CN110485278B - A semi-inverted T invisible cap beam structure - Google Patents
A semi-inverted T invisible cap beam structure Download PDFInfo
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- CN110485278B CN110485278B CN201910810255.7A CN201910810255A CN110485278B CN 110485278 B CN110485278 B CN 110485278B CN 201910810255 A CN201910810255 A CN 201910810255A CN 110485278 B CN110485278 B CN 110485278B
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- 238000010276 construction Methods 0.000 claims abstract description 21
- 230000000694 effects Effects 0.000 claims abstract description 6
- 229910000831 Steel Inorganic materials 0.000 claims description 38
- 239000010959 steel Substances 0.000 claims description 38
- 238000004873 anchoring Methods 0.000 claims 1
- 238000005266 casting Methods 0.000 claims 1
- 238000009434 installation Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 238000010008 shearing Methods 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
Classifications
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
- E01D19/02—Piers; Abutments ; Protecting same against drifting ice
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
- E01D19/12—Grating or flooring for bridges; Fastening railway sleepers or tracks to bridges
- E01D19/125—Grating or flooring for bridges
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D2/00—Bridges characterised by the cross-section of their bearing spanning structure
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D2101/00—Material constitution of bridges
- E01D2101/20—Concrete, stone or stone-like material
- E01D2101/24—Concrete
- E01D2101/26—Concrete reinforced
- E01D2101/28—Concrete reinforced prestressed
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Bridges Or Land Bridges (AREA)
Abstract
一种半倒T隐形盖梁构造，两侧简支梁搁置在倒T形盖梁上，简支梁中梁设置牛腿，两侧牛腿位于盖梁倒T部分顶部上方，在顺桥向，两侧简支梁中梁牛腿端面之间设有间隙，两侧简支梁边梁端面之间设有间隙，所述间隙通过桥面连续或伸缩缝构造进行处理；在顺桥向，盖梁倒T部分位于左右两侧简支梁之间，在横桥向，盖梁倒T部分位于两侧边梁之间，在高度方向，盖梁倒T部分位于中梁牛腿下方，使得盖梁倒T部分在以上三个方向均被两侧简支梁遮挡，达到隐形效果。它具有常规倒T盖梁建筑高度低的优点，同时盖梁倒T部分可被简支梁遮挡，且桥面处仅剩一道间隙，相比常规倒T盖梁，具有桥面连续施工简便、行车舒适性好、景观效果好的独特优势。
A semi-inverted T invisible cap beam structure, where the two sides of the simply supported beams are placed on the inverted T-shaped cap beam, the middle beam of the simply supported beam is provided with a corbel, and the two sides of the corbel are located above the top of the inverted T part of the cap beam. In the longitudinal direction of the bridge, there is a gap between the end faces of the corbels of the middle beams of the simply supported beams on both sides, and there is a gap between the end faces of the side beams of the simply supported beams on both sides, and the gap is processed by the bridge deck continuous or expansion joint structure; in the longitudinal direction of the bridge, the inverted T part of the cap beam is located between the left and right simply supported beams, in the transverse direction of the bridge, the inverted T part of the cap beam is located between the side beams on both sides, and in the height direction, the inverted T part of the cap beam is located below the middle beam corbel, so that the inverted T part of the cap beam is blocked by the simple supported beams on both sides in the above three directions, achieving an invisible effect. It has the advantages of low building height of conventional inverted T cap beams, and at the same time, the inverted T part of the cap beam can be blocked by the simply supported beams, and there is only one gap left at the bridge deck. Compared with conventional inverted T cap beams, it has the unique advantages of simple continuous bridge deck construction, good driving comfort, and good landscape effect.
Description
Technical Field
The invention relates to the technical field of bridge structure design, in particular to a half-inverted T invisible bent cap structure.
Background
At present, the simply supported beam has the advantages of simple structure, suitability for adopting a prefabricated assembly process, high construction speed and the like, and is widely applied to small and medium span bridges. The multi-piece simply supported beam is placed on the inverted T-shaped bent cap, the conventional inverted T-shaped bent cap has the advantage of low structural height, and is widely applied to urban overhead, but the inverted T-shaped part and the left and right simply supported beams form two gaps, so that the defects of high requirements on bridge deck continuous construction, poor durability, influence on driving comfort due to double-seam arrangement at the expansion joint, poor appearance effect and the like are brought.
Disclosure of Invention
The invention aims to provide a half inverted T invisible bent cap structure, which has the advantage of low building height of a conventional inverted T bent cap, and simultaneously after the special structure treatment of a simply supported beam and the bent cap, the inverted T part of the bent cap can be shielded by the simply supported beam on the top surface, the vertical surface and the side surface, and only one gap is left at the bridge deck (the bridge deck expansion joint and the continuous joint are reduced by half compared with the conventional inverted T bent cap), so that the bent cap structure has the unique advantages of simple bridge deck continuous construction, good travelling comfort and good landscape effect.
The technical scheme is that the semi-inverted T invisible bent cap structure is characterized in that two side simply supported beams are placed on an inverted T-shaped bent cap, upper edges of two ends of a simply supported beam middle beam are provided with forward-bridge brackets, the two side forward-bridge brackets are located above the top of an inverted T-shaped bent cap portion, a transverse-bridge inverted-T-shaped bent cap portion extends to a certain distance from the end of the bent cap portion, transverse-bridge brackets are formed at the transverse-bridge end of the bent cap portion, so that two side edge beams can not be separated by the inverted-T-shaped portion, gaps are formed between the forward-bridge bracket end faces of the two side simply supported beams middle beam, the two side simply supported beams pass through the two sides of the bent cap portion, gaps are formed between the end faces of the two side simply supported beams, the gaps are processed through bridge deck continuous or expansion joint structures, in the forward-bridge direction, the inverted-bridge inverted-T-shaped bent cap portion is located between the left side simply supported beams and the right side simply supported beams, the inverted-bridge inverted-T-shaped bent cap portion is located between the two side edge beams, in the height direction, the forward-bridge inverted-T-shaped bent cap portion is located below the bridge brackets of the middle beam can not be blocked by the two side edge beams, and the two side simply supported beams are blocked in the three directions.
Further, permanent supports are arranged on brackets at two sides of the inverted T-shaped bent cap and are used for placing the simple beams at two sides.
Further, gaps are arranged between the ends of the middle beams of the simply supported beams at the two sides in the forward bridge direction, namely the roots of the brackets in the forward bridge direction and the inverted T parts of the cover beams; A gap is arranged between the side face of the side beam of the simply supported beam and the side face of the inverted T-shaped part of the bent cap in the transverse bridge direction, and a gap is arranged between the bottom of the forward-bridge bracket of the center beam of the simply supported beam and the top of the inverted T-shaped part of the bent cap in the height direction, wherein the gap does not need bridge deck continuous or expansion joint construction treatment.
Further, the transverse bridge of the transverse end part of the half-inverted T-shaped invisible bent cap is constructed to be a key stress part, and the prestressed steel bundles are downwards bent at the position of the transverse bridge to the bracket, so that the shearing resistance of the bracket can be effectively improved.
Further, one end of the prestress steel beam extending to the side face of the bent cap is set to be a tensioning end, and one end of the prestress steel beam extending to the bottom face of the bent cap is set to be a fixed end, so that tensioning and anchor sealing construction of the prestress steel beam at the bottom of the bent cap is avoided, and construction difficulty is reduced.
The invention further aims to provide a construction method of the half-inverted T invisible bent cap structure, which comprises the following steps:
A. pouring half inverted T-shaped bent cap concrete or installing half inverted T-shaped bent cap concrete sections;
B. tensioning a first batch of prestressed steel bundles of the bent cap;
C. The two side simply supported beams are placed on the inverted T-shaped bent cap through the support, the middle beams are provided with forward-bridge brackets, the forward-bridge brackets of the two side middle beams are positioned above the top of the inverted T-shaped bent cap, a gap is arranged between the forward-bridge end faces of the forward-bridge brackets of the two side middle beams, and a gap is arranged between the side beam end faces of the two side simply supported beams;
D. tensioning a second batch of prestressed steel bundles of the bent cap;
E. and C, carrying out bridge deck continuous or expansion joint construction treatment on the gap according to the design scheme.
Compared with a conventional inverted T-shaped bent cap, the semi-inverted T-shaped invisible bent cap provided by the invention has the advantages that the inverted T-shaped part of the transverse bridge towards the bent cap does not extend to the end part of the bent cap, so that the side beams on two sides can not be separated by the inverted T-shaped part, the top height of the inverted T-shaped part is lower than the top height of the simply supported beam in the height direction, and the middle beam can pass through the upside of the inverted T-shaped bent cap in a manner of arranging brackets at the top.
The bridge deck expansion joint and the continuous joint are reduced from two paths of the conventional inverted T-shaped bent cap to one path, the performance is more reliable, the process is simpler, the travelling comfort is better, and the bent cap is free from the influence of temperature gradient when being stressed and calculated, so that the structural safety is improved.
Drawings
FIG. 1 is a detail view of a bridge-facing elevation arrangement of the present invention (the profile of the capping beam is schematic and is not limited to the shape of the outer profile in the figure);
FIG. 2 is a cross-sectional layout view of A-A of the present invention (the cross-sectional simply supported beam is illustrated in a small box beam configuration, not limited to use with small box beams);
FIG. 3 is a cross-sectional layout of a B-B configuration of the present invention (the cross-sectional simply supported beam is illustrated by a small box beam structure and is not limited to use with small box beams).
FIG. 4 is one of the vertical layout diagrams of the prestressed steel bundles of the present invention (the outline of the bent cap structure and the number and shape of the prestressed steel bundles are used as references, and the prestressed steel bundles are not limited to the schematic diagrams);
FIG. 5 is a second schematic illustration of the vertical layout of the prestressed steel bundles of the present invention (the outline of the bent cap structure and the number and shape of the prestressed steel bundles are referenced, not limited to the schematic illustration in the figure);
Fig. 6 is a schematic view of a cross-sectional layout of a prestressed steel bundle constructed according to the present invention (the outline of the bent cap construction and the number and shape of the prestressed steel bundle are referred to, and are not limited to the schematic drawing).
Detailed Description
The invention is further described below with reference to the accompanying drawings:
The invention relates to a half inverted T invisible bent cap structure scheme which mainly comprises a half inverted T-shaped bent cap 1, two side simply supported beams (side beams 2a and middle beams 2 b), a middle beam forward-bridge bracket 3, two side simply supported beam supports (containing filler stones) 4, a half inverted T-shaped bent cap inverted T-shaped part 5, a first gap 6 between the side surface of a side beam of a transverse bridge forward-simply supported beam and the inverted T-shaped side surface, a second gap 7 between the bottom of a bracket and the inverted T-shaped top of the simply supported beam forward-bridge, a third gap 8 between the end surfaces of the side beam of the simply supported beam forward-bridge, a fourth gap 9 between the end parts (bracket root parts) of the side simply supported beam forward-bridge bracket and the inverted T-shaped bent cap of the simply supported beam, and a transverse bridge forward bracket 10 at the transverse end part of the bent cap.
A half-inverted T invisible bent cap structure is characterized in that two side simply supported beams (side beams 2a and middle beams 2 b) are placed on an inverted T-shaped bent cap 1 through supports 4, an inverted T-shaped bent cap part 5 is positioned between left and right side simply supported beams (side beams 2a and middle beams 2 b) in the forward bridge direction, an inverted T-shaped bent cap part 5 is positioned between the side beams 2a in the transverse bridge direction, and an inverted T-shaped bent cap part 5 is positioned below a bracket 3 in the middle bridge direction in the height direction.
The inverted T-shaped cover beam part 5 is shielded by the simple support beams (side beams 2a and middle beams 2 b) at the two sides in the transverse bridge direction, the forward bridge direction and the height direction to achieve the invisible landscape effect, and meanwhile, the positions of the bridge deck continuous joints and the expansion joints are transferred from the positions (fourth gaps 9) between the two side simple support beams and the inverted T-shaped part of the conventional inverted T-shaped cover beam to the positions (third gaps 8) between the two side simple support beams, so that the number of the inverted T-shaped cover beams is reduced by half compared with that of the conventional inverted T-shaped cover beam, and the inverted T-shaped cover beam has the unique advantages of simplicity and convenience in bridge deck continuous construction and good driving comfort.
In the invention, the transverse end part of the bottom of the bent cap is provided with a transverse bridge-oriented bracket 10, the transverse bridge-oriented bracket 10 is a key stress part, the transverse bridge of the bent cap is provided with a first batch of steel beams N1 and a second batch of steel beams which are arranged at the inverted T part of the bent cap, wherein the second batch of prestressed steel beams comprise second steel beams N2, third steel beams N3, fourth steel beams N4 and fifth steel beams N5 which are arranged in a staggered manner, and the shearing resistance of the bracket can be effectively improved by downwards bending the second batch of prestressed steel beams at the position of the transverse bridge-oriented bracket;
The two ends of the first batch of prestressed steel bundles N1 are tensioning ends and are arranged on the side face of the inverted T-shaped part of the bent cap, one end, extending to the side face of the bent cap, of the second batch of prestressed steel bundles is set to be tensioning ends, one end, extending to the bottom face of the bent cap, of the second batch of prestressed steel bundles is set to be a fixed end, tensioning and anchor sealing construction of the prestressed steel bundles at the bottom of the bent cap is avoided, and construction difficulty is reduced.
A semi-inverted T invisible bent cap structure is described in detail as follows, wherein a third gap 8 is arranged between the end faces of middle beams 2b of two side simply supported beams along the bridge direction and between the end faces of bracket 3 of the side simply supported beams and the end faces of side beams 2a of the two side simply supported beams, and bridge deck continuous or expansion joint construction treatment is carried out on the third gap 8. A fourth gap 9 is arranged between the end part of the middle beam 2b of the simply supported beam at the two sides in the forward direction (the root part of the middle beam forward bracket 3) and the inverted T part 5 of the capping beam, a first gap 6 is arranged between the side surface of the side beam 2a of the simply supported beam and the side surface of the inverted T part 5 in the transverse direction, a second gap 7 is arranged between the bottom part of the middle beam forward bracket 3 of the simply supported beam 2a and the top part of the inverted T part 5 in the height direction, and the fourth gap 9, the first gap 6 and the second gap 7 do not need bridge deck continuous or expansion joint structural treatment.
A half-inverted T invisible bent cap structure comprises the following specific implementation steps:
A. pouring half inverted T-shaped bent cap concrete or installing half inverted T-shaped bent cap concrete sections;
B. Tensioning a first batch of prestressed steel bundles (a first steel bundle N1 in FIG. 4) of the bent cap before the construction of the two-side simply supported beams;
C. Constructing two side simply supported beams (side beams 2a, middle beams 2 b) and middle beam forward-bridge brackets 3, wherein the two side simply supported beams are placed on an inverted T-shaped bent cap, the middle beams of the simply supported beams are provided with middle beam forward-bridge brackets, the middle beams of the two side simply supported beams forward-bridge brackets are positioned above the top of the inverted T-shaped part of the bent cap, and gaps 8 are formed between the end faces of the middle beams of the two side simply supported beams 2b forward-bridge brackets 3 and between the end faces of the side beams of the two side simply supported beams 2 a;
D. after the simple beams on the two sides are constructed, tensioning a second batch of prestress steel bundles of the bent cap (the second batch of prestress steel bundles comprises second steel bundles N2, third steel bundles N3, fourth steel bundles N4 and fifth steel bundles N5 which are arranged in a staggered manner);
E. and C, carrying out bridge deck continuous or expansion joint construction treatment on the gap 8 according to the design scheme.
In the description of the present invention, it should be construed that the terms "upper", "lower", "two sides", "lateral", "forward", "transverse", "height", "top", "bottom", and the like, indicate any orientation or relative positional relationship based on that shown in the drawings, and are merely for convenience in describing the construction of the present invention and to simplify the description, and do not indicate or imply that the apparatus or elements to be referred to must have a specific orientation, and thus should not be construed as limiting the present invention.
While the foregoing describes specific embodiments of the present invention, those skilled in the art will recognize that such is by way of example only, and that the scope of the invention is defined by the claims appended hereto. Various changes and modifications to these embodiments may be made by those skilled in the art without departing from the principles and spirit of the invention, but such changes and modifications fall within the scope of the invention.
Claims (6)
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| CN201910810255.7A CN110485278B (en) | 2019-08-29 | 2019-08-29 | A semi-inverted T invisible cap beam structure |
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| CN201910810255.7A CN110485278B (en) | 2019-08-29 | 2019-08-29 | A semi-inverted T invisible cap beam structure |
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| CN110485278A CN110485278A (en) | 2019-11-22 |
| CN110485278B true CN110485278B (en) | 2025-04-18 |
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Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111455830B (en) * | 2020-03-24 | 2024-07-02 | 广东省交通规划设计研究院集团股份有限公司 | Large cantilever cover beam type bridge pier and construction method thereof |
| CN113512932B (en) * | 2021-03-19 | 2022-11-25 | 宁波市政工程建设集团股份有限公司 | Prestressed steel beam connected prefabricated small box girder type hidden cover beam and construction method thereof |
| CN113512929B (en) * | 2021-03-19 | 2022-10-25 | 宁波市政工程建设集团股份有限公司 | Steel-concrete combined structural hidden cover beam structure system and construction method thereof |
| CN113652966B (en) * | 2021-07-13 | 2022-11-25 | 宁波市政工程建设集团股份有限公司 | Construction method of full-prefabricated assembly type concrete beam type bridge structure system |
| CN113718637A (en) * | 2021-09-10 | 2021-11-30 | 上海市城市建设设计研究总院（集团）有限公司 | Bridge deck continuous structure for simply supported beam and inverted T-shaped capping beam system and construction method |
| CN113718620A (en) * | 2021-09-27 | 2021-11-30 | 上海市政工程设计研究总院（集团）有限公司 | Novel prefabricated inverted T shuttle type bent cap structure system |
| CN114016423A (en) * | 2021-11-25 | 2022-02-08 | 上海市政工程设计研究总院（集团）有限公司 | Construction method for simply supporting hidden cover beam and then continuously constructing small box beam |
| CN114214969B (en) * | 2021-12-01 | 2024-07-30 | 广州市市政工程设计研究总院有限公司 | Width splicing structure and method of width splicing bridge |
| CN115418938A (en) * | 2022-08-12 | 2022-12-02 | 上海通亿橡塑制品有限公司 | An expansion device combining two continuous seams and comb-tooth expansion joints |
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| CN211006316U (en) * | 2019-08-29 | 2020-07-14 | 上海市政工程设计研究总院（集团）有限公司 | A semi-inverted T invisible cover beam structure |
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| US5144710A (en) * | 1991-02-28 | 1992-09-08 | Grossman Stanley J | Composite, prestressed structural member and method of forming same |
| KR100948896B1 (en) * | 2009-06-01 | 2010-03-24 | 주식회사 오케이컨설턴트 | Continuous construction method of psc composite concrete girders by using a precast cross-beam |
| KR101203978B1 (en) * | 2010-09-30 | 2012-11-22 | 주식회사 아앤시티 | upper structure of bridge |
| CN102021885B (en) * | 2011-01-04 | 2012-02-15 | 上海市城市建设设计研究院 | Bridge deck continuous seam structure |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN211006316U (en) * | 2019-08-29 | 2020-07-14 | 上海市政工程设计研究总院（集团）有限公司 | A semi-inverted T invisible cover beam structure |
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