CN105178202A - Method for reinforcing concrete pier through combination of corrugated steel pipes and fiber reinforced powder concrete - Google Patents
Method for reinforcing concrete pier through combination of corrugated steel pipes and fiber reinforced powder concrete Download PDFInfo
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- CN105178202A CN105178202A CN201510438862.7A CN201510438862A CN105178202A CN 105178202 A CN105178202 A CN 105178202A CN 201510438862 A CN201510438862 A CN 201510438862A CN 105178202 A CN105178202 A CN 105178202A
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Abstract
A method for reinforcing a concrete pier through combination of corrugated steel pipes and fiber reinforced powder concrete comprises the following steps of (1) carrying out grinding and rough chiseling on the surface of a concrete pier reinforcing area; (2) determining the steel bar embedding positions on the surface of the concrete pier reinforcing area, and embedding transverse structure bars through drilling, hole clearing and gluing; (3) arranging the corrugated steel pipes embedded in a bearing platform on the outer side of the concrete pier reinforcing area; and (4) pouring the fiber reinforced powder concrete wrapping the transverse structure bars between the corrugated steel pipes and the concrete pier. By means of the method, not only can the bearing capacity and the shock resistance of the original concrete pier be improved, but also the method has the advantages that the number of construction procedures is small, the construction speed is high, and combination between new and old concrete materials is good.
Description
Technical field
The invention belongs to engineering reinforcement technical field.Relate to a kind of reinforcement means of concrete pier.
Background technology
Bridge pier, as important component part in bridge construction, not only bears the load that superstructure transmits, and by basis, load and own wt is delivered to ground, and its safety of structure is most important.But existing a large amount of built bridge because Earlier designs specification is unreasonable, structure using function changes, damage in constructional deficiency and Long-Time Service process, agingly cause that bridge pier antidetonation is bad, many problems affecting its safety and using function such as Lack of support are very general.Therefore repair and retrofit is carried out always for people extraordinarily pay close attention to concrete pier.
The reinforcement means that current reinforced concrete bridge pier is conventional mainly contains Enlargement of Section, reinforced with external steel encased and FRP reinforcing method etc.Wherein Enlargement of Section is comparatively large owing to reinforcing rear dead load increase, easily cause carrying out additional reinforcing to original structure basis, and the increase in cross section reduces the ductility of original structure to a certain extent; Reinforced with external steel encased increases little to original structure size, but after reinforcing, concrete lateral restraint is lower, and outsourcing shaped steel corrosion resistance is poor; FRP reinforcing method has good consolidation effect to small size component, but to large-sized bridge pier component especially rectangular pier, the lateral restriction skewness of FRP, weakens consolidation effect to a certain extent.
Summary of the invention
The object of the invention is to overcome the deficiencies in the prior art, a kind of method of corrugated steel tube fiber reinforcement powder concrete composite consolidation concrete pier is provided.The method not only can repair impaired concrete pier fast, and can ensure the good combination of New-old concrete material, can also improve supporting capacity and the anti-seismic performance of former concrete pier.
For achieving the above object, the present invention adopts following technical scheme.
A method for corrugated steel tube fiber reinforcement powder concrete composite consolidation concrete pier, comprises the following steps.
(1) carry out on surface, concrete pier stabilization zone polishing, dabbing process.
(2) determine bar planting position on surface, concrete pier stabilization zone, transversary muscle implanted by boring, clear hole, gluing;
(3) corrugated steel tube of cushion cap is embedded in concrete pier stabilization zone arranged outside.
(4) between corrugated steel tube and concrete pier, build the fiber reinforcement powder concrete be included by transversary muscle.
Fiber reinforcement powder concrete of the present invention, by cement, quartz sand, silicon ash, flyash, steel fibre, economization agent, high strength water-reducing agent and water in mass ratio for 1:1-1.3:0.15-0.35:0.1-0.3:0.12-0.3:0.005-0.02:0.03-0.05: 0.2 adopts the even mix of forced stirrer to form.
Transversary muscle of the present invention is perpendicular to concrete pier stabilization zone, and entering hole depth is 10-20cm, and protruded length is 10-15cm, and vertical spacing is 20-30cm, horizontally set 6-8 root.
It is 3-5cm that corrugated steel tube of the present invention embeds the cushion cap degree of depth, and between corrugated steel tube and former concrete pier, preset clearance is 10-15cm.
Water after of the present invention between fiber reinforcement powder concrete and former concrete pier and combined closely by transversary muscle and external corrugated steel tube Confinement effect.
Tool of the present invention has the following advantages.
As fiber reinforcement powder concrete formwork for placing in the construction of waveform steel pipe, use middle as permanent structure, save template, reduce cost.
Relative to traditional reinforcement means, the method only needs to implant transversary muscle, and decreases form removable operation, can accelerate the reinforcing speed of damaged concrete bridge pier, the reduction of erection time.
Fiber reinforcement powder concrete is as the filler between corrugated steel tube and former concrete pier, decrease the thickness of outsourcing back-up coat, alleviate deadweight, the compressive strength of fiber reinforcement powder concrete superelevation and good toughness properties improve supporting capacity and the anti-seismic performance of former concrete pier.
The Confinement effect of external waveform steel pipe not only ensures the good combination of fiber reinforcement powder concrete and former concrete pier, and further increases supporting capacity and the anti-seismic performance of former concrete pier.
In sum, the present invention can not only improve supporting capacity and the anti-seismic performance of former concrete pier, and it is few to have working procedure, and speed of application is fast, and New-old concrete material is in conjunction with the advantage such as good.
Accompanying drawing explanation
Fig. 1 is schematic cross-sectional view of the present invention.
Fig. 2 is elevational schematic view of the present invention.
In figure: 1 is concrete pier, 2 is cushion cap, and 3 is transversary muscle, and 4 is fiber reinforcement powder concrete, and 5 is corrugated steel tube, and 6 is connector.
Detailed description of the invention
Below in conjunction with drawings and Examples, the invention will be further described.
For common impaired circular reinforced concrete bridge pier, concrete implementing measure is as follows.
Bridge pier stabilization zone is cleared up.First the loose concrete in surface, stabilization zone is peeled off, alignment is carried out to the reinforcing bar heaved; Then adopt sander to remove the laitance on cushion cap and former concrete pier surface, grinding depth is as the criterion to expose original structure stone; The position of electric hammer air exercise milled is finally adopted to carry out dabbing process, to strengthen the combination of New-old concrete material.
The bar planting of bridge pier stabilization zone.After having cleared up surface, former concrete pier stabilization zone, make the bar planting position of transversary muscle, wherein vertical spacing is 20-30cm, and horizontal radical is 6-8 root; Then adopt Churn drill to hole, drilling depth is 10-20cm, and hole inner concrete powder is cleaned out by rear employing high-pressure pump of having holed, and implants epoxy resin anchoring adhesive; Finally inserted by transversary muscle in the hole filling anchoring adhesive and form entirety with original structure, wherein transversary muscle protruded length is 10-15cm.
Overcoat corrugated steel tube.The annulus that corrugated steel tube presses opening in factory makes shaping, and wherein the pitch of waves is 12.5-20cm, and wave height is 2.5-6cm, and wall thickness is 2-6mm.First adopt Churn drill on cushion cap, to excavate dark 3-5cm, the cannelure of wide 2-6cm before corrugated steel tube is in place, slotting position is corrugated steel tube and cushion cap junction; Then adopt high-pressure pump to be removed by groove inner concrete powder, and inject epoxide-resin glue; Last outside concrete pier, arrange corrugated steel tube and embed in groove that cushion cap held successfully, corrugated steel tube forms closed configuration by connector.
Build fiber reinforcement powder concrete.Fiber reinforcement powder concrete, as a kind of ultra-high performance concrete, is formed for 1:1-1.3:0.15-0.35:0.1-0.3:0.12-0.3:0.005-0.02:0.03-0.05: 0.2 mix in mass ratio by cement, quartz sand, silicon ash, flyash, steel fibre, economization agent, high strength water-reducing agent and water.During making, first pour quartz sand, cement, silicon ash, flyash into forced mixer, dry mixing 5-8 minute; Then pour into disposable for the whole water supply volumes being dissolved with water reducing agent and economization agent, be stirred to after there is mobility feature and continue 5-10 minute again; It is even that last mixing of steel fiber continues to be stirred to steel fibre.After stirring completes, in corrugated steel tube, build the fiber reinforcement powder concrete be included by transversary muscle, built maintenance 3-7 days at normal temperatures, and must remain that in maintenance processes concrete surface is moistening.
Embodiment.
Experimental Study on Seismic Behavior under the low Zhou Shuiping course under cyclic loading of bridge pier.
Table 1 is that former bridge pier and reinforcing rear abutment contrast at low Zhou Shuiping cyclic reverse loading load action bottom offset ductility factor.As can be seen from the table, former displacement of bridge pier ductility factor is 3.89, and to reinforce rear abutment displacement ductility be 5.67, improves 46% relative to before reinforcing.After corrugated steel tube fiber reinforcement powder concrete composite consolidation concrete pier is described, tensility shock-resistant performance obtains obvious improvement.
The former bridge pier of table 1 and reinforcing rear abutment contrast at low Zhou Shuiping cyclic reverse loading load action bottom offset ductility factor
| Project | Δy(mm) | Δu(mm) | μ=Δy/Δu |
| Former bridge pier | 8.1 | 31.5 | 3.89 |
| Reinforce rear abutment | 10.7 | 60.7 | 5.67 |
Note: Δ y is yield displacement, Δ u is extreme displacement, and μ is displacement ductility.
The little bias voltage bearingtest of bridge pier.
Table 2 is former bridge pier and reinforces rear abutment little bias voltage bearingtest Comparative result.As can be seen from the table, former bridge pier cracking load is 1050KN, and to reinforce rear abutment cracking load be 1544KN, improves 47% relative to cracking load before reinforcing; Former bridge pier ultimate load is 1938KN, and to reinforce rear abutment ultimate load be 3004KN, improves 55% relative to ultimate load before reinforcing.After corrugated steel tube fiber reinforcement powder concrete composite consolidation concrete pier is described, supporting capacity is significantly improved.
The former bridge pier of table 2 and reinforcing rear abutment little bias voltage bearingtest Comparative result
| Project | Cracking load (KN) | Ultimate load (KN) |
| Former bridge pier | 1050 | 1938 |
| New bridge pier | 1544 | 3004 |
Claims (4)
1. a method for corrugated steel tube fiber reinforcement powder concrete composite consolidation concrete pier, is characterized in that comprising the following steps:
(1) carry out on surface, concrete pier stabilization zone polishing, dabbing process;
(2) determine bar planting position on surface, concrete pier stabilization zone, transversary muscle implanted by boring, clear hole, gluing;
(3) corrugated steel tube of cushion cap is embedded in concrete pier stabilization zone arranged outside;
(4) between corrugated steel tube and concrete pier, build the fiber reinforcement powder concrete be included by transversary muscle.
2. the method for corrugated steel tube fiber reinforcement powder concrete composite consolidation concrete pier according to claim 1, it is characterized in that described fiber reinforcement powder concrete, by cement, quartz sand, silicon ash, flyash, steel fibre, economization agent, high strength water-reducing agent and water in mass ratio for 1:1-1.3:0.15-0.35:0.1-0.3:0.12-0.3:0.005-0.02:0.03-0.05: 0.2 adopts the even mix of forced stirrer to form.
3. the method for corrugated steel tube fiber reinforcement powder concrete composite consolidation concrete pier according to claim 1, it is characterized in that described transversary muscle is perpendicular to concrete pier stabilization zone, entering hole depth is 10-20cm, protruded length is 10-15cm, vertical spacing is 20-30cm, horizontally set 6-8 root.
4. the method for corrugated steel tube fiber reinforcement powder concrete composite consolidation concrete pier according to claim 1, it is characterized in that described corrugated steel tube embeds the cushion cap degree of depth is 3-5cm, and between corrugated steel tube and former concrete pier, preset clearance is 10-15cm.
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| CN201510438862.7A CN105178202A (en) | 2015-07-24 | 2015-07-24 | Method for reinforcing concrete pier through combination of corrugated steel pipes and fiber reinforced powder concrete |
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| CN201510438862.7A CN105178202A (en) | 2015-07-24 | 2015-07-24 | Method for reinforcing concrete pier through combination of corrugated steel pipes and fiber reinforced powder concrete |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105672320A (en) * | 2016-04-06 | 2016-06-15 | 福州大学 | Seaborne wind generation set foundation grouting sleeve connection structure provided with annular groove and connection method thereof |
| CN105926435A (en) * | 2016-06-06 | 2016-09-07 | 湖南中路华程桥梁科技股份有限公司 | Reinforced seam structure of interface of reactive powder concrete layer and conventional concrete layer and construction method of reinforced seam structure |
| CN106869039A (en) * | 2017-04-06 | 2017-06-20 | 东北林业大学 | A kind of method of utilization polyurethane concrete material and Steel Thin-Wall sleeve reinforcement circular section bridge pier |
| CN107269295A (en) * | 2017-06-29 | 2017-10-20 | 昆明理工大学 | A kind of PVA ECC set lining structures and construction method |
| CN108396663A (en) * | 2018-04-11 | 2018-08-14 | 天津大学 | Bridge pier prosthetic device based on light-duty prestressing force stainless steel sheath and restorative procedure |
| CN108429211A (en) * | 2018-05-17 | 2018-08-21 | 艾博母线有限公司 | It pours and uses bus duct and its production method |
| CN108589561A (en) * | 2018-04-19 | 2018-09-28 | 石家庄铁道大学 | Heavy haul railway bridge pier steel collar ruggedized construction |
| CN108625299A (en) * | 2018-04-19 | 2018-10-09 | 石家庄铁道大学 | The multi-level reinforcement means of sulphate corrosion heavy haul railway bridge pier |
| CN108824690A (en) * | 2018-07-19 | 2018-11-16 | 清华大学 | The connection method of prefibers plate and prefibers plate and composite material section bar |
| CN109386092A (en) * | 2018-12-05 | 2019-02-26 | 华侨大学 | A kind of constructing device and method of room temperature maintenance very-high performance steel core concrete column |
| CN109678429A (en) * | 2019-01-31 | 2019-04-26 | 青岛市地铁一号线有限公司 | A kind of preparation method of the no muscle steel fiber reinforced concrete segment in the tunnel TBM |
| CN114481869A (en) * | 2022-02-25 | 2022-05-13 | 青岛理工大学 | Method for rapidly resisting earthquake and reinforcing pier |
| CN114808763A (en) * | 2022-03-11 | 2022-07-29 | 南京林业大学 | Technology for reinforcing underwater pier column by combining ultra-high performance concrete formwork and steel-fiber composite rib |
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| CN203684530U (en) * | 2014-01-23 | 2014-07-02 | 长安大学 | Hollow square steel tube column-shaped structure provided with externally-mounted apertured rib stiffeners and wrapped with corrugated steel |
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| JP2009052283A (en) * | 2007-08-27 | 2009-03-12 | Ihi Corp | Method and apparatus for connecting between steel member and concrete member |
| CN101581152A (en) * | 2009-06-05 | 2009-11-18 | 武汉大学 | Method for reinforcing concrete column by expanding section of coated concrete-filled steel tube (CFST) |
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Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105672320A (en) * | 2016-04-06 | 2016-06-15 | 福州大学 | Seaborne wind generation set foundation grouting sleeve connection structure provided with annular groove and connection method thereof |
| CN105926435A (en) * | 2016-06-06 | 2016-09-07 | 湖南中路华程桥梁科技股份有限公司 | Reinforced seam structure of interface of reactive powder concrete layer and conventional concrete layer and construction method of reinforced seam structure |
| CN106869039A (en) * | 2017-04-06 | 2017-06-20 | 东北林业大学 | A kind of method of utilization polyurethane concrete material and Steel Thin-Wall sleeve reinforcement circular section bridge pier |
| CN107269295A (en) * | 2017-06-29 | 2017-10-20 | 昆明理工大学 | A kind of PVA ECC set lining structures and construction method |
| CN108396663A (en) * | 2018-04-11 | 2018-08-14 | 天津大学 | Bridge pier prosthetic device based on light-duty prestressing force stainless steel sheath and restorative procedure |
| CN108625299B (en) * | 2018-04-19 | 2019-08-20 | 石家庄铁道大学 | The multi-level reinforcement means of sulphate corrosion heavy haul railway bridge pier |
| CN108589561A (en) * | 2018-04-19 | 2018-09-28 | 石家庄铁道大学 | Heavy haul railway bridge pier steel collar ruggedized construction |
| CN108625299A (en) * | 2018-04-19 | 2018-10-09 | 石家庄铁道大学 | The multi-level reinforcement means of sulphate corrosion heavy haul railway bridge pier |
| CN108589561B (en) * | 2018-04-19 | 2019-07-26 | 石家庄铁道大学 | Heavy haul railway bridge pier steel collar ruggedized construction |
| CN108429211A (en) * | 2018-05-17 | 2018-08-21 | 艾博母线有限公司 | It pours and uses bus duct and its production method |
| CN108429211B (en) * | 2018-05-17 | 2024-02-09 | 艾博母线有限公司 | Bus duct for pouring and production method thereof |
| CN108824690A (en) * | 2018-07-19 | 2018-11-16 | 清华大学 | The connection method of prefibers plate and prefibers plate and composite material section bar |
| CN109386092A (en) * | 2018-12-05 | 2019-02-26 | 华侨大学 | A kind of constructing device and method of room temperature maintenance very-high performance steel core concrete column |
| CN109386092B (en) * | 2018-12-05 | 2021-02-02 | 华侨大学 | Construction device and method for normal-temperature maintenance of ultrahigh-performance concrete-filled steel tubular column |
| CN109678429A (en) * | 2019-01-31 | 2019-04-26 | 青岛市地铁一号线有限公司 | A kind of preparation method of the no muscle steel fiber reinforced concrete segment in the tunnel TBM |
| CN114481869A (en) * | 2022-02-25 | 2022-05-13 | 青岛理工大学 | Method for rapidly resisting earthquake and reinforcing pier |
| CN114808763A (en) * | 2022-03-11 | 2022-07-29 | 南京林业大学 | Technology for reinforcing underwater pier column by combining ultra-high performance concrete formwork and steel-fiber composite rib |
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