CN105648909A - Fabricated combined bridge deck structure provided with grid type connector and construction method thereof - Google Patents
Fabricated combined bridge deck structure provided with grid type connector and construction method thereof Download PDFInfo
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- CN105648909A CN105648909A CN201610000380.8A CN201610000380A CN105648909A CN 105648909 A CN105648909 A CN 105648909A CN 201610000380 A CN201610000380 A CN 201610000380A CN 105648909 A CN105648909 A CN 105648909A
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
- E01D19/12—Grating or flooring for bridges; Fastening railway sleepers or tracks to bridges
- E01D19/125—Grating or flooring for bridges
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D21/00—Methods or apparatus specially adapted for erecting or assembling bridges
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Abstract
The invention discloses a fabricated combined bridge deck structure provided with a grid type connector and a construction method thereof. The combined bridge deck structure is formed by assembling at least two steel plate-fiber concrete combined type components. Each steel plate-fiber concrete combined type component comprises a steel bridge deck slab located on the lower portion and prefabricated fiber concrete pieces poured on the steel bridge deck slab. One grid type connector is arranged in the butt joint area of every two adjacent steel plate-fiber concrete combined type components. The grid type connector comprises cast-in-place fiber concrete pieces and grid reinforcement components fixedly connected to the corresponding steel bridge deck. The grid reinforcement components is completely covered with the prefabricated fiber concrete pieces located on the two sides of the butt joint area and the cast-in-place fiber concrete pieces located in the butt joint area. The prefabricated fiber concrete pieces and the cast-in-place fiber concrete pieces are connected through the grid reinforcement components, so that an integrated fiber concrete layer is formed. The two adjacent steel bridge deck slabs are fixedly connected to form an integrated steel bridge deck slab layer.
Description
Technical field
The present invention relates to the architectural detail of a kind of bridge structure and construction thereof, particularly to a kind of assembled combined bridge deck structure and construction method thereof.
Background technology
Existing steel bridge Cement Concrete Deck Paving Course adopts the form of construction work that monoblock type is cast-in-place, as it is shown in figure 1, after having constructed, be formed with cast-in-place concrete pave-load layer 7, be prefabricated with reinforcing steel bar 15 in cast-in-place concrete pave-load layer 7 on steel bridge deck layer 1. Existing conventional bridge surface cement concrete great majority of mating formation adopt cast-in-place construction mode, due to the easy shrinkage cracking of bridge deck concrete, existing cast-in-place construction technology cannot ensure construction quality, and the maintenance difficulty of large-area cast-in-place concrete is very big, concrete strength can be subject to very big reduction because maintenance is not in place, and this will greatly reduce the service life of bridge deck pavement. Further, since the cast-in-place construction time is long, in evening open to traffic time, this can affect local traffic and economic development further.
Development and progress along with material science, very-high performance fiber concrete is occurred in that in bridge construction field, although the bridge deck structure obtained after adopting fiber concrete construction has obvious advantage, but owing to existing Surfacing Construction technique is limited to integral cast-in-situ construction method, on floorings, build fiber concrete by integral cast-in-situ construction method and there is a lot of problem: such as engineering construction is long in time limit, production efficiency low, production cost is difficult to control to; On-site construction operations is inconvenient, and large-area cast in place concrete plate steam curing difficulty is big; Reinforcing bar and fiber concrete are all vulnerable to the adverse effect of environment, environmentally sensitive property is big, especially a large amount of existence of chloride ion in air under marine environment, being great threat for the stainless property of reinforcing bar and the durability of cast-in-place concrete, its properties of fiber concrete layer after building is difficult to be protected.
In addition, prior art also begins to fabricated steel-fiber concrete combined bridge deck structure occur, but existing assembled combined bridge deck structure exists that seam crossing local stress is excessive, pave-load layer is easily generated crack, the durability of bridge deck structure and anti-fatigue performance are difficult to meet the defects such as instructions for use.
Summary of the invention
Present invention aims to above-mentioned technical problem propose a kind of to adopt the tensile strength that can improve combined bridge deck structure local that assembly construction method builds and rigidity, reduction fabricated construction seam stress, effectively prevent the generation of pave-load layer crack, good endurance, the assembled steel with grating type joint-fiber concrete combined bridge deck structure that anti-fatigue performance is good, also provide for a kind of efficiency of construction height, construction cost is little, construction speed the is fast assembled steel with grating type joint-fiber concrete combined bridge deck structure construction method simultaneously.
This invention address that the technical scheme that above-mentioned technical problem adopts is: a kind of assembled combined bridge deck structure with grating type joint, described combined bridge deck structure includes at least two block plates-fiber concrete combination type component and is assembled; Described steel plate-fiber concrete combination type component includes the steel bridge deck being positioned at bottom and the prefibers concrete element built on steel bridge deck; The docking region of adjacent two blocks of described steel plates-fiber concrete combination type component is provided with grating type joint; Described grating type joint includes cast-in-place fiber concrete part and the grid stiffener being consolidated on steel bridge deck; Described grid stiffener is coated with the cast-in-place fiber concrete part being positioned at described docking region completely by the prefibers concrete element being arranged in both sides, described docking region, and described prefibers concrete element and cast-in-place fiber concrete part connect and compose the fiber concrete layer of entirety by described grid stiffener; Two pieces of adjacent described steel bridge decks connect the fixing steel bridge deck layer forming entirety; At least one end, the two ends of every piece of steel bridge deck is connected with a grid stiffener, described grid stiffener is connected with the prefibers concrete element in steel plate-fiber concrete combination type component along the side that bridge is longitudinal in build-in mode, and described grid stiffener is connected with described cast-in-place fiber concrete part along the opposite side that bridge is longitudinal in build-in mode.
In the present invention, the fiber concrete seam of described prefibers concrete element and described cast-in-place fiber concrete part is arranged on the top of described grid stiffener.
In the present invention, being configured with in described steel plate-fiber concrete combination type component along bridge longitudinal extension and run through first longitudinal reinforcing steel bar of described steel bridge deck and be connected to the longitudinal reinforcing steel bar of second between grid stiffener, the docking region of adjacent two blocks of described steel plates-fiber concrete combination type component is provided with connection reinforcing bar; By connecting steel reinforcement abutting joints connection between described first longitudinal reinforcing steel bar.
In the present invention, described gridiron structure includes intersecting the vertical bridge that connects to steel rod elements and direction across bridge steel rod elements; Described direction across bridge steel rod elements be installed in described vertical bridge above steel rod elements or described direction across bridge steel rod elements be located in described vertical bridge on steel rod elements and described direction across bridge steel rod elements and vertical bridge be connected to steel rod elements is fixing.
In the present invention, the top of described fiber concrete layer is covered with wearing course; The faying face place of described steel bridge deck layer and described fiber concrete layer is provided with shear structure.
In the present invention, described prefibers concrete element and cast-in-place fiber concrete part are mainly built by one or several of RPC, very-high performance fibre reinforced concrete and slip casting fiber concrete and are formed.
The present invention provides a kind of construction method obtaining the above-mentioned assembled combined bridge deck structure with grating type joint, comprises the following steps:
S1 makes steel plate-fiber concrete combination type component:
A, being respectively welded stationary grizzly stiffener at steel bridge deck two ends, the outside of described grid stiffener reserves, with the outside of described steel bridge deck, the space docking region;
B, the inner side of grid stiffener is docked be located on steel bridge deck second longitudinal reinforcing steel bar, and lay first longitudinal reinforcing steel bar, be uniformly arranged shear structure at the end face of steel bridge deck simultaneously;
C, fiber concrete is built on described steel bridge deck and covered the space except docking region obtain prefibers concrete element, first longitudinal reinforcing steel bar stretches out from the end of prefibers concrete element, prepares the steel plate-fiber concrete combination type component with grid stiffener;
The combined and spliced steel plate of S2-fiber concrete combination type component:
A, take two pieces by the prefabricated steel plate with the grid stiffener-fiber concrete combination type component of step (1) method, and make two block plates-fiber concrete combination type component along the longitudinally-aligned abutting of bridge, form docking region;
B, first welding are positioned at adjacent two steel bridge decks bottom territory, docking area, are then welded to connect with grid stiffener by be located in docking region second longitudinal reinforcing steel bar, and are connected with connecting reinforcement welding in docking region by first longitudinal reinforcing steel bar;
C, toward docking region in build fiber concrete, complete the combined and spliced of adjacent two block plates-fiber concrete combination type component;
S3 repeats assembling successively: steel plate-fiber concrete combination type component is also longitudinally assembled docking successively according to segmental construction method by the operation of repeat the above steps (2) along bridge, forms overall, continuous print steel bridge deck layer and fiber concrete layer;
S4 is roughened formation road surfaces at the end face of described fiber concrete layer or overlays wearing course above described fiber concrete layer, completes the construction of the assembled combined bridge deck structure with grating type joint.
In the present invention, the external coating of the steel bridge deck described in step S1 and grid stiffener has preservative.
Compared with prior art, it is an advantage of the current invention that:
1. the assembled steel of the present invention-fiber concrete combined bridge deck structure is a kind of can effectively to apply the combined bridge deck structure that fabricated construction mode carries out constructing, the advantage that the combined bridge deck structure of the present invention makes full use of packaged type bridges form of construction work, can not only effectively shorten the construction period, reduce production cost, improve construction quality, and the adverse effect that construction environment is likely to bring can be reduced, the installation of component is simple, easy construction.
2. the assembled steel of the present invention-fiber concrete combined bridge deck structure is mainly by the common stress of fiber concrete layer and steel bridge deck layer, owing to have employed assembly construction method, the combined bridge deck structure of the present invention have employed grating type joint especially, this grating type joint includes vertically and horizontally steel rod elements especially, this special structural design reduces joint location steel bridge deck and rib stress under vehicle wheel load in length and breadth thereof, greatly strengthen anti-interlayer slip ability between seam crossing fiber concrete and steel bridge deck, and fiber concrete is had " reinforcement " and the effect of " cuff ", significantly reduce the risk of fiber concrete gaping of joints.
Generally speaking, the present invention by arranging grating type joint in assembled steel-fiber concrete combined bridge deck structure (especially Orthotropic Steel Bridge Deck combinative structure), the advantage making fabricated construction technique is able to fully, effectively brings into play, this not only facilitates constructing operation, provide efficiency of construction, and be more beneficial for ensureing the construction quality of combined bridge deck structure.From practical application effect, the combined bridge deck structure of the present invention does not change the general thickness of bridge deck structure, greatly strengthen anti-interlayer slip ability between seam crossing fiber concrete and steel bridge deck, and fiber concrete is had the effect of " reinforcement " and " cuff ", local strength and the rigidity of combined bridge deck structure can be effectively improved, reduce seam crossing stress level, effectively prevent the generation in seam crossing crack. There is great practical value and good economic benefit, the construction particularly in steel bridge large-scale, super-huge has broad application prospects.
Accompanying drawing explanation
Fig. 1 is conventional orthorhombic opposite sex steel box-girder integral rigidity bridge deck structure schematic diagram (cross-sectional view) in prior art;
Fig. 2 is the perspective diagram (omitting wearing course in figure) overlooking direction of assembled steel in the embodiment of the present invention-fiber concrete combined bridge deck structure;
Fig. 3 is the sectional view (Fig. 3 compares Fig. 2 and reduces wearing course) at A-A place in Fig. 2;
Fig. 4 is the sectional view (Fig. 4 compares Fig. 2 and reduces wearing course) at A1-A1 place in Fig. 2;
Fig. 5 is the combined bridge deck structure view (not pouring into a mould state during cast-in-place fiber concrete part) when combined and spliced construction procedure in the embodiment of the present invention;
Fig. 6 is the internal structure schematic diagram of the assembled combined bridge deck structure with grating type joint in the embodiment of the present invention.
Detailed description of the invention
In order to be illustrated more clearly that technical scheme, below in conjunction with drawings and Examples, technical scheme is further elaborated, apparently, only some embodiments of the present invention are described below, for those of ordinary skill in the art, under the premise not paying creative work, it is also possible to obtain other embodiment according to these embodiments.
Referring to figs. 1 through Fig. 6, a kind of assembled combined bridge deck structure with grating type joint, combined bridge deck structure includes at least two block plates-fiber concrete combination type component 14 and is assembled; Steel plate-fiber concrete combination type component 14 includes the steel bridge deck 13 being positioned at bottom and the prefibers concrete element 4 built on steel bridge deck 13; The docking region of adjacent two block plates-fiber concrete combination type component 14 is provided with grating type joint; Grating type joint includes cast-in-place fiber concrete part 3 and the grid stiffener 5 being consolidated on steel bridge deck 13; Grid stiffener 5 is coated with the cast-in-place fiber concrete part 3 being positioned at docking region completely by the prefibers concrete element 4 being arranged in docking both sides, region, and prefibers concrete element 4 and cast-in-place fiber concrete part 3 connect and compose the fiber concrete layer 2 of entirety by grid stiffener 5; Two pieces of adjacent steel bridge decks 13 connect the fixing steel bridge deck layer 1 forming entirety; At least one end, the two ends of every piece of steel bridge deck 13 is connected with a grid stiffener 5, grid stiffener 5 is connected with the prefibers concrete element 4 in steel plate-fiber concrete combination type component 14 along the side that bridge is longitudinal in build-in mode, and grid stiffener 5 is connected with cast-in-place fiber concrete part 3 along the opposite side that bridge is longitudinal in build-in mode.
Concrete, assembled combined bridge deck structure with grating type joint is mainly longitudinally sequentially connected be assembled (part-structure only illustrating adjacent two piece in figure) by plurality of steel plates-fiber concrete combination type component 14 along bridge, steel plate-fiber concrete combination type component 14 includes the steel bridge deck 13 being positioned at bottom and the prefibers concrete element 4 built on steel bridge deck 13, and the docking region of adjacent two block plates-fiber concrete combination type component 14 is provided with grating type joint.This grating type joint includes cast-in-place fiber concrete part 3 and the grid stiffener 5 being fixed on steel bridge deck 13, and grid stiffener 5 is coated with (i.e. the pre-buried fiber concrete layer 2 of grid stiffener 5) by the prefibers concrete element 4 being arranged in docking both sides, region completely with the cast-in-place fiber concrete part 3 being arranged in docking region. Connecting into overall fiber concrete layer 2 in " build-in " mode between grid stiffener 5 and prefibers concrete element 4 and between grid stiffener 5 and cast-in-place fiber concrete part 3, adjacent steel bridge deck 13 forms overall steel bridge deck layer 1 by being welded to connect at steel plate seam 9 place.
Steel plate-fiber concrete combination type component 14 includes precast construction and cast-in-place structural, be evenly dividing successively by steel bridge deck 13 is four pieces of regions, wherein, middle two pieces is preform region, two pieces of end are cast-in-place region, it is provided with a grid stiffener 5 between preform region and cast-in-place region and this grid stiffener 5 symmetry is laid in preform region and cast-in-place region, middle two pieces of preform region are built fiber concrete formation prefibers concrete element 4 and are constituted precast construction by pre-buried for grid stiffener 5 half, second half dew of grid stiffener 5 is put in two pieces of cast-in-place regions of end, two pieces of cast-in-place regions at steel bridge deck 13 two ends are used for forming cast-in-place structural. during construction, first adjacent two block plates-fiber concrete combination type component 14 is welded to connect at steel plate seam 9 place by steel bridge deck 13, adjacent composition docking region, two pieces of cast-in-place regions, then in docking region, build fiber concrete to form cast-in-place fiber concrete part 3 and constitute cast-in-place structural, thus adjacent steel plate-fiber concrete combination type component 14 connects the fixing assembled combined bridge deck structure formed with grating type joint.
In one embodiment, it is later stage cast in situs owing to docking the fiber concrete structure in region, junction between prefibers concrete element 4 and cast-in-place fiber concrete part 3 can form a fiber concrete seam 11, and this fiber concrete seam 11 is the weak location of stress. For this, fiber concrete seam 11 position between prefibers concrete element 4 and cast-in-place fiber concrete part 3 is arranged on the top of grid stiffener 5. The local strength that can be greatly improved in bridge deck structure fiber concrete seam 11 position by grid stiffener 5 and rigidity, considerably reduce the stress level at fiber concrete seam 11 place, improve the structural stability of bridge deck structure.
In one embodiment, owing to the grid stiffener 5 in steel plate-fiber concrete combination type component 14 and between steel plate-fiber concrete combination type component 14 is all self-existent, it does not have be longitudinally formed the inside stiffener of a complete connection along bridge. For this, being configured with in steel plate-fiber concrete combination type component 14 along bridge longitudinal extension and run through first longitudinal reinforcing steel bar 6 of steel bridge deck 13 and be connected to the longitudinal reinforcing steel bar 6a of second between grid stiffener 5, the docking region of adjacent two block plates-fiber concrete combination type component 14 is provided with connection reinforcing bar 10; By connecting reinforcing bar 10 docking connection between first longitudinal reinforcing steel bar 6. Adjacent first longitudinal reinforcing steel bar 6 is connected structure by connecting reinforcing bar 10, and adjacent grid stiffener 5 is connected by second longitudinal reinforcing steel bar 6a, the structural strength of the assembled combined bridge deck structure of elevator belt grating type joint. Preferably, also uniformly it is laid with the horizontal reinforcing steel bar crossing over first longitudinal reinforcing steel bar 6 and the second longitudinal direction reinforcing steel bar 6a in docking region, generally connects fixing by welding or steel wire bundle between horizontal reinforcing steel bar and first longitudinal reinforcing steel bar 6 and second longitudinal reinforcing steel bar 6a.
In one embodiment, gridiron structure includes intersecting the vertical bridge that connects to steel rod elements 52 and direction across bridge steel rod elements 51; Vertical bridge all can adopt the with holes of Length discrepancy or steel plate not with holes or angle steel or bar reinforcement to constitute to steel rod elements 52 and direction across bridge steel rod elements 51, direction across bridge steel rod elements 51 be installed in vertical bridge above steel rod elements 52 or direction across bridge steel rod elements 51 be located in vertical bridge on steel rod elements 52; Direction across bridge steel rod elements 51 be located in vertical bridge on steel rod elements 52 time, direction across bridge steel rod elements 51 and vertical bridge are fixed together by the mode such as welding between steel rod elements 52. In one embodiment, fiber concrete layer 2 is in use easy to wear, and for this, the top of fiber concrete layer 2 is covered with wearing course 8, wearing course 8 alternative fiber concrete layer 2 is used to wear and tear, the service life of the assembled combined bridge deck structure of elongated strap grating type joint.
In one embodiment, for strengthening the adhesiveness between steel bridge deck 13 and fiber concrete layer 2, the faying face place of steel bridge deck layer 1 and fiber concrete layer 2 is provided with shear structure, and this shear structure can adopt conventional WELDING STUDS 12.
In one embodiment, prefibers concrete element 4 and cast-in-place fiber concrete part 3 one or several by ultra-high performance concretes such as RPC, very-high performance fibre reinforced concrete and slip casting fiber concretes main are built and are formed. Wherein, ultra-high performance concrete specifically refers to the ultra-high performance concrete of more than bending and tensile strength 25MPa, comprcssive strength more than 130MPa.
Technical scheme can adopt the materials such as foregoing active powder concrete, very-high performance fibre reinforced concrete or slip casting fiber concrete, these preferred special concretes can not only ensure density, be conducive to improving the durability of steel bridge deck 13, and relatively thin bridge deck structure layer just can meet the designing requirement of tensile strength, will not substantially increase the weight of combined bridge deck structure dead load on the whole.
The above-mentioned assembled combined bridge deck structure with grating type joint, has that building height is little, rigidity big, each combination advantages such as interlayer adhesive property is good, good endurance, anti-fatigue performance are good, vehicular impact effect is little. Whole assembled steel-fiber concrete combined bridge deck structure is by fiber concrete layer 2 and the common stress of steel bridge deck layer 1. Owing to the concrete tensile strength of existing assembled steel-fiber concrete combined bridge deck structure seam crossing is very low, under variations in temperature and vehicle repeated stock effect, seam crossing is more prone to transverse crack, and grid stiffener 5 of the present invention substantially increases local strength and the rigidity of bridge deck structure seam crossing, considerably reduces seam crossing stress level; And owing to " build-in " of fiber concrete is acted on and " cuff " effect by grid stiffener 5, greatly strengthen anti-interlayer slip ability between seam crossing fiber concrete and steel bridge deck 13, and fiber concrete is had the effect of " reinforcement ", improve the tensile strength of seam, can effectively overcome the transverse crack problem being likely to occur.
The present invention provides a kind of construction method obtaining the above-mentioned assembled combined bridge deck structure with grating type joint, comprises the following steps:
S1 makes steel plate-fiber concrete combination type component 14:
A, being respectively welded stationary grizzly stiffener 5 at steel bridge deck 13 two ends, the outside of grid stiffener 5 reserves, with the outside of steel bridge deck 13, the space docking region;Namely end one segment distance of the positional distance Steel Bridge Deck being welded and fixed of grid stiffener 5 is to constitute docking region.
B, the inner side of grid stiffener 5 is carried out be located on steel bridge deck 13 second longitudinal reinforcing steel bar 6a respectively butt welding, and lay first longitudinal reinforcing steel bar 6, be uniformly arranged shear structure at the end face of steel bridge deck 13 simultaneously; Being coupled together by two the grid stiffeners 5 being located on logical one piece of steel bridge deck 13 by second longitudinal reinforcing steel bar 6a, generally shear structure is made up of uniform welding WELDING STUDS 12 on steel bridge deck 13.
C, fiber concrete is built on steel bridge deck 13 and covered the space except docking region obtain prefibers concrete element 4, first longitudinal reinforcing steel bar 6 stretches out from the end of prefibers concrete element 4, prepares the steel plate-fiber concrete combination type component 14 with grid stiffener 5; Namely grid stiffener 5 and first longitudinal reinforcing steel bar 6 part are embedded in prefibers concrete element 4.
The combined and spliced steel plate of S2-fiber concrete combination type component 14:
A, take two pieces by the prefabricated steel plate with the grid stiffener 5-fiber concrete combination type component 14 of step (1) method, and make two block plates-fiber concrete combination type component 14 along the longitudinally-aligned abutting of bridge, form docking region;
B, first welding are positioned at adjacent two steel bridge decks 13 bottom territory, docking area, then it is welded to connect being located at dock in region second longitudinal reinforcing steel bar 6a with grid stiffener 5, and first longitudinal reinforcing steel bar 6a is welded to connect at docking region connection reinforcing bar 10; By second longitudinal reinforcing steel bar 6a, two grid stiffeners 5 of adjacent two pieces of steel bridge deck 13 butt ends are coupled together.
C, toward docking region in build fiber concrete obtain cast-in-place fiber concrete part 3, grid stiffener 5 in docking region and first longitudinal longitudinal reinforcing steel bar 6a of reinforcing steel bar 6, second are imbedded in cast-in-place fiber concrete part 3, completes the combined and spliced of adjacent two block plates-fiber concrete combination type component 14;
S3 repeats assembling successively: steel plate-fiber concrete combination type component 14 is also longitudinally assembled docking successively according to segmental construction method by the operation of repeat the above steps (2) along bridge, forms overall, continuous print steel bridge deck layer 1 and fiber concrete layer 2;
S4 is roughened formation road surfaces at the end face of fiber concrete layer 2 or overlays wearing course 8 above fiber concrete layer 2, completes the construction of the assembled combined bridge deck structure with grating type joint.
Preferably, the external coating of the steel bridge deck 13 in step S1 and grid stiffener 5 has preservative, it is possible to be effectively improved steel bridge deck 13 and the antiseptic property of grid stiffener 5, extends the service life of bridge.
The construction method of the assembled combined bridge deck structure with grating type joint described below, comprises the following steps:
(1) steel plate-fiber concrete combination type component 14 is made: first weld grid stiffener 5 at steel bridge deck 13 two ends of monolithic, the outside of the outside of grid stiffener 5 and steel bridge deck 13 reserves space, then at the external coating preservative of steel bridge deck 13 and grid stiffener 5, simultaneously at the end face uniform welding member in shear memory of steel bridge deck 13 or arrange shearing resistance structure; Then fiber concrete is built on steel bridge deck 13 and the inner end of grating stiffener 5 obtains prefibers concrete element 4, make first longitudinal reinforcing steel bar 6 that prefibers concrete element 4 configures stretch out from its end simultaneously, obtain the steel plate with grid stiffener 5-fiber concrete combination type component 14;
(2) combined and spliced: to take two pieces by the prefabricated steel plate with the grid stiffener 5-fiber concrete combination type component 14 of step (1) method, and make it longitudinally splice along bridge, adjacent two steel bridge decks 13 being positioned at bottom are first welded during splicing, then above two steel bridge decks 13 after welding, and cast-in-place fiber concrete in the groove between two steel plate stiffeners, and make the first of configuration longitudinal reinforcing steel bar 6 in cast-in-place fiber concrete dock by connecting reinforcing bar 10 or be docked by the grid stiffener 5 of configuration in both sides prefibers concrete element 4 by second longitudinal reinforcing steel bar 6a, the first of configuration longitudinal reinforcing steel bar 6 in cast-in-place fiber concrete is made to dock by connecting reinforcing bar 10 or be docked by the grid stiffener 5 of configuration in both sides prefibers concrete element 4 by second longitudinal reinforcing steel bar 6a, obtain cast-in-place fiber concrete part 3, complete the combined and spliced of adjacent two block plates-fiber concrete combination type component 14,
(3) assembling successively is repeated: each block plate-fiber concrete combination type component 14 is also longitudinally assembled docking along bridge according to segmental construction method by the operation of repeat the above steps (2) successively, form overall, continuous print steel bridge deck layer 1 and fiber concrete layer 2, the last end face at fiber concrete layer 2 is roughened formation road surfaces or overlays wearing course 8 above fiber concrete layer 2, and wearing course 8 is carried out maintenance, complete the construction of combined bridge deck structure.
In the construction method of the invention described above, the construction of fiber concrete layer 2 is to adopt the cast-in-place and prefabricated fabricated construction mode combined, the faying face place combined due to cast-in-place and pre-erection is disconnected the seriality of fiber concrete by artificial mode, its faying face place tensile strength becomes very weak, in order to these two parts are effectively coupled together, and prevent docking regional stress excessive and ftracture, the construction method that present invention employs has additional grid stiffener 5 in docking region, owing to steel elastic modelling quantity is far longer than fiber concrete elastic modelling quantity, thus improve tensile strength and the rigidity at weak faying face place, reduce the stress level of seam crossing, and due to grid to the wedge action of fiber concrete and Confinement effect, greatly strengthen seam crossing fiber concrete entirety resistance to tension, and enhance anti-interlayer slip ability between seam crossing fiber concrete and steel bridge deck 13, fiber concrete is had the effect of " reinforcement ", improves the tensile strength of seam. dock to steel rod elements 52 with the vertical bridge in grid stiffener 5 additionally by by cast-in-place and pre-erection configuration longitudinal reinforcing steel bar, also improve the tensile strength of docking region fiber concrete layer 2.
Compared with prior art, it is an advantage of the current invention that:
1. the assembled steel of the present invention-fiber concrete combined bridge deck structure is a kind of can effectively to apply the combined bridge deck structure that fabricated construction mode carries out constructing, the advantage that the combined bridge deck structure of the present invention makes full use of packaged type bridges form of construction work, can not only effectively shorten the construction period, reduce production cost, improve construction quality, and the adverse effect that construction environment is likely to bring can be reduced, the installation of component is simple, easy construction.
2. the assembled steel of the present invention-fiber concrete combined bridge deck structure is mainly by fiber concrete layer 2 and the common stress of steel bridge deck layer 1, owing to have employed assembly construction method, the combined bridge deck structure of the present invention have employed grid stiffener 5 especially, this grid stiffener 5 includes vertical direction across bridge steel rod elements 51 especially, this special structural design reduces joint location steel bridge deck 13 and rib stress under vehicle wheel load in length and breadth thereof, greatly strengthen anti-interlayer slip ability between seam crossing fiber concrete and steel bridge deck 13, and fiber concrete is had the effect of " reinforcement " and " cuff ", significantly reduce the risk of fiber concrete seam 11 cracking.
Generally speaking, the present invention by arranging grid stiffener 5 in assembled steel-fiber concrete combined bridge deck structure (especially Orthotropic Steel Bridge Deck 13 combinative structure), the advantage making fabricated construction technique is able to fully, effectively brings into play, this not only facilitates constructing operation, provide efficiency of construction, and be more beneficial for ensureing the construction quality of combined bridge deck structure. From practical application effect, the combined bridge deck structure of the present invention does not change the general thickness of bridge deck structure, greatly strengthen anti-interlayer slip ability between seam crossing fiber concrete and steel bridge deck 13, and fiber concrete is had the effect of " reinforcement " and " cuff ", local strength and the rigidity of combined bridge deck structure can be effectively improved, reduce seam crossing stress level, effectively prevent the generation in seam crossing crack. There is great practical value and good economic benefit, the construction particularly in steel bridge large-scale, super-huge has broad application prospects.
The above is only the preferred embodiment of the present invention; it should be pointed out that, for those skilled in the art, under the premise without departing from the principles of the invention; can also making some improvements and modifications, these improvements and modifications also should be regarded as protection scope of the present invention.
Claims (9)
1. the assembled combined bridge deck structure with grating type joint, described combined bridge deck structure includes at least two block plates-fiber concrete combination type component and is assembled; Described steel plate-fiber concrete combination type component includes the steel bridge deck being positioned at bottom and the prefibers concrete element built on steel bridge deck; It is characterized in that: the docking region of adjacent two blocks of described steel plates-fiber concrete combination type component is provided with grating type joint; Described grating type joint includes cast-in-place fiber concrete part and the grid stiffener being consolidated on steel bridge deck; Described grid stiffener is coated with the cast-in-place fiber concrete part being positioned at described docking region completely by the prefibers concrete element being arranged in both sides, described docking region, and described prefibers concrete element and cast-in-place fiber concrete part connect and compose the fiber concrete layer of entirety by described grid stiffener; Two pieces of adjacent described steel bridge decks connect the fixing steel bridge deck layer forming entirety; At least one end, the two ends of every piece of steel bridge deck is connected with a grid stiffener, described grid stiffener is connected with the prefibers concrete element in steel plate-fiber concrete combination type component along the side that bridge is longitudinal in build-in mode, and described grid stiffener is connected with described cast-in-place fiber concrete part along the opposite side that bridge is longitudinal in build-in mode.
2. the assembled combined bridge deck structure with grating type joint as claimed in claim 1, it is characterised in that: the fiber concrete seam of described prefibers concrete element and described cast-in-place fiber concrete part is arranged on the top of described grid stiffener.
3. the assembled combined bridge deck structure with grating type joint as claimed in claim 1, it is characterized in that: being configured with in described steel plate-fiber concrete combination type component along bridge longitudinal extension and run through first longitudinal reinforcing steel bar of described steel bridge deck and be connected to the longitudinal reinforcing steel bar of second between grid stiffener, the docking region of adjacent two blocks of described steel plates-fiber concrete combination type component is provided with connection reinforcing bar; By connecting steel reinforcement abutting joints connection between described first longitudinal reinforcing steel bar.
4. the assembled combined bridge deck structure with grating type joint as claimed in claim 1, it is characterised in that: described gridiron structure includes intersecting the vertical bridge that connects to steel rod elements and direction across bridge steel rod elements; Described direction across bridge steel rod elements be installed in described vertical bridge above steel rod elements or described direction across bridge steel rod elements be located in described vertical bridge on steel rod elements and described direction across bridge steel rod elements and vertical bridge be connected to steel rod elements is fixing.
5. the assembled combined bridge deck structure with grating type joint as claimed in claim 1, it is characterised in that: the top of described fiber concrete layer is covered with wearing course.
6. the assembled combined bridge deck structure with grating type joint as claimed in claim 1, it is characterised in that: the faying face place of described steel bridge deck layer and described fiber concrete layer is provided with shear structure.
7. the assembled combined bridge deck structure with grating type joint as claimed in claim 1, it is characterised in that: described prefibers concrete element and cast-in-place fiber concrete part are mainly built by one or several of RPC, very-high performance fibre reinforced concrete and slip casting fiber concrete and are formed.
8. the construction method of the assembled combined bridge deck structure with grating type joint as claimed in claim 3, it is characterised in that comprise the following steps:
S1 makes steel plate-fiber concrete combination type component:
A, being respectively welded stationary grizzly stiffener at steel bridge deck two ends, the outside of described grid stiffener reserves, with the outside of described steel bridge deck, the space docking region;
B, the inner side of grid stiffener is docked be located on steel bridge deck second longitudinal reinforcing steel bar, and lay first longitudinal reinforcing steel bar, be uniformly arranged shear structure at the end face of steel bridge deck simultaneously;
C, fiber concrete is built on described steel bridge deck and covered the space except docking region obtain prefibers concrete element, first longitudinal reinforcing steel bar stretches out from the end of prefibers concrete element, prepares the steel plate-fiber concrete combination type component with grid stiffener;
The combined and spliced steel plate of S2-fiber concrete combination type component:
A, take two pieces by the prefabricated steel plate with the grid stiffener-fiber concrete combination type component of step (1) method, and make two block plates-fiber concrete combination type component along the longitudinally-aligned abutting of bridge, form docking region;
B, first welding are positioned at adjacent two steel bridge decks bottom territory, docking area, are then welded to connect with grid stiffener by be located in docking region second longitudinal reinforcing steel bar, and are connected with connecting reinforcement welding in docking region by first longitudinal reinforcing steel bar;
C, toward docking region in build fiber concrete, complete the combined and spliced of adjacent two block plates-fiber concrete combination type component;
S3 repeats assembling successively: steel plate-fiber concrete combination type component is also longitudinally assembled docking successively according to segmental construction method by the operation of repeat the above steps (2) along bridge, forms overall, continuous print steel bridge deck layer and fiber concrete layer;
S4 is roughened formation road surfaces at the end face of described fiber concrete layer or overlays wearing course above described fiber concrete layer, completes the construction of the assembled combined bridge deck structure with grating type joint.
9. construction method as claimed in claim 8, it is characterised in that the external coating of the steel bridge deck described in step S1 and grid stiffener has preservative.
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Application publication date: 20160608 |