CN106436549B - A kind of long-life high intensity bridge floor steel box-girder and its assemble method - Google Patents
A kind of long-life high intensity bridge floor steel box-girder and its assemble method Download PDFInfo
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- CN106436549B CN106436549B CN201610833919.8A CN201610833919A CN106436549B CN 106436549 B CN106436549 B CN 106436549B CN 201610833919 A CN201610833919 A CN 201610833919A CN 106436549 B CN106436549 B CN 106436549B
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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
- E01D21/00—Methods or apparatus specially adapted for erecting or assembling bridges
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Abstract
The present invention, which provides a kind of long-life high intensity bridge floor steel box-girder and its assemble method, the bridge floor steel box-girder, to be included：Some bottom board units, are spliced to form by some bottom plates；Some lower ribs, are buckled in bottom board unit；Midfield Slab element, is connected by some median ventral plates and is formed；Some anchor casees, are arranged at midfield Slab element, including accommodating cavity, and accommodating cavity includes support baseboard, opens installation through-hole and limiting plate；Some groups of laggings, are arranged on the Slab element of midfield；Some coxostermums, are arranged at midfield Slab element both sides；Some groups of diaphragm plates, are arranged at the median ventral plate both sides；Both sides web, is arranged at bottom board unit length direction both ends；Some top plate units, are covered on the web of both sides；Some upper ribs, are buckled in the top plate unit inner surface.The bridge floor steel box-girder is easy to assembly, and structure composition intensity is high, and load-bearing capacity is strong, and service life length, easy to maintenance and repair, reduces production cost, lift economic benefit.
Description
Technical field
The present invention relates to a kind of long-life high intensity bridge floor steel box-girder and its assemble method.
Background technology
Steel box-girder, is called ntitorque steel plate box-girder, is the common structure type of Large Span Bridges.It is commonly used in the larger bridge of span
Liang Shang.External form is as a chest therefore is called steel box-girder.
Steel box-girder generally passes through all-welded mode by top plate, bottom plate, web and diaphragm plate, midfeather and ribbed stiffener etc.
It is formed by connecting.Wherein top plate is the cross bridge floor board being made of cover board and longitudinal stiffener.
Ntitorque steel plate box-girder be in engineering frequently with structure type be research tabula plate spacing to simple under Concentrated load
The influence of branch steel box-girder distortion, by setting the simply supported steel box girder of varying number diaphragm plate, compares it under Concentrated load
Distortion effect and rigid torsion effect, change curve of the maximum distortion effect with diaphragm plate quantity is obtained, on box girder web top
End apply load, by distortion, rigid torsion, four kinds of operating modes of symmetric curvature and eccentric load use load decomposition method into
Row calculates.
From the more Luo Qiao to Su-Tong Brideg, from Construction of Hangzhou Bay Cross-sea Bridge to Xihoumen Bridge, steel box-girder has obtained increasingly
It is widely applied.
At present, steel box-girder is that a kind of span ability is big, building height is small, the superior beam bridge pattern of overall performance, steel box-girder
Construction period is short, technical benefits is good, be adapted to apply on urban viaduct, it is also possible to onto bridge spanning the sea, above steel box-girder
Have a paving structure layer, paving structure layer is generally concrete layer, bitumen layer etc., but steel box girder bridge generally existing steel case floorings with
Paving structure layer bonds loosely, the situation such as easy glide delamination, crack.
For bridge floor steel box-girder, the current country is primarily present following patent document：
Chinese patent Authorization Notice No.：CN102322021B, discloses a kind of Longspan Bridge damping (shaking) and uses steel box-girder,
The steel box-girder makes full use of the mass block for being used for ballast in existing Longspan Bridge steel box-girder, is carried out repacking and is designed to reduce
The tuned mass damper (TMD) of steel box-girder vibratory response, to reduce the vibratory response of all kinds of excitation lower girders.Specific method is to press
Heavy gauge block is hung in the middle part of steel box-girder, is attached using spring between mass block and upper plate, lower plate, thus formed
Typical TMD dampings (are shaken) system.(shake) effect to strengthen damping at the same time, by mass block symmetricaerofoil dispersion in box beam center line
Both sides, the arm of force of controling power during increasing lateral bending and twisting vibration.Since mass block is designed to after TMD systems still have equally
Effect of loading, and TMD system designs are simple, low cost, and constantly newly-built with Longspan Bridge engineering, which uses
Steel box-girder bearing will have extensive future in engineering applications, produce significant economic and social benefits.However, the Patent design
TMD dampings (are shaken) system, and a component of damping is carried out using spring, this is for the bridge of the long-term vehicle that passes through, spring
Elastic fatigue can influence damping effect, easily cause danger.
The content of the invention
It is above-mentioned to solve the problems, such as, it is an object of the invention to provide a kind of long-life high intensity bridge floor steel box-girder and
Its assemble method, the bridge floor steel box-girder is easy to assembly, and structure composition intensity is high, and load-bearing capacity is strong, service life length, easy to tie up
Shield and repairing, reduce production cost, lift economic benefit.
To reach above-mentioned purpose, the technical scheme is that：
A kind of long-life high intensity bridge floor steel box-girder, including：Bottom board unit, it is horizontal positioned, spliced successively by some bottom plates
Formed；Some lower ribs, cross sectional shape are U-shaped, T-shaped or trapezoidal, and institute is arranged on along the bottom board unit width interval fastener
State bottom board unit upper surface；Midfield Slab element, is a plate body, vertical to place, by some median ventral plates along the bottom board unit length
Direction is in turn connected to form, which is vertically arranged in the bottom board unit upper surface along bottom board unit length direction
Portion；Some anchor casees, are arranged at intervals on the Slab element of midfield along median ventral plate element length direction, and each anchor case is symmetrically set including two
Midfield Slab element two sides, accommodating cavity for housing anchor tube are placed in, two accommodating cavities include support baseboard, are opened in support respectively
The installation through-hole of backplate surface and the limiting plate for being arranged at support baseboard both ends；Some groups of laggings, one end is along midfield Slab element
Length direction is arranged at intervals on the midfield Slab element, and every group of lagging quantity is two, is symmetrically disposed on the median ventral plate
Both sides；Some coxostermums, its length direction are symmetrically disposed on the midfield Slab element both sides along the bottom board unit length direction,
Each coxostermum is connected with least one lagging positioned at median ventral plate homonymy respectively；Some groups of diaphragm plates, it is vertical to place, every group
Two pieces of diaphragm plates, are symmetrically disposed on the median ventral plate both sides, the bottom of along between every group of diaphragm plate along the bottom board unit width
Slab element length direction is intervally arranged, and every piece of diaphragm plate one end is connected with coxostermum or lagging；Both sides web, along bottom board unit
Length direction is vertically arranged at bottom board unit length direction both ends, the other end connection of median ventral plate opposite with diaphragm plate respectively；Top
Slab element, is spliced to form by some top plates, is covered on above the both sides web, a babinet is cooperatively formed with bottom board unit, is pushed up
The position that plate corresponds to anchor case accommodating cavity opens up the jack passed through for anchor tube, and jack is corresponding with the accommodating cavity installation through-hole；If
Rib on dry bar, cross sectional shape are U-shaped or trapezoidal, are arranged on along the top plate unit width interval fastener in the top plate unit
Surface.
Further, the lagging is vertically installed on median ventral plate, and bottom is equipped with matched with the lower rib outer rim
Recess.
In addition, the median ventral plate two sides is respectively equipped with stiffener；The lagging is equipped with stiffener junction on median ventral plate
With the matched embedding benefit recess of plate shape of putting more energy into；The stiffener include along median ventral plate length direction set sash plate and
The vertical stiffener set along median ventral plate width.
Separately have, described every upper rib and lower rib are sequentially connected shape by some sections of floors by screw and securing plate respectively
Into.
Again, per one anchor case of setting between two adjacent groups lagging.
Further more, the anchor case accommodating cavity is obliquely installed on median ventral plate, angle of inclination is corresponding with anchor tube angle of inclination.
And between the coxostermum and lagging be vertical connection, coxostermum width one end end is grown along coxostermum
Degree direction opens up groove.
In addition, positioned at the diaphragm plate of median ventral plate homonymy, in pairs, one group be connected with coxostermum, one group connect with two laggings
Connect；Diaphragm plate length direction is set along bottom board unit width, and bottom interval is offered to be engaged with the lower rib outer rim
Cavity；Every piece of diaphragm plate offers a discharge outlet respectively close to median ventral plate one end, on the diaphragm plate of median ventral plate homonymy
Discharge outlet communicates with each other to form a drainage channel.
Separately have, the central raised formation gradient of top plate unit length direction, protrusion angle is 30 °.
Meanwhile the present invention also provides a kind of assemble method of long-life high intensity bridge floor steel box-girder, include the following steps：
1) design assembled moulding bed, including a stent, be arranged at the slide of stent length direction both sides, be set up on slide
Portal frame and hoist cable；
2) some base plate pavings are spliced to form bottom board unit on stent, by some lower ribs along the bottom board unit
Width interval fastener is arranged on the bottom board unit upper surface；
3) some median ventral plates are in turn connected to form midfield Slab element, by lagging along between median ventral plate element length direction
Every, be symmetrically disposed on midfield Slab element two sides, between every two pieces of laggings of midfield Slab element homonymy set an anchor case,
After midfield Slab element is assembled integrally with lagging, the bottom board unit length direction formed along step 2) is vertically placed on bottom plate list
First middle part upper surface；
4) coxostermum is hung on assembled moulding bed to be positioned, each coxostermum respectively with positioned at median ventral plate homonymy at least
One lagging connection, position error ± 1mm；
5) diaphragm plate is hung on assembled moulding bed to be positioned, diaphragm plate is symmetrical arranged along the bottom board unit width
It is intervally arranged between the median ventral plate both sides, every group of diaphragm plate along bottom board unit length direction, every piece of diaphragm plate one end and side
Web or lagging connection, position error ± 1mm；
6) side web is hung on assembled moulding bed to be positioned, bottom plate is vertically arranged at respectively along bottom board unit length direction
Element length direction both ends, the other end connection of median ventral plate opposite with diaphragm plate；
7) assembling and welding for first carrying out middle top plate are taken in the assembling of top plate unit, then assemble both sides top plate, assembling top
Using the absolute altitude of steel box-girder box height control frock controlroof plate face during Slab element, and with spirit level monitoring box body highly,
Splice gap when top plate unit assembles and consider welding contracted quantity, the welding of longitudinal joint is carried out after top plate is completed two-by-two, and
The symmetrical two groups of welders in both sides carry out welding from case, top plate corresponds to anchor case accommodating cavity position open up passed through for anchor tube it is slotting
Hole, top plate unit width inner surface interval fastener set some upper ribs；
8) the assembled overall completion measurement for requiring to carry out beam section, including detection full-bridge integral linear and size requirement, each point
Longitudinal direction U rib pairing dimensional accuracies between section control size, port controlling size and segmentation, complete the assembling of the bridge floor steel box-girder.
The beneficial effects of the present invention are：
The bridge floor steel box-girder, bottom board unit and top plate unit are spliced to form by some bottom plates and some top plates respectively, dress
With simple, easy to maintenance and repair, replace；Bottom board unit, top plate unit, side web cooperatively form hollow box body, effectively lifting
Buffering effect；Bottom board unit and top plate unit set floor, lower floor respectively, and U-shaped, T-shaped or trapezium structure, further strengthens
Buffering effect；The cooperation of diaphragm plate, coxostermum, lagging and median ventral plate, forms the support to hollow box body, lifts intensity；It is horizontal
Partition plate sets discharge outlet, beneficial to steel box-girder draining；Top plate unit sets the gradient, and the effect of buffering is reached while speed limit.
Brief description of the drawings
Fig. 1 is a kind of structure diagram of high intensity bridge floor steel box-girder provided by the present invention.
Fig. 2 is the structure diagram of median ventral plate in a kind of high intensity bridge floor steel box-girder provided by the present invention.
Fig. 3 is the knot of assembled moulding bed used in a kind of high intensity bridge floor steel box girder assembling manufacturing process provided by the present invention
Structure schematic diagram.
Fig. 4 is the structure diagram of diaphragm plate in a kind of high intensity bridge floor steel box-girder provided by the present invention.
Fig. 5 is a kind of high intensity bridge floor steel box-girder midsole Slab element provided by the present invention and lower floor on assembled moulding bed
The structure diagram of assembling.
Fig. 6 is midfield Slab element in a kind of high intensity bridge floor steel box-girder provided by the present invention and lagging in bottom board unit
The structure diagram of over-assemble.
Fig. 7 is coxostermum and the structural representation of lagging assembling in a kind of high intensity bridge floor steel box-girder provided by the present invention
Figure.
Fig. 8 is the structural representation of diaphragm plate and side web assembling in a kind of high intensity bridge floor steel box-girder provided by the present invention
Figure.
Fig. 9 is the structure diagram that top plate unit assembles in a kind of high intensity bridge floor steel box-girder provided by the present invention.
Embodiment
Below by specific embodiment, the present invention is described further, but embodiment is not intended to limit the protection of the present invention
Scope.
Reference Fig. 1 ~ Fig. 9, a kind of high intensity bridge floor steel box-girder of the present invention, including：Some bottom board units 1, it is horizontal
Place, be spliced to form successively by some bottom plates 11；Some lower ribs 2, cross sectional shape is U-shaped, T-shaped or trapezoidal, along the bottom
1 width interval fastener of Slab element is arranged on 1 upper surface of bottom board unit；Midfield Slab element 3, is a plate body, vertical to place, by
Some median ventral plates 31 are in turn connected to form along 1 length direction of bottom board unit, and the midfield Slab element 3 is along 1 length of bottom board unit
Direction is vertically arranged at 1 upper surface middle part of bottom board unit；Some anchor casees 4, are arranged at intervals along 3 length direction of midfield Slab element
In on midfield Slab element 3, each anchor case 4 includes two and is symmetrically disposed on 3 two sides of midfield Slab element, appearance for housing anchor tube
Chamber 41 is put, two accommodating cavities 41 include support baseboard 411, the installation through-hole 412 for being opened in 411 surface of support baseboard and set respectively
Limiting plate 413 in 411 both ends of support baseboard；Some groups of laggings 5, one end are arranged at intervals along 3 length direction of midfield Slab element
In on the midfield Slab element 3, every group of 5 quantity of lagging is two, is symmetrically disposed on 31 both sides of median ventral plate；Some flanks
Plate 6, its length direction are symmetrically disposed on 3 both sides of midfield Slab element, each coxostermum along 1 length direction of bottom board unit
6 are connected with positioned at least one lagging 5 of 31 homonymy of median ventral plate respectively；Some groups of diaphragm plates 7, it is vertical to place, every group two pieces
Diaphragm plate, is symmetrically disposed on 31 both sides of median ventral plate, the bottom of along between every group of diaphragm plate 7 along 1 width of bottom board unit
1 length direction of Slab element is intervally arranged, and every piece of 7 one end of diaphragm plate is connected with coxostermum 6 or lagging 5；Both sides web 8, the bottom of along
1 length direction of Slab element is vertically arranged at 1 length direction both ends of bottom board unit respectively, another with respect to median ventral plate 31 with diaphragm plate 7
One end connects；Some top plate units 9, are spliced to form by some top plates 91, are covered on the both sides web 8, with bottom board unit 1
A babinet is cooperatively formed, the position that top plate 91 corresponds to 4 accommodating cavity 41 of anchor case opens up the jack 92 passed through for anchor tube 100, jack 92
It is corresponding with 41 installation through-hole 412 of accommodating cavity；Some upper ribs 10, cross sectional shape is U-shaped, T-shaped or trapezoidal, along described
9 width interval fastener of top plate unit is arranged on 9 inner surface of top plate unit.
Further, the lagging 5 is vertically installed on median ventral plate 31, and bottom is equipped with to match with lower 2 outer rim of rib
The recess of conjunction, strut rail plate surface are equipped with reinforcing plate（It is not shown）.
In addition, 31 two sides of median ventral plate is respectively equipped with stiffener 32；The lagging 5 connects with stiffener 32 on median ventral plate 31
Place is met to be equipped with and the matched embedding benefit recess of 32 shape of stiffener（It is not shown）；The stiffener 32 is included along 31 length of median ventral plate
The sash plate 321 that direction is set and the vertical stiffener 322 set along 31 width of median ventral plate.
Separately have, described every upper rib 10 and lower rib 2 pass through screw by some sections of floors respectively（It is not shown）And reinforcing
Plate（It is not shown）It is in turn connected to form.
Again, per one anchor case 4 of setting between two adjacent groups lagging 5.
Further more, 4 accommodating cavity 41 of anchor case is obliquely installed on median ventral plate 31, angle of inclination and 100 angle of inclination of anchor tube
It is corresponding.
And be vertical connection between the coxostermum 6 and lagging 5,6 width one end end of coxostermum is along coxostermum
6 length directions open up groove 61.
In addition, positioned at the diaphragm plate 7 of 3 homonymy of midfield Slab element, in pairs, one group be connected with coxostermum 6, one group with it is two horizontal
Baffle 5 connects；7 length direction of diaphragm plate is set along 1 width of bottom board unit, and bottom interval offers and the lower rib 2
The matched cavity 71 of outer rim.
Again, every piece of diaphragm plate 7 offers a discharge outlet 72 respectively close to 31 one end of median ventral plate, positioned at 31 homonymy of median ventral plate
Discharge outlet 72 on diaphragm plate 7 communicates with each other to form a drainage channel.
Further more, the central raised formation gradient of 9 length direction of top plate unit, protrusion angle is 30 °.
Referring to Fig. 1 ~ Fig. 9, the assemble method of high intensity bridge floor steel box-girder of the present invention is as follows：
1) design assembled moulding bed 200, including a stent 201, be arranged at 201 length direction both sides of stent slide 202,
The portal frame 203 and hoist cable 204 being set up on slide 202；
2) some bottom plates 11 are layed on stent 201, are spliced to form bottom board unit 1, by some lower ribs 2 along described
1 width interval fastener of bottom board unit is arranged on 1 upper surface of bottom board unit；
3) some median ventral plates 31 are in turn connected to form midfield Slab element 3, by lagging 5 along 3 length side of midfield Slab element
To being spaced, being symmetrically disposed on 3 two sides of midfield Slab element, set between every two pieces of laggings 5 of 31 unit homonymy of median ventral plate
One anchor case 4, after midfield Slab element 3 is assembled integrally with lagging 5,1 length direction of bottom board unit formed along step 2) erects
Directly it is positioned over 1 middle part upper surface of bottom board unit；
4) coxostermum 6 is hung on assembled moulding bed 200 to be positioned, each coxostermum 6 respectively with positioned at 31 homonymy of median ventral plate
At least one lagging 5 connect, position error ± 1mm；
5) diaphragm plate 7 is hung on assembled moulding bed 200 to be positioned, diaphragm plate 7 is along 1 width pair of bottom board unit
Title is arranged at 31 both sides of median ventral plate, is intervally arranged between every group of diaphragm plate 7 along 1 length direction of bottom board unit, every piece of tabula
7 one end of plate is connected with coxostermum 6 or lagging 5, position error ± 1mm；
6) side web 8 is hung on assembled moulding bed 200 to be positioned, is vertically arranged at respectively along 1 length direction of bottom board unit
1 length direction both ends of bottom board unit, are connected with the other end of the diaphragm plate 7 with respect to midfield Slab element 3；
7) assembling and welding for first carrying out middle top plate 91 are taken in the assembling of top plate unit 9, then assemble both sides top plate 91,
The absolute altitude of 91 plate face of frock controlroof is controlled using steel box-girder box height when assembling top plate unit 9, and is monitored with spirit level
Box height, splices gap and considers welding contracted quantity, top plate 91 is indulged after being completed two-by-two when top plate unit 9 assembles
The welding of seam, and the symmetrical two groups of welders in both sides carry out welding from case, the position that top plate 91 corresponds to 4 accommodating cavity 41 of anchor case is opened
If the jack 92 passed through for anchor tube 100,9 width inner surface interval fastener of top plate unit sets some upper ribs 10；
8) the assembled overall completion measurement for requiring to carry out beam section, including detection full-bridge integral linear and size requirement, each point
Longitudinal direction U rib pairing dimensional accuracies between section control size, port controlling size and segmentation, complete the assembling of the bridge floor steel box-girder.
Wherein, bridge floor steel box-girder overall length 500m, mainly by top plate（16th, 24,30, tetra- kinds of stock boards of 36mm）, bottom plate
（14th, 24,30,36, five kinds of stock boards of 42mm）, median ventral plate（30th, two kinds of stock boards of 36mm）, side web（16、24、30、
36mm）Diaphragm plate（12、30mm）, upper rib, lower rib（It is preferred that U-shaped rib）（6、8、10mm）, stiffener（10~14mm）Deng combination
Form.
Opening's edge width distributed 38 upper ribs under steel box-girder top plate unit（It is preferred that U-shaped rib）, shelves are opened at U-shaped rib center
Size is 600；Bottom board unit is suitable for reading to distributed 28 lower ribs in the width direction（It is preferred that U-shaped rib）, a grade size is opened at U-shaped rib center
For 800.
Steel box-girder arranges median ventral plate along bridge deck width direction, and both sides are respectively one of side web.Steel box-girder is along bridge floor length
Directional spreding 166 grades of diaphragm plates, diaphragm plate are opened grade size and are differed by 2.37 m ~ 3.5m, and level is also arranged on another diaphragm plate
Stiffener, vertical stiffener and manhole etc..
U-shaped rib is welded with bridge floor top, bottom plate using single groove.Full penetration is used between median ventral plate, side web and top, bottom plate
Connection.Stiffener uses fillet weld with longitudinal web, diaphragm plate.Diaphragm plate is connected with median ventral plate using full penetration.It is segmented bottom
U-shaped rib and stiffener are using embedding benefit section welding between plate.
Steel box-girder processing difficulties are：
A), steel box-girder standard fragment position is 3 casees+2 overhanging sections, and width is 39 meters, and it is 49 meters that bridge tower, which passes through width at box beam,.
Top, bottom plate need to be divided into the Slab element that polylith differs in size, the making precision of each Slab element in advance when making（Plate face it is smooth
Degree, U-shaped rib open grade size etc.）The quality of steel box-girder is directly affected, therefore, the precision that Slab element makes is this Engineering Control
One big emphasis.
B), due under top plate opening's edge width distributed 38 U-shaped ribs, grade size is opened as 600 in U-shaped rib center；Bottom plate
Suitable for reading to distributed 28 U-shaped ribs in the width direction, it is 800 that grade size is opened at U-shaped rib center, is ensureing each Slab element machining accuracy
Afterwards, also need to ensure the spliced overall precision of each Slab element（The integral smoothness of plate face, U-shaped rib open grade size etc.）, this is
The one big difficult point of this engineering.
C), monolithic diaphragm plate beam overall is 28m, is to be divided into three pieces, minimum widith 4.5m by two pieces of median ventral plates, maximum width
Spend for 12 m（Suitable for reading to distributed 19 U-lag mouths, lower mouth distributed 14 U-lag mouths）, be also provided with diaphragm plate it is vertical and
The stiffener of horizontal direction, diaphragm plate cutting precision and welding equipment after machining accuracy be this Engineering Control another disaster
Point.
D), for steel box-girder in processing and making process, the piece welding of top plate unit causes the deformation of babinet, how to control this
Deformation is another big emphasis that this engineering need to control.
E), the segmentation of bridge floor steel box-girder is connected with segmentation, and top, bottom plate are using welding, and longitudinal web is using welding, because segmentation is wide
Spend it is larger, height it is higher, between segmentation sectional dimension coincide and weld gap uniformity, be this engineering processing and making process
In the third-largest difficult point；
F), U ribs connect between the segmentation of bridge floor steel box-girder, are connected by screw bolts on top plate between U ribs and stiffener.U ribs on bottom plate
And stiffener is welded using embedding benefit section is made.It is small close up the installation of U ribs on Slab element and in close up the positioning of top plate unit
And the connection control accuracy of U rib bolts hole is the fourth-largest difficult point in this engineering processing and making process；In addition U ribs between top plate segmentation
The perforation precision in docking high-strength bolt hole is the 4th emphasis of this Engineering Control.
When steel box-girder manufactures, each segment Slab element is carried out in advance respectively（Top, bottom board unit, longitudinal web unit, diaphragm plate
Unit）It is small close up welding equipment, it is qualified after sectional close up welding equipment using just making during the wheel of the law time carries out on overall package moulding bed.
When steel box-girder makes, according to section form in combination with factors such as plate of material tolerance systems, top plate is divided into 9 tops
Slab element, width differ for 2700 ~ 3600mm；Bottom plate is divided into 9 Slab elements, width differs for 2700 ~ 3400mm.Longitudinal direction
Web is respectively a Slab element, amounts to 3；Every grade of diaphragm plate is divided into two pieces by longitudinal web, and every piece is a Slab element.
The control measure of steel box-girder processing difficulties and emphasis：
A, Slab element precision controlling
When Slab element makes, monolithic is unified using steel band, installs U-shaped rib, while is detected using model, each after qualified
Slab element carries out welding on Special reverse distortion weld moulding bed respectively, it is ensured that its precision.
B, the integral smoothness of bottom plate and U ribs open a grade size Control
In order to which effectively control U-shaped rib between bottom plate Slab element opens a grade size, in close up before can be by adjacent two boards unit
Splicing in advance（Put certain welding contracted quantity and angular deformation in advance, actual welding between jigsaw can be also grasped after several pieces to be welded
Contraction and angular deformation amount）, assembly is then carried out again（Longitudinal joint is placed by actual welding amount of contraction between each Slab element）, it is appropriate to rectify
Just, so as to control the flatness for opening grade size and plate face of bottom plate U-shaped rib.
C, the control of tabula Slab element precision
Cut, checked after cutting using special sample, stiffener using digital controlling plasma during diaphragm plate blanking
CO is used when being welded with diaphragm plate2Gas shield welding is equipped with low current, the welding method of small voltage carries out welding, effectively reduces welding and becomes
Shape, controls the quality of tabula Slab element.
D, the interface safeguard measure between the segmentation of bridge floor steel box-girder
a）, the manufacture of bridge floor steel box-girder when, using several segmentation integral assemblings together, assembling and welding use identical side
Method carries out, and in addition reserves one section in segmentation interface and does not weld, welding is carried out after segmentation group is to qualification, it is ensured that docked between segmentation
Concordantly.
b）, two segmentation interfaces one rectify and make, the other end places surplus and carries out with cutting, it is ensured that interface weld gap.
Steel box-girder median ventral plate two sides is provided with three sash plates, according to production order is closed up in steel box-girder, first
Bottom plate is laid with, median ventral plate is then installed, middle section diaphragm plate is installed afterwards.After median ventral plate positioning, installation middle part diaphragm plate list
When first, tabula Slab element need to be positioned from the top down, embedded U-shaped intercostal.Since three sash plates are deposited on median ventral plate
Lagging is being caused not install.Therefore, embedding benefit need to be made in the sash plate on lagging at fluting by being passed through on median ventral plate
Recess, embedding benefit recess length is 500mm（Centered on lagging, to each 250mm in both sides, its butting grooves uses ceramic substrate
Form, groove be opened in it is embedding benefit recess on, gap 6mm, it is embedding benefit recess on deduct）, with the installation of sharp lagging.
Long-life high intensity bridge floor steel box-girder of the present invention, bottom board unit and top plate unit respectively by some bottom plates and
Some top plates are spliced to form, and assembling is simple, easy to maintenance and repair, are replaced；Bottom board unit, top plate unit, side web coordinate shape
Into hollow box body, effective Promoting Layered Buffer effect；Bottom board unit and top plate unit set floor, lower floor respectively, it is U-shaped, T-shaped or
Trapezium structure, further strengthens buffering effect；The cooperation of diaphragm plate, coxostermum, lagging and median ventral plate, forms to hollow box body
Support, lifted intensity；Diaphragm plate sets discharge outlet, beneficial to steel box-girder draining；Top plate unit sets the gradient, while speed limit
Reach the effect of buffering.
It should be noted that the above embodiments are merely illustrative of the technical solutions of the present invention and it is unrestricted.Although with reference to compared with
The present invention is described in detail in good embodiment, it will be understood by those of ordinary skill in the art that, can be to the technology of invention
Scheme technical scheme is modified or replaced equivalently, without departing from the scope of technical solution of the present invention, it should all cover the power in the present invention
In sharp claimed range.
Claims (9)
- A kind of 1. long-life high intensity bridge floor steel box-girder, it is characterised in that including：Bottom board unit, it is horizontal positioned, it is spliced to form successively by some bottom plates；Some lower ribs, cross sectional shape are U-shaped, T-shaped or trapezoidal, are arranged on along the bottom board unit width interval fastener described Bottom board unit upper surface；Midfield Slab element, is a plate body, vertical to place, and shape is sequentially connected along the bottom board unit length direction by some median ventral plates Into the midfield Slab element is vertically arranged at the bottom board unit upper surface middle part along bottom board unit length direction；Some anchor casees, are arranged at intervals on the Slab element of midfield along median ventral plate element length direction, and each anchor case includes two symmetrically Midfield Slab element two sides, accommodating cavity for housing anchor tube are arranged at, two accommodating cavities include support baseboard, are opened in branch respectively Support the installation through-hole of backplate surface and be arranged at the limiting plate at support baseboard both ends；Some groups of laggings, one end are arranged at intervals on the midfield Slab element along median ventral plate element length direction, every group of strut rail Plate quantity is two, is symmetrically disposed on the median ventral plate both sides；Some coxostermums, its length direction are symmetrically disposed on the midfield Slab element both sides along the bottom board unit length direction, Each coxostermum is connected with least one lagging positioned at median ventral plate homonymy respectively；Some groups of diaphragm plates, vertical to place, every group of two pieces of diaphragm plates, are symmetrically disposed on described along the bottom board unit width Median ventral plate both sides, are intervally arranged along bottom board unit length direction between every group of diaphragm plate, every piece of diaphragm plate one end and coxostermum or Lagging connects；Both sides web, is vertically arranged at bottom board unit length direction both ends, with diaphragm plate phase respectively along bottom board unit length direction The other end of median ventral plate is connected；Top plate unit, is spliced to form by some top plates, is covered on above the both sides web, a case is cooperatively formed with bottom board unit Body, the position that top plate corresponds to anchor case accommodating cavity open up the jack passed through for anchor tube, and jack is opposite with the accommodating cavity installation through-hole Should；Some upper ribs, cross sectional shape is U-shaped or trapezoidal, and the top plate is arranged on along the top plate unit width interval fastener Unit inner surface；The assemble method of the long-life high intensity bridge floor steel box-girder includes the following steps：1) design assembled moulding bed, including a stent, be arranged at the slide of stent length direction both sides, the gantry being set up on slide Frame and hoist cable；2) some base plate pavings are spliced to form bottom board unit on stent, by some lower ribs along the bottom board unit width Direction interval fastener is arranged on the bottom board unit upper surface；3) some median ventral plates are in turn connected to form midfield Slab element, by lagging along median ventral plate element length direction interval, right Title is arranged at midfield Slab element two sides, and an anchor case, midfield are set between every two pieces of laggings of midfield Slab element homonymy After Slab element is assembled integrally with lagging, the bottom board unit length direction formed along step 2) is vertically placed in bottom board unit Portion upper surface；4) coxostermum is hung on assembled moulding bed to be positioned, each coxostermum respectively with least one horizontal stroke positioned at median ventral plate homonymy Baffle connects, position error ± 1mm；5) diaphragm plate is hung on assembled moulding bed to be positioned, diaphragm plate is symmetrically disposed on described along the bottom board unit width Median ventral plate both sides, are intervally arranged along bottom board unit length direction between every group of diaphragm plate, every piece of diaphragm plate one end and coxostermum or Lagging connects, position error ± 1mm；6) side web is hung on assembled moulding bed to be positioned, bottom board unit length is vertically arranged at respectively along bottom board unit length direction Spend direction both ends, the other end connection of median ventral plate opposite with diaphragm plate；7) assembling and welding for first carrying out middle top plate are taken in the assembling of top plate unit, then assemble both sides top plate, assemble top plate list Using the absolute altitude of steel box-girder box height control frock controlroof plate face when first, and with spirit level monitoring box body highly, top plate Splice gap when unit assembles and consider welding contracted quantity, the i.e. welding of progress longitudinal joint, and from case after top plate is completed two-by-two The middle symmetrical two groups of welders in both sides carry out welding, and the position that top plate corresponds to anchor case accommodating cavity opens up the jack passed through for anchor tube, Top plate unit width inner surface interval fastener sets some upper ribs；8) the assembled overall completion measurement for requiring to carry out beam section, including detection full-bridge integral linear and size requirement, each segmentation control Longitudinal direction U rib pairing dimensional accuracies between size processed, port controlling size and segmentation, complete the assembling of the bridge floor steel box-girder.
- 2. a kind of long-life high intensity bridge floor steel box-girder according to claim 1, it is characterised in that the lagging is vertical It is arranged on median ventral plate, bottom is equipped with and the lower matched recess of rib outer rim.
- A kind of 3. long-life high intensity bridge floor steel box-girder according to claim 1, it is characterised in thatThe median ventral plate two sides is respectively equipped with stiffener；The lagging is equipped with and the matched embedding benefit recess of plate shape of putting more energy into stiffener junction on median ventral plate；The stiffener includes the sash plate set along median ventral plate length direction and is set along median ventral plate width perpendicular Straight stiffener.
- A kind of 4. long-life high intensity bridge floor steel box-girder according to claim 1, it is characterised in that described every upper rib It is in turn connected to form respectively by some sections of floors by screw and securing plate with lower rib.
- 5. a kind of long-life high intensity bridge floor steel box-girder according to claim 1, it is characterised in that per two adjacent groups strut rail One anchor case is set between plate.
- A kind of 6. long-life high intensity bridge floor steel box-girder according to claim 5, it is characterised in that the anchor case accommodating cavity It is obliquely installed on median ventral plate, angle of inclination is corresponding with anchor tube angle of inclination.
- 7. a kind of long-life high intensity bridge floor steel box-girder according to claim 1, it is characterised in that the coxostermum and horizontal stroke It is vertical connection between baffle, coxostermum width one end end opens up groove along coxostermum length direction.
- A kind of 8. long-life high intensity bridge floor steel box-girder according to claim 1, it is characterised in thatPositioned at the diaphragm plate of median ventral plate homonymy, in pairs, one group be connected with coxostermum, one group be connected with two laggings；Diaphragm plate length direction is set along bottom board unit width, and bottom interval is offered to be engaged with the lower rib outer rim Cavity；Every piece of diaphragm plate offers a discharge outlet respectively close to median ventral plate one end, the draining on the diaphragm plate of median ventral plate homonymy Mouth communicates with each other to form a drainage channel.
- A kind of 9. long-life high intensity bridge floor steel box-girder according to claim 1, it is characterised in that the top plate unit length The central raised formation gradient in direction is spent, protrusion angle is 30 °.
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| CN109208454B (en) * | 2018-10-19 | 2023-12-22 | 江苏京沪重工有限公司 | Inlaid segmented structure between steel bridge roof |
| CN109986308B (en) * | 2019-04-26 | 2020-07-28 | 江苏京沪重工有限公司 | Combined building process for U rib and T rib of steel box girder plate unit |
| CN111790995B (en) * | 2020-05-17 | 2022-01-07 | 北京市政建设集团有限责任公司 | Construction process for welding steel beam |
| CN111877168B (en) * | 2020-07-20 | 2021-10-01 | 长沙理工大学 | Torsion correction method for lattice type steel main beam of combined cable-stayed bridge |
| CN112372172B (en) * | 2020-11-27 | 2024-04-26 | 中铁宝桥集团有限公司 | Setting method of full-welded steel truss chord member block |
| CN112554072B (en) * | 2020-12-17 | 2022-09-30 | 中铁山桥集团有限公司 | Assembling method for steel box girder of self-anchored suspension bridge |
| CN113560829B (en) * | 2021-08-20 | 2023-05-16 | 江苏京沪重工有限公司 | Semi-arc small tie beam processing technology |
| CN115070354A (en) * | 2022-06-23 | 2022-09-20 | 中铁山桥集团有限公司 | Manufacturing method of main longitudinal beam with quadrilateral fold lines |
| CN114918588B (en) * | 2022-06-28 | 2023-09-26 | 浙江中南绿建科技集团有限公司 | Machining method of multi-cavity steel box girder |
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| CN101117791B (en) * | 2007-08-22 | 2010-12-08 | 中铁大桥局股份有限公司 | Abnormal shape steel case and orthotropic plate bottom formwork combined type moving die carrier framework and construction method thereof |
| CN102094385A (en) * | 2010-12-07 | 2011-06-15 | 中铁大桥勘测设计院有限公司 | Main girder of steel box composite girder with long cantilever arms for single-plane cable stayed bridge |
| KR101413058B1 (en) * | 2012-07-25 | 2014-06-30 | 삼성물산 주식회사 | Box girder |
| CN206070351U (en) * | 2016-09-20 | 2017-04-05 | 江苏京沪重工有限公司 | A kind of high intensity bridge floor steel box-girder |
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