CN212925798U - Tower beam fixing type sling tower suitable for construction of long-span steel truss arch bridge - Google Patents
Tower beam fixing type sling tower suitable for construction of long-span steel truss arch bridge Download PDFInfo
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- CN212925798U CN212925798U CN202021189390.9U CN202021189390U CN212925798U CN 212925798 U CN212925798 U CN 212925798U CN 202021189390 U CN202021189390 U CN 202021189390U CN 212925798 U CN212925798 U CN 212925798U
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Abstract
The invention provides a tower beam fixed sling tower suitable for construction of a long-span steel truss arch bridge, which comprises a sling tower body, wherein the sling tower body is fixedly connected with a pier top steel truss arch rib through a bottom connecting structure; the sling tower body is provided with a front sling connected with the mid-span steel truss arch rib and a rear sling connected with the side-span steel truss arch rib; the bottom connecting structure comprises a first connecting piece and a second connecting piece at the bottom of the sling tower body, and a transverse connecting rod is fixed between the two connecting pieces; and a fifth connecting piece, a fourth connecting piece and a third connecting piece are sequentially arranged on the pier top steel truss arch rib from midspan to side span. The invention has simple structure form, clear force transmission path, stable structure of the tower girder consolidation form, no need of temporary landing pads in the assembling process, and can effectively reduce the number of temporary cable cables so as to ensure the stability and wind resistance of the cable tower in the assembling process.
Description
Technical Field
The invention belongs to the technical field of bridge engineering, and particularly relates to a tower beam fixed type sling tower suitable for construction of a long-span steel truss arch bridge.
Background
The large-span three-main-truss steel-truss arch bridge adopts a method of erecting a multi-layer sling tower auxiliary steel beam, and solves the technical problem that the displacement of a plurality of closure points at the closure opening of the three-main-truss steel-truss arch bridge is difficult to adjust in place simultaneously. Meanwhile, in the construction process, the stress of a steel beam rod piece and the deflection of a cantilever end of the steel beam are effectively controlled when a large cantilever is erected, the displacement and the corner of a closure opening of the cantilever end of the steel beam are changed by actively adjusting the cable force, and the method is one of effective measures for realizing the stress-free installation of the steel beam closure opening rod piece, so that the method is more and more widely applied. However, with the development of bridge industry in China, the design optimization and the application range of the three-main-truss steel truss arch bridge change, higher requirements are provided for the assembly construction of a sling tower, the machining and manufacturing precision requirement of a connecting part of the sling tower and a steel truss girder rod piece, the stress of the steel truss girder rod piece and the like in the auxiliary construction process of the tower beam hinged sling tower, particularly for the three-main-truss steel truss arch bridge with a small section of the steel truss girder rod piece at a main pier, and the strength and the stability of the steel truss girder rod piece at the main pier often become control factors in the whole construction process. The articulated department structural style of tower beam is complicated, the installation is numerous and diverse, in addition articulated tower top off normal in the work progress is too big, especially in the great area of annual wind-force, the swing range that will lead to the tower crane is too big, cause certain potential safety hazard, and top of the tower off normal is great in the work progress, it requires high to tower crane swing and tower crane wall-attached setting, there is the potential safety hazard, tower bottom articulated hoist cable pylon need set up the pad of temporarily copying in the process of assembling, the construction operation is complicated, and stability problem is outstanding, therefore, need optimize the improvement to hoist cable pylon structure.
Disclosure of Invention
In view of the above, the present invention provides a tower beam fixed type cable tower frame suitable for construction of a long-span steel truss arch bridge, which aims to overcome the defects in the prior art, and solves the technical problems in the prior art that the cable tower frame is difficult to assemble, the offset of the tower top is too large in the construction process, the requirement on the machining and manufacturing precision of the connection part of the cable tower frame and the steel truss beam rod piece is high, the installation process is complicated, the stress of the main beam rod piece of the connection part of the cable tower frame and the steel truss beam is too large, and the like.
In order to achieve the purpose, the technical scheme of the invention is realized as follows:
a tower beam fixed sling tower suitable for the construction of a long-span steel truss arch bridge comprises a sling tower body, wherein the sling tower body is fixedly connected with a pier top steel truss arch rib through a bottom connecting structure; the sling tower body is provided with a front sling connected with the mid-span steel truss arch rib and a rear sling connected with the side-span steel truss arch rib;
the bottom connecting structure comprises a first connecting piece and a second connecting piece at the bottom of the sling tower body, and a transverse connecting rod is fixed between the two connecting pieces; a fifth connecting piece, a fourth connecting piece and a third connecting piece are sequentially arranged on the pier top steel truss arch rib from midspan to side span;
a first supporting rod is fixed between the first connecting piece and the fifth connecting piece, and a second supporting rod is fixed between the second connecting piece and the third connecting piece;
a third supporting rod is fixed between the fourth connecting piece and the first connecting piece, and a fourth supporting rod is fixed between the fourth connecting piece and the second connecting piece.
Furthermore, a plurality of front sling mounting hole positions and a plurality of rear sling mounting hole positions are respectively arranged on two sides of the top section of the sling tower body.
Furthermore, a front anchor box for connecting a front sling is fixed on the mid-span steel truss arch rib; and a rear anchor box for connecting a rear sling is fixed on the side span steel truss arch rib.
Furthermore, the front sling and the rear sling are respectively provided with two slings.
Furthermore, two ends of the first supporting rod are fixed through a first connecting piece and a fifth connecting piece of a bolt respectively.
Furthermore, two ends of the second support rod are fixed through a second connecting piece and a third connecting piece of the bolt respectively.
Furthermore, two ends of the third supporting rod are fixed through a first connecting piece and a fourth connecting piece of the bolt respectively.
Furthermore, two ends of the fourth supporting rod are fixed through a second bolt connecting piece and a fourth bolt connecting piece respectively.
Furthermore, the transverse connecting rod is fixed with the first connecting piece and the second connecting piece through bolts.
Compared with the prior art, the invention has the following advantages:
the steel truss girder rod piece is simple in structural form, reasonable in bottom connecting structure design and clear in force transmission path, and stress of the steel truss girder rod piece at the pier top is effectively reduced. The machining and manufacturing process is simple, a large hinge shaft with high precision requirement is not needed, and the installation process is convenient and efficient. Meanwhile, the tower beam is stable in structure in a consolidation mode, a temporary landing pad is not needed in the assembling process, the number of temporary cables and cables can be effectively reduced, and the stability and the wind resistance of the sling tower in the assembling process are guaranteed.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and, together with the description, serve to explain the invention without limitation. In the drawings:
FIG. 1 is a schematic view of a sling tower body connected to a pier-top steel truss arch rib according to an embodiment of the invention;
FIG. 2 is a schematic view of a bottom connection structure during construction according to an embodiment of the present invention;
FIG. 3 is a schematic view of a sling tower body during construction according to an embodiment of the invention;
fig. 4 is a schematic view of the front sling and the rear sling being tensioned in an embodiment of the invention.
Description of reference numerals: 1-a sling tower body; 2-a bottom connection structure; 3-pier top steel truss arch rib; 4-midspan steel truss arch rib; 5-front sling; 6-side span steel truss arch rib; 7-rear sling; 8-a first connector; 9-a second connector; 10-a transverse connecting rod; 11-a fifth connection; 12-a fourth connection; 13-a third connection; 14-a first support bar; 15-a second support bar; 16-a third support bar; 17-a fourth support bar; 18-upright post; 19-a transverse linkage; 20-front sling mounting hole sites; 21-rear sling mounting hole sites; 22-front anchor box; 23-post anchor box; 24-temporary wind cables; 25-top section; 26-tower crane.
Detailed Description
It should be noted that the embodiments and features of the embodiments of the present invention may be combined with each other without conflict.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientation or positional relationship indicated in the drawings, which are merely for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be construed as limiting the invention. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the invention, the meaning of "a plurality" is two or more unless otherwise specified.
In the description of the invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted", "connected" and "connected" are to be construed broadly, e.g. as being fixed or detachable or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the creation of the present invention can be understood by those of ordinary skill in the art through specific situations.
The invention will be described in detail with reference to the following embodiments with reference to the attached drawings.
A tower beam fixed sling tower suitable for the construction of a long-span steel truss arch bridge, as shown in figures 1 to 4, comprises a sling tower body 1, wherein the sling tower body is fixedly connected with a pier top steel truss arch rib 3 through a bottom connecting structure 2; the sling tower body is provided with a front sling 5 connected with the mid-span steel truss arch rib 4 and a rear sling 7 connected with the side-span steel truss arch rib 6;
the bottom connecting structure comprises a first connecting piece 8 and a second connecting piece 9 at the bottom of the sling tower body, and a transverse connecting rod 10 is fixed between the two connecting pieces; a fifth connecting piece 11, a fourth connecting piece 12 and a third connecting piece 13 are sequentially arranged on the pier top steel truss arch rib from midspan to side span;
a first supporting rod 14 is fixed between the first connecting piece and the fifth connecting piece, and a second supporting rod 15 is fixed between the second connecting piece and the third connecting piece;
a third supporting rod 16 is fixed between the fourth connecting piece and the first connecting piece, and a fourth supporting rod 17 is fixed between the fourth connecting piece and the second connecting piece.
The sling tower is formed by assembling upright posts 18 and transverse connecting systems 19 section by section. The sling tower structure has clear force transmission path, disperses the internal force transmitted to the steel truss main beam rod piece at the pier top by the sling through the upright post of the sling tower body, reduces the stress of the steel truss main beam rod piece at the pier top and has good stability. The bottom connecting structure is simple in structural form, does not need a large hinge shaft with high precision requirement like a hinge tower, reduces installation complexity and improves construction efficiency.
In the assembling process of the sling tower, a stable structure system is formed, complex construction processes such as temporary cushion copying and dismantling are not needed, the number of temporary wind cables can be effectively reduced, and the verticality, the stability and the wind resistance of the sling tower in the assembling process can be guaranteed. In addition, the deviation in the whole construction process is relatively reduced, and the requirements of the swing amplitude of the tower crane and the stress problem of the wall attachment of the tower crane are easily met.
A plurality of front sling mounting hole positions 20 and a plurality of rear sling mounting hole positions 21 are respectively arranged on two sides of a top section 25 of the sling tower body, so that the sling can be conveniently connected, fixed and structurally arranged. Generally, the front sling and the rear sling are respectively provided with two slings.
A front anchor box 22 for connecting a front sling is fixed on the mid-span steel truss arch rib; and a rear anchor box 23 for connecting a rear sling is fixed on the side span steel truss arch rib.
Generally, each support rod and the connecting piece are connected through a bolt, the connecting pieces are detachably connected and fixed, and specifically, two ends of the first support rod are fixed through the first connecting piece and the fifth connecting piece of the bolt respectively. Two ends of the second support rod are fixed through a second connecting piece and a third connecting piece of the bolt respectively. Two ends of the third supporting rod are fixed through the first connecting piece and the fourth connecting piece of the bolt respectively. And two ends of the fourth supporting rod are fixed through a second connecting piece and a fourth connecting piece of the bolt respectively. In addition, the transverse connecting rod is fixed with the first connecting piece and the second connecting piece through bolts.
The construction method of the tower beam fixed type sling tower suitable for the construction of the long-span steel truss arch bridge is as follows:
as shown in fig. 2, after the tower crane construction is completed, assembling the sling tower bottom connection structure (i.e., connecting each member of the sling tower bottom connection structure with the steel truss arch rib member at the pier top);
as shown in fig. 3, after the assembly of the connecting structure at the bottom of the tower body of the suspension cable is completed, the standard sections (the standard sections are connected by the vertical columns and the transverse connecting system) and the top sections of the suspension cable tower are assembled section by using the tower crane 26. Until the assembly of the sling tower structure is completed;
as shown in fig. 4, the front slings and the rear slings are tensioned, and the front slings are connected with the mid-span steel truss arch rib, and the rear slings are connected with the side-span steel truss arch rib.
The steel truss girder rod piece is simple in structural form, reasonable in bottom connecting structure design and clear in force transmission path, and stress of the steel truss girder rod piece at the pier top is effectively reduced. The machining and manufacturing process is simple, a large hinge shaft with high precision requirement is not needed, and the installation process is convenient and efficient. Meanwhile, the tower beam is stable in structure in a consolidation mode, a temporary landing pad is not needed in the assembling process, the number of temporary cables and cables can be effectively reduced, and the stability and the wind resistance of the sling tower in the assembling process are guaranteed. And moreover, the offset of the top of the suspension tower in the construction process is reduced, and the requirements of the swing amplitude of the tower crane and the wall-attached stress of the tower crane are easily met.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and should not be taken as limiting the invention, so that any modifications, equivalents, improvements and the like, which are within the spirit and principle of the present invention, should be included in the scope of the present invention.
Claims (9)
1. The utility model provides a tower beam concretion formula hoist cable pylon suitable for long-span steel purlin arched bridge construction usefulness which characterized in that: the steel truss bridge comprises a sling tower body, wherein the sling tower body is fixedly connected with a pier top steel truss arch rib through a bottom connecting structure; the sling tower body is provided with a front sling connected with the mid-span steel truss arch rib and a rear sling connected with the side-span steel truss arch rib;
the bottom connecting structure comprises a first connecting piece and a second connecting piece at the bottom of the sling tower body, and a transverse connecting rod is fixed between the two connecting pieces; a fifth connecting piece, a fourth connecting piece and a third connecting piece are sequentially arranged on the pier top steel truss arch rib from midspan to side span;
a first supporting rod is fixed between the first connecting piece and the fifth connecting piece, and a second supporting rod is fixed between the second connecting piece and the third connecting piece;
a third supporting rod is fixed between the fourth connecting piece and the first connecting piece, and a fourth supporting rod is fixed between the fourth connecting piece and the second connecting piece.
2. The tower beam-fixed sling tower for the construction of a long-span steel truss arch bridge as claimed in claim 1, wherein: and a plurality of front sling mounting hole positions and a plurality of rear sling mounting hole positions are respectively arranged on two sides of the top section of the sling tower body.
3. The tower beam-fixed sling tower for the construction of a long-span steel truss arch bridge as claimed in claim 1, wherein: a front anchor box for connecting a front sling is fixed on the mid-span steel truss arch rib; and a rear anchor box for connecting a rear sling is fixed on the side span steel truss arch rib.
4. A tower beam-fixed sling tower suitable for construction of a long-span steel truss arch bridge as claimed in any one of claims 1 to 3, wherein: the front sling and the rear sling are respectively provided with two slings.
5. The tower beam-fixed sling tower for the construction of a long-span steel truss arch bridge as claimed in claim 1, wherein: and two ends of the first supporting rod are fixed through a first connecting piece and a fifth connecting piece of a bolt respectively.
6. The tower beam-fixed sling tower for the construction of a long-span steel truss arch bridge as claimed in claim 1, wherein: and two ends of the second supporting rod are fixed through a second connecting piece and a third connecting piece of a bolt respectively.
7. The tower beam-fixed sling tower for the construction of a long-span steel truss arch bridge as claimed in claim 1, wherein: and two ends of the third supporting rod are fixed through a first connecting piece and a fourth connecting piece of a bolt respectively.
8. The tower beam-fixed sling tower for the construction of a long-span steel truss arch bridge as claimed in claim 1, wherein: and two ends of the fourth supporting rod are fixed through a second bolt connecting piece and a fourth bolt connecting piece respectively.
9. The tower beam-fixed sling tower for the construction of a long-span steel truss arch bridge as claimed in claim 1, wherein: the transverse connecting rod is fixed with the first connecting piece and the second connecting piece through bolts.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021189390.9U CN212925798U (en) | 2020-06-24 | 2020-06-24 | Tower beam fixing type sling tower suitable for construction of long-span steel truss arch bridge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021189390.9U CN212925798U (en) | 2020-06-24 | 2020-06-24 | Tower beam fixing type sling tower suitable for construction of long-span steel truss arch bridge |
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| Publication Number | Publication Date |
|---|---|
| CN212925798U true CN212925798U (en) | 2021-04-09 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202021189390.9U Active CN212925798U (en) | 2020-06-24 | 2020-06-24 | Tower beam fixing type sling tower suitable for construction of long-span steel truss arch bridge |
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|---|---|
| CN (1) | CN212925798U (en) |
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- 2020-06-24 CN CN202021189390.9U patent/CN212925798U/en active Active
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