CN112761051A - Prefabricated ultrahigh-performance concrete arch bridge and construction method thereof - Google Patents
Prefabricated ultrahigh-performance concrete arch bridge and construction method thereof Download PDFInfo
- Publication number
- CN112761051A CN112761051A CN202110005440.6A CN202110005440A CN112761051A CN 112761051 A CN112761051 A CN 112761051A CN 202110005440 A CN202110005440 A CN 202110005440A CN 112761051 A CN112761051 A CN 112761051A
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- arch
- arch rib
- bridge
- rib
- performance 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
- E01D4/00—Arch-type bridges
-
- 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
-
- 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
-
- 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
Abstract
The invention discloses a prefabricated ultrahigh-performance concrete arch bridge and a construction method thereof, and belongs to the technical field of bridge construction. The arch support and the abutment are oppositely arranged and fixed with the ground, the main arch ring comprises arch ribs and cross beams of the connected arch ribs, the cross sections of the arch ribs are double-box double-chamber sections, the arch ribs are divided into a plurality of sections, construction is performed by adopting a prefabricated assembly method, the adjacent arch rib sections are connected through arch rib joints, each arch rib joint comprises an end cross beam, prestress pore paths are uniformly arranged on one end surface, far away from the arch rib sections, of each cross beam, the two adjacent end cross beams are mechanically connected through spiral steel rods, and arch rib prefabrication is realized by adopting a long-line coupling prefabrication method to ensure the construction accuracy of the arch rib joints. The invention can adopt the ultra-high performance concrete to build the arch bridge, can greatly reduce the self weight of the arch rib, increase the length of the single section of the arch rib section, and can improve the construction precision of the prefabricated assembly structure by adopting the long-line coupling prefabrication method for construction.
Description
Technical Field
The invention belongs to the technical field of bridge construction, and particularly relates to a prefabricated ultrahigh-performance concrete arch bridge and a construction method thereof.
Background
The existing middle and small span reinforced concrete arch bridge has the advantages of heavy structure self weight, high construction strength, large consumption of low-grade concrete gravel materials, poor durability and poor environmental protection. A large amount of labor force is required to be input to perform reinforcement binding on a construction site, artificial defects are easily caused, and large-scale mechanized, batch and factory production is not facilitated. The ultra-high performance concrete is a novel cement-based engineering material and has ultra-high mechanical property and durability. The arch bridge is a structure mainly under pressure, the ultra-high performance concrete has ultra-high compressive strength, and the material advantages can be exerted to the maximum extent when the ultra-high performance concrete is used for building the arch bridge. The existing construction method of the ultra-high performance concrete arch bridge is not scientific and has low construction precision.
Disclosure of Invention
The invention aims to provide a prefabricated ultrahigh-performance concrete arch bridge and a construction method thereof, which can adopt ultrahigh-performance concrete to construct the arch bridge, greatly reduce the dead weight of an arch rib, increase the length of a single-section arch rib section, and improve the construction precision of a prefabricated structure by adopting a long-line coupling prefabrication method.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
a prefabricated ultrahigh-performance concrete arch bridge comprises two arch bases, arch ribs, two abutment platforms and an arch building, wherein the two arch bases are oppositely arranged and fixed with the ground, the two abutment platforms are respectively positioned at two sides of the arch bases, two ends of a main arch ring are respectively connected with the two arch bases, the arch building is arranged on the main arch ring and the abutment platforms, the prefabricated ultrahigh-performance concrete arch bridge is characterized in that the main arch ring comprises a cross beam and two arch ribs connected through the cross beam, the cross section of each arch rib is a double-box double-chamber type cross section, each arch rib comprises a plurality of arch rib sections, the prefabricated ultrahigh-performance concrete arch bridge is manufactured in a prefabricated construction mode, the adjacent arch rib sections are connected through arch rib joints, each arch rib joint comprises an end cross beam, and prestressed pore channels are uniformly arranged on one end surface of the cross beam, which is far away from the arch rib sections, and the prestressed pore channels are enclosed into a rectangle, the prestressed duct is internally provided with a prestressed pipeline and an anchor backing plate, and two adjacent end cross beams are connected through a spiral steel bar.
Furthermore, the end part of the arch leg section of the arch rib is provided with an arch rib steel plate, the arch base is provided with an arch base steel plate, and the end part of the arch leg section of the arch rib is connected with the arch base steel plate by welding and foundation bolts.
Furthermore, a man hole is formed in the arch rib segment close to the end cross beam and used as a passage for people and equipment during installation of the arch rib.
Further, the prestressed pipeline is a corrugated pipe.
A construction method of a prefabricated ultrahigh-performance concrete arch bridge comprises the following steps:
s1, prefabricating arch ribs by adopting a horizontal pouring method, wherein the prefabrication sequence comprises two ends and the middle;
s2, prefabricating adjacent arch rib sections by adopting a coupling prefabrication method and a steel template, removing the template after the sections have certain strength, and manufacturing another section by using the end of the arch rib section as an end template of another section;
s3, prefabricating the prestressed pipeline, namely, installing the prestressed pipeline of the other section of end head in a one-to-one correspondence mode by taking the prestressed pore channel on the first finished section of end head as a reference, inserting a spiral steel bar slightly smaller than the prestressed pipeline on the first finished section of end head prestressed pipeline, inserting the prestressed pipeline embedded parts of the other section of end head into the spiral steel bars in a one-to-one correspondence mode, and then installing a template and pouring concrete;
s4, the bridge is hung by a bracket or a non-bracket hanging method according to the span, wherein the hanging sequence is that the bridge is sequentially installed from the span edge to the span center from the two sides to the middle;
s5, when the strength of the ultrahigh-performance concrete meets the design requirement, transferring the arch rib segments to a bridge site for hoisting, wherein the hoisting sequence is as follows: pre-splicing, joint structural adhesive construction, splicing, mounting a prestressed steel bar system, tensioning and grouting;
and S6, after the arch ribs on the two sides are closed, hoisting the connecting beam, and pouring wet joints.
Due to the adoption of the technical scheme, the invention has the following beneficial effects:
the invention adopts the ultra-high performance concrete as the main stress structure (arch rib) of the arch bridge, divides the arch bridge into a plurality of sections and adopts the prefabricated assembly type method to construct, thereby greatly improving the efficiency and saving the construction cost.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a top view of the arch ring of the present invention;
FIG. 3 is a layout view of the pre-stressed duct of the present invention;
fig. 4 is a schematic view of the construction of the rib joint of the present invention;
FIG. 5 is a schematic structural view of an end-to-end beam connection of the present invention.
In the drawings, there is shown in the drawings,
1-arch support, 1.1-arch rib, 1.2-beam, 2-main arch ring, 3-end beam, 4-prestressed duct, 5-spiral steel bar, 6-prestressed duct, 7-anchor backing plate and 8-man hole.
Detailed Description
The following detailed description of the present invention is provided in conjunction with the accompanying drawings, but it should be understood that the scope of the present invention is not limited to the specific embodiments.
Throughout the specification and claims, unless explicitly stated otherwise, the word "comprise", or variations such as "comprises" or "comprising", will be understood to imply the inclusion of a stated element or component but not the exclusion of any other element or component.
A prefabricated ultrahigh-performance concrete arch bridge comprises two arch bases 1, a main arch ring 2, two abutment platforms and an arch building, wherein the two arch bases 1 are oppositely arranged and fixed with the ground, the two abutment platforms are respectively positioned at two sides of the arch bases 1, two ends of the main arch ring are respectively connected with the two arch bases, the arch building is arranged on the main arch ring and the abutment platforms, the main arch ring 2 comprises a cross beam and two arch ribs 2.1 connected through the cross beam 2.2, the cross section of each arch rib is a double-box double-chamber type cross section, each arch rib comprises a plurality of arch rib sections, the arch rib is manufactured by adopting a prefabricated construction mode, the adjacent arch rib sections are connected through arch rib joints, each arch rib joint comprises an end cross beam 3, and prestress pore passages 4 are uniformly arranged on one end surface, far away from the arch rib sections, of the end cross beam 3, the prestressed duct is enclosed into a rectangle, a prestressed duct 6 and an anchor backing plate 7 are arranged in the prestressed duct, and two adjacent end cross beams are connected through a spiral steel bar.
The end part of the arch springing section of the arch rib 2.1 is provided with an arch rib steel plate, the arch base 1 is provided with an arch base 1 steel plate, and the end part of the arch springing section of the arch rib 2.1 is connected with the arch base 1 steel plate by welding and foundation bolts.
A manhole 8 is arranged at the position of the arch rib segment close to the end beam 3 and is used as a passage for personnel and equipment during installation of the arch rib 2.1.
The prestressed pipe 6 is a corrugated pipe.
A construction method of a prefabricated ultrahigh-performance concrete arch bridge comprises the following steps:
s1, prefabricating arch ribs by adopting a horizontal pouring method, wherein the prefabrication sequence comprises two ends and the middle.
S2, prefabricating the adjacent arch rib sections by adopting a coupling prefabricating method and a steel template, removing the template after the sections have certain strength, and manufacturing another section by using the end of the arch rib section as an end template of another section.
S3, prefabricating a prestressed pipeline 6, namely, installing the prestressed pipeline 6 of the other section of end in a one-to-one correspondence mode by taking a prestressed pore channel 4 on the first finished section of end as a reference, inserting a spiral steel bar 5 slightly smaller than the prestressed pipeline 6 into the first finished section of end prestressed pipeline 6, inserting embedded parts of the prestressed pipeline 6 of the other section of end into the spiral steel bar 5 in a one-to-one correspondence mode, and then installing a template and pouring concrete; in order to ensure the balanced stress of the arch bridge segment and avoid stress concentration, the joint butt-joint surfaces of the arch rib segments must be tightly jointed. The pre-stressed ducts 6 must be precisely aligned between the end beams 3.
S4, the bridge is hung by a support or a non-support hanging method according to the span size, wherein the hanging sequence is that the bridge is sequentially installed from the span edge to the span center from the two sides to the middle.
S5, when the strength of the ultrahigh-performance concrete meets the design requirement, transferring the arch rib segments to a bridge site for hoisting, wherein the hoisting sequence is as follows: pre-splicing, joint structural adhesive construction, splicing, mounting a prestressed steel bar system, tensioning and grouting.
And S6, after the arch ribs on the two sides are closed, hoisting the connecting beam, and pouring wet joints.
The above description is directed to the preferred embodiments of the present invention, but the embodiments are not intended to limit the scope of the claims of the present invention, and all equivalent changes and modifications made within the technical spirit of the present invention should fall within the scope of the claims of the present invention.
Claims (5)
1. A prefabricated ultrahigh-performance concrete arch bridge comprises two arch bases, arch ribs, two abutment platforms and an arch building, wherein the two arch bases are oppositely arranged and fixed with the ground, the two abutment platforms are respectively positioned at two sides of the arch bases, two ends of a main arch ring are respectively connected with the two arch bases, the arch building is arranged on the main arch ring and the abutment platforms, the prefabricated ultrahigh-performance concrete arch bridge is characterized in that the main arch ring comprises a cross beam and two arch ribs connected through the cross beam, the cross section of each arch rib is a double-box double-chamber type cross section, each arch rib comprises a plurality of arch rib sections, the prefabricated ultrahigh-performance concrete arch bridge is manufactured in a prefabricated construction mode, the adjacent arch rib sections are connected through arch rib joints, each arch rib joint comprises an end cross beam, and prestressed pore channels are uniformly arranged on one end surface of the cross beam, which is far away from the arch rib sections, and the prestressed pore channels are enclosed into a rectangle, the prestressed duct is internally provided with a prestressed pipeline and an anchor backing plate, and two adjacent end cross beams are connected through a spiral steel bar.
2. The precast assembled ultra-high performance concrete arch bridge of claim 1, wherein a rib steel plate is provided at a toe end of the arch rib, a shoe steel plate is provided on the abutment, and the toe end of the arch rib is coupled to the shoe steel plate by welding and anchor bolts.
3. The precast assembled ultra-high performance concrete arch bridge of claim 1, wherein the arch rib segments are provided with manholes near the end beams for passage of persons and equipments when the arch rib is installed.
4. The precast assembled ultra-high performance concrete arch bridge of claim 1, wherein the prestressed pipe is a corrugated pipe.
5. A construction method of a prefabricated ultrahigh-performance concrete arch bridge is characterized by comprising the following steps:
s1, prefabricating arch ribs by adopting a horizontal pouring method, wherein the prefabrication sequence comprises two ends and the middle;
s2, prefabricating adjacent arch rib sections by adopting a long-line coupling prefabricating method and a steel formwork, removing the formwork after the sections have certain strength, and manufacturing another section by using the end of the arch rib section as an end formwork of another section;
s3, prefabricating the prestressed pipeline, namely, installing the prestressed pipeline of the other section of end head in a one-to-one correspondence mode by taking the prestressed pore channel on the first finished section of end head as a reference, inserting a spiral steel bar slightly smaller than the prestressed pipeline on the first finished section of end head prestressed pipeline, inserting the prestressed pipeline embedded parts of the other section of end head into the spiral steel bars in a one-to-one correspondence mode, and then installing a template and pouring concrete;
s4, the bridge is hung by a bracket or a non-bracket hanging method according to the span, wherein the hanging sequence is that the bridge is sequentially installed from the span edge to the span center from the two sides to the middle;
s5, when the strength of the ultrahigh-performance concrete meets the design requirement, transferring the arch rib segments to a bridge site for hoisting, wherein the hoisting sequence is as follows: pre-splicing, joint structural adhesive construction, splicing, mounting a prestressed steel bar system, tensioning and grouting;
and S6, after the arch ribs on the two sides are closed, hoisting the connecting beam, and pouring wet joints.
Priority Applications (1)
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| CN202110005440.6A CN112761051A (en) | 2021-01-05 | 2021-01-05 | Prefabricated ultrahigh-performance concrete arch bridge and construction method thereof |
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| CN202110005440.6A CN112761051A (en) | 2021-01-05 | 2021-01-05 | Prefabricated ultrahigh-performance concrete arch bridge and construction method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113323001A (en) * | 2021-06-08 | 2021-08-31 | 核工业西南勘察设计研究院有限公司 | Arch bridge thrust foundation structure and pouring method thereof |
| CN114438869A (en) * | 2022-02-16 | 2022-05-06 | 湖南大学 | Prefabricated ultrahigh-performance concrete honeycomb arch bridge structure and construction method thereof |
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Application publication date: 20210507 |