CN113481831A - Seamless pier structure and construction method thereof - Google Patents
Seamless pier structure and construction method thereof Download PDFInfo
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- CN113481831A CN113481831A CN202110647587.5A CN202110647587A CN113481831A CN 113481831 A CN113481831 A CN 113481831A CN 202110647587 A CN202110647587 A CN 202110647587A CN 113481831 A CN113481831 A CN 113481831A
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- concrete
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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)
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- Structural Engineering (AREA)
- Bridges Or Land Bridges (AREA)
Abstract
The invention discloses a seamless pier structure which comprises a pier body and a main beam, wherein a concrete strand is arranged at one end or two ends of the pier body, the pier body and the main beam are connected through the concrete strand, the concrete strand comprises a concrete upper part and a concrete lower part, a plurality of connecting steel bars are arranged in the concrete strand, the connecting steel bars are transversely and uniformly distributed at intervals along the pier body, the lower ends of the connecting steel bars extend downwards and are fixed in the pier body, and gaps on the left side and the right side between the concrete strand upper part and the concrete strand lower part are filled with chloroprene rubber cushion blocks and sponge rubber fillers. The seamless bridge pier structure is suitable for the deformation of a superstructure on a bridge pier due to the influence of factors such as temperature change, shrinkage and creep of concrete and the like, can absorb energy generated by the superstructure of a part of a bridge, and effectively improves the overall performance of an 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 from the aspects of safety, practicality, economy, beauty and the like. Before the last 60 years of the century, bridges constructed in the united states were bridges with expansion joints. With the increase of the operation years of bridges, many expansion joints cannot play a normal role under the influence of various diseases. Therefore, a large amount of manpower and financial resources are required to be invested in later-period operation to maintain and replace the damaged and failed expansion joint, and traffic transportation is affected. After the last 60 s, the jointless bridges started to attract a lot of attention from engineers in this environment.
At present, the seamless bridge is mainly divided into an extension bridge deck seamless bridge, a semi-integral bridge abutment and an integral bridge abutment. The integral bridge is formed by integrating the upper structure, the abutment and the pile, so that the purpose of eliminating the expansion joint is achieved; the semi-integral bridge is the same as the integral bridge, no expansion joint or expansion device is 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. The integral bridge abutment can make the beam body stretch and contract under the action of temperature load and other loads to be restrained because of the elimination of a telescopic device and a support, and acting force can be transmitted to each bridge pier and the bridge abutment to be dispersed through the main beam. Therefore, the whole bridge mostly adopts rigid bridge abutment and flexible bridge pier. The semi-integral bridge is influenced by the transfer constraint of the butt strap and the support.
Monolithic or semi-monolithic bridges are widely popular for their low cost and maintenance, better driving comfort, but still find numerous disadvantages in wide spread and application: firstly, the main beam and the pier are connected into a whole, and when the whole is under the action of contraction, creep and alternating load of an upper structure, a larger stress concentration area is generated at the joint and the cracking phenomenon occurs. Under the influence of stress, the joint of the main beam and the pier can form a plastic hinge, so that the axial bearing capacity of the pier is reduced. In a traditional semi-integral bridge, although the telescopic constraint of the upper structure of the bridge can be adjusted by the butt strap, a plastic hinge can still be formed under the condition that the constraint amount of the upper structure to the lower structure is large, and the axial bearing capacity of the lower structure is further reduced.
Disclosure of Invention
The technical problem to be solved by the invention is to provide a seamless pier structure, which reduces the restraint displacement caused by the temperature load effect and improves the stress characteristic of the pier, and effectively improves the bearing capacity of the pier in order to reduce the lateral and transverse displacement of the pier and reduce the influence of the instantaneous displacement of the superstructure on the pier.
Therefore, the seamless pier structure provided by the invention comprises a pier body, a main beam and a bearing platform, wherein concrete strands are arranged at one end or two ends of the pier body, the upper end of the pier body and the main beam are connected through the concrete strands, each concrete strand comprises a concrete upper part and a concrete lower part, a plurality of connecting steel bars are arranged in each concrete strand, the connecting steel bars are transversely and uniformly distributed at intervals along the pier body, the lower ends of the connecting steel bars extend downwards and are fixed in the pier body, a necking part is formed at the joint between the concrete strand upper part and the concrete strand lower part, 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 extreme of connecting reinforcement all wrap up there is the felt, and two ends that the parcel has the felt all cup joint the rubber sleeve.
The connecting reinforcing steel bars are all located at the concrete necking part and penetrate and extend towards the upper part of the concrete strand and the lower part of the concrete strand.
And the upper part of the concrete strand and the lower part of the concrete strand are both internally provided with constructional steel bars.
And the width of the cross section of the concrete strand is smaller than that of the cross section of the pier.
And the bearing platform is fixedly connected with the lower end of the pier body through a concrete strand.
The construction method of the seamless pier structure comprises the following steps:
1) coating the lower parts of the connecting steel bars with a cattle felt, and sleeving the end heads coated with the cattle felt with rubber sleeves;
2) inserting one end, wrapped by the cow felt and the rubber sleeve, of the connecting steel bar into the pier body, and pouring the connecting steel bar and the pier body into a whole, wherein the inserting length is half of the length of the connecting steel bar;
3) pouring the lower part of the concrete strand, wherein the lower part of the concrete strand is internally provided with a constructional steel bar;
4) chloroprene rubber cushion blocks are sequentially placed on the side edge of the section of the lower part of the concrete winch at certain intervals;
5) sponge rubber filler is filled in gaps between concrete strands on the outer sides of the chloroprene rubber cushion blocks;
6) binding a cattle felt and a rubber sleeve on the exposed part of the upper part of the connecting steel bar;
7) and (3) building a template, pouring the upper part of the concrete strand, finishing the pouring of the concrete strand, and forming an integral pier by the pier and the concrete strand.
The invention has the beneficial effects that:
(1) through having the structure of concrete hank with the pier setting, can avoid whole bridge or half traditional whole bridge to receive the problem of very big moment of flexure effect because of factors effects such as temperature load, car brake force, when the superstructure receives the temperature load influence, the energy is released in concrete hank department, can avoid the reduction of axial load bearing capacity.
(2) The arrangement of the concrete strand of the bridge pier can further reduce the transverse and lateral displacement of the bridge pier, can avoid the phenomena of deformation and stress concentration caused by upper structure shrinkage and creep of the traditional integral bridge under the action of temperature load, further reduces the cracking of the bridge pier and enhances the durability of the bridge pier.
(3) The novel integral bridge pier structure has the advantages that the restraint of the connecting parts of the main beam and the bridge pier, the bridge pier and the bearing platform is effectively released, and the stress at the position is reduced.
Drawings
Fig. 1 is a schematic structural view of a seamless pier structural structure provided by the present invention;
fig. 2 is a schematic cross-sectional view of a concrete strand of the seamless pier structure shown in fig. 1.
Fig. 3 is a schematic cross-sectional structure view of another concrete strand of the seamless pier structure shown in fig. 1.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. 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.
Referring to fig. 1 to 3, the present invention provides a seamless bridge pier structure, which includes a bridge pier body 1, a girder 2, and a bearing platform 13, wherein a concrete hinge 3 is provided at one end or both ends of the bridge pier body. When pier body one end sets up the concrete hank, concrete hank 3 is connected between pier body 1 and girder 2. When concrete twists 3 are arranged at the two ends of the pier body, one concrete twist 3 is connected between the upper end of the pier body 1 and the main beam 2, and the other concrete twist is connected between the lower end of the pier body 1 and the bearing platform 13. The width of the section of the concrete strand 3 is smaller than that of the section of the pier 1. Through the arrangement of the concrete hank 3, the cross section of the pier is reduced at the position of the concrete hank, and the cross section is greatly reduced, so that the influence of the main beam on the bending moment of the pier due to factors such as temperature change and creep of concrete shrinkage is greatly reduced, partial rotational kinetic energy is released, and the pier is prevented from being greatly laterally moved to influence the bearing capacity of the pier.
A plurality of connecting reinforcement 9 have in the concrete hank 3, connecting reinforcement's upper end and lower extreme have all wrapped up the ox felt 10, and the rubber sleeve 11 is all cup jointed to two ends that the parcel has the ox felt part, and rubber sleeve 11 avoids the local destruction of reinforcing bar end to the concrete. Connecting reinforcement 9 is along the horizontal even interval distribution of pier body 1, a plurality of connecting reinforcement 9 all are located the concrete necking down portion to run through the extension to concrete hank upper portion 4 and concrete hank lower part 5. The lower extreme downwardly extending of connecting reinforcement 9 is fixed in pier body 1, and connecting reinforcement 9 remains this internal part of pier and all wraps up boa felt 10, and its tip cup joints rubber sleeve 11, avoids the reinforcing bar end to pier body concrete's local destruction. The pier 1 and the concrete strand 3 are poured and connected into a whole through the connecting steel bars 9 to form an integral pier.
The pier body 1 is provided with the structure with the concrete hinge, so that the problem that the pier is affected by a large bending moment due to the temperature load, the automobile braking force and other factors of the whole bridge or the traditional semi-whole bridge can be avoided, and when the upper structure is affected by the temperature load, the energy is released at the concrete hinge, so that the reduction of the axial load bearing capacity can be avoided.
The arrangement of the concrete strand of the bridge pier can further reduce the transverse and lateral displacement of the bridge pier, can avoid the phenomena of deformation and stress concentration caused by upper structure shrinkage and creep of the traditional integral bridge under the action of temperature load, further reduces the cracking of the bridge pier and enhances the durability of the bridge pier. The integral bridge pier structure has the advantages that the restraint of the main beam and the bridge pier, and the connection part of the bridge pier and the bearing platform is effectively released, and the stress at the position is reduced.
The construction method of the seamless pier structure comprises the following steps:
1) coating the lower parts of the connecting steel bars 9 with a cattle felt 10, and sleeving the end heads coated with the cattle felt with rubber sleeves 11;
2) inserting one end, wrapped by a cow felt 10 and a rubber sleeve 11, of a connecting steel bar 9 into a pier body 1, and pouring the connecting steel bar and the pier body into a whole, wherein the inserting length is half of the length of the connecting steel bar;
3) building a template, pouring a lower part 5 of the concrete strand, wherein a constructional steel bar 6 is arranged in the lower part of the concrete strand, the constructional steel bar and a connecting steel bar are welded and fixed, and the lower part of the concrete strand is poured integrally from the upper end of the pier body;
4) chloroprene rubber cushion blocks 7 are sequentially arranged on the side edge of the section of the concrete winch lower part 5 at certain intervals;
5) sponge rubber fillers 8 are filled in gaps among the concrete strands 3 on the outer sides of the chloroprene rubber cushion blocks 7;
6) binding a cattle felt 10 and a rubber sleeve 11 on the exposed part of the upper part of the connecting steel bar 9;
7) the concrete hinge is characterized in that a formwork is built, the concrete hinge upper portion 4 is poured, the concrete hinge upper portion is poured downwards through the lower portion of the concrete hinge, a necking portion is formed between the concrete hinge upper portion and the concrete hinge lower portion, the chloroprene rubber cushion block 7 and the sponge rubber packing 8 are arranged in the necking portion, the concrete hinge 3 is poured, and the bridge pier and the concrete hinge 3 form an integral bridge pier.
The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention. It should be noted that modifications and embellishments within the scope of the invention may occur to those skilled in the art without departing from the principle of the invention, and are considered to be within the scope of the invention.
Claims (7)
1. A seamless pier structure is characterized in that: including pier body, girder and cushion cap, pier body one end or both ends are provided with the concrete hank, connect through the concrete hank between pier body upper end and the girder, the concrete hank includes concrete upper portion and concrete lower part, a plurality of connecting reinforcement have in the concrete hank, connecting reinforcement along the horizontal even interval distribution of pier body, the connecting reinforcement lower extreme downwardly extending and fixing at pier originally internally, the junction forms the necking portion between concrete hank upper portion and the concrete hank lower part, chloroprene rubber cushion and the sponge rubber filler are filled to the necking portion left and right sides gap.
2. The seamless pier structure according to claim 1, wherein: the upper end and the lower extreme of connecting reinforcement all wrap up there is the felt, and two ends that the parcel has the felt all cup joint the rubber sleeve.
3. The seamless pier structure according to claim 1 or 2, wherein: the connecting reinforcing steel bars are all located at the concrete necking part and penetrate and extend towards the upper part of the concrete strand and the lower part of the concrete strand.
4. The seamless pier structure according to claim 3, wherein: and the upper part of the concrete strand and the lower part of the concrete strand are both internally provided with constructional steel bars.
5. The seamless pier structure according to claim 1, 2 or 4, wherein: and the width of the cross section of the concrete strand is smaller than that of the cross section of the pier.
6. The seamless pier structure according to claim 5, wherein: and the bearing platform is fixedly connected with the lower end of the pier body through a concrete strand.
7. A construction method of a seamless pier structure according to claim 1, comprising: the steps are as follows,
1) coating the lower parts of the connecting steel bars with a cattle felt, and sleeving the end heads coated with the cattle felt with rubber sleeves;
2) inserting one end, wrapped by the cow felt and the rubber sleeve, of the connecting steel bar into the pier body, and pouring the connecting steel bar and the pier body into a whole, wherein the inserting length is half of the length of the connecting steel bar;
3) pouring the lower part of the concrete strand, wherein the lower part of the concrete strand is internally provided with a constructional steel bar;
4) chloroprene rubber cushion blocks are sequentially placed on the side edge of the section of the lower part of the concrete winch at certain intervals;
5) sponge rubber filler is filled in gaps between concrete strands on the outer sides of the chloroprene rubber cushion blocks;
6) binding a cattle felt and a rubber sleeve on the exposed part of the upper part of the connecting steel bar;
7) and (3) building a template, pouring the upper part of the concrete strand, finishing the pouring of the concrete strand, and forming an integral pier by the pier and the concrete strand.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| 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 true CN113481831A (en) | 2021-10-08 |
| CN113481831B CN113481831B (en) | 2023-07-18 |
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Citations (10)
| 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 |
| KR20070081737A (en) * | 2006-02-13 | 2007-08-17 | 아사히 엔지니어링 가부시키가이샤 | Floor slab bridge structure |
| CN104562923A (en) * | 2015-01-17 | 2015-04-29 | 福州大学 | Semi-rigid-joint integral type abutment bridge supported by concrete pile and construction method |
| CN104746420A (en) * | 2015-04-08 | 2015-07-01 | 福州大学 | Structure for connecting upper and lower parts of bridge wrapped with rubber cap steel tube and constructing method thereof |
| 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 |
| CN110306425A (en) * | 2019-06-05 | 2019-10-08 | 中铁二院工程集团有限责任公司 | The pier bottom construction for bearing the squat pier rigid frame bridge of moment of flexure can significantly be reduced |
| CN111485487A (en) * | 2020-04-22 | 2020-08-04 | 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 |
| 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 |
-
2021
- 2021-06-10 CN CN202110647587.5A patent/CN113481831B/en active Active
Patent Citations (10)
| 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 |
| KR20070081737A (en) * | 2006-02-13 | 2007-08-17 | 아사히 엔지니어링 가부시키가이샤 | Floor slab bridge structure |
| CN104562923A (en) * | 2015-01-17 | 2015-04-29 | 福州大学 | Semi-rigid-joint integral type abutment bridge supported by concrete pile and construction method |
| CN104746420A (en) * | 2015-04-08 | 2015-07-01 | 福州大学 | Structure for connecting upper and lower parts of bridge wrapped with rubber cap steel tube and constructing method thereof |
| 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 |
| CN110306425A (en) * | 2019-06-05 | 2019-10-08 | 中铁二院工程集团有限责任公司 | The pier bottom construction for bearing the squat pier rigid frame bridge of moment of flexure can significantly be reduced |
| 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 |
| CN111485487A (en) * | 2020-04-22 | 2020-08-04 | 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 |
| CN111501534A (en) * | 2020-05-07 | 2020-08-07 | 合肥工业大学 | Assembled post-earthquake replaceable combined pier |
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| CN113481831B (en) | 2023-07-18 |
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