CN112359712A - Three-column prestressed concrete gate pier for rail transit and construction method thereof - Google Patents
Three-column prestressed concrete gate pier for rail transit and construction method thereof Download PDFInfo
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- CN112359712A CN112359712A CN202011297752.0A CN202011297752A CN112359712A CN 112359712 A CN112359712 A CN 112359712A CN 202011297752 A CN202011297752 A CN 202011297752A CN 112359712 A CN112359712 A CN 112359712A
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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
- E01D19/00—Structural or constructional details of bridges
- E01D19/04—Bearings; Hinges
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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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- 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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Abstract
The utility model provides a track traffic three-column prestressed concrete door pier and construction method thereof, includes prestressing force bent cap and three pier stud that set up along prestressing force bent cap length direction interval in proper order, the pier stud is executed on the pier stud basis, and wherein, the pier stud in the middle of being located is as middle pier stud, and two other pier studs are as the boundary pillar, the middle part of prestressing force bent cap with the top fixed connection of middle pier stud, the top of boundary pillar is executed and is had the stone pad, install the support on the stone pad, every tip of prestressing force bent cap support on the support that corresponds end boundary pillar and with correspond between the top of end boundary pillar swing joint. According to the invention, the support is reasonably adopted to movably connect the prestressed capping beam and the pier stud, so that the secondary internal force of the structure can be greatly reduced, the structure size and the number of reinforcing steel bars are optimized, and the purpose of optimizing design is achieved. The three-column prestressed concrete door type pier structure is particularly suitable for three-column prestressed concrete door type pier structures with good foundation conditions and short pier heights, and can be popularized to beam-column prestressed concrete door type pier structures.
Description
Technical Field
The invention relates to the field of bridge engineering, in particular to a three-column prestressed concrete gate-type pier for rail transit and a construction method thereof.
Background
Present gate-type mound adopts full rigid connection gate-type mound, to the prestressed concrete gate-type mound of full rigid connection, three column type gate-type mound especially, because its hyperstatic number of times is higher, when the pier stud is shorter or basic condition is better, rigid connection structure dead weight, train live load can produce the structure internal force, temperature, shrink creep, subside and prestressing force effect also can produce not neglectable secondary internal force to cause certain difficulty to the design of prestressing force bent cap and pier stud, compare with traditional two column type gate-type mounds, three column type gate-type mound leap ability is stronger. Especially when two track traffic lines cross higher level town road, two post gate-type piers often can not satisfy the requirement, if arrange two post gate-type piers side by side this moment, not only extravagant material, influence pleasing to the eye moreover, socioeconomic effect is relatively poor.
Disclosure of Invention
In view of the technical defects and technical disadvantages in the prior art, the embodiments of the present invention provide a rail transit three-column prestressed concrete gate pier and a method for constructing the same, which overcome or at least partially solve the above problems, and the specific scheme is as follows:
the invention provides a rail transit three-column prestressed concrete gate pier which comprises a prestressed capping beam and three pier columns sequentially arranged at intervals along the length direction of the prestressed capping beam, wherein the pier column positioned in the middle is used as a middle pier column, the other two pier columns are used as side columns, the middle part of the prestressed capping beam is fixedly connected with the top of the middle pier column, the left end part and the right end part of the prestressed capping beam are respectively supported on the tops of the two side columns, and each end part of the prestressed capping beam is movably connected with the top of the side column at the corresponding end.
Furthermore, a cushion stone is applied to the top of the side column, a support is installed on the cushion stone, and the end part of the prestress cover beam is supported on the support of the corresponding end side column.
Furthermore, a plurality of supports are installed on each cushion stone, the supports are arranged on the cushion stones at intervals along the bridge direction, and the end parts of the prestress cover beams are supported on the supports on the corresponding end side columns and are movably connected with the supports.
Furthermore, two supports are mounted on each cushion stone and are respectively mounted on two sides of the cushion stone along the direction along the bridge direction.
Further, the support is a cylindrical support.
Further, the pier stud is applied to the pier stud foundation.
As a second aspect of the present invention, there is provided a rail transit three-column prestressed concrete gate pier construction method, including:
step 1, constructing a pier stud foundation;
and 3, constructing the prestressed capping beam, fixedly connecting the middle part of the prestressed capping beam with the top of the middle pier stud, respectively supporting the left end part and the right end part on the tops of the two side studs, and movably connecting each end part with the top of the corresponding end side stud.
Further, step 2 further comprises the step of constructing a cushion stone on the top of the side column, installing a support on the cushion stone, and in step 3, the end part of the prestressed cover beam is supported on the support of the corresponding end side column.
The invention has the following beneficial effects:
this patent make full use of structure atress characteristics has proposed a track traffic three-column prestressed concrete gate-type mound structural style, can be applied to and stride across the ability and require highly, the great gate-type mound structure of pier stud foundation rigidity, and its advantage and creativity mainly embody in following several aspects:
(1) the gate-type pier adopts a three-column design, is particularly suitable for multiple rail traffics to cross municipal roads simultaneously, and can simultaneously meet the road driving requirements and the crossing requirements of the multiple rail traffics as each pier column is arranged in a green belt;
(2) when the pier height is lower, perhaps when basic rigidity is great, set up the support in the crossing position of the both sides post of three-column prestressed concrete gate pier and prestressing force bent cap, can reduce the hyperstatic number of times of structure, effectively reduce the inferior internal force that temperature, shrink creep and prestressing force effect produced, optimize structural design:
the stress of the prestressed capping beam can be optimized, prestressed reinforcing steel bars of the prestressed capping beam are saved, and the height of the prestressed capping beam can be further reduced;
the bending moment of the pier stud can be reduced, so that the size of the pier stud is reduced, and the using amount of steel bars of the pier stud is saved;
and thirdly, the bending moment of the bearing platform bottom can be reduced, the foundation design is optimized, the stress of the foundation base is reduced and enlarged, or the number of foundation piles and the pile length are reduced.
(3) In the three-column portal pier, the supports are arranged on the tops of two side columns, and the middle pier column is fixedly connected with the prestressed capping beam, so that the stability of the prestressed capping beam structure is ensured while the secondary internal force of the structure is released;
(4) compared with two double-column type gate piers, the three-column type gate pier structure is light and attractive, meets the requirement of the urban bridge structure on attractiveness, and can save material.
Drawings
Fig. 1 is a schematic front structural view of a rail transit three-column prestressed concrete gate pier provided by an embodiment of the present invention;
FIG. 2 is a top view of a side post according to an embodiment of the present invention;
in the figure: 1-prestressed capping beam, 2-support, 3-pad stone, 4-pier stud and 5-foundation.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the present invention, and not all 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.
As shown in fig. 1-2, as a first embodiment of the present invention, there is provided a rail transit three-column prestressed concrete gate-type pier, comprising a prestressed capping beam 1 and three piers 4 sequentially arranged at intervals along the length direction of the prestressed capping beam 1, wherein the piers 4 are applied on a pier foundation 5, wherein, the pier column 4 positioned in the middle is used as a middle pier column, the other two pier columns 4 are used as side columns, the middle part of the prestressed capping beam 1 is fixedly connected with the top of the middle pier column, the left end part and the right end part of the prestressed capping beam 1 are respectively supported on the tops of two side columns, each end part of the prestressed capping beam 1 is movably connected with the top of the side column at the corresponding end, and as the prestressed capping beam 1 is movably connected with the side columns, i.e., relative movement can be generated between both end portions of the prestressed capping beam 1 and the piers 4 at both sides, and therefore, the secondary internal force of the structure generated by the deformation of the prestressed capping beam 1 in the transverse direction can be greatly reduced.
Wherein, the top of the side column is provided with a cushion stone 3, each cushion stone 3 is provided with two supports 2 which are respectively arranged at two sides of the cushion stone 3 along the bridge direction, the end part of the prestressed capping beam 1 is supported on the two supports 2 on the corresponding end side column and is movably connected with the two supports 2, wherein, the supports 2 are preferably columnar supports.
The supports 2 are arranged on the column tops of the two side edges of the three-column portal pier, and the social and economic benefits of the structural form are mainly shown in the following points; (1) the stress of the prestressed capping beam 1 can be optimized, so that the prestressed reinforcement of the prestressed capping beam 1 is saved, and the height of the capping beam can be further reduced when the clearance is limited; (2) the bending moment of the pier stud 4 can be reduced, so that the size of the pier stud 4 is reduced, and the using amount of reinforcing steel bars of the pier stud 4 is saved; (3) the bending moment of the bottom of the bearing platform can be reduced, the design of the foundation 5 is optimized, the stress of the foundation 5 is enlarged, or the pile number and the pile length of the pile foundation 5 are reduced. (4) The gate-type pier structure is light and attractive, and is suitable for the requirement of urban bridge structures on attractiveness.
The gate pier is an integral statically indeterminate structure formed by rigidly connecting the prestressed capping beam 1 and the pier stud 4, the prestressed capping beam 1 and the pier stud 4 bear upper structural load together, the stress of the prestressed capping beam 1 is similar to the midspan of a continuous beam, the bending moment is negative at the joint of the pier stud 4 and the prestressed capping beam 1, and the bending moment is positive in the middle of the prestressed capping beam 1; the bending moments of the pier stud 4 are linearly distributed. For the prestressed concrete door-type pier which is completely and rigidly connected, because the hyperstatic times of the prestressed concrete door-type pier are higher, internal force can be generated on the prestressed capping beam 1 and the pier stud 4 by a beam body, a train and the like, and non-negligible internal force can be generated on the structure under the action of temperature, sedimentation and prestress, so that certain difficulty is caused on the design of the prestressed capping beam 1 and the pier stud 4. The prestressed capping beam 1 and the side columns are movably connected reasonably by the support 2, so that the secondary internal force of the structure can be greatly reduced, the structural size and the number of reinforcing steel bars are optimized, and the purpose of optimizing the design is achieved.
As a second embodiment of the present invention, there is provided a method for constructing a rail transit three-column prestressed concrete gate pier, the method including:
step 1, constructing a pier stud foundation 5;
and 3, constructing the prestressed capping beam 1, fixedly connecting the middle part of the prestressed capping beam 1 with the top of the middle pier stud 4, respectively supporting the left end part and the right end part on the tops of the two side studs, and movably connecting each end part with the top of the corresponding end side stud.
In recent years, rail transit is rapidly developed, and due to the requirement of line arrangement, intersection of a newly-built line and existing pipelines of railways, highways, oil, gas, water, electricity and the like becomes more and more common. When the intersection angle of the line and the existing road is not large or the ground is difficult to arrange, the gate-type piers can well solve the problems, and the gate-type piers are economical and practical and can shorten the construction period. To 5 great rigidity of basis, and the lower three-column gate-type mound of pier height, the structure time internal force effect is obvious, often has certain difficulty in the design, sets up support 2 in gate-type mound prestressing force bent cap 1 and pier stud 4 department this moment, makes prestressing force bent cap 1 and pier stud 4 movable connection through support 2, can the optimal design, once promote, can obtain extensive acceptance and application.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (8)
1. The utility model provides a track traffic three-column prestressed concrete door pier, its characterized in that includes prestressing force bent cap and follows three pier stud that prestressing force bent cap length direction interval set gradually, wherein, is located pier stud in the middle of as middle pier stud, and other two pier studs are as the limit post, the middle part of prestressing force bent cap with the top fixed connection of middle pier stud, two tip supports respectively on the top of both sides post about the prestressing force bent cap, move between every tip of prestressing force bent cap and the top that corresponds the end limit post and be connected.
2. The rail transit three-column prestressed concrete gate pier of claim 1, wherein a bolster is applied to the top of said side column, a support is installed on said bolster, and the end of said prestressed capping beam is supported on the support of the corresponding end side column.
3. The rail transit three-column prestressed concrete gate pier of claim 2, wherein a plurality of supports are installed on each of the curbstones, the plurality of supports are spaced apart from each other in the bridge-wise direction, and ends of the prestressed cover beams are supported on the plurality of supports on the corresponding end side columns and are movably connected to the plurality of supports.
4. The rail transit three-column prestressed concrete gate pier of claim 3, wherein two supports are installed on each of the two bolsters, and are installed on both sides of the two bolsters in the bridge-wise direction.
5. The rail transit three-column prestressed concrete gate pier according to claim 3 or 4, wherein said support is a column support.
6. The rail transit three-column prestressed concrete gate pier of claim 1, wherein said pier is applied to a pier foundation.
7. A construction method of a rail transit three-column prestressed concrete gate pier is characterized by comprising the following steps:
step 1, constructing a pier stud foundation;
step 2, constructing a pier column, and installing the pier column on a pier column base, wherein the pier column comprises side columns positioned at two sides and a middle pier column positioned between the two side columns;
and 3, constructing the prestressed capping beam, fixedly connecting the middle part of the prestressed capping beam with the top of the middle pier stud, respectively supporting the left end part and the right end part on the tops of the two side studs, and movably connecting each end part with the top of the corresponding end side stud.
8. The method for constructing a rail transit three-column prestressed concrete gate pier according to claim 7, wherein the step 2 further comprises applying a pad stone on the top of the side column, and installing a support on the pad stone, and the end of the prestressed capping beam is supported on the support of the corresponding end side column in the step 3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011297752.0A CN112359712A (en) | 2020-11-18 | 2020-11-18 | Three-column prestressed concrete gate pier for rail transit and construction method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011297752.0A CN112359712A (en) | 2020-11-18 | 2020-11-18 | Three-column prestressed concrete gate pier for rail transit and construction method thereof |
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| Publication Number | Publication Date |
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| CN112359712A true CN112359712A (en) | 2021-02-12 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202011297752.0A Pending CN112359712A (en) | 2020-11-18 | 2020-11-18 | Three-column prestressed concrete gate pier for rail transit and construction method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113026542A (en) * | 2021-03-22 | 2021-06-25 | 中国铁路设计集团有限公司 | Frame pier structure with one end fixedly connected and one end movable and construction method thereof |
| CN113863111A (en) * | 2021-09-22 | 2021-12-31 | 中铁第四勘察设计院集团有限公司 | Bridge structure |
-
2020
- 2020-11-18 CN CN202011297752.0A patent/CN112359712A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113026542A (en) * | 2021-03-22 | 2021-06-25 | 中国铁路设计集团有限公司 | Frame pier structure with one end fixedly connected and one end movable and construction method thereof |
| CN113863111A (en) * | 2021-09-22 | 2021-12-31 | 中铁第四勘察设计院集团有限公司 | Bridge structure |
| CN113863111B (en) * | 2021-09-22 | 2023-08-04 | 中铁第四勘察设计院集团有限公司 | Bridge structure |
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