CN106498842A - A kind of voluntarily axle beam and its method of construction under existing elevated bridge - Google Patents
A kind of voluntarily axle beam and its method of construction under existing elevated bridge Download PDFInfo
- Publication number
- CN106498842A CN106498842A CN201611176006.XA CN201611176006A CN106498842A CN 106498842 A CN106498842 A CN 106498842A CN 201611176006 A CN201611176006 A CN 201611176006A CN 106498842 A CN106498842 A CN 106498842A
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- Prior art keywords
- bracket
- tie
- longeron
- cross beam
- girder
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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
- E01D18/00—Bridges specially adapted for particular applications or functions not provided for elsewhere, e.g. aqueducts, bridges for supporting pipe-lines
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D2/00—Bridges characterised by the cross-section of their bearing spanning structure
- E01D2/04—Bridges characterised by the cross-section of their bearing spanning structure of the box-girder type
-
- 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
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Bridges Or Land Bridges (AREA)
Abstract
The invention discloses a kind of voluntarily axle beam and its method of construction under existing elevated bridge, this voluntarily axle beam include some steel box-girder groups, some pier studs and hand banisters, steel box-girder group is welded to form by some steel box girder assemblings, steel box-girder includes bracket, cross beam support system, bracket tie-beam and middle tie-beam, steel box-girder connection is assemblied into entirety, installs hand banisters above steel box-girder group both sides.Its method of construction includes prefabricated steel box-girder, installation pier stud, installs the step such as bracket and cross beam support system, assembled welding, application, installation accessory structure.The present invention takes full advantage of the space under overpass, alleviates urban land pressure, provides solution for road traffic congestion blockage problem.
Description
Technical field
A kind of the present invention relates to municipal works technical field, more particularly to voluntarily axle beam under existing elevated bridge.
Background technology
In order to improve the traffic capacity of road in city, often divide in and take setting elevated bridge, elevated bridge can
Current as common vehicle or special car, overpass typically has two tracks, Four-Lane Road, six-lane, width to be generally 10 meters,
18 meters, 26 meters, in point band generally 4 meters, 6 meters, 8 meters of width, under-clearance is more than 5 meters, but in order to ensure permeability under bridge,
General overpass is apart from more than 10 meters of road under bridge face.
With the increase of urban population and urban traffic flow, existing urban land is more and more nervous.Surface road and
The motor vehicles of elevated bridge road are increasing, surface road to also bear simultaneously pedestrian, non-motor vehicle current, driving is difficult,
The problems such as parking difficulty, traffic order are chaotic is increasingly highlighted, and the impact and pressure caused by urban traffic control is increasing.City
Road traffic congestion blockage problem become restriction economic development, reduce people's living standard, weaken economic vitality bottleneck it
One.
Content of the invention
It is an object of the invention to provide a kind of voluntarily axle beam under existing elevated bridge, makes full use of under overpass
Space, to alleviate urban traffic pressure, for achieving the above object, the present invention is employed the following technical solutions:
A kind of voluntarily axle beam under existing elevated bridge, including some steel box-girder groups, some pier studs and hand banisters, institute
The steel box-girder group that states is located at below existing elevated bridge, and described steel box-girder group is welded to form by some steel box girder assemblings, described
Steel box-girder include bracket, cross beam support system, bracket tie-beam and middle tie-beam, described bracket and cross beam support system
Lower section connection pier stud, described pier stud is in staggered distribution with the bridge pier of existing overpass, described bracket both sides and bracket tie-beam
Overlap joint, described cross beam support system both sides and middle tie-beam welding, described bracket tie-beam and middle tie-beam welding,
Weld between described middle tie-beam, connect steel box-girder and be assemblied into entirety, install above described steel box-girder group both sides and help
Hand-rails.
Wherein, described bracket includes integrally formed first crossbeam, is located at two group first of first crossbeam both sides respectively
Longeron, the capital section being located at below first crossbeam, the width of described first crossbeam width more than existing bridge pier, described first
Longeron bottom is provided with overlap joint seat, and described capital section is connected with pier stud;Described cross beam support system includes integrally formed
Two crossbeams, two group of second longeron for being located at second cross beam both sides, the second capital section being located at below second cross beam, described second
Capital section is connected with pier stud;Described bracket tie-beam includes the 3rd longeron of two parallel layings, the 3rd described longeron side
Top is provided with overlap joint platform, and described overlap joint platform is engaged with overlap joint seat;Described middle tie-beam includes the of two parallel layings
Four longerons, the side of described the 4th longeron and the 3rd longitudinal beam welding;Described first crossbeam is identical with second cross beam section,
The beam type of the first longeron, the second longeron, the 3rd longeron and the 4th longeron is identical.
Further, also include binder, in the middle part of the 3rd described longeron and the 4th longeron, be provided with support, described binder peace
It is mounted on support.
Wherein, the first described longeron, the second longeron, the 3rd longeron, the beam type of the 4th longeron are cantilevered, including top
Plate, base plate, two webs, some ribbed stiffeners, described two webs connection top board and base plate, ribbed stiffener are located at top board, base plate and abdomen
On plate, described top end is provided with the edge of a wing, and the edge of a wing is connected with base plate using swash plate.
Preferably, the first described longeron, the second longeron, the 3rd longeron, the transverse section of the beam type of the 4th longeron are inner side
Arc-shaped sections of the thickness more than outside.
Further, between described first crossbeam and capital section, pier top is provided between second cross beam and the second capital section
Backing plate.
Preferably, decorative panel is additionally provided with below described first crossbeam and second cross beam, described decorative panel is and first
Crossbeam or second cross beam bottom arcwall face match the arc of connection.
Preferably, a steel box-girder group includes the bracket of front and back end two, two cross beam support systems at middle part, two brackets
Tie-beam and four middle tie-beams;A bracket tie-beam and a centre is provided between described bracket and cross beam support system
Tie-beam, is provided with two middle tie-beams between two cross beam support systems.
The invention also discloses a kind of method of construction of the voluntarily axle beam under existing elevated bridge, using claim
The structure of 1~5 any one, comprises the following steps:
S1. steel box-girder is prefabricated:Position dimension according to existing elevated bridge determines the position dimension of bicycle bridge steel structural unit,
Prefabrication processing pier stud, bracket, cross beam support system, bracket tie-beam and middle tie-beam, transport to scene;
S2., pier stud is installed:Voluntarily the bridge pier of the pier stud of axle beam and existing elevated bridge staggers installation;
S3., bracket and cross beam support system are installed:Lifting bracket or cross beam support system on the pier stud of step S2;Make bracket
Second capital section erecting and welding of capital section or cross beam support system is on pier stud;
S4. assembled welding:Temporary support is set up, segmental hoisting bracket tie-beam and middle tie-beam are in place, weld integral;
S5. application:Overall application, removes temporary support after application;
S6., accessory structure is installed:Hand banisters is installed, carries out deck paving, road surface accessory structure is installed.
Preferably, also include binder installation steps between step S4 and step S5, by binder installed in bracket tie-beam and
Between middle tie-beam.
Preferably, two cross beam support systems are provided between two brackets in step S3;In step S4, bracket is propped up with crossbeam
A bracket tie-beam, tie-beam in the middle of, the overlap joint platform of bracket tie-beam and the overlap joint seat of bracket is lifted between support body system
It is engaged, the opposite side of bracket tie-beam is welded with middle tie-beam;Lift two centres to connect between two cross beam support systems
Beam is connect, tie-beam side is welded mutually in the middle of two, opposite side is welded with cross beam support system.
Preferably, street lamp is installed in existing elevated bridge lower end, as the illuminating lamp of voluntarily axle beam.
The present invention has the advantages that:Structural system of the present invention using first crossbeam floor side member, using space under bridge,
By existing overhead hydrodynamic conditions, it is divided to two side girders to arrange that, by the requirement of driveway under bridge, pier stud can not directly stand in driveway
On, can only divide band middle in standing in, by arranging beam structure, undertake the support of longeron.The present invention is made full use of under overpass
Space, builds voluntarily axle beam, as the light load occupation bridge such as bicycle, does not affect the current of motor vehicles under bridge, again can be with
Carry out sheltering from heat or light keeping off the rain using existing elevated bridge, coordinate with existing overpass from landscape and on structure stress, have larger reality
Border meaning.
Description of the drawings
Fig. 1 is structural representation of the present invention under existing elevated bridge.
Fig. 2 is the schematic front view of a steel box-girder group.
Fig. 3 is the schematic top plan view of Fig. 2.
Fig. 4 is the A-A section enlarged diagrams of Fig. 2.
Fig. 5 is the B-B section enlarged diagrams of Fig. 2.
Fig. 6 is the structural representation of bracket.
Fig. 7 is the structural representation of cross beam support system.
Fig. 8 is the structural representation of bracket tie-beam.
Fig. 9 is the structural representation of middle tie-beam.
Figure 10 is steel box girder assembling structural representation.
Figure 11 is lifting construction schematic diagram of the present invention.
Figure 12 is use state schematic diagram of the present invention.
Primary clustering symbol description:
1′:Existing elevated bridge, 2 ':Bridge pier, 3 ':Temporary support, 4 ':Hoisting machine, 1:Voluntarily axle beam, 2:Pier stud, 3:Bracket,
31:First crossbeam, 32:First longeron, 33:Capital section, 34:Overlap joint seat, 4:Cross beam support system, 41:Second cross beam, 42:The
Two longerons, 43:Second capital section, 5:Bracket tie-beam, 51:3rd longeron, 52:Overlap joint platform, 6:Middle tie-beam, 61:4th
Longeron, 62:Top board, 63:Base plate, 64:Web, 65:Ribbed stiffener, 66:The edge of a wing, 7:Binder, 71:Support, 8:Pier top backing plate, 9:Dress
Plaque, 10:Hand banisters, 11:Street lamp.
Specific embodiment
In order that those skilled in the art more fully understands technical scheme, below in conjunction with the accompanying drawings and concrete real
The present invention is described in further detail to apply example.
As shown in figure 1, present embodiment discloses a kind of voluntarily axle beam under existing elevated bridge, according on bridge voluntarily
2.5 meters of the Clearance requirement of axle beam, 5.0 meters of car lane Clearance requirement under bridge are limited by 1 ' space under bridge of existing elevated bridge,
Voluntarily 1 deck-molding of axle beam is limited in 1.0 meters or so, is to mate with existing elevated bridge 1 ', voluntarily 1 across footpath of axle beam adopt with both
There is 1 ' close across footpath of elevated bridge, based on 30 meters of across footpaths.
Voluntarily axle beam 1 includes some steel box-girder groups, some pier studs 2 and hand banisters 10.Steel box-girder group is located at existing
1 ' lower section of elevated bridge, as shown in Figure 10, steel box-girder group is welded to form by some steel box girder assemblings, and steel box-girder includes bracket 3, horizontal stroke
Beam support system 4, bracket tie-beam 5, middle tie-beam 6 and binder 7.Hand banisters 10 is installed above steel box-girder group both sides.This
Two cross beam support systems, 4, the two bracket tie-beams 5 of a steel box-girder group by two brackets 3, middle part in front and back end in embodiment
And tie-beam 6 is constituted in the middle of four.As shown in Figure 2 and Figure 3, a bracket tie-beam 5 is provided between bracket 3 and cross beam support system 4
And tie-beam 6 in the middle of, two middle tie-beams 6 are provided between two cross beam support systems 4.Bracket 3 and cross beam support system 4
Lower section connection pier stud 2, pier stud 2 are in staggered distribution with the bridge pier 2 ' of existing elevated bridge 1 ', and steel box-girder connection is assemblied into entirety.Below
Explanation is described in detail to said structure.
As shown in fig. 6, bracket 3 includes first crossbeam 31, two group of first longeron 32, capital section 33.Two group of first longeron 32
First crossbeam 31 both sides are located at respectively, and first crossbeam 31 is integrally formed with the first longeron 32.First longeron, 32 bottom is provided with overlap joint
Seat 34.Capital section 33 is located at below first crossbeam 31, and capital section 33 is connected with pier stud 2.31 width of first crossbeam is more than existing bridge
The width of pier 2 ', is made the first longeron 32 of both sides be located at 2 ' both sides of existing bridge pier, is not interfered with existing bridge pier 2 '.
As shown in fig. 7, cross beam support system 4 includes 41, two group of second longeron 42 of second cross beam, the second capital section 43.Two
The second longeron 42 of group is located at 41 both sides of second cross beam respectively, and second cross beam 41 is integrally formed with the second longeron 42.Second capital section
43 are located at below second cross beam 41, and the second capital section 43 is connected with pier stud 2.Second cross beam 41 is identical with 31 section of first crossbeam.
As shown in figure 8, bracket tie-beam 5 includes the 3rd longeron 51 of two parallel layings.3rd longeron, 51 1 upper lateral part sets
There are overlap joint platform 52, overlap joint platform 52 to be engaged with overlap joint seat 34.It is provided with the middle part of 3rd longeron 51 for installing the support 71 of binder 7.
As shown in figure 9, middle tie-beam 6 includes the 4th longeron 61 of two parallel layings.Use is provided with the middle part of 4th longeron 61
In the support 71 for installing binder 7.
The beam type of the first longeron 32, the second longeron 42, the 3rd longeron 51 and the 4th longeron 61 is identical.As shown in Figure 4,5, beam
Type is cantilevered, including top board 62, base plate 63, two webs 64, some ribbed stiffeners 65.The connection top board 62 of two web 64 and base plate
63, on top board 62, base plate 63 and the web 64,62 end of top board is provided with the edge of a wing 66 to ribbed stiffener 65, the edge of a wing 66 using swash plate with
Base plate 63 is connected.The transverse section of beam type is arc-shaped sections of the inner thickness more than outside.Using the transverse section, first is optimized horizontal
Beam 31 and the stress of second cross beam 41, are mutually coordinated with existing elevated bridge 1 ', reduce under bridge driveway space repressive, whole
Body is slimmer and more graceful.Such as Fig. 5, first crossbeam 31 and capital section 33(And second cross beam 41 and the second capital section 43)Between be provided with pier top
Backing plate 8, first crossbeam 31(And second cross beam 41)Lower section is provided with decorative panel 9, and decorative panel 9 is and first crossbeam 31(And second is horizontal
Beam 41)Bottom arcwall face matches the arc of connection.
The invention also discloses the method for construction of above-mentioned voluntarily axle beam, details are as follows for step.
(1). steel box-girder is prefabricated:According to the position that the position dimension of existing elevated bridge 1 ' determines voluntarily 1 steel beam column of axle beam
Size is put, the processing pier stud 2 that is prefabricated in the factory, bracket 3, cross beam support system 4, bracket tie-beam 5 and middle tie-beam 6, transport
To scene.
(2). pier stud 2 is installed:Voluntarily the pier stud 2 of axle beam 1 and the bridge pier 2 ' of existing elevated bridge 1 ' stagger installation.
(3). bracket 3 and cross beam support system 4 are installed:Lifting bracket 3 or cross beam support system on the pier stud 2 of step S2
4.Two cross beam support systems 4 are lifted between two brackets 3.The capital section of bracket is located at directly over pier stud, weld capital
At the top of section and pier stud, bracket is made to be fixed on pier stud.The second capital section of cross beam support system is made to be located at directly over pier stud, welding
At the top of second capital section and pier stud, cross beam support system is made to be fixed on pier stud.
(4). assembled welding:As shown in figure 11, temporary support 3 ' is set up, with 4 ' segmental hoisting bracket tie-beam 5 of hoisting machine
And centre tie-beam 6 is in place, welds integral.One bracket tie-beam 5 of lifting between bracket 3 and cross beam support system 4, one
Middle tie-beam 6, the overlap joint platform 52 of bracket tie-beam 5 are engaged with the overlap joint seat 34 of bracket 3, the opposite side of bracket tie-beam 5
Weld with middle tie-beam 6;Tie-beam 6 in the middle of two are lifted between two cross beam support systems 4, tie-beam 6 one in the middle of two
Side is welded mutually, and opposite side is welded with cross beam support system 4.
(5). binder is installed:Binder 7, the support 71 in the middle part of the 4th longeron 61 are installed on the support 71 in the middle part of the 3rd longeron 51
Upper installation binder 7, to improve overall support strength.
(6). application:Overall application, removes temporary support 3 ' after application.
(7). accessory structure is installed:Hand banisters 10 is installed, carries out deck paving, road surface accessory structure is installed.Existing
Street lamp 11 is installed in 1 ' lower end of elevated bridge, used as the illuminating lamp of voluntarily axle beam 1.
As shown in figure 12, present invention construction completes to come into operation, voluntarily axle beam 1 and existing elevated bridge 1 '(Such as city
BRT bridges)System merges, and voluntarily axle beam 1 is supported using own pier stud 2, and safety of structure is good.Voluntarily axle beam 1 was using both
There is 1 ' lower space of elevated bridge, do not occupy new land used, it is ensured that on bridge, cycle headroom(2.5m)With bridge down train clear height(5m), empty
Between effectively utilizes.In addition to it can be used for special bicycle and be current, other non-motor vehicles that could be applicable to underload pass through the present invention,
Such as footpath, electronic driveway etc., alleviate urban land pressure, solution is provided for road traffic congestion blockage problem.
The above, the only present invention preferably specific embodiment, but protection scope of the present invention is not limited thereto,
Any those familiar with the art the invention discloses technical scope in, the change or replacement that can readily occur in,
Should all be included within the scope of the present invention.
Claims (12)
1. a kind of voluntarily axle beam under existing elevated bridge, it is characterised in that:Including some steel box-girder groups, some pier studs
And hand banisters, below existing elevated bridge, described steel box-girder group is by some steel box girder assemblings for described steel box-girder group
It is welded to form, described steel box-girder includes bracket, cross beam support system, bracket tie-beam and middle tie-beam, described bracket
And below cross beam support system, connecting pier stud, described pier stud is in staggered distribution with the bridge pier of existing elevated bridge, described bracket
Both sides are overlapped with bracket tie-beam, and described cross beam support system both sides are welded with middle tie-beam, described bracket tie-beam
Weld with middle tie-beam, weld between described middle tie-beam, connect steel box-girder and be assemblied into entirety, described steel box-girder
Group installs hand banisters above both sides.
2. voluntarily axle beam under existing elevated bridge as claimed in claim 1, it is characterised in that:Described bracket includes
Integrally formed first crossbeam, two group of first longeron for being located at first crossbeam both sides respectively, the capital being located at below first crossbeam
Section, described first crossbeam width are more than the width of the bridge pier of existing elevated bridge, and the first described longeron bottom is provided with overlap joint
Seat, described capital section are connected with pier stud;Described cross beam support system includes integrally formed second cross beam, is located at the second horizontal stroke
Two group of second longeron of beam both sides, the second capital section being located at below second cross beam, the second described capital section are connected with pier stud;
Described bracket tie-beam includes that the 3rd longeron of two parallel layings, described one upper lateral part of the 3rd longeron are provided with overlap joint platform, institute
The overlap joint platform that states is engaged with overlap joint seat;Described middle tie-beam includes the 4th longeron of two parallel layings, the described the 4th
The side of longeron and the 3rd longitudinal beam welding;Described first crossbeam is identical with second cross beam section, the first longeron, the second longeron,
The beam type of the 3rd longeron and the 4th longeron is identical.
3. voluntarily axle beam under existing elevated bridge as claimed in claim 2, it is characterised in that:Also include binder, institute
The 3rd longeron that states and support in the middle part of the 4th longeron, is provided with, described binder is rack-mount.
4. voluntarily axle beam under existing elevated bridge as claimed in claim 3, it is characterised in that:Described first is indulged
Beam, the second longeron, the 3rd longeron, the beam type of the 4th longeron are cantilevered, including top board, base plate, two webs, some ribbed stiffeners,
Described two webs connection top board and base plate, on top board, base plate and web, described top end is provided with the wing to ribbed stiffener
Edge, the edge of a wing are connected with base plate using swash plate.
5. voluntarily axle beam under existing elevated bridge as claimed in claim 4, it is characterised in that:Described first is indulged
Beam, the second longeron, the 3rd longeron, the transverse section of the beam type of the 4th longeron are arc-shaped sections of the inner thickness more than outside.
6. voluntarily axle beam under existing elevated bridge as claimed in claim 5, it is characterised in that:Described first crossbeam
Between capital section, between second cross beam and the second capital section, pier top backing plate is provided with.
7. voluntarily axle beam under existing elevated bridge as claimed in claim 6, it is characterised in that:Described first crossbeam
And decorative panel below second cross beam, is additionally provided with, described decorative panel is to match with first crossbeam or second cross beam bottom arcwall face
The arc of connection.
8. the voluntarily axle beam under existing elevated bridge that such as the arbitrary office of claim 1~7 is stated, it is characterised in that:One
Steel box-girder group includes that the bracket of front and back end two, two cross beam support systems at middle part, two bracket tie-beams and four centres connect
Connect beam;Tie-beam in the middle of a bracket tie-beam and one, two crossbeams are provided between described bracket and cross beam support system
Tie-beam in the middle of being provided with two between support body system.
9. a kind of method of construction of the voluntarily axle beam under existing elevated bridge, it is characterised in that using claim 1~8
The structure of any one, comprises the following steps:
S1. steel box-girder is prefabricated:Position dimension according to existing elevated bridge determines the position dimension of bicycle bridge steel structural unit,
Prefabrication processing pier stud, bracket, cross beam support system, bracket tie-beam and middle tie-beam, transport to scene;
S2., pier stud is installed:Voluntarily the bridge pier of the pier stud of axle beam and existing elevated bridge staggers installation;
S3., bracket and cross beam support system are installed:On the pier stud of step S2, lifting bracket or cross beam support system, make bracket
Second capital section erecting and welding of capital section or cross beam support system is on pier stud;
S4. assembled welding:Temporary support is set up, segmental hoisting bracket tie-beam and middle tie-beam are in place, weld integral;
S5. application:Overall application, removes temporary support after application;
S6., accessory structure is installed:Hand banisters is installed, carries out deck paving, road surface accessory structure is installed.
10. the method for construction of voluntarily axle beam under existing elevated bridge as claimed in claim 9, it is characterised in that step
Suddenly binder installation steps are also included between S4 and step S5, by binder between bracket tie-beam and middle tie-beam.
The method of construction of the 11. voluntarily axle beams under existing elevated bridge as claimed in claim 9, it is characterised in that step
Two cross beam support systems are provided between two brackets in rapid S3;In step S4, one between bracket and cross beam support system, is lifted
Individual bracket tie-beam, tie-beam in the middle of, the overlap joint platform of bracket tie-beam are engaged with the overlap joint seat of bracket, bracket tie-beam
Opposite side and middle tie-beam welding;Tie-beam in the middle of two are lifted between two cross beam support systems, connection in the middle of two
Beam side is welded mutually, and opposite side is welded with cross beam support system.
The method of construction of the 12. voluntarily axle beams under existing elevated bridge as claimed in claim 9, it is characterised in that
Street lamp is installed in existing elevated bridge lower end, used as the illuminating lamp of voluntarily axle beam.
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CN112609574A (en) * | 2020-11-16 | 2021-04-06 | 中冶(上海)钢结构科技有限公司 | Construction method for temporarily fixing complex steel box girder with through-length stiffening rib at high altitude |
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