CN107100095A - A kind of T-shaped rigid frame bridge oblique pull ruggedized construction and its construction method - Google Patents
A kind of T-shaped rigid frame bridge oblique pull ruggedized construction and its construction method Download PDFInfo
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- CN107100095A CN107100095A CN201710445628.6A CN201710445628A CN107100095A CN 107100095 A CN107100095 A CN 107100095A CN 201710445628 A CN201710445628 A CN 201710445628A CN 107100095 A CN107100095 A CN 107100095A
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- 238000010276 construction Methods 0.000 title claims abstract description 36
- 238000004873 anchoring Methods 0.000 claims abstract description 30
- 239000000725 suspension Substances 0.000 claims abstract description 23
- 239000002985 plastic film Substances 0.000 claims description 11
- 229920006255 plastic film Polymers 0.000 claims description 11
- 239000004567 concrete Substances 0.000 claims description 7
- 230000002787 reinforcement Effects 0.000 claims description 7
- 230000003014 reinforcing effect Effects 0.000 claims description 6
- 230000015572 biosynthetic process Effects 0.000 claims description 3
- 239000000463 material Substances 0.000 abstract description 4
- 238000005336 cracking Methods 0.000 abstract 1
- 229910000831 Steel Inorganic materials 0.000 description 5
- 239000010959 steel Substances 0.000 description 5
- 201000010099 disease Diseases 0.000 description 3
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 3
- 238000005452 bending Methods 0.000 description 2
- 210000003205 muscle Anatomy 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 229920003023 plastic Polymers 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000011150 reinforced concrete Substances 0.000 description 1
Classifications
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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
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D11/00—Suspension or cable-stayed bridges
- E01D11/04—Cable-stayed bridges
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- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Bridges Or Land Bridges (AREA)
Abstract
The column foot crossbeam of deformed bar is set in having between a kind of T-shaped rigid frame bridge oblique pull ruggedized construction, two webs above the bridge pier of T-shaped rigid frame bridge, below the top plate of T structure girders;Having in cover top surface T structure centerlines on king-tower, king-tower has between the upper and lower every embedding cable saddle;In king-tower both sides along bridge to the anchoring beam for thering is interval to be symmetricly set between two webs;It is anchored in after inclined guy cable stretching on anchoring beam and cable saddle.Being reinforced using the present invention only needs a king-tower and supporting suspension cable at T-shaped rigid frame bridge, an independent bridge pier, and is not required to construct under bridge, and quantities is significantly saved, and difficulty of construction is small, the cycle is short;The column foot crossbeam of configuration deformed bar has good intensity and cracking resistance;The small volume of beam is anchored, lightweight, consumptive material is few, and the burden to suspension cable is small;The moment that the stretching force that suspension cable is obtained by formula carries out tensioning and can unload T structure centerline T structures girder reaches Δ M just.
Description
Technical field
The present invention relates to science of bridge building field, particularly a kind of T-shaped rigid frame bridge oblique pull ruggedized construction and its construction method.
Background technology
There are some diseases after coming into operation, often in substantial amounts of T-shaped rigid frame bridge, wherein more typical disease is T-shaped
T structure girders above the bridge pier of the T structures (in Practical Project, the structure for often constituting bridge pier and T structures girder is referred to as T structures) of rigid frame bridge
Top produce crack because of bending bearing capacity.
For this technical problem, CN102286938A patent documents disclose a kind of suitable for large-span concrete box girder bridge and company
The cable-stayed system ruggedized construction of continuous rigid frame bridge, the ruggedized construction is respectively to increase by two new pile foundations in the both sides of former bridge location pile foundation, newly
Pile foundation is identical with former stake construction, and what is be connected with former cushion cap both sides is the new cushion cap using bar planting and ring orientation prestress measure, both sides
New cushion cap on set at king-tower, continuous pier bridge tower to use prestressed reinforced concrete construction respectively, tower body sets vertical prestressing, just
Bridge tower uses normal concrete structure at structure pier, in former concrete girder bottom surface plant anchor steel bracket, and passes through high-strength bolt
Fixed steel joist, forms bracket, and suspension cable is oblique to be mounted between bracket and king-tower.
When the reinforcement means is applied to solve T-shaped rigid frame bridge above-mentioned disease, there is following technical problem:
1st, ruggedized construction needs to set up in the both sides of girder that king-tower, pile foundation, cushion cap could be erected after pile foundation, cushion cap and pier stud
And the long construction period of pier stud, difficulty are big, especially in subaqueous work and higher bridge pier, expense is higher, and difficulty is bigger.
2nd, need to be arranged in beam bottom to enable suspension cable to act on the bracket that girder sets, and its length needs to be more than bridge
The width of beam, the width of general bridge has more than 10 meters, or even more than 20 meters, causes the structure of bracket very huge, not only expends material
Material, economy is not good, and the deadweight of huge bracket brings sizable burden to suspension cable.
3rd, two king-towers and supporting suspension cable are needed at the bridge pier of an independent T-shaped rigid frame bridge, quantities is very huge,
For full-bridge, then more very.
4th, lacking a set of effective, complete construction technical schemes can be for reference.
The content of the invention
In view of the above-mentioned problems of the prior art, it is an object of the invention to provide a kind of miniaturization simple in construction, cost
The T-shaped rigid frame bridge oblique pull ruggedized construction and its construction method of low and quick construction.
To achieve these goals, the present invention is adopted the following technical scheme that:
A kind of T-shaped rigid frame bridge oblique pull ruggedized construction, including king-tower and suspension cable;Above the bridge pier positioned at T-shaped rigid frame bridge,
Have between two webs below the top plate of T structure girders and the plastic ripple that two ends pass through web is embedded with column foot crossbeam, column foot crossbeam
Deformed bar is equipped with pipe, plastic film capicitor, is anchored in after the two ends tensioning of deformed bar on web;The king-tower is set
Have between the upper and lower every four embedding cable saddles, four in cover top surface T structure centerlines at correspondence column foot crossbeam, king-tower
Cable saddle is respectively L/3,5L/12, L/2,7L/12 with the distance of bridge floor from bottom to top, and wherein L is T structure jib-lengths;In king-tower two
There are four anchoring beams being symmetricly set between two webs side respectively, and four anchor the suitable bridges in beams edge to the distance with T structure center lines
Respectively L/3, L/2,2L/3,5L/6, wherein L are T structure jib-lengths;There is rope respectively in the corresponding top plate of four anchoring beams
Hole, the suspension cable is each passed through cable saddle and rope hole corresponding with cable saddle, is anchored in after tensioning on anchoring beam.
The construction method of above-mentioned T-shaped rigid frame bridge oblique pull ruggedized construction, it is characterised in that comprise the following steps:
Step one:Web at setting column foot crossbeam is carried out to set up template after surface dabbing, bar planting, assembling reinforcement, so
Duct is opened up on web afterwards, plastic film capicitor is arranged in the bottom of column foot crossbeam through duct, is then poured using concrete
Build to form column foot crossbeam, after 5~10 days, deformed bar is worn in plastic film capicitor, will be anchored in after deformed bar tensioning
On web;
Step 2:Template, colligation steel are set up after carrying out surface dabbing, bar planting to the upper surface for setting the top plate at king-tower
Muscle, then forms king-tower using concreting;Cable saddle is buried in king-tower simultaneously;
Step 3:The web for setting anchoring Liang Chu is carried out to set up template after surface dabbing, bar planting, assembling reinforcement, then
Casting concrete formation anchoring beam;
Step 4:The rope hole for wearing suspension cable is opened up in top plate and anchoring beam, suspension cable is passed through into rope hole and and rope
The corresponding cable saddle in hole, the stretching force F then calculated as followspCarry out tensioning:
In formula:
L is T structure jib-lengths (m),
Δ M is unloading moment of flexure (kNm), and the moment of flexure unloaded to T structure centerline T structures girder is needed when specially reinforcing
Value,
It is anchored in after the completion of inclined guy cable stretching on anchoring beam, terminates construction.
Compared with above-mentioned prior art, the beneficial effects of the invention are as follows:
1st, T-shaped rigid frame bridge is reinforced using the present invention, then only needs a king-tower and supporting at an independent bridge pier
Suspension cable, and be not required to construct under bridge, quantities significantly reduces, and good economy performance, difficulty of construction is small, short construction period.
2nd, deformed bar is configured in column foot crossbeam, can effectively ensure that column foot crossbeam has good intensity and crack resistance
Can, provide reliable basis for king-tower.
3rd, the anchoring beam of suspension cable anchoring is arranged between web, and the carrier structure than prior art is simple, small volume,
Lightweight, consuming material is few, and good economy performance, the burden to suspension cable is small.
4th, cable saddle and anchoring beam are laid according to the position of setting, and every skew cables is carried out according to stretching force calculation formula
Tensioning, can make the moment that T structure centerline T structures girder is unloaded reach Δ M just;Identical tensioning is used per skew cables
Power carries out tensioning, and convenient construction, the type selecting of suspension cable is also very convenient.
5th, the present invention provides complete set, arrangement and method for construction effectively, unique for the reinforcing of T-shaped rigid frame bridge, and T structures can be achieved
The unloading of centerline T structure girder moments of flexure, reaches the purpose for reinforcing T-shaped rigid frame bridge.
Brief description of the drawings
Fig. 1 is the elevation of T-shaped rigid frame bridge oblique pull ruggedized construction embodiment of the invention, and wherein ZXX represents T structure center lines;
The sectional view that Fig. 2 is A-A in Fig. 1;
In figure:1-T-shaped rigid frame bridge, 2-column foot crossbeam, 3-web, 4-plastic film capicitor, 5-deformed bar, 6-
King-tower, 7-cable saddle, 8-anchoring beam, 9-suspension cable, 10-bridge pier, 11-T structure girders, 12-rope hole, 13-top plate.
Embodiment
Below in conjunction with drawings and examples, the present invention will be further described.
With reference to Fig. 1, the bridge of the T-shaped rigid frame bridge 1 of the present embodiment is combined as (80+150+80) m, T structure jib-length L=60m,
There is the crack caused by bending bearing capacity is not enough in the top of its T structures girder 11 at bridge pier 10, and crack Breadth Maximum is
0.33mm。
With reference to Fig. 1 and Fig. 2, the oblique pull ruggedized construction of the T-shaped rigid frame bridge is:On the bridge pier 10 positioned at T-shaped rigid frame bridge 1
There is suitable bridge to long 6m, the wide 10m of direction across bridge (width and two webs 3 between side, two webs 3 of the lower section of top plate 13 of T structures girder 11
Spacing it is identical), high 3m column foot crossbeam 2,5 road Φ 90mm plastic film capicitors 4, per pass plastics ripple are buried in the bottom of column foot crossbeam 2
It is equipped with line pipe 4 by 17 ΦsThe deformed bar 5 that 15.20-1x7 steel strand wires are constituted, the two ends tensioning of deformed bar 5
After be anchored on web 3;There is the vertical king-tower for standing on T structure centerlines the upper surface of top plate 13 at correspondence column foot crossbeam 2
6, king-tower is along bridge to long 3m, and direction across bridge wide 2m, high 40m are buried respectively in king-tower at bridge floor 20m, 25m, 30m, 35m position
Put cable saddle 7;In king-tower both sides, along two group, every group 4 of anchoring beam 8 of the bridge between there is interval to be symmetricly set in two webs, often
4 anchoring beams of group are respectively 20m, 30m, 40m, 50m apart from the distance of T structure center lines, and anchoring beam is along bridge to long 4m, direction across bridge
Wide 10m (width is identical with the spacing of two webs 3), high 1m;There is diameter of phi 273mm rope in anchoring beam and (corresponding) top plate
The 250A-19 types suspension cable 9 that anchoring beam and king-tower are anchored in after tensioning is equipped between hole 12, cable saddle and the rope hole.
The construction method of above-mentioned T-shaped rigid frame bridge oblique pull ruggedized construction, comprises the following steps:
Step one:To setting the web at column foot crossbeam to set up template, colligation column foot crossbeam after carrying out surface dabbing, bar planting
Reinforcing bar, then opens up 5 mutual ducts away from 50cm, diameter 94mm, plastic film capicitor 4 is passed through respectively on two coxostermums
Duct is arranged in the bottom of column foot crossbeam, then column foot crossbeam is formed using C50 concretings, after 7 days, in plastic film capicitor
Deformed bar is inside worn, will be anchored in after deformed bar tensioning on web.
Step 2:Template, colligation steel are set up after carrying out surface dabbing, bar planting to the upper surface for setting the top plate at king-tower
Muscle, then forms king-tower using C50 concretings;While by setting position and being sized burying 4 cable saddles in king-tower.
Step 3:The web for setting anchoring Liang Chu is carried out to set up template after surface dabbing, bar planting, assembling reinforcement, then
Pour C50 concrete formation anchoring beam.
Step 4:By being sized opening up the rope hole for wearing suspension cable in top plate and anchoring beam, suspension cable is passed through
Suo Konghe cable saddles corresponding with rope hole, the stretching force F then drawn by calculation formulapCarry out tensioning:
Need to be 120700kNm to the moment that T structure centerline T structures girder is unloaded during reinforcing, that is, unload moment of flexure Δ M
=120700kNm, is substituted into calculation formula and draws stretching force FpFor:
It is anchored in after the completion of inclined guy cable stretching on anchoring beam, construction terminates.
Claims (2)
1. a kind of T-shaped rigid frame bridge oblique pull ruggedized construction, including king-tower (6) and suspension cable (9);It is characterized in that:Positioned at T-shaped firm
There is column foot crossbeam (2) between two webs (3) above the bridge pier (10) of structure bridge (1), below the top plate (13) of T structures girder (11),
It is embedded with column foot crossbeam in the plastic film capicitor (4) that two ends pass through web, plastic film capicitor and is equipped with deformed bar (5), in advance
It is anchored in after the two ends tensioning of stress reinforcing bar on web;The king-tower (6) is located at the cover top surface T structures at correspondence column foot crossbeam
Have in centerline, king-tower between the upper and lower every four embedding cable saddles (7), four cable saddles are distinguished with the distance of bridge floor from bottom to top
For L/3,5L/12, L/2,7L/12, wherein L is T structure jib-lengths;It is symmetricly set in respectively in king-tower both sides between two webs
Four anchoring beams (8), four anchoring beams along along bridges to the distance with T structure center lines be respectively L/3, L/2,2L/3,5L/6, its
Middle L is T structure jib-lengths;There is rope hole (12) respectively in the corresponding top plate of four anchoring beams, the suspension cable (9) is worn respectively
Cable saddle and rope hole corresponding with cable saddle are crossed, is anchored in after tensioning on anchoring beam.
2. the construction method of T-shaped rigid frame bridge oblique pull ruggedized construction described in claim 1, it is characterised in that comprise the following steps:
Step one:To setting the web at column foot crossbeam to set up template, assembling reinforcement, Ran Hou after carrying out surface dabbing, bar planting
Duct is opened up on web, plastic film capicitor is arranged in the bottom of column foot crossbeam through duct, then using concreting shape
Into column foot crossbeam, after 5~10 days, deformed bar is worn in plastic film capicitor, web will be anchored in after deformed bar tensioning
On;
Step 2:The upper surface for setting the top plate at king-tower is carried out to set up template after surface dabbing, bar planting, assembling reinforcement, so
King-tower is formed using concreting afterwards;Cable saddle is buried in king-tower simultaneously;
Step 3:Template is set up after carrying out surface dabbing, bar planting to the web for setting anchoring Liang Chu, then assembling reinforcement pours
Concrete formation anchoring beam;
Step 4:Open up rope hole for wearing suspension cable in top plate and anchoring beam, by suspension cable through rope hole and with rope hole pair
The cable saddle answered, the stretching force F then calculated as followspCarry out tensioning:
<mrow>
<msub>
<mi>F</mi>
<mi>p</mi>
</msub>
<mo>=</mo>
<mfrac>
<mrow>
<mn>0.6975</mn>
<mi>&Delta;</mi>
<mi>M</mi>
</mrow>
<mi>L</mi>
</mfrac>
</mrow>
In formula:
L is T structure jib-lengths,
Δ M is unloading moment of flexure,
It is anchored in after the completion of inclined guy cable stretching on anchoring beam, terminates construction.
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Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN109024319A (en) * | 2018-09-21 | 2018-12-18 | 湖北省交通规划设计院股份有限公司 | A kind of the low-pylon cable-stayed bridge ruggedized construction and construction method of double width continuous rigid frame bridge |
CN107605172B (en) * | 2017-10-16 | 2020-04-17 | 叶长青 | Construction method for reinforcing structure of concrete roof beam |
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JP2001348812A (en) * | 2000-06-07 | 2001-12-21 | Mitsubishi Heavy Ind Ltd | Cable structure and earthquake resistant reforming method therefor |
JP2011032651A (en) * | 2009-07-30 | 2011-02-17 | Yokohama National Univ | Bridge reinforcing structure and bridge reinforcing method |
CN102392422A (en) * | 2011-11-26 | 2012-03-28 | 广州大学 | Reinforcement structure of single-cable-plane cable-stayed bridge |
CN203729193U (en) * | 2014-01-26 | 2014-07-23 | 长安大学 | Low tower stay cable reinforced T-type rigid framework system with suspension beams |
CN205474788U (en) * | 2016-04-12 | 2016-08-17 | 沈阳建筑大学 | Broad width box girder bridge girder roof reinforced structure |
CN206800226U (en) * | 2017-06-14 | 2017-12-26 | 沈阳建筑大学 | A kind of T-shaped rigid frame bridge oblique pull ruggedized construction |
-
2017
- 2017-06-14 CN CN201710445628.6A patent/CN107100095A/en active Pending
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2001348812A (en) * | 2000-06-07 | 2001-12-21 | Mitsubishi Heavy Ind Ltd | Cable structure and earthquake resistant reforming method therefor |
JP2011032651A (en) * | 2009-07-30 | 2011-02-17 | Yokohama National Univ | Bridge reinforcing structure and bridge reinforcing method |
CN102392422A (en) * | 2011-11-26 | 2012-03-28 | 广州大学 | Reinforcement structure of single-cable-plane cable-stayed bridge |
CN203729193U (en) * | 2014-01-26 | 2014-07-23 | 长安大学 | Low tower stay cable reinforced T-type rigid framework system with suspension beams |
CN205474788U (en) * | 2016-04-12 | 2016-08-17 | 沈阳建筑大学 | Broad width box girder bridge girder roof reinforced structure |
CN206800226U (en) * | 2017-06-14 | 2017-12-26 | 沈阳建筑大学 | A kind of T-shaped rigid frame bridge oblique pull ruggedized construction |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN107605172B (en) * | 2017-10-16 | 2020-04-17 | 叶长青 | Construction method for reinforcing structure of concrete roof beam |
CN109024319A (en) * | 2018-09-21 | 2018-12-18 | 湖北省交通规划设计院股份有限公司 | A kind of the low-pylon cable-stayed bridge ruggedized construction and construction method of double width continuous rigid frame bridge |
CN109024319B (en) * | 2018-09-21 | 2023-12-15 | 湖北省交通规划设计院股份有限公司 | Low-tower cable-stayed bridge reinforcing structure of double-amplitude continuous rigid frame bridge and construction method |
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