CN105755945B - A kind of triangle steel truss bridge of Y shape point limb - Google Patents
A kind of triangle steel truss bridge of Y shape point limb Download PDFInfo
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- CN105755945B CN105755945B CN201610210386.8A CN201610210386A CN105755945B CN 105755945 B CN105755945 B CN 105755945B CN 201610210386 A CN201610210386 A CN 201610210386A CN 105755945 B CN105755945 B CN 105755945B
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- truss
- purlin piece
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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
- E01D6/00—Truss-type bridges
Abstract
The invention discloses a kind of triangle steel truss bridge of Y shape suitable for below span 200m point limb, including a truss one and two truss two, the bridge main beam that one end of truss one and two truss two are constituted after being intersected in a bit, truss one and two joints of truss two are the purlin highest point high of bridge main beam, bridge main beam is in integrally spatially a tripod, bridge main beam plane is in Y-shaped, two truss two are spliced into V-shaped main couple point limb part in the bridge main beam of Y-shaped, the generally one tripod moulding of this bridge type, planar design is in Y-shaped point limb, Facade form steel truss girder remodeling triangular in shape；This bridge type is on the premise of larger span ability is ensured, the following thickness of bridge floor is small, and integral rigidity is big, and wind resistance anti-seismic performance is good, while its modern design is attractive in appearance can be as city landmark.
Description
Technical field
It is particularly a kind of to be applied to span the present invention relates to the Half-through Steel Truss of bridge bridge alternatives design field
The triangle steel truss bridge of the Y shape of below 200m point limb.
Background technology
Traditional steel truss girder bridge is widely used in highway, railroad bridge construction, is a kind of very strong bridge of span ability
Structure.China has built a large amount of steel truss girder bridges since over half a century, and the bridge type occupies critical role in bridge steel structure.
Now on the premise of Urban Bridge Construction, the aesthetic feeling of building is obviously extremely important；Greatly across truss bridge due to its structure type mistake
In classical, single, it tends to be difficult to the requirement to Bridges.Simultaneously for T-shaped crossing in city, upper island road, expropriation of land is torn open
The specific construction condition such as limited is moved, conventional steel truss girder bridge is difficult to be applied to these situations, generally requires the abnormity using fork
Structure.Based on classical steel truss girder bridge, it is proposed that a kind of suitable for below span 200m, planar design is in Y-shaped point limb, facade
Moulding Half-through Steel Truss triangular in shape, i.e., a kind of steel truss girder remodeling；For the Urban Bridge Construction in the case of above-mentioned is provided
A kind of solution of preferable bridge type.
The content of the invention
The purpose of the present invention, is the triangle steel truss bridge for providing a kind of Y shape suitable for below span 200m point limb,
Its planar design is in Y-shaped point limb, and Facade form is triangular in shape.
The present invention solve its technical problem solution be：A kind of triangle steel truss bridge of Y shape point limb, including one
It is the truss one of triangle or open trapezoid and two to be spliced to form cross section by the vertical connection of crossbeam peace by two panels purlin piece one
The truss two that cross section is L-shaped, the one of the truss one are formed after being spliced by purlin piece two, crossbeam, flat vertical connection and side longeron respectively
The bridge main beam that end and two truss two are constituted after crossing, truss one and two summits of the intersection of the truss two are bridge
The purlin highest point high of girder, the bridge main beam is in integrally spatially a tripod, and bridge main beam plane is in Y-shaped, two
The individual truss two is spliced into V-shaped main couple point limb part in the bridge main beam of Y-shaped.
Used as the further improvement of above-mentioned technical proposal, the purlin piece one includes the top boom of purlin piece one and the lower edge of purlin piece one
Bar, is disposed with the montant of purlin piece one and the brace of purlin piece one, the truss one between the top boom of purlin piece one and the lower boom of purlin piece one
In the vertical connection of crossbeam peace be located between the lower boom of two panels purlin piece one, the purlin piece two includes the top boom of purlin piece two and purlin piece two
Lower boom, is disposed with the montant of purlin piece two and the brace of purlin piece two, the purlin between the top boom of purlin piece two and the lower boom of purlin piece two
The vertical connection of crossbeam peace in frame two is located between side longeron and the lower boom of purlin piece two, respectively the side longeron in two panels truss two
The V-shaped inner space being distributed between two panels truss two, the upper surface of the crossbeam is equipped with bridge floor, the lower edge of purlin piece two
The bar lower boom of purlin piece one docking adjacent thereto, the top boom of purlin piece two top boom of purlin piece one docking adjacent thereto.
As the further improvement of above-mentioned technical proposal, crossbeam in the truss one respectively with two panels purlin piece one in
Coplanar rear triangle or open trapezoid the steelframe of truss one of the montant of purlin piece one, the steelframe of the truss one is by purlin piece one
Chord member, the lower boom of purlin piece one and middle longeron connect and compose truss one；Crossbeam and purlin piece two in the same truss two
L-shaped steelframe is constituted after montant is coplanar, the L-shaped steelframe connects structure by the top boom of purlin piece two, the lower boom of purlin piece two and side longeron
Into truss two.
As the further improvement of above-mentioned technical proposal, positioned at the truss one and the two panels purlin piece of the intersection of truss two
One top is connected by connecting rod between truss.
Used as the further improvement of above-mentioned technical proposal, the plane included angle between the longeron of side in truss two described in two panels is
50 ~ 70 °, the plane included angle between the lower boom of the truss one and its lower boom of adjacent truss two is 150 ~ 160 °.
As the further improvement of above-mentioned technical proposal, the lower boom of purlin piece one, the top boom of purlin piece one, the lower edge of purlin piece two
The cross section of bar and the top boom of purlin piece two is parallelogram, and the crossbeam, the montant of purlin piece one, the brace of purlin piece one, purlin piece two are erected
The cross section of bar and the brace of purlin piece two is box section or H-shaped section.
Used as the further improvement of above-mentioned technical proposal, the lower surface of the truss one and two panels truss two is separately installed with
Substructure.
The beneficial effects of the invention are as follows：
（1）On the premise of larger span ability is ensured, the following structural thickness of bridge type bridge floor in the present invention（Road surface to beam bottom
Thickness）It is smaller；Be spatially simultaneously in Bifurcation Structure, for there is headroom to limit, and right-in and right-out upper island road, T
The special city such as font intersection construction condition, the bridge type of this motion is advantageous relative to other types beam bridge.
（2）Bridge main beam uses the structure of tripod type, and structure integral rigidity is big, and wind resistance anti-seismic performance is good.Particularly should
When bridge type is used for foot bridge beam, it is possible to prevente effectively from the big problem across overpass insufficient rigidity.
（3）This motion bridge-type structure novel form, it is handsome in appearance, can be conducive to lifting city shape as landmark-type building
As.
Brief description of the drawings
Technical scheme in order to illustrate more clearly the embodiments of the present invention, below will be to that will make needed for embodiment description
Accompanying drawing is briefly described.Obviously, described accompanying drawing is a part of embodiment of the invention, rather than whole implementations
Example, those skilled in the art on the premise of not paying creative work, can also obtain other designs according to these accompanying drawings
Scheme and accompanying drawing.
Fig. 1 is side view of the invention；
Fig. 2 is top view of the invention；
Fig. 3 be A-A to sectional view；
Fig. 4 is the sectional view of B-B direction；
Fig. 5 is graphics of the invention；
Fig. 6 is the elevation of purlin piece one；
Fig. 7 is the elevation of purlin piece two.
Specific embodiment
The technique effect of design of the invention, concrete structure and generation is carried out clearly below with reference to embodiment and accompanying drawing
Chu, it is fully described by, to be completely understood by the purpose of the present invention, feature and effect.Obviously, described embodiment is this hair
Bright a part of embodiment, rather than whole embodiments, based on embodiments of the invention, those skilled in the art is not paying
The other embodiment obtained on the premise of creative work, belongs to the scope of protection of the invention.In addition, be previously mentioned in text
All connection/annexations, not singly refer to that component directly connects, and refer to that can be added deduct by adding according to specific implementation situation
Lack couple auxiliary to constitute more excellent draw bail.
A kind of 1~Fig. 7 of reference picture, Y shape divides the triangle steel truss bridge of limb, including one passes through horizontal stroke by two panels purlin piece 1
The vertical connection 4 of the peace of beam 8 be spliced to form cross section for the truss 1 of triangle or open trapezoid and two respectively by purlin piece 2 24,
It is the truss 22 of L-shaped, one end of the truss 1 and two panels that crossbeam 8, flat vertical connection 4 and side longeron 5 form cross section after splicing
The bridge main beam that truss 22 is constituted after crossing, the summit of the intersection of truss 22 described in truss 1 and two panels is bridge main beam
Purlin highest point high, the bridge main beam spatially integrally be in a tripod, bridge main beam plane be in Y-shaped, two panels institute
State truss 22 and be spliced into V-shaped main couple point limb part in the bridge main beam of Y-shaped.
It is further used as preferred embodiment, the purlin piece 1 includes the top boom 10 of purlin piece one and the lower edge of purlin piece one
Bar 13, is disposed with the montant 12 of purlin piece one and the brace 11 of purlin piece one between the top boom 10 of the purlin piece one and the lower boom 13 of purlin piece one,
The vertical connection 4 of the peace of crossbeam 8 in the truss 1 is located between the lower boom 13 of two panels purlin piece one, and the purlin piece 2 24 includes purlin piece
Two top booms 20 and the lower boom 23 of purlin piece two, purlin piece is disposed between the top boom 20 of the purlin piece two and the lower boom 23 of purlin piece two
Two montants 22 and the brace 21 of purlin piece two, the vertical connection 4 of the peace of crossbeam 8 in the truss 22 are located at side longeron 5 and the lower boom of purlin piece two
Between 23, the V-shaped inner space being distributed between two panels truss 22 of side longeron 5 respectively in two panels truss 22, institute
The upper surface for stating crossbeam 8 is equipped with bridge floor 7, and the lower boom 13 of two 23 purlin piece adjacent thereto of lower boom of the purlin piece one is docked, institute
The top boom 10 of two 20 purlin piece adjacent thereto of top boom of purlin piece one is stated to dock.
Be further used as preferred embodiment, the crossbeam 8 in the truss 1 respectively with two panels purlin piece 1 in
Coplanar rear triangle or open trapezoid the steelframe of truss one of one montant of purlin piece 12, the steelframe of the truss one pass through purlin piece one
Top boom 10, the lower boom 13 of purlin piece one and middle longeron 6 connect and compose truss 1；Crossbeam in the same truss 22
8 and the montant 24 of purlin piece two it is coplanar after constitute L-shaped steelframe, the L-shaped steelframe passes through the top boom 20 of purlin piece two, the lower boom 23 of purlin piece two
And side longeron 5 connects and composes truss 22.
It is further used as preferred embodiment, positioned at the truss 1 and the two panels purlin piece one of the intersection of truss 22
14 top after connecting rod between truss is connected truss 1 truss 1 and truss 22 intersection into section into triangle
Shape, the section of remaining position is the open triangular section in upper end in truss 1.
In cross section, accompanying drawing 4, triangle or open trapezoid section are shown in the introversion of two panels purlin piece 1；Bridge floor 7
It is supported on crossbeam 8, crossbeam 8 is connected with the lower boom 13 of purlin piece one, and the force path of this section of load is：7 → crossbeam of bridge floor, 8 → purlin
13 → purlin of lower boom, the one 14 → substructure of piece of piece one.Girder point limb section（See accompanying drawing 3）, the semi-cantilever of crossbeam 8 is connected to purlin piece two
On 24, a L-shaped section is constituted.This section of crossbeam 8 is coplanar with the montant 22 of purlin piece two, constitutes a series of L-shaped steelframes not of uniform size,
These steelframes are then coupled together by the lower boom 23 of purlin piece two and side longeron 5, are collectively formed V-shaped in the bridge main beam of Y-shaped
Main couple point limb part.The force path of this section of load is：The lower boom 23 of 7 → crossbeam of bridge floor, 8 → purlin piece two and side longeron 5 →
Purlin 2 24 → substructure of piece.
It is further used as preferred embodiment, the plane included angle between side longeron 5 in truss 22 described in two panels is 50
~ 70 °, it is preferable that the plane included angle between side longeron 5 in two panels truss 22 is 60 °；The lower boom of the truss 1 and its phase
Plane included angle between the adjacent lower boom of truss 22 is 150 ~ 160 °, it is preferable that the lower boom of truss 1 truss adjacent with its
Plane included angle between 22 lower booms is 153 °.
It is further used as preferred embodiment, the lower boom 13 of the purlin piece one, the top boom 10 of purlin piece one, the lower edge of purlin piece two
The cross section of bar 23 and the top boom 20 of purlin piece two be parallelogram, the crossbeam 8, the montant 12 of purlin piece one, the brace 11 of purlin piece one,
The cross section of the montant 22 of purlin piece two and the brace 21 of purlin piece two is box section or H-shaped section.
Bridge-type structure system in the present invention can use two kinds of basic structure bodies of across a freely-supported trusses or two Span Continuous trusses
System.In addition when pier uses the structural system of two Span Continuous in setting, the brace 11 of purlin piece one and the brace 21 of purlin piece two are pull bar,
And then stayed structure can be made, and optimize Internal Force of Truss distribution by adjusting Suo Li, whole bridge further becomes truss-drawing
Rope combined system.These structural systems each have advantage and disadvantage, and typically considering construction costs, structure during specific design receives
The many factors such as power, under-clearance, Integrated comparative is determining optimum structure system.This motion trusses bar cross section type can be adopted
Use diversified forms.Except in view of good appearance, chord member is proposed with outside parallelogram section, other components can use case
The section of type, H types or other forms.Main beam member connected mode can be using all welded type, it would however also be possible to employ high-strength bolt is connected.
The structure of bridge floor 7 can use separate type Orthotropic Steel Bridge Deck, plate girder formula Orthotropic Steel Bridge Deck, the knot of steel-concrete composite beams
Configuration formula.During Specific construction, the condition such as can transport according to site traffic, be applied using full framing, pushing tow, cantilever lifting etc. are various
Work method is constructed.For Bridge Design, workmen provide diversified selection.
It is further used as preferred embodiment, the lower surface of the truss 1 and two panels truss 22 is separately installed with down
Portion's structure 3.
The following is currently preferred one embodiment：
The bridge is the bridge of the Zhong Shang islands road in a city, and its major function is to connect certain Binjiang Road and certain island.The bridge
Bridge type is the half through triangle steel truss simply supported girder bridge of Y shape point limb, and in city side, fork is two limbs, and span is 155m, purlin is high by 0 ~
18m, whole bridge plane is in " Y-shaped ", and bridge floor 7 lays bridge floor 7 using orthotropic plate, and design bridge floor 7 width is 7.8 ~ 15.6m
（Island Ce Liang tracks）, 4.4m（2 bicycle roads of city side）.Main truss uses " N-type " truss, truss to be uprised by 4 triangles
Purlin piece composition, wherein two panels purlin piece 1 and two panels purlin piece 2 24, truss panel length is 8.88m.Main couple point limb part
In the angle of two points of limbs be 60 °, main couple point limb part does not divide the angle of cut of limb part lower boom to be 153 ° with main couple.Triangle
Truss summit to two fulcrum span ratios be golden section proportion 1：0.618.
The top boom 10 of purlin piece one, the top boom 20 of purlin piece two, the lower boom 13 of purlin piece one, the lower boom 23 of purlin piece two, purlin piece one are erected
Bar 12, the montant 22 of purlin piece two, the brace 11 of purlin piece one, the brace 21 of purlin piece two and the component of side longeron 5 use box section；Flat vertical connection
4th, middle longeron 6 and crossbeam 8 use H type sections.Chord member uses Q500qENH steel, and the top boom 10 of purlin piece one and purlin piece two wind up
Rod member 1910mm high, the 1207mm wide of bar 20, are box beam parallelogram section；Section brace angle and purlin piece introversion angle one
Cause, be 68.3 °, 36 ~ 54mm of thickness of slab.The rod member 2047mm high of the lower boom 13 of purlin piece one and the lower boom 23 of purlin piece two, it is wide
1225mm, is box beam parallelogram section；28 ~ 50mm of chord member thickness of slab.Bridge welds node entirely using monoblock type, i.e., every section it is upper,
Lower boom is a prefabricated node, and the lower boom 13 of purlin piece one and the lower boom 23 of purlin piece two are per segment length 8875mm, the top boom of purlin piece one
10 per segment length 8892mm, and the top boom 20 of purlin piece two is per segment length 8912mm.The montant 12 of purlin piece one and the montant 22 of purlin piece two are used
Q420qE steel, box section, 1138mm high, 666mm wide, thickness of slab 18mm, montant length 3590mm ~ 16966mm.Purlin piece one is oblique
Bar 11 and two brace of purlin piece 21 use Q420qE steel, box section, 1138mm high, 450mm wide, thickness of slab 18mm, brace length
10350mm~19959mm.The use Q420qE steel of side longeron 59, box section, 1599 ~ 1687mm high, 888mm wide, thickness of slab 16 ~
24mm, is designed by flexural member, per segmental length 8891mm.The compression plate of all box-type section rod members is respectively provided with motherboard etc.
Thick ribbed stiffener.Side longeron 5 is disposed between crossbeam 8 in truss 1, its section is H type sections, deck-molding 1471mm, the edge of a wing
600mm wide, thick 32mm.Crossbeam 8 is H type sections, and 1299 ~ 1617mm of deck-molding sets horizontal wall inscription by deck-molding change, and the edge of a wing is wide
800mm, thick 32mm.Longeron 6 and the node of two lower boom of purlin piece 23 in the flat vertical connection of connection 4, are arranged using N rows.4 sections of flat vertical connection are
The H types section of 500mm high, edge of a wing 650mm wide, thick 28mm.Flat vertical connection 4, middle longeron 6 and crossbeam 8 use Q370qE steel.Bridge
Face 7 uses orthotropic plate bridge deck, using U-shaped ribbed stiffener, Q370qE steel, bridge floor plate thickness 16mm.Deck paving is 5.5cm
Bituminous epoxy concrete.
Bridge pier is the board-like pier of thin-walled, using rectangular cross section.Single pile foundation, using brill（Punching）Hole pouring pile, stake footpath is
1.2m.Cushion cap is four pile framings and eight pile framings.Different according to stake footpath, the thickness of cushion cap is different therewith, and stake footpath is 120cm cushion caps
Thickness be 1.6m, stake footpath for 180cm cushion caps thickness be 2.4m.Pile foundation uses cast-in-situ bored pile or Punching Borehole Cast-in-place Concrete Pile, diameter
There is two kinds of 120 and 180cm, bearing capacity of single pile is respectively 4500kN, 11000kN.Average stake is about 40m.
Specific implementation step is as follows：
（1）The substructure 3 for completing girder using inserting piling steel pile casting erection construction platform is constructed.
（2）Truss prefabrication part-structure is transported to live interim platform for lining, prefabricated section of Site Welding is carried out.
（3）Bridge floor sets up crane walking passageway, and bridge steel structure is walked with crane and installed from a lateral opposite side order, together
When set up temporary support in river course, temporary support synchronously sets up with bridge steel structure installation progress.
（4）Complete main couple to install, Site Welding Orthotropic Steel Bridge Deck.
（5）Laying deck paving, installs affiliated facility.
Above is better embodiment of the invention is illustrated, but the invention is not limited to the reality
Apply example, those of ordinary skill in the art can also make a variety of equivalent modifications or replace on the premise of without prejudice to spirit of the invention
Change, these equivalent modifications or replacement are all contained in the application claim limited range.
Claims (7)
1. a kind of Y shape divides the triangle steel truss bridge of limb, it is characterised in that：It is peaceful by crossbeam by two panels purlin piece one including one
The vertical cross section that is spliced to form is the truss one of triangle or open trapezoid and two respectively by purlin piece two, crossbeam, flat vertical connection
It is the truss two of L-shaped with cross section is formed after the splicing of side longeron, one end of the truss one and two truss two are constituted after crossing
Bridge main beam, truss one and two summits of the intersection of the truss two are the purlin highest point high of bridge main beam, the bridge
Beam girder is in integrally spatially a tripod, and bridge main beam plane is in Y-shaped, and two truss two are spliced into Y-shaped
Bridge main beam in V-shaped main couple point limb part.
2. Y shape according to claim 1 divides the triangle steel truss bridge of limb, it is characterised in that：The purlin piece one includes purlin
The top boom of piece one and the lower boom of purlin piece one, are disposed with the montant of purlin piece one between the top boom of purlin piece one and the lower boom of purlin piece one
With the brace of purlin piece one, between the lower boom of two panels purlin piece one, the purlin piece two is wrapped the vertical connection of crossbeam peace in the truss one
The top boom of purlin piece two and the lower boom of purlin piece two are included, purlin piece two is disposed between the top boom of purlin piece two and the lower boom of purlin piece two
Montant and the brace of purlin piece two, the vertical connection of crossbeam peace in the truss two are located between side longeron and the lower boom of purlin piece two, respectively
The V-shaped inner space being distributed between two panels truss two of side longeron in two panels truss two, the upper surface of the crossbeam
Bridge floor is equipped with, the lower boom of purlin piece two lower boom of purlin piece one docking adjacent thereto, the top boom of purlin piece two is adjacent with it
The near top boom of purlin piece one docking.
3. Y shape according to claim 2 divides the triangle steel truss bridge of limb, it is characterised in that：In the truss one
Crossbeam respectively with two panels purlin piece one in coplanar rear triangle or open trapezoid the steelframe of truss one of the montant of purlin piece one, institute
State the steelframe of truss one and truss one is connected and composed by the top boom of purlin piece one, the lower boom of purlin piece one and middle longeron；Positioned at same institute
The coplanar rear composition L-shaped steelframe of crossbeam and the montant of purlin piece two in truss two is stated, the L-shaped steelframe passes through the top boom of purlin piece two, purlin
The lower boom of piece two and side longeron connect and compose truss two.
4. the Y shape according to Claims 2 or 3 divides the triangle steel truss bridge of limb, it is characterised in that：Positioned at the truss one
Top with the two panels purlin piece one of the intersection of truss two is connected by connecting rod between truss.
5. Y shape according to claim 1 and 2 divides the triangle steel truss bridge of limb, it is characterised in that：Truss two described in two panels
In side longeron between plane included angle be 50 ~ 70 °, between the lower boom of the truss one and its lower boom of adjacent truss two
Plane included angle is 150 ~ 160 °.
6. Y shape according to claim 2 divides the triangle steel truss bridge of limb, it is characterised in that：The lower boom of purlin piece one,
The cross section of the top boom of purlin piece one, the lower boom of purlin piece two and the top boom of purlin piece two is parallelogram, and the crossbeam, purlin piece one are erected
The cross section of bar, the brace of purlin piece one, the montant of purlin piece two and the brace of purlin piece two is box section or H-shaped section.
7. Y shape according to claim 1 divides the triangle steel truss bridge of limb, it is characterised in that：The truss one and two panels
The lower surface of truss two is separately installed with substructure.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610210386.8A CN105755945B (en) | 2016-04-06 | 2016-04-06 | A kind of triangle steel truss bridge of Y shape point limb |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610210386.8A CN105755945B (en) | 2016-04-06 | 2016-04-06 | A kind of triangle steel truss bridge of Y shape point limb |
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| CN105755945B true CN105755945B (en) | 2017-06-13 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106988224B (en) * | 2017-05-17 | 2019-01-29 | 广州市市政工程机械施工有限公司 | The arch rib installation system and installation method of bridge |
| CN110184890B (en) * | 2019-06-28 | 2024-03-19 | 同济大学建筑设计研究院(集团)有限公司 | Bridge span structure |
| CN113481825B (en) * | 2021-07-21 | 2023-02-28 | 上海市政工程设计研究总院（集团）有限公司 | Large-span bridge structure of Y-shaped girder |
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| CN201406628Y (en) * | 2009-05-11 | 2010-02-17 | 天津市市政工程设计研究院 | Large-scale spoke cable type ferris wheel bridge |
| CN102251626A (en) * | 2011-04-20 | 2011-11-23 | 林娟 | Plate implanted body node aluminum alloy space truss structure |
| JP2014148880A (en) * | 2013-02-04 | 2014-08-21 | Institute Of National Colleges Of Technology Japan | Truss structure |
| CN203795295U (en) * | 2014-04-02 | 2014-08-27 | 中交第二航务工程勘察设计院有限公司 | Steel bridge with through triangular truss and external cable passage |
| CN204059756U (en) * | 2014-07-29 | 2014-12-31 | 中交一公局第四工程有限公司 | The truss of a kind of pre-stressed steel pipe concrete purlin sheet and structure thereof |
| CN205636467U (en) * | 2016-04-06 | 2016-10-12 | 广州市市政工程设计研究总院 | Triangle -shaped steel truss bridge of limb is divided to Y shape |
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