CN108867410A - The ribbed arch bridge ruggedized construction and method combined based on UHPC and presstressed reinforcing steel - Google Patents
The ribbed arch bridge ruggedized construction and method combined based on UHPC and presstressed reinforcing steel Download PDFInfo
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- CN108867410A CN108867410A CN201810789989.7A CN201810789989A CN108867410A CN 108867410 A CN108867410 A CN 108867410A CN 201810789989 A CN201810789989 A CN 201810789989A CN 108867410 A CN108867410 A CN 108867410A
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- armored 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
- 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
- E01D4/00—Arch-type 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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- 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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- Structural Engineering (AREA)
- Bridges Or Land Bridges (AREA)
Abstract
The invention discloses a kind of ribbed arch bridge ruggedized constructions combined based on UHPC and presstressed reinforcing steel, and including two skewbacks and the ribbed arch being arranged between two skewbacks, innovation is：The ribbed arch bridge ruggedized construction is made of two sections of armored concrete cuffs and two groups of deformed bars；The end face of armored concrete cuff one end is contacted with skewback end face, and the armored concrete cuff other end extends in the middle part of haunch；Two sections of armored concrete cuffs are symmetrical arranged；Deformed bar is embedded in the upside of ribbed arch in armored concrete cuff, and the concrete of armored concrete cuff uses ultra-high performance concrete.The method have the benefit that：A kind of ribbed arch bridge ruggedized construction and method combined based on UHPC and presstressed reinforcing steel is proposed, compared with the prior art, the program has better consolidation effect.
Description
Technical field
The present invention relates to a kind of ribbed arch bridge reinforcement technique more particularly to a kind of ribs combined based on UHPC and presstressed reinforcing steel
Arch bridge reinforcing structure and method.
Background technique
For the prior art when carrying out reinforcing punishment to ribbed arch bridge, common reinforcement means mainly has Enlargement of Section and external
Two kinds of electrothermal prestressing；Common Enlargement of Section generallys use normal concrete, compared to ultra-high performance concrete, common coagulation
The intensity of soil is relatively low, causes reinforcing layer size larger, and newly-increased dead load is larger to the loss of bearing capacity, and consolidation effect is unknown
Aobvious, bearing capacity is difficult to effectively improve, simultaneously as normal concrete elasticity modulus is lower, by rigidity distribution principle it is found that
Newly-increased section shares that load is less, is unfavorable for the raising of arch bridge total bearing capacity；Added using existing external prestressing method
Gu when, it usually needs the through-hole for anchoring prestress reinforcing bar is drilled through on former arch ring, it is larger to original structure damage, and work of constructing
Skill is complicated, and risk is higher, while the etching problem of external prestressing steels also can not look down upon.
Summary of the invention
For the problems in background technique, a kind of ribbed arch bridge combined based on UHPC and presstressed reinforcing steel is inventors herein proposed
Ruggedized construction and method.
Wherein, ribbed arch bridge ruggedized construction scheme is：
Including two skewbacks and the ribbed arch being arranged between two skewbacks, innovation is：The ribbed arch bridge ruggedized construction
It is made of two sections of armored concrete cuffs and two groups of deformed bars；The left side of first armored concrete cuff and left side skewback
End face contact, the right end of the first armored concrete cuff extends in the middle part of the left waist of ribbed arch；Second armored concrete cuff
Right side is contacted with the end face of right side skewback, and the left end of the second armored concrete cuff extends in the middle part of the right waist of ribbed arch；It is described
Corresponding region on ribbed arch is wrapped in interior by armored concrete cuff；It is embedded in armored concrete cuff and deformed bar
The bellows matched, bellows are located on the upside of ribbed arch, and the left side of armored concrete cuff is connected to by bellows with right side；It is described
Deformed bar is arranged in bellows, and the left end of the first deformed bar is anchored on the skewback of left side, the first deformed bar
Right end be anchored on the right side of the first armored concrete cuff, the right end of the second deformed bar be anchored at right side skewback
On, the left end of the second deformed bar is anchored on the left side of the second armored concrete cuff；The deformed bar is in
Tensile state；The concrete of the armored concrete cuff uses ultra-high performance concrete.
The scheme of ribbed arch bridge reinforcement means is：
Including two skewbacks and the ribbed arch being arranged between two skewbacks, innovation is：The ribbed arch bridge reinforcement means
Including：1) one end of deformed bar is anchored on skewback end face；2) by bellows-sheathed outside deformed bar；3) in ribbed arch
Outer banding steel cage, and bellows and steel reinforcement cage are fixed；4) formwork for placing is installed outside steel reinforcement cage, then into formwork for placing
It pours ultra-high performance concrete and obtains armored concrete cuff after ultra-high performance concrete solidification；5) to the another of deformed bar
One end carries out tensioning, and after tensioning is good, to ripple ipe grout, the other end of deformed bar is then anchored at armored concrete
On the end face of cuff, reinforces and complete；
The armored concrete cuff has two sections, and the deformed bar has two groups；A left side for first armored concrete cuff
End face is contacted with the end face of left side skewback, and the right end of the first armored concrete cuff extends in the middle part of the left waist of ribbed arch；Second steel
The right side of reinforced concrete cuff is contacted with the end face of right side skewback, and the left end of the second armored concrete cuff extends to ribbed arch
In the middle part of right waist；Corresponding region on ribbed arch is wrapped in interior by the armored concrete cuff；It is embedded in armored concrete cuff
With the matched bellows of deformed bar, bellows is located on the upside of ribbed arch, bellows by the left side of armored concrete cuff and
Right side connection；The deformed bar is arranged in bellows, and the left end of the first deformed bar is anchored on the skewback of left side,
The right end of first deformed bar is anchored on the right side of the first armored concrete cuff, the right end anchor of the second deformed bar
Gu the left end of the second deformed bar is anchored on the left side of the second armored concrete cuff on the skewback of right side.
The principle of the present invention is：
As stated in the background art, existing Enlargement of Section and external prestressing method are individually present in independent implement
Corresponding defect, inventor consider to combine two methods, make it mutually to learn from other's strong points to offset one's weaknesses；Specifically, the steel in the present invention
Reinforced concrete cuff is to increase section of respective section on ribbed arch by armored concrete cuff based on Enlargement of Section principle
Face size；Armored concrete cuff of the invention have from existing increasing section structure it is different at two, first, for making reinforcing bar
The concrete of concrete cuff is ultra-high performance concrete (i.e. UHPC), second, being provided with prestressing force in armored concrete cuff
Reinforcing bar；
About different at first：Compared to conventional concrete, the various aspects of performance of ultra-high performance concrete is all more preferable, especially
Be ultra-high performance concrete elasticity modulus it is bigger, armored concrete cuff size under the same conditions, distributed by rigidity former
Then it is found that the armored concrete cuff made of ultra-high performance concrete, can share more mobile loads (i.e. live load), together
When can also effectively reduce loss of the dead load to bearing capacity, therefore, using ultra-high performance concrete make armored concrete cuff, can
Preferably to improve reinforcing efficiency；
About different at second：The rarely seen reinforcing hand for combining Enlargement of Section and external prestressing method in the prior art
Deformed bar is arranged in section, the present invention in armored concrete cuff, and deformed bar does not need to contact with ribbed arch, can be effective
The destruction to existing Ribbed Arch Structure is reduced, meanwhile, deformed bar is arranged in armored concrete cuff, armored concrete cuff
Protecting effect can be played to deformed bar, deformed bar is prevented to be corroded, meanwhile, deformed bar is also to reinforced concrete
Native cuff plays certain protective effect, and deformed bar is located above hogback, can effectively improve armored concrete cuff
Structural strength, prevent the corresponding region local failure in armored concrete cuff, in addition, ultra-high performance concrete production steel
After reinforced concrete cuff is made, the later period almost no longer shrinks, it is possible to prevente effectively from the loss of prestress of deformed bar, makes pre-
The prestressing force of stress reinforcing bar is permanently effective.
Preferably, the steel fibre volume content of the ultra-high performance concrete is not less than not less than 2%, compression strength
150MPa, tensile strength are not less than 4MPa not less than 5MPa, cracking strength.
Preferably, if the size of ribbed arch arch ring in the horizontal direction is L, the armored concrete cuff (1) is in level side
Upward size is less than L/4.
The method have the benefit that：Propose a kind of ribbed arch bridge reinforcing combined based on UHPC and presstressed reinforcing steel
Structure and method, compared with the prior art, the program have better consolidation effect.
Detailed description of the invention
Fig. 1, structure section schematic diagram of the invention；
Ruggedized construction schematic diagram (deformed bar is not shown in the figure) on the left of Fig. 2, ribbed arch；
Fig. 3, position schematic cross-section (deformed bar is not shown in the figure) is reinforced；
Title corresponding to each label is respectively in figure：Armored concrete cuff 1, deformed bar 2, skewback 3, ribbed arch
4, it is used to form the vertical muscle 5 of steel reinforcement cage, the bar planting 6 of steel reinforcement cage is used to form, is used to form the stirrup 7 of steel reinforcement cage.
Specific embodiment
A kind of ribbed arch bridge ruggedized construction combined based on UHPC and presstressed reinforcing steel, including two skewbacks and setting are at two
Ribbed arch between skewback, innovation are：The ribbed arch bridge ruggedized construction is by two sections of armored concrete cuffs 1 and two groups of prestressing force
Reinforcing bar 2 forms；The left side of first armored concrete cuff 1 is contacted with the end face of left side skewback, the first armored concrete cuff 1
Right end extend in the middle part of the left waist of ribbed arch；The right side of second armored concrete cuff 1 is contacted with the end face of right side skewback, the
The left end of two armored concrete cuffs 1 extends in the middle part of the right waist of ribbed arch；The armored concrete cuff 1 will be corresponding on ribbed arch
In region is wrapped in；It is embedded in armored concrete cuff 1 and is located at ribbed arch with the matched bellows of deformed bar 2, bellows
The left side of armored concrete cuff 1 is connected to by upside, bellows with right side；The deformed bar 2 is arranged in bellows
Interior, the left end of the first deformed bar 2 is anchored on the skewback of left side, and the right end of the first deformed bar 2 is anchored at the first reinforcing bar
On the right side of concrete cuff 1, the right end of the second deformed bar 2 is anchored on the skewback of right side, the second deformed bar 2
Left end is anchored on the left side of the second armored concrete cuff 1；The deformed bar 2 is in tensile state；The reinforcing bar
The concrete of concrete cuff 1 uses ultra-high performance concrete.
Further, the steel fibre volume content of the ultra-high performance concrete is not less than not less than 2%, compression strength
150MPa, tensile strength are not less than 4MPa not less than 5MPa, cracking strength.
Further, if the size of ribbed arch arch ring in the horizontal direction is L, the armored concrete cuff 1 is in level side
Upward size is less than L/4.
A kind of ribbed arch bridge reinforcement means combined based on UHPC and presstressed reinforcing steel, including two skewbacks and setting are at two
Ribbed arch between skewback, innovation are：The ribbed arch bridge reinforcement means includes：1) one end of deformed bar 2 is anchored at
On skewback end face；2) by bellows-sheathed outside deformed bar 2；3) banding steel cage outside ribbed arch, and by bellows and reinforcing bar
Cage is fixed；4) formwork for placing is installed outside steel reinforcement cage, ultra-high performance concrete is then poured into formwork for placing, very-high performance is mixed
After solidifying soil solidification, armored concrete cuff 1 is obtained；5) tensioning, after tensioning is good, Xiang Bo are carried out to the other end of deformed bar 2
Then the other end of deformed bar 2 is anchored on the end face of armored concrete cuff 1 by line ipe grout, reinforce and complete；
The armored concrete cuff 1 has two sections, and the deformed bar 2 has two groups；First armored concrete cuff 1
Left side is contacted with the end face of left side skewback, and the right end of the first armored concrete cuff 1 extends in the middle part of the left waist of ribbed arch；Second
The right side of armored concrete cuff 1 is contacted with the end face of right side skewback, and the left end of the second armored concrete cuff 1 extends to rib
In the middle part of the right waist of arch；Corresponding region on ribbed arch is wrapped in interior by the armored concrete cuff 1；In armored concrete cuff 1
It is embedded with and is located on the upside of ribbed arch with the matched bellows of deformed bar 2, bellows, bellows is by armored concrete cuff 1
Left side is connected to right side；The deformed bar 2 is arranged in bellows, and the left end of the first deformed bar 2 is anchored at
On the skewback of left side, the right end of the first deformed bar 2 is anchored on the right side of the first armored concrete cuff 1, and second answers in advance
The right end of power reinforcing bar 2 is anchored on the skewback of right side, and the left end of the second deformed bar 2 is anchored at the second armored concrete cuff 1
Left side on.
Further, the steel fibre volume content of the ultra-high performance concrete is not less than not less than 2%, compression strength
150MPa, tensile strength are not less than 4MPa not less than 5MPa, cracking strength.
Further, if the size of ribbed arch arch ring in the horizontal direction is L, the armored concrete cuff 1 is in level side
Upward size is less than L/4.
By taking an across footpath is the ribbed arch bridge of 40m as an example, calculating is respectively adopted C50 armored concrete cuff and reinforces, is external pre-
Stress reinforcing (sets 6 Фs15.2、fpk=1860MPa steel strand wires, stretching force 1395MPa) and UHPC prestressing force of the invention
Cuff (sets 4 Фs15.2、fpk=1860MPa steel strand wires, stretching force 1395MPa) arch springing section is held under three kinds of reinforcing modes
Power is carried, consolidation effect is compared：Arch rib original sectional dimension is 0.3m × 0.6m, and sectional dimension is 0.46 × 0.86m, arch rib after reinforcing
Lateral reinforcement is in bias with a thickness of 0.18m, soffit reinforcing layer with a thickness of 0.08m, hogback reinforcing layer with a thickness of 0.08m, arch springing
Pressured state, arch springing section are destroyed and are often as that arch springing section hogging moment is excessive to be caused, it is assumed that in three kinds of reinforcing mode lower arches
Foot section axle power is 3000kN, calculates separately three kinds of reinforcing mode lower section anti-bending bearing capacities, as a result as shown in the table.
| Reinforcing mode | Anti-bending bearing capacity (kNm) | Anti-bending bearing capacity improves coefficient |
| C50 armored concrete cuff is reinforced | 528.7 | 1.00 |
| External prestressing strengthening | 796.8 | 1.51 |
| UHPC prestressing force cuff is reinforced | 1422.0 | 2.69 |
As seen from the table, using arch springing section bearing capacity after external prestressing strengthening than conventional C50 armored concrete cuff
Reinforcing improves 1.51 times, and arch springing section bearing capacity ratio uses routine side after being reinforced using novel reinforced construction proposed by the present invention
Formula reinforcing improves 2.69 times；The above results illustrate under same loading condition, proposed by the present invention novel reinforced to be configured to
Arch bridge bearing capacity is significantly improved, bridge durability and service life are improved in the crack for effectivelying prevent hogback to generate due to hogging moment,
With good engineering application value.
Claims (6)
1. a kind of ribbed arch bridge ruggedized construction combined based on UHPC and presstressed reinforcing steel, including two skewbacks and setting are encircleed at two
Ribbed arch between seat, it is characterised in that：The ribbed arch bridge ruggedized construction is by two sections of armored concrete cuffs (1) and two groups of prestressing force
Reinforcing bar (2) composition；The left side of first armored concrete cuff (1) is contacted with the end face of left side skewback, the first armored concrete
The right end of cuff (1) extends in the middle part of the left waist of ribbed arch；The right side of second armored concrete cuff (1) and the end of right side skewback
Face contact, the left end of the second armored concrete cuff (1) extend in the middle part of the right waist of ribbed arch；The armored concrete cuff (1)
Corresponding region on ribbed arch is wrapped in interior；It is embedded in armored concrete cuff (1) and deformed bar (2) matched ripple
Pipe, bellows are located on the upside of ribbed arch, and the left side of armored concrete cuff (1) is connected to by bellows with right side；It is described pre- to answer
Power reinforcing bar (2) is arranged in bellows, and the left end of the first deformed bar (2) is anchored on the skewback of left side, the first prestress steel
The right end of muscle (2) is anchored on the right side of the first armored concrete cuff (1), the right end anchoring of the second deformed bar (2)
On the skewback of right side, the left end of the second deformed bar (2) is anchored on the left side of the second armored concrete cuff (1)；Institute
It states deformed bar (2) and is in tensile state；The concrete of the armored concrete cuff (1) uses ultra-high performance concrete.
2. the ribbed arch bridge ruggedized construction according to claim 1 combined based on UHPC and presstressed reinforcing steel, it is characterised in that：
The steel fibre volume content of the ultra-high performance concrete is not small not less than 150MPa, tensile strength not less than 2%, compression strength
It is not less than 4MPa in 5MPa, cracking strength.
3. the ribbed arch bridge ruggedized construction according to claim 1 or 2 combined based on UHPC and presstressed reinforcing steel, feature are existed
In：If the size of ribbed arch arch ring in the horizontal direction is L, the size of the armored concrete cuff (1) in the horizontal direction is small
In L/4.
4. a kind of ribbed arch bridge reinforcement means combined based on UHPC and presstressed reinforcing steel, including two skewbacks and setting are encircleed at two
Ribbed arch between seat, it is characterised in that：The ribbed arch bridge reinforcement means includes：1) one end of deformed bar (2) is anchored at
On skewback end face；2) by bellows-sheathed deformed bar (2) outside；3) banding steel cage outside ribbed arch, and by bellows and steel
Muscle cage is fixed；4) formwork for placing is installed outside steel reinforcement cage, ultra-high performance concrete, very-high performance are then poured into formwork for placing
After concrete setting, armored concrete cuff (1) is obtained；5) tensioning is carried out to the other end of deformed bar (2), tensioning is good
Afterwards, to ripple ipe grout, then the other end of deformed bar (2) is anchored on the end face of armored concrete cuff (1),
It reinforces and completes；
The armored concrete cuff (1) has two sections, and the deformed bar (2) has two groups；First armored concrete cuff (1)
Left side contacted with the end face of left side skewback, the right end of the first armored concrete cuff (1) extends in the middle part of the left waist of ribbed arch；
The right side of second armored concrete cuff (1) is contacted with the end face of right side skewback, the left end of the second armored concrete cuff (1)
It extends in the middle part of the right waist of ribbed arch；Corresponding region on ribbed arch is wrapped in interior by the armored concrete cuff (1)；Reinforced concrete
It is embedded in native cuff (1) and is located at ribbed arch upside with deformed bar (2) matched bellows, bellows, bellows is by reinforcing bar
The left side of concrete cuff (1) is connected to right side；The deformed bar (2) is arranged in bellows, the first prestressing force
The left end of reinforcing bar (2) is anchored on the skewback of left side, and the right end of the first deformed bar (2) is anchored at the first armored concrete cuff
(1) on right side, the right end of the second deformed bar (2) is anchored on the skewback of right side, the left end of the second deformed bar (2)
It is anchored on the left side of the second armored concrete cuff (1).
5. the ribbed arch bridge reinforcement means according to claim 4 combined based on UHPC and presstressed reinforcing steel, it is characterised in that：
The steel fibre volume content of the ultra-high performance concrete is not small not less than 150MPa, tensile strength not less than 2%, compression strength
It is not less than 4MPa in 5MPa, cracking strength.
6. the ribbed arch bridge reinforcement means according to claim 4 or 5 combined based on UHPC and presstressed reinforcing steel, feature are existed
In：If the size of ribbed arch arch ring in the horizontal direction is L, the size of the armored concrete cuff (1) in the horizontal direction is small
In L/4.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810789989.7A CN108867410A (en) | 2018-07-18 | 2018-07-18 | The ribbed arch bridge ruggedized construction and method combined based on UHPC and presstressed reinforcing steel |
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| CN201810789989.7A CN108867410A (en) | 2018-07-18 | 2018-07-18 | The ribbed arch bridge ruggedized construction and method combined based on UHPC and presstressed reinforcing steel |
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| CN112813792A (en) * | 2021-02-22 | 2021-05-18 | 重庆交通大学 | Method for reinforcing arch bridge by combination of UHPC injection and bar planting |
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| CN110424245B (en) * | 2019-08-08 | 2021-08-27 | 中铁二十局集团第一工程有限公司 | Large-span tied arch bridge reconstruction method based on bridge hydraulic jacking system |
| CN111778881A (en) * | 2020-08-10 | 2020-10-16 | 广西交科集团有限公司 | Method for reinforcing arch springing section of box arch by combining fiber woven mesh reinforcement and ECC (error correction code) with single-side enlarged cross section |
| CN111827147A (en) * | 2020-08-10 | 2020-10-27 | 广西交科集团有限公司 | Box-type arch bridge splicing section and arch foot section reinforcing method |
| CN111778881B (en) * | 2020-08-10 | 2022-02-18 | 广西交科集团有限公司 | Method for reinforcing arch springing section of box arch by combining fiber woven mesh reinforcement and ECC (error correction code) with single-side enlarged cross section |
| CN114293479A (en) * | 2020-10-08 | 2022-04-08 | 四川苏博特新材料有限公司 | Concrete overpass bridge protection device and anti-collision reinforcement method thereof |
| CN112813792A (en) * | 2021-02-22 | 2021-05-18 | 重庆交通大学 | Method for reinforcing arch bridge by combination of UHPC injection and bar planting |
| CN113689765A (en) * | 2021-08-27 | 2021-11-23 | 重庆交通大学 | Test arch support platform with adjustable span and test method thereof |
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