CN104762879A - Jointless expansion structure of cement concrete bridge deck pavement layer - Google Patents
Jointless expansion structure of cement concrete bridge deck pavement layer Download PDFInfo
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- CN104762879A CN104762879A CN201510188642.3A CN201510188642A CN104762879A CN 104762879 A CN104762879 A CN 104762879A CN 201510188642 A CN201510188642 A CN 201510188642A CN 104762879 A CN104762879 A CN 104762879A
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- cement
- composite material
- base composite
- high ductility
- cement 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
- E01D19/00—Structural or constructional details of bridges
- E01D19/12—Grating or flooring for bridges; Fastening railway sleepers or tracks to bridges
- E01D19/125—Grating or flooring for bridges
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
-
- 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
- E01D2101/266—Concrete reinforced with fibres other than steel or glass
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Ceramic Engineering (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Road Paving Structures (AREA)
Abstract
The invention discloses a jointless expansion structure of a cement concrete bridge deck pavement layer. The jointless expansion structure of the cement concrete bridge deck pavement layer is based on good extension properties of a high-ductility cement-based composite material, and replaces a traditional expansion joint structure to eliminate internal stress generated when a bridge girder longitudinally expands. The jointless expansion structure is mainly composed of a polytetrafluoroethylene sliding layer, anchor bars and a high-ductility cement-based composite material structure layer. A high-ductility cement-based composite material anchorage region is reliably connected with a cement concrete bridge girder body and a bridge deck slab, the bottom face of an expansion region and the polytetrafluoroethylene sliding layer freely slide, and therefore the good expansion structure is formed. Meanwhile, a continuous and flat interface is formed on the upper surface, so the problems that a traditional expansion joint is insufficient in durability and driving comfort is poor can be effectively solved.
Description
Technical field
The present invention relates to the technical field of highway construction, particularly relate to the seamless stretching structure of a kind of Cement Concrete Deck Paving Course.
Background technology
In conventional cement concrete bridge structure, shrinkage joint is important ingredient.Shrinkage joint is arranged on the structure weak parts such as beam-ends usually, and directly bear the effect of vehicle cyclic reverse loading, the out-of-flatness that shrinkage joint adjacent area is very small all can make it bear very large percussion, the toughness of concrete around shrinkage joint and shock resistance is caused to weaken, easily damaged under frequent impact effect, rainwater accumulates in damaged space, more accelerate concrete destruction, form vicious circle, thus cause the deformation failure at shrinkage joint, road-ability is reduced, noise increases, and rainwater also can infiltrate beam body by shrinkage joint, crisis bridge and traffic safety.Bridge machinery practice for many years shows, bridge expanssion joint has become bridge construction generation disease one of parts the most frequently, and the premature breakdown at shrinkage joint has increased the weight of the workload of bridge maintenance maintenance process.Cause the direct economic loss of maintenance and renovation, and the indirect economic loss brought owing to suspending traffic and negative social influence.Meanwhile, the pave-load layer structure of both sides, shrinkage joint also easily affects adversely, and adds the risk of the impaired destruction of pave-load layer.Therefore, the seamless stretching structure of design a kind of novel Cement Concrete Deck Paving Course of invention, conventional telescopic seam is substituted, cementing pump vehicle structure can either be met to stretch requirement, the continuity of deck paving can be kept again, for the driving comfort, the durability that improve cementing pump vehicle structure and deck paving, tool is of great significance.
Summary of the invention
The object of the invention is to overcome existing cementing pump vehicle shrinkage joint to the adverse effect of pave-load layer structure, design and develop a kind of continuity that can keep Bridge Surface Paving by Cement, promote the road-ability of pave-load layer and the seamless stretching structure of Cement Concrete Deck Paving Course of durability.
The present invention solves the problems of the technologies described above adopted technical scheme:
The seamless stretching structure of a kind of Cement Concrete Deck Paving Course, wherein: comprise high ductility cement-base composite material stretchable layer and slip bed course, high ductility cement-base composite material stretchable layer is laid on the shrinkage joint that formed between adjacent two cementing pump vehicle beam bodies, high ductility cement-base composite material stretchable layer two ends are fixed area, middle part is breathing zone, the fixed area of high ductility cement-base composite material stretchable layer is fixedly connected with cementing pump vehicle beam body, between the breathing zone that slip bed course is arranged on high ductility cement-base composite material stretchable layer and cementing pump vehicle beam body, slip bed course bottom is fixedly connected with cementing pump vehicle beam body, slip bed course top and high ductility cement-base composite material stretchable layer are slidably matched.
For optimizing technique scheme, the concrete measure taked also comprises:
Above-mentioned cementing pump vehicle beam body is equipped with cement concrete bridge deck plate, and high ductility cement-base composite material stretchable layer two ends are fixedly connected with the cement concrete bridge deck plate on two cementing pump vehicle beam bodies respectively.
Above-mentioned high ductility cement-base composite material stretchable layer is by anchor bar and cementing pump vehicle beam body and the anchor connection of cement concrete bridge deck plate.
The two ends of above-mentioned high ductility cement-base composite material stretchable layer and cement concrete bridge deck plate end apical grafting, and the high thickness of ductility cement-base composite material stretchable layer and the consistency of thickness of cement concrete bridge deck plate, high ductility cement-base composite material stretchable layer upper surface and cement concrete bridge deck plate upper surface form a flat surface jointly.
Above-mentioned slip bed course is that polytetrafluoroethylmaterial material is made.
Above-mentioned slip bed course is polytetrafluoroethylene (PTFE) moulded board, and polytetrafluoroethylene (PTFE) moulded board paves on cementing pump vehicle beam body, makes slip bed course upper surface smooth.
Above-mentioned slip bed course is by rivet and the anchoring of cementing pump vehicle beam body.
Above-mentioned high ductility cement-base composite material stretchable layer is at least prepared by following material: cement, flyash, fine aggregate, agstone, water, poly carboxylic acid series water reducer, vinal and thickener.
Time prepared by above-mentioned high ductility cement-base composite material stretchable layer, cement: flyash: fine aggregate: agstone: the ratio of water is 1:1.5:0.73:0.18:0.625; Poly carboxylic acid series water reducer volume is 0.220% to 0.641% of cement and flyash gross mass; Cumulative volume after mixing with flyash, cement, fine aggregate, agstone, water is for radix, and the volume volume of vinal is 1.5% to 2.0%; Thickener volume is 0.97% to 2.20% of vinal quality.
Above-mentioned high ductility cement-base composite material stretchable layer adopts hot and humid maintenance.
The present invention adopts the high ductility cement-base composite material with good extensibility to fill position, bridge deck shrinkage joint, forms complete continuous structure.Continuous print entirety is defined by anchor bar between high ductility cement based stretchable layer two ends of the present invention and cement concrete bridge deck plate and beam body, bottom can with polytetrafluoroethylene (PTFE) moulded board relative sliding, can to be expanded with heat and contract with cold produced displacement by the flexible counteracting cementing pump vehicle of self and bridge deck, dissipation bridge deck internal stress, the integrality simultaneously keeping bridge deck and the continuity of mating formation.
Accompanying drawing explanation
Fig. 1 is the structural representation of the seamless stretching structure of Cement Concrete Deck Paving Course of the present invention
Reference numeral is wherein: high ductility cement-base composite material stretchable layer 1, slip bed course 2, cementing pump vehicle beam body 3, cement concrete bridge deck plate 4, anchor bar 5, shrinkage joint 6.
Detailed description of the invention
Below in conjunction with accompanying drawing, embodiments of the invention are described in further detail.
The present embodiment as shown in Figure 1, the seamless stretching structure of a kind of Cement Concrete Deck Paving Course, comprise high ductility cement-base composite material stretchable layer 1 and slip bed course 2, high ductility cement-base composite material stretchable layer 1 is laid on the shrinkage joint 6 of formation between adjacent two cementing pump vehicle beam bodies 3, high ductility cement-base composite material stretchable layer 1 two ends are fixed area, middle part is breathing zone, the fixed area of high ductility cement-base composite material stretchable layer 1 is fixedly connected with cementing pump vehicle beam body 3, between the breathing zone that slip bed course 2 is arranged on high ductility cement-base composite material stretchable layer 1 and cementing pump vehicle beam body 3, slip bed course 2 bottom is fixedly connected with cementing pump vehicle beam body 3, slip bed course 2 top and high ductility cement-base composite material stretchable layer 1 are slidably matched.
In embodiment, cementing pump vehicle beam body 3 is equipped with cement concrete bridge deck plate 4, high ductility cement-base composite material stretchable layer 1 two ends are fixedly connected with the cement concrete bridge deck plate 4 on two cementing pump vehicle beam bodies 3 respectively.
In embodiment, high ductility cement-base composite material stretchable layer 1 is by anchor bar 5 and cementing pump vehicle beam body 3 and cement concrete bridge deck plate 4 anchor connection.Be 100mm by horizontal spacing between high ductility cement-base composite material stretchable layer 1 and cement concrete bridge deck plate 4, the HRB400 reinforcing bar of diameter 16mm is as dowel bar, and anchorage length adopts 500mm > 30d=480mm.Anchorage zone beam body top board implanted diameter is that the bar dowel of 12mm strengthens the stressed of stretchable layer anchorage zone.These two kinds of reinforcing bars form anchor bar 5 jointly.
In embodiment, the two ends of high ductility cement-base composite material stretchable layer 1 and cement concrete bridge deck plate 4 end apical grafting, and the high thickness of ductility cement-base composite material stretchable layer 1 and the consistency of thickness of cement concrete bridge deck plate 4, high ductility cement-base composite material stretchable layer 1 upper surface and cement concrete bridge deck plate 4 upper surface form a flat surface jointly.
In embodiment, slip bed course 2 is made for polytetrafluoroethylmaterial material.
In embodiment, slip bed course 2 is polytetrafluoroethylene (PTFE) moulded board, and polytetrafluoroethylene (PTFE) moulded board paves on cementing pump vehicle beam body 3, makes slip bed course 2 upper surface smooth.
In embodiment, slip bed course 2 is by rivet and the anchoring of cementing pump vehicle beam body 3.
In embodiment, high ductility cement-base composite material stretchable layer 1 is at least prepared by following material: cement, flyash, fine aggregate, agstone, water, poly carboxylic acid series water reducer, vinal and thickener.
In embodiment, time prepared by high ductility cement-base composite material stretchable layer 1, cement: flyash: fine aggregate: agstone: the ratio of water is 1:1.5:0.73:0.18:0.625; Poly carboxylic acid series water reducer volume is 0.220% to 0.641% of cement and flyash gross mass; Cumulative volume after mixing with flyash, cement, fine aggregate, agstone, water is for radix, and the volume volume of vinal is 1.5% to 2.0%; Thickener volume is 0.97% to 2.20% of vinal quality.
In embodiment, high ductility cement-base composite material stretchable layer 1 adopts hot and humid maintenance.
High ductility cement-base composite material design strength grade and bridge deck are consistent, and are not less than C40, and 14d intensity is 60% of design strength; Limit tensile strain design load is 1.0%, and measured value must not lower than design load.
High ductility cement-base composite material stretchable layer 1 both sides are actual breathing zone between anchorage zone.The total deformability in breathing zone must can offset the impact that displacement that Vehicle Load underbeam body corner produces, the stroke of temperature load effect underbeam body and high ductility cement-based material autogenous shrinkage amount sum produce.Total stroke calculates and calculates by formula (1):
（1）
The tensile strain of breathing zone calculates by formula (2), and can not be greater than the limit tensile strain design load 1% of high ductility cement composite material.
（2）
Total stroke
can be calculated by bridge structural mechanics or utilize analysis software to calculate to try to achieve.Then utilize formula (2) just can in the hope of the minimum length of breathing zone.In Practical Project, the length of breathing zone must not lower than this minimum length.
Arranging slip bed course 2 under breathing zone makes high ductility cement-base composite material freely to extend.Slip bed course 2 adopts polytetrafluoroethylene (PTFE) moulded board, and by tack peg or steel nail, bridge length direction is arranged by two rows, and cross direction 200mm together, is anchored on cementing pump vehicle beam body end face.Fitted by mud-jacking technology in gap between polyfluortetraethylene plate and beam body end face.
Below be only the preferred embodiment of the present invention, protection scope of the present invention be not only confined to above-described embodiment, all technical schemes belonged under thinking of the present invention all belong to protection scope of the present invention.It should be pointed out that for those skilled in the art, some improvements and modifications without departing from the principles of the present invention, should be considered as protection scope of the present invention.
Claims (10)
1. the seamless stretching structure of Cement Concrete Deck Paving Course, it is characterized in that: comprise high ductility cement-base composite material stretchable layer (1) and slip bed course (2), described high ductility cement-base composite material stretchable layer (1) is laid on the shrinkage joint (6) of formation between adjacent two cementing pump vehicle beam bodies (3), described high ductility cement-base composite material stretchable layer (1) two ends are fixed area, middle part is breathing zone, the fixed area of described high ductility cement-base composite material stretchable layer (1) is fixedly connected with cementing pump vehicle beam body (3), between the breathing zone that described slip bed course (2) is arranged on high ductility cement-base composite material stretchable layer (1) and cementing pump vehicle beam body (3), described slip bed course (2) bottom is fixedly connected with cementing pump vehicle beam body (3), slip bed course (2) top and high ductility cement-base composite material stretchable layer (1) are slidably matched.
2. the seamless stretching structure of a kind of Cement Concrete Deck Paving Course according to claim 1, it is characterized in that: described cementing pump vehicle beam body (3) is equipped with cement concrete bridge deck plate (4), described high ductility cement-base composite material stretchable layer (1) two ends are fixedly connected with the cement concrete bridge deck plate (4) on two cementing pump vehicle beam bodies (3) respectively.
3. the seamless stretching structure of a kind of Cement Concrete Deck Paving Course according to claim 2, is characterized in that: described high ductility cement-base composite material stretchable layer (1) is by anchor bar (5) and cementing pump vehicle beam body (3) and cement concrete bridge deck plate (4) anchor connection.
4. the seamless stretching structure of a kind of Cement Concrete Deck Paving Course according to claim 3, it is characterized in that: the two ends of described high ductility cement-base composite material stretchable layer (1) and cement concrete bridge deck plate (4) end apical grafting, and the thickness of high ductility cement-base composite material stretchable layer (1) and the consistency of thickness of cement concrete bridge deck plate (4), high ductility cement-base composite material stretchable layer (1) upper surface and cement concrete bridge deck plate (4) upper surface form a flat surface jointly.
5. the seamless stretching structure of a kind of Cement Concrete Deck Paving Course according to claim 4, is characterized in that: described slip bed course (2) is made for polytetrafluoroethylmaterial material.
6. the seamless stretching structure of a kind of Cement Concrete Deck Paving Course according to claim 5, it is characterized in that: described slip bed course (2) is polytetrafluoroethylene (PTFE) moulded board, and polytetrafluoroethylene (PTFE) moulded board paves on cementing pump vehicle beam body (3), make slip bed course (2) upper surface smooth.
7. the seamless stretching structure of a kind of Cement Concrete Deck Paving Course according to claim 6, is characterized in that: described slip bed course (2) is by rivet and cementing pump vehicle beam body (3) anchoring.
8. the seamless stretching structure of a kind of Cement Concrete Deck Paving Course according to claim 1, is characterized in that: described high ductility cement-base composite material stretchable layer (1) is at least prepared by following material: cement, flyash, fine aggregate, agstone, water, poly carboxylic acid series water reducer, vinal and thickener.
9. the seamless stretching structure of a kind of Cement Concrete Deck Paving Course according to claim 8, it is characterized in that: time prepared by described high ductility cement-base composite material stretchable layer (1), cement: flyash: fine aggregate: agstone: the ratio of water is 1:1.5:0.73:0.18:0.625; Poly carboxylic acid series water reducer volume is 0.220% to 0.641% of cement and flyash gross mass; Cumulative volume after mixing with flyash, cement, fine aggregate, agstone, water is for radix, and the volume volume of vinal is 1.5% to 2.0%; Thickener volume is 0.97% to 2.20% of vinal quality.
10. the seamless stretching structure of a kind of Cement Concrete Deck Paving Course according to claim 9, is characterized in that: described high ductility cement-base composite material stretchable layer (1) adopts hot and humid maintenance.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510188642.3A CN104762879A (en) | 2015-04-21 | 2015-04-21 | Jointless expansion structure of cement concrete bridge deck pavement layer |
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| CN201510188642.3A CN104762879A (en) | 2015-04-21 | 2015-04-21 | Jointless expansion structure of cement concrete bridge deck pavement layer |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105113406A (en) * | 2015-08-25 | 2015-12-02 | 王宗林 | Crack-proof bridge floor continuous structure for simple support system beam bridge |
| CN109293304A (en) * | 2018-10-16 | 2019-02-01 | 中铁第勘察设计院集团有限公司 | High ductility cement-based material and preparation method thereof |
| CN109485322A (en) * | 2018-12-14 | 2019-03-19 | 北京市住宅产业化集团股份有限公司 | A kind of high-performance protective mortar and preparation method thereof |
| CN109972499A (en) * | 2019-04-12 | 2019-07-05 | 浙江工业大学 | Seamless stretching structure and construction method among a kind of medium and small span freely-supported highway bridge |
| CN110804940A (en) * | 2019-11-18 | 2020-02-18 | 江苏韧强建筑科技有限公司 | Continuous structure of ultrahigh molecular weight polyethylene fiber reinforced ultrahigh ductility concrete bridge floor |
| CN111505251A (en) * | 2019-01-30 | 2020-08-07 | 南京交通职业技术学院 | Method for predicting strength of cement concrete |
| CN113880534A (en) * | 2021-12-01 | 2022-01-04 | 北京慕湖外加剂有限公司 | High-ductility concrete and preparation method thereof |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105113406A (en) * | 2015-08-25 | 2015-12-02 | 王宗林 | Crack-proof bridge floor continuous structure for simple support system beam bridge |
| CN109293304A (en) * | 2018-10-16 | 2019-02-01 | 中铁第勘察设计院集团有限公司 | High ductility cement-based material and preparation method thereof |
| CN109485322A (en) * | 2018-12-14 | 2019-03-19 | 北京市住宅产业化集团股份有限公司 | A kind of high-performance protective mortar and preparation method thereof |
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| CN110804940A (en) * | 2019-11-18 | 2020-02-18 | 江苏韧强建筑科技有限公司 | Continuous structure of ultrahigh molecular weight polyethylene fiber reinforced ultrahigh ductility concrete bridge floor |
| CN113880534A (en) * | 2021-12-01 | 2022-01-04 | 北京慕湖外加剂有限公司 | High-ductility concrete and preparation method thereof |
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