CN109267470A - A kind of assembled type steel-concrete preflex composite continuous bridge and its construction method - Google Patents
A kind of assembled type steel-concrete preflex composite continuous bridge and its construction method Download PDFInfo
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- CN109267470A CN109267470A CN201811232297.9A CN201811232297A CN109267470A CN 109267470 A CN109267470 A CN 109267470A CN 201811232297 A CN201811232297 A CN 201811232297A CN 109267470 A CN109267470 A CN 109267470A
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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
- E01D1/00—Bridges in general
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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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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D2101/00—Material constitution of bridges
- E01D2101/20—Concrete, stone or stone-like material
- E01D2101/24—Concrete
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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
- E01D2101/00—Material constitution of bridges
- E01D2101/30—Metal
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- Civil Engineering (AREA)
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- Bridges Or Land Bridges (AREA)
Abstract
The present invention relates to a kind of assembled type steel-concrete preflex composite continuous bridge and its construction methods, the pier top of the type steel-concrete preflex composite continuous bridge uses fashioned iron-ultra-high performance concrete combination beam, and apply prestressing force by the way of pre-bending girder steel, span centre uses fashioned iron-normal concrete combination beam, and the landing edge of Prebending type steel combination beam and plain edition steel combination beam is placed among spanning.The present invention achievees the purpose that reduce deck-molding, to expand the applicable across footpath of shape steel-concrete combined beam bridge using the method optimizing continuously set up the Bending Moment Distribution of shape steel-concrete combined beam.Compared with prior art, the present invention reduces the rise-span ratio of prefabrication and assembly construction bridge under the premise of assembly rate is maximized, reduces the project amount of substructure, has very big economic benefit.
Description
Technical field
The present invention relates to science of bridge building fields, more particularly, to a kind of assembled type steel-concrete preflex composite continuous beam
Bridge.
Background technique
Packaged type bridges mainly have cored slab, small box girder, T beam, steel-concrete composite beam etc. at present.The bridge of these forms
Beam common " first freely-supported, rear continuous " or the mode of " first freely-supported, rear bridge floor are continuous " guarantee the continuity of bridge floor.This make across
The design of middle moment of flexure control deck-molding, therefore the rise-span ratio of current prefabrication and assembly construction bridge is larger, causes certain waste of material.Type
Steel combination beam bridge is because fashioned iron specification intrinsic at present limits, so that shaped steel combination depth of beam is restricted, to limit
The span scope of application of shaped steel combination beam bridge.
Summary of the invention
The object of the invention is in order to overcome the above-mentioned problems of the prior art and to provide a kind of assembled fashioned iron-mixed
Solidifying soil preflex composite continuous bridge, can reduce the rise-span ratio of prefabrication and assembly construction bridge.
To achieve the goals above, technical scheme is as follows: a kind of assembled type steel-concrete preflex composite company
Continuous beam bridge, it is characterised in that the beam bridge is spliced by several segments precast beam, and adjacent two sections of precast beams have just been connect by longitudinal
Head connection, and it is longitudinal just connect joint be located at span centre away from 0.2 ~ 0.3L of pier top at, across footpath of the L between adjacent bridge pier, and
It is prefabricated fashioned iron-ultra-high performance concrete Pre-bent Combination Beam that the precast beam, which is located at pier top section,.
Further, the beam bridge is spliced including bridge in first bridge, several segments and tail bridge, wherein first bridge
Including end bay section, pier top section and longitudinal just connector, wherein end bay section uses prefabricated fashioned iron-normal concrete combination beam, pier top
The prefabricated fashioned iron of Duan Caiyong-ultra-high performance concrete Pre-bent Combination Beam；Middle bridge include span centre section, pier top section and be located at middle bridge two
The just connector in the longitudinal direction at end, wherein span centre section is prefabricated fashioned iron-normal concrete combination beam, and pier top section is surpassed using prefabricated fashioned iron-
High performance concrete Pre-bent Combination Beam；Tail bridge includes end bay section and longitudinal just connector, and end bay section is common using prefabricated fashioned iron-
Concrete combination beam；Prefabricated fashioned iron-ultra-high performance concrete Pre-bent Combination Beam floorings use prestressing force very-high performance coagulation
Native floorings；Prefabricated fashioned iron-normal concrete combination beam floorings use normal concrete floorings.
Further, normal concrete here be with ultra-high performance concrete in contrast, be commonly referred to as C40-
C60 concrete.
Further, pass through between the end bay section and pier top section and the span centre section and pier top section of middle bridge of the first bridge
Fashioned iron links into an integrated entity, or is connected by longitudinal just connector.
Further, the length of the ultra-high performance concrete floorings of pier top section along longitudinal direction be pier top two sides each 0.1 ~
The across footpath of 0.15L, L between adjacent bridge pier applies prestressing force to ultra-high performance concrete using pre-bending girder steel, while to pier
The steel beam web plate and bottom plate pushed up within the scope of each 0.1 ~ 0.15L in two sides wraps up C40-C60 concrete.
Further, just connector is connected by high-strength bolt for the longitudinal direction.
Further, the girder steel of end bay section, pier top section and middle bridge uses rolled section steel.
Another object of the present invention is to provide a kind of construction parties of assembled steel-concrete preflex composite continuous bridge
Method can reduce the rise-span ratio of prefabrication and assembly construction bridge.
To achieve the goals above, technical scheme is as follows: a kind of assembled steel-concrete preflex composite is continuous
The construction method of beam bridge, it is characterised in that the construction method the following steps are included:
A, prefabricated first bridge, middle bridge and tail bridge, wherein first bridge includes end bay section, pier top section and longitudinal direction just connector,
Middle end bay section uses prefabricated fashioned iron-normal concrete combination beam, and pier top section uses prefabricated fashioned iron-ultra-high performance concrete pre-bending group
Close beam；Middle bridge includes span centre section, pier top section and longitudinal just connector, and wherein span centre section is prefabricated fashioned iron-normal concrete group
Beam is closed, pier top section uses prefabricated fashioned iron-ultra-high performance concrete Pre-bent Combination Beam；Tail bridge includes that end bay section and longitudinal direction have just connect
Head, end bay section use prefabricated fashioned iron-normal concrete combination beam；Prefabricated fashioned iron-ultra-high performance concrete Pre-bent Combination Beam bridge
Panel uses prestressing force ultra-high performance concrete floorings；Prefabricated fashioned iron-normal concrete combination beam floorings are using common
Concrete slab；
B, first bridge is set up, and the pier top section of first bridge is made to be located at pier top position；
C, set up by cross it is remaining respectively across middle bridge, and the pier top section of middle bridge is made to be located at pier top position, it is next across having set up
Cheng Houyu upper one across girder steel be connected by screw bolts, by this step set up until finally, last across using tail bridge therewith
Preceding erection beam section is attached；
D, the concrete slab of field joint section is laid with using prefabricated board；
E, each Pre-bent Combination Beam of lateral connection forms preflex composite beam bridge；
F, it completes to mat formation, the construction of the affiliated facilities such as railing.
Specifically, according to one embodiment of present invention, prefabricated middle bridge may comprise steps of in step A:
Step 1: formation length is the H profile steel girder steel of L, camber is equipped within the scope of the 0.5L of H profile steel one end；
Step 2: the H profile steel beam that two leaf length are L is equipped with the beam-ends bolt that encircles in advance, temporarily affixed connection, formation length are
The girder steel of 2L, at each 0.45L in connecting node two sides be arranged fulcrum, length 2L girder steel both ends be arranged reaction frame, reaction frame and
Jack is placed between girder steel；
Step 3: jack, carries out pre-bending to the H profile steel beam of a length of 2L formed by connection, apart from connecting node
Ultra-high performance concrete is poured in the range of 0.lL ~ 0.4L to form floorings and use steam curing, after intensity is up to standard, is put and is opened
Girder steel releases interim connection；
Step 4: the upper limb of girder steel rest part pours C50 concrete and supports other than girder steel both ends along longitudinal direction 0.1L range
Shield forms normal concrete floorings, and the steel beam web plate and bottom plate below ultra-high performance concrete floorings wrap up C50 coagulation
Soil simultaneously conserves, and ultimately forms the middle bridge that length is L.
Specifically, according to another embodiment of the invention, prefabricated middle bridge may comprise steps of in step A:
Step 1: formation length is the H profile steel girder steel of 0.5L, the fashioned iron of part 0.5L is equipped with camber；
Step 2: the girder steel to a length of 0.5L for setting camber carries out pre-bending, top plate pours the superelevation of longitudinal length about 0.3L
Energy concrete forms floorings and uses steam curing, after intensity is up to standard, puts Zhang Gangliang, forms pier top section；
Step 3: the girder steel for a length of 0.5L for not setting pre- arch and prefabricated pier top section are attached with bolt.
Step 4: the upper limb of girder steel rest part pours other than not pouring within the scope of girder steel both ends along longitudinal direction 0.1L
C50 concrete simultaneously conserves and forms floorings, and steel beam web plate below ultra-high performance concrete floorings and bottom plate package C50 are mixed
Solidifying soil simultaneously conserves, and ultimately forms the span centre beam of a length of L.
It is characteristic of the invention that the landing edge position of each precast beam is arranged in span centre at bridge pier center line 0.25L,
After i.e. each hoisting prefabricated beam section has 0.75L to connect with the 0.25L of upper bridge section and to form bridge, have the length of 0.25L across
Bridge pier enter it is next across, and so on.The present invention is using the method optimizing continuously set up the moment of flexure of shape steel-concrete combined beam
Distribution achievees the purpose that reduce deck-molding, to expand the applicable across footpath of shape steel-concrete combined beam bridge.Pier top section girder steel package
Concrete increases pier top rigidity and advanced optimizes Bending Moment Distribution, and increased concrete enhances the shearing resistance at pier top again and resists
Curved bearing capacity, to further increase the applicable across footpath of fashioned iron；Pier top section floorings adopt ultra-high performance concrete and using pre-bendings
Technology applies prestressing force, reduces hogging moment area crack, not only increases structure durability and also ensures the rigidity of pier top and does not occur
Reduction.Compared with prior art, the present invention reduces the rise-span ratio of prefabrication and assembly construction bridge under the premise of assembly rate is maximized, subtracts
The project amount of substructure is lacked, there is very big economic benefit.
Detailed description of the invention
Fig. 1 is that " the middle bridge " of the assembled type steel-concrete preflex composite continuous bridge in the embodiment of the present invention 1 is vertical
Face schematic diagram；
Fig. 2 is " first bridge " cross section of the assembled type steel-concrete preflex composite continuous bridge in the embodiment of the present invention 1
Schematic diagram；
Fig. 3 is " tail bridge " signal of the assembled type steel-concrete preflex composite continuous bridge in the embodiment of the present invention 1
Figure；
Fig. 4 is " pier top section " cross section of the assembled type steel-concrete preflex composite continuous bridge in the embodiment of the present invention 1
Schematic diagram；
Fig. 5 is " span centre section " signal of the assembled type steel-concrete preflex composite continuous bridge in the embodiment of the present invention 1
Figure；
Fig. 6 is the production of " the middle bridge " of the assembled type steel-concrete preflex composite continuous bridge in the embodiment of the present invention 1
Method schematic diagram；
Fig. 7 is the pre-bending of " the middle bridge " of the assembled type steel-concrete preflex composite continuous bridge in the embodiment of the present invention 1
Process schematic representation；
Fig. 8 be the assembled type steel-concrete preflex composite continuous bridge in the embodiment of the present invention 1 scene along bridge to erection
Step schematic diagram.
Fig. 9 is that " the middle bridge " of the assembled type steel-concrete preflex composite continuous bridge in the embodiment of the present invention 2 is vertical
Face schematic diagram；
Figure 10 is that " the first bridge " of the assembled type steel-concrete preflex composite continuous bridge in the embodiment of the present invention 2 is cross-section
Face schematic diagram；
Figure 11 is " tail bridge " signal of the assembled type steel-concrete preflex composite continuous bridge in the embodiment of the present invention 2
Figure；
Figure 12 is that " the pier top section " of the assembled type steel-concrete preflex composite continuous bridge in the embodiment of the present invention 2 is cross-section
Face schematic diagram；
Figure 13 is " span centre section " signal of the assembled type steel-concrete preflex composite continuous bridge in the embodiment of the present invention 2
Figure；
Figure 14 is the system of " the middle bridge " of the assembled type steel-concrete preflex composite continuous bridge in the embodiment of the present invention 2
Make method schematic diagram；
Figure 15 be the assembled type steel-concrete preflex composite continuous bridge in the embodiment of the present invention 2 scene along bridge to frame
If step schematic diagram.
In figure, 1- pier top section ultra-high performance concrete floorings, 2-H fashioned iron girder steel, 3- C50 concrete slab, 4-
Pier top section, 5- span centre section, 6- end bay section, 61- in-situ precast concrete slab or cast-in-place connector, 7- bridge pier, 21- pier top section package are mixed
Solidifying soil, 8- jack top lift, 9- reaction frame, 10- support pier, 11- encircle girder steel, 12-0.5L girder steel, 13- 0.75L steel in advance
Beam.
Specific embodiment
The present invention is described in detail with specific embodiment below in conjunction with the accompanying drawings.
Embodiment 1
A kind of novel assembled type steel-concrete preflex composite continuous bridge, by taking 4*40m continuous bridge as an example.Its girder packet
Include " pier top section ", " span centre section ", " end bay section " and just connector.It is characterized in that the top plate of " pier top section " is mixed using very-high performance
Solidifying soil simultaneously applies prestressing force.The concrete slab of " span centre section " uses common C50 concrete.Connector is in spanning 0.25L=10m
Locate, the concrete slab on rigid connector uses prefabricated board.The girder steel of " pier top section ", " span centre section " and " end bay section " is using rolling
Fashioned iron.
Further, the length of the ultra-high performance concrete floorings of " the pier top section " along longitudinal direction is that pier top two sides are each
Across footpath of the 0.15L=6m(L between adjacent bridge pier) use pre-bending girder steel to apply prestressing force to ultra-high performance concrete.
It is prefabrication link first, which is divided into following four step:
Step 1: it is across footpath between adjacent bridge pier that formation length, which is L=40m(L), the H profile steel of 0.75L=30m and 1.25L=50m
Girder steel is equipped with camber within the scope of the 0.5L=20m of H profile steel one end.
Step 2: the H profile steel beam that two leaf length are L is equipped with the beam-ends bolt temporarily affixed connection encircleed in advance, length is formed
Degree is the girder steel of 2L=80m, and fulcrum is arranged at each 0.45L=18m in connecting node two sides, and counter-force is arranged at length 2L girder steel both ends
Frame places jack between reaction frame and girder steel.
Step 3: jack, carries out pre-bending to the H profile steel beam of a length of 2L formed by connection, connects in distance
Node 0.lL ~ 0.4L(4 ~ 16m) in the range of pour ultra-high performance concrete and form floorings and using steam curing, to intensity
After up to standard, Zhang Gangliang is put, releases interim connection.
Step 4: the upper limb of girder steel rest part pours other than not pouring within the scope of girder steel both ends along longitudinal direction 0.1L=4m
Build C50 concrete and conserve, form normal concrete floorings, steel beam web plate below ultra-high performance concrete floorings and
Bottom plate package C50 concrete simultaneously conserves, and ultimately forms " middle bridge " shaped steel combination beam that length is L=40m.Length is 1.25L
The prefabrication system of " first bridge " shaped steel combination beam of=50m is similar with " middle bridge ", and length is " the tail bridge " of 0.75L=30m
Prefabrication system is similar with the mixed prefabrication system of combination beam of common steel-.
After precast prestressed beam completes the production, the scene that can transport to is set up, and erection is broadly divided into the following steps:
Step 1: setting up " first bridge "；
Step 2: set up by cross it is remaining respectively across " middle bridge ", and it is next across after the completion of erection with upper one across girder steel use
It is bolted, is set up by this step until finally, at last across being attached using " tail bridge " with erection beam section before.
It is laid with step 3: the concrete slab of field joint section is used using prefabricated board.
Step 4: each Pre-bent Combination Beam of lateral connection forms preflex composite beam bridge.
Step 5: the construction of the affiliated facilities such as completion is mated formation, railing.
Embodiment 2
A kind of novel assembled type steel-concrete preflex composite continuous bridge, by taking 4*40m continuous bridge as an example.Its girder packet
Include " pier top section ", " span centre section ", " end bay section " and just connector.It is characterized in that the top plate of " pier top section " is mixed using very-high performance
Solidifying soil simultaneously applies prestressing force.The concrete slab of " span centre section " uses common C50 concrete.Connector is in spanning 0.25L=10m
Locate, the concrete slab on rigid connector uses prefabricated board.The girder steel of " pier top section ", " span centre section " and " end bay section " is using rolling
Fashioned iron.
Further, the length of the ultra-high performance concrete floorings of " the pier top section " along longitudinal direction is that pier top two sides are each
Across footpath of the 0.15L=6m(L between adjacent bridge pier) use pre-bending girder steel to apply prestressing force to ultra-high performance concrete.
It is prefabrication link first, which is divided into following four step:
Step 1: it is across footpath between adjacent bridge pier that formation length, which is 0.5L=20m(L) and 0.75L=30m H profile steel girder steel, portion
Camber need to be equipped with by dividing the fashioned iron of 0.5L=20m.
Step 2: carrying out pre-bending to the girder steel for a length of 0.5L=20m for setting camber, pre-bending method uses " pre-bending prestressing force
Composite beam bridge technical standard " to curved pre-bending mode, top plate pours vertical for the single-beam pre-bending that provides in CJJ/T276-2018 or twin beams
Floorings are formed to the ultra-high performance concrete of length about 0.3L=12m and Zhang Gang is put after intensity is up to standard using steam curing
Beam is formed " pier top section ".
Step 3: the girder steel for a length of 0.5L=20m for not setting pre- arch and prefabricated " pier top section " are connected with bolt
It connects.
Step 4: for the girder steel after connection, other than not poured within the scope of both ends along longitudinal direction 0.1L=4m, girder steel upper limb
It does not set to pour C50 concrete at ultra-high performance concrete and conserve and forms floorings, under ultra-high performance concrete floorings
Steel beam web plate and bottom plate the package C50 concrete of side simultaneously conserve, and ultimately form " the span centre beam " of a length of L.
For " first bridge ", in third step, the girder steel of a length of 0.75L=30m of pre- arch and prefabricated will not be set
" pier top section " is attached with bolt, in the 4th step, for the girder steel after connection, in addition to girder steel leans on that end of pier top section along longitudinal direction
It is not poured within the scope of 0.1L=4m, girder steel upper limb, which does not set to pour C50 concrete at ultra-high performance concrete and conserve, forms bridge floor
Plate, steel beam web plate and bottom plate below ultra-high performance concrete floorings wrap up C50 concrete and conserve, ultimately form a length of
" the first bridge " of 1.25L=50m.
Length is similar for the prefabrication system of " the tail bridge " of 0.75L=30m and the mixed prefabrication system of combination beam of common steel-.
After precast prestressed beam completes the production, the scene that can transport to is set up, and erection is broadly divided into the following steps:
Step 1: setting up " first bridge "；
Step 2: set up by cross it is remaining respectively across " middle bridge ", and it is next across after the completion of erection with upper one across girder steel use
It is bolted, is set up by this step until finally, at last across being attached using " tail bridge " with erection beam section before.
It is laid with step 3: the concrete slab of field joint section is used using prefabricated board.
Step 4: each Pre-bent Combination Beam of lateral connection forms preflex composite beam bridge.
Step 5: the construction of the affiliated facilities such as completion is mated formation, railing.
The above description of the embodiments is intended to facilitate ordinary skill in the art to understand and use the invention.
Person skilled in the art obviously can easily carry out various modifications the embodiment, and general original described herein
It ought to use in other embodiments without having to go through creative labor.Therefore, the present invention is not limited to the above embodiments, this field
Technical staff's announcement according to the present invention, improvement and modification made without departing from the scope of the present invention all should be in guarantors of the invention
Within the scope of shield.
Claims (9)
1. a kind of assembled type steel-concrete preflex composite continuous bridge, it is characterised in that the beam bridge is by several segments precast beam
It is spliced, adjacent two sections of precast beams are connected by longitudinal just connector, and longitudinal direction has just connect joint and has been located at span centre away from pier
It pushes up at 0.2 ~ 0.3L, across footpath of the L between adjacent bridge pier, and it is prefabricated fashioned iron-very-high performance that the precast beam, which is located at pier top section,
Concrete Pre-bent Combination Beam.
2. assembled type steel-concrete preflex composite continuous bridge according to claim 1, which is characterized in that the beam
Bridge is spliced including bridge in first bridge, several segments and tail bridge, wherein first bridge includes end bay section, pier top section and longitudinal direction
Rigid connector, wherein end bay section uses prefabricated fashioned iron-normal concrete combination beam, and pier top section uses prefabricated fashioned iron-very-high performance
Concrete Pre-bent Combination Beam；Middle bridge includes span centre section, pier top section and longitudinal just connector, and wherein span centre section is prefabricated fashioned iron-
Normal concrete combination beam, pier top section use prefabricated fashioned iron-ultra-high performance concrete Pre-bent Combination Beam；Tail bridge includes end bay section
With longitudinal just connector, end bay section uses prefabricated fashioned iron-normal concrete combination beam；Prefabricated fashioned iron-ultra-high performance concrete is pre-
The floorings of curved combination beam use prestressing force ultra-high performance concrete floorings；Prefabricated fashioned iron-normal concrete combination beam bridge
Panel uses normal concrete floorings.
3. assembled type steel-concrete preflex composite continuous bridge according to claim 1, which is characterized in that the head
The end bay section of bridge and the girder steel of pier top section use same root H profile steel, or use two H profile steels, and have just been connect by longitudinal
Head connection；And the span centre section of middle bridge and the girder steel of pier top section use same root H profile steel, or use two H profile steels, and lead to
Longitudinal just connector is crossed to connect.
4. assembled type steel-concrete preflex composite continuous bridge according to claim 1, which is characterized in that pier top section
Ultra-high performance concrete floorings length along longitudinal direction be each 0.1 ~ 0.15L in pier top two sides, L between adjacent bridge pier across
Diameter applies prestressing force to ultra-high performance concrete using pre-bending girder steel, while to the steel within the scope of each 0.1 ~ 0.15L in pier top two sides
Web and bottom plate wrap up C40-C60 concrete.
5. assembled type steel-concrete preflex composite continuous bridge according to claim 1, which is characterized in that described
Longitudinal just connector is connected by high-strength bolt.
6. assembled type steel-concrete preflex composite continuous bridge described according to claim 1 ~ 5, which is characterized in that pier top
Hot-rolled steel section is all made of with the girder steel of span centre.
7. a kind of construction method of assembled steel-concrete preflex composite continuous bridge, it is characterised in that the construction method includes
Following steps:
A, prefabricated first bridge, middle bridge and tail bridge, wherein first bridge includes end bay section, pier top section and longitudinal direction just connector,
Middle end bay section uses prefabricated fashioned iron-normal concrete combination beam, and pier top section uses prefabricated fashioned iron-ultra-high performance concrete pre-bending group
Close beam；Middle bridge includes span centre section, pier top section and longitudinal just connector, and wherein span centre section is prefabricated fashioned iron-normal concrete group
Beam is closed, pier top section uses prefabricated fashioned iron-ultra-high performance concrete Pre-bent Combination Beam；Tail bridge includes that end bay section and longitudinal direction have just connect
Head, end bay section use prefabricated fashioned iron-normal concrete combination beam；Prefabricated fashioned iron-ultra-high performance concrete Pre-bent Combination Beam bridge
Panel uses prestressing force ultra-high performance concrete floorings；Prefabricated fashioned iron-normal concrete combination beam floorings are using common
Concrete slab；
B, first bridge is set up, and the pier top section of first bridge is made to be located at pier top position；
C, set up by cross it is remaining respectively across middle bridge, and the pier top section of middle bridge is made to be located at pier top position, it is next across having set up
Cheng Houyu upper one across girder steel be connected by screw bolts, by this step set up until finally, last across using tail bridge therewith
Preceding erection beam section is attached；
D, the concrete slab of field joint section is laid with using prefabricated board；
E, each Pre-bent Combination Beam of lateral connection forms preflex composite beam bridge；
F, it completes to mat formation, the construction of the affiliated facilities such as railing.
8. construction method according to claim 7, which is characterized in that prefabricated middle bridge in step A the following steps are included:
Step 1: formation length is the H profile steel girder steel of L, camber is equipped within the scope of the 0.5L of H profile steel one end；
Step 2: the H profile steel beam that two leaf length are L is equipped with the beam-ends bolt that encircles in advance, temporarily affixed connection, formation length are
The girder steel of 2L, at each 0.45L in connecting node two sides be arranged fulcrum, length 2L girder steel both ends be arranged reaction frame, reaction frame and
Jack is placed between girder steel；
Step 3: jack, carries out pre-bending to the H profile steel beam of a length of 2L formed by connection, apart from connecting node
Ultra-high performance concrete is poured in the range of 0.lL ~ 0.4L to form floorings and use steam curing, after intensity is up to standard, is put and is opened
Girder steel releases interim connection；
Step 4: the upper limb of girder steel rest part pours C50 concrete and supports other than girder steel both ends along longitudinal direction 0.1L range
Shield forms normal concrete floorings, and the steel beam web plate and bottom plate below ultra-high performance concrete floorings wrap up C50 coagulation
Soil simultaneously conserves, and ultimately forms the middle bridge that length is L.
9. construction method according to claim 7, which is characterized in that prefabricated middle bridge in step A is the following steps are included: step
Prefabricated middle bridge may comprise steps of in rapid A:
Step 1: formation length is the H profile steel girder steel of 0.5L, the fashioned iron of part 0.5L is equipped with camber；
Step 2: the girder steel to a length of 0.5L for setting camber carries out pre-bending, top plate pours the superelevation of longitudinal length about 0.3L
Energy concrete forms floorings and uses steam curing, after intensity is up to standard, puts Zhang Gangliang, forms pier top section；
Step 3: the girder steel for a length of 0.5L for not setting pre- arch and prefabricated pier top section are attached with bolt；
Step 4: it is mixed that the upper limb of girder steel rest part pours C50 other than not pouring within the scope of girder steel both ends along longitudinal direction 0.1L
Solidifying native and maintenance forms floorings, and the steel beam web plate and bottom plate below ultra-high performance concrete floorings wrap up C50 concrete
And conserve, ultimately form the span centre beam of a length of L.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201811232297.9A CN109267470A (en) | 2018-10-22 | 2018-10-22 | A kind of assembled type steel-concrete preflex composite continuous bridge and its construction method |
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| CN201811232297.9A CN109267470A (en) | 2018-10-22 | 2018-10-22 | A kind of assembled type steel-concrete preflex composite continuous bridge and its construction method |
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| CN109267470A true CN109267470A (en) | 2019-01-25 |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110258353A (en) * | 2019-07-31 | 2019-09-20 | 河南省交通规划设计研究院股份有限公司 | And of Varying Depth steel-concrete composite beams bridge construction technique with support |
| CN111778842A (en) * | 2020-08-13 | 2020-10-16 | 同济大学 | Connecting structure of steel plate beam |
| CN112411354A (en) * | 2020-11-25 | 2021-02-26 | 广州市市政工程设计研究总院有限公司 | Bolt welding type combined continuous beam among segments and construction method thereof |
| CN112458878A (en) * | 2020-11-25 | 2021-03-09 | 广州市市政工程设计研究总院有限公司 | Segmental assembling steel-concrete combined continuous beam and construction method thereof |
| CN112482193A (en) * | 2020-11-18 | 2021-03-12 | 中铁大桥勘测设计院集团有限公司 | Method for applying compressive stress to concrete slab in hogging moment area of combination beam, main beam and cable-stayed bridge |
| CN113802450A (en) * | 2021-08-16 | 2021-12-17 | 中国建筑股份有限公司 | Steel concrete composite beam structure and construction method |
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2018
- 2018-10-22 CN CN201811232297.9A patent/CN109267470A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110258353A (en) * | 2019-07-31 | 2019-09-20 | 河南省交通规划设计研究院股份有限公司 | And of Varying Depth steel-concrete composite beams bridge construction technique with support |
| CN111778842A (en) * | 2020-08-13 | 2020-10-16 | 同济大学 | Connecting structure of steel plate beam |
| CN111778842B (en) * | 2020-08-13 | 2024-11-05 | 同济大学 | Connection structure of steel plate girder |
| CN112482193A (en) * | 2020-11-18 | 2021-03-12 | 中铁大桥勘测设计院集团有限公司 | Method for applying compressive stress to concrete slab in hogging moment area of combination beam, main beam and cable-stayed bridge |
| CN112411354A (en) * | 2020-11-25 | 2021-02-26 | 广州市市政工程设计研究总院有限公司 | Bolt welding type combined continuous beam among segments and construction method thereof |
| CN112458878A (en) * | 2020-11-25 | 2021-03-09 | 广州市市政工程设计研究总院有限公司 | Segmental assembling steel-concrete combined continuous beam and construction method thereof |
| CN113802450A (en) * | 2021-08-16 | 2021-12-17 | 中国建筑股份有限公司 | Steel concrete composite beam structure and construction method |
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