CN102605721A - Method for seismic hardening pier by steel plate - Google Patents
Method for seismic hardening pier by steel plate Download PDFInfo
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- CN102605721A CN102605721A CN2012100813830A CN201210081383A CN102605721A CN 102605721 A CN102605721 A CN 102605721A CN 2012100813830 A CN2012100813830 A CN 2012100813830A CN 201210081383 A CN201210081383 A CN 201210081383A CN 102605721 A CN102605721 A CN 102605721A
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Abstract
The invention discloses a method for the seismic hardening a pier by a steel plate. The method comprise the steps of grinding a pier reinforcing area; drilling the reinforcing areas on the surfaces of the pier and a bearing platform according to the design; cleaning concrete powder in drilling holes; embedding a screw rod in the pier by bonded rebar glue; enabling a steel plate to pass through the screw rod of the pier, and screwing a screw cap on the screw rod; adhering reinforcing angle steel on the bearing platform; drilling to embed steel bars; embedding a screw rod on the bearing platform, binding stirrups and pouring concrete; and demolding and maintaining. According to the method, the anti-seismic effect of the pier is obvious, the pier destroyed by the earthquake can be restored rapidly, the large-size mechanical machine for construction is not needed, the wetting operation quantity at site is few, the construction is rapid, the influence on the traffic is little, and the size of the original structure cannot be changed obviously.
Description
Technical field
The present invention relates to a kind of method of steel plate seismic hardening bridge pier.This method improves the ability of bridge pier opposing earthquake, prevents that bridge pier from destroying in seismic process, belongs to earthquake resistant engineering reinforcing technique field.
Background technology
At present; The method that bridge pier is reinforced mainly contains the reinforcing of increasing section method, carbon fiber reinforcement, dry type steel clad reinforcement; But these reinforcement means generally are used to improve the vertical bearing capacity of bridge pier, or repair shaking the bridge pier that destroys the back, but these methods also exist some problems.
When violent earthquake took place, heavy damage possibly take place and collapse in bridge, caused whole traffic system paralysis.Under the effect of seismic forces, the junction of bridge pier and cushion cap is the place that destruction is taken place the most easily, and traditional reinforcement means is paid attention to the seismic hardening to pier shaft usually, and still perfect inadequately to the consolidation process technology of bridge pier and cushion cap junction.
Summary of the invention
The deficiency of just existing bridge pier reinforcement means; The invention provides a kind of method of steel plate seismic hardening bridge pier; This method not only can improve the shock resistance and the vertical bearing capacity of bridge pier; Can also reinforce reparation to the bridge pier after the shake, make bridge pier avoid the destruction of earthquake in the seismic process afterwards, for earthquake relief work and rebuilding in disaster-hit areas provide reliable guidance.
The technical solution adopted for the present invention to solve the technical problems is:
A kind of method of steel plate seismic hardening bridge pier, its step comprises:
A. to the processing of polishing of bridge pier reinforcing area, the flat processing mended with high-strength mortar by surface hole, depression and place, crack;
B. on the fixing steel plate with angle steel on the position, hole, respectively bridge pier and cushion cap surface reinforcing area is holed;
C. remove the concrete powder in the boring;
D. implant bridge pier heeling-in screw rod with bar planting glue;
E. steel bonding glue on the bridge pier surfaces coated, polishing steel plate later tightly sticks on steel bonding glue surface, tightens the nut on the screw rod then rapidly;
F. cushion cap is pasted the reinforcing angle that has stiffening rib, heeling-in cushion cap heeling-in screw rod;
G. the heeling-in reinforcing bar of holing, colligation stirrup concreting;
H. form removal, maintenance.
The beneficial effect of advantage of the present invention and generation is:
1, this method can be repaired bridge pier that destroys the shake back and the anti-seismic performance that improves the not enough bridge of shock resistance fast, does not need large-scale construction machinery utensil, and the situ wet workload is little, and, original structure size little to the traffic circulation influence do not take place significantly not change.
2, construction is rapid, and method of operating is simple, can significantly improve the antidetonation bearing capacity of bridge pier in a short time, makes bridge withstand the test of geological process.
3, this job practices couples together bridge pier and cushion cap through angle steel; Increase the intensity of bridge pier and cushion cap junction weak part; Make bridge pier under geological process, can resist seismic forces effectively; Make bridge pier avoid big destruction, anti seismic efficiency is remarkable, reinforces cost simultaneously and will hang down with respect to existing several kinds of reinforcement means.
4, with steel plate bridge pier is carried out seismic hardening and can reduce the earthquake of bridge in seismic process; Bridge pier no longer produces shear failure; Under the parcel of steel plate; The axial compression resistance ability of bridge pier is significantly improved, and has effectively reduced the top displacement of bridge pier, the generation of the beam earthquake phenomenon that falls when effectively having prevented earthquake simultaneously.Couple together bridge pier and cushion cap through angle steel, strengthened the two overall performance, make angle steel under geological process, can resist seismic forces effectively, reduce the destruction of bridge pier;
5, the present invention implements to make the seismic hardening effect of bridge pier remarkable, keeps the unblocked of transportation network, guarantees carrying out smoothly of earthquake relief work work, reduces the loss of the country and people's lives and properties.
Description of drawings
Fig. 1 is a front view of the present invention.
Fig. 2 is the lateral view of Fig. 1.
Fig. 3 is the vertical view of Fig. 1.
Fig. 4 is that pier shaft is reinforced forward and backward skeleton curve figure.
Fig. 5 is the hysteresis loop figure of unguyed bridge pier.
Fig. 6 is the hysteresis loop figure that reinforces rear abutment.
The specific embodiment
Below in conjunction with accompanying drawing, technical scheme of the present invention is described further again:
1. to the processing of polishing of bridge pier reinforcing area
According to the related specifications of seismic hardening, calculate and reinforce the required reinforcing height of bridge pier and the thickness of strengthening steel slab.To the reinforcing area processing of polishing, the flat processing mended with high-strength mortar with sander by surface hole, depression and place, crack, bridge pier is destroyed serious part, need the concrete of forced destruction, fill up with the high-strength compound mortar.
2. hole to bridge pier and cushion cap surface reinforcing area respectively on the fixing steel plate and the position, hole on the angle steel
By the time the high-strength mortar of mend reaches after the intensity, and electricity consumption is drilled in the bridge pier surface reinforcing area of handling well and requires to hole according to reinforcing.The layout of boring should be carried out layout according to the force mechanism of bridge pier under the seismic force effects, and the distance of holing that links to each other with angle steel 5 on the bridge pier is 10-15cm; The degree of depth of boring is 15-20cm, and the heeling-in screw rod 2 that scribbles bar planting glue so just has enough adhesion stresss between the concrete of meeting and hole inside, prevents that the heeling-in screw rod is pulled out in seismic process, resists seismic forces more effectively.Cushion cap heeling-in screw rod 7 is holed with heeling-in reinforcing bar 6 places on cushion cap according to designing requirement,, should avoid reinforcing bar as far as possible, move bore position if in boring procedure, run into reinforcing bar.The boring of cushion cap heeling-in screw rod 7 is 25cm, prevents that cushion cap heeling-in screw rod 7 is pulled out under seismic force effects.
3. remove the concrete powder in the boring
Blow out the concrete powder in the boring with air compressor machine, the air pressure of air compressor machine can not be too low, and too low deep hole inner concrete powder can not be cleaned out, and influences the bar planting effect.When air compressor machine was worked, the staff should put on mouth mask, prevented in the concrete powder suction body human body to be damaged.Blow the order in hole and should blow the boring on the bridge pier earlier, blow the boring on the cushion cap again, and cover the boring of having blown over, prevent that concrete powder falls into boring when the boring of blowing thereafter with overcover.
4. implant bridge pier heeling-in screw rod with bar planting glue
The used strengthening steel slab of processing bridge pier seismic hardening grinds off the oxide layer and the greasy dirt on strengthening steel slab 3 and reinforcing angle 5 surfaces with sander, only steel plate 3 is carried out with angle steel 5 stickup faces during polishing and polish lines should with receive force direction vertical.The stiffening rib 8 of burn-oning between two limbs of angle steel 5 can strengthen the integral rigidity of reinforcing angle like this, prevents that reinforcing angle 5 from tear failure taking place under the effect of seismic forces, improves whole anti-seismic performance.Full and uniform bar planting glue---the epoxide-resin glue of smearing on heeling-in screw rod 2 pours into bar planting glue by the seismic hardening requirement in bridge pier boring subsequently.
5. the nut on the screw rod is tightened on steel bonding glue on the bridge pier surfaces coated, polishing steel plate later stickup steel bonding glue surface tightly then rapidly
By the time bridge pier bar planting glue solidifies (being generally 24 hours) after the intensity that reaches regulation fully, smears steel bonding glue in bridge pier seismic hardening region surface and reinforcing angle 5 surfaces, and is slightly thicker in the middle of the smearing thickness of steel bonding glue; Thinner all around, strengthening steel slab 3 passes screw rod 2 then, tightly is attached to reinforce the bridge pier surface; Firmly from the centre to around press strengthening steel slab 3; There is steel bonding glue to extrude up to edge, guarantees that strengthening steel slab 3 fully pastes the nut 1 of screwing on rapidly subsequently.
6. cushion cap is pasted and is had the stiffening rib angle steel and implant the heeling-in reinforcing bar.
By the time after the steel bonding glue that is connected with bridge pier of strengthening steel slab solidifies fully and reaches prescribed strength, paste the angle steel 5 of band stiffening rib 8 on the cushion cap, electricity consumption is welded in angle steel 5 stiffening rib 8 of burn-oning, and to strengthen the integral rigidity of reinforcing angle 5, increases the ability of opposing brisance.Implant cushion cap heeling-in screw rod 7 with epoxy resin mortar and and then implant heeling-in reinforcing bar 6 with epoxy resin mortar at the edge of angle steel 5.Angle steel 5 sticks together with steel bonding glue and steel plate 3 on bridge pier, connects tightening nuts 1 with the screw rod of being with nut 12 more simultaneously.The firm connection of angle steel 5 and bridge pier and cushion cap is to reinforce successful assurance, because the junction of bridge pier and cushion cap is a plane of weakness, so the heeling-in screw rod setting depth that is connected with angle steel 5 on bridge pier and the cushion cap is 25cm.Angle steel 5 is glued together with steel bonding with cushion cap, in the boring of two limbs through bridge pier and cushion cap junction of angle steel 5, implants cushion cap heeling-in screw rod 7 in the cushion cap nut 1 that links to each other with screw rod 2 on the tight angle steel 5 of screwing on then with epoxide-resin glue then.
7. colligation stirrup concreting
By the time after cushion cap heeling-in screw rod 7 solidified and reaches prescribed strength, the nut 1 of the cushion cap heeling-in screw rod 7 of screwing on was implanted the Ribbed Bar 6 that has 90 degree crotches along the spacing of angle steel 5 outer 5cm then, on Ribbed Bar 6, binds stirrup 4.The number of stirrup 4 is decided by the height of reinforcing, and more as much as possible, can play the effect that well bonds to reinforcing area like this, strengthens the ability of opposing seismic forces, improves anti-seismic performance.Carry out preservative treatment at rebar surface at last, a good template is built external wrapping concrete 9, and the label of external wrapping concrete 9 is higher than original label.
8. form removal, maintenance
External wrapping concrete removes template after reaching certain intensity, wraps plastic sheeting, and the watering maintenance reaches the intensity of regulation up to concrete, promptly accomplishes the seismic hardening of bridge pier steel plate.
Test Example
Before the reinforcing, adopt the horizontal force seismic forces to load during the bridge pier test, when payload values is 3t, the crack at the bottom of pier, occurs, and connect whole cross section rapidly.After adopting the present invention, the crack when payload values is 3t, do not occur, when payload values is 4t, attendes corner at the concrete bearing platform of newly building and 45 ° of cracks occur, reinforce the rear abutment seismic bearing capacity and be improved significantly.
Shown in Figure 4; Dotted line is the skeleton curve of unguyed steel plate bridge pier; Solid line is the skeleton curve of strengthening steel slab rear abutment; The ultimate bearing capacity of as can be seen from the figure unguyed steel plate bridge pier is 50kN, and the ultimate bearing capacity of steel plate reinforcement rear abutment is 120kN, thereby the shock resistance that can find out the steel plate reinforcement rear abutment obtains bigger raising.From Fig. 4 steel plate reinforcement skeleton curve is influenced figure and can see obviously that the bridge pier steel plate adds supporting capacity and anti seismic efficiency that Shockproof reinforcing method can obviously improve bridge pier.
Obviously see among Fig. 5 and Fig. 6: the hysteresis loop of steel plate reinforcement rear abutment is obviously full than the hysteresis loop of unguyed bridge pier, prove absolutely that steel plate reinforcement rear abutment shock resistance is better than reinforcing before.
Claims (1)
1. the method for a steel plate seismic hardening bridge pier the steps include:
A. to the processing of polishing of bridge pier reinforcing area, the flat processing mended with high-strength mortar by surface hole, depression and place, crack;
B. hole by designing requirement to bridge pier and cushion cap reinforcing area respectively on the fixing steel plate (3) and the position, hole on the angle steel (5);
C. remove the concrete powder in the boring;
D. implant bridge pier heeling-in screw rod (2) with bar planting glue;
E. steel bonding glue on the bridge pier surfaces coated, polishing steel plate (3) is later tightly pasted steel bonding glue surface, tightens the nut (1) on the screw rod (2) then rapidly;
F. cushion cap strengthening with external bonding angle steel (5) is implanted cushion cap heeling-in screw rod (7);
G. the heeling-in reinforcing bar (6) of holing, colligation stirrup (4), concreting (9);
H. form removal, maintenance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN2012100813830A CN102605721A (en) | 2012-03-23 | 2012-03-23 | Method for seismic hardening pier by steel plate |
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| CN2012100813830A CN102605721A (en) | 2012-03-23 | 2012-03-23 | Method for seismic hardening pier by steel plate |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103306219A (en) * | 2013-06-25 | 2013-09-18 | 福州大学 | Method for quickly repairing and reinforcing post-earthquake damaged pier |
| CN103397579A (en) * | 2013-08-14 | 2013-11-20 | 西南交通大学 | Method for repairing plate type concrete retaining shoulder of ballastless track and drilling device |
| CN104805775A (en) * | 2015-05-07 | 2015-07-29 | 福州大学 | Construction method for RC (Reinforced Concrete) bridge pier post-earthquake restoration technology |
| CN106436588A (en) * | 2016-10-12 | 2017-02-22 | 广西大学 | Concrete pier/column reinforcing device based on aluminum alloy and construction method thereof |
| CN107034781A (en) * | 2017-05-18 | 2017-08-11 | 广州大学 | One kind enhancing antidetonation pier stud and its method of construction |
| 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 |
| CN110029596A (en) * | 2019-05-22 | 2019-07-19 | 福州大学 | Combined type bridge pier seismic reinforcing structure and its construction method |
| CN112458908A (en) * | 2020-11-12 | 2021-03-09 | 北京城建道桥建设集团有限公司 | Construction method for steel hoops of pier anti-seismic facility in two-step accurate-in-place mode |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103306219A (en) * | 2013-06-25 | 2013-09-18 | 福州大学 | Method for quickly repairing and reinforcing post-earthquake damaged pier |
| CN103306219B (en) * | 2013-06-25 | 2015-07-22 | 福州大学 | Method for quickly repairing and reinforcing post-earthquake damaged pier |
| CN103397579A (en) * | 2013-08-14 | 2013-11-20 | 西南交通大学 | Method for repairing plate type concrete retaining shoulder of ballastless track and drilling device |
| CN103397579B (en) * | 2013-08-14 | 2016-02-17 | 西南交通大学 | The restorative procedure of plate-type ballastless track concrete shoulder block and drilling equipment |
| CN104805775A (en) * | 2015-05-07 | 2015-07-29 | 福州大学 | Construction method for RC (Reinforced Concrete) bridge pier post-earthquake restoration technology |
| CN104805775B (en) * | 2015-05-07 | 2016-07-06 | 福州大学 | The construction method of recovery technique after the shake of a kind of RC bridge pier |
| CN106436588A (en) * | 2016-10-12 | 2017-02-22 | 广西大学 | Concrete pier/column reinforcing device based on aluminum alloy and construction method thereof |
| CN106436588B (en) * | 2016-10-12 | 2019-03-26 | 广西大学 | A kind of concrete pier based on aluminium alloy/column bracing means and its construction method |
| CN107034781A (en) * | 2017-05-18 | 2017-08-11 | 广州大学 | One kind enhancing antidetonation pier stud and its method of construction |
| 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 |
| CN110029596A (en) * | 2019-05-22 | 2019-07-19 | 福州大学 | Combined type bridge pier seismic reinforcing structure and its construction method |
| CN110029596B (en) * | 2019-05-22 | 2024-02-06 | 福州大学 | Composite pier anti-seismic reinforcing structure and construction method thereof |
| CN112458908A (en) * | 2020-11-12 | 2021-03-09 | 北京城建道桥建设集团有限公司 | Construction method for steel hoops of pier anti-seismic facility in two-step accurate-in-place mode |
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Application publication date: 20120725 |