CN101387100B - Single cable face W shaped web plate section cable-girder anchorage zone structure - Google Patents
Single cable face W shaped web plate section cable-girder anchorage zone structure Download PDFInfo
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- CN101387100B CN101387100B CN2008102229429A CN200810222942A CN101387100B CN 101387100 B CN101387100 B CN 101387100B CN 2008102229429 A CN2008102229429 A CN 2008102229429A CN 200810222942 A CN200810222942 A CN 200810222942A CN 101387100 B CN101387100 B CN 101387100B
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- cable
- girder
- suspension cable
- anchorage zone
- web plate
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Abstract
The invention relates to a cable-girder anchorage zone structure for single cable plane W-shaped web sections. A box girder web plate (3) is arranged slantways so as to form the cable-girder anchorage zone of a W-shaped web section; low-retraction vertical prestressed steel strands (7) are adopted in the box girder web plate(3); and stay cable anchorage blocks are arranged above and below a box girder top plate (8) respectively, so as to form an above-deck stay cable anchorage block (2) and a below-deck stay cable anchorage block (5). The technical proposal of the structure adopts a cable-girder anchorage zone structural system that W-shaped web section stay cables are anchored with a girder and avoids arranging a plurality of diaphragm plates in a stay cable anchorage zone in a box girder, thereby providing convenience for construction and saving construction cost. As a low-retraction prestressed tension anchorage system is adopted in the web plate, the problem that stay cable anchorage points transfer force and are partially stressed is solved, and the construction is simple and convenient.
Description
Technical field
The present invention relates to the bridge construction field of engineering technology, relate in particular to a kind of cable-girder anchorage zone structure that is used to handle anchoring between single cable face W shaped web plate section suspension cable and girder.
Background technology
Along with the development that national communication is built, domestic cable stayed bridge has been obtained huge development, and the Suo Li of suspension cable is also increasing, thereby the processing of suspension cable and girder anchorage zone local stress is brought great difficulty, becomes the key point of control bridge construction design.
General cable-girder anchorage zone structure employing anchor point in case is provided with the mode of diaphragm, and local stress is handled and adopted the high-strength smart indented bars of pricking that prestressing force is provided, and this structure is furnished with following limitation:
1, diaphragm is more, complex structure, constructional difficulties;
2, because the prestressed reinforcement spacing is less, cause plain bars to arrange, and laterally, the position phenomenon of colliding is serious between vertical prestressing bar, many can't moving;
3, prestressed reinforcement length is shorter, and what have has only 2m long, is difficult to guarantee effective prestress.
Summary of the invention
(1) technical problem that will solve
The purpose of this invention is to provide a kind of single cable face W shaped web plate section cable girder anchorage zone structure, to solve the difficult problem that the design of large-tonnage anchor-hold point exists in the prior art.
(2) technical scheme
In order to achieve the above object, technical scheme of the present invention proposes a kind of single cable face W shaped web plate section cable girder anchorage zone structure, and wherein, case web (3) adopts and is in tilted layout, and forms the cable-girder anchorage zone of W shape web plate section girder; Adopt low retraction vertical prestressing steel bundle (7) in the described case web (3); And below reaching more than the case back plate (8), the suspension cable anchor block is set respectively, form above suspension cable anchor block of bridge floor (2) and the following suspension cable anchor block of bridge floor (5).
In the above-mentioned single cable face W shaped web plate section cable girder anchorage zone structure, described case web (3), the above suspension cable anchor block of bridge floor (2) and the following suspension cable anchor block of bridge floor (5) when concreting together formwork erection build, and pre-buried suspension cable anchor plate (4) and suspension cable sleeve (1), build the described low retraction vertical prestressing steel bundle of concrete post-tensioning (7), carried out suspension cable lashing and stretch-draw then.
In the above-mentioned single cable face W shaped web plate section cable girder anchorage zone structure, described suspension cable anchor plate (4) adopts association's form, make described suspension cable anchor block form associating anchor slab structure, thereby anchor point Suo Li is evenly passed to the following suspension cable anchor block of bridge floor (5), solved the problem that anchor point position stress is concentrated.
In the above-mentioned single cable face W shaped web plate section cable girder anchorage zone structure, adopt the chamfering intermediate structure in the following suspension cable anchor block of described bridge floor (5) and the junction of case back plate (8).
In the above-mentioned single cable face W shaped web plate section cable girder anchorage zone structure, described case web (3) adopts certain angle, being in tilted layout of for example 30 °～70 ° of angles.
(3) beneficial effect
Technical scheme of the present invention adopts the cable-girder anchorage zone tectonic system of W shape web plate section suspension cable and girder anchoring, can avoid that staying cable anchorage zone is provided with a large amount of diaphragms in the case beam, has made things convenient for construction, has saved cost; Adopt low retraction prestressed stretch-draw anchor system in the web, solved power transmission of suspension cable anchor point and local pressure problem, easy construction.
Description of drawings
Fig. 1 is the anchor point position skiagraph of the embodiment of the invention;
Fig. 2 is the anchor point position cross-sectional drawing of the embodiment of the invention;
Fig. 3 is the W shape case web schematic diagram of the embodiment of the invention.
The specific embodiment
Following examples are used to illustrate the present invention, but are not used for limiting the scope of the invention.
In conjunction with reference to shown in the figure 1～3, among the embodiment of single cable face W shaped web plate section cable girder anchorage zone structure of the present invention, comprising: chamfering (6), low retraction vertical prestressing steel bundle (7) and case back plate (8) between suspension cable sleeve (1), the above suspension cable anchor block of bridge floor (2), case web (3), suspension cable anchor plate (4), the following suspension cable anchor block of bridge floor (5), suspension cable anchor block and case back plate.
During concreting, case web (3), case back plate (8), the above suspension cable anchor block of bridge floor (2) and the following suspension cable anchor block of bridge floor (5) together formwork erection are built, and pre-buried suspension cable anchor plate (4) and suspension cable sleeve (1), build the low retraction of concrete post-tensioning vertical prestressing steel bundle (7), carried out suspension cable lashing and stretch-draw then.
In conjunction with the embodiment shown in above-mentioned Fig. 1～3 as can be known, single cable face W shaped web plate section cable girder anchorage zone structure of the present invention has following advantage:
1). adopt the cable-girder anchorage zone tectonic system of W shape web plate section suspension cable and girder anchoring, can avoid that staying cable anchorage zone is provided with a large amount of diaphragms in the case beam, made things convenient for construction, saved cost;
2). adopt low retraction prestressed stretch-draw anchor system in the web, solved power transmission of suspension cable anchor point and local pressure problem, easy construction;
3). the setting of the above suspension cable anchor block of bridge floor, except that reducing staying cable anchorage zone stress concentrates, also played the effect that the protection suspension cable is avoided the bridge floor Vehicular impact;
4). the chamfering intermediate structure is adopted in following suspension cable anchor block of bridge floor and case back plate junction, and the stress that has reduced the junction is concentrated, and has optimized main beam stress;
5). the suspension cable anchor block adopts associating anchor slab structure, has solved anchor point position stress concentration phenomenon.
More than be preferred forms of the present invention, according to content disclosed by the invention, those of ordinary skill in the art can expect some identical, replacement schemes apparently, all should fall into the scope of protection of the invention.
Claims (3)
1. a single cable face W shaped web plate section cable girder anchorage zone structure is characterized in that, case web (3) adopts and is in tilted layout, and forms the cable-girder anchorage zone of W shape web plate section; Adopt low retraction vertical prestressing steel bundle (7) in the described case web (3); And below reaching more than the case back plate (8), the suspension cable anchor block is set respectively, form above suspension cable anchor block of bridge floor (2) and the following suspension cable anchor block of bridge floor (5), described case web (3), the above suspension cable anchor block of bridge floor (2) and the following suspension cable anchor block of bridge floor (5) when concreting together formwork erection build, and pre-buried suspension cable anchor plate (4) and suspension cable sleeve (1), build the described low retraction vertical prestressing steel bundle of concrete post-tensioning (7), carried out suspension cable lashing and stretch-draw then.
2. single cable face W shaped web plate section cable girder anchorage zone structure as claimed in claim 1 is characterized in that, adopts the chamfering intermediate structure in the following suspension cable anchor block of described bridge floor (5) and the junction of case back plate (8).
3. single cable face W shaped web plate section cable girder anchorage zone structure as claimed in claim 1 is characterized in that, described case web (3) adopts 30 °～70 ° angle lappings tiltedly to arrange.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008102229429A CN101387100B (en) | 2008-09-23 | 2008-09-23 | Single cable face W shaped web plate section cable-girder anchorage zone structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008102229429A CN101387100B (en) | 2008-09-23 | 2008-09-23 | Single cable face W shaped web plate section cable-girder anchorage zone structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101387100A CN101387100A (en) | 2009-03-18 |
| CN101387100B true CN101387100B (en) | 2010-09-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2008102229429A Active CN101387100B (en) | 2008-09-23 | 2008-09-23 | Single cable face W shaped web plate section cable-girder anchorage zone structure |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102392415B (en) * | 2011-10-26 | 2014-05-07 | 柳州欧维姆机械股份有限公司 | Vertical prestressed anchorage system and construction method thereof |
| CN102660920B (en) * | 2012-06-07 | 2013-04-03 | 河北燕峰路桥建设集团有限公司 | Framework type large-span combined prestressed highway bridge and preparation process thereof |
| CN108286220B (en) * | 2018-03-28 | 2023-11-10 | 中铁第四勘察设计院集团有限公司 | Bearing type cable-beam anchoring structure for cable-stayed bridge concrete box Liang Sanmian compression shear |
| CN112942126A (en) * | 2021-03-11 | 2021-06-11 | 贵州省交通规划勘察设计研究院股份有限公司 | Method capable of reducing stress of auxiliary pier of double-tower combined beam cable-stayed bridge |
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- 2008-09-23 CN CN2008102229429A patent/CN101387100B/en active Active
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| CN101387100A (en) | 2009-03-18 |
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