CN110219235A - A kind of full precast assembly structural bridge and its construction method suitable for grassland wetland - Google Patents
A kind of full precast assembly structural bridge and its construction method suitable for grassland wetland Download PDFInfo
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- CN110219235A CN110219235A CN201910585261.7A CN201910585261A CN110219235A CN 110219235 A CN110219235 A CN 110219235A CN 201910585261 A CN201910585261 A CN 201910585261A CN 110219235 A CN110219235 A CN 110219235A
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- 238000010276 construction Methods 0.000 title claims abstract description 46
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- 229910000831 Steel Inorganic materials 0.000 claims description 6
- 239000010959 steel Substances 0.000 claims description 6
- 230000002787 reinforcement Effects 0.000 claims description 5
- 239000002131 composite material Substances 0.000 claims description 4
- 239000011513 prestressed concrete Substances 0.000 claims description 3
- 230000003014 reinforcing effect Effects 0.000 claims description 2
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- 239000011178 precast concrete Substances 0.000 description 1
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Classifications
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D18/00—Bridges specially adapted for particular applications or functions not provided for elsewhere, e.g. aqueducts, bridges for supporting pipe-lines
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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
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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
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/22—Piles
- E02D5/58—Prestressed concrete piles
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Abstract
The invention discloses a kind of full precast assembly structural bridges and its construction method suitable for grassland wetland, including several prefabricated bent caps, several linear distributing notches are set on the prefabricated bent cap, two jacks are set in each notch, the axis of two jacks is respectively tilted to the two opposite outer of prefabricated bent cap from top to bottom, it is inserted into the prefabricated tubular pile to match in each jack, is fixed between the top of the prefabricated tubular pile and corresponding jack by cast-in-place concrete；Two neighboring prefabricated bent cap upper berth sets superstructure, and the superstructure is prefabricated small box girder or Prefabricated superposed beam.Restriction problem of the problems such as present invention is to solve high effective short time limit of the regional year of grassland wetland in the prior art, earthquake intensity, ecology fragility to traffic network construction, realization avoids conventional piles hole pouring pile basis to the pollution of lithic drainage, reduces the purpose of the influence of the higher grassland Wetland Environment of environmentally sensitive property.
Description
Technical field
The present invention relates to field of civil engineering, and in particular to a kind of full precast assembly structural bridge suitable for grassland wetland
And its construction method.
Background technique
Western part of China transportation network builds the stage for entering " assaulting fortified position ".Will such as build " (Gansu) control long-
Sichuan-Tibet highway etc. in (Sichuan) Maerkang " highway and planning have a large amount of sections need to pass through with " high and cold ",
The North-West Sichuan snow-capped mountains and marshlands wetland Region of the distinguishing features such as " high earthquake intensity ", " ecology fragility ", " aqueous development ".
Grassland wetland Region basis soft base is thicker, need to fill according to the mode of Special Roadbed disposition to carry out road performance
The roadbed of big depth high roadbed, cost will be higher, and quality monitoring is difficult, and the roadbed later period is also easy to produce differential settlement.Simultaneously
The roadbed land occupation of build is larger, and channel is rare, will separate both sides of the road traffic, local ground watering system, wild animal are migrated
It is larger with the influence of local farmers' life.
High-fill roadbed scheme is compared, road is carried out in the region according to the Bridge alternatives that substructure is pile foundation and builds
If will have many advantages, such as land occupation less, the disease caused by reasons such as posterior settlement deformation is small, under bridge can be interconnection.But it is existing
Conventional Bridge alternatives still need to soft base carry out proper treatment construction meet the construction time transport builder's road, bridge top and the bottom
The structure construction duration is relatively long, and it is dirty that cost is still higher, lower boreholes poured pile base construction still will cause certain environment
Dye.
Pile for prestressed pipe be it is a kind of by specialized factory using pretensioned prestressing technique and centrifugal forming, steam curing forms
The prefabricated novel foundation pile of elongated hollow cross-section.Compared with traditional cast-in-situ bored pile, pile for prestressed pipe has reliable in quality,
The advantages that construction period is short, and bearing capacity is high, cost economic, management facilitates, at home and abroad, citizen builds field acquisition extensively at present
General application.But its disadvantages of there is also selectable Pile Diameter range is smaller, and the anti-horizontal shear bearing capacity of pile foundation is weaker,
At present using less in the science of bridge building of science of bridge building especially high intensity Zone.
Summary of the invention
The purpose of the present invention is to provide a kind of full precast assembly structural bridges and its construction party suitable for grassland wetland
Method, to traffic the problems such as to solve high grassland wetland regional year effective short time limit, earthquake intensity in the prior art, ecology fragility
The restriction problem of road network construction, realization avoid pollution of the conventional piles hole pouring pile basis to lithic drainage, reduce environmentally sensitive
The purpose of the influence of the higher grassland Wetland Environment of property.
The present invention is achieved through the following technical solutions:
A kind of full precast assembly structural bridge suitable for grassland wetland, including several prefabricated bent caps, the prefabricated bent cap
It is upper that several linear distributing notches are set, two jacks are set in each notch, the axis of two jacks is each from top to bottom
It is tilted to the two opposite outer of prefabricated bent cap, is inserted into the prefabricated tubular pile to match in each jack, the prefabricated tubular pile
It is fixed between top and corresponding jack by cast-in-place concrete；Two neighboring prefabricated bent cap upper berth sets superstructure, it is described on
Portion's structure is prefabricated small box girder or Prefabricated superposed beam.
The problems such as effective short time limit of the regional year of grassland wetland in the prior art, earthquake intensity height, ecology fragility, is to friendship
The restriction problem of access net construction, the present invention propose a kind of full precast assembly structural bridge suitable for grassland wetland, bent cap,
Tubular pole and superstructure carry out prefabricated, are assembled at the scene.Wherein, bent cap is according to bridge width, using whole picture
Or striping criterionization is prefabricated, what is reserved when prefabricated connects hole with matched reserve of tubular pole size, quickly splices at the scene with tubular pole.
The top of prefabricated tubular pile is inserted into the jack on bent cap.Several linear distributing notches, each slot are set on prefabricated bent cap
Two jacks are all set in mouthful, and the axis of two jacks is respectively tilted to the two opposite outer of prefabricated bent cap from top to bottom, therefore
After being inserted into two prefabricated tubular piles, the super two sides tilt distribution of two root canal piles certainty, to adapt to the water of highlight lines area bridge foundation
It puts down to resist and pushes away ability need.Simultaneously because there are two prefabricated tubular piles to carry out slanting support in each notch, can significantly improve pre-
Enabling capabilities of the tubulation stake to prefabricated bent cap and superstructure.Bridge substructure, superstructure in the application are all made of dress
Precast construction with formula, is spliced at the scene, and live pouring is intended merely to play connection function, therefore compared to existing
The mode of pile at the scene completely in technology, significantly reduces the pile foundation construction period, realizes and improve soft clay area routine bridge
Construction speed reduces project cost, promotes the effect of bridge industrialization degree；Simultaneously because without live high-fill roadbed or
To pile foundation carry out treatment of soft foundation, therefore local lithic drainage, wild animal are migrated, the influence of farmers' life it is smaller, can
Effectively reduce the influence of the higher grassland Wetland Environment of environmentally sensitive property.
Further, the top surface of the prefabricated bent cap is rectangle, and several notches on prefabricated bent cap are along rectangular length
Axis is distributed, and two jacks in each notch are tilted towards rectangular long axis two sides.The long axis of prefabricated bent cap theoretically perpendicular to
The length direction of bridge, therefore notch is set and is distributed along rectangular long axis, it is ensured that the bearing capacity stable to superstructure.
Two jacks in each notch are tilted towards rectangular long axis two sides, so that entire bridge structure is able to maintain in the longitudinal direction
High stability.
Further, step is set in the jack, and the prefabricated tubular pile can not pass through the step from bottom to top.Due to
First to squeeze into prefabricated tubular pile when this structure construction, then hoisting prefabricated bent cap, therefore the top of prefabricated tubular pile can from jack bottom by
It is gradually inserted into, for the ease of the insertion depth to prefabricated tubular pile, i.e., the lowered position of prefabricated bent cap is positioned, and is set in through-hole
Step is set, when the step is arrived at the top of prefabricated tubular pile, prefabricated bent cap can not continue to transfer, and transfer at this time in place, prefabricated
Bent cap is placed on the top of prefabricated tubular pile by the step in each jack, then carries out subsequent pour and fix, and then is significant
Property easy for construction of the invention is improved, difficulty of construction is reduced.
Preferably, the angle between the axis and plumb line of the prefabricated tubular pile is 5~10 °.
Preferably, the prefabricated bent cap is integral prefabricated or separate prefabricated；When prefabricated bent cap is separate prefabricated, adjacent two
/ connected by wet seam.The size of prefabricated bent cap specifically determines according to field condition, if prefabricated bent cap size is smaller,
It then can be integral prefabricated, it is ensured that scene quickly splicing；If the size of prefabricated bent cap is larger, separate prefabricated, connect at the scene by wet
Joint stabilizing process is attached.
Further, the prefabricated tubular pile is hybrid reinforcement prefabricated prestressing pipe pile, and the prefabricated small box girder is prestressing force
Concrete small box girder, the Prefabricated superposed beam are prefabricated I-shaped steel plate composite beam.
A kind of construction method of the full precast assembly structural bridge suitable for grassland wetland, comprising the following steps:
(a) according to geographic and geomorphic conditions, conjunctive path demand, wiring position layout scheme is determined；Consider bridge pier stress, piling
Technique and economy determine the type and size of bridge superstructure；Production prefabricated tubular pile, prefabricated bent cap, superstructure are simultaneously transported
It send to scene；
(b) ground is laid with loading plate at the scene, provides the running lanes of piling machine and crane；Piling machine is run at stake position
Inserting piling prefabricated tubular pile；
(c) after having beaten all pile foundations of first and second bridge pier, prefabricated bent cap is installed, be poured prefabricated bent cap with it is corresponding
Prefabricated tubular pile between connector, complete the first hole Bridge Pier Construction, then between first and second bridge pier set up first across
Superstructure；
(d) phloem-xylem transport channel of the superstructure set up as prefabricated tubular pile, prefabricated bent cap and superstructure, will be pre-
Tubulation stake, prefabricated bent cap and superstructure are transported forward in place；Loading plate lifting is advanced at third bridge pier stake position, is moved forward
Piling machine and crane；
(e) pile foundation for squeezing into third bridge pier installs prefabricated bent cap, is poured between prefabricated bent cap and corresponding prefabricated tubular pile
Connector, complete the second hole Bridge Pier Construction, then between second and third bridge pier erection second across superstructure；
(f) step (d)~(e) is repeated, upper and lower part longitudinally simultaneously advances until completing construction.
This method is using the hybrid reinforcement driving into type prefabricated tubular pile that is in tilted layout as bridge foundation, to adapt to highlight lines area
The level of bridge foundation is anti-to push away ability need.Prefabricated bent cap is prefabricated using whole picture or striping criterionization according to bridge width, in advance
What is reserved when processed connects hole with matched reserve of tubular pole size, is quickly spliced at the scene with tubular pole using wet joint mode.Top knot
Structure uses economical maturity and convenient transportation precast concrete small box girder or Prefabricated superposed beam.Using assembled in place complete pre-
Bridge processed is as transport channel is by tubular pole and there are the prefabricated components such as the bent cap of pile foundation connector to transport in place.With reusable
Construction shipping platform of the loading plate as large-scale equipment, therefore the present invention can be realized the same of upper and lower part structure and each equipment
Step is pushed ahead, and the construction time is short, and construction safety risk is small, economy is good, to push grassland ecology area, especially I
The development of state, highlands, western part transportation network is significant.
Preferably, when preform lid beam width is less than or equal to 8m, use is integral prefabricated；When bent cap width is greater than 8m, use
Precast block, each piecemeal are connected by wet seam at the scene, and the width of wet seam is controlled in 40~60cm.
Preferably, the diameter of the prefabricated tubular pile is 60~80cm, the angle between the axis and plumb line of prefabricated tubular pile
It is 5~10 °.Prefabricated tubular pile uses circle or rectangular, and diameter uses 60cm-80cm, prefabricated to squeeze into mode pile, pile foundation
Exposed certain altitude is in case connect prefabricated bent cap.To adapt to highlight lines area antidetonation demand, improves tubular pole and resist horizontal force energy
Power, default 5~10 ° of the inclination angle of tubular pole, specific angle are preferred according to Force Calculation and geological conditions.
Preferably, the method for setting up superstructure is: after prefabricated bent cap is installed, the cast-in-place branch seat cushion on prefabricated bent cap
Stone, after bearing pad stone reaches intensity, erection support sets up superstructure, binding beam body and wet seam steel using Bridge Erector
Muscle.
Compared with prior art, the present invention having the following advantages and benefits:
1, a kind of full precast assembly structural bridge and its construction method, driving into type suitable for grassland wetland of the invention is prefabricated
Tubular pole avoids pollution of the conventional piles hole pouring pile basis to lithic drainage, significantly reduces quick to environment as bridge foundation
The influence of the higher grassland Wetland Environment of perception；The anti-seismic performance that pipe pile foundation is improved by predetermined inclination angle, can
Meet the needs of the regional bridge engineering construction compared with Gao Lie.
2, a kind of full precast assembly structural bridge and its construction method suitable for grassland wetland of the present invention, bridge lower junction
Structure, superstructure are all made of fabricated precast construction, are spliced at the scene, and live pouring is intended merely to play connection
Effect, thus compared to the prior art in the mode of pile at the scene completely, significantly reduce the pile foundation construction period, realize
It improves soft clay area routine bridge construction speed, reduce project cost, promote the effect of bridge industrialization degree；Simultaneously because
Treatment of soft foundation is carried out without live high-fill roadbed or to pile foundation, therefore local lithic drainage, wild animal are migrated, herdsman
The influence of life is smaller, can effectively reduce the influence of the higher grassland Wetland Environment of environmentally sensitive property.
3, a kind of full precast assembly structural bridge and its construction method suitable for grassland wetland of the present invention, to have pacified girder span
As the phloem-xylem transport channel of prefabricated tubular pile, prefabricated bent cap and superstructure, using reusable loading plate as mainframe
The construction shipping platform of tool avoids influence of the treatment of soft foundation to Wetland Environment when builder's road is built, and realizes upper and lower part knot
Structure longitudinally simultaneously advances, and the construction time is short, and construction safety risk is small, economy is good, to grassland ecology area is pushed, especially
Be western highlands transportation network development it is significant
Detailed description of the invention
Attached drawing described herein is used to provide to further understand the embodiment of the present invention, constitutes one of the application
Point, do not constitute the restriction to the embodiment of the present invention.In the accompanying drawings:
Fig. 1 is the structural schematic diagram of the specific embodiment of the invention；
Schematic diagram when Fig. 2 is hoisting prefabricated bent cap in the specific embodiment of the invention.
Label and corresponding parts title in attached drawing:
1- prefabricated tubular pile, the prefabricated bent cap of 2-, 3- loading plate, 4- step, 5- notch, 6- jack, 7- superstructure.
Specific embodiment
To make the objectives, technical solutions, and advantages of the present invention clearer, below with reference to embodiment and attached drawing, to this
Invention is described in further detail, and exemplary embodiment of the invention and its explanation for explaining only the invention, are not made
For limitation of the invention.
Embodiment 1:
A kind of full precast assembly structural bridge suitable for grassland wetland as shown in Figures 1 and 2, including several preform lids
Several linear distributing notches (5) are arranged on the prefabricated bent cap (2) for beam (2), insert for setting two in each notch (5)
Hole (6), the axis of two jacks (6) are respectively tilted to the two opposite outer of prefabricated bent cap (2) from top to bottom, each jack (6)
It is inside inserted into the prefabricated tubular pile (1) to match, by cast-in-place between the top and corresponding jack (6) of the prefabricated tubular pile (1)
Concrete is fixed；Superstructure (7) are laid on two neighboring prefabricated bent cap (2), the superstructure (7) is prefabricated small box girder
Or Prefabricated superposed beam.
The present embodiment is according to geographic and geomorphic conditions, conjunctive path demand, determines wiring position layout scheme, consider bridge pier by
Power, piling technique and economy, bridge superstructure be selected as across footpath can be selected 16 meters or 20 meters of prestressed concrete small box girders or
The prefabricated I-shaped steel plate composite beam of 30 meters of across footpaths.Bent cap width is in 8 meters of ranges using integral prefabricated, and bent cap width is at 8 meters or more
When, using precast block, wet seam control width control is in 50cm between bent cap prefabricated section.Pile foundation is prefabricated pre- using hybrid reinforcement
Stress tubular pole, round or rectangular, diameter uses 60cm-80cm, prefabricated to squeeze into mode pile, the exposed certain altitude of pile foundation
In case connecting prefabricated bent cap.To adapt to highlight lines area antidetonation demand, improves tubular pole and resist horizontal force ability, tubular pole default 5~
10 ° of inclination angle, specific angle are preferred according to Force Calculation and geological conditions.
Embodiment 2:
A kind of full precast assembly structural bridge suitable for grassland wetland as shown in Figures 1 and 2, in the base of embodiment 1
On plinth, the top surface of the prefabricated bent cap 2 is rectangle, and several notches 5 on prefabricated bent cap 2 are distributed along rectangular long axis, often
Two jacks 6 in a notch 5 are tilted towards rectangular long axis two sides.Step 4, the prefabricated tubular pile are set in the jack 6
1 can not pass through the step 4 from bottom to top.Angle between the axis and plumb line of the prefabricated tubular pile 1 is 8 °.It is described pre-
Bent cap 2 processed is integral prefabricated or separate prefabricated；When prefabricated bent cap 2 is separate prefabricated, connected between adjacent two parts by wet seam
It connects.The prefabricated tubular pile 1 is hybrid reinforcement prefabricated prestressing pipe pile, and the prefabricated small box girder is prestressed concrete small box girder,
The Prefabricated superposed beam is prefabricated I-shaped steel plate composite beam.
The construction method of the present embodiment are as follows:
(a) according to geographic and geomorphic conditions, conjunctive path demand, wiring position layout scheme is determined；Consider bridge pier stress, piling
Technique and economy determine the type and size of bridge superstructure；Produce prefabricated tubular pile 1, prefabricated bent cap 2, superstructure 7
And it is transported to scene；
(b) ground is laid with loading plate 3 at the scene, provides the running lanes of piling machine and crane；Piling machine runs to stake position
Locate inserting piling prefabricated tubular pile 1；
(c) after having beaten all pile foundations of first and second bridge pier, prefabricated bent cap 2 is installed, be poured prefabricated bent cap 2 with it is right
The connector between prefabricated tubular pile 1 answered completes the first hole Bridge Pier Construction, then sets up between first and second bridge pier the
One across superstructure；
(d) phloem-xylem transport channel of the superstructure set up as prefabricated tubular pile 1, prefabricated bent cap 2 and superstructure, will
Prefabricated tubular pile 1, prefabricated bent cap 2 and superstructure are transported forward in place；Loading plate lifting is advanced at third bridge pier stake position,
Move forward piling machine and crane；
(e) pile foundation for squeezing into third bridge pier installs prefabricated bent cap 2, is poured prefabricated bent cap 2 and corresponding prefabricated tubular pile 1
Between connector, complete the second hole Bridge Pier Construction, then between second and third bridge pier set up second across top tie
Structure；
(f) step (d)~(e) is repeated, upper and lower part longitudinally simultaneously advances until completing construction.
Preferably, when prefabricated 2 width of bent cap is less than or equal to 8m, use is integral prefabricated；When bent cap width is greater than 8m, use
Precast block, each piecemeal are connected by wet seam at the scene, and the width of wet seam is controlled in 40~60cm.
Preferably, the diameter of the prefabricated tubular pile 1 is 60~80cm, the folder between the axis and plumb line of prefabricated tubular pile 1
Angle is 5~10 °.
Preferably, the method for setting up superstructure is: after prefabricated bent cap 2 is installed, the cast-in-place support on prefabricated bent cap 2
Pinner, after bearing pad stone reaches intensity, erection support sets up superstructure, binding beam body and wet seam steel using Bridge Erector
Muscle.
Embodiment 3:
Using purchase finished industrial product or establishes the prefabricated method of precasting yard and prepare prestressing force pile foundation, prefabricated bent cap, 25 meters small
Box beam waits mounting structure.Use the road fixed as transport channel, component to be assembled is transported at bridge location.?
Ground is laid with loading plate, provides the running lanes of piling machine and crane.Piling machine runs to inserting piling prefabricated tubular pile at stake position, beats
After all pile foundations of complete first and second bridge pier, prefabricated bent cap is installed using loop wheel machine, handles connector.Cast-in-place pier cap beam
Bearing pad stone.After bearing pad stone reaches intensity, erection support sets up 25 meters of small box girders using Bridge Erector, binds beam body and wet
Seam reinforcing bar, selecting a good opportunity to pour is completed the wet seam of beam body.It is setting up beam body simultaneously, bearing plate is lifted using loop wheel machine and is moved forward, is beaten
Stake machine is pushed ahead in front of bridge length to next bridge pier by loading plate.Prefabricated pile is transported using completed access bridge
Access bridge end yet to be built, by side crane lifting it is in place after, carry out the inserting piling of pile foundation, spreading.It repeats the above steps, realizes up and down
Portion's structure synchronization assembly promotes.Construction guardrail, bridge floor in-situ layer after full-bridge beam body frame is logical, after intensity reaches design strength,
Asphalt concrete, construct bridge floor mark, graticule.
Above-described specific embodiment has carried out further the purpose of the present invention, technical scheme and beneficial effects
It is described in detail, it should be understood that being not used to limit this hair the foregoing is merely a specific embodiment of the invention
Bright protection scope, all within the spirits and principles of the present invention, any modification, equivalent substitution, improvement and etc. done should all
It is included within protection scope of the present invention.
Claims (10)
1. a kind of full precast assembly structural bridge suitable for grassland wetland, which is characterized in that including several prefabricated bent caps (2),
Several linear distributing notches (5) are set on the prefabricated bent cap (2), two jacks (6) are set in each notch (5),
The axis of two jacks (6) is respectively tilted to the two opposite outer of prefabricated bent cap (2) from top to bottom, is inserted in each jack (6)
Enter the prefabricated tubular pile (1) to match, passes through cast-in-place concrete between the top and corresponding jack (6) of the prefabricated tubular pile (1)
It is fixed；Superstructure (7) are laid on two neighboring prefabricated bent cap (2), the superstructure (7) is prefabricated small box girder or prefabricated folded
Close beam.
2. a kind of full precast assembly structural bridge suitable for grassland wetland according to claim 1, which is characterized in that institute
The top surface for stating prefabricated bent cap (2) is rectangle, and several notches (5) on prefabricated bent cap (2) are distributed along rectangular long axis, each
Two jacks (6) in notch (5) tilt towards rectangular long axis two sides.
3. a kind of full precast assembly structural bridge suitable for grassland wetland according to claim 1, which is characterized in that institute
It states in jack (6) and step (4) is set, the prefabricated tubular pile (1) can not pass through the step (4) from bottom to top.
4. a kind of full precast assembly structural bridge suitable for grassland wetland according to claim 1, which is characterized in that institute
The angle stated between the axis and plumb line of prefabricated tubular pile (1) is 5~10o。
5. a kind of full precast assembly structural bridge suitable for grassland wetland according to claim 1, which is characterized in that institute
It is integral prefabricated or separate prefabricated for stating prefabricated bent cap (2)；When prefabricated bent cap (2) is separate prefabricated, pass through between adjacent two parts
Wet seam connection.
6. a kind of full precast assembly structural bridge suitable for grassland wetland according to claim 1, which is characterized in that institute
Stating prefabricated tubular pile (1) is hybrid reinforcement prefabricated prestressing pipe pile, and the prefabricated small box girder is prestressed concrete small box girder, described
Prefabricated superposed beam is prefabricated I-shaped steel plate composite beam.
7. based on a kind of applying for full precast assembly structural bridge suitable for grassland wetland arbitrarily described in claim 1 to 6
Work method, which comprises the following steps:
(a) according to geographic and geomorphic conditions, conjunctive path demand, wiring position layout scheme is determined；Consider bridge pier stress, piling technique
And economy, determine the type and size of bridge superstructure；Produce prefabricated tubular pile (1), prefabricated bent cap (2), superstructure simultaneously
It is transported to scene；
(b) ground is laid with loading plate (3) at the scene, provides the running lanes of piling machine and crane；Piling machine is run at stake position
Inserting piling prefabricated tubular pile (1)；
(c) after having beaten all pile foundations of first and second bridge pier, prefabricated bent cap (2) are installed, be poured prefabricated bent cap (2) with it is right
The connector between prefabricated tubular pile (1) answered completes the first hole Bridge Pier Construction, then sets up between first and second bridge pier the
One across superstructure；
(d) phloem-xylem transport channel of the superstructure set up as prefabricated tubular pile (1), prefabricated bent cap (2) and superstructure, will
Prefabricated tubular pile (1), prefabricated bent cap (2) and superstructure are transported forward in place；Loading plate lifting is advanced to third bridge pier stake position
Place, move forward piling machine and crane；
(e) pile foundation for squeezing into third bridge pier installs prefabricated bent cap (2), is poured prefabricated bent cap (2) and corresponding prefabricated tubular pile
(1) connector between, complete the second hole Bridge Pier Construction, then between second and third bridge pier set up second across top tie
Structure；
(f) step (d)~(e) is repeated, upper and lower part longitudinally simultaneously advances until completing construction.
8. a kind of construction method of full precast assembly structural bridge suitable for grassland wetland according to claim 7,
It is characterized in that, when prefabricated bent cap (2) width is less than or equal to 8m, use is integral prefabricated；When bent cap width is greater than 8m, using piecemeal
Prefabricated, each piecemeal is connected by wet seam at the scene, and the width of wet seam is controlled in 40~60cm.
9. a kind of construction method of full precast assembly structural bridge suitable for grassland wetland according to claim 7,
It is characterized in that, the diameter of the prefabricated tubular pile (1) is 60~80cm, the angle between the axis and plumb line of prefabricated tubular pile (1)
It is 5~10o。
10. a kind of construction method of full precast assembly structural bridge suitable for grassland wetland according to claim 7,
It is characterized in that, the method for setting up superstructure is: after prefabricated bent cap (2) is installed, in the upper cast-in-place branch seat cushion of prefabricated bent cap (2)
Stone, after bearing pad stone reaches intensity, erection support sets up superstructure, binding beam body and wet seam reinforcing bar using Bridge Erector.
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