CN111926680A - Reinforced structure of single-column bridge and construction method - Google Patents
Reinforced structure of single-column bridge and construction method Download PDFInfo
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- CN111926680A CN111926680A CN202010108591.XA CN202010108591A CN111926680A CN 111926680 A CN111926680 A CN 111926680A CN 202010108591 A CN202010108591 A CN 202010108591A CN 111926680 A CN111926680 A CN 111926680A
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- 238000010276 construction Methods 0.000 title claims abstract description 12
- 230000003014 reinforcing effect Effects 0.000 claims abstract description 24
- 230000002093 peripheral effect Effects 0.000 claims description 7
- 239000000463 material Substances 0.000 claims description 5
- 238000005553 drilling Methods 0.000 claims description 4
- 229910000831 Steel Inorganic materials 0.000 description 15
- 239000010959 steel Substances 0.000 description 15
- 210000003141 lower extremity Anatomy 0.000 description 4
- 238000005336 cracking Methods 0.000 description 2
- 239000006260 foam Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000002277 temperature effect Effects 0.000 description 2
- 230000007423 decrease Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 230000000007 visual effect Effects 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
- 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
- E01D22/00—Methods or apparatus for repairing or strengthening existing bridges ; Methods or apparatus for dismantling 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
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Bridges Or Land Bridges (AREA)
Abstract
The invention relates to the technical field of bridge construction, in particular to a processing structure of a single-column bridge, which comprises two concrete brackets; the concrete box girder is arranged above the concrete bracket and is provided with a lower flange parallel to the concrete bracket; and one end of each of the at least two connecting pieces is fixedly installed in the concrete bracket, and the other end of each of the at least two connecting pieces penetrates through the lower flange to form a reinforced structure for preventing the concrete box girder from turning on one side. The invention provides a reinforcing structure of a single-column bridge, which is firm in connection and can effectively prevent the bridge from overturning, and also provides a construction method of the reinforcing structure of the single-column bridge.
Description
Technical Field
The invention relates to the technical field of bridge construction, in particular to a reinforced structure of a single-column bridge and a construction method.
Background
In urban construction, curved bridges such as urban overpasses and high-speed ramps are mostly in the form of single-column bridges, and the single-column bridges have the advantages of reducing occupied land, increasing visual field and beautifying the bridges and saving space, so that the application of the single-column bridges is also increasingly wide.
However, the existing single-column bridge adopts a single support form in the transverse bridge direction, the transverse constraint on the main beam is weak, and the transverse anti-overturning capability is insufficient particularly under large unbalanced load vehicles or earthquakes, so that a major accident of the main beam in the lateral overturning is caused.
For example, chinese patent document CN10853247U discloses an overturn-preventing reinforcing device and an installation method for a single-column pier beam, which includes a beam bottom reinforcing device, a pier overhanging steel structure device, and a rigid tie rod; wherein beam bottom reinforcing apparatus includes bedplate and otic placode and high strength bolt, is connected with beam bottom reinforcing apparatus through the one end of rigidity pull rod, and the other end is connected with bedplate and otic placode, but after rigidity pull rod is connected for a long time with bedplate, otic placode, still exist and connect insecurely, and lead to the bridge to appear the condition of toppling.
Disclosure of Invention
Therefore, the technical problem to be solved by the invention is to provide a reinforcing structure of a single-column bridge and a construction method, which are firm in connection and can effectively prevent the bridge from overturning, aiming at the defect that the bridge is overturned due to the fact that the connection structure in the prior art is not firm in connection.
In order to solve the above technical problems, the present invention provides a reinforcing structure of a single-column bridge, including:
two concrete corbels;
the concrete box girder is arranged above the concrete bracket and is provided with a lower flange parallel to the concrete bracket;
and one end of each of the at least two connecting pieces is fixedly installed in the concrete bracket, and the other end of each of the at least two connecting pieces penetrates through the lower flange to form a reinforced structure for preventing the concrete box girder from turning on one side.
Further, the reinforcing structure further includes:
the fasteners are arranged at two ends of the connecting piece and used for fixing the connecting piece;
and concrete is poured on the peripheral wall of the connecting piece and is used for being connected with the lower flange and the concrete bracket respectively.
Further, still include:
the through hole penetrates through the lower flange, and the diameter of the through hole is larger than that of the connecting piece;
the recess sets up the concrete bracket orientation one side on the bottom flange, through the mounting is pour extremely in through-hole and the recess, in order to fix the connecting piece.
Further, the diameter of the fastener arranged on one side close to the lower flange is larger than that of the through hole.
Further, the centers of the through hole and the groove are positioned on the same vertical line.
Further, a low elastic modulus material is arranged on the peripheral wall of the connecting piece.
Further, the concrete box girder further includes:
the upper flange is parallel to the lower flange and arranged above the lower flange;
and the web plate is arranged between the upper flange and the lower flange and is used for connecting the upper flange and the lower flange.
Further, still include:
the pier is arranged between the two concrete brackets and fixedly connected with the concrete brackets.
Furthermore, at least two supports are symmetrically arranged between the concrete bracket and the lower flange.
The invention also provides a construction method of the reinforced structure of the single-column bridge, which comprises the following steps:
drilling a through hole on the lower flange and forming a groove on the concrete bracket, sequentially inserting at least two connecting pieces in the through hole and the groove along the vertical direction, and pouring concrete in the through hole and the groove to form a reinforced structure for preventing the concrete box girder from turning on one side.
The technical scheme of the invention has the following advantages:
1. the reinforcing structure of the single-column bridge provided by the invention comprises two concrete brackets; the concrete box girder is arranged above the concrete bracket and is provided with a lower flange parallel to the concrete bracket; and one end of each of the at least two connecting pieces is fixedly installed in the concrete bracket, and the other end of each of the at least two connecting pieces penetrates through the lower flange to form a reinforced structure for preventing the concrete box girder from turning on one side. Through the connecting piece, directly connect into an organic whole with concrete bracket and bottom flange, the pulling force of bottom flange orientation concrete bracket direction is applyed to the connecting piece is two of symmetry setting between concrete bracket and bottom flange, has improved the stability of connecting. Through being connected the connecting piece directly with the bottom flange and concrete corbel, effectually prevented to install reinforcing apparatus on the bottom flange or concrete corbel, the rethread connecting piece is connected with concrete corbel and reinforcing apparatus respectively to avoided connecting piece and reinforcing apparatus's junction, after connecting for a long time and appear connecting insecurely, finally lead to the condition that the case roof beam turned on one's side.
2. The reinforcing structure of the single-column bridge further comprises a through hole which penetrates through the lower flange, and the diameter of the through hole is larger than that of the connecting piece; the recess sets up the concrete bracket orientation one side on the bottom flange, through the mounting is pour extremely in through-hole and the recess, in order to fix the connecting piece. The diameter of the through hole is larger than that of the connecting piece, so that the connecting piece can conveniently stretch into the through hole, and a pouring gap is reserved for concrete.
3. According to the reinforcing structure of the single-column bridge, provided by the invention, the outer peripheral wall of the connecting piece is provided with the low-elasticity-modulus material. Effectively prevents the concrete from cracking caused by the conditions of shrinkage, creep, temperature effect and the like of the concrete.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
Fig. 1 is a schematic structural view of a reinforcing structure of a single-column bridge provided by the present invention;
FIG. 2 is an enlarged view of the connector of FIG. 1;
description of reference numerals:
1-concrete box girder; 2-upper flange; 3-a web; 4-a lower flange; 5-a connector; 6-a first fastener; 7-a second fastener; 8-concrete; 9-support; 10-concrete corbel; 11-bridge pier;
Detailed Description
The technical scheme of the invention is clearly and completely described below with reference to the accompanying drawings; obviously; the described embodiments are a part of the present invention; rather than all embodiments. Based on the embodiments of the invention; all other embodiments obtained by a person skilled in the art without making any inventive step; all fall within the scope of protection of the present invention.
Furthermore; the technical features mentioned in the different embodiments of the invention described below can be combined with each other as long as they do not conflict with each other.
As shown in fig. 1-2, the reinforcing structure of the single-column bridge provided by the invention comprises two concrete corbels 10, a lower flange 4 and at least two connecting pieces 5;
the concrete box girder 1 is arranged above the concrete corbel 10 and is provided with a lower flange 4 parallel to the concrete corbel 10;
and at least two connecting pieces 5, one end of each connecting piece is fixedly arranged in the concrete bracket 10, and the other end of each connecting piece runs through the lower flange 4 to form a reinforced structure for preventing the concrete box girder 1 from turning on one side.
In this embodiment, the reinforcement structure further comprises fasteners and concrete 8;
the fasteners comprise a first fastener 6 arranged at the upper end of the steel anchor rod and a second fastener 7 arranged at the lower end of the steel anchor rod, and are used for fixing the steel anchor rod on the lower flange 4 and in the concrete corbel 10. In this embodiment, the first fastener 6 and the second fastener 7 are nuts that fit into a steel anchor rod.
And concrete 8 is poured on the peripheral wall of the connecting piece 5 and is used for respectively connecting the lower flange 4 and the concrete bracket 10. Concrete 8 is pour run through in the through-hole that the bottom flange 4 set up, with set up concrete bracket 10 orientation in the recess of one side of bottom flange 4 to fix into an organic whole with steel anchor and bottom flange 4 and concrete bracket 10, the effectual joint strength who increases steel anchor, bottom flange 4 and concrete bracket 10 three plays the effect of resistance to plucking when the horizontal toppling of concrete box girder 1 or earthquake.
In this embodiment, the diameter of through-hole is greater than the diameter of connecting piece 5, the stretching into of connecting piece 5 to the through-hole of being convenient for, also leave the clearance for the concrete simultaneously to be convenient for pour the concrete. The number of the through holes corresponds to that of the steel anchor rods, and the diameter of the through holes is determined according to actual needs.
In the present embodiment, the diameter of the fastener, i.e., the first fastener 6, disposed on the side close to the lower flange 4 is larger than the diameter of the through hole. Make first fastener 6 can be effectual fix the steel stock in the through-hole that runs through in bottom flange 4 and set up, prevent because 6 undersize of first fastener, first fastener 6 slides in to the through-hole, reduces the stability of being connected of concrete box girder 1 and concrete bracket 10, and the danger that the bridge turned on one's side appears.
The diameter of the second fastening member 7 is smaller than the recess, thereby facilitating the insertion of the second fastening member 7 into the recess.
As an alternative, the diameter of the second fastening member 7 may be equal to the diameter of the recess.
The through hole and the groove are positioned on the same vertical line. So that the steel anchor rod can smoothly pass through the through hole and enter the groove. The stress concentration applied to the steel anchor rod by the hole wall of the through hole and the groove wall of the groove and even the fracture of the steel anchor rod due to the dislocation of the through hole and the groove are avoided.
And a low elastic modulus material is arranged on the peripheral wall of the connecting piece 5. In this embodiment, the low elastic modulus material is EVA foam. The EVA foam effectively prevents concrete from cracking caused by the conditions of shrinkage, creep, temperature effect and the like of the concrete.
The shrinkage is a phenomenon in which the volume of concrete decreases when the concrete hardens in air.
Creep refers to the phenomenon that the strain of concrete increases with time under the long-term action of a certain constant load.
As shown in fig. 1, in the present embodiment, the concrete box girder 1 further includes a top girder 2 parallel to the lower flange 4 and disposed above the lower flange 4; the vehicle travels on the upper surface of the roof rail 2.
The two webs 3 are arranged between the top beam 2 and the lower flange 4, are used for connecting the top beam 2 and the lower flange 4, simultaneously play a role in supporting, and are inclined towards the center of the lower flange 4.
In the embodiment, at least two supporting seats 9 are symmetrically arranged between the concrete corbel 10 and the lower flange 4 and are arranged between two steel anchor rods. The support 9 can effectively support the lower flange 4.
The invention also provides a construction method of the reinforced structure of the single-column bridge, which comprises the following steps: drilling a through hole on the lower flange 4 and forming a groove on the concrete bracket 10, sequentially inserting at least two connecting pieces 5 in the through hole and the groove along the vertical direction, and pouring concrete 8 in the through hole and the groove to form a reinforced structure for preventing the concrete box girder 1 from turning on one side.
The specific construction process comprises the following steps: installing concrete corbels 10 on two sides of the top of a pier 11, reserving grooves on the concrete corbels 10, installing supports 9 on the concrete corbels 10, drilling through holes on a lower flange 4 of a concrete box girder 1, hoisting the concrete box girder 1 and fixing the concrete box girder on the concrete corbels 10, and keeping the axes of the through holes and the grooves on the same horizontal line; penetrating the through hole along the vertical direction by using the connecting piece 5, and then installing a second fastening piece 7, so that the second fastening piece and the connecting piece 5 are jointly inserted into the groove; concrete is poured into the through holes and the grooves respectively, and a first fastening member 6 is installed on the top of the connecting member 5, thereby fixedly connecting the concrete box girder 1 with the concrete corbel 10.
Obviously; the above embodiments are merely examples provided for clarity of illustration; and not as restrictive. To one of ordinary skill in the art; other variations and modifications may be made on the basis of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the invention.
Claims (10)
1. A reinforced structure of single-column bridge, comprising:
a concrete corbel (10) having two;
the concrete box girder (1) is arranged above the concrete corbel (10) and is provided with a lower flange (4) parallel to the concrete corbel (10);
two at least connecting pieces (5), one end fixed mounting in concrete bracket (10), the other end runs through bottom flange (4) to form and be used for preventing concrete box girder (1) turns on one's side the reinforced structure.
2. The reinforced structure of the uni-pillar bridge according to claim 1, wherein the reinforced structure further comprises:
the fasteners are arranged at two ends of the connecting piece (5) and used for fixing the connecting piece (5);
and concrete (8) is poured on the peripheral wall of the connecting piece (5) and is used for respectively connecting the lower flange (4) and the concrete bracket (10).
3. The reinforced structure of the uni-pillar bridge according to claim 2, further comprising:
the through hole penetrates through the lower flange (4), and the diameter of the through hole is larger than that of the connecting piece (5);
the groove is formed in the position, facing one side of the lower flange (4), of the concrete bracket (10), and the concrete (8) is poured into the through hole and the groove to fix the connecting piece (5).
4. The reinforcing structure of the unicolumn bridge according to claim 3, characterized in that the diameter of the fastening member provided at the side close to the lower flange (4) is larger than the diameter of the through hole.
5. The reinforcing structure of a monopod bridge, as claimed in claim 3 or 4, wherein the through hole is located on the same vertical line as the center of the recess.
6. The reinforcing structure of the monolithic bridge according to any one of claims 1 to 5, characterized in that a low elastic modulus material is provided on the outer peripheral wall of said connecting member (5).
7. The reinforced structure of the single-column bridge according to claim 6, wherein the concrete box girder (1) further comprises:
the upper flange (2) is parallel to the lower flange (4) and arranged above the lower flange (4);
and the web (3) is arranged between the upper flange (2) and the lower flange (4) and is used for connecting the upper flange (2) and the lower flange (4).
8. The reinforced structure of the uni-pillar bridge according to any one of claims 1 to 7, further comprising:
and the bridge piers (11) are arranged between the two concrete brackets (10) and are fixedly connected with the concrete brackets (10).
9. The reinforced structure of the unicolumn bridge according to claim 8, characterized in that at least two abutments (9) are symmetrically arranged between the concrete corbel (10) and the lower flange (4).
10. A construction method of a reinforced structure of a single-column bridge is characterized by comprising the following steps:
drilling a through hole on a lower flange (4) and arranging a groove on a concrete corbel (10), sequentially inserting at least two connecting pieces (5) in the through hole and the groove along the vertical direction, and pouring concrete (8) in the through hole and the groove to form a reinforcing structure for preventing the concrete box girder (1) from turning on one side.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911309101 | 2019-12-18 | ||
| CN2019113091016 | 2019-12-18 |
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| Publication Number | Publication Date |
|---|---|
| CN111926680A true CN111926680A (en) | 2020-11-13 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010108591.XA Pending CN111926680A (en) | 2019-12-18 | 2020-02-21 | Reinforced structure of single-column bridge and construction method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112663521A (en) * | 2021-01-12 | 2021-04-16 | 山西省交通科技研发有限公司 | Improvement and reconstruction method for transverse anti-overturning performance of bridge |
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|---|---|---|---|---|
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| CN203096598U (en) * | 2013-03-01 | 2013-07-31 | 河海大学 | Outer cladding type steel-concrete combined structure beam bridge overturn-resistant device |
| CN203096599U (en) * | 2013-03-01 | 2013-07-31 | 河海大学 | Tension-compression rod type anti-toppling device of steel-and-concrete-combination beam bridge |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112663521A (en) * | 2021-01-12 | 2021-04-16 | 山西省交通科技研发有限公司 | Improvement and reconstruction method for transverse anti-overturning performance of bridge |
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