CN109653106A - City overhead road prestressed cored slab end web inclined crack Disease Processing technology - Google Patents
City overhead road prestressed cored slab end web inclined crack Disease Processing technology Download PDFInfo
- Publication number
- CN109653106A CN109653106A CN201910003205.8A CN201910003205A CN109653106A CN 109653106 A CN109653106 A CN 109653106A CN 201910003205 A CN201910003205 A CN 201910003205A CN 109653106 A CN109653106 A CN 109653106A
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- Prior art keywords
- cored slab
- baffle
- gas vent
- grouting material
- processing technology
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- 201000010099 disease Diseases 0.000 title claims abstract description 15
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 title claims abstract description 15
- 238000012545 processing Methods 0.000 title claims abstract description 15
- 238000005516 engineering process Methods 0.000 title claims abstract description 12
- 239000000463 material Substances 0.000 claims abstract description 29
- 239000003292 glue Substances 0.000 claims description 10
- 229910000831 Steel Inorganic materials 0.000 claims description 8
- 230000003014 reinforcing effect Effects 0.000 claims description 8
- 239000010959 steel Substances 0.000 claims description 8
- 239000002002 slurry Substances 0.000 claims description 5
- 230000000903 blocking effect Effects 0.000 claims description 4
- 238000005553 drilling Methods 0.000 claims description 4
- 230000010412 perfusion Effects 0.000 claims description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 4
- 239000004593 Epoxy Substances 0.000 claims description 3
- 239000003822 epoxy resin Substances 0.000 claims description 3
- 239000004570 mortar (masonry) Substances 0.000 claims description 3
- 229920000647 polyepoxide Polymers 0.000 claims description 3
- 238000009416 shuttering Methods 0.000 claims description 3
- 238000010276 construction Methods 0.000 abstract description 6
- 238000010008 shearing Methods 0.000 abstract description 3
- 238000004140 cleaning Methods 0.000 description 3
- 239000000428 dust Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 239000008267 milk Substances 0.000 description 3
- 210000004080 milk Anatomy 0.000 description 3
- 235000013336 milk Nutrition 0.000 description 3
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 2
- 230000004888 barrier function Effects 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000012856 packing Methods 0.000 description 2
- 235000017166 Bambusa arundinacea Nutrition 0.000 description 1
- 235000017491 Bambusa tulda Nutrition 0.000 description 1
- 241001330002 Bambuseae Species 0.000 description 1
- 235000015334 Phyllostachys viridis Nutrition 0.000 description 1
- 210000001015 abdomen Anatomy 0.000 description 1
- 230000001154 acute effect Effects 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 239000011425 bamboo Substances 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 238000007596 consolidation process Methods 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 230000000192 social effect Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 238000000844 transformation Methods 0.000 description 1
Classifications
-
- 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/60—Planning or developing urban green infrastructure
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Bridges Or Land Bridges (AREA)
Abstract
The invention belongs to technical field of bridge construction, and in particular to arrive a kind of city overhead road prestressed cored slab end web inclined crack Disease Processing technology.The present invention is by being perfused grouting material in cored slab end, increase effectively prestressed cored slab end cross-sectional product, the shearing resistance section of concrete can directly be increased, improve bearing capacity, can the processing of safe, efficient progress cored slab end inclined crack, step is simple, strong operability, it saves the area, economic benefit and social benefit are significant.
Description
Technical field
The invention belongs to technical field of bridge construction, and in particular to arrive a kind of city overhead road prestressed cored slab end abdomen
Plate inclined crack Disease Processing technology.
Background technique
Prestressed cored slab is easy for installation and largely use in engineering because from heavy and light, manufacture craft is mature, low cost,
Cored slab crack disease is generally existing simultaneously, and relatively common has beam bottom transverse crack, beam bottom longitudinal crack, web vertical to split
Seam, web inclined crack etc., wherein cored slab end web inclined crack is a kind of disease of relational structure safety, and beam-ends is oblique
Crack is due to caused by hollow slab girder beam-ends shear resistance deficiency.
Comprehensive analysis city overhead road prestressed cored slab end web inclined crack disease Producing reason mainly have with
Lower three aspect: (one), which overloads, to be influenced: urban viaduct of the runing time at 20 years or more, with the increasing that urban traffic is measured, is surpassed
The passage violating the regulations of carrier vehicle, is particularly acute the destruction of viaduct；(2) structural factor: pre-tensioning system cored slab structure is last century
The nineties be exactly one of a kind of widely applied structure type in China, this class formation the characteristics of presstressed reinforcing steel in end without curved
It rises, shearing resistance mainly has the stirrup of end and concrete web to undertake, and this structural form is on the weak side on shear resistance, especially outer
The effect of side plate, anticollision barrier all concentrates on outer side plate, causes secondary dead load larger, be easy to cause structure crack；(3)
Construction quality: according to testing result, concrete strength meets former design requirement, but engineering practice shows that construction method causes
Structure size variability is larger；In addition there are exhaustion phases in end for prestressing force, can be mixed to end when presstressed reinforcing steel is truncated in end
The solidifying raw biggish impact force of local products, adversely affects end concrete quality.
Web inclined crack handle measure in cored slab end is general at present are as follows: fracture width, which is no more than, standardizes defined limit value
When, carry out dead-end fracture；If fracture width is more than to standardize defined limit value to reinforce web plate, to improve it
Shear resistant capacity, generallys use affixing steel plate or beam-ends Enlargement of Section is reinforced.When handling cored slab inclined crack, especially
It is the old overpass that city is being runed, not only the shear resistant capacity of Viaduct Structure is increased to not due to vapour -20
Grade, hang -100 grades former design load ensure structure safety, while be contemplated that be city overhead road traffic dispersion it is special
Property, social effect is taken into account, the influence to ambient enviroment is shortened the construction period and reduce as far as possible.
Summary of the invention
The present invention to solve the deficiencies in the prior art, it is oblique to provide a kind of city overhead road prestressed cored slab end web
Crack disease processing technique.
The present invention is achieved by the following technical solutions:
A kind of city overhead road prestressed cored slab end web inclined crack Disease Processing technology, includes the following steps:
(1) fill orifice, gas vent and baffle holes successively positioning drilling: are positioned along cored slab length direction in the end of cored slab；
The length of baffle holes is equal with the diameter of lower step baffle to be mounted, and width is equal with the thickness of baffle；Baffle holes and cored slab
The distance of end is 1-2.5m；
(2) it cleans cored slab: cored slab inside being cleaned using high pressure water；
(3) baffle is installed: first filling in the first block baffle in cored slab from baffle holes, the first block baffle is rotated 90 after filling in
Degree makes its vertical blocking hollow hole, then fills in another block baffle from baffle holes, and being rotated by 90 ° after filling in keeps its vertical blocking empty
Foamed glue is squeezed between two block baffles after fixing two block baffles in heart hole；Above-mentioned baffle is the hollow bore dia with cored slab
Equal circular shuttering；
(4) grouting material is perfused: fill orifice and gas vent are separately connected grouting conduit and exhaust manifolds, then since grouting conduit
Grouting material is perfused；The slurry of gas vent outflow is observed as thick stopping perfusion, continuous note is carried out again before grouting material initial set and fills
Slurry；
(5) fill orifice, gas vent and baffle holes reparation: after the completion of perfusion, fill orifice, gas vent and baffle holes are repaired respectively
It is multiple.
As a preferred solution:
In the step (1), the position of opening of fill orifice, gas vent and baffle holes avoids reinforcing bar, steel strand wires.
In the step (3), baffle is fixed using concreting or reinforcing bar.
In the step (4), grouting material is irrigated using screw pump.
In the step (5), fill orifice uses epoxy resin mortar reparation, and gas vent carries out dense packing effect, gear using grouting material
Plate hole adds epoxy concrete to be repaired using setting steel mesh.
The invention has the benefit that the present invention is only in the milk to the length of prestressed cored slab end 1-2.5m, it can
Effectively increase prestressed cored slab end cross-sectional product, can directly increase the shearing resistance section of concrete, improves bearing capacity, Neng Gouan
Entirely, the processing of cored slab end inclined crack is efficiently carried out；Cored slab is blocked using baffle and foamed glue, it is at low cost, from heavy and light,
It blocks closely knit；Step of the present invention is simple, and strong operability is saved the area, and economic benefit and social benefit are significant.
Detailed description of the invention
Fig. 1 is the structural diagram of the present invention.
In figure, 1 fill orifice, 2 gas vents, 3 baffle holes, 4 foamed glues, 5 baffles.
Specific embodiment
Specific embodiments of the present invention are given below, it should be noted that the invention is not limited to implement in detail below
Example, all equivalent transformations made on the basis of the technical solutions of the present application each fall within protection scope of the present invention.
The present invention is directed to the old overpass runed of city, is the simply supported slab based on prestressed cored slab for structure
Bridge is incorporated in Jinan City's overhead way along the river maintenance and reinforcement example, with following example to the technology of the present invention describe in detail as
Under:
A kind of city overhead road prestressed cored slab end web inclined crack Disease Processing technology, includes the following steps:
(1) positioning drilling
Fill orifice 1, gas vent 2 and baffle holes 3 are successively positioned along cored slab length direction in the end of cored slab, such as 1 institute of attached drawing
Show, wherein fill orifice 1 is used for the grouting in cored slab hollow hole, and whether gas vent 2 is closely knit for detection grouting and excludes cavity
Interior gas, baffle holes 3 for baffle 5 is installed so as to realize part be in the milk, baffle holes 3 be rectangle, the length of baffle holes 3 with
The diameter of lower step baffle 5 to be mounted is equal, and width is equal with the thickness of baffle 5.
The position using instrument positioning girder steel strand wires, reinforcing bar is needed before drilling, position of opening avoids reinforcing bar, steel twists
Line, so that the disturbance to concrete structure is preferably minimized；Grouting material mobility after guaranteeing, exhaust are also needed during positioning
Hole 2 need to be located in highest point within the scope of grouting material, and it is close just to can guarantee that grouting material has reached when gas vent 2 has grouting material outflow
It is real；Baffle holes 3 are preferred at a distance from cored slab end in 1-2.5m, because close to bending resistance of the cored slab end aperture to cored slab
Bearing capacity influence is smaller, and cored slab end center position is in prestressing force non-active area.
(2) cored slab is cleaned
In order to guarantee that grouting material and the original structure concrete of subsequent handling work together, need to guarantee between grouting material and cored slab
Free from dust influences.It is injected and is cleaned from baffle holes 3 using high pressure water when cleaning cored slab, ensure that free from dust can when outflow is clear water
Stop cleaning, carries out the construction of subsequent processing after the completion of cleaning as early as possible, new dust is prevented to be again introduced into.
(3) baffle 5 is installed
Baffle 5 is the circular shuttering equal with the hollow bore dia of cored slab, at low cost such as bamboo slab rubber using plank sheathing
And from heavy and light.Two block baffles 5 are successively installed, first fill in the first block baffle 5 in cored slab from baffle holes 3, it will gear after filling in
Plate 5 is rotated by 90 °, and makes it perpendicular to the direction of hollow hole, and baffle 5 just blocks hollow hole, is then filled in separately from baffle holes 3
One block baffle 5 is rotated by 90 ° vertical blank heart hole and is blocked after filling in, then that two block baffles 5 are fixed, and fixation is poured with concrete
It builds or other objects such as reinforcing bar is fixed.Then foamed glue 4 is squeezed between two block baffles 5, foamed glue 4 is filled from baffle holes 3
Enter, foamed glue 4 foams in the hollow hole between two block baffles 5 and blocks the gap between baffle 5.Guarantee foamed glue in this way
4 have certain length, can play and block gap and provide certain barrier force to baffle 5.Using fluid foamed glue 4, air is met
After expand, be easy to operate in small space, operability is stronger.And cost is relatively low for baffle 5 and foamed glue 4, and be self-possessed compared with
It is small, it can not remove, it is disposable to amortize, save cost of labor.
(4) grouting material is perfused
Fill orifice 1 and gas vent 2 are separately connected grouting conduit and exhaust manifolds, and grouting material is then perfused since grouting conduit,
Grouting material needs to pay attention to observation row when grouting material is perfused using the common grouting material or special-type grouting material of existing reinforcing
The slurry that stomata 2 flows out must ensure that the slurry flowed out can just stop being perfused to be thick.It is carried out again before grouting material initial set
Continuous note grouting material, to ensure that the inside grouting material reaches closely knit.
Screw pump can be used to be in the milk when grouting, it is possible to use existing any grouting equipment, by the outlet of screw pump
Grouting conduit is accessed, grouting material is moved into screw pump and then starts consolidation by grouting.
(5) fill orifice 1, gas vent 2 and baffle holes 3 are repaired
After the completion of perfusion, fill orifice 1, gas vent 2 and baffle holes 3 are repaired respectively.Fill orifice 1 can be used epoxy resin mortar and repair
Multiple, gas vent 2 can be used grouting material and carry out dense packing effect, and baffle holes 3 can be used setting steel mesh and epoxy concrete is added to be repaired
It is multiple.Reparation is not limited to the above method, as long as existing reparation means can reach the purpose of the present invention in protection model of the invention
In enclosing.
Embodiment described above, only one kind of the present invention more preferably specific embodiment, those skilled in the art
The usual variations and alternatives that member carries out within the scope of technical solution of the present invention should be all included within the scope of the present invention.
Claims (5)
1. a kind of city overhead road prestressed cored slab end web inclined crack Disease Processing technology, it is characterised in that: including
Following steps:
(1) fill orifice (1), gas vent (2) and gear successively positioning drilling: are positioned along cored slab length direction in the end of cored slab
Plate hole (3)；The length of baffle holes (3) is equal with the diameter of lower step baffle to be mounted (5), the thickness phase of width and baffle (5)
Deng；Baffle holes (3) are 1-2.5m at a distance from cored slab end；
(2) it cleans cored slab: cored slab inside being cleaned using high pressure water；
(3) baffle (5) are installed: first fill in the first block baffle (5) in cored slab from baffle holes (3), by first piece after filling in
Baffle (5), which is rotated by 90 °, makes its vertical blocking hollow hole, then fills in another block baffle (5) from baffle holes (3), rotates after filling in
90 degree make its vertical blocking hollow hole, and foamed glue (4) are squeezed between two block baffles (5) after two block baffles (5) are fixed；It is above-mentioned
Baffle (5) is the circular shuttering equal with the hollow bore dia of cored slab；
(4) grouting material is perfused: fill orifice (1) and gas vent (2) are separately connected grouting conduit and exhaust manifolds, then lead from grouting
Pipe starts that grouting material is perfused；The slurry for observing gas vent (2) outflow is that thick stoppings is perfused, grouting material it is pre-hardening preceding again into
The continuous note grouting material of row；
(5) fill orifice (1), gas vent (2) and baffle holes (3) are repaired: after the completion of perfusion, respectively to fill orifice (1), gas vent
(2) it is repaired with baffle holes (3).
2. city overhead road prestressed cored slab according to claim 1 end web inclined crack Disease Processing technology,
It is characterized by: the position of opening of fill orifice (1), gas vent (2) and baffle holes (3) avoids reinforcing bar, steel in the step (1)
Twisted wire.
3. city overhead road prestressed cored slab according to claim 1 end web inclined crack Disease Processing technology,
It is characterized by: baffle (5) is fixed using concreting or reinforcing bar in the step (3).
4. city overhead road prestressed cored slab according to claim 1 end web inclined crack Disease Processing technology,
It is characterized by: being irrigated grouting material using screw pump in the step (4).
5. city overhead road prestressed cored slab according to claim 1 end web inclined crack Disease Processing technology,
It is characterized by: fill orifice (1) uses epoxy resin mortar reparation in the step (5), gas vent (2) is carried out close using grouting material
Real filling, baffle holes (3) add epoxy concrete to be repaired using setting steel mesh.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910003205.8A CN109653106B (en) | 2019-01-03 | 2019-01-03 | Oblique crack disease treatment technology for end web plate of prestressed hollow slab of urban overhead road |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910003205.8A CN109653106B (en) | 2019-01-03 | 2019-01-03 | Oblique crack disease treatment technology for end web plate of prestressed hollow slab of urban overhead road |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109653106A true CN109653106A (en) | 2019-04-19 |
| CN109653106B CN109653106B (en) | 2023-10-27 |
Family
ID=66118720
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910003205.8A Active CN109653106B (en) | 2019-01-03 | 2019-01-03 | Oblique crack disease treatment technology for end web plate of prestressed hollow slab of urban overhead road |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109653106B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110093868A (en) * | 2019-06-03 | 2019-08-06 | 南京博瑞吉工程技术有限公司 | A kind of hollow slab girder reinforcement means and hollow slab girder |
| CN111364375A (en) * | 2020-03-16 | 2020-07-03 | 南京林业大学 | Bending-shearing mixed reinforcing method for hollow slab bridge |
| CN111608093A (en) * | 2020-05-21 | 2020-09-01 | 南京梦联桥传感科技有限公司 | Shear-resistant reinforcing method for hollow plate beam based on high-performance composite material |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110093868A (en) * | 2019-06-03 | 2019-08-06 | 南京博瑞吉工程技术有限公司 | A kind of hollow slab girder reinforcement means and hollow slab girder |
| CN110093868B (en) * | 2019-06-03 | 2024-06-25 | 南京博瑞吉工程技术有限公司 | Hollow slab beam reinforcing method and hollow slab beam |
| CN111364375A (en) * | 2020-03-16 | 2020-07-03 | 南京林业大学 | Bending-shearing mixed reinforcing method for hollow slab bridge |
| CN111608093A (en) * | 2020-05-21 | 2020-09-01 | 南京梦联桥传感科技有限公司 | Shear-resistant reinforcing method for hollow plate beam based on high-performance composite material |
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