CN109610339A - Concrete continuous rigid structure bridge assembled unbalanced-loading preventing thrustor and its construction method - Google Patents
Concrete continuous rigid structure bridge assembled unbalanced-loading preventing thrustor and its construction method Download PDFInfo
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- CN109610339A CN109610339A CN201811645154.0A CN201811645154A CN109610339A CN 109610339 A CN109610339 A CN 109610339A CN 201811645154 A CN201811645154 A CN 201811645154A CN 109610339 A CN109610339 A CN 109610339A
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- continuous rigid
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- 239000004567 concrete Substances 0.000 title claims abstract description 17
- 238000010276 construction Methods 0.000 title claims description 24
- 230000005540 biological transmission Effects 0.000 claims abstract description 20
- 238000005183 dynamical system Methods 0.000 claims abstract description 15
- 230000006835 compression Effects 0.000 claims description 31
- 238000007906 compression Methods 0.000 claims description 31
- 239000003381 stabilizer Substances 0.000 claims description 16
- 230000007935 neutral effect Effects 0.000 claims description 6
- 229910000831 Steel Inorganic materials 0.000 claims description 4
- 239000010959 steel Substances 0.000 claims description 4
- 238000006073 displacement reaction Methods 0.000 claims description 3
- 230000001360 synchronised effect Effects 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 3
- 239000011513 prestressed concrete Substances 0.000 description 3
- 230000015271 coagulation Effects 0.000 description 2
- 238000005345 coagulation Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000007596 consolidation process Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000007774 longterm Effects 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
- E01D21/00—Methods or apparatus specially adapted for erecting or assembling bridges
Abstract
The invention discloses a kind of concrete continuous rigid structure bridge assembled unbalanced-loading preventing thrustors, including built-in fitting, power transmission rod piece and dynamical system；Built-in fitting includes web built-in fitting and top plate embedded part；Dynamical system includes jack, oil pump and two pieces of bearing plates；The web built-in fitting and top plate embedded part are embedded in continuous rigid frame bridge in across two sides beam bodies；Two pieces of bearing plates are oppositely arranged, and are connect respectively by two sets of power transmission rod pieces with the built-in fitting in beam bodies across two sides in continuous rigid frame bridge, and jack is installed between two pieces of bearing plates；Start oil pump, jack can L shape bearing plate to two sides be synchronous applies jacking force, which is uniformly applied to by power transmission rod piece closes up a mouthful two sides.Thrustor of the invention is reusable, ensure that the synchronism of jacking force in across two sides beam bodies in being applied to, and solves the problems, such as to close up that pushing tow is asynchronous, structure stress is non-uniform at present.
Description
Technical field
The present invention relates to field of bridge construction, in particular to a kind of concrete continuous rigid structure bridge assembled unbalanced-loading preventing pushing tow dress
It sets and its construction method.
Background technique
Prestressed concrete continuous rigid-framed bridge structure stress is clear, driving is smooth, and has biggish span ability, applies
Widely.Prestressed concrete continuous rigid-framed bridge is pier consolidation system, belongs to statically indeterminate structure.Loss of prestress, coagulation
The factors such as native shrinkage and creep, temperature change can all generate unfavorable additional internal force in beam, so that winner's pier is generated deviation, under span centre
It scratches.Unfavorable phenomena impair bridge road-ability, structure safety and the service life.
In across closing up before, horizontal jacking force is applied to girder, make main pier generate it is pre- partially, can effectively reduce above-mentioned additional
Internal force.Therefore pushing tow appropriate is the common working measure for improving load long term effect and altitude temperature difference effect.Existing pushing tow
Construction is to be equipped with more jack pushing tow simultaneously closing up mouthful multiple internal or external formula stiff skeletons of two sides setting.This top
It pushes away and is difficult to realize synchronize, be easy to keep structure stress uneven；And it is general using being welded to connect, installation and removal construction is complicated.
Summary of the invention
In order to solve the above technical problem, the present invention provides a kind of easy construction, work efficiency is high, the coagulation of uniform force
Native continuous rigid frame bridge assembled unbalanced-loading preventing thrustor, and its construction method is provided.
Technical proposal that the invention solves the above-mentioned problems is: a kind of concrete continuous rigid structure bridge assembled unbalanced-loading preventing pushing tow dress
It sets, including built-in fitting, power transmission rod piece and dynamical system；Built-in fitting includes web built-in fitting and top plate embedded part；Dynamical system packet
Include jack, oil pump and two pieces of bearing plates；The web built-in fitting and top plate embedded part are embedded in continuous rigid frame bridge across two sides
In beam body；Two pieces of bearing plates are oppositely arranged, and respectively by across two sides beam bodies in two sets of power transmission rod pieces and continuous rigid frame bridge
Built-in fitting connection, jack are installed between two pieces of bearing plates.
Above-mentioned concrete continuous rigid structure bridge assembled unbalanced-loading preventing thrustor, the built-in fitting include two web built-in fittings
With a top plate embedded part, web built-in fitting is symmetrically mounted at the neutral axis of beam body both sides, and top plate embedded part is mounted on beam body
Top midline.
Above-mentioned concrete continuous rigid structure bridge assembled unbalanced-loading preventing thrustor, the power transmission rod piece include X-shaped compression bar and drawing
Bar, the pull rod both ends are separately fixed on two web built-in fittings, and the X-shaped compression bar is hinged by first body of rod and second body of rod
It forms and whole in X-shaped, first body of rod and second body of rod one end are separately mounted on two web built-in fittings, first body of rod and the
The bipole body other end is connect with bearing plate.
Above-mentioned concrete continuous rigid structure bridge assembled unbalanced-loading preventing thrustor, the power transmission rod piece further include that auxiliary is stablized
Bar, between the hinge joint and top plate embedded part of the compression bar, between top plate embedded part and the first rod piece, top plate embedded part and second
Auxiliary stabiliser bar is equipped between rod piece, between the first rod piece and the second rod piece；X-shaped compression bar is pressurized when pushing tow works, will be very heavy
Jacking force is uniformly transferred to beam body；Pull rod balance X-shaped compression bar is parallel to the component of cross section, and auxiliary stabiliser bar bears drawing/pressure,
Guarantee X-shaped strut stability.
Above-mentioned concrete continuous rigid structure bridge assembled unbalanced-loading preventing thrustor, first body of rod, second body of rod, auxiliary are steady
Fixed pole is rectangle hollow steel pipe, and the pull rod is that essence pricks spiral.
A kind of construction method of concrete continuous rigid structure bridge assembled unbalanced-loading preventing thrustor, comprising the following steps:
(1) bury built-in fitting: continuous rigid frame bridge complete Bridge Pier Construction, carry out beam body construction, continuous rigid frame bridge construction to last
When a boom segments, two web built-in fittings and a top plate embedded part are buried respectively in two beam bodies for close up mouthful two sides,
Two of them web built-in fitting is embedded at the neutral axis of beam body two sides, and away from a mouthful 3m is closed up, top plate embedded part is embedded at the top of beam body
Midline；
(2) power transmission rod piece is installed: two web built-in fittings are connected with two endpoints of X-shaped compression bar side；It is pre- in two webs
Pull rod is set between embedded part；Between the hinge joint and top plate embedded part of compression bar, between top plate embedded part and the first rod piece, top plate
Auxiliary stabiliser bar is respectively mounted between built-in fitting and the second rod piece, between the first rod piece and the second rod piece；
(3) dynamical system is installed: two pieces of L shape bearing plates are connect with two endpoints of two X-shaped compression bar other sides respectively, and will
Jack is installed between two pieces of L shape bearing plates；
(4) pushing tow and its control: being pushed up with the 25% of jacking force design value in advance first, to eliminate each junction gap, and is checked
Each rod piece working condition then unloads；
(5) if push up in advance it is without exception i.e. according to 25% load grade step by step pushing tow to designing jacking force；Structure is carried out during pushing tow simultaneously
Displacement and stress trajectory；
(6) incremental launching construction is completed: locking stiff skeleton, the interim beam of tensioning；Jack load shedding removes each connecting rod and plate
Part.
The beneficial effects of the present invention are:
1, the present invention uses effective cooperation of single-point dynamical system and assembling truss, realizes greatly across prestressed concrete box-beam bridge
Unbalanced-loading preventing pushing tow.When dynamical system pushing tow, load is symmetrically transferred to beam body two sides by X-shaped compression bar.X-shaped compression bar is by larger
Pressure is easy unstability, is resolved by increasing compression bar section and auxiliary stabiliser bar being arranged.X-shaped compression bar is at web built-in fitting
The thrust for being directed toward web outside can be generated, is balanced by pull rod.Therefore, entire pushing tow system forms a simple list
Push up the symmetrical stress system of pushing tow.Dynamical system single-point stress, keeps structure stress region simple, easy to control, is loading and is unloading
Stage is not in the asynchronous problem of stress of more top pushing tows.Jacking force passes through the assembling truss being arranged symmetrically and symmetrically passes
Power acts at the neutral axis in section, beam body will not be reversed to web.Power transmission rod piece is supported by auxiliary bar, can avoid
Unstability.The present invention, which solves, closes up that pushing tow is asynchronous, the non-uniform construction difficult problem of structure stress at present.
2, in thrustor of the invention, X-shaped compression bar is main stressed member, bears pressure in pushing tow, is easy unstability,
Therefore hollow rectangular section is used, section is made development；It is connect simultaneously using auxiliary stabiliser bar with top plate embedded part, by upper
It states two measures and enhances the stability of X-shaped compression bar.
3, in thrustor of the invention, at the tie point of X-shaped compression bar and web built-in fitting, have biggish perpendicular to web
Component, to balance the component, using pull rod by two nodes to drawing.Since pull rod does not save as stability problem, to mitigate
Dead load, pull rod prick screw-thread steel using high-strength essence.
Detailed description of the invention
Fig. 1 is for continuous rigid frame bridge across the schematic diagram for closing up link progress pushing tow in.
Fig. 2 is the top view of thrustor of the present invention.
Fig. 3 is the schematic enlarged-scale view of dynamical system in thrustor of the present invention.
Fig. 4 is I-I schematic cross-section in Fig. 2.
Fig. 5 is II-II schematic cross-section in Fig. 2.
Fig. 6 is the construction process figure of thrustor of the present invention.
In figure: 1- bridge pier, 2- beam body, 3- close up mouth, 4- web built-in fitting, 5- top plate embedded part, 6- compression bar, 7- pull rod,
8- assists stabiliser bar, 9- bearing plate, 10- jack.
Specific embodiment
The present invention is further illustrated with case study on implementation with reference to the accompanying drawing.
As shown in Fig. 2, a kind of concrete continuous rigid structure bridge assembled unbalanced-loading preventing thrustor, including built-in fitting, transmission rod
Part and dynamical system.
The dynamical system includes that jack 10, oil pump and two pieces of L shape bearing plates 9, two pieces of bearing plates 9 are oppositely arranged, and thousand
Jin top 10 is installed between two pieces of L shape bearing plates 9, applies jacking force by oil pump；Two pieces of L shape bearing plates 9 pass through two sets respectively
Power transmission rod piece is connect with the built-in fitting in beam bodies across two sides in continuous rigid frame bridge.
As shown in Fig. 2, Fig. 4, Fig. 5, the built-in fitting include two web built-in fittings 4 and a top plate embedded part 5, two
Web built-in fitting 4 is symmetrically and fixedly mounted at 2 both sides neutral axis of beam body, top plate embedded part 5 is fixedly mounted on 2 top of beam body
Midline.
As Figure 2-Figure 5, the power transmission rod piece includes compression bar 6, pull rod 7 and auxiliary stabiliser bar 8,7 both ends of pull rod
It being separately fixed on two web built-in fittings 4, the compression bar 6 is hingedly formed by first body of rod and second body of rod and entirety is in X-shaped,
First body of rod and second body of rod one end are separately mounted on two web built-in fittings 4, first body of rod and second body of rod other end with
Bearing plate 9 connect, between the hinge joint and top plate embedded part 5 of the compression bar 6, between top plate embedded part 5 and the first rod piece, top plate
Auxiliary stabiliser bar 8 is equipped between built-in fitting 5 and the second rod piece, between the first rod piece and the second rod piece.First body of rod,
Bipole body, auxiliary stabiliser bar 8 are rectangle hollow steel pipe, and the pull rod 7 is that essence pricks spiral.
The operation principle of the present invention is that: jack 10 is arranged between two pieces of L shape bearing plates 9, and two pieces of L shape bearing plates 9 are logical
It crosses power transmission rod piece and is connect with the built-in fitting being mounted in beam body 2, when construction starts oil pump, and jack 10 can be to the pressure-bearing of two sides
Plate 9 is synchronous to apply jacking force, jacking force by power transmission rod piece pass in the beam body 2 across two sides, thus in ensure that and being applied to
The synchronism of jacking force in across two sides beam bodies 2 solves and closes up that pushing tow is asynchronous, structure stress non-uniform construction hardly possible at present
Topic, has a good application prospect.
As shown in fig. 6, construction process of the invention the following steps are included:
(1) bury built-in fitting: continuous rigid frame bridge completes bridge pier 1 and constructs, and carries out beam body 2 and constructs, in two beams for closing up 3 two sides of mouth
Two web built-in fittings 4 are buried respectively on body 2 and a top plate embedded part 5, two of them web built-in fitting 4 are embedded in beam body 2
At two coxostermums, distance of the web built-in fitting 4 away from cantilever end is 3m；Top plate embedded part 5 is embedded in 2 top plate midline of beam body (i.e.
Cantilever end).
(2) power transmission rod piece is installed: by two of two web built-in fittings 4 and 6 side of X-shaped compression bar in each beam body 2
1., 2. a endpoint is connected to form node, node 1., 2. between be arranged pull rod 7；3. the hinge joint of X-shaped compression bar 6 is set as node；Top
4. plate built-in fitting 5 is set as node；With auxiliary stabiliser bar 8 will 3., 4. node connects；Use auxiliary stabiliser bar 8 by X in cantilever end section
4., 5., 6. 6 liang of bodies of rod of shape compression bar, top plate embedded part 5 connect two-by-two forms node.
(3) dynamical system is installed: by two pieces of L shape bearing plates 9, two endpoint spiral shells with two 6 other sides of X-shaped compression bar respectively
It tethers and connects to form node 7., 8., and jack 10 is installed between two pieces of L shape bearing plates 9.
(4) pushing tow and its control: being pushed up with the 25% of jacking force design value in advance first, to eliminate each junction gap, and
It checks each rod piece working condition, then unloads.
(5) if push up in advance it is without exception can according to 25% load grade step by step pushing tow to designing jacking force.During pushing tow simultaneously into
The observation of row displacement structure and stress.
(6) incremental launching construction is completed: locking stiff skeleton, the interim beam of tensioning；Jack load shedding removes each connecting rod
With plate.
Claims (6)
1. a kind of concrete continuous rigid structure bridge assembled unbalanced-loading preventing thrustor, it is characterised in that: including built-in fitting, power transmission rod piece
And dynamical system；Built-in fitting includes web built-in fitting and top plate embedded part；Dynamical system includes jack, oil pump and two pieces of pressure-bearings
Plate；The web built-in fitting and top plate embedded part are embedded in continuous rigid frame bridge in across two sides beam bodies；Two pieces of bearing plates are opposite to be set
It sets, and is connect respectively by two sets of power transmission rod pieces with the built-in fitting in beam bodies across two sides in continuous rigid frame bridge, jack is installed on
Between two pieces of bearing plates.
2. concrete continuous rigid structure bridge assembled unbalanced-loading preventing thrustor according to claim 1, it is characterised in that: described
Built-in fitting includes two web built-in fittings and a top plate embedded part, and web built-in fitting is symmetrically mounted on beam body both sides neutral axis
Place, top plate embedded part are mounted on midline at the top of beam body.
3. concrete continuous rigid structure bridge assembled unbalanced-loading preventing thrustor according to claim 2, it is characterised in that: described
Power transmission rod piece includes X-shaped compression bar and pull rod, and the pull rod both ends are separately fixed on two web built-in fittings, the X-shaped compression bar
It is hingedly formed by first body of rod and second body of rod and whole in X-shaped, first body of rod and second body of rod one end are separately mounted to two
On web built-in fitting, first body of rod and second body of rod other end are connect with bearing plate.
4. concrete continuous rigid structure bridge assembled unbalanced-loading preventing thrustor according to claim 3, it is characterised in that: described
Power transmission rod piece further includes auxiliary stabiliser bar, between the hinge joint and top plate embedded part of the compression bar, top plate embedded part and the first bar
Auxiliary stabiliser bar is equipped between part, between top plate embedded part and the second rod piece, between the first rod piece and the second rod piece；Pushing tow work
X-shaped compression bar is pressurized when making, and jack thrust is uniformly transferred to beam body；Pull rod balance X-shaped compression bar is parallel to the component of cross section,
It assists stabiliser bar to bear drawing/pressure, guarantees X-shaped strut stability.
5. concrete continuous rigid structure bridge assembled unbalanced-loading preventing thrustor according to claim 4, it is characterised in that: described
First body of rod, second body of rod, auxiliary stabiliser bar are rectangle hollow steel pipe, and the pull rod is that essence pricks spiral.
6. a kind of construction method of concrete continuous rigid structure bridge assembled unbalanced-loading preventing thrustor according to claim 5,
The following steps are included:
(1) bury built-in fitting: continuous rigid frame bridge complete Bridge Pier Construction, carry out beam body construction, continuous rigid frame bridge construction to last
When a boom segments, two web built-in fittings and a top plate embedded part are buried respectively in two beam bodies for close up mouthful two sides,
Two of them web built-in fitting is embedded at the neutral axis of beam body two sides, and away from a mouthful 3m is closed up, top plate embedded part is embedded at the top of beam body
Midline；
(2) power transmission rod piece is installed: two web built-in fittings are connected with two endpoints of X-shaped compression bar side；It is pre- in two webs
Pull rod is set between embedded part；Between the hinge joint and top plate embedded part of compression bar, between top plate embedded part and the first rod piece, top plate
Auxiliary stabiliser bar is respectively mounted between built-in fitting and the second rod piece, between the first rod piece and the second rod piece；
(3) dynamical system is installed: two pieces of L shape bearing plates are connect with two endpoints of two X-shaped compression bar other sides respectively, and will
Jack is installed between two pieces of L shape bearing plates；
(4) pushing tow and its control: being pushed up with the 25% of jacking force design value in advance first, to eliminate each junction gap, and is checked
Each rod piece working condition then unloads；
(5) if push up in advance it is without exception i.e. according to 25% load grade step by step pushing tow to designing jacking force；Structure is carried out during pushing tow simultaneously
Displacement and stress trajectory；
(6) incremental launching construction is completed: locking stiff skeleton, the interim beam of tensioning；Jack load shedding removes each connecting rod and plate
Part.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811645154.0A CN109610339B (en) | 2018-12-29 | 2018-12-29 | Assembled type unbalanced load preventing pushing device for concrete continuous rigid frame bridge and construction method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811645154.0A CN109610339B (en) | 2018-12-29 | 2018-12-29 | Assembled type unbalanced load preventing pushing device for concrete continuous rigid frame bridge and construction method thereof |
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| Publication Number | Publication Date |
|---|---|
| CN109610339A true CN109610339A (en) | 2019-04-12 |
| CN109610339B CN109610339B (en) | 2024-02-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811645154.0A Active CN109610339B (en) | 2018-12-29 | 2018-12-29 | Assembled type unbalanced load preventing pushing device for concrete continuous rigid frame bridge and construction method thereof |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110644367A (en) * | 2019-09-19 | 2020-01-03 | 中铁大桥科学研究院有限公司 | Closure method and closure system for steel box girder of cable-stayed bridge |
| CN112391950A (en) * | 2020-10-14 | 2021-02-23 | 华南理工大学 | Device and method for adjusting center line deviation of closure opening of high-tower and low-tower cable-stayed bridge |
| CN112632737A (en) * | 2019-09-23 | 2021-04-09 | 华龙国际核电技术有限公司 | Embedded part neutral axis determination method and device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB808977A (en) * | 1955-11-10 | 1959-02-18 | Stephen Revesz | Method of connecting structural concrete members |
| CN202323782U (en) * | 2011-11-24 | 2012-07-11 | 中铁二十三局集团有限公司 | Bridge supporting device for mid-span closure sections |
| CN204855267U (en) * | 2015-08-26 | 2015-12-09 | 西安公路研究院 | Overpass steel guardrail is anti to be pushed away rigidity test and uses horizontal loading device |
| CN209538039U (en) * | 2018-12-29 | 2019-10-25 | 湖南科技大学 | One kind closing up thrustor for prestressed concrete continuous rigid-framed bridge |
-
2018
- 2018-12-29 CN CN201811645154.0A patent/CN109610339B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB808977A (en) * | 1955-11-10 | 1959-02-18 | Stephen Revesz | Method of connecting structural concrete members |
| CN202323782U (en) * | 2011-11-24 | 2012-07-11 | 中铁二十三局集团有限公司 | Bridge supporting device for mid-span closure sections |
| CN204855267U (en) * | 2015-08-26 | 2015-12-09 | 西安公路研究院 | Overpass steel guardrail is anti to be pushed away rigidity test and uses horizontal loading device |
| CN209538039U (en) * | 2018-12-29 | 2019-10-25 | 湖南科技大学 | One kind closing up thrustor for prestressed concrete continuous rigid-framed bridge |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110644367A (en) * | 2019-09-19 | 2020-01-03 | 中铁大桥科学研究院有限公司 | Closure method and closure system for steel box girder of cable-stayed bridge |
| CN112632737A (en) * | 2019-09-23 | 2021-04-09 | 华龙国际核电技术有限公司 | Embedded part neutral axis determination method and device |
| CN112632737B (en) * | 2019-09-23 | 2024-02-20 | 华龙国际核电技术有限公司 | Method and device for determining neutral axis of embedded part |
| CN112391950A (en) * | 2020-10-14 | 2021-02-23 | 华南理工大学 | Device and method for adjusting center line deviation of closure opening of high-tower and low-tower cable-stayed bridge |
| CN112391950B (en) * | 2020-10-14 | 2021-10-26 | 华南理工大学 | Device and method for adjusting center line deviation of closure opening of high-tower and low-tower cable-stayed bridge |
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| Publication number | Publication date |
|---|---|
| CN109610339B (en) | 2024-02-20 |
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