CN114319137A - Basket type steel arch bridge pushing construction method with arch rib assembling support serving as temporary support rod - Google Patents
Basket type steel arch bridge pushing construction method with arch rib assembling support serving as temporary support rod Download PDFInfo
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- CN114319137A CN114319137A CN202210065257.XA CN202210065257A CN114319137A CN 114319137 A CN114319137 A CN 114319137A CN 202210065257 A CN202210065257 A CN 202210065257A CN 114319137 A CN114319137 A CN 114319137A
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- 238000010276 construction Methods 0.000 title claims abstract description 32
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 18
- 239000010959 steel Substances 0.000 title claims abstract description 18
- 238000000034 method Methods 0.000 claims abstract description 13
- 230000008569 process Effects 0.000 claims abstract description 7
- 238000003466 welding Methods 0.000 claims abstract description 5
- 230000008901 benefit Effects 0.000 abstract description 5
- 238000010586 diagram Methods 0.000 description 4
- 230000009471 action Effects 0.000 description 2
- 238000005452 bending Methods 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
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- 230000004048 modification Effects 0.000 description 1
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Abstract
The invention discloses a basket-type steel arch bridge pushing construction method with an arch rib assembling support also used as a temporary support rod, which comprises the following steps: designing the arch rib assembling support into a support with a splayed transverse bridge direction; the two sides are provided with upright columns, and the middle is provided with a transverse connecting system according to the requirement of the stability of the bracket; the upright columns of the brackets on the two sides are main stress rods of the brackets in the assembling stage and the pushing stage; the lower part of the upright post of the bracket is provided with a post foot, the upper part of the upright post of the bracket is provided with a post head, and the post head and the post foot are connected with the arch rib and the tie beam in a bolt connection or welding way; the construction process comprises the following steps: firstly, installing an arch rib assembling support, secondly assembling the arch rib on the support until closure, and thirdly, performing incremental launching construction. The method mainly has the following advantages: firstly, each support upright post respectively bears the weight of a part of arch rib sections and transmits the weight to the tie beam, so that the force applied to the tie beam in the pushing stage is uniform, secondly, the number of temporary projects is greatly reduced, and thirdly, the construction time is greatly reduced.
Description
Technical Field
The invention relates to the field of steel arch bridge pushing construction, in particular to a lifting basket type steel arch bridge pushing construction method with an arch rib assembling support serving as a temporary support rod.
Background
The pushing construction of the basket type steel arch bridge has two stages: an assembling stage and a pushing stage. And in the assembling stage, the assembling support is a support carrier of the arch rib sections, and the arch rib sections are well adjusted in posture on the support and then welded into an arch. In the pushing stage, the temporary stay bar is one of important temporary structures in the pushing process, connects the arch rib and the tie beam to form a web member between the arch rib and the tie beam, so that the arch rib, the tie beam and the stay bar form a truss structure together. It has the following functions: (1) reducing the span of the jacking force acting on the tie beam, and further reducing the bending moment generated by the jacking force on the tie beam; (2) the gravity of the arch rib is transferred, and the gravity of the arch rib is dispersed to each girder section and the temporary pier.
In recent years, a conventional construction method is to separately arrange two types of supports (for example, a hangzhou jiubau bridge, a Changsha fuyuanlu xiangjiang river bridge, a holeli Huaihe river bridge and the like all adopt the method), the arch rib splicing supports are vertical supports (fig. 3), and the support rods are generally diagonal support rods (fig. 4 and 5). The construction process comprises the following steps: installing an arch rib assembling support (shown in figures 1 and 3), assembling arch ribs on the support to close, dismantling the assembling support, installing an arch beam temporary support rod (shown in figures 4 and 5), and pushing construction. The construction method has the disadvantages that after the arch rib assembling support is disassembled, the arch rib immediately generates axial force which is transmitted to the arch springing along the arch axis under the action of self weight, the arch rib is deformed, and then the temporary stay bar is installed, so that the temporary stay bar is basically not stressed, the stress of the tie beam is not uniform in the pushing stage, and the phenomena of heavy ends and light middle are caused; secondly, two supports are needed to be arranged, the temporary steel consumption is large, and thirdly, the process of dismantling the assembled supports and then installing the temporary support rods consumes a lot of construction period.
Disclosure of Invention
Therefore, in order to solve the above disadvantages, the invention provides a method for pushing and constructing a basket-type steel arch bridge by using an arch rib splicing bracket as a temporary support rod; when the lifting basket type steel arch bridge is subjected to pushing construction, the arch rib assembling support is also used as a pushing temporary support rod, so that the bending moment borne by a tie beam in the pushing stage is reduced, the number of temporary projects can be reduced, and the construction time is shortened.
The invention is realized in this way, construct a arch rib and assemble the support and push the construction method to push of basket type steel arch bridge that is used as the temporary brace rod at the same time, characterized by that, go on according to the following way; the pushing construction method of the basket type steel arch bridge with the arch rib assembling support also used as a temporary support rod comprises the following steps: designing the arch rib assembling bracket into a bracket (figure 2) with a splayed transverse bridge direction; the two sides are provided with upright columns, and the middle is provided with a transverse connecting system according to the requirement of the stability of the bracket; the upright columns of the supports on the two sides are main stress rods of the supports in the assembling stage and the pushing stage. The lower part of the upright post of the bracket is provided with a post foot, the upper part of the upright post of the bracket is provided with a post head, and the post head and the post foot are connected with the arch rib and the tie beam in a bolt connection or welding way.
The construction process comprises the following steps: firstly, installing an arch rib assembling support, secondly assembling the arch rib on the support until closure, and thirdly, performing incremental launching construction.
The invention has the following advantages: the invention provides a pushing construction method of a basket type steel arch bridge, which is characterized in that an arch rib assembling support is also used as a temporary support rod, and compared with the prior art, the arch rib assembling support is also used as the temporary support rod, and support upright columns on two sides are main stress rod pieces of the support in an assembling stage and a pushing stage; the lower part of the upright post of the bracket is provided with a post foot, the upper part of the upright post of the bracket is provided with a post head, and the post head and the post foot can be connected with the arch rib and the tie beam in a bolt connection or welding way; the method mainly has the following advantages: firstly, each support upright post respectively bears the weight of a part of arch rib sections and transmits the weight to the tie beam, so that the force applied to the tie beam in the pushing stage is uniform, secondly, the number of temporary projects is greatly reduced, and thirdly, the construction time is greatly reduced.
Drawings
FIG. 1 is a bridge direction layout diagram of an arch rib assembling support;
FIG. 2 is a longitudinal arrangement diagram of a transverse bridge with arch rib assembling brackets also serving as temporary support rods;
FIG. 3 is a cross-bridge layout view of a conventional arch rib assembling support;
FIG. 4 is a schematic diagram showing the arrangement of temporary struts along the bridge direction according to the conventional scheme;
fig. 5 is a cross-bridge layout diagram of a conventional temporary stay bar.
Detailed Description
The present invention will be described in detail below with reference to the attached drawings, and the technical solutions in the embodiments of the present invention will be clearly and completely described. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention provides a basket type steel arch bridge pushing construction method with an arch rib splicing support serving as a temporary support rod, which is carried out as follows; the pushing construction method of the basket type steel arch bridge with the arch rib assembling support also used as a temporary support rod comprises the following steps: designing the arch rib assembling bracket into a bracket (figure 2) with a splayed transverse bridge direction; the two sides are provided with upright columns, and the middle is provided with a transverse connecting system according to the requirement of the stability of the bracket; the upright columns of the supports on the two sides are main stress rods of the supports in the assembling stage and the pushing stage. The lower part of the upright post of the bracket is provided with a post foot, the upper part of the upright post of the bracket is provided with a post head, and the post head and the post foot are connected with the arch rib and the tie beam in a bolt connection or welding way.
The construction process comprises the following steps: firstly, installing an arch rib assembling support, secondly assembling the arch rib on the support until closure, and thirdly, performing incremental launching construction.
This patent has following advantage and beneficial effect: the invention provides a pushing construction method of a basket type steel arch bridge, which takes an arch rib assembling support as a temporary support rod, and is different from the prior art in that the arch rib assembling support as a temporary support rod, and mainly has the following advantages: firstly, because the method of dismantling the bracket and then installing the temporary stay bar is not adopted, the force transmission and deformation of the arch rib to the arch springing under the action of the dead weight are avoided, the stress of each bracket is relatively uniform, and the phenomenon of heavy ends and light middle part of the tie beam during pushing is avoided; temporary support rods are not independently arranged, so that the number of temporary steel is greatly reduced; and thirdly, the working procedures of support dismantling and temporary stay bar installation are reduced, and the construction time is greatly shortened.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (1)
1. A basket-type steel arch bridge pushing construction method using an arch rib splicing support as a temporary support rod is characterized by comprising the following steps of; the pushing construction method of the basket type steel arch bridge with the arch rib assembling support also used as a temporary support rod comprises the following steps: designing the arch rib assembling support into a support with a splayed transverse bridge direction; the two sides are provided with upright columns, and the middle is provided with a transverse connecting system according to the requirement of the stability of the bracket; the upright columns of the brackets on the two sides are main stress rods of the brackets in the assembling stage and the pushing stage; the lower part of the upright post of the bracket is provided with a post foot, the upper part of the upright post of the bracket is provided with a post head, and the post head and the post foot are connected with the arch rib and the tie beam in a bolt connection or welding way;
the construction process comprises the following steps: firstly, installing an arch rib assembling support, secondly assembling the arch rib on the support until closure, and thirdly, performing incremental launching construction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210065257.XA CN114319137A (en) | 2022-01-20 | 2022-01-20 | Basket type steel arch bridge pushing construction method with arch rib assembling support serving as temporary support rod |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210065257.XA CN114319137A (en) | 2022-01-20 | 2022-01-20 | Basket type steel arch bridge pushing construction method with arch rib assembling support serving as temporary support rod |
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| Publication Number | Publication Date |
|---|---|
| CN114319137A true CN114319137A (en) | 2022-04-12 |
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|---|---|---|---|
| CN202210065257.XA Pending CN114319137A (en) | 2022-01-20 | 2022-01-20 | Basket type steel arch bridge pushing construction method with arch rib assembling support serving as temporary support rod |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116289633A (en) * | 2023-05-24 | 2023-06-23 | 北京市第三建筑工程有限公司 | Pointer type pushing and sliding construction system and method for bridge unilateral construction assembly |
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2022
- 2022-01-20 CN CN202210065257.XA patent/CN114319137A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116289633A (en) * | 2023-05-24 | 2023-06-23 | 北京市第三建筑工程有限公司 | Pointer type pushing and sliding construction system and method for bridge unilateral construction assembly |
| CN116289633B (en) * | 2023-05-24 | 2023-08-08 | 北京市第三建筑工程有限公司 | Pointer type pushing and sliding construction system and method for bridge unilateral construction assembly |
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Application publication date: 20220412 |
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