CN105648898B - Prefabricated ultra-high performance concrete half-through beam element, bridge structure and construction method - Google Patents
Prefabricated ultra-high performance concrete half-through beam element, bridge structure and construction method Download PDFInfo
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- CN105648898B CN105648898B CN201610070637.7A CN201610070637A CN105648898B CN 105648898 B CN105648898 B CN 105648898B CN 201610070637 A CN201610070637 A CN 201610070637A CN 105648898 B CN105648898 B CN 105648898B
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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
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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
- E01D2101/26—Concrete reinforced
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Abstract
A kind of prefabricated ultra-high performance concrete half-through beam element, bridge structure and construction method, the half-through beam element is mainly by the girder of ultra-high performance concrete, diaphragm plate and floorings are integral prefabricated forms；Diaphragm plate is longitudinally uniformly distributed below floorings along bridge, and floorings are supported jointly by girder and diaphragm plate, and the side of half-through beam element is set as the interconnecting piece spliced with adjacent half-through beam element.The half-through beam element can be combined into a Two bors d's oeuveres half-through beam element after bridge lateral splicing.Multiple aforementioned half-through beam elements may make up half-through bridge girder construction after bridge is longitudinal spliced, by the way that the cast-in-place seam of ultra-high performance concrete is arranged in interconnecting piece.Then first prefabricated ultra-high performance concrete half-through beam element when construction carries out on-site hoisting, cast-in-place seam, is spliced to form half-through bridge girder construction main body successively, finally completes the construction of appurtenant work.The present invention has dead weight compared with light, durability is good, can effectively reduce the significant advantages such as beam body building height.
Description
Technical field
The present invention relates to a kind of bridge member, bridge body construction and its construction more particularly to a kind of prefabricated very-high performances
Concrete (UHPC) beam element, bridge structure and its construction method.
Background technology
Precast prestressed concrete beam has many advantages, such as that simple in structure, stress is clear, cheap, erection is convenient, in bridge
A degree of application is obtained in girder construction, but since common concrete material tensile strength is low, shrinkage and creep is big, in vehicle
Under load long term, beam body easy tos produce crack, and water permeating of bridge floor corrodes girder, and durability is had a greatly reduced quality.
For common prefabricated concrete bridge form, in upper cross a river stream, highway, opened the navigation or air flight, be open to traffic to under-clearance and
The limitation of end of the bridge elevation generally requires to reduce bridge structure building height, and the drop of normal concrete structural bridge building height
It is low, it means to reduce girder or web height, and this is unsafe for bridge structure.Therefore, how bridge is being reduced
While height, also to ensure safety and the durability of bridge structure, this is always the technology that those skilled in the art face for a long time
Problem.Although having been presented for some solutions in existing document, there is that complicated, cost is high, constructional difficulties
Or bridge height reduces the various defects such as limited extent.
Invention content
The technical problem to be solved by the present invention is to overcome the shortcomings of to mention in background above technology and defect, fully profit
With the high advantage of UHPC compression strength, a kind of dead weight is provided compared with light, durability is good, can effectively reduce the prefabricated of beam body building height
Ultra-high performance concrete half-through beam element, and the half-through that is made of the prefabricated ultra-high performance concrete half-through beam element
Bridge structure, correspondingly provides that a kind of simple for process, easy to operate, speed of application is fast, good economy performance prefabricated very-high performance is mixed
The construction method of solidifying soil half-through bridge girder construction.
In order to solve the above technical problems, technical solution proposed by the present invention be it is a kind of can be applied to it is prefabricated in bridge structure
Ultra-high performance concrete half-through beam element, the prefabricated ultra-high performance concrete half-through beam element are mainly mixed by very-high performance
Solidifying soil girder, ultra-high performance concrete diaphragm plate and ultra-high performance concrete floorings are integral prefabricated forms；The very-high performance
Concrete girder setting is in ultra-high performance concrete floorings both sides and affixed therewith, the ultra-high performance concrete master positioned at both sides
Beam is mutually parallel；The ultra-high performance concrete diaphragm plate is longitudinally uniformly distributed under ultra-high performance concrete floorings along bridge
Side, and, the ultra-high performance concrete affixed with the ultra-high performance concrete girder of ultra-high performance concrete floorings and both sides
Floorings are supported jointly by ultra-high performance concrete girder and ultra-high performance concrete diaphragm plate, the prefabricated very-high performance coagulation
Native half-through beam element is set as and contiguous prefabricated ultra-high performance concrete half-through beam element along the one or both sides of bridge longitudinal direction
The interconnecting piece spliced.
Above-mentioned prefabricated ultra-high performance concrete half-through beam element, preferably：The ultra-high performance concrete floorings
The slim plate of longitudinal rib is carried using lower part, the longitudinal rib is evenly distributed on ultra-high performance concrete floorings along bridge lateral
On bottom surface.
Above-mentioned prefabricated ultra-high performance concrete half-through beam element, more preferably：The top surface width of the longitudinal rib is more than
Its bottom width, and the width of longitudinal rib is gradual from the top in the end face becomes smaller.It is furthermore preferred that the cross section of the longitudinal rib is fallen in one
Trapezoidal shape.The top surface width of the longitudinal rib be 0.12m~0.20m, the longitudinal rib bottom width be 0.10m~0.18m, adjacent two
The spacing of longitudinal rib is 0.45m~1.50m.Size design scheme preferred in this way can give full play to ultra-high performance concrete intensity
Height, non-coarse aggregate, easily closely knit technical advantage mitigate the dead weight of ultra-high performance concrete floorings.
Above-mentioned prefabricated ultra-high performance concrete half-through beam element, preferably：The ultra-high performance concrete floorings
Plate overall thickness (including longitudinal rib) be 0.18m~0.25m, wherein the panel body being fixed in above the longitudinal rib (3)
(4) thickness is 0.05m~0.10m.
Above-mentioned prefabricated ultra-high performance concrete half-through beam element, preferably：The ultra-high performance concrete girder is adopted
The inverted T-shaped structure widened with bottom, size 0.60m~2.0m is widened in the bottom of the ultra-high performance concrete girder, described super
The thickness of high performance concrete girder is 0.20m~0.30m, and the overall height of the ultra-high performance concrete girder is prefabricated
The 1/18~1/30 of ultra-high performance concrete half-through beam element across footpath.
According to above-mentioned preferred size design scheme, wanting for ultra-high performance concrete girder strength and stiffness can be met
It asks, while beam body dead weight is only the half or so of conventional concrete beam dead weight.
The technical concept total as one, the present invention also provides a kind of prefabricated very-high performances that can be applied in bridge structure
Concrete Two bors d's oeuveres half-through beam element, the Two bors d's oeuveres half-through beam element is by above-mentioned prefabricated ultra-high performance concrete half-through beam
Unit is spliced along bridge lateral, and the prefabricated ultra-high performance concrete half-through beam element of both of the aforesaid be by its respectively one
The ultra-high performance concrete girder of side affixed side by side and shape is integral.
The technical concept total as one, the present invention also provides a kind of prefabricated ultra-high performance concrete half-through bridge knots
Structure, the half-through bridge girder construction are mixed by above-mentioned prefabricated ultra-high performance concrete half-through beam element or prefabricated very-high performance
Solidifying soil Two bors d's oeuveres half-through beam element is formed along bridge is longitudinal spliced, and two neighboring half-through beam element is that the portion of being connected through connects
It connects, the interconnecting piece is equipped with the cast-in-place seam of ultra-high performance concrete.
In above-mentioned prefabricated ultra-high performance concrete half-through bridge girder construction, preferably：The ultra-high performance concrete is horizontal
Along bridge, longitudinally intensive arrangement, its spacing are 2.5m~5.0m to partition board, and thickness is 0.1m~0.2m, is highly very-high performance coagulation
The 1/5~1/15 of native girder spacing (i.e. bridge lateral width).The setting of ultra-high performance concrete diaphragm plate can be protected in the present invention
Demonstrate,proving half-through bridge girder construction has enough torsional rigidities, and can be directly pre-formed in early period, facilitates construction.
The prefabricated ultra-high performance concrete half-through beam element of aforementioned present invention and its half-through bridge girder construction of composition, by
In using ultra-high performance concrete as structural material, and rational connection is coordinated to be arranged so that half-through beam element
Girder web plate thickness and floorings average thickness reduce (panel thickness is only the 1/3~1/2 of traditional precast concrete beam), simultaneously
Ultra-high performance concrete girder only needs a small amount of distributing bar without variable cross-section, pre-stress system, this so that the present invention's is pre-
The overall depth of section and width of ultra-high performance concrete half-through bridge girder construction processed are protected with traditional precast concrete beam design value
Hold it is comparable under the premise of, entire beam body is greatly reduced from Beijing South Maxpower Technology Co. Ltd, compared with common Medium Span type of bridge, can effectively drop
Low constructionheightofbridge (constructionheightofbridge is only 1/2 or so of traditional precast concrete beam).
The technical concept total as one, the present invention also provides a kind of above-mentioned prefabricated ultra-high performance concrete half-through bridges
The construction method of girder construction, includes the following steps：
(a) integral prefabricated described super in factory according to the structure of the prefabricated ultra-high performance concrete half-through beam element
High performance concrete girder, ultra-high performance concrete diaphragm plate and ultra-high performance concrete floorings are formed individually prefabricated super
High performance concrete half-through beam element；
(b) after ultra-high performance concrete girder reaches design strength, on-site hoisting is carried out；Lifting in place after, by
The cast-in-place seam of ultra-high performance concrete is arranged in the interconnecting piece of adjacent two prefabricated ultra-high performance concrete half-through beam element, will be described
Prefabricated ultra-high performance concrete half-through beam element is longitudinally spliced to form half-through bridge girder construction main body successively along bridge；
(c) construction of appurtenant work and deck paving is finally completed.
Above-mentioned construction method, preferably：The construction of the half-through bridge girder construction is to be applied to simply supported girder bridge or company
The bridge construction work progress of continuous beam bridge；The beam section longitudinal length of the half-through bridge girder construction is equal to bridge single span span length
Degree, the bridge single span across footpath are 20m~60m, and the constructionheightofbridge is the 1/35~1/50 of bridge single span across footpath.This hair
Bright technical solution is particularly suitable for simply supported girder bridge or continuous bridge, by the construction technology of this kind of bridge type maturation and equipment and the present invention
It is combined, can better ensure that bridge structure of the present invention and its feasibility and construction efficiency of construction, connected applications are above-mentioned
Technical solution will generate more significant technique effect and technical advantage.
Above-mentioned construction method, preferably：The superelevation that the prefabricated ultra-high performance concrete half-through beam element uses
Energy concrete material is the ultra-high performance concrete of bending and tensile strength 20MPa or more, compression strength 120MPa or more.
Compared with the prior art, the advantages of the present invention are as follows：
First, prefabricated ultra-high performance concrete half-through beam element provided by the invention and bridge structure use superelevation
Energy concrete, compression strength may be up to 120MPa or more, the lightness of girder may be implemented, and can not only mitigate substructure
Weight, the span ability for improving bridge, and prefabricated, assembled, the transport of structure is made to be more prone to；
Second, the present invention greatly reduces constructionheightofbridge compared to traditional Medium Span beams of concrete, can make more
Layer viaduct overall height is greatly lowered, shorten access bridge or length of leading the way, reduce quantities, account for soil, engineering of removing less less,
Huge economic benefit and environmental benefit thus can be obtained；In addition, since the gradient becomes smaller, vehicle climbing amount is small, can also drop
Low running cost；
Third, the present invention can effectively reduce the cracking risk of traditional precast concrete beam；Due to ultra-high performance concrete
Bending and tensile strength up to 20MPa or more, and later stage after high-temperature steam curing shrinks substantially zeroed, and the later stage creeps also very little,
This makes the present invention have enough guarantees in terms of taking precautions against prefabricated beam body cracking；
4th, the present invention integral prefabricated, integral hoisting form of construction work using ultra-high performance concrete girder and floorings,
It is not only convenient for constructing, and enhances the durability of bridge structure, facilitate the later maintenance of bridge.
On the whole, the present invention, which has from heavy and light, durability is good, reduce beam body cracking risk, bridge is greatly lowered builds
The significant advantages such as height are built, there is preferable commercial application foreground.
Description of the drawings
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technology description to be briefly described, it should be apparent that, the accompanying drawings in the following description is the present invention
Some embodiments for those of ordinary skill in the art without creative efforts, can also basis
These attached drawings obtain other attached drawings.
Fig. 1 is the elevation of prefabricated ultra-high performance concrete half-through bridge girder construction in the embodiment of the present invention.
Fig. 2 is the sectional view at A-A in Fig. 1.
Fig. 3 is the sectional view at B-B in Fig. 1.
Fig. 4 is the cross-sectional view of prefabricated ultra-high performance concrete Two bors d's oeuveres half-through beam element in the present invention.
Fig. 5 is the partial enlarged view at C in Fig. 3.
Marginal data：
1, ultra-high performance concrete floorings；2, wearing course；3, longitudinal rib；4, panel body；5, ultra-high performance concrete master
Beam；6, ultra-high performance concrete end diaphragm plate；7, ultra-high performance concrete diaphragm plate；8, guardrail；9, ultra-high performance concrete
Cast-in-place seam.
Specific implementation mode
To facilitate the understanding of the present invention, the present invention is made below in conjunction with Figure of description and preferred embodiment more complete
Face meticulously describes, but the protection scope of the present invention is not limited to the following specific embodiments.
It should be strongly noted that when to be described as " be fixed on, be fixed in, be connected to or be communicated in " another for a certain element
When on element, it can be directly fixed, affixed, connection or be connected on another element, can also be by connecting among other
Fitting is indirectly fixed, affixed, connects or is connected on another element.
Unless otherwise defined, all technical terms used hereinafter and the normally understood meaning of those skilled in the art
It is identical.Technical term used herein is intended merely to the purpose of description specific embodiment, is not intended to the limitation present invention
Protection domain.
Unless otherwise specified, various raw material, reagent, the instrument and equipment etc. used in the present invention can pass through city
Field is commercially available or can be prepared by existing method.
Embodiment 1：
It is a kind of to can be applied in the prefabricated ultra-high performance concrete in bridge structure hold as shown in Figure 1, Figure 2, shown in Fig. 3
Formula beam element, the prefabricated ultra-high performance concrete half-through beam element are mainly mixed by ultra-high performance concrete girder 5, very-high performance
Solidifying soil diaphragm plate 7 and ultra-high performance concrete floorings 1 are integral prefabricated forms；Ultra-high performance concrete girder 5 is arranged in superelevation
1 both sides of performance concrete floorings are simultaneously affixed therewith, and the ultra-high performance concrete girder 5 for being located at both sides is longitudinal mutually flat along bridge
Row.Ultra-high performance concrete diaphragm plate 7 is longitudinally uniformly distributed below ultra-high performance concrete floorings 1 along bridge, and with it is super
High performance concrete floorings 1 and the ultra-high performance concrete girder 5 of both sides are affixed, and ultra-high performance concrete floorings 1 are by surpassing
High performance concrete girder 5 and ultra-high performance concrete diaphragm plate 7 support jointly, prefabricated ultra-high performance concrete half-through beam list
The company that member is set as being spliced with contiguous prefabricated ultra-high performance concrete half-through beam element along the one or both sides of bridge longitudinal direction
Socket part.
As shown in figure 5, in the prefabricated ultra-high performance concrete half-through beam element of the present embodiment, ultra-high performance concrete bridge
Panel 1 carries the slim plate of longitudinal rib 3 using lower part, and longitudinal rib 3 is evenly distributed on ultra-high performance concrete bridge floor along bridge lateral
On the bottom surface of plate 1.The top surface width of longitudinal rib 3 is more than its bottom width, and the gradual change from the top in the end face of the width of longitudinal rib 3
It is small.The cross section of longitudinal rib 3 in the present embodiment is in an inverted trapezoidal shape；The top surface width of longitudinal rib 3 is 0.20m, the height of longitudinal rib 3
Bottom width for 0.11m, longitudinal rib 3 is 0.18m, and the spacing of adjacent two longitudinal rib 3 is 0.7m.The prefabricated very-high performance of the present embodiment
In concrete half-through beam element, the plate overall thickness of ultra-high performance concrete floorings 1 is 0.18m, wherein is fixed in longitudinal rib
The thickness of the panel body 4 of 3 tops is 0.07m.
In the prefabricated ultra-high performance concrete half-through beam element of the present embodiment, ultra-high performance concrete girder 5 uses bottom
Size 0.90m, ultra-high performance concrete girder 5 are widened in the bottom of the inverted T-shaped structure that portion is widened, ultra-high performance concrete girder 5
Girder thickness be 0.25m, the overall height of ultra-high performance concrete girder 5 is prefabricated ultra-high performance concrete half-through beam list
The 1/20 of first across footpath.
The prefabricated ultra-high performance concrete half-through beam element of above-mentioned the present embodiment can splice and combine, and constitute a kind of hair
Bright prefabricated ultra-high performance concrete half-through bridge girder construction, the half-through bridge girder construction are by the prefabricated of multiple aforementioned present invention
Ultra-high performance concrete half-through beam element is formed along bridge is longitudinal spliced, and two neighboring half-through beam element is to be connected through
Portion connects, and interconnecting piece is equipped with the cast-in-place seam of ultra-high performance concrete 9.Ultra-high performance concrete diaphragm plate 7 is along entire bridge longitudinal direction
Arranged for interval, spacing 3.0m, thickness are 0.1m~0.2m.In addition, in each prefabricated ultra-high performance concrete half-through beam list
The end of member, can be especially arranged just like ultra-high performance concrete end shown in Fig. 3 diaphragm plate 6, ultra-high performance concrete end
Portion's diaphragm plate 6 higher, ultra-high performance concrete tabula than the height of the uniformly distributed ultra-high performance concrete diaphragm plate 7 in middle part
The height of plate 7 is the 1/10 of 5 spacing of ultra-high performance concrete girder, and the height of ultra-high performance concrete end diaphragm plate 6 is
The 1/6 of 5 spacing of ultra-high performance concrete girder；The beam section longitudinal length of the half-through bridge girder construction is equal to bridge single span span length
Degree, the present embodiment Bridge single span across footpath are 50m, and beam section transverse width is 8.25m in the present embodiment, and constructionheightofbridge is bridge
The 1/39 of beam single span across footpath.It is equipped with wearing course 2, ultra-high performance concrete bridge floor on entire ultra-high performance concrete floorings 1
Guardrail 8 is additionally provided on plate 1.
The construction of the half-through bridge girder construction of above-mentioned the present embodiment is particularly suitable for simply supported girder bridge or continuous bridge
Bridge construction work progress；The construction method of the prefabricated ultra-high performance concrete half-through bridge girder construction specifically includes following step
Suddenly：
(a) according to the structure of above-mentioned prefabricated ultra-high performance concrete half-through beam element, in the integral prefabricated superelevation of factory
Energy concrete girder 5, ultra-high performance concrete diaphragm plate 7 and ultra-high performance concrete floorings 1 form individually prefabricated superelevation
Performance concrete half-through beam element；The ultra-high performance concrete material that prefabricated ultra-high performance concrete half-through beam element uses
It is the ultra-high performance concrete of bending and tensile strength 20MPa or more, compression strength 120MPa or more；
(b) after ultra-high performance concrete girder 5 reaches design strength, on-site hoisting is carried out；Lifting in place after, by
The cast-in-place seam 9 of ultra-high performance concrete is arranged in the interconnecting piece of adjacent two prefabricated ultra-high performance concrete half-through beam element, will be pre-
Ultra-high performance concrete half-through beam element processed is longitudinally spliced to form half-through bridge girder construction main body successively along bridge；
(c) construction of appurtenant work (such as guardrail 8) and deck paving (such as wearing course 2) is finally completed.
Embodiment 2：
It is double that another prefabricated ultra-high performance concrete that can be applied to as shown in Figure 4 in bridge structure can also be provided in the present invention
Half-through beam element is spelled, which is by pre- in two above-described embodiments 1
Ultra-high performance concrete half-through beam element processed is spliced along bridge lateral, and in the prefabricated ultra-high performance concrete of both of the aforesaid
The formula beam element of holding be by its respectively the ultra-high performance concrete girder 5 of side to be spliced to form one side by side whole.So just
The transverse width and bus capacity of bridge can be effectively increased, at the same can also continue to play the present invention technical advantage and
Economic advantages.
Claims (6)
1. a kind of prefabricated ultra-high performance concrete half-through bridge girder construction, it is characterised in that：The half-through bridge girder construction be by
Multiple prefabricated ultra-high performance concrete half-through beam elements or prefabricated ultra-high performance concrete Two bors d's oeuveres half-through beam element are along bridge
Longitudinal spliced to form, two neighboring half-through beam element is the portion's of being connected through connection, and the interconnecting piece is mixed equipped with very-high performance
The solidifying cast-in-place seam of soil（9）；Wherein, the prefabricated ultra-high performance concrete half-through beam element is mainly by ultra-high performance concrete master
Beam（5）, ultra-high performance concrete diaphragm plate（7）With ultra-high performance concrete floorings（1）It is integral prefabricated to form；The superelevation
It can concrete girder（5）It is arranged in ultra-high performance concrete floorings（1）Both sides are simultaneously affixed therewith, are located at the very-high performance of both sides
Concrete girder（5）It is mutually parallel；The ultra-high performance concrete diaphragm plate（7）It is longitudinally uniformly distributed in very-high performance along bridge
Concrete slab（1）Lower section, and with ultra-high performance concrete floorings（1）With the ultra-high performance concrete girder of both sides（5）
It is affixed, the ultra-high performance concrete floorings（1）By ultra-high performance concrete girder（5）And ultra-high performance concrete diaphragm plate
（7）Common bearing, the prefabricated ultra-high performance concrete half-through beam element are set as and phase along the one or both sides of bridge longitudinal direction
The interconnecting piece that adjacent prefabricated ultra-high performance concrete half-through beam element is spliced；The ultra-high performance concrete girder（5）It adopts
The inverted T-shaped structure widened with bottom, the ultra-high performance concrete girder（5）Bottom widen size 0.60m~2.0m, it is described
Ultra-high performance concrete girder（5）Thickness be 0.20m~0.30m, the ultra-high performance concrete girder（5）It is overall high
Degree is the 1/18~1/30 of prefabricated ultra-high performance concrete half-through beam element across footpath；The ultra-high performance concrete diaphragm plate
（7）Spacing along bridge longitudinal direction is 2.5m~5.0m, and thickness is 0.1m~0.2m, is highly ultra-high performance concrete girder（5）
The 1/5~1/15 of spacing；The ultra-high performance concrete floorings（1）It is fixed in the ultra-high performance concrete girder（5）'s
Middle part；The prefabricated ultra-high performance concrete Two bors d's oeuveres half-through beam element is by two prefabricated ultra-high performance concrete half-through beam lists
Member is spliced along bridge lateral, and the prefabricated ultra-high performance concrete half-through beam element of both of the aforesaid is by its respective side
Ultra-high performance concrete girder（5）It is affixed side by side and shape is integral.
2. prefabricated ultra-high performance concrete half-through bridge girder construction according to claim 1, it is characterised in that：The superelevation
Performance concrete floorings（1）Longitudinal rib is carried using lower part（3）Slim plate, the longitudinal rib（3）Uniformly divide along bridge lateral
Cloth is in ultra-high performance concrete floorings（1）Bottom surface on.
3. prefabricated ultra-high performance concrete half-through bridge girder construction according to claim 2, it is characterised in that：The longitudinal rib
（3）Top surface width be more than its bottom width, and longitudinal rib（3）Width gradual from the top in the end face become smaller.
4. prefabricated ultra-high performance concrete half-through bridge girder construction according to claim 3, it is characterised in that：The longitudinal rib
（3）Cross section be in an inverted trapezoidal shape；The longitudinal rib（3）Top surface width be 0.12m~0.20m, the longitudinal rib（3）Bottom surface
Width is 0.10m~0.18m, adjacent two longitudinal rib（3）Spacing be 0.45m~1.50m.
5. the prefabricated ultra-high performance concrete half-through bridge girder construction according to any one of claim 2 ~ 4, feature exist
In：The ultra-high performance concrete floorings（1）Plate overall thickness be 0.18m~0.25m, wherein be fixed in the longitudinal rib
（3）The panel body of top（4）Thickness be 0.05m~0.10m.
6. a kind of construction method of prefabricated ultra-high performance concrete half-through bridge girder construction as described in claim 1, in described
The construction for holding formula bridge structure is the bridge construction work progress applied to simply supported girder bridge or continuous bridge；The half-through bridge
The beam section longitudinal length of girder construction is equal to bridge single span across footpath length, and the bridge single span across footpath is 20m~60m, the bridge
Building height is the 1/35~1/50 of bridge single span across footpath；The construction method specifically includes following steps：
（a）According to the structure of the prefabricated ultra-high performance concrete half-through beam element, in the integral prefabricated superelevation of factory
It can concrete girder（5）, ultra-high performance concrete diaphragm plate（7）With ultra-high performance concrete floorings（1）, formed individually pre-
Ultra-high performance concrete half-through beam element processed；The very-high performance coagulation that prefabricated ultra-high performance concrete half-through beam element uses
Soil material is the ultra-high performance concrete of bending and tensile strength 20MPa or more, compression strength 120MPa or more；
（b）Wait for ultra-high performance concrete girder（5）After reaching design strength, on-site hoisting is carried out；After lifting in place, by phase
The cast-in-place seam of ultra-high performance concrete is arranged in the interconnecting piece of adjacent two prefabricated ultra-high performance concrete half-through beam elements（9）, by institute
It states prefabricated ultra-high performance concrete half-through beam element and is longitudinally spliced to form half-through bridge girder construction main body successively along bridge；
（c）Finally complete the construction of appurtenant work and deck paving.
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| CN109235222B (en) * | 2018-10-17 | 2020-04-14 | 湖南大学 | Light full-assembly type large cantilever ultrahigh-performance concrete finned beam and construction method thereof |
| CN109853358A (en) * | 2019-01-24 | 2019-06-07 | 西安公路研究院 | A kind of Very Low Clearance precast assembly integration UHPC spill beam bridge and its construction method |
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| CA2460643A1 (en) * | 2004-02-27 | 2005-08-27 | William Richard Haldane-Wilsone | Improvement in load supporting structure |
| CN203768784U (en) * | 2013-12-31 | 2014-08-13 | 湖南大学 | Super toughness concrete plate-steel beam light combined bridge structure |
| CN204212042U (en) * | 2014-11-18 | 2015-03-18 | 湖南大学 | Prefabricated ultra-high performance concrete π shape bridge construction |
| CN104389261B (en) * | 2014-11-18 | 2016-05-25 | 湖南大学 | Prefabricated ultra-high performance concrete π ellbeam unit, bridge structure and construction method thereof |
| CN205474797U (en) * | 2016-02-01 | 2016-08-17 | 湖南大学 | Hold formula beam element and half through bridge girder construction among prefabricated ultra high performance concrete |
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2016
- 2016-02-01 CN CN201610070637.7A patent/CN105648898B/en active Active
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