steel truss beams, characterized in that, include: A cantilever structure (1) is used to be installed on a steel truss beam, including an upper beam (12) and a lower beam (13) spaced apart, and a support assembly (11) disposed between the upper beam (12) and the lower beam (13), wherein the upper beam (12) is used to install a first counterweight (3); Two additional load-bearing components (4) are respectively disposed on both sides of the lower beam (13) and located at the ends of the lower beam (13). The additional load-bearing components (4) are used to set the second counterweight (5).

2. The cantilever counterweight mechanism for steel truss beams as described in claim 1, characterized in that, The additional carrier component (4) includes: The secondary truss member (41) has one end for connecting to one side of the lower beam (13) and for setting the second counterweight (5); The secondary truss diagonal member (42) has one end located on the outside of the secondary truss chord member (41) and the other end connected to the upper beam body (12).

3. The cantilever counterweight mechanism for steel truss beams as described in claim 1, characterized in that, The upper beam (12) extends out of the vertical projection range of the lower beam (13) in the second direction, and the first counterweight (3) extends into the vertical projection range of the lower beam (13).

4. The cantilever counterweight mechanism for steel truss beams as described in claim 3, characterized in that, The support assembly (11) includes two sets of vertical support units spaced apart along a first direction. The two sets of vertical support units are respectively used to be installed on both sides of the lower beam (13). The vertical support unit includes: Multiple vertical struts (111) are spaced apart along the second direction. The vertical struts (111) are located on one side of the lower beam (13) and their upper ends are connected to the upper beam (12). An oblique strut (112) is provided, one end of which is connected to the end of the lower beam (13), and the other end is connected to the end of the upper beam (12) that extends out of the vertical projection range of the lower beam (13).

5. A cantilever counterweight mechanism for steel truss beams as described in claim 4, characterized in that, An oblique reinforcing rod (113) is provided between two adjacent vertical struts (111), and the two ends of the oblique reinforcing rod (113) are respectively connected to the opposite ends of the two vertical struts (111).

6. A cantilever counterweight mechanism for steel truss beams as described in claim 5, characterized in that, It also includes two first connecting plates (6), which are spaced apart on both sides of the end of the lower beam (13) along the first direction. The first connecting plates (6) are provided with three-way connecting ports with upward openings, which are used to connect the diagonal strut (112), the vertical strut (111), and the diagonal reinforcing rod (113), respectively.

7. A cantilever counterweight mechanism for steel truss beams as described in claim 5, characterized in that, It also includes multiple second connecting plates (7), which are used to be installed on the upper beam (12) or the lower beam (13). The second connecting plate (7) is provided with three-way connection ports, which are used to connect the vertical support rod (111) and the diagonal reinforcing rods (113) on both sides of the vertical support rod (111).

8. A cantilever counterweight mechanism for steel truss beams as described in claim 4, characterized in that, The upper beam (12) includes: Two upper chords (121) of the bearing beams are spaced apart along the first direction. The upper chords (121) of the bearing beams are arranged along the second direction and partially extend into the vertical projection range of the lower beam (13) in the second direction. The first counterweight (3) is arranged on the upper chords (121) of the bearing beams. Multiple connecting beams (122) are spaced apart along the second direction. The two ends of the connecting beams (122) are respectively connected to the upper chords (121) of the two bearing beams. The connecting beams (122) are located at the connection between the vertical strut (111) and the upper chords (121) of the bearing beams.

9. A cantilever counterweight mechanism for steel truss beams as described in claim 8, characterized in that, The upper beam (12) is also provided with a placement structure (8), which includes a plurality of distribution beams (81) spaced apart along the second direction. The distribution beams (81) are arranged along the first direction and are connected at both ends to the upper chords (121) of the two bearing beams respectively. The first counterweight (3) is placed on the distribution beams (81).

10. A cantilever counterweight mechanism for steel truss beams as described in claim 1, characterized in that, The additional load-bearing component (4) is detachably connected to the lower beam (13).

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