CN113481831B - Seamless pier structure and construction method thereof - Google Patents
Seamless pier structure and construction method thereof Download PDFInfo
- Publication number
- CN113481831B CN113481831B CN202110647587.5A CN202110647587A CN113481831B CN 113481831 B CN113481831 B CN 113481831B CN 202110647587 A CN202110647587 A CN 202110647587A CN 113481831 B CN113481831 B CN 113481831B
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- concrete
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- hank
- pier body
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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
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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
- E01D21/00—Methods or apparatus specially adapted for erecting or assembling bridges
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/30—Adapting or protecting infrastructure or their operation in transportation, e.g. on roads, waterways or railways
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Bridges Or Land Bridges (AREA)
Abstract
The invention discloses a seamless bridge pier structure, which comprises a bridge pier body and a main girder, wherein one end or two ends of the bridge pier body are provided with concrete hinges, the bridge pier body and the main girder are connected through the concrete hinges, each concrete hinge comprises a concrete upper part and a concrete lower part, a plurality of connecting reinforcements are arranged in each concrete hinge, the connecting reinforcements are uniformly distributed at intervals along the transverse direction of the bridge pier body, the lower ends of the connecting reinforcements extend downwards and are fixed in the bridge pier body, and gaps between the left side and the right side of the upper part of each concrete hinge and the lower part of each concrete hinge are filled with neoprene cushion blocks and sponge rubber fillers. The seamless pier structure is suitable for deformation of the upper structure caused by temperature change, shrinkage creep of concrete and other factors, can absorb energy generated by partial bridge upper structure, and effectively improves the overall performance of the integral seamless bridge.
Description
Technical Field
The invention relates to the field of bridge engineering, in particular to a seamless pier body structure and a construction method of the seamless pier body structure.
Background
Bridges are often designed in terms of safety, practicality, economy, aesthetics, etc. Bridge built in the united states was bridge with expansion joints before 60 s of the last century. With the increase of bridge operation years, many expansion joints cannot play a normal role under the influence of various diseases. Therefore, a large amount of labor and financial resources are required to be invested in the later operation to repair and replace the damaged and invalid expansion joint, and the transportation is affected. After 60 s of the last century, expansion joint-free bridges began to draw great attention from engineers in this environment.
The current seamless bridge is mainly divided into an extended bridge deck seamless bridge, a semi-integral bridge abutment and an integral bridge abutment. The integral bridge is formed by integrating an upper structure, a bridge abutment and piles, so that the aim of eliminating expansion joints is fulfilled; the semi-integral bridge is the same as the integral bridge, and an expansion joint and an expansion device are not arranged between the semi-integral bridge and the main beam, but the semi-integral bridge is generally provided with a support to support the main beam, and is not completely connected into a whole like an integral bridge abutment. Because the integral abutment cancels the telescoping device and the support, the beam body can stretch and contract under the action of temperature load and other loads and is restrained, and acting force can be transmitted to each pier and abutment through the main beam for dispersion. Therefore, the whole bridge mostly adopts a rigid bridge abutment and a flexible bridge pier. The semi-integral bridge is affected by the transfer constraint of the access plate and the support.
Integral or semi-integral bridges are widely welcome with their lower cost and maintenance, better ride comfort, but numerous disadvantages remain found in wide spread popularization and application: firstly, the girder and the pier are connected into a whole, and when the whole is subjected to the action of shrinkage, creep and alternating load of the upper structure, a larger stress concentration area is generated at the joint and a cracking phenomenon occurs. Under the influence of stress, a plastic hinge can be formed at the joint of the girder and the pier, so that the axial bearing capacity of the pier is reduced. In the traditional semi-integral bridge, although the expansion and contraction constraint of the upper structure of the bridge can be adjusted by the access board, plastic hinges can still be formed under the condition that the constraint amount of the upper structure to the lower structure is large, and then the axial bearing capacity of the lower structure is reduced.
Disclosure of Invention
The technical problem to be solved by the invention is to provide a seamless pier structure which reduces the constrained displacement caused by the action of temperature load and improves the stress characteristics of the pier, so as to reduce the lateral and transverse displacement of the pier and the influence of the instantaneous displacement of an upper structure on the pier, and effectively improve the bearing capacity of the pier.
The seamless pier structure comprises a pier body, a girder and a bearing platform, wherein one end or two ends of the pier body are provided with concrete hinges, the upper end of the pier body is connected with the girder through the concrete hinges, the concrete hinges comprise concrete upper parts and concrete lower parts, a plurality of connecting reinforcements are arranged in the concrete hinges, the connecting reinforcements are distributed at equal intervals in the transverse direction of the pier body, the lower ends of the connecting reinforcements extend downwards and are fixed in the pier body, a necking part is formed at the joint between the upper parts of the concrete hinges and the lower parts of the concrete hinges, and gaps on the left side and the right side of the necking part are filled with chloroprene rubber cushion blocks and sponge rubber fillers.
The upper end and the lower end of the connecting steel bar are wrapped with the cowhells, and the two ends wrapped with the cowhells are sleeved with the rubber sleeve.
The connecting steel bars are located at the concrete necking part and extend through the upper portion of the concrete runner and the lower portion of the concrete runner.
And constructional steel bars are arranged in the upper part of the concrete runner and the lower part of the concrete runner.
The width of the section of the concrete strand is smaller than that of the bridge pier.
The bearing platform is fixedly connected with the lower end of the pier body through a concrete winch.
The construction method of the seamless pier structure comprises the following steps:
1) Wrapping the lower parts of the plurality of connecting steel bars with the cow felts, and sleeving rubber sleeves at the end heads wrapped with the cow felts;
2) Inserting one end, which is wrapped by the connecting steel bars and is provided with the felt and the rubber sleeve, into the pier body, and pouring the pier body into a whole, wherein the insertion length is half of the length of the connecting steel bars;
3) Pouring a concrete winch lower part, wherein a construction steel bar is arranged in the concrete winch lower part;
4) Sequentially placing chloroprene rubber cushion blocks at a certain interval on the side edge of the section of the lower part of the concrete winch;
5) A gap between the concrete strands at the outer side of the chloroprene rubber cushion block is filled with sponge rubber filler;
6) Binding a cowfelt and a rubber sleeve on the exposed part of the upper part of the connecting steel bar;
7) Building a template, pouring the upper part of the concrete winch, and finishing the concrete winch pouring, wherein the pier and the concrete winch form an integral pier.
The invention has the beneficial effects that:
(1) Through the structure with the concrete hank with the pier setting, can avoid whole bridge or traditional half whole bridge to receive the problem of very big moment of flexure effect because of factor effects such as temperature load, car brake force, when the superstructure receives the temperature load influence, the energy releases in the concrete hank department, can avoid the reduction of axial load bearing capacity.
(2) The setting of pier concrete hank can further reduce the horizontal and the lateral displacement of pier to can avoid traditional whole bridge under the temperature load effect, because the upper structure shrink, creep the deformation and the phenomenon of stress concentration that arouse, also further reduced the fracture of pier simultaneously, strengthened the durability of pier.
(3) The novel integral bridge pier structure has the advantages that the constraint of the connecting parts of the main girder, the bridge pier and the bearing platform is effectively released, and the stress of the connecting parts is reduced.
Drawings
FIG. 1 is a schematic diagram of a seamless pier structure according to the present invention;
fig. 2 is a schematic cross-sectional view of a concrete strand of the seamless pier structure of fig. 1.
Fig. 3 is a schematic cross-sectional view of another view of the concrete hinge of the seamless pier structure of fig. 1.
Detailed Description
The technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention, and it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1 to 3, the invention provides a seamless pier structure, which comprises a pier body 1, main beams 2 and bearing platforms 13, wherein one end or two ends of the pier body are provided with concrete hinges 3. When the concrete hinge is arranged at one end of the pier body, the concrete hinge 3 is connected between the pier body 1 and the girder 2. When the concrete hinges 3 are arranged at two ends of the pier body, one concrete hinge 3 is connected between the upper end of the pier body 1 and the main girder 2, and the other concrete hinge is connected between the lower end of the pier body 1 and the bearing platform 13. The section width of the concrete strand 3 is smaller than that of the bridge pier 1. Through setting up the setting of concrete hank 3, make the pier cross-section reduce in concrete hank position, the cross-section reduces greatly to the girder is because of the moment of flexure influence that factors such as temperature variation, concrete shrinkage creep produced the pier, and release partial rotational energy, avoid the pier to take place great side and move, influence the bearing capacity of pier.
The concrete runner 3 comprises a concrete upper portion 4 and a concrete lower portion 5, structural steel bars 6 are arranged in the concrete runner upper portion 4 and the concrete runner lower portion 5, a necking portion 12 is formed at the joint between the concrete runner upper portion 4 and the concrete runner lower portion 5, gaps on the left side and the right side of the necking portion 12 are filled with neoprene cushion blocks 7 and sponge rubber fillers 8, the neoprene cushion layers 7 are close to the middle, and the sponge rubber cushion layers 8 are close to the outer side. The concrete winch is provided with a connecting steel bar 9 at the necking part, and the gap at two sides of the necking part of the concrete winch is filled with a chloroprene rubber cushion block 7 and a sponge rubber filler 8, so that the concrete winch 3 is designed to be rotatable. The bending moment transferred to the bridge pier by the main girder 2 can be greatly released, and the horizontal deflection of part of the bridge pier along the longitudinal direction of the bridge can be absorbed. The phenomenon of deformation and stress concentration caused by the shrinkage and creep of the upper structure of the traditional integral bridge under the action of temperature load can be avoided, meanwhile, the lateral deflection of the bridge pier is reduced, the cracking of the bridge pier is reduced, and the durability of the bridge pier is enhanced.
The concrete winch 3 is internally provided with a plurality of connecting steel bars 9, the upper ends and the lower ends of the connecting steel bars are respectively wrapped with a cowfelt 10, two ends wrapped with cowfelt parts are respectively sleeved with a rubber sleeve 11, and the rubber sleeves 11 avoid local damage of the steel bar ends to concrete. The connecting steel bars 9 are uniformly distributed at intervals along the transverse direction of the pier body 1, and the connecting steel bars 9 are positioned at the concrete necking part and extend through the concrete upper part 4 and the concrete lower part 5. The lower extreme downwardly extending of connecting reinforcement 9 is fixed in pier body 1, and the part that connecting reinforcement 9 left in the pier body all wraps up ox felt 10, and its tip cup joints rubber sleeve 11, avoids the reinforcing bar end to the local destruction of pier body concrete. And the bridge pier 1 and the concrete runner 3 are integrally cast and connected through the connecting steel bars 9 to form an integral bridge pier.
The pier body 1 is provided with a structure with a concrete winch, so that the problem that the pier is subjected to great bending moment action due to the factor actions of temperature load, automobile braking force and the like of a whole bridge or a traditional semi-whole bridge can be avoided, and when the upper structure is affected by the temperature load, energy is released at the concrete winch, so that the reduction of axial load bearing capacity can be avoided.
The setting of pier concrete hank can further reduce the horizontal and the lateral displacement of pier to can avoid traditional whole bridge under the temperature load effect, because the upper structure shrink, creep the deformation and the phenomenon of stress concentration that arouse, also further reduced the fracture of pier simultaneously, strengthened the durability of pier. The integral bridge pier structure has the advantages that the constraint of the connection parts of the main girder, the pier and the bearing platform is effectively released, and the stress of the connection parts is reduced.
The construction method of the seamless pier structure comprises the following steps:
1) Wrapping the lower parts of the plurality of connecting steel bars 9 with a cowfelt 10, and sleeving a rubber sleeve 11 at the end of the cowfelt;
2) Inserting one end, which is wrapped by the wool felt 10 and the rubber sleeve 11, of the connecting steel bar 9 into the pier body 1, and pouring the pier body into a whole, wherein the insertion length is half of the length of the connecting steel bar;
3) Building a template, pouring a concrete winch lower part 5, wherein a construction steel bar 6 is arranged in the concrete winch lower part, the construction steel bar is welded and fixed with a connecting steel bar, and the concrete winch lower part is integrally poured from the upper end of the pier body;
4) The side edges of the cross section of the lower part 5 of the concrete winch are sequentially provided with chloroprene rubber cushion blocks 7 according to a certain interval;
5) The gaps between the concrete strands 3 outside the neoprene cushion block 7 are filled with sponge rubber fillers 8;
6) Binding a cowfelt 10 and a rubber sleeve 11 on the exposed part of the upper part of the connecting steel bar 9;
7) Building a template, pouring a concrete winch upper part 4, pouring the concrete winch upper part downwards from the section of the concrete winch lower part, forming a necking part between the concrete winch upper part and the concrete winch lower part, arranging a chloroprene rubber cushion block 7 and a sponge rubber filler 8 on the necking part, and finishing pouring of the concrete winch 3, wherein the pier and the concrete winch 3 form an integral pier.
The above description is only a preferred embodiment of the present invention, and the scope of the present invention is not limited to the above examples, but all technical solutions under the concept of the present invention are within the scope of the present invention. It should be noted that modifications and adaptations to the present invention may occur to one skilled in the art without departing from the principles of the present invention and are intended to be within the scope of the present invention.
Claims (4)
1. A seamless pier structure is characterized in that: including pier body, girder and cushion cap, pier body both ends are provided with the concrete hank, connect through the concrete hank between pier body upper end and the girder, through concrete hank fixed connection between cushion cap and the pier body lower extreme, the concrete hank includes concrete upper portion and concrete lower part, the maximum cross-section width of concrete upper portion and the concrete lower part of concrete hank is all less than pier cross-section width, junction formation necking portion between concrete hank upper portion and the concrete hank lower part, have a plurality of connecting steel bars in the concrete hank, a plurality of connecting steel bars all are located concrete necking portion to run through to concrete hank upper portion and concrete hank lower part and extend, the connecting steel bar lower extreme downwardly extending and fix in the pier body, the connecting steel bar is along the horizontal even interval distribution of pier body, the gap packing chloroprene rubber cushion and sponge rubber filler in both sides about the necking portion.
2. The seamless pier structure according to claim 1, wherein: the upper end and the lower end of the connecting steel bar are wrapped with the cowhells, and the two ends wrapped with the cowhells are sleeved with the rubber sleeve.
3. A seamless pier structure according to claim 1 or 2, wherein: and constructional steel bars are arranged in the upper part of the concrete runner and the lower part of the concrete runner.
4. A construction method based on the seamless pier structure of claim 1, which is characterized in that: the construction method of the concrete hinge between the pier body and the girder comprises the following steps,
1) Wrapping the lower parts of the plurality of connecting steel bars with the cow felts, and sleeving rubber sleeves at the end heads wrapped with the cow felts;
2) Inserting one end, which is wrapped by the connecting steel bars and is provided with the felt and the rubber sleeve, into the pier body, and pouring the pier body into a whole, wherein the insertion length is half of the length of the connecting steel bars;
3) Pouring a concrete winch lower part, wherein a construction steel bar is arranged in the concrete winch lower part;
4) Sequentially placing chloroprene rubber cushion blocks at a certain interval on the side edge of the section of the lower part of the concrete winch;
5) A gap between the concrete strands at the outer side of the chloroprene rubber cushion block is filled with sponge rubber filler;
6) Binding a cowfelt and a rubber sleeve on the exposed part of the upper part of the connecting steel bar;
7) Building a template, pouring the upper part of the concrete winch, and finishing the concrete winch pouring, wherein the pier and the concrete winch form an integral pier.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202110647587.5A CN113481831B (en) | 2021-06-10 | 2021-06-10 | Seamless pier structure and construction method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110647587.5A CN113481831B (en) | 2021-06-10 | 2021-06-10 | Seamless pier structure and construction method thereof |
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| CN113481831A CN113481831A (en) | 2021-10-08 |
| CN113481831B true CN113481831B (en) | 2023-07-18 |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111501534A (en) * | 2020-05-07 | 2020-08-07 | 合肥工业大学 | Assembled post-earthquake replaceable combined pier |
| CN211571375U (en) * | 2019-12-17 | 2020-09-25 | 西安建筑科技大学 | Assembled elastic-plastic energy consumption device and rigid frame bridge thereof |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000336618A (en) * | 1999-06-02 | 2000-12-05 | Fujita Corp | Bridge pier supporting semi-fixed joint structure, and bridge |
| JP4318694B2 (en) * | 2006-02-13 | 2009-08-26 | 朝日エンヂニヤリング株式会社 | Floor slab bridge structure |
| CN104562923B (en) * | 2015-01-17 | 2016-06-29 | 福州大学 | A kind of construction method of the semi-rigid joint Integral Abutment Bridge of concrete-pile supporting |
| CN104746420B (en) * | 2015-04-08 | 2016-06-29 | 福州大学 | A kind of construction method of the bridge top and the bottom attachment structure of overcoat rubber cap steel pipe |
| CN108978450A (en) * | 2018-08-31 | 2018-12-11 | 浙江工业大学 | A kind of semi-integral bridge abutment connection structure and its construction method |
| CN109972649A (en) * | 2019-05-08 | 2019-07-05 | 山西路桥建设集团有限公司 | Suitable for reducing half hinge construction of bridge pier under geological process, cushion cap and basic stress |
| CN110306425B (en) * | 2019-06-05 | 2024-03-22 | 中铁二院工程集团有限责任公司 | Pier bottom structure of short pier rigid frame bridge capable of greatly reducing bearing bending moment |
| CN111485487B (en) * | 2020-04-22 | 2022-05-03 | 深圳市市政设计研究院有限公司 | Expansion joint-free bridge abutment suitable for large deformation and construction method thereof |
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2021
- 2021-06-10 CN CN202110647587.5A patent/CN113481831B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN211571375U (en) * | 2019-12-17 | 2020-09-25 | 西安建筑科技大学 | Assembled elastic-plastic energy consumption device and rigid frame bridge thereof |
| CN111501534A (en) * | 2020-05-07 | 2020-08-07 | 合肥工业大学 | Assembled post-earthquake replaceable combined pier |
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