CN107100065A - A kind of compound section steel box girder and its method of construction for high-speed railway - Google Patents
A kind of compound section steel box girder and its method of construction for high-speed railway Download PDFInfo
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- CN107100065A CN107100065A CN201610093184.XA CN201610093184A CN107100065A CN 107100065 A CN107100065 A CN 107100065A CN 201610093184 A CN201610093184 A CN 201610093184A CN 107100065 A CN107100065 A CN 107100065A
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- box girder
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Classifications
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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
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D2/00—Bridges characterised by the cross-section of their bearing spanning structure
- E01D2/04—Bridges characterised by the cross-section of their bearing spanning structure of the box-girder type
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D21/00—Methods or apparatus specially adapted for erecting or assembling bridges
-
- 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 kind of compound section steel box girder and its method of construction for high-speed railway, belong to high-speed railway bridge field.There is shear connector on the top flange plate of steel case in the compound section steel box girder, the concrete slab of top and top flange plate are linked together.Meanwhile, steel sole plate is harmonious with prefabricated prestressed concrete plate, collectively as the bottom plate of the compound section steel box girder, common stress.Concrete slab on top flange plate can be cast-in-place, also can be prefabricated.Because prestressed concrete plate three parts of the beam in steel case, concrete roof and steel case are constituted, can Assembling, transport and lifting operation when facilitating construction make it possible that the simply supported girder bridge of more large span is built in land.With at present compared with the view picture formula simply supported beam of across footpath, the compound section steel box girder that the invention is provided increases the section rigidity of steel box-girder, smaller beam body weight, can increase the across footpath of beam.The present invention is a kind of construction reasonable stress, and the bridge member form of easy construction, the Simple Supported Beam Bridge on High Speed Railways for land formation more large span provides technical support.
Description
Technical field
The present invention relates to a kind of compound section steel box girder and its method of construction for high-speed railway, belong to high-speed railway bridge neck
Domain.
Background technology
At present, in high-speed railway field, T section beam or box-girder are used simply supported girder bridge, the former is referred to as T more
Beam, the latter is referred to as box beam.Because the T beam bridge lateral stiffnesses that T beams are constituted are smaller, anti-twisting property is poor, and stability when installing
Poor, the field operation time is long, is used when being not suitable for compared with large span.Simply supported girder bridge compared with large span typically uses box beam.
Box beam includes concrete box girder, steel box-girder and compound section steel box girder.When span is larger, the weight of concrete box girder is very
Greatly, difficulty is brought to pouring or set up, such as 32 meters of high-speed railway integrated box girder weighs about 900 tons, and height is built on land
Fast railroad bridge should not use the concrete box girder of more large span.The rigidity of steel box-girder is relatively low, is not suitable for flatness
It is required that extremely strict high-speed railway field.Therefore, the simply supported girder bridge of more large span is considered as using combination steel in high-speed railway
Box beam.
Compound section steel box girder is combined by the steel case and the concrete slab on top flange plate of bottom, passes through shear connections
Part is connected.Make use of concrete anti-compression ability strong, and steel tensile capacity it is high the characteristics of, take full advantage of material property.Steel case
The anti-twisting property of beam is strong, and erection construction easily, is suitably applied highway and Urban Bridge.It is applied to high-speed railway bridge then still
There is shortcoming, be exactly that vertical rigidity still is apparent not enough.Main cause is that bottom parts only have steel plate, and thickness is typically small.Increase group
The thickness for closing steel box-girder steel plate of baseplate is a kind of strategy, but the more economical steel plate thickness that steel and iron industry is provided is not too large,
And thicker steel plate brings difficulty to construction and subsequent manufacture.Welding steps up rib on bottom plate, and rib spacing of putting more energy into is made by welding
The limitation of industry, and substantial amounts of welding increase manufacturing expense.Therefore welding ribbed stiffener is limited to improving stiffness, should be by coagulation
Soil material increases contribution of the box beam bottom plate to rigidity.
A kind of scheme is the direct casting concrete on the steel sole plate of compound section steel box girder, but the tensile capacity of concrete material
Relatively low, under working load effect, concrete will ftracture after tension.If after casting concrete, applying prestressing force to it, then
Because of the presence of steel sole plate, the prestressing force applied just only has partial action on concrete slab, and with concrete shrinkage, Xu
Prestressing force in the progress of change, concrete will be gradually reduced, and be a kind of inefficient method, and still may working load work
Cracking under.Another scheme is as the bottom plate of steel box-girder, internally concrete perfusion or mortar, and then using steel case
Apply prestressing force, this is a kind of good method, can meet engineer applied, but still have the following disadvantages：Prestressing force still has greatly
Partly " consume " on steel case, and the tensile capacity of steel case is strong, is not need the partial prestressing；Concrete in steel case
Or mortar still suffers from contraction, problem of creeping, internal prestressing force can be reduced in use；If being poured before erection in steel case
Concrete or mortar, will increase lifting weight；If the concrete or mortar in after-pouring bottom plate are installed in place in steel case, then
With post-stress, then construction speed is influenceed；Because the bottom plate of steel case is as the template of casting concrete or mortar, it is determined
Width can not possibly be larger, the need for a combination beam can not meet view picture bridge, can only use laterally with the assembly of many beams
Form, can thus make field operation complicated and increase the activity duration.Therefore, urgent need is a kind of efficient in high-speed railway bridge and can
The compound section steel box girder of rapid construction.
The content of the invention
It is an object of the invention to solve above-mentioned the deficiencies in the prior art and problem there is provided one kind to be used at a high speed
The compound section steel box girder and its method of construction of railway.The compound section steel box girder surface with general compound section steel box girder, including steel case,
Top flange plate, concrete roof, are connected between the latter two by being welded in the shear connector of top flange plate upper surface, its feature
It is：In the inside of steel case, steel sole plate is combined with prefabricated prestressed concrete plate, collectively as the bottom of compound section steel box girder
Plate.This programme can make full use of the high cohesive force, the tension higher than general concrete and anti-pressure ability of current structure glue.Tack coat
Prefabricated prestressed concrete plate is coupled integrally with lower steel case.Diaphragm plate can be set in steel case, and web ribbed stiffener,
And the vertical, horizontal ribbed stiffener of bottom wing listrium.
Further, the prestressed concrete plate in steel case is made using super high strength concrete.This is mainly consideration
Concrete to tensile region can be produced in larger stretching strain, prestressed concrete plate under working load effect should sufficiently large
Prestressing force deposit.In recent years, super high strength concrete develops into this and provides and support, prefabricated superelevation is mixed by force under general condition
Solidifying soil intensity approaches 200MPa, and uses the concrete of reactive powder making, and after appropriate steam curing, intensity exceedes
300MPa, close to the intensity of conventional steels.Meanwhile, the tensile strength of super high strength concrete is also accordingly improved.So, it is prefabricated
Prestressed concrete plate in can store more than 50MPa compressive pre-stress, consider further that the tensile strength itself having, in advance should
Power concrete slab is just configurable on the tensile region of beam.In view of in the high-speed railway bridge compared with large span, play control action is
Rigidity and non-intensity, the solution of the present invention is reasonable and feasible.
Destabilization problems are there may be in view of the web of steel case, its web can use corrugated steel web.Corrugated steel web is near
Have started to be applied in engineering fairly largely over year, its excellent force-transfer characteristic has obtained the accreditation of engineering circles.Using
After corrugated steel web, the manufacture of steel case becomes relatively easy, has saved cost.
It is pre- on the prestressed concrete plate in steel case for the connection of prestressed concrete plate and steel sole plate in enhancing steel case
Vertical hole is stayed, screw rod is welded in the plate upper surface relevant position of steel case, prestressed concrete plate passes through knot with steel sole plate
Structure glue, and fastening bolt are connected, and keep extruding closely connected.
The method that enhancing prestressed concrete plate is connected with steel sole plate, is that shearing is reserved when prestressed concrete plate is prefabricated
Groove, steel case plate upper surface is correspondingly welded with WELDING STUDS group.This is that conventional precast slab combines the normal of connection with girder steel
Use method.
In the case where bridge is wider, vertical baffle can be installed inside steel case, multiple horizontal skies will be divided into inside steel case
Between, prefabricated prestressed concrete plate is also laterally divided into polylith in steel case.
Method of construction in the present invention comprises the following steps：
(a) diaphragm plate in factory's manufacture steel case, including steel case（Diaphragm plate is reserved with enough installations with steel bottom plate and in advance should
The space of power armoured concrete slab）, the ribbed stiffener on the inside of steel case web, the longitudinal and transverse rib of top flange plate lower surface, and top flange
The shear connector of plate upper surface, in concrete prefabricated field, the prefabricated prestressed concrete plate that will be penetrated in steel case, prefabricated side
Method is pre-tensioning system, and is made using long line method, makes a production line can prefabricated multi-disc prestressed concrete plate, and corresponding simultaneously
The reserved shearing groove in position；
(b) concrete slab on concrete prefabricated field, prefabricated top flange plate, and reserved shearing groove；
(c) the corresponding steel case of same combination beam, concrete slab, prestressed concrete plate are transported to job site；
(d) after adjustment support position, steel case is installed, then the concrete slab on top flange plate is installed, is poured in shearing groove micro- swollen
Swollen concrete, slightly expanded concrete intensity is allowed for access next step after reaching the 85% of design strength；
(e) the thin steel branch backing plate of the structural adhesive layer equal thickness with designing is placed in steel case plate upper surface, and in shearing groove location
Surrounding places rubber washer, is slowly fallen after prestressed concrete plate is penetrated into steel case, adjustment position, is poured in shearing groove micro-
Expansive concrete, slightly expanded concrete intensity is allowed for access next step after reaching the 85% of design strength；
(f) gap between enclosed beam both ends of the surface prestressed concrete plate bottom plate and side, with steel case, and bottom peace at one end
Multiple slurry-feeding holes are filled, the side top of the other end installs multiple slurry outlets, gently from slurry-feeding hole pressure injection modified epoxy knot
Structure glue, until all slurry outlet pulps and bubble-free.
In view of pouring connection concrete in prestressed concrete slab, construction speed can be influenceed, can be applied to above-mentioned
Work method slightly modified, prestressed concrete plate is connected with structure glue and fastening bolt.In step (a), on steel bottom plate
The shear connector of welding is screw rod, correspondingly reserving hole, the connection fastening spiral shell in step (e) on prestressed concrete plate
Bolt, fixing bolt is tightened completing step (f) eventually afterwards.
If the bridge length across river or ditch is little, the concrete slab on top flange plate can be using the construction of cast-in-place method.This
It is not that very high highway bridge, Urban Bridge are feasible for construction period, the cost of concrete slab can be saved.
Precast prestressed concrete plate in the present invention in steel case can use individual plates, also can be many along the horizontal partition of beam
Individual narrow boards, does not influence structural behaviour.Also can be longitudinally split, it is contemplated that span centre part is subjected to larger moment of flexure, longitudinal direction is preferably right
Ground Split is called three sections.
Weathering steel can be used in order to reduce the steel in the maintenance cost during use, the present invention.
Compared with prior art, the invention has the advantages that：
（1）The section bending resistance of compound section steel box girder is increased, the bending rigidity of bridge is improved；
（2）Compound section steel box girder branch point manufacture, transports in-site installation, is readily transported；
（3）Using field-installed method, it is easy to lifting operation；
（4）Applied to high-speed railway bridge, the span of simply supported beam can be increased；
（5）While rigidity increase, weight is reduced, the frequency of structure is added, it is ensured that power when vehicle is passed a bridge is steady
Determine characteristic.
Brief description of the drawings
The schematic cross-sectional view of compound section steel box girder in Fig. 1 embodiments one；
The schematic cross-sectional view of prestressed concrete plate in Fig. 2 embodiments one；
The schematic cross-sectional view of prefabricated steel box-girder in Fig. 3 embodiments one；
Partial schematic diagram in Fig. 4 Fig. 1 at C；
The combined box beam schematic cross-sectional view of Fig. 5 embodiments two；
The combined box beam schematic cross-sectional view of Fig. 6 embodiments three；
Mark in figure：1- prestressed concrete plates, 2- presstressed reinforcing steels, 3- tack coats, 4- steel sole plates, 5- webs, 6- steel-supports
Plate, 7- bottom plates shearing groove, 8- rubber washers, 9- bottom plates WELDING STUDS group, 10- bottom plate slightly expanded concretes, 11- top flange plates, 12-
On concrete roof, 13- top plates WELDING STUDS group, 14- top plates shearing groove, 15- top plate slightly expanded concretes, 16- lower bolsters, 17-
Backing plate, 18- nuts, 19- screw rods, 20- shear studs.
Embodiment
The following is the specific embodiment of the present invention, and technical scheme is described with reference to accompanying drawing, but this
Invention is not limited to these embodiments.
Embodiment one
The corresponding schematic diagram of the present embodiment is shown in Fig. 1, Fig. 2, Fig. 3 and Fig. 4.The present embodiment is applied to high-speed railway bridge and manufactures and pacify
Dress.Steel case in the present invention is by web（5）, steel sole plate（4）And top flange plate（11）Composition, inside has along one determining deviation cloth of longitudinal direction
The upper truss-like diaphragm plate put.Prestressed concrete plate is installed in steel case（1）, there is tack coat between the two（3）, prestressed concrete
Native plate（1）Inside there is presstressed reinforcing steel（2）.Top flange plate（11）On be connected with prefabricated concrete roof（12）, both pass through upper limb
Listrium（11）The top plate WELDING STUDS group welded on upper surface（13）It is connected.Accordingly, concrete roof（12）On be reserved with square
The top plate shearing groove of shape（14）, top plate slightly expanded concrete has been poured in it（15）.Steel case is in inverted trapezoidal, prestressed concrete plate
（1）Also it is inverted trapezoidal, and has bottom plate to shear groove（7）, correspondingly, steel sole plate（4）On be welded with bottom plate WELDING STUDS group（9）.Bottom plate
Shear groove（7）Bottom plate slightly expanded concrete is inside poured（10）.The method of construction of steel box-girder comprises the following steps in the present embodiment：
(a) diaphragm plate in factory's manufacture steel case, including steel case（Diaphragm plate and steel sole plate（4）Enough installations are reserved with advance should
Power concrete slab（1）Space）, the web of steel case（5）The ribbed stiffener of inner side, top flange plate（11）The longitudinal and transverse rib of lower surface, with
And top flange plate（11）The top plate WELDING STUDS group of upper surface（13）, in concrete prefabricated field, it is prefabricated will penetrate in steel case it is pre-
Prestressed concrete plate（1）, method for prefabricating is pre-tensioning system, and is made using long line method, makes a production line can be while prefabricated multi-disc
Prestressed concrete plate（1）, and in the reserved bottom plate shearing groove in relevant position（7）；
(b) in concrete prefabricated field, prefabricated top flange plate（11）On concrete slab（12）, and reserved top plate shearing groove（14）；
(c) by the corresponding steel case of same combination beam, concrete roof（12）, prestressed concrete plate（1）It is transported to job site；
(d) after adjustment support position, steel case is installed, then top flange plate is installed（11）On concrete roof（12）, cut in top plate
Power groove（14）Inside pour top plate slightly expanded concrete（15）, after its concrete strength reaches the 85% of design strength, it is allowed for access
Next step；
(e) in steel sole plate（4）Place the structural adhesive layer tack coat with design in upper surface（3）The steel-support plate of equal thickness（6）, and
Groove is sheared in bottom plate（7）Surrounding places rubber washer（8）, by prestressed concrete plate（1）Penetrate after steel case, adjustment position slowly
Fall, groove is sheared in bottom plate（7）Inside pour bottom plate slightly expanded concrete（10）, treat that its concrete strength reaches design strength
After 85%, next step of being allowed for access；
(f) enclosed beam both ends of the surface prestressed concrete plate（1）Gap between bottom plate and side, with steel case, and bottom at one end
Multiple slurry-feeding holes are installed, the side top of the other end installs multiple slurry outlets, gently from slurry-feeding hole pressure injection modified epoxy
Structure glue, until all slurry outlet pulps and bubble-free.
Embodiment two
The corresponding schematic diagram of the present embodiment is shown in Fig. 5.The present embodiment is the modification to embodiment one, changes prestressed concrete plate
（1）With steel sole plate（4）Connection method.In steel sole plate（4）Upper surface is welded with screw rod（19）, it is correspondingly, precast prestressed mixed
Concrete board（1）When, thereon, relevant position is reserved with vertical cavity.Prestressed concrete slab（1）Afterwards, screw rod（19）Under
To being above sequentially installed with lower bolster（16）, upper padding plate（17）And nut（18）.Prestressed concrete slab（1）Before, first install
Lower bolster（16）, then in screw rod（19）Upper overcoat rubber blanket, drops down onto lower bolster（16）Upper surface.
Embodiment three
The corresponding schematic diagram of the embodiment is shown in Fig. 6.The present embodiment is the modification to a upper embodiment.Coagulation is built using cast-in-place method
Native top plate（12）.Top flange plate（11）Upper surface is welded with shear stud（20）.Correspondingly, the step in method of construction is eliminated
(b), and by concrete roof prefabricated in step (d)（12）Installation, be changed to cast in situs.This embodiment reduces prefabricated work
Measure, and reduce installation workload, but need to strengthen site quality management, correspondingly increase the engineering time.
Claims (9)
1. a kind of compound section steel box girder for high-speed railway, surface is with general compound section steel box girder, including steel case, top flange
Plate, concrete roof, are connected between the latter two by being welded in the shear connector of top flange plate upper surface, it is characterised in that：
In the inside of steel case, steel sole plate is combined with prefabricated prestressed concrete plate, collectively as the bottom plate of compound section steel box girder.
2. a kind of compound section steel box girder for high-speed railway according to claim 1, it is characterised in that：In steel case it is pre- should
Power concrete slab is made using super high strength concrete.
3. a kind of compound section steel box girder for high-speed railway according to claim 2, it is characterised in that：The web of steel case is
Corrugated steel web.
4. a kind of compound section steel box girder for high-speed railway according to claim 2, it is characterised in that：In steel case it is pre- should
Power concrete slab is reserved with vertical hole, and screw rod, prestressed concrete are welded with the plate upper surface relevant position of steel case
Plate is connected with steel sole plate by structure glue, and fastening bolt, and keeps extruding closely connected.
5. a kind of compound section steel box girder for high-speed railway according to claim 2, it is characterised in that：In steel case it is pre- should
Power concrete slab leaves shearing groove when prefabricated, and steel case plate upper surface is correspondingly welded with WELDING STUDS group.
6. a kind of compound section steel box girder for high-speed railway according to claim 2, it is characterised in that：Have perpendicular inside steel case
To dividing plate, the prestressed concrete plate for being divided into prefabricated in multiple horizontal spaces, steel case inside steel case is also laterally divided into polylith.
7. a kind of compound section steel box girder for high-speed railway according to claim 1, its method of construction comprises the following steps：
(a) diaphragm plate in factory's manufacture steel case, including steel case（Diaphragm plate is reserved with enough installations with steel bottom plate and in advance should
The space of power armoured concrete slab）, the ribbed stiffener on the inside of steel case web, the longitudinal and transverse rib of top flange plate lower surface, and top flange
The shear connector of plate upper surface, in concrete prefabricated field, the prefabricated prestressed concrete plate that will be penetrated in steel case, prefabricated side
Method is pre-tensioning system, and is made using long line method, makes a production line can prefabricated multi-disc prestressed concrete plate, and corresponding simultaneously
The reserved shearing groove in position；
(b) concrete slab on concrete prefabricated field, prefabricated top flange plate, and reserved shearing groove；
(c) the corresponding steel case of same combination beam, concrete slab, prestressed concrete plate are transported to job site；
(d) after adjustment support position, steel case is installed, then the concrete slab on top flange plate is installed, is poured in shearing groove micro- swollen
Swollen concrete, slightly expanded concrete intensity is allowed for access next step after reaching the 85% of design strength；
(e) the thin steel branch backing plate of the structural adhesive layer equal thickness with designing is placed in steel case plate upper surface, and in shearing groove location
Surrounding places rubber washer, is slowly fallen after prestressed concrete plate is penetrated into steel case, adjustment position, is poured in shearing groove micro-
Expansive concrete, slightly expanded concrete intensity is allowed for access next step after reaching the 85% of design strength；
(f) gap between enclosed beam both ends of the surface prestressed concrete plate bottom plate and side, with steel case, and bottom peace at one end
Multiple slurry-feeding holes are filled, the side top of the other end installs multiple slurry outlets, gently from slurry-feeding hole pressure injection modified epoxy knot
Structure glue, until all slurry outlet pulps and bubble-free.
8. in a kind of compound section steel box girder for high-speed railway according to claim 1, its method of construction and claim 7
It is slightly different, in step (a), the shear connector welded on steel bottom plate is corresponding on screw rod, prestressed concrete plate
Ground reserving hole, the connection fastening bolt in step (e) tightens fixing bolt eventually afterwards completing step (f).
9. in a kind of compound section steel box girder for high-speed railway according to claim 1, its method of construction and claim 7
It is slightly different, the concrete slab on top flange plate is constructed using cast-in-place method.
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| CN107503278A (en) * | 2017-09-08 | 2017-12-22 | 上海市政工程设计研究总院（集团）有限公司 | A kind of truss-like steel box-girder diaphragm plate |
| CN108221709A (en) * | 2018-01-08 | 2018-06-29 | 清华大学 | A kind of corollary equipment and construction method for overbridge incremental launching construction |
| CN108221709B (en) * | 2018-01-08 | 2019-10-29 | 清华大学 | A kind of corollary equipment and construction method for overbridge incremental launching construction |
| CN108505445A (en) * | 2018-04-16 | 2018-09-07 | 中铁二局集团有限公司 | A kind of overbridge roof beam structure bridge construction method |
| CN109235223A (en) * | 2018-10-29 | 2019-01-18 | 中铁二院工程集团有限责任公司 | A kind of Novel steel-concrete composite beam bridge structure |
| CN111496996A (en) * | 2020-04-21 | 2020-08-07 | 周力 | Construction process of large-span assembly type steel-concrete combined simply-supported box girder |
| CN111676795A (en) * | 2020-06-29 | 2020-09-18 | 中铁二院工程集团有限责任公司 | Steel-concrete mixed combined continuous rigid frame bridge |
| CN111676795B (en) * | 2020-06-29 | 2021-12-21 | 中铁二院工程集团有限责任公司 | Steel-concrete mixed combined continuous rigid frame bridge |
| CN112095652A (en) * | 2020-08-28 | 2020-12-18 | 中铁三局集团有限公司 | Construction method of assembly type beam lifter foundation for high-speed railway box girder yard |
| CN112376385A (en) * | 2020-12-09 | 2021-02-19 | 南京工业大学 | Prefabricated corrugated steel web composite beam bridge and construction method thereof |
| CN113215959A (en) * | 2021-05-15 | 2021-08-06 | 石家庄铁道大学 | Shear-resistant connecting member for steel-concrete composite beam |
| CN113463502A (en) * | 2021-08-03 | 2021-10-01 | 苏交科集团股份有限公司 | Prefabricated assembled corrugated steel web composite bridge and cantilever construction method thereof |
| CN114016370A (en) * | 2021-12-09 | 2022-02-08 | 安徽省交通规划设计研究总院股份有限公司 | 'hysteresis type' narrow steel box composite beam and construction method thereof |
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