CN106284045B - A kind of secondary overlapping concrete slab girder steel combined bridge structure and its construction method - Google Patents

A kind of secondary overlapping concrete slab girder steel combined bridge structure and its construction method Download PDF

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Publication number
CN106284045B
CN106284045B CN201610831004.3A CN201610831004A CN106284045B CN 106284045 B CN106284045 B CN 106284045B CN 201610831004 A CN201610831004 A CN 201610831004A CN 106284045 B CN106284045 B CN 106284045B
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China
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concrete
girder
steel
welding studs
floorings
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CN201610831004.3A
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Chinese (zh)
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CN106284045A (en
Inventor
刘沐宇
李倩
张强
高宗余
卢志芳
邓晓光
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武汉理工大学
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    • EFIXED CONSTRUCTIONS
    • E01CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01DCONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
    • E01D1/00Bridges in general
    • EFIXED CONSTRUCTIONS
    • E01CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01DCONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
    • E01D19/00Structural or constructional details of bridges
    • E01D19/12Grating or flooring for bridges; Fastening railway sleepers or tracks to bridges
    • E01D19/125Grating or flooring for bridges
    • EFIXED CONSTRUCTIONS
    • E01CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01DCONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
    • E01D21/00Methods or apparatus specially adapted for erecting or assembling bridges
    • EFIXED CONSTRUCTIONS
    • E01CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01DCONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
    • E01D2101/00Material constitution of bridges
    • E01D2101/20Concrete, stone or stone-like material
    • E01D2101/24Concrete
    • E01D2101/26Concrete reinforced
    • E01D2101/268Composite concrete-metal

Abstract

The present invention relates to a kind of steel concrete combined bridge, more particularly to a kind of secondary overlapping concrete slab girder steel combined bridge structure and its construction method.The combined bridge structure, it is characterised in that it includes girder, secondary overlapping concrete slab and WELDING STUDS;The WELDING STUDS of cluster type or even distribution type is set on the girder;Girder is some along direction across bridge assembling, and all girders form overall along bridge is longitudinally connected, constitute porous one;Secondary overlapping concrete slab can be cast-in-place or preformed patterns, and entirety is connected to form by the WELDING STUDS and girder that are spaced using different-diameter different length.Instant invention overcomes not enough present in traditional cities overpass and overbridge construction, bridge overall mechanical properties are lifted simultaneously, reduce concrete shrinkage and creep effect, cracking resistance is good, save the construction period, urban viaduct is solved with cross-line bridge construction to the serious problem hindered with environmental pollution of traffic under bridge, promotes bridge to develop to batch production, standardization, assembling.

Description

A kind of secondary overlapping concrete slab-girder steel combined bridge structure and its construction Method

Technical field

The present invention relates to a kind of Composite Steel-Concrete Bridges, more particularly to a kind of secondary overlapping concrete slab-girder steel Combined bridge structure and its construction method.

Background technology

Composite Steel-Concrete Bridges are to be connected concrete slab with steel girder by shear connector to form overall common With the bridge structure form of stress.Compared with conventional concrete bridge, Composite Steel-Concrete Bridges are from heavy and light, and anti-seismic performance is good, Mobile load efficiency high, speed of application is fast, and girder is highly small, and structure is very thin, significantly increases under-clearance, while lifting Bridge Landscape Effect;Compared with steel bridge, good economy performance, overall anti-bending bearing capacity is improved, it is to avoid the problem of Steel Bridge Deck Pavement rapid wear, due to Its significant Technological Economy comprehensive advantage, is continuously available extensive use in bridge construction.

Current urban viaduct is main based on (prestressing force) concrete-bridge with overbridge, and full framing accounts for road construction, Supporting row frame vertical rod is intensive, and construction risk is big, cycle length and pollution environment, has a strong impact on people's trip around and daily life, Deepened continuously with bridge greenery construction theory, bridge construction is constantly to batch production, standardization, maximization, assembling direction Development is significantly to reduce influence of the bridge construction to natural environment and people's lives, and urban viaduct and overbridge construction operation Space is limited, and the duration is urgent, by secondary composite technology, one-piece casting or assembled double layer concrete floorings, at the same by steel- Concrete composite bridge burst is prefabricated, whole hole lifting, can significantly reduce to bridge construction working space demand, save construction work Phase, reduce the pollution of Construction on Environment, it is to avoid the urban congestion problem that floor stand construction is caused, in turn, ensure that each girder is common Stress, has given full play to prefabricated and cast-in-place concrete floorings comprehensive advantage;Simultaneously using maintenance in concrete, compensation shrink with The complex techniques such as toughness reinforcing, strengthen concrete slab toughness, solve super large superthin concrete floorings shrinkage cracking, particularly group Close that continuous bridge hogging moment area tension is easy to crack and its problem such as caused infiltration corrosion, significantly improve composite steel concrete bridge Girder construction durability, promotes Bridges in Our Country to develop to batch production, standardization, assembling etc..

The content of the invention

It is an object of the invention to provide the secondary overlapping concrete slab-girder steel combined bridge structure of one kind and its construction party Method, overcomes traditional cities overpass and deficiency present in overbridge construction, while lifting bridge overall mechanical properties, reduction is mixed Solidifying soil shrinkage and creep influence, effectively prevents concrete slab from ftractureing, it is ensured that bridge longevity is durable, solve urban viaduct with across The problem that line bridge construction is seriously hindered traffic under bridge, promotes bridge to develop to batch production, standardization, assembling.

To solve the above problems, the technical solution adopted in the present invention is:A kind of secondary overlapping concrete slab-girder steel Combined bridge structure, it is characterised in that it includes girder, secondary overlapping concrete slab (bottom and top layer double layer concrete bridge Panel) and WELDING STUDS;The WELDING STUDS of cluster type or even distribution type is set on the girder;Girder is some along direction across bridge assembling (such as 2~20), all girders form overall along bridge is longitudinally connected, constitute porous one;Secondary overlapping concrete slab Entirety is connected to form by WELDING STUDS and girder.

Described secondary overlapping concrete slab is made up of bottom concrete floorings and top layer concrete slab, bottom Layer concrete floorings are located on girder, and top layer concrete slab is located on bottom concrete floorings, bottom concrete bridge Be connected shape with girder by WELDING STUDS (respectively by short WELDING STUDS, the WELDING STUDS of length) for panel, top layer concrete slab It is integral, shared load.

According to above-mentioned technical proposal, the girder some along direction across bridge assembling, the distance between adjacent girder is 1.0~5.0 meters (root Ju Bridge Design width determines girder number).

Described WELDING STUDS, along bridge longitudinal direction, often row's WELDING STUDS can be respectively according to secondary overlapping double layer concrete bridge floor thickness of slab Degree interval uses different-diameter different length form.A diameter of Ф 13mm~Ф 30mm of WELDING STUDS, length be 50mm~ 450mm, single WELDING STUDS is 95mm~125mm along bridge longitudinal pitch, and horizontal spacing is 50mm~125mm, WELDING STUDS group edge Bridge can not be longitudinally equally spaced, and WELDING STUDS group's spacing is 500mm~1000mm.

A kind of construction method of above-mentioned secondary overlapping concrete slab-girder steel combined bridge structure, it is characterised in that bag Include following steps:

1) girder is using one of following manner:

1. described girder is that flute profile girder steel and FRP plate connect to be formed, and the top flange plate of flute profile girder steel sets WELDING STUDS, FRP plate is located at the top surface of flute profile girder steel, and FRP plate is fixed by WELDING STUDS with flute profile girder steel;

2. described girder is that i section steel beam and FRP plate connect to be formed, and the top flange plate of i section steel beam sets shearing Nail, FRP plate is located at the top surface of i section steel beam, and FRP plate is fixed by WELDING STUDS with i section steel beam;

3. described girder is box steel beam, and the top plate of box steel beam sets WELDING STUDS;

4. described girder is T steel beam, and the top flange steel plate of T steel beam sets WELDING STUDS;

5. described girder is i section steel beam, and the top flange steel plate of i section steel beam sets WELDING STUDS;

6. described girder is flute profile girder steel, and the top flange steel plate of flute profile girder steel sets WELDING STUDS;

2) assembled girder, bottom concrete floorings and top layer concrete slab form secondary overlapping concrete bridge deck Plate, it is implemented using one of following manner:

1. the whole hole lifting of (bottom concrete floorings and top layer concrete slab are cast-in-place) girder is placed in interim It is some along direction across bridge assembling on bearing, and entirety is longitudinally in turn connected to form along bridge, constitute porous one;Except pier top At support position, diaphragm can be not provided between adjacent girder, mainly passes through secondary overlapping concrete slab shared Load;

The curing concrete formation bottom concrete floorings in the high anti-crack fiber enhancing of one-piece casting lower shrinkage on girder, Realization is overlapped first;Using bottom concrete floorings as template, curing concrete, shape in the cast-in-place high anti-crack fiber enhancing of lower shrinkage Into top layer concrete slab, secondary overlapping is completed;The thick concrete slab plate of bottom concrete floorings, top layer successively passes through WELDING STUDS (respectively by short WELDING STUDS, the WELDING STUDS of length) is connected to form entirety with girder;

2. (bottom concrete floorings are cast-in-place, and top layer concrete slab is prefabricated, and top layer concrete slab is existing Setting up assembled) the whole hole lifting of girder is placed on temporary support, some along direction across bridge assembling, and along bridge longitudinal direction successively Connection forms overall, constitutes porous one;At pier top support position, diaphragm can be not provided between adjacent girder, mainly Pass through secondary overlapping concrete slab shared load;

The curing concrete formation bottom concrete floorings in the high anti-crack fiber enhancing of one-piece casting lower shrinkage on girder, Realization is overlapped first;Top layer concrete slab is prefabricated components, and top layer concrete slab is provided with WELDING STUDS preformed groove;Will Top layer concrete slab is lifted on bottom concrete floorings, and WELDING STUDS penetrates WELDING STUDS preformed groove, reserved to WELDING STUDS Casting concrete in wet seam between groove and top layer concrete slab, completes secondary overlapping;

3. (bottom concrete floorings are prefabricated, and top layer concrete slab is cast-in-place, and bottom concrete floorings are pre- Factory processed forms overall with the assembly of steel girder) (material is that maintenance is mixed in the high anti-crack fiber enhancing of lower shrinkage to bottom concrete floorings Solidifying soil) it is prefabricated components;Bottom concrete floorings are provided with WELDING STUDS preformed groove, and bottom concrete floorings are lifted into master Liang Shang, WELDING STUDS penetrates WELDING STUDS preformed groove, the casting concrete into WELDING STUDS preformed groove, and realization is overlapped first;

Girder and prefabricated bottom concrete floorings integral hoisting are placed on temporary support, along the assembled frame of direction across bridge If it is some, and longitudinally it is in turn connected to form entirety along bridge;Using bottom concrete floorings as template, the cast-in-place high cracking resistance of lower shrinkage Curing concrete in fiber reinforcement, forms top layer concrete slab, completes secondary overlapping;Bottom concrete floorings, top layer Concrete slab plate successively is connected to form entirety by WELDING STUDS with girder;

4. (bottom concrete floorings and top layer concrete slab be prefabricated components) bottom concrete floorings (material Expect for curing concrete in the high anti-crack fiber enhancing of lower shrinkage) it is prefabricated components;Bottom concrete floorings are provided with WELDING STUDS Preformed groove, bottom concrete floorings are lifted on girder, and WELDING STUDS penetrates WELDING STUDS preformed groove, into WELDING STUDS preformed groove Casting concrete, realization is overlapped first;

Girder and prefabricated bottom concrete floorings integral hoisting are placed on temporary support, along the assembled frame of direction across bridge If it is some, and longitudinally it is in turn connected to form entirety along bridge;Top layer concrete slab is prefabricated components, top layer concrete bridge deck Plate is provided with WELDING STUDS preformed groove;Top layer concrete slab is lifted on bottom concrete floorings, WELDING STUDS, which is penetrated, to be cut Power follows closely preformed groove, and coagulation is poured into the wet seam between WELDING STUDS preformed groove and the top layer concrete slab being staggered Soil, completes secondary overlapping;

3) after concrete curing reaches design strength, permanent bearing is installed, temporary support is removed, bridge deck paving is completed Dress, full-bridge insertion.

By above-mentioned technical proposal, embodiments thereof one:Described girder is by flute profile girder steel or i section steel beam and FRP Plate (Fiber Reinforced Polymer/Plastic, i.e. fibre reinforced composites, abbreviation FRP) connection is formed, flute profile The top flange plate of girder steel or i section steel beam sets WELDING STUDS, and FRP plate is located at the top surface of flute profile girder steel or i section steel beam (FRP plate is provided with FRP shear key), FRP plate is fixed by the top flange plate of WELDING STUDS and flute profile girder steel or i section steel beam; Bottom concrete floorings be the FRP plate that is disposed in advance using on the top flange plate of flute profile girder steel or i section steel beam as template, Curing concrete is formed in the high anti-crack fiber enhancing of lower shrinkage thick 5~10cm of one-piece casting, passes through short WELDING STUDS and girder Realization is overlapped first;After design strength being reached through maintenance, then it is overall with FRP plate with bottom concrete floorings thick 5~10cm For template, the high interior curing concrete of anti-crack fiber enhancing of lower shrinkage thick cast-in-place 10~20cm forms top layer concrete slab, Secondary overlapping is completed by long WELDING STUDS, combined bridge is formed entirety.Present embodiment make use of FRP plate high as template Strong lightweight, good endurance and the characteristics of need not remove, accelerate speed of application, it is to avoid traffic resistance caused by floor stand construction Find it difficult topic, while respectively using FRP plate, bottom concrete floorings and FRP plate integrally as placement layer by layer template, with disposable whole Body, which is poured, to be compared, and FRP mould material consumptions can be saved again, and bridge overall mechanical properties are good, and comprehensive benefit is notable.

Or, embodiments thereof one can also be using (further):Bottom concrete floorings and the thick concrete of top layer Provided with magnesium phosphate cement screed between floorings (material of magnesium phosphate cement screed is magnesium phosphate cement mortar);Bottom is mixed The FRP plate for coagulating soil floorings to dispose in advance using on flute profile girder steel or i section steel beam is template, and 5~10cm of one-piece casting is thick The enhancing of lower shrinkage high anti-crack fiber in curing concrete formed, complete to overlap first by short WELDING STUDS;Reached by maintenance To after design strength, magnesium phosphate cement mortar thick 5~10mm of laying, assembled prefabricated top layer concrete slab is (during storage Between >=6 months), anchor bolt is disposed, to the WELDING STUDS preformed groove on top layer concrete slab and top layer concrete slab Between wet seam in casting concrete and conserve, be passed to that long WELDING STUDS is secondary to be built up entirety.Such a embodiment party Formula being capable of accelerating construction progress, lifting bridge overall mechanical properties, while prefabricated concrete slab can also effectively reduce receipts Compression deformation is constrained the crack produced by girder steel, improves combined bridge durability.

By above-mentioned technical proposal, embodiments thereof two:Described girder is box steel beam or T steel beam, box steel beam Top plate or the top flange steel plate of T steel beam be provided with WELDING STUDS;Bottom concrete floorings are with the top plate of box steel beam Or the top flange steel plate of T steel beam is that maintenance is mixed in template, the high anti-crack fiber enhancing of lower shrinkage thick 5~10cm of one-piece casting Solidifying soil is formed, and is realized and overlapped first by short WELDING STUDS;After design strength being reached through maintenance, hoisting prefabricated top layer concrete On floorings to bottom concrete floorings;Top layer concrete slab is provided with WELDING STUDS preformed groove, and WELDING STUDS penetrates shearing Preformed groove is followed closely, the casting concrete into the wet seam between WELDING STUDS preformed groove and top layer concrete slab is cut by long Power nail completes secondary overlapping, combined bridge is formed entirety.Present embodiment make use of the top plate or T steel beam of box steel beam Top flange steel plate as template high-strength light, good endurance and the characteristics of need not remove, accelerate speed of application, it is to avoid fall Traffic hinders problem caused by floor-engaging frame construction.

By above-mentioned technical proposal, embodiment two can also be cast-in-place form using double layer concrete floorings.

By above-mentioned technical proposal, embodiments thereof three:Described girder is i section steel beam, the top flange of i section steel beam Steel plate is provided with WELDING STUDS;Bottom concrete floorings (material is curing concrete in the high anti-crack fiber enhancing of lower shrinkage) are pre- Component processed, 8~15cm is thick, and bottom concrete floorings are hung on girder, and bottom concrete floorings are reserved provided with WELDING STUDS Groove, WELDING STUDS penetrates WELDING STUDS preformed groove, the casting concrete into WELDING STUDS preformed groove, bottom concrete floorings with it is I-shaped Girder steel completes to overlap first by the short WELDING STUDS of cluster type in precast plant, forms prefabricated tee girder, and integral hoisting is erected at bridge On pier, arrange that prefabricated tee girder is some along direction across bridge, lay top layer concrete slab bar-mat reinforcement, mixed with the thick prefabricated bottoms of 8~15cm Solidifying soil floorings (curing concrete in the high anti-crack fiber enhancing of lower shrinkage) are template, found side form, thick low of cast-in-place 20~30cm Curing concrete in high anti-crack fiber enhancing is shunk, top layer concrete slab is formed, is realized by long WELDING STUDS secondary folded Close, make many girder shared loads.Bottom concrete floorings are prefabricated components in present embodiment, in precast plant and girder Prefabricated tee girder is built up, and top layer bridge deck concrete is poured as template, the integral rigidity of girder has both been added with holding Loading capability, while avoiding the traffic jam issue that floor stand construction is caused, improves efficiency of construction, shortens the construction period.

By above-mentioned technical proposal, embodiments thereof four:Described girder be i section steel beam or flute profile girder steel, it is I-shaped The top flange steel plate of girder steel sets WELDING STUDS;Bottom concrete floorings are prefabricated board (storage with top layer concrete slab Time >=6 month), WELDING STUDS preformed groove is equipped with bottom concrete floorings, top layer concrete slab;Bottom is prefabricated mixed Solidifying soil floorings are built up entirety first with girder by the short WELDING STUDS of cluster type, to WELDING STUDS preformed groove and bottom coagulation Casting concrete and conserved in wet seam between native floorings, assembled top layer after the thick magnesium phosphate cement mortars of 5~10mm of laying Concrete slab, coagulation is poured into the wet seam between WELDING STUDS preformed groove and the top layer concrete slab being staggered Soil, anchor connection bolt is passed to that long WELDING STUDS is secondary to be built up entirety.Such a embodiment can be greatly decreased mixed Native cast-in-place formwork erection-form removal process is coagulated, prefabricated concrete slab can effectively reduce concrete shrinkage and creep effect again, it is to avoid open Split, accelerating construction progress, improve combined bridge overall performance.

Described bottom concrete floorings, the material of top layer concrete slab are the high anti-crack fiber enhancing of lower shrinkage Interior curing concrete, early stage, mid-term and late expansion component is compounded with interior conserving material, formation composite expanding agent, and with Fiber is combined according to a certain percentage, and its component and content are:280~340kg/m of cement3, 60~100kg/m of flyash3, miberal powder 40~100kg/m3, 720~850kg/m of river sand3, 1000~1100kg/m of rubble3, 150~160kg/m of water3, swelling agent 20~ 40kg/m3, interior 0.5~0.8kg/m of sealing compound3, high-strength 2.5~5.5kg/m of organic polymer fiber3(or steel fibre 40~ 60kg/m3), 0.8~1.2kg/m of micron order modified absorben cotton cellulose3, 3.0~5.0kg/ of cement slurry micro-structural adjusting control agent m3, ultra-dispersed diminishing decrement, which is protected, moulds 6.5~9.5kg/m of additive3, concrete shrinkage and creep effect is effectively reduced, common height is prevented The cast in situs of reinforced concrete floorings causes cracking due to drying contraction, adds the toughness and cracking resistance energy of concrete slab Power, improves the durability of combined bridge.

Described swelling agent is that II types calcium sulphoaluminate-calcium oxide type swelling agent is used as swelling agent;Described interior sealing compound is 800 grades of haydites of book structure of the auspicious production of construction materials of Huainan gold;Described high-strength organic polymer fiber is what Changzhou Tian Yi companies produced High strength high modulus PVA fiber;Described micron order modified absorben cotton cellulose is made as:By absorbent cotton through mass concentration be 40~ After 45% sulfuric acid solution catalytic treatment 4h, the micron order modified absorben cotton cellulose that suction filtration drying is obtained, a diameter of 15 are carried out ~30nm, average length is 150~250nm;Described cement slurry micro-structural adjusting control agent is made for 3,4,9,10- 3,4, 9, 10-perylenetetracarboxylic dianhydrides For cement slurry micro-structural adjusting control agent;It is that the beautiful auspicious chemical industry polycarboxylic acids in Shanghai is efficient that modeling additive is protected in described ultra-dispersed diminishing decrement Water reducer compounds the diminishing economization agent prepared with sodium gluconate.

Described i section steel beam, flute profile girder steel, T steel beam, box steel beam, its web are be arranged symmetrically outward-dipping Web or vertical web, and settable general ribbed stiffener, T-shaped ribbed stiffener or U-shaped ribbed stiffener, K-type diaphragm plate in girder Or cross rib plate.Described girder is some according to the wide design arrangement of bridge along bridge lateral, and along bridge, longitudinally whole hole lifting is erected at On bridge pier, and can multispan be connected and realize the conversion of freely-supported-continuous system;Described bottom concrete floorings and top layer concrete bridge Panel (the secondary overlapping concrete slab of composition), can be cast-in-place or preformed patterns, and pass through different-diameter different length form WELDING STUDS is connected shared load with girder.

The lateral ties such as diaphragm can be not provided between different girder transverse directions, mainly pass through secondary overlapping concrete slab Realize the transmission of load between girder, realize the common stress of multi-disc girder, both reduced Site Welding workload, quickening construct into Degree, while adding the urban landscape effect of bridge.

Compared with prior art, the present invention has following remarkable result:

(1) secondary overlapping concrete slab-girder steel combined bridge of the invention, had both given full play to FRP plate (or main Top flange steel plate, the top plate of beam) as template light weight durable and the characteristics of need not remove, while again with bottom concrete plate with FRP plate (or top flange steel plate, top plate of girder) generally template pours top layer concrete slab, saved FRP plate (or Person's steel plate) material usage, good economy performance reduces live formwork erection-form removal process, and speed of application is fast.

(2) secondary overlapping concrete slab-girder steel combined bridge of the invention, secondary overlapping concrete slab is used A kind of curing concrete in high anti-crack fiber enhancing of lower shrinkage, its tensile strength is high, and good toughness, cracking resistance is excellent, significantly improves The durability of Composite Steel-Concrete Bridges.

(3) secondary overlapping concrete slab-girder steel combined bridge of the invention, it is to avoid a large amount of concrete cast-in-situs are caused Full space support construction risk, solve the urban traffic blocking problem that causes of floor stand construction, make combined bridge Functionality, quality and appealing design, Overall performance is high, good endurance, and bridge girder plant, standardization, assembling production can be achieved.

Brief description of the drawings

Fig. 1 is secondary overlapping concrete slab-girder steel combined bridge schematic cross-sectional view of the invention;

Fig. 2 is secondary overlapping concrete slab-schematic diagram of girder steel combined bridge embodiment one of the invention;

Fig. 3 is secondary overlapping concrete slab-schematic diagram of girder steel combined bridge embodiment two of the invention;

Fig. 4 is secondary overlapping concrete slab-schematic diagram of girder steel combined bridge embodiment three of the invention;

Fig. 5 is secondary overlapping concrete slab-schematic diagram of girder steel combined bridge embodiment four of the invention;

Fig. 6 is secondary overlapping concrete slab-girder steel combined bridge WELDING STUDS mounting structure schematic diagram of the invention;

Fig. 7 illustrates for secondary overlapping concrete slab-girder steel combined bridge K-type diaphragm plate of the present invention with cross rib plate Figure;

In figure:The top flange steel plate (top plate of girder) of 1.FRP plates or girder;2. bottom concrete floorings (it is cast-in-place or Person is prefabricated);3. top layer concrete slab (cast-in-place or prefabricated);Groove 4. (case) shape girder steel;5. i section steel beam;6. cut Power is followed closely;7. magnesium phosphate cement screed;8. elastic rubber strip;9.FRP shear key;10. straight web;11. skew web plate;12. it is general Ribbed stiffener;13.T shape ribbed stiffeners;14.U shape ribbed stiffeners;15.K types diaphragm plate or cross rib plate;16. WELDING STUDS preformed groove with it is prefabricated Wet seam between bottom (or top layer) concrete slab.

Embodiment

Technical scheme is further elaborated below in conjunction with Figure of description and specific preferably case study on implementation, together When the technology of the present invention can promote the use of Steel-concrete composite joist bridge etc..

In following embodiments, described swelling agent is used as swelling agent for II types calcium sulphoaluminate-calcium oxide type swelling agent;It is described Interior sealing compound for the auspicious production of construction materials of Huainan gold 800 grades of haydites of book structure;Described high-strength organic polymer fiber is Changzhou day The high strength high modulus PVA fiber of happy company's production;Described micron order modified absorben cotton cellulose is made as:By absorbent cotton through matter After concentration is measured for 40~45% sulfuric acid solution catalytic treatment 4h, the micron order modified absorben cotton fiber that suction filtration drying is obtained is carried out Element, a diameter of 15~30nm, average length is 150~250nm;Described cement slurry micro-structural adjusting control agent is 3,4,9,10- 3,4, 9, 10-perylenetetracarboxylic dianhydride is used as cement slurry micro-structural adjusting control agent;It is beautiful auspiciousization in Shanghai that modeling additive is protected in described ultra-dispersed diminishing decrement Work high-efficiency water-reducing agent of poly-carboxylic acid compounds the diminishing economization agent prepared with sodium gluconate.

Embodiment 1

As shown in Fig. 1,2,6,7, the present invention is achieved by the following technical solutions:A kind of secondary overlapping concrete bridge deck Plate-girder steel combined bridge structure, it includes girder, secondary overlapping concrete slab (bottom and top layer double layer concrete bridge floor Plate) and WELDING STUDS 6;The WELDING STUDS of cluster type or even distribution type is set on the girder;Girder is some (such as along direction across bridge assembling 2~20), all girders form overall along bridge is longitudinally connected, constitute porous one;Secondary overlapping concrete slab passes through WELDING STUDS 6 is connected to form entirety with girder.

Described secondary overlapping concrete slab is made up of bottom concrete floorings 2 and top layer concrete slab 3, Bottom concrete floorings 2 are located on girder, and top layer concrete slab 3 is located on bottom concrete floorings 2, bottom coagulation Native floorings 2, top layer concrete slab 3 are connected to form entirety, shared load by WELDING STUDS 6 and girder.

Described girder is by flute profile girder steel 4 and FRP plate 1 (Fiber Reinforced Polymer/Plastic, i.e. fibre Dimension enhancing composite, abbreviation FRP) formation is connected, the top flange plate of flute profile girder steel 4 sets WELDING STUDS 6, and FRP plate 1 is located at flute profile The top surface (FRP plate is provided with FRP shear key 9) of girder steel 4, FRP plate 1 is consolidated by the top flange plate of WELDING STUDS 6 and flute profile girder steel 1 It is fixed.

Wherein described girder web plate form is skew web plate 11, i.e. steel web and bottom plate is in certain angle of inclination and symmetrical cloth Put, general ribbed stiffener 12, T-shaped ribbed stiffener 13 or U-shaped ribbed stiffener 14 and K-type diaphragm plate 15 are set in flute profile girder steel 4.

A kind of construction method of above-mentioned secondary overlapping concrete slab-girder steel combined bridge structure, comprises the following steps: Girder is to be connected to be formed with FRP plate 1 by flute profile girder steel 4, and the top flange plate of flute profile girder steel 4 sets WELDING STUDS 6, and FRP plate 1 is located at groove The top surface of shape girder steel 4, FRP plate 1 is fixed by the top flange plate of WELDING STUDS and flute profile girder steel 4.The whole hole lifting of girder, which is placed in, faces When bearing on, it is some along direction across bridge assembling, and entirety is longitudinally in turn connected to form along bridge, constitute porous one;Except pier At topmast seat position, diaphragm can be not provided between adjacent girder, is mainly held jointly by secondary overlapping concrete slab Carry on a shoulder pole load.Bottom concrete floorings 2 are overall to be template with the FRP plate 1 disposed in advance on the top flange plate of flute profile girder steel 4 Pour curing concrete in the high anti-crack fiber enhancing of the thick lower shrinkages of 8cm to be formed, realized first by short WELDING STUDS and girder Overlapping;After reaching design strength through maintenance, then with bottom concrete floorings thick 8cm and the generally template of FRP plate 1, side is stood Curing concrete in mould, the high anti-crack fiber enhancing of lower shrinkage thick cast-in-place 16cm, forms top layer concrete slab 3, passes through length WELDING STUDS complete secondary overlapping, combined bridge is formed entirety.After reaching design strength through maintenance, side form is removed, bridge is changed The permanent bearing of beam, realizes bridge structure freely-supported-continuous system conversion, combined bridge is formed entirety, collective effect.This embodiment party The characteristics of formula make use of FRP plate 1 as template high-strength light, good endurance and need not remove, accelerates speed of application, it is to avoid Traffic hinders problem caused by floor stand construction, while overall with FRP plate 1, bottom concrete floorings 2 and FRP plate 1 respectively As placement layer by layer template, compared with disposable one-piece casting, FRP mould material consumptions, bridge entirety mechanical property can be saved again Can be good, comprehensive benefit is notable.

Connected between the secondary overlapping concrete slab and girder of the present embodiment by the WELDING STUDS 6 of cluster type, along bridge Beam longitudinal direction, often arranges WELDING STUDS and uses different-diameter different length form according to secondary overlapping bridge floor plate thickness interval.WELDING STUDS 6 is advised Lattice are respectively:(50mm, 200mm are length to Ф 19mm × 50mm and Ф 22mm × 200mm, and 50mm is short WELDING STUDS, 200mm For long WELDING STUDS, following meanings are identical);WELDING STUDS is distributed in cluster type, and as shown in Figure 2,6, single WELDING STUDS spacing is 100mm × 100mm, cluster type WELDING STUDS group is equally spaced, and center spacing is 600mm.

Described bottom concrete floorings 2, the material of top layer concrete slab 3 are that the high anti-crack fiber of lower shrinkage increases Curing concrete in strong, early stage, mid-term and late expansion component are compounded with interior conserving material, composite expanding agent is formed, and It is combined according to a certain percentage with fiber, its component and content are:Cement 280kg/m3, flyash 100kg/m3, miberal powder 100kg/ m3, river sand 850kg/m3, rubble 1000kg/m3, water 150kg/m3, swelling agent 20kg/m3, interior sealing compound 0.8kg/m3, it is high-strength to have Machine polymer fiber 2.5kg/m3, micron order modified absorben cotton cellulose 0.8kg/m3, cement slurry micro-structural adjusting control agent 3.0kg/ m3, ultra-dispersed diminishing decrement, which is protected, moulds additive 6.5kg/m3, concrete shrinkage and creep effect is effectively reduced, prevents common high-strength mixed Solidifying soil floorings cast in situs causes cracking due to drying contraction, adds the toughness and anti-crack ability of concrete slab, carries The high durability of combined bridge.

Embodiment 2

As shown in Fig. 1,3,6,7, the present invention is achieved by the following technical solutions:A kind of secondary overlapping concrete bridge deck Plate-girder steel combined bridge structure, it includes girder, secondary overlapping concrete slab (bottom and top layer double layer concrete bridge floor Plate) and WELDING STUDS 6;The WELDING STUDS of cluster type or even distribution type is set on the girder;Girder is some (such as along direction across bridge assembling 2~20), all girders form overall along bridge is longitudinally connected, constitute porous one;Secondary overlapping concrete slab passes through WELDING STUDS 6 is connected to form entirety with girder.

Described secondary overlapping concrete slab is made up of bottom concrete floorings 2 and top layer concrete slab 3, Bottom concrete floorings 2 are located on girder, and top layer concrete slab 3 is located on bottom concrete floorings 2, bottom coagulation Native floorings 2, top layer concrete slab 3 are connected to form entirety, shared load by WELDING STUDS 6 and girder.

Described girder is box steel beam 4, and the top plate of box steel beam is provided with WELDING STUDS 6.

As shown in figure 3, wherein described steel girder web plate form is that straight web 10, i.e. steel web and bottom plate are perpendicular and right Claim arrangement, T-shaped ribbed stiffener 13, U-shaped ribbed stiffener 14 and cross rib plate 15 are set in box-shaped steel girder 4.

A kind of construction method of above-mentioned secondary overlapping concrete slab-girder steel combined bridge structure, comprises the following steps: Described girder is box steel beam 4, and the top plate of box steel beam 4 is provided with WELDING STUDS 6.The whole hole lifting of girder is placed in temporary support On, it is some along direction across bridge assembling, and entirety is longitudinally in turn connected to form along bridge, constitute porous one;Except pier top bearing At position, diaphragm can be not provided between adjacent girder, mainly passes through secondary overlapping concrete slab shared load;

Bottom concrete floorings 2 is are template with the top plate 1 of box steel beam, and lower shrinkage height thick one-piece casting 10cm is anti- Split curing concrete in fiber reinforcement to be formed, realized and overlapped first by short WELDING STUDS;Top layer concrete slab 3 is prefabricated Component (storage 6 months), top layer concrete slab 3 is provided with WELDING STUDS preformed groove;Top layer concrete slab 3 is lifted into On bottom concrete floorings 2, WELDING STUDS 6 penetrates WELDING STUDS preformed groove, anchor bolt is disposed, to WELDING STUDS preformed groove and top layer Casting concrete in wet seam 16 between concrete slab, completes secondary overlapping by long WELDING STUDS, makes combined bridge Form overall.Present embodiment make use of the top plate of box steel beam as template high-strength light, good endurance and without dismounting Feature, accelerate speed of application, it is to avoid traffic hinders problem caused by floor stand construction.

Connected between the secondary overlapping double layer concrete floorings and steel girder of the present embodiment by cluster type WELDING STUDS 6, Two kinds of WELDING STUDS specifications are respectively:Ф 16mm × 80mm and Ф 22mm × 260mm;WELDING STUDS is distributed in cluster type, such as Fig. 3 institutes Show, single WELDING STUDS spacing is 125mm × 125mm, cluster type WELDING STUDS group is equally spaced, and center spacing is 1000mm.

Described bottom concrete floorings 2, the material of top layer concrete slab 3 are that the high anti-crack fiber of lower shrinkage increases Curing concrete in strong, early stage, mid-term and late expansion component are compounded with interior conserving material, composite expanding agent is formed, and It is combined according to a certain percentage with fiber, its component and content are:Cement 310kg/m3, flyash 80kg/m3, miberal powder 70kg/m3, River sand 785kg/m3, rubble 1050kg/m3, water 155kg/m3, swelling agent 30kg/m3, interior sealing compound 0.65kg/m3, it is high-strength organic Polymer fiber 3.5kg/m3, micron order modified absorben cotton cellulose 1.0kg/m3, cement slurry micro-structural adjusting control agent 4.0g/m3, Modeling additive 7.5kg/m is protected in ultra-dispersed diminishing decrement3, concrete shrinkage and creep effect is effectively reduced, common high-strength coagulation is prevented Native floorings cast in situs causes cracking due to drying contraction.

Embodiment 3

As shown in Fig. 1,4,6, the present invention is achieved by the following technical solutions:A kind of secondary overlapping concrete bridge deck Plate-girder steel combined bridge structure, it includes girder, secondary overlapping concrete slab (bottom and top layer double layer concrete bridge floor Plate) and WELDING STUDS 6;The WELDING STUDS 6 of cluster type or even distribution type is set on the girder;Girder is some along direction across bridge assembling (such as 2~20), all girders form overall along bridge is longitudinally connected, constitute porous one;Secondary overlapping concrete slab Entirety is connected to form by WELDING STUDS 6 and girder.

Described secondary overlapping concrete slab is made up of bottom concrete floorings 2 and top layer concrete slab 3, Bottom concrete floorings 2 are located on girder, and top layer concrete slab 3 is located on bottom concrete floorings 2, bottom coagulation Native floorings 2, top layer concrete slab 3 are connected to form entirety, shared load by WELDING STUDS 6 and girder.

Described girder is i section steel beam 5, and the top flange steel plate of i section steel beam 5 is provided with WELDING STUDS 6.

Vertically and horizontally general ribbed stiffener 12 can be set in the upper and lower flange plate and web of i section steel beam 5.

A kind of construction method of above-mentioned secondary overlapping concrete slab-girder steel combined bridge structure, comprises the following steps: Described girder is i section steel beam 5, and the top flange steel plate of i section steel beam 5 is provided with WELDING STUDS.Bottom concrete floorings 2 (material is curing concrete in the high anti-crack fiber enhancing of lower shrinkage) is prefabricated components, and 12cm is thick, by bottom concrete floorings 2 Hang on girder, bottom concrete floorings 2 are provided with WELDING STUDS preformed groove, and WELDING STUDS 6 penetrates WELDING STUDS preformed groove, to shearing Casting concrete in preformed groove is followed closely, bottom concrete floorings 2 are with i section steel beam 5 by the short WELDING STUDS 6 of cluster type pre- Factory processed is completed to be built up prefabricated tee girder first, and the tee girder of girder and prefabricated bottom concrete floorings formation is integrally hung Dress is placed on temporary support, some along direction across bridge assembling, and is longitudinally in turn connected to form entirety along bridge, lays top layer Concrete slab bar-mat reinforcement, (coagulation is conserved with the thick prefabricated bottom concrete floorings 2 of 12cm in the high anti-crack fiber enhancing of lower shrinkage Soil) it is joint seal elastic rubber strip 8 between template, the bottom concrete floorings 2 of different prefabricated tee girders, side form is found, it is cast-in-place Curing concrete in the high anti-crack fiber enhancing of lower shrinkage thick 25cm, forms top layer concrete slab 3, passes through long WELDING STUDS Secondary overlapping is realized, makes many girder shared loads, after maintenance reaches design strength, combined bridge overall structure is formed, Common stress.Bottom concrete floorings 2 are prefabricated components in present embodiment, and prefabricated T is built up in precast plant and girder Ellbeam, and top layer bridge deck concrete is poured as template, the integral rigidity and bearing capacity of girder have both been added, has been kept away simultaneously The traffic jam issue that floor stand construction is caused is exempted from, has improved efficiency of construction, shorten the construction period.

Connected between the secondary overlapping concrete slab and girder of the present embodiment by cluster type WELDING STUDS 6, along bridge Longitudinal direction, WELDING STUDS according to secondary overlapping double layer concrete bridge floor plate thickness interval using Ф 19mm × 90mm and Ф 25mm × Two kinds of forms of 300mm, WELDING STUDS is distributed in cluster type, as shown in Fig. 4,6, and single WELDING STUDS spacing is 100mm × 110mm, collection Beam formula WELDING STUDS group is not equally spaced, and center spacing is 700~900mm.

Described bottom concrete floorings 2, the material of top layer concrete slab 3 are that the high anti-crack fiber of lower shrinkage increases Curing concrete in strong, early stage, mid-term and late expansion component are compounded with interior conserving material, composite expanding agent is formed, and It is combined according to a certain percentage with fiber, its component and content are:Cement 340kg/m3, flyash 60kg/m3, miberal powder 40kg/m3, River sand 720kg/m3, rubble 1100kg/m3, water 160kg/m3, swelling agent 40kg/m3, interior sealing compound 0.5kg/m3, steel fibre 60kg/m3, micron order modified absorben cotton cellulose 0.8kg/m3, cement slurry micro-structural adjusting control agent 5.0kg/m3, ultra-dispersed diminishing Modeling additive 9.5kg/m is protected in decrement3, effectively reduce concrete shrinkage and creep effect, add the toughness of concrete slab with Anti-crack ability.

Embodiment 4

As shown in Fig. 1,5,6, the present invention is achieved by the following technical solutions:A kind of secondary overlapping concrete bridge deck Plate-girder steel combined bridge structure, it includes girder, secondary overlapping concrete slab (bottom and top layer double layer concrete bridge floor Plate) and WELDING STUDS 6;The WELDING STUDS 6 of cluster type or even distribution type is set on the girder;Girder is some along direction across bridge assembling (such as 2~20), all girders form overall along bridge is longitudinally connected, constitute porous one;Secondary overlapping concrete slab Entirety is connected to form by WELDING STUDS 6 and girder.

Described secondary overlapping concrete slab is made up of bottom concrete floorings 2 and top layer concrete slab 3, Bottom concrete floorings 2 are located on girder, and top layer concrete slab 3 is located on bottom concrete floorings 2, bottom coagulation Native floorings 2, top layer concrete slab 3 are connected to form entirety, shared load by WELDING STUDS 6 and girder.

Described girder is steel I-beam 5, and the top flange steel plate of i section steel beam 5 sets WELDING STUDS 6.

As shown in figure 5, described girder is i section steel beam 5, thereon, bottom wing listrium and web can be set and typically put more energy into Rib 12.

The thick prefabricated bottom concrete floorings 2 (storage 6 months) of i section steel beam 5 and 15cm are overlapped first in precast plant T-shaped girder is formed, and the lifting of whole hole is erected on bridge pier, multi-disc is arranged along direction across bridge, along bridge longitudinally through end anchorage plate Realize that multispan is connected, pour wet seam, maintenance reaches design strength;The thick magnesium phosphate cement mortars 7 of 10mm are laid, assembled 15cm is thick Prefabricated top layer curing concrete plate 3 (storage 6 months), disposes anchor bolt, then to the prefabricated wet seam of top layer floorings with In WELDING STUDS preformed groove 16 casting concrete and strengthen maintenance, make combined bridge double layer concrete floorings it is secondary be built up it is whole Body, with the common stress of steel girder.The secondary overlapping concrete slab of the present embodiment is prefabricated concrete slab, double-deck The wet seam interlaced arrangement of concrete slab.

A kind of construction method (the bottom concrete bridge of above-mentioned secondary overlapping concrete slab-girder steel combined bridge structure Panel 2 and top layer concrete slab 3 are prefabricated components), comprise the following steps:Described girder is i section steel beam 5, work The top flange steel plate of font girder steel 5 sets WELDING STUDS 6;Bottom concrete floorings 2 are prefabricated with top layer concrete slab 3 WELDING STUDS preformed groove is equipped with plate (resting period >=6 month), bottom concrete floorings 2, top layer concrete slab 3; Bottom concrete floorings 2 are lifted on girder, WELDING STUDS 6 penetrates WELDING STUDS preformed groove, poured to WELDING STUDS preformed groove mixed Solidifying soil, realization is overlapped first;

Girder and the prefabricated integral hoisting of bottom concrete floorings 2 are placed on temporary support, it is assembled along direction across bridge Set up some, and entirety is longitudinally in turn connected to form along bridge;

Lay after the thick magnesium phosphate cement mortars 7 of 5~10mm, top layer concrete slab 3 is lifted into bottom concrete bridge On panel 2, the casting concrete into the wet seam 16 between WELDING STUDS preformed groove and the top layer concrete slab being staggered, Anchor connection bolt, is passed to that long WELDING STUDS is secondary to be built up entirety.Coagulation can be greatly decreased in such a embodiment Cast-in-place formwork erection-form removal the process of soil, prefabricated concrete slab can effectively reduce concrete shrinkage and creep effect again, it is to avoid open Split, accelerating construction progress, improve combined bridge overall performance.

Connected between the secondary overlapping double layer concrete floorings and steel girder of the present embodiment by cluster type WELDING STUDS 6, Two kinds of WELDING STUDS specifications are respectively:Ф 13mm × 100mm and Ф 25mm × 250mm;WELDING STUDS is distributed in cluster type, such as Fig. 5 institutes Show, single WELDING STUDS spacing is 120mm × 120mm, cluster type WELDING STUDS group is equidistantly spaced from, and center spacing is 600mm.

Described bottom concrete floorings 2, the material of top layer concrete slab 3 are that the high anti-crack fiber of lower shrinkage increases Curing concrete in strong, early stage, mid-term and late expansion component are compounded with interior conserving material, composite expanding agent is formed, and It is combined according to a certain percentage with fiber, its component and content are:Cement 280kg/m3, flyash 60kg/m3, miberal powder 40kg/m3, River sand 720kg/m3, rubble 1000kg/m3, water 150kg/m3, swelling agent 20kg/m3, interior sealing compound 0.5kg/m3, it is high-strength organic poly- Compound fiber 2.5kg/m3(or steel fibre 40kg/m3), micron order modified absorben cotton cellulose 0.8kg/m3, cement slurry is micro- Structure regulating agent 3.0kg/m3, ultra-dispersed diminishing decrement, which is protected, moulds additive 6.5kg/m3, effectively reduce concrete shrinkage and creep effect Should, prevent common high-strength concrete floorings cast in situs from causing cracking due to drying contraction, add concrete slab Toughness and anti-crack ability, improve the durability of combined bridge.

The secondary overlapping concrete slab-girder steel combined bridge gives full play to what template need not be removed and can forever carried Feature, improves concrete slab cracking resistance, accelerates combined bridge speed of application, significantly shortens the construction period, solves long-term Environmental pollution and its urban traffic blocking problem caused, promote bridge girder plant, standardization, dress caused by floor stand construction With metaplasia production.

Claims (9)

1. a kind of secondary overlapping concrete slab-girder steel combined bridge structure, it is characterised in that it includes girder, secondary overlapping Concrete slab and WELDING STUDS;The WELDING STUDS of cluster type or even distribution type is set on the girder;Girder is along the assembled frame of direction across bridge If some, all girders form overall along bridge is longitudinally connected, constitute porous one;Secondary overlapping concrete slab is by cutting Power is followed closely is connected to form entirety with girder;
Described secondary overlapping concrete slab is made up of bottom concrete floorings and top layer concrete slab, and bottom is mixed Solidifying soil floorings are located on girder, and top layer concrete slab is located on bottom concrete floorings, bottom concrete floorings, Top layer concrete slab is connected to form entirety, shared load by WELDING STUDS and girder;
Bottom concrete floorings, top layer concrete slab are connected to form overall using following sides by WELDING STUDS and girder One of formula:
1. described girder is to be connected to be formed with FRP plate by flute profile girder steel or i section steel beam, flute profile girder steel or I-shaped The top flange plate of girder steel sets WELDING STUDS, and FRP plate is located at the top surface of flute profile girder steel or i section steel beam, and FRP plate passes through shearing The top flange plate followed closely with flute profile girder steel or i section steel beam is fixed;Bottom concrete floorings are with flute profile girder steel or I-shaped The FRP plate disposed in advance on the top flange plate of shape girder steel is that maintenance is mixed in template, the high anti-crack fiber enhancing of one-piece casting lower shrinkage Solidifying soil is formed, and is realized and is overlapped first with girder by short WELDING STUDS;After design strength being reached through maintenance, then with bottom concrete Curing concrete in floorings and FRP plate generally template, the cast-in-place high anti-crack fiber enhancing of lower shrinkage, forms top layer concrete bridge Panel, completes secondary overlapping by long WELDING STUDS, combined bridge is formed entirety;
2. magnesium phosphate cement screed is provided between bottom concrete floorings and top layer concrete slab;Bottom concrete bridge Panel be the FRP plate that is disposed in advance using on flute profile girder steel or i section steel beam as template, the high cracking resistance of one-piece casting lower shrinkage is fine Curing concrete is formed in dimension enhancing, completes to overlap first by short WELDING STUDS;After maintenance reaches design strength, laying Magnesium phosphate cement mortar, assembled prefabricated top layer concrete slab, disposes anchor bolt, on top layer concrete slab WELDING STUDS preformed groove and casting concrete in wet seam are simultaneously conserved, and are passed to that long WELDING STUDS is secondary to be built up entirety;
3. described girder is box steel beam or T steel beam, and the top plate of box steel beam or the top flange steel plate of T steel beam are set It is equipped with WELDING STUDS;Bottom concrete floorings be using the top flange steel plate of the top plate of box steel beam or T steel beam as template, it is whole Body pours curing concrete in the high anti-crack fiber enhancing of lower shrinkage and formed, and is realized and overlapped first by short WELDING STUDS;Through maintenance Reach after design strength, on hoisting prefabricated top layer concrete slab to bottom concrete floorings, top layer concrete bridge deck Plate is provided with WELDING STUDS preformed groove, and WELDING STUDS penetrates WELDING STUDS preformed groove, to WELDING STUDS preformed groove and top layer concrete slab Between wet seam in casting concrete, secondary overlapping is completed by long WELDING STUDS, combined bridge is formed entirety;
4. described girder is i section steel beam, and the top flange steel plate of i section steel beam is provided with WELDING STUDS;Bottom concrete bridge Panel is prefabricated components, and bottom concrete floorings are hung on girder, and bottom concrete floorings are provided with WELDING STUDS preformed groove, WELDING STUDS penetrates WELDING STUDS preformed groove, the casting concrete into WELDING STUDS preformed groove, bottom concrete floorings and I-steel Beam completes to overlap first by the short WELDING STUDS of cluster type in precast plant, forms prefabricated tee girder, and integral hoisting is erected at bridge pier On, arrange that prefabricated tee girder is some along direction across bridge, top layer concrete slab bar-mat reinforcement is laid, with prefabricated bottom concrete floorings For template, curing concrete in side form, the cast-in-place high anti-crack fiber enhancing of lower shrinkage is found, top layer concrete slab is formed, passes through Long WELDING STUDS realizes secondary overlapping, makes many girder shared loads;
5. described girder is i section steel beam or flute profile girder steel, and the top flange steel plate of i section steel beam or flute profile girder steel is set Put WELDING STUDS;Bottom concrete floorings are prefabricated board with top layer concrete slab, and bottom concrete floorings, top layer are mixed WELDING STUDS preformed groove is equipped with solidifying soil floorings;Bottom precast concrete floorings pass through the short WELDING STUDS of cluster type with girder Entirety is built up first, to WELDING STUDS preformed groove and casting concrete in the wet seam of bottom floorings and is conserved, and lays phosphoric acid Assembled top layer concrete slab, is poured into the wet seam between WELDING STUDS preformed groove and top layer floorings after magnesium cement mortar Concrete, anchor connection bolt is passed to that long WELDING STUDS is secondary to be built up entirety.
2. the secondary overlapping concrete slab-girder steel combined bridge structure of one kind according to claim 1, its feature exists In:Described WELDING STUDS longitudinally can use different-diameter along bridge according to the thickness interval of secondary overlapping double layer concrete floorings Different length form, a diameter of Ф 13mm~Ф 30mm of WELDING STUDS, length is 50mm~450mm, and single WELDING STUDS is along bridge Longitudinal pitch is 95mm~125mm, and horizontal spacing is 50mm~125mm, and WELDING STUDS group can not longitudinally be equally spaced along bridge, WELDING STUDS group's spacing is 500mm~1000mm.
3. a kind of construction method of secondary overlapping concrete slab-girder steel combined bridge structure as claimed in claim 1, its It is characterised by comprising the following steps:
1) girder is using one of following manner:
1. described girder is that flute profile girder steel and FRP plate connect to be formed, and the top flange plate of flute profile girder steel sets WELDING STUDS, FRP plate Positioned at the top surface of flute profile girder steel, FRP plate is fixed by WELDING STUDS with flute profile girder steel;
2. described girder is that i section steel beam and FRP plate connect to be formed, and the top flange plate of i section steel beam sets WELDING STUDS, FRP plate is located at the top surface of i section steel beam, and FRP plate is fixed by WELDING STUDS with i section steel beam;
3. described girder is box steel beam, and the top plate of box steel beam sets WELDING STUDS;
4. described girder is T steel beam, and the top flange steel plate of T steel beam sets WELDING STUDS;
5. described girder is i section steel beam, and the top flange steel plate of i section steel beam sets WELDING STUDS;
6. described girder is flute profile girder steel, and the top flange steel plate of flute profile girder steel sets WELDING STUDS;
2) assembled girder, bottom concrete floorings and top layer concrete slab form secondary overlapping concrete slab, its Implement using one of following manner:
1. the whole hole lifting of girder is placed on temporary support, some along direction across bridge assembling, and is longitudinally sequentially connected along bridge Form overall, constitute porous one;At pier top support position, diaphragm can be not provided between adjacent girder, is mainly passed through Secondary overlapping concrete slab shared load;
Curing concrete formation bottom concrete floorings in the high anti-crack fiber enhancing of one-piece casting lower shrinkage, are realized on girder Overlap first;Using bottom concrete floorings as template, curing concrete in the cast-in-place high anti-crack fiber enhancing of lower shrinkage forms top Layer concrete floorings, complete secondary overlapping;The thick concrete slab plate of bottom concrete floorings, top layer successively passes through shearing Nail is connected to form entirety with girder;
2. the whole hole lifting of girder is placed on temporary support, some along direction across bridge assembling, and is longitudinally sequentially connected along bridge Form overall, constitute porous one;At pier top support position, diaphragm can be not provided between adjacent girder, is mainly passed through Secondary overlapping concrete slab shared load;
Curing concrete formation bottom concrete floorings in the high anti-crack fiber enhancing of one-piece casting lower shrinkage, are realized on girder Overlap first;Top layer concrete slab is prefabricated components, and top layer concrete slab is provided with WELDING STUDS preformed groove;By top layer Concrete slab is lifted on bottom concrete floorings, and WELDING STUDS penetrates WELDING STUDS preformed groove, to WELDING STUDS preformed groove and Casting concrete in wet seam between top layer concrete slab, completes secondary overlapping;
3. bottom concrete floorings are prefabricated components;Bottom concrete floorings are provided with WELDING STUDS preformed groove, and bottom is mixed Solidifying soil floorings are lifted on girder, and WELDING STUDS penetrates WELDING STUDS preformed groove, the casting concrete into WELDING STUDS preformed groove, realizes Overlap first;
Girder and prefabricated bottom concrete floorings integral hoisting are placed on temporary support, if along direction across bridge assembling It is dry, and longitudinally it is in turn connected to form entirety along bridge;Using bottom concrete floorings as template, the cast-in-place high anti-crack fiber of lower shrinkage Curing concrete in enhancing, forms top layer concrete slab, completes secondary overlapping;Bottom concrete floorings, top layer coagulation Native floorings plate successively is connected to form entirety by WELDING STUDS with girder;
4. bottom concrete floorings are prefabricated components;Bottom concrete floorings are provided with WELDING STUDS preformed groove, and bottom is mixed Solidifying soil floorings are lifted on girder, and WELDING STUDS penetrates WELDING STUDS preformed groove, the casting concrete into WELDING STUDS preformed groove, realizes Overlap first;
Girder and prefabricated bottom concrete floorings integral hoisting are placed on temporary support, if along direction across bridge assembling It is dry, and longitudinally it is in turn connected to form entirety along bridge;Top layer concrete slab is on prefabricated components, top layer concrete slab Provided with WELDING STUDS preformed groove;Top layer concrete slab is lifted on bottom concrete floorings, WELDING STUDS penetrates WELDING STUDS Preformed groove, the casting concrete into the wet seam between WELDING STUDS preformed groove and the top layer concrete slab being staggered is complete Into secondary overlapping;
3) after concrete curing reaches design strength, permanent bearing is installed, temporary support is removed, completes bridge deck and mats formation, entirely Bridge insertion.
4. a kind of construction method of secondary overlapping concrete slab-girder steel combined bridge structure according to claim 3, It is characterized in that:Described girder is to be connected to be formed with FRP plate by flute profile girder steel or i section steel beam, flute profile girder steel or work The top flange plate of font girder steel sets WELDING STUDS, and FRP plate is located at the top surface of flute profile girder steel or i section steel beam, and FRP plate passes through The top flange plate of WELDING STUDS and flute profile girder steel or i section steel beam is fixed;Bottom concrete floorings be with flute profile girder steel or The FRP plate disposed in advance on the top flange plate of i section steel beam is template, and the high cracking resistance of lower shrinkage thick 5~10cm of one-piece casting is fine Curing concrete is formed in dimension enhancing, is realized and is overlapped first with girder by short WELDING STUDS;After design strength being reached through maintenance, Again with bottom concrete floorings thick 5~10cm and FRP plate generally template, the high cracking resistance of lower shrinkage thick cast-in-place 10~20cm Curing concrete in fiber reinforcement, forms top layer concrete slab, completes secondary overlapping by long WELDING STUDS, makes composite bridge Beam forms entirety.
5. a kind of construction method of secondary overlapping concrete slab-girder steel combined bridge structure according to claim 3, It is characterized in that:Magnesium phosphate cement screed is provided between bottom concrete floorings and top layer concrete slab;Bottom is mixed The FRP plate for coagulating soil floorings to dispose in advance using on flute profile girder steel or i section steel beam is template, and 5~10cm of one-piece casting is thick The enhancing of lower shrinkage high anti-crack fiber in curing concrete formed, complete to overlap first by short WELDING STUDS;Reached by maintenance To after design strength, magnesium phosphate cement mortar thick 5~10mm of laying, assembled prefabricated top layer concrete slab disposes anchor Fixing bolt, to the WELDING STUDS preformed groove on top layer concrete slab and casting concrete in wet seam and is conserved, and is passed to Long WELDING STUDS is secondary to be built up entirety.
6. a kind of construction method of secondary overlapping concrete slab-girder steel combined bridge structure according to claim 3, It is characterized in that:Described girder is box steel beam or T steel beam, the top plate of box steel beam or the top flange of T steel beam Steel plate is provided with WELDING STUDS;Bottom concrete floorings be using the top flange steel plate of the top plate of box steel beam or T steel beam as Curing concrete is formed in template, the high anti-crack fiber enhancing of lower shrinkage thick 5~10cm of one-piece casting, real by short WELDING STUDS Now overlap first;After design strength being reached through maintenance, hoisting prefabricated top layer concrete slab to bottom concrete floorings On, top layer concrete slab is provided with WELDING STUDS preformed groove, and WELDING STUDS penetrates WELDING STUDS preformed groove, to WELDING STUDS preformed groove and Casting concrete in wet seam between top layer concrete slab, completes secondary overlapping by long WELDING STUDS, makes composite bridge Beam forms entirety.
7. a kind of construction method of secondary overlapping concrete slab-girder steel combined bridge structure according to claim 3, It is characterized in that:Described girder is i section steel beam, and the top flange steel plate of i section steel beam is provided with WELDING STUDS;Bottom coagulation Native floorings are prefabricated components, and 8~15cm is thick, and bottom concrete floorings hang on girder, set on bottom concrete floorings There is WELDING STUDS preformed groove, WELDING STUDS penetrates WELDING STUDS preformed groove, the casting concrete into WELDING STUDS preformed groove, bottom concrete bridge Panel completes to overlap first with i section steel beam by the short WELDING STUDS of cluster type in precast plant, forms prefabricated tee girder, and integrally Lifting is erected on bridge pier, is arranged that prefabricated tee girder is some along direction across bridge, is laid top layer concrete slab bar-mat reinforcement, thick with 8~15cm Prefabricated bottom concrete floorings are template, stand in side form, the high anti-crack fiber enhancing of lower shrinkage thick cast-in-place 20~30cm and support Concrete is protected, top layer concrete slab is formed, secondary overlapping is realized by long WELDING STUDS, makes many girder shared lotuses Carry.
8. a kind of construction method of secondary overlapping concrete slab-girder steel combined bridge structure according to claim 3, It is characterized in that:Described girder is the top flange of i section steel beam or flute profile girder steel, i section steel beam or flute profile girder steel Steel plate sets WELDING STUDS;Bottom concrete floorings and top layer concrete slab are prefabricated board, bottom concrete floorings, WELDING STUDS preformed groove is equipped with top layer concrete slab;Bottom precast concrete floorings and girder are short by cluster type WELDING STUDS is built up entirety first, to WELDING STUDS preformed groove and casting concrete in the wet seam of bottom floorings and conserves, and spreads If assembled top layer concrete slab after 5~10mm thickness magnesium phosphate cement mortars, to WELDING STUDS preformed groove and top layer floorings it Between wet seam in casting concrete, anchor connection bolt is passed to that long WELDING STUDS is secondary to be built up entirety.
9. a kind of secondary overlapping concrete slab-girder steel combined bridge knot according to any one in claim 3-8 The construction method of structure, it is characterised in that:Described bottom concrete floorings, the material of top layer concrete slab are low receipts Contract the high interior curing concrete of anti-crack fiber enhancing, and its component and content are:280~340kg/m of cement3, flyash 60~ 100kg/m3, 40~100kg/m of miberal powder3, 720~850kg/m of river sand3, 1000~1100kg/m of rubble3, 150~160kg/ of water m3, 20~40kg/m of swelling agent3, interior 0.5~0.8kg/m of sealing compound3, high-strength 2.5~5.5kg/m of organic polymer fiber3Or 40~60kg/m of steel fibre3, 0.8~1.2kg/m of micron order modified absorben cotton cellulose3, cement slurry micro-structural adjusting control agent 3.0 ~5.0kg/m3, ultra-dispersed diminishing decrement, which is protected, moulds 6.5~9.5kg/m of additive3
CN201610831004.3A 2016-09-19 2016-09-19 A kind of secondary overlapping concrete slab girder steel combined bridge structure and its construction method CN106284045B (en)

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