CN109457609A - A kind of prefabricated steel reinforced concrete combined bridge deck - Google Patents
A kind of prefabricated steel reinforced concrete combined bridge deck Download PDFInfo
- Publication number
- CN109457609A CN109457609A CN201811477790.7A CN201811477790A CN109457609A CN 109457609 A CN109457609 A CN 109457609A CN 201811477790 A CN201811477790 A CN 201811477790A CN 109457609 A CN109457609 A CN 109457609A
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- bridge deck
- concrete
- floorings
- prefabricated
- steel
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
- E01D19/12—Grating or flooring for bridges; Fastening railway sleepers or tracks to bridges
- E01D19/125—Grating or flooring for bridges
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D21/00—Methods or apparatus specially adapted for erecting or assembling bridges
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Bridges Or Land Bridges (AREA)
Abstract
The present invention provides a kind of prefabricated steel reinforced concrete combined bridge decks, including Orthotropic steel bridge deck structure and concrete prefabricated floorings, by the way that preformed hole is arranged in concrete prefabricated floorings, and WELDING STUDS is arranged in Orthotropic Steel Bridge Deck corresponding position, it is inserted into the WELDING STUDS in Orthotropic Steel Bridge Deck in the corresponding preformed hole of concrete prefabricated floorings, high-strength mortar is inserted in the preformed hole to make precast concrete floorings and Orthotropic Steel Bridge Deck form combined bridge deck, epoxy bonds layer is laid in steel reinforced concrete interface simultaneously, for levelling and closing steel concrete interface, to improve the durability of combined bridge deck.The type floorings have higher promotional value in aspects such as applicability, economy, processing quality, construction periods, have developing meaning to some reference.
Description
Technical field
The present invention relates to technical field of bridge engineering, specifically a kind of prefabricated steel reinforced concrete combined bridge deck.
Background technique
Steel-mixes combined bridge because its applicability, economy and construction convenience have been widely adopted, but considers ordinary concrete
Floorings self weight is larger, therefore its across footpath often becomes limiting factor.It is general still using orthogonal different for Loads of Long-span Bridges
Property Steel Bridge Deck structural system.Since the system floorings Out-of Plane Stiffness is weaker, fatigue crack easily is generated under Vehicle Load,
There is presently no mature measure solutions, therefore it is barely satisfactory in terms of durability.
Steel reinforced concrete combined bridge deck starts from the Japan of the sixties in last century, and certain application and hair are obtained in the beginning of this century
The advantages of opening up, combining normal strength concrete slab and steel bridge deck because of it, is increasingly taken seriously at present.But traditional steel reinforced concrete combination
Floorings inevitably generate concrete shrinkage crack mostly using Steel Bridge Deck as concreting mould bases, and with
The reduction (reduction of construction weight) of concrete plate thickness, crack can be more easier to generate.Additionally, due to site operation, concrete layer construction
Geometric accuracy be also difficult to be guaranteed.
Summary of the invention
The purpose of the present invention is to provide a kind of prefabricated steel reinforced concrete combined bridge decks, in conjunction with common concrete bridge plate, orthotropic
The advantages of steel bridge deck and traditional cast-in-place steel reinforced concrete combined bridge deck, thus make that structure is reasonable, cost economic, construction letter
It is single, it is easy for construction.
To achieve the goals above, technical scheme is as follows: a kind of prefabricated steel reinforced concrete combined bridge deck, including orthogonal
Anisotropic Steel Bridge Deck structure, it is characterised in that: concrete prefabricated floorings are set above Orthotropic steel bridge deck structure, pass through coagulation
Preformed hole is set in native prefabricated bridge, and arranges WELDING STUDS in Orthotropic Steel Bridge Deck corresponding position, is made just after installation
It hands over the WELDING STUDS on anisotropic steel bridge deck to be inserted into the corresponding preformed hole of concrete prefabricated floorings, is inserted in the preformed hole
High-strength mortar is handed over to make precast concrete floorings and Orthotropic Steel Bridge Deck form combined bridge deck in steel reinforced concrete
Interface is laid with epoxy bonds layer, for levelling and closing steel concrete interface, to improve the durability of combined bridge deck.
Further, concrete prefabricated floorings plate thickness is 80mm ~ 160mm, and precast construction can avoid early-age shrinkage cracking
Generation.
Further, by the way that vertically and horizontally last-cost joint realizes concrete prefabricated floorings between plate between concrete prefabricated floorings
Connection, trapezoidal notch is arranged in concrete prefabricated floorings edge, to reinforce vertically and horizontally resisting for prefabricated bridge and cast-in-place seam
Cut ability.
Further, use UHPC high strength concrete as cast-in-place seam filler between concrete prefabricated floorings.
Further, such as practical structure bridge panel tensile stress is larger, then it is mixed that steel fibre can be used in concrete prefabricated floorings
Solidifying soil is solved by way of cable stay bridge panel in vitro/in vivo beam.
Further, diameter 45 ~ 60mm circular hole can be used in concrete prefabricated floorings preformed hole, comprehensively consider floorings by
Power and construction convenience, circular hole lay vertically and horizontally between be divided into 300 ~ 600mm, by the later period insert high-strength epoxy mortar realize with
The connection of floorings corresponding position WELDING STUDS.
Further, the concrete prefabricated floorings are embedded with suspension hook.
Further, Orthotropic steel bridge deck structure includes steel bridge deck and U-shaped floor of putting more energy into, and Steel Bridge Deck plate thickness is 10mm
~ 12mm, U-shaped ribbed stiffener plate thickness are 5 ~ 7mm, and 250 ~ 350mm of height is spaced 600~900mm, is in inverted trapezoidal, in conjunction with concrete
Native floorings reserve the position of circular hole, and the weldering that arrangement specification is φ 16 above steel bridge deck is followed closely, and weld 80~120mm of staple height, lead to
Later phase filling high-strength mortar realizes the connection with floorings corresponding position shear connector.
Main advantages of the present invention are: the present invention combines after using steel reinforced concrete, and concrete plate is not involved in stress early period, and reduction is opened
It splits, therefore concrete bridge plate can select ordinary concrete, reduce cost；Simultaneously because the advantages of precast construction itself, quality is easy to
Control.Floorings of the present invention are inserted into the preformed hole of concrete prefabricated floorings using weldering nail shear connector, using high-strength epoxy
Mortar entirety packing preformed hole can greatly reduce concrete plate cracking so that prestressing effect is similar to prefabricated board " group's nail " principle
Possibility.Prefabricated steel reinforced concrete combined bridge deck of the invention combines common concrete bridge plate, Orthotropic Steel Bridge Deck and tradition existing
The advantages of pouring steel reinforced concrete combined bridge deck, the floorings structural form can effectively solve the problem that conventional orthogonal opposite sex floorings fatigue crack
Generation, improve the durability of bridge.In conclusion the type combined bridge deck applicability, economy, processing quality,
The aspects such as construction period have higher promotional value, have developing meaning to some reference.
Detailed description of the invention
Fig. 1 is prefabricated steel reinforced concrete combined bridge deck cross-section diagram.
Fig. 2 is precast concrete floorings plan view.
Fig. 3 is precast concrete floorings reinforcing bar and weldering nail arrangement schematic diagram.
Fig. 4 is precast concrete floorings preformed hole backfilling mortar schematic diagram.
Fig. 5 is prefabricated steel reinforced concrete combined bridge deck layout drawing.
Specific embodiment
It is further detailed to a kind of prefabricated steel reinforced concrete combined bridge deck work proposed by the present invention below in conjunction with drawings and concrete examples
It describes in detail bright.According to following explanation and claims, advantages and features of the invention will be become apparent from.It should be noted that attached drawing is equal
Using very simplified form and using non-accurate ratio, only to facilitate, lucidly aid in illustrating the embodiment of the present invention
Purpose.
Illustrate a kind of prefabricated steel reinforced concrete combined bridge deck of this example, including precast concrete floorings 1 in conjunction with Fig. 1 to Fig. 5
With Orthotropic steel bridge deck structure 2, the precast concrete floorings 1 include vertically and horizontally regular reinforcement 10, orthotropic plate
Face structure includes steel bridge deck 2 and U-shaped ribbed stiffener 3, and the steel bridge deck 2 is equipped with weldering nail shear connector 7, steel bridge deck 2 and pre-
Epoxy bonds layer 9 is set between concrete slab 1 processed.
Concrete slab 1 uses precast construction, and edge is arranged trapezoidal notch 5 and reinforces prefabricated board and cast-in-place seam 11 vertically and horizontally
Shear resistance.Diameter 50mm preformed hole 4 is set in concrete prefabricated board 1, and the vertically and horizontally interval of laying is 600mm, this is reserved
It hole must be corresponding with weldering nail 7 position of shear connector.
Concrete prefabricated board is stored after a certain period of time (180 days), is transported to scene and is prepared lifting.It need to be in steel bridge deck when lifting
Apical margin is laid with epoxy bonds layer 9, while placing prefabricated board in place using pre-buried suspension hook 6, finally uniformly uses high-strength epoxy
The whole packing preformed hole 4 of mortar 8.The present invention combines after using steel reinforced concrete, and concrete plate is not involved in stress early period, reduces cracking.
Preferably, the preformed hole includes the reverse taper hole of superposed straight hole and straight hole bottom, and bottom sets back taper
Hole can facilitate prefabricated bridge in-site installation.
Seam 11 is watered between precast slab after and forms entirety.Since cast-in-place concrete seam portion shrinkage and creep is imitated
Answer larger, additional floorings plate thickness is smaller, (in general, cast-in-place seam only accounts under the premise of excessively not increasing floorings cost
To 20% or so of floorings total amount), UHPC high strength concrete can be used as cast-in-place seam filler to avoid the generation in crack.
Due to making precision and construction Deformation etc., between precast concrete and steel bridge deck interface inevitably
There can be gap, moisture rainwater, which penetrates into, probably influences floorings durability.For considering in this respect, in steel while erecting plate
Mixed interface is laid with epoxy bonds layer, for levelling and closing interface, to improve its durability.
Compared to normal concrete or pure steel structure floorings, either along bridge to or direction across bridge load-carrying members, lotus
Carrying local effect often becomes design governing factor.Steel reinforced concrete combined bridge deck can then give full play to the advantages of compound section, energy
Enough mitigate floorings system weight and saves cost.Due to becoming composite structure, the type floorings and common precast concrete phase
Than the thickness for reducing concrete plate, mitigate weight；Reduce steel plate thickness compared with general orthotropic steel bridge deck system and increases U
Type is put more energy into rib space, the problem of reducing bridge deck rolled steel dosage, while avoiding steel bridge deck fatigue cracking；With it is general cast-in-place
Combined bridge deck is compared, and floorings batch production manufacture, quality is easier to guarantee, early period, crack was few, while can store certain time
After install, reduce shrinkage and creep on structure influence.Concrete grillage is set using steel plate as bracket, while can be spread in steel reinforced concrete interface
If epoxy bonds layer is for levelling and closing steel concrete interface, to improve the durability of combined bridge deck.
With thickness 15cm concrete prefabricated board, steel bridge deck plate thickness 12mm, the interval U rib plate thickness 6mm(720mm) it is prefabricated
For steel reinforced concrete combined bridge deck, compared with the concrete slab of general thickness 25cm, reduce by about 20% bridge deck weight；With
The interval general thickness 16mm, U rib plate thickness 8mm(600mm) pure steel structure floorings compare, reduce about 30% rolled steel dosage.?
Construction size can be advanced optimized on the basis of this, to further increase the economic advantages of steel reinforced concrete combined bridge deck.
Foregoing description is only the description to present pre-ferred embodiments, not to any restriction of the scope of the invention, this hair
Any change, the modification that the those of ordinary skill in bright field does according to the disclosure above content, belong to the protection of claims
Range.
Claims (6)
1. a kind of prefabricated steel reinforced concrete combined bridge deck, including Orthotropic steel bridge deck structure, it is characterised in that: orthotropic steel bridge deck
Concrete prefabricated floorings are arranged in superstructure, by the way that preformed hole is arranged in concrete prefabricated floorings, and in orthotropic steel
Floorings corresponding position arranges WELDING STUDS, and the WELDING STUDS in Orthotropic Steel Bridge Deck is made to be inserted into concrete prefabricated bridge after installation
In the corresponding preformed hole of panel, in the preformed hole insert high-strength mortar to make precast concrete floorings with it is orthogonal different
Property steel bridge deck formed combined bridge deck, while steel reinforced concrete interface be laid with epoxy bonds layer, for it is levelling and closing steel concrete hand over
Interface, to improve the durability of combined bridge deck.
2. prefabricated steel reinforced concrete combined bridge deck according to claim 1, it is characterised in that: concrete prefabricated floorings plate thickness is
80mm~160mm。
3. prefabricated steel reinforced concrete combined bridge deck according to claim 1, it is characterised in that: lead between concrete prefabricated floorings
It crosses between plate vertically and horizontally last-cost joint and realizes the connection of concrete prefabricated floorings, dovetail groove is arranged in concrete prefabricated floorings edge
Mouthful, to reinforce the vertically and horizontally shear resistance of prefabricated bridge Yu cast-in-place seam.
4. prefabricated steel reinforced concrete combined bridge deck according to claim 3, it is characterised in that: adopted between concrete prefabricated floorings
Use UHPC high strength concrete as cast-in-place seam filler.
5. prefabricated steel reinforced concrete combined bridge deck according to claim 1, it is characterised in that: concrete prefabricated floorings preformed hole
Diameter 45 ~ 60mm circular hole can be used, circular hole is divided into 300 ~ 600mm between laying vertically and horizontally.
6. prefabricated steel reinforced concrete combined bridge deck according to claim 1, it is characterised in that: Orthotropic steel bridge deck structure includes
Steel bridge deck and U-shaped floor of putting more energy into, Steel Bridge Deck plate thickness are 10mm ~ 12mm；U-shaped ribbed stiffener plate thickness is 5 ~ 7mm, highly 250 ~
350mm is spaced 600~900mm, is in inverted trapezoidal；The weldering that arrangement specification is φ 16 above steel bridge deck is followed closely, and weldering staple height 80~
120mm。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811477790.7A CN109457609A (en) | 2018-12-05 | 2018-12-05 | A kind of prefabricated steel reinforced concrete combined bridge deck |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811477790.7A CN109457609A (en) | 2018-12-05 | 2018-12-05 | A kind of prefabricated steel reinforced concrete combined bridge deck |
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| Publication Number | Publication Date |
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| CN109457609A true CN109457609A (en) | 2019-03-12 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201811477790.7A Pending CN109457609A (en) | 2018-12-05 | 2018-12-05 | A kind of prefabricated steel reinforced concrete combined bridge deck |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110130216A (en) * | 2019-04-26 | 2019-08-16 | 中铁大桥（南京）桥隧诊治有限公司 | A kind of overlapping connection structure of steel truss girder bridge and concrete carriageway plate |
-
2018
- 2018-12-05 CN CN201811477790.7A patent/CN109457609A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110130216A (en) * | 2019-04-26 | 2019-08-16 | 中铁大桥（南京）桥隧诊治有限公司 | A kind of overlapping connection structure of steel truss girder bridge and concrete carriageway plate |
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