CN113718620A - Novel prefabricated inverted T shuttle type bent cap structure system - Google Patents
Novel prefabricated inverted T shuttle type bent cap structure system Download PDFInfo
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- CN113718620A CN113718620A CN202111137966.6A CN202111137966A CN113718620A CN 113718620 A CN113718620 A CN 113718620A CN 202111137966 A CN202111137966 A CN 202111137966A CN 113718620 A CN113718620 A CN 113718620A
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- 239000004567 concrete Substances 0.000 claims description 5
- 238000011065 in-situ storage Methods 0.000 claims description 3
- 238000010276 construction Methods 0.000 abstract description 20
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 3
- 241000755266 Kathetostoma giganteum Species 0.000 description 6
- 239000000463 material Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 239000010426 asphalt Substances 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 239000010410 layer Substances 0.000 description 3
- 238000009417 prefabrication Methods 0.000 description 3
- 230000002349 favourable effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000002457 bidirectional effect Effects 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 201000010099 disease Diseases 0.000 description 1
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000011150 reinforced concrete Substances 0.000 description 1
- 238000004826 seaming Methods 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
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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
- E01D2/00—Bridges characterised by the cross-section of their bearing spanning structure
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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
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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
- E01D19/06—Arrangement, construction or bridging of expansion joints
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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
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- Engineering & Computer Science (AREA)
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Abstract
The invention discloses a novel prefabricated inverted T shuttle type capping beam structure system which comprises a prefabricated inverted T shuttle type capping beam and a prefabricated beam, wherein the cross section of the prefabricated inverted T shuttle type capping beam is in a shuttle type, the longitudinal section of the prefabricated inverted T shuttle type capping beam is in an inverted T type, the height of an inverted T head structure of the prefabricated inverted T shuttle type capping beam is gradually reduced from the middle part of the capping beam to the two ends of the capping beam, platforms are formed on the front side and the rear side of the inverted T head structure of the prefabricated inverted T bottom structure of the prefabricated inverted T shuttle type capping beam, the prefabricated beam is placed on the platforms, and a beam end bridge deck is arranged at the beam end of the prefabricated beam to form a continuous simply supported bridge deck. The novel prefabricated inverted T shuttle-shaped capping beam structure system has the advantages of reliable structure, good durability and the like of a common simply-supported-to-continuous structure system, and can solve the problems of water seepage, reflective cracks and the like of a continuous structure for paving a simply-supported bridge deck; simple structure, site operation is convenient, and construction cycle is shorter, and the wholeness can be excellent, ensures that the driving is comfortable.
Description
Technical Field
The invention belongs to the technical field of bridge engineering prefabrication and assembly, and particularly relates to a novel prefabricated inverted T-shaped shuttle-shaped capping beam structure system.
Background
The concept and technology of green construction of bridges are continuously developed and perfected, and the selection of bridge structure systems and structural types, standardized structural design, industrialized construction, rapid construction and the like which accord with the green construction concept become the inevitable trend of bridge construction. Based on this, in recent years, prefabricated assembled bridges have been rapidly developed at home and abroad. At present, the main structural systems adopted by domestic prefabricated viaduct beams are as follows: 1. prefabricating a flat-head capping beam and a prefabricated beam (the structure is simply supported and the bridge deck is paved continuously); 2. prefabricating a flat-head capping beam and a prefabricated beam (simply supported and continuous); 3. the traditional prefabricated inverted T-shaped capping beam (namely the height of the inverted T-shaped head part is kept unchanged) + the prefabricated beam (the structure is simply supported and the bridge deck pavement is continuous), and the like. The prefabricated flat-head bent cap mainly adopts a rectangular section, and the main advantages of the section are that compared with the traditional prefabricated inverted T-shaped bent cap, the prefabricated flat-head bent cap is simple in structure, high in effective utilization rate of the section, relatively less in material consumption, relatively lighter in overall hoisting weight, and capable of achieving integral hoisting in the construction of the existing urban overhead main line bridge (bidirectional 6 lanes). The limitation of the prefabricated flat-head capping beam and prefabricated beam structure system is that the total height of the structure system is high, and the requirement is difficult to meet in a bridge height limited area. The traditional structural system of the prefabricated inverted T-shaped capping beam and the prefabricated beam reduces the total height of the structural system to the maximum extent so as to meet the requirement of limited height of the bridge beam. However, because the effective utilization rate of the cross section of the traditional prefabricated inverted T-shaped bent cap is low, the material consumption is large, the overall hoisting weight is heavy, and in order to adapt to the hoisting and transportation capacity of the current city, a construction mode of sectional prefabrication and sectional hoisting assembly is often adopted in the construction of urban elevated bridges, particularly main line bridges, and compared with the overall hoisting assembly, the construction process is relatively complex.
The structural simply-supported bridge deck pavement continuous system is the most widely applied simply-supported system in the existing overhead bridge, the construction is simple in the mode, but the damage phenomena of transverse cracks of the bridge deck, unevenness of an asphalt surface layer and the like generally occur in practical application, and regular maintenance is needed. The main reason for generating diseases is that the system is only continuous through a reinforced concrete pavement layer, and under the combined action of repeated vehicle load, temperature, uneven settlement and the like, the structural stress performance does not meet the requirements, so that the concrete of the pavement layer cracks and is extended onto the asphalt layer, and the driving safety and the comfort are affected.
The simply-supported-to-continuous structural system is also a continuous system widely applied to the existing overhead bridge. And erecting a front-span and rear-span simply-supported precast beam on site, and completing system conversion through tensioning a middle pier top hogging moment area prestressed beam, casting a middle cross beam on site and a wet joint after the system conversion is completed, so that the simply-supported precast beam is converted into a continuous structure. The field workload of the simply supported and then continuous structure system is relatively large, the construction period is relatively long, the number of the precast beams continuously spanning front and back must be consistent, and the adaptability of the precast beams in the widened section of the overhead is relatively weak.
Disclosure of Invention
In view of the above, in order to solve some practical problems of the conventional structural system in the process of prefabrication and assembly of a bridge, the invention aims to provide a novel prefabricated inverted-T shuttle-shaped capping beam structural system with reliable stress performance, small field workload and high construction speed, namely, the prefabricated large cantilever inverted-T shuttle-shaped capping beam and a continuous precast beam of a simply-supported bridge deck form a novel structural system in a matching manner, so as to solve the defects in the prior art.
In order to achieve the purpose, the invention is realized by the following technical scheme:
the utility model provides a novel prefabricated type of falling T shuttle type bent cap structure system, including prefabricated type of falling T bent cap and precast beam, the cross section performance of prefabricated type of falling T shuttle type bent cap is the shuttle type, the vertical section performance of prefabricated type of falling T bent cap is the type of falling T, highly from the bent cap middle part to bent cap both ends diminish gradually of the type of falling T head structure of prefabricated type of falling T shuttle type bent cap, the bottom construction of falling T of prefabricated type of falling T shuttle type bent cap is in both sides form the platform around the type of falling T head structure of prefabricated type of falling T shuttle type bent cap, the precast beam end of precast beam is provided with the beam-ends decking, and it is continuous to form the simply supported bridge panel of structure.
According to the novel prefabricated inverted T-shaped shuttle type capping beam structure system, a distance is reserved between the end surface of the inner side of the prefabricated beam and the outer side surface of the inverted T-shaped head structure of the prefabricated inverted T-shaped shuttle type capping beam.
According to the novel prefabricated inverted T-shaped shuttle-shaped capping beam structure system, the beam end bridge deck of the prefabricated beam extends outwards to form a beam end cantilever plate, a cast-in-place section is reserved between the beam end cantilever plates spanning from front to back to form a seam, and seam concrete is cast in place to connect the beam end cantilever plates spanning from front to back into a whole to form a longitudinal continuous bridge deck.
According to the novel prefabricated inverted T-shaped shuttle-shaped capping beam structure system, the longitudinal continuous bridge deck is located above the prefabricated inverted T-shaped shuttle-shaped capping beam, and a space is reserved between the longitudinal continuous bridge deck and the top surface of the prefabricated inverted T-shaped shuttle-shaped capping beam.
According to the novel prefabricated inverted T-shaped shuttle cap beam structure system, the thickness of the longitudinal continuous bridge deck plate is 15-35 cm.
The technical scheme of the invention has the beneficial effects that:
compared with the traditional prefabricated inverted T-shaped bent cap, the prefabricated inverted T-shaped shuttle-shaped bent cap meets the stress performance, saves materials to the maximum extent, effectively reduces the transportation and hoisting weight, and creates favorable conditions for once hoisting in place;
compared with the traditional prefabricated flat-head cover beam, the total system height of a structural system is reduced to the maximum extent, and the requirement of limited bridge height is met;
compared with a simply supported bridge deck pavement continuous system with a structure, the continuous structure of the simply supported bridge deck slab with the structure ensures the driving comfort, and simultaneously fundamentally solves the problems of poor durability, water seepage, reflective cracks and the like of the continuous structure of bridge deck pavement;
compared with a simply supported and then continuous system, the process of tensioning the pier top hogging moment prestressed bundles and converting the system is omitted, the field construction is simple, the construction period is shorter, the number of the precast beam pieces of the front span and the rear span is not required to be consistent and aligned, and the adaptability of the bridge width-variable section is obviously improved;
the invention has the obvious advantages of simple structure, convenient site construction, shorter construction period, good durability, excellent overall performance, capability of ensuring driving comfort and the like.
Drawings
To further illustrate the above objects, structural features and effects of the present invention, the present invention will be described in detail below with reference to the accompanying drawings.
FIG. 1 is a schematic cross-sectional layout of a prefabricated inverted T-shaped shuttle cap beam structural system according to the present invention;
FIG. 2 is a schematic longitudinal section layout of the prefabricated inverted T-shaped shuttle type bent cap structural system of the invention;
in the figure: 1. prefabricating an inverted T-shaped shuttle cover beam; 2. prefabricating a beam; 3. a column; 4. a support; 5. cantilever plates extend outwards from the beam ends; 6. and (6) seaming.
Detailed Description
The invention is further described with reference to the following drawings and specific examples, which are not intended to be limiting.
Referring to fig. 1 and 2, the novel prefabricated inverted T-shaped shuttle capping beam structure system comprises a prefabricated inverted T-shaped shuttle capping beam 1 and a prefabricated beam 2, wherein the cross section of the prefabricated inverted T-shaped shuttle capping beam 1 is in a shuttle shape and is consistent with the stress form of the structure, the longitudinal section of the prefabricated inverted T-shaped shuttle capping beam 1 is in an inverted T shape, the height H1 of an inverted T-shaped head structure of the prefabricated inverted T-shaped shuttle capping beam 1 is gradually reduced from the middle part of the capping beam to the two ends of the capping beam, the width B1 of the inverted T-shaped head structure is kept to be equal in width, and the specific size is required according to actual stress. The inverted T bottom structure of the prefabricated inverted T shuttle-shaped capping beam 1 forms platforms on the front side and the rear side of the inverted T head structure of the prefabricated inverted T shuttle-shaped capping beam 1, the prefabricated beam 2 is placed on the platforms, the beam end of the prefabricated beam 2 is provided with a beam end bridge deck, and the simply supported bridge deck of the formed structure is continuous. The prefabricated inverted T-shaped shuttle-shaped bent cap 1 is positioned at the top of the upright post 3 and is fixedly connected with the upright post 3 in an assembling way, and the prefabricated beam 2 is placed on platforms at two sides of the prefabricated inverted T-shaped shuttle-shaped bent cap 1 by adopting the support 4.
Continuing with the illustration, a distance B2 is left between the inboard end face of the precast beam 2 and the outboard face of the inverted T head structure of the precast inverted T-shaped shuttle cap 1.
In the preferred scheme, the beam end bridge deck of the precast beam 2 extends outwards to form a beam end cantilever plate 5, a cast-in-place section L2 is reserved between the beam end cantilever plates 5 spanning front and back to form a seam 6, and the length of the cast-in-place seam L2 at the beam end of the precast beam meets the connection requirement of stressed main ribs of a longitudinal continuous bridge deck. The cantilever plates 5 extending out from the beam ends of the front span and the rear span are connected into a whole by pouring joint concrete in situ to form a longitudinal continuous bridge deck slab, so that a bridge deck vacancy formed by the height change of the head part of the inverted T-shaped shuttle-shaped capping beam is replaced, and the continuity of the bridge deck is ensured.
As will be understood by those skilled in the art, a concrete pavement and an asphalt pavement are sequentially laid above the bridge deck from bottom to top. The longitudinal continuous bridge deck is positioned above the prefabricated inverted T-shaped shuttle-shaped capping beam 1, and a distance D3 is reserved between the longitudinal continuous bridge deck and the top surface of the prefabricated inverted T-shaped shuttle-shaped capping beam 1. The length of the cast-in-place joint at the beam end of the precast beam meets the connection requirement of stressed main ribs of the longitudinal continuous bridge deck slab, and the thickness of the longitudinal continuous bridge deck slab is 15-35 cm. The structure system has no field pier top hogging moment prestress beam tensioning and structure system conversion process, and the number of the front and rear span precast beam pieces does not need to be consistent and aligned.
The longitudinally continuous bridge deck structure replaces the bridge deck vacancy formed due to the change of the height of the upper structure of the inverted T-shaped shuttle-shaped capping beam, so as to ensure the continuity of the bridge deck. The length of the longitudinal continuous bridge deck is equal to the sum of the distance B2 between the beam end of the front-rear span precast beam 2 and two sides of the side face of the inverted-T-shaped head structure of the cover beam and the width B1 of the inverted-T-shaped head structure, namely the length of the longitudinal continuous bridge deck is equal to B2+ B1+ B2.
The inverted T-shaped shuttle-shaped bent cap provided by the invention meets the stress performance, saves materials to the maximum extent, effectively reduces the transportation and hoisting weight, creates favorable conditions for once hoisting in place, reduces the total system height of a structural system to the maximum extent, and meets the requirement of limited bridge height. The invention not only has the advantages of reliable structure, good durability and the like of a common simply-supported-then-continuous structure system, but also can solve the problems of water seepage, reflective cracks and the like of a continuous structure paved on a simply-supported bridge deck, and has the advantages of simple structure, convenience in site construction, shorter construction period, excellent overall performance and capability of ensuring driving comfort.
While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the invention.
Claims (5)
1. The utility model provides a novel prefabricated shuttle type bent cap structure system of falling T, its characterized in that, including prefabricated shuttle type bent cap of falling T (1) and precast beam (2), the cross section performance of prefabricated shuttle type bent cap of falling T (1) is the shuttle type, the vertical section performance of prefabricated shuttle type bent cap of falling T (1) is the type of falling T, the height of the head structure of falling T of prefabricated shuttle type bent cap of falling T (1) diminishes from the bent cap middle part to bent cap both ends gradually, the bottom structure of falling T of prefabricated shuttle type bent cap of falling T (1) is in both sides form the platform around the head structure of falling T of prefabricated shuttle type bent cap of falling T (1), precast beam (2) rest in on the platform, the beam-ends of precast beam (2) are provided with beam-ends bridge deck, and it is continuous to form the simple bridge deck of structure.
2. A novel prefabricated inverted-T shuttle cap structural system according to claim 1, characterized in that a distance is left between the inner side end surface of said prefabricated beam (2) and the outer side surface of the inverted-T head structure of said prefabricated inverted-T shuttle cap (1).
3. A novel prefabricated inverted-T shuttle-shaped capping beam structure system as claimed in claim 1, wherein a beam-end bridge deck of the prefabricated beam (2) is extended to form a beam-end extending cantilever plate (5), a cast-in-situ section is reserved between the beam-end extending cantilever plates (5) of the front span and the rear span to form a seam (6), and seam concrete is cast in situ to connect the beam-end extending cantilever plates (5) of the front span and the rear span into a whole to form a longitudinally continuous bridge deck.
4. A novel prefabricated inverted T-shaped shuttle capping structural system as claimed in claim 3, wherein said longitudinally continuous bridge deck is located above said prefabricated inverted T-shaped shuttle capping beam (1), and a space is left between said longitudinally continuous bridge deck and the top surface of said prefabricated inverted T-shaped shuttle capping beam (1).
5. A novel prefabricated inverted T-shaped shuttle cap beam structural system according to claim 3 or 4, wherein said longitudinally continuous deck slab has a thickness of 15 to 35 cm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111137966.6A CN113718620A (en) | 2021-09-27 | 2021-09-27 | Novel prefabricated inverted T shuttle type bent cap structure system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111137966.6A CN113718620A (en) | 2021-09-27 | 2021-09-27 | Novel prefabricated inverted T shuttle type bent cap structure system |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100994026B1 (en) * | 2010-04-15 | 2010-11-11 | 김은주 | Anti expansion joint bridge |
| CN203429551U (en) * | 2013-09-13 | 2014-02-12 | 上海市城市建设设计研究总院 | Cast-in-situ reverse T-shaped bent cap and bridge pier |
| CN103938533A (en) * | 2013-01-23 | 2014-07-23 | 上海市城市建设设计研究总院 | Simple-supported continuous structure and construction method thereof |
| CN110485278A (en) * | 2019-08-29 | 2019-11-22 | 上海市政工程设计研究总院（集团）有限公司 | A kind of half stealth of falling T bent cap construction |
| CN111455830A (en) * | 2020-03-24 | 2020-07-28 | 广东省交通规划设计研究院股份有限公司 | Large cantilever cover beam type bridge pier and construction method thereof |
| CN112746566A (en) * | 2021-01-12 | 2021-05-04 | 中铁大桥科学研究院有限公司 | Connecting structure of inverted T-shaped bent cap and main beam |
-
2021
- 2021-09-27 CN CN202111137966.6A patent/CN113718620A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100994026B1 (en) * | 2010-04-15 | 2010-11-11 | 김은주 | Anti expansion joint bridge |
| CN103938533A (en) * | 2013-01-23 | 2014-07-23 | 上海市城市建设设计研究总院 | Simple-supported continuous structure and construction method thereof |
| CN203429551U (en) * | 2013-09-13 | 2014-02-12 | 上海市城市建设设计研究总院 | Cast-in-situ reverse T-shaped bent cap and bridge pier |
| CN110485278A (en) * | 2019-08-29 | 2019-11-22 | 上海市政工程设计研究总院（集团）有限公司 | A kind of half stealth of falling T bent cap construction |
| CN111455830A (en) * | 2020-03-24 | 2020-07-28 | 广东省交通规划设计研究院股份有限公司 | Large cantilever cover beam type bridge pier and construction method thereof |
| CN112746566A (en) * | 2021-01-12 | 2021-05-04 | 中铁大桥科学研究院有限公司 | Connecting structure of inverted T-shaped bent cap and main beam |
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Application publication date: 20211130 |