CN108797359A - A kind of large span arch bridge with Stiffness frame arch ring concrete strength grading optimization method - Google Patents
A kind of large span arch bridge with Stiffness frame arch ring concrete strength grading optimization method Download PDFInfo
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- CN108797359A CN108797359A CN201810678358.8A CN201810678358A CN108797359A CN 108797359 A CN108797359 A CN 108797359A CN 201810678358 A CN201810678358 A CN 201810678358A CN 108797359 A CN108797359 A CN 108797359A
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- arch ring
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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
- E01D4/00—Arch-type bridges
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- Bridges Or Land Bridges (AREA)
Abstract
The invention discloses a kind of large span arch bridge with Stiffness frame arch ring concrete strength grading optimization method, arch ring concrete Multi-working-surface concreting layer by layer and segment by segment makes the stress of arch ring concrete gradually be superimposed；According to the stress state of each construction stage, the strength evaluation standard of arch ring concrete is formulated.It is an object of the invention to：For the problem that arch ring concrete 28d strength evaluation standards, existing influences concrete arch ring stress performance, provides a kind of large span arch bridge with Stiffness frame arch ring concrete strength grading optimization method.This method can improve the growth trend of arch ring concrete strength, to be effectively improved the stress performance of Arch Bridge Ribs.
Description
Technical field
The invention belongs to bridge construction field of engineering technology.It being directed to large span arch bridge with Stiffness frame in particular it relates to one kind
Arch ring concrete strength Interest frequency method.
Background technology
In recent years, with the rapid development of the high speed railway construction in the mountain areas such as southwest China, in railroad bridge design,
It is more and more to encounter the high mountain gorge landform that long-span arch bridge be used to be crossed over.In these areas, arch bridge has more
Good terrain adaptability.And reinforced concrete arch bridge can provide the rigidity of structure of bigger compared with steel arch bridge, stationarity of driving a vehicle and comfortable
Property is also more excellent, can more meet requirement of the high-speed railway to bridge structure；And cost more saves, advantage is larger.Therefore, armored concrete
Arch bridge is a kind of extraordinary solution of across the deep valley landform in railways in Southwestern area, also should be the scheme preferentially selected.And it is exactly
Due to reinforced concrete arch bridge have the advantages that it is above-mentioned, the bridge type China development it is also very fast.For example, just being built in 1997
At the first in the world of main span 420m greatly across concrete arch-type bridge-Wanxian Yangtze river long span arch bridge, which uses concrete filled steel tube stiffness bone
Frame external wrapping concrete method arching.The bridge is built up so that stiff skeleton method arching technology has stepped up a new step, but also
The Long Span Railway concrete arch-type bridge that scale of construction bigger is built using the technology is possibly realized.
Arch bridge is the structure based on a kind of compression, and arch ring is generally in high pressure stress after large-span concrete arch bridge Cheng Qiao
State, coagulation soil compressive stress are the key factors of control design case, thus the label of arch ring concrete it is generally higher (C60 and with
On).High-grade concrete can increase cement and additive to reach 28d intensity as defined in specification in arch ring concrete
Dosage.This arch ring concrete 28d strength evaluation standards actually affect the normal growth curve of concrete strength, to coagulation
Soil later strength development be have certain adverse effect, while also result in concrete the heat of hydration and blockage effect more
Significantly, the stress performance of concrete arch ring is influenced.
Invention content
It is an object of the invention to：For arch ring concrete 28d strength evaluation standards, existing influences concrete arch ring stress
The problem of performance, provides a kind of large span arch bridge with Stiffness frame arch ring concrete strength grading optimization method.This method can change
The growth trend of kind arch ring concrete strength, to be effectively improved the stress performance of Arch Bridge Ribs.
To achieve the goals above, the technical solution adopted by the present invention is：
A kind of large span arch bridge with Stiffness frame arch ring concrete strength grading optimization method, arch ring concrete Multi-working-surface point
Ring section is constructed, and the stress of arch ring concrete is made gradually to be superimposed；According to the stress state of each construction stage, arch ring concrete is formulated
Strength evaluation standard.The arch ring concrete constructed using stiff skeleton method divides ring section repeatedly to pour to be formed, arch ring concrete
Stress be constantly superimposed, therefore the internal stress of arch ring concrete is ever-increasing, rather than is initially in height
Compressive stress state.According to the loading characteristic, the specific stress state of arch ring concrete can be calculated according to each construction stage, and make
Its fixed strength assessment time and standard can make the intensity of concrete be in healthier growth state always in this way.
Preferably, stiff skeleton provides load support to arch ring, is based on this, is mixed using the load as arch ring is formulated
Coagulate the leveling factors of the strength evaluation standard of soil.This programme fully considers the stress influence factor of arch bridge concrete, so as to
Further promote the accuracy that arch ring concrete strength formulates standard.
Preferably, the external wrapping concrete of stiff skeleton provides load support to arch ring, is based on this, which is made
For the leveling factors of the strength evaluation standard of formulation arch ring concrete.This programme fully consider the stress influence of arch bridge concrete because
Element, so as to further promote the accuracy that arch ring concrete strength formulates standard.
Preferably, compared to arch ring concrete 28d strength evaluation standards, this method reaches arch ring after 28 days
Concrete 28d intensity.Traditional Concrete Strength Evaluation standard is more demanding to early strength of concrete, concrete 28d intensity
Design strength must be reached, the later strength development to concrete is that have certain adverse effect.This programme makes arch ring later
Reach design strength, arch ring concrete need not just reach design strength in 28d, the intensity of concrete can be made to be in always
Healthier growth state.
Preferably, by reducing the match ratio of the cement content in arch ring concrete, to realize after 28 days
Achieve the purpose that arch ring concrete 28d intensity.Since the intensity requirement to arch ring early period is not high, can suitably be reduced in concrete
The dosage of cement.The arch ring concrete scale of construction of large-span concrete arch bridge is very big, and this programme helps to reduce the water of concrete
Change heat and blockage effect, so as to avoid the generation of arch ring distress in concrete.
Preferably, by reduce arch ring concrete in additional agent content match ratio, come realize 28 days with
Achieve the purpose that arch ring concrete 28d intensity afterwards.Since the intensity requirement to arch ring early period is not high, can suitably subtract in concrete
The dosage of few additive.The arch ring concrete scale of construction of large-span concrete arch bridge is very big, and this programme helps to reduce concrete
The heat of hydration and blockage effect, so as to avoid the generation of arch ring distress in concrete.
In conclusion by adopting the above-described technical solution, compared with the prior art, the beneficial effects of the invention are as follows：Greatly
After span more degrees skeleton concrete arched bridge arch ring concrete innovatively uses " concrete strength grading rating method ", solves biography
System method excessively pursues the problem of early strength of concrete.Present invention improves the gain in strength trend of concrete, effectively carry
The high stress performance of arch ring concrete；The heat of hydration and blockage effect for also reducing concrete simultaneously, avoid arch ring concrete
The generation in crack is that a kind of large span more degrees skeleton concrete arched bridge arch ring concrete strength performance for being worth promoting on a large scale is excellent
Change method.
Specific implementation mode
In order to make the purpose , technical scheme and advantage of the present invention be clearer, with reference to embodiments, to the present invention
It is further elaborated.It should be appreciated that described herein, specific examples are only used to explain the present invention, is not used to limit
The fixed present invention.
Present embodiment discloses a kind of large span arch bridge with Stiffness frame arch ring concrete strength grading optimization method, arch ring is mixed
Solidifying soil Multi-working-surface concreting layer by layer and segment by segment, makes the stress of arch ring concrete gradually be superimposed；According to the stress state of each construction stage,
Formulate the strength evaluation standard of arch ring concrete.
Specifically, stiff skeleton provides load support to arch ring, is based on this, using the load as formulation arch ring concrete
The leveling factors of strength evaluation standard.The external wrapping concrete of stiff skeleton provides load support to arch ring, this is based on, by the load
Leveling factors as the strength evaluation standard for formulating arch ring concrete.
Specifically, compared to arch ring concrete 28d strength evaluation standards, this method reaches arch ring concrete after 28 days
28d intensity.By reducing the match ratio of the cement content in arch ring concrete, reach arch ring coagulation after 28 days to realize
The purpose of native 28d intensity.By reducing the match ratio of the additional agent content in arch ring concrete, reached after 28 days to realize
To the purpose of arch ring concrete 28d intensity.
The present embodiment is illustrated by taking certain 416m deck type reinforced concrete arch bridge as an example below：Bridge main span 416m,
Rise 99m, ratio of rise to span 1/4.2, arch ring is using three Room section of single case.Since the spanning degree is more than 400m, and it is High-speed Railway Bridges
Beam, therefore arch ring concrete square amount is more than 20000m3, the scale of construction is very big, and arch ring construction uses stiff skeleton method, arch ring outsourcing mixed
6 rings of solidifying soil point are formed, and arch ring concrete divides ring section to be formed.It the shortcomings that for large-span concrete arch bridge, is built in actual items
If large span more degrees skeleton concrete arched bridge is innovatively used " concrete strength grading rating method " in.This method is answered
With the stress performance for being effectively improved arch ring, the gain in strength trend of arch ring concrete is improved, while also reducing coagulation
The heat of hydration and blockage effect of soil, avoid the generation of arch ring distress in concrete.This programme is a kind of simple, economically and reasonably big
Span more degrees skeleton concrete arched bridge arch ring concrete quality optimization method (concrete strength grading rating method).
Arch bridge is the structure based on a kind of compression, large-span concrete arch bridge after being runed at bridge usual arch ring all in height
Compressive stress state, therefore arch ring concrete generally can all select relatively high absolute altitude (C60 or more).Traditional concrete strength
Evaluation criteria is more demanding to early strength of concrete, and concrete 28d intensity must reach design strength.The evaluation criteria is not
The own characteristic of with good grounds structure distinguishes.In order to reach the 28d intensity of concrete, just needed in the match ratio of concrete
Using more cement and additive, this way concrete gain in strength early period is very fast, but later strength is often stagflation
, it is practical to have certain adverse effect to the strength development of concrete.
And use the concrete arch-type bridge arch ring of stiff skeleton method construction that ring section is divided repeatedly to pour to be formed, arch ring concrete
Stress is constantly superimposed, the external wrapping concrete that arch ring first pours after reaching some strength can together with stiff skeleton formation group
The stress that structure participates in later stage load is closed, therefore the internal stress of arch ring concrete is ever-increasing, rather than at the very start
In high pressure stress state.The loading characteristic of this arch ring concrete is exactly that the optimization of " concrete strength grading rating method " is thought
Road.
According to the loading characteristic, arch ring concrete need not just reach design strength in 28d, can be according to each in calculating
The specific stress state of construction stage arch ring concrete and formulate its strength assessment time and standard, such as its 90d can be required
Even reach design strength later.Doing so can make the intensity of concrete be constantly in healthier growth state, together
When since to its, early period, intensity requirement was not high, the dosage of cement and additive can be also suitably reduced in concrete, is reduced mixed
The heat of hydration and blockage effect for coagulating soil, also avoid the generation of arch ring distress in concrete.Using the present embodiment in the bridge
After method, the development trend of arch ring concrete strength is in the pink of condition, the strong concrete in the case where the later stage has been even more than traditional method
Angle value, and full-bridge concrete arch ring does not occur crack.
To sum up, large span more degrees skeleton concrete arched bridge solves tradition side after using " concrete strength grading rating method "
The problem of early strength of concrete is excessively pursued under method, is effectively improved the stress performance of arch ring concrete, improves coagulation
The gain in strength trend of soil, while the heat of hydration and blockage effect of concrete are also reduced, avoid the production of arch ring distress in concrete
It is raw, it is a kind of large span more degrees skeleton concrete arched bridge arch ring concrete quality performance optimization method for being worth promoting on a large scale.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
All any modification, equivalent and improvement etc., should all be included in the protection scope of the present invention made by within refreshing and principle.
Claims (6)
1. a kind of large span arch bridge with Stiffness frame arch ring concrete strength grading optimization method, it is characterised in that：Arch ring concrete
Multi-working-surface concreting layer by layer and segment by segment makes the stress of arch ring concrete gradually be superimposed；According to the stress state of each construction stage, formulate
The strength evaluation standard of arch ring concrete.
2. large span arch bridge with Stiffness frame arch ring concrete strength grading optimization method according to claim 1, feature
It is：Stiff skeleton provides load support to arch ring, is based on this, using the load as the strength assessment mark for formulating arch ring concrete
Accurate leveling factors.
3. large span arch bridge with Stiffness frame arch ring concrete strength grading optimization method according to claim 1, feature
It is：The external wrapping concrete of stiff skeleton provides load support to arch ring, is based on this, using the load as formulation arch ring concrete
Strength evaluation standard leveling factors.
4. large span arch bridge with Stiffness frame arch ring concrete strength grading optimization method according to claim 1, feature
It is：Compared to arch ring concrete 28d strength evaluation standards, this method reaches arch ring concrete 28d intensity after 28 days.
5. large span arch bridge with Stiffness frame arch ring concrete strength grading optimization method according to claim 4, feature
It is：By reducing the match ratio of the cement content in arch ring concrete, reach arch ring concrete 28d after 28 days to realize
The purpose of intensity.
6. large span arch bridge with Stiffness frame arch ring concrete strength grading optimization method according to claim 4, feature
It is：By reducing the match ratio of the additional agent content in arch ring concrete, reach arch ring concrete after 28 days to realize
The purpose of 28d intensity.
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| CN201810678358.8A CN108797359A (en) | 2018-06-27 | 2018-06-27 | A kind of large span arch bridge with Stiffness frame arch ring concrete strength grading optimization method |
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| CN201810678358.8A CN108797359A (en) | 2018-06-27 | 2018-06-27 | A kind of large span arch bridge with Stiffness frame arch ring concrete strength grading optimization method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113089498A (en) * | 2021-05-10 | 2021-07-09 | 中国电建集团贵阳勘测设计研究院有限公司 | Concrete ring-dividing and sectional cast-in-place method for main arch ring of large-span arch bridge |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0978531A (en) * | 1995-09-12 | 1997-03-25 | Kumagai Gumi Co Ltd | Work execution method for arch bridge |
| CN104195961A (en) * | 2014-09-02 | 2014-12-10 | 司徒毅 | Highway bridge technical condition examination and evaluation method |
| CN104790296A (en) * | 2015-03-30 | 2015-07-22 | 广西路桥工程集团有限公司 | Construction method of concrete arch bridge with stiff skeletons |
| CN105350442A (en) * | 2015-10-08 | 2016-02-24 | 中铁二院工程集团有限责任公司 | Arching method for stiff skeleton concrete arch bridge |
| CN106592962A (en) * | 2016-12-24 | 2017-04-26 | 中铁十八局集团有限公司 | Large-height-difference long-span stiff-skeleton cladding concrete formwork construction method and apparatus |
| CN106758748A (en) * | 2017-02-25 | 2017-05-31 | 中铁十八局集团第二工程有限公司 | Long-Span Concrete Filled Steel Tubular Arch Bridges structure |
-
2018
- 2018-06-27 CN CN201810678358.8A patent/CN108797359A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0978531A (en) * | 1995-09-12 | 1997-03-25 | Kumagai Gumi Co Ltd | Work execution method for arch bridge |
| CN104195961A (en) * | 2014-09-02 | 2014-12-10 | 司徒毅 | Highway bridge technical condition examination and evaluation method |
| CN104790296A (en) * | 2015-03-30 | 2015-07-22 | 广西路桥工程集团有限公司 | Construction method of concrete arch bridge with stiff skeletons |
| CN105350442A (en) * | 2015-10-08 | 2016-02-24 | 中铁二院工程集团有限责任公司 | Arching method for stiff skeleton concrete arch bridge |
| CN106592962A (en) * | 2016-12-24 | 2017-04-26 | 中铁十八局集团有限公司 | Large-height-difference long-span stiff-skeleton cladding concrete formwork construction method and apparatus |
| CN106758748A (en) * | 2017-02-25 | 2017-05-31 | 中铁十八局集团第二工程有限公司 | Long-Span Concrete Filled Steel Tubular Arch Bridges structure |
Non-Patent Citations (1)
| Title |
|---|
| 郭琦等: "大跨径劲性骨架拱桥过程控制与后评价研究", 《广西大学学报》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113089498A (en) * | 2021-05-10 | 2021-07-09 | 中国电建集团贵阳勘测设计研究院有限公司 | Concrete ring-dividing and sectional cast-in-place method for main arch ring of large-span arch bridge |
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Application publication date: 20181113 |
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