CN104532730A - Full-breadth variable-cross-section steel box girder and construction method thereof - Google Patents
Full-breadth variable-cross-section steel box girder and construction method thereof Download PDFInfo
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- CN104532730A CN104532730A CN201410785538.8A CN201410785538A CN104532730A CN 104532730 A CN104532730 A CN 104532730A CN 201410785538 A CN201410785538 A CN 201410785538A CN 104532730 A CN104532730 A CN 104532730A
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- steel box
- girder
- view picture
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- section steel
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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
- 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
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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
- E01D19/00—Structural or constructional details of bridges
- E01D19/12—Grating or flooring for bridges; Fastening railway sleepers or tracks to bridges
- E01D19/125—Grating or flooring for bridges
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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
- E01D21/00—Methods or apparatus specially adapted for erecting or assembling bridges
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D2101/00—Material constitution of bridges
- E01D2101/30—Metal
Abstract
The invention discloses a full-breadth variable-cross-section continuous steel box girder. The steel box girder comprises a bridge floor top plate, a bottom plate and transverse partition plates, and is characterized in that the steel box girder is a full-breadth box girder, the top breadth of the steel box girder is 10 m-33.1 m, and the main span of the steel box girder is 120 m-200 m; the transverse partition plates are arranged between the bridge floor top plate and the bottom plate at the intervals of 8 m-10 m, and three transverse ribs are arranged between every two adjacent transverse partition plates. The breadth of the section of the full-breadth steel box girder reaches 33.1 m, and the main space of the full-breadth steel box girder reaches 150 m. According to the technology, hoisting of the full-breadth steel box girder can be completed just through three times of hoisting on the site, so that the construction efficiency of the site is greatly improved, the workload and construction risk of the site are reduced, the construction period of the site is shortened, and the building cost is lowered. Meanwhile, the full-breadth steel box girder brings great convenience to future maintenance after a brigade is built and lowers the operating cost.
Description
Technical field
The present invention relates to technical field of bridge engineering, relate more specifically to a kind of view picture variable cross-section steel box-girder and construction method thereof.
Background technology
China, since reform and opening-up, through the development of nearly 40 years, has become the country having numerous bridge in the world.Along with more and more higher to the requirement of bridge span ability, steel box-girder is from heavy and light, span ability is large, wind resistance is good, speed of application is fast, good endurance, can realize the Advanced Idea of " maximization, batch production, standardization, assembling " well, its many merits progressively be familiar with by people, in bridge spanning the sea, Steel Continuous Box beam system is used just more and more.
Steel Continuous Box beam, according to the needs of upper and lower part structural system coupling, can be designed as view picture or framing; According to the needs of span, can be designed as uniform section or variable cross-section.View picture, framing and uniform section, variable cross-section scheme according to design needs, can combine respectively.
Along with bridge construction is gradually to off-lying sea development, across footpath, manufacturing process, bonding strength etc., more and more higher requirement is all proposed for the breadth of section of steel box-girder, main span.Steel box-girder in the urgent need to more high-technology index meets the demand of bridge construction technique.
Summary of the invention
In view of this, one of main purpose of the present invention is to provide a kind of view picture variable cross-section steel box-girder, with the steel box girder providing Long span, heavy in section width, structural strength high, durable.
To achieve these goals, as one aspect of the present invention, the invention provides a kind of view picture variable cross-section steel box-girder, comprise bridge floor top board, base plate, diaphragm, inclined bottom plate etc., it is characterized in that:
Described steel box-girder is view picture steel box-girder, and its top width is 10 ~ 33.1 meters, and main span is 120 ~ 200 meters; And
Between described bridge floor top board and base plate, be provided with diaphragm, the spacing of described diaphragm is 8 ~ 10 meters, and arranges three road cross ribs between diaphragm described in every twice.
Wherein, described bridge floor top board adopts orthotropic steel bridge deck top board, and described bridge floor top board selects the thickness between 14 ~ 26mm according to technological requirement.
Wherein, described bridge floor top board is also provided with stiffening rib, described stiffening rib mainly adopts the U-shaped rib form of large rigidity, and local location adopts rib of slab stiffener modes according to detailing requiments.
Described base plate selects according to technological requirement the thickness of slab that 16mm, 18mm, 20mm, 22mm, 24mm, 28mm six kinds is different.
Also comprise inclined bottom plate in described steel box-girder, described inclined bottom plate selects 20mm, 24mm two type thickness of slab according to technological requirement.
Also comprise median ventral plate in described steel box-girder, described median ventral plate selects according to technological requirement the thickness of slab that 20mm, 22mm, 24mm, 26mm tetra-kinds is different.
Also comprise limit web in described steel box-girder, described limit web selects according to technological requirement the thickness of slab that 20mm, 22mm and 24mm tri-kinds is different.
Be provided with described diaphragm and cross rib correspondence position outside described steel box-girder and choose arm, described in choose arm web select 16,20mm two kinds of different-thickness.
As another aspect of the present invention, present invention also offers a kind of construction method of view picture variable cross-section steel box-girder, comprise the following steps:
Described steel box-girder is divided into some unit, manufactures described each unit respectively;
The described each plate unit manufactured is carried out assembly welding on assembling jig frame, obtains the girder steel of little sections;
Jig frame special carries out spelling to the little sections of the girder steel that above-mentioned assembly welding is good, forms large sections, obtain described view picture variable cross-section steel box-girder finished product.
Described construction method also comprises and the described view picture variable cross-section steel box-girder finished product made is transported to bridge location carries out assembled welding, obtains the step of complete bridge.
Known based on technique scheme, under the invention solves the larger main span demand of big cross section view picture steel box-girder, the structure of variable cross-section steel box-girder is arranged.View picture variable cross-section steel box-girder system provided by the invention, be provided with limit web, median ventral plate and choose arm, one diaphragm is set every 8 ~ 10 meters, three road cross rib plates are set between twice diaphragm, solve the structure difficult problem that view picture breadth of section reaches the broad width steel box beam bridge of 33.1 meters well; Meanwhile, main span can reach 150 meters.The main divided into three stages of view picture steel box-girder manufacture: Slab element manufacture, little sections make, large section assembling; Scene only needs to lift for three times, can complete the lifting work of full connection steel box-girder, compared with the steel box-girder of routine, greatly improve on-the-spot construction effect, reduce on-the-spot workload, construction period and construction risk, saved construction cost.Meanwhile, the maintenance after view picture case beam builds up for bridge from now on, provides a great convenience, reduces operation cost.Present invention improves the performance of big cross section view picture variable cross-section steel box-girder, can effective saving construction cost, promote deisgn product quality and class, achieve the Advanced Idea of " maximization, batch production, standardization, assembling " well.The present invention is that the enforcement of large sections view picture variable cross-section steel box-girder on broad marine site from now on provides good technical support, has directive function equally for framing, uniform section steel box-girder simultaneously.
Accompanying drawing explanation
Fig. 1 is that the positive facade of view picture variable cross-section steel box-girder of the present invention arranges schematic diagram;
Fig. 2 is the beam section ordinary construction schematic diagram of the present invention to view picture variable cross-section steel box-girder, and wherein upper figure is the ordinary construction of median ventral plate facade, and figure below is the ordinary construction of limit web facade;
Fig. 3 is the middle pier bearing sectional schematic diagram of view picture variable cross-section steel box-girder of the present invention;
Fig. 4 is the schematic diagram uprising the general section of beam section of view picture variable cross-section steel box-girder of the present invention;
Fig. 5 is the typical diaphragm sectional schematic diagram of view picture variable cross-section steel box-girder of the present invention, and wherein the left side is HG2 ~ HG4 diaphragm section, and the right is HG5 diaphragm section;
Fig. 6 is the typical cross rib plate sectional schematic diagram of view picture variable cross-section steel box-girder of the present invention, and wherein the left side is HL1 ~ HL5 cross rib section, and the right is HL6 ~ HL8 cross rib section;
Fig. 7 is U-shaped rib and the schematic diagram through diaphragm/cross rib Board position place fluting shape thereof;
Fig. 8 is the schematic diagram that U-shaped rib diaphragm/cross rib Board position place assembling requires.
Description of reference numerals:
1, variable cross-section steel box-girder, 2, top board, 3, base plate, 4, limit web, 5, median ventral plate, 6, inclined bottom plate, 7, choose arm.
Detailed description of the invention
For making the object, technical solutions and advantages of the present invention clearly understand, below in conjunction with specific embodiment, and with reference to accompanying drawing, the present invention is described in further detail.
See Fig. 1 ~ 8, the invention provides a kind of view picture variable cross-section steel box-girder 1, comprise orthotropic steel bridge deck top board 2, inclined bottom plate 6, base plate 3, median ventral plate 5, limit web 4, diaphragm, cross rib plate and choose arm 7 etc., wherein, steel box-girder 1 is view picture big cross section, its top width is 10 ~ 33.1 meters, maximumly can reach 33.1 meters, case beam both sides arrange and choose arm 7, main span is 120 ~ 200 meters across footpath, maximumly can reach 200 meters, be preferably 150 meters, end bay is 110 meters across footpath, as a preferred embodiment, three steel box-girder constitute the view picture Variable Section Steel case continuous beam system of a 110+150+110=370 rice, this system is longitudinally provided with limit web 4 along steel box-girder, median ventral plate 5, choose arm 7 at horizontally set and one diaphragm is set every 8 ~ 10 meters, three road cross rib plates are set between every twice diaphragm, thus solve the structure difficult problem that view picture breadth of section reaches the broad width steel box beam bridge of 33.1 meters well, simultaneously, due to the needs of girder span ability, main span reaches 200 meters, therefore, girder have employed variable section structure structure, middle Dun Dun pushes up 5 meters of section steel box-girder deck-moldings 6.5 meters, and each 37.5 meters of section deck-moldings in the jowar section both sides such as Dun Ding are changed to 4.5 meters from 6.5 linear meter, and all the other section deck-moldings are 4.5 meters.Above-mentioned deck-molding is the distance between case beam median ventral plate center top board upper limb and base plate upper limb.
Orthotropic steel bridge deck top board 2 can select rational top plate thickness according to concrete load numerical value and force part along bridge to different section, in the present invention adopt 14 ~ 26mm caliper zones between, the thickness that preferred 18mm, 22mm two kinds is different, 22mm is preferably across span centre beam section top plate thickness such as, end bay span centre beam section top plate thickness is preferably 18mm, middle pier pier back timber section top board thickness of slab is preferably 22mm, is preferably 22mm with navigation bridge adjacent edge across beam section top board thickness of slab.For ensureing that the pavement thickness on bridge floor top board meets designing requirement, and keep concordant, the bridge floor top board of each beam section different-thickness docks the form taking upper limb (outer rim) to align.The U-shaped rib form that bridge floor top board stiffening rib mainly adopts rigidity larger, local location adopts rib of slab stiffener modes according to detailing requiments.
When top board 2 thickness is 18mm, it is highly 300mm, wide 300mm suitable for reading that U rib is put more energy into, the wide 180mm of end opening; When top plate thickness is other numerical value, U-shaped stiffening rib keep root edge concordant, end opening is wide to remain unchanged, width suitable for reading with standard 300mm, height for 300mm is for benchmark, the corresponding extension with the corresponding increase of top plate thickness, shortening.U-shaped stiffening rib standard lateral spacing 600mm, thickness adopts 8mm.
Base plate 3 can select rational base plate thickness according to concrete load numerical value and force part to different section along bridge, between the caliper zones adopting 16 ~ 28mm in the present invention, and the thickness of slab that preferred 16mm, 18mm, 20mm, 22mm, 24mm, 28mm six kinds is different.As a preferred embodiment, in be preferably 22mm across span centre five beam section base plate thickness, its both sides transit to 18mm, end bay span centre beam section base plate thickness is preferably 16mm, middle pier pier back timber section base plate thickness of slab is preferably 28mm, its beam sections at two sides transits to 24mm, 20mm, 18mm, and base plate and stiffening rib steel material adopt Q420qD within the scope of span centre 39m, and all the other are Q345qD.For ease of the processing of bottom plate reinforcing rib and the connection of the intersegmental stiffening rib of beam, base plate upper limb (inner edge) keeps concordant.Base plate adopts rib of slab to put more energy into, and normal pitch 600mm, stiffening rib thickness, according to the difference of its bearing plate thickness, matches, and changes between 16 ~ 28mm.
Inclined bottom plate 6 adopts between the caliper zones of 18 ~ 24mm, preferred 20mm, 24mm two type thickness of slab.As a preferred embodiment, middle Dun Dun pushes up three beam section inclined bottom plate 6 thickness and is preferably 24mm, and all the other beam section inclined bottom plate 6 thicknesss of slab are preferably 20mm.Inclined bottom plate 6 and stiffening rib steel material adopt Q420qD within the scope of span centre 39m, and all the other are Q345qD.For ease of the processing of inclined bottom plate stiffening rib and the connection of the intersegmental stiffening rib of beam, inclined bottom plate upper limb (inner edge) keeps concordant.
Median ventral plate 5 is between the caliper zones adopting 18 ~ 26mm along bridge to different section, and the thickness of slab that preferred 20mm, 22mm, 24mm, 26mm tetra-kinds is different, the Centered form of plate is taked in the median ventral plate docking of each beam section different-thickness.Median ventral plate 5 adopts rib of slab to put more energy into, and stiffening rib thickness of slab is corresponding with median ventral plate thickness of slab, is respectively 20mm, 22mm, 24mm, 26mm.Near pier top, five beam sections are welded with transverse stiffener near the longitudinal stiffener of base plate, and all the other position longitudinal stiffeners disconnect at diaphragm and cross rib plate place.Median ventral plate 5 and stiffening rib steel material adopt Q420qD within the scope of span centre 39m, and all the other are Q345qD.
Limit web 4 is between the caliper zones adopting 18 ~ 24mm along bridge to different section, and the thickness of slab that preferred 20mm, 22mm and 24mm tri-kinds is different, limit web 4 inner edge is concordant.Limit web 4 adopts rib of slab to put more energy into, and stiffening rib thickness of slab corresponding sides web 4 thickness of slab is respectively 20mm, 22mm and 24mm.Limit web and stiffening rib steel material adopt Q420qD within the scope of span centre 39m, and all the other are Q345qD.
Diaphragm normal pitch 8 ~ 10 meters, preferably arranges three road cross ribs by preferably 10 meters between twice diaphragm.Diaphragm is divided into common diaphragm, main pier bearing place diaphragm, transition pier bearing place's diaphragm and end diaphragm.The deck-molding section thicknesss of slab such as common diaphragm are 12mm, and variable cross-section section thickness of slab is 16mm; A main pier bearing place diaphragm is divided into twice, and thickness of slab is 26mm; Connecting boat transition pier bearing place, bridge side diaphragm is that thickness of slab is 24mm together, and connecing transition pier bearing place, non-navigable side diaphragm is that thickness of slab is 20mm together; End diaphragm thickness of slab is 16mm, and material is Q345qD.
Cross rib plate is uniform 3 roads between twice diaphragm, i.e. spacing 2.5m.Cross rib plate is 16mm at top board place (thickening to 28mm at the top board cross rib with navigation bridge joint), median ventral plate place, web place, limit, inclined bottom plate place thickness of slab, flange width except beam-ends shrinkage joint place be except 160mm, more than be 300mm.Cross rib plate is except 24mm at base plate place thickness of slab except corner near beam-ends place subplate bearer adds strength, more than be 16mm, the edge of a wing corresponds to 300 × 24,300 × 16mm, and the height of cross rib at base plate place is 1050 ~ 750mm in variable cross-section section, is 750mm etc. deck-molding section.The vertical stiffening rib thickness of slab of cross rib plate is 10mm, and material is Q345qD.
All arrange with diaphragm and cross rib correspondence position outside case beam and choose arm 7, choose the endplate place thickness of slab that arm 7 web is connecting with non-navigation bridge and be preferably 20mm, be preferably 20mm at the end diaphragm connected with navigation bridge, bearing diaphragm place thickness of slab, all the other positions are all preferably 16mm.Edge of a wing thickness is preferably the 24mm of end diaphragm place 28mm and all the other positions respectively.Vertical stiffening rib thickness of slab is 16mm at the end diaphragm connected with navigation bridge, bearing diaphragm place, and all the other positions are 10mm.
As shown in Fig. 1 ~ 8, view picture variable cross-section steel box-girder 1 of the present invention comprises orthotropic steel bridge deck top board 2, inclined bottom plate 6, base plate 3, median ventral plate 5, limit web 4, diaphragm, cross rib plate and chooses the structure members such as arm 7, its manufacture and assembled operation as follows:
The main divided into three stages of steel box-girder manufacture: Slab element manufacture, little sections make, large section assembling.Above three phases all can manufacture in factory building, assembled.Overall craft flow process is as follows:
Steel plate pretreatment → blanking → U rib making → Slab element makes → and little sections assembling and assembled → little sections rust cleaning in advance, application → large section assembling → coating dress → large sections store, shipment, transport → bridge connects.
Concrete processing step is:
First steel box-girder is divided into some Slab element, comprises top plate unit, bottom board unit, inclined bottom plate unit, median ventral plate, limit web unit, separator unit, semi girder unit etc.On assembling jig frame, carry out the assembling of trifle section girder steel, welding, assembled in advance after Slab element manufacture completes, after be transported in application factory building carry out eliminating rust, application.Jig frame special carries out the assembled of large sections, and coating fills.After large sections manufacture completes, adopt crane barge by the lifting of beam section on cargo ship, transport safely after colligation is fixing to bridge location and install.
For reducing Site Welding workload, accelerating construction progress, steel box beam erection adopts large segment lifting scheme.According to domestic existing processing, transport capacity, hanging device situation, large beam sections section splitting scheme and constructure scheme as follows:
Steel box-girder is divided into 3 beam sections, end bay beam segment length 152.6m, lifting weight be about 3200t, in across beam segment length 64m, lifting weight be about 1350t.With regard to hoisting weight, domestic large-scale floating crane can meet construction requirement.Do not need in program erection process to arrange Temporary Piers.
Scheme of architecture sequence of construction is:
Crane barge lifting the 1st is across beam section;
Crane barge lifting the 3rd is across beam section;
Crane barge lifting the 2nd, across beam section, is adjusted to design altitude, is connected the 2nd across with the 1st, 3 across beam section, and full-bridge joins the two sections of a bridge, etc.
During large sections steel box-girder lifting, end bay large sections steel box-girder is supported on two main piers, the two ends of Middle span closing sections are all supported on (support that namely beam is intersegmental) in beam section in place, that is: bracket is set on beam segment interface top board to be installed, at beam segment interface top board place in place, temporary support is set, during lifting, bracket is overlapped on temporary support, plays support and fine adjustment effect.
In sum, the present invention is applicable to steel case continuous girder bridge, especially big cross section view picture variable cross-section bridge, and under solving the larger main span demand of big cross section view picture steel box-girder, the structure of variable cross-section steel box-girder is arranged.Meanwhile, the present invention has directive significance equally for framing Variable Section Steel case continuous beam.
Above-described specific embodiment; object of the present invention, technical scheme and beneficial effect are further described; be understood that; the foregoing is only specific embodiments of the invention; be not limited to the present invention; within the spirit and principles in the present invention all, any amendment made, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. a view picture variable cross-section steel box-girder, comprises bridge floor top board, base plate, diaphragm, it is characterized in that:
Described steel box-girder is view picture steel box-girder, and its top width is 10 ~ 33.1 meters, and main span is 120 ~ 200 meters; And
Between described bridge floor top board and base plate, be provided with diaphragm, the spacing of described diaphragm is 8 ~ 10 meters, and arranges three road cross ribs between diaphragm described in every twice.
2. view picture variable cross-section steel box-girder according to claim 1, is characterized in that, described bridge floor top board adopts orthotropic steel bridge deck top board, and described bridge floor top board selects the thickness between 14 ~ 26mm according to technological requirement.
3. view picture variable cross-section steel box-girder according to claim 1, is characterized in that, described bridge floor top board is also provided with stiffening rib, and described stiffening rib mainly adopts the U-shaped rib form of large rigidity, and local location adopts rib of slab stiffener modes according to detailing requiments.
4. view picture variable cross-section steel box-girder according to claim 1, is characterized in that, described base plate selects according to technological requirement the thickness of slab that 16mm, 18mm, 20mm, 22mm, 24mm, 28mm six kinds is different.
5. view picture variable cross-section steel box-girder according to claim 1, is characterized in that, also comprise inclined bottom plate in described steel box-girder, and described inclined bottom plate selects 20mm, 24mm two type thickness of slab according to technological requirement.
6. view picture variable cross-section steel box-girder according to claim 1, is characterized in that, also comprise median ventral plate in described steel box-girder, and described median ventral plate selects according to technological requirement the thickness of slab that 20mm, 22mm, 24mm, 26mm tetra-kinds is different.
7. view picture variable cross-section steel box-girder according to claim 1, is characterized in that, also comprise limit web in described steel box-girder, and described limit web selects according to technological requirement the thickness of slab that 20mm, 22mm and 24mm tri-kinds is different.
8. view picture variable cross-section steel box-girder according to claim 1, is characterized in that, is provided with chooses arm outside described steel box-girder with described diaphragm and cross rib correspondence position, described in choose arm web select 16,20mm two kinds of different-thickness.
9. a construction method for view picture variable cross-section steel box-girder, comprises the following steps:
Described steel box-girder is divided into some unit, manufactures described each unit respectively;
The described each unit manufactured is carried out assembly welding on assembling jig frame, obtains the girder steel of little sections;
Girder steel good to above-mentioned assembly welding on jig frame special carries out the assembled of large sections, obtains described view picture variable cross-section steel box-girder finished product.
10. the construction method of view picture variable cross-section steel box-girder according to claim 9, also comprises and the described view picture variable cross-section steel box-girder finished product made is transported to bridge location carries out assembled welding, obtain the step of complete bridge.
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| CN106677074A (en) * | 2017-02-23 | 2017-05-17 | 河南省交通规划设计研究院股份有限公司 | Prefabricated combined corrugated steel web T girder bridge |
| CN106677074B (en) * | 2017-02-23 | 2018-07-27 | 河南省交通规划设计研究院股份有限公司 | Prefabricated assembled Wavelike steel webplate T beam bridges |
| CN107142833A (en) * | 2017-05-23 | 2017-09-08 | 中建钢构有限公司 | A kind of segmented large span steel beam and its welding method |
| CN108526741A (en) * | 2018-04-19 | 2018-09-14 | 中铁宝桥集团有限公司 | A kind of welding structure and its welding method of steel bridge Beam Plate Elements ribbed stiffener end |
| CN115476066A (en) * | 2022-10-08 | 2022-12-16 | 江苏京沪重工有限公司 | Positive and negative manufacturing process of assembled and superposed twin-tire approach bridge steel box girder |
| CN115476066B (en) * | 2022-10-08 | 2024-02-20 | 江苏京沪重工有限公司 | Forward and reverse manufacturing process of assembled and stacked twin-type approach bridge steel box girder |
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Application publication date: 20150422 |