CN105401519B - A kind of steel box girder bridge floor paving structure and method for paving with the capability of antidetonance - Google Patents

A kind of steel box girder bridge floor paving structure and method for paving with the capability of antidetonance Download PDF

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Publication number
CN105401519B
CN105401519B CN201510946264.0A CN201510946264A CN105401519B CN 105401519 B CN105401519 B CN 105401519B CN 201510946264 A CN201510946264 A CN 201510946264A CN 105401519 B CN105401519 B CN 105401519B
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gfrp
layer
concrete
paving
steel box
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CN105401519A (en
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刘亚玲
耿少波
薛建英
靳小俊
刘玉存
王万月
张洪萍
郑亮
王元龙
李建军
董彦莉
郭宏
韩云山
刘兰
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North University of China
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North University of China
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    • EFIXED CONSTRUCTIONS
    • E01CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01DCONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
    • E01D19/00Structural or constructional details of bridges
    • E01D19/12Grating or flooring for bridges; Fastening railway sleepers or tracks to bridges
    • E01D19/125Grating or flooring for bridges
    • EFIXED CONSTRUCTIONS
    • E01CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01DCONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
    • E01D21/00Methods or apparatus specially adapted for erecting or assembling bridges

Abstract

The invention provides a kind of steel box girder bridge floor paving structure with the capability of antidetonance and method for paving, belong to technical field of traffic transportation and science of bridge building protection field, it is bituminous concrete wearing course that the structure uses upper strata, lower floor is GFRP composite concrete antiknock pave-load layers, set up defences above steel box beam orthotropic deck slab (1) water layer (2), tack coat (3) is set above waterproof layer (2), the top of lower tack coat (3) is GFRP composite concrete antiknocks pave-load layer (4), the top of GFRP composite concrete antiknocks pave-load layer (4) is upper tack coat (5), the top of upper tack coat (5) is bituminous concrete wearing course (6).Comprise the following steps:A. Steel Bridge Deck derusting by sandblasting b. carries out anticorrosive coating treatment to steel bridge deck, applied on spread waterproof layer c. waterproof layers and plant lower tack coat d. colligations GFRP glass fiber reinforcement muscle nets, then pour high-strength and high-ductility Light-weight composite concrete e. to vibrate, conserve completion, concrete layer upper surface and paste GFRP glass fiber reinforcement thin plate f. and lay coarse sand in the contact surface of GFRP thin plates and asphalt mixture surfacing, tack coat g. asphalts concrete abrasion layer in spread.

Description

A kind of steel box girder bridge floor paving structure and method for paving with the capability of antidetonance
Technical field
There is the capability of antidetonance the present invention relates to a kind of steel box girder bridge floor paving layer structure and method for paving, more particularly to one kind Steel box girder bridge floor paving layer structure and method for paving, belong to technical field of traffic transportation and science of bridge building protection field.
Background technology
Bridge structure especially urban viaduct, viaduct, bridge spanning the sea, belong to opening public transit facility, at it During military service, there is larger hazardous materials transportation vehicle blast or terrorist ignites car bomb or case above bridge floor Bag bomb causes the risk of structural failure and extensive casualties.In bridge structure, most commonly seen one kind is exactly steel case Girder construction, by Orthotropic Steel Bridge Deck, ribbed stiffener, diaphragm plate, the composition such as midfeather.Deck thickness is thin, and rigidity is small, and one As deck installation structure typically only consider that the load of dispersion wheel protects floorings, without resistance blast impulse Effect, when Blast Load is met with, Orthotropic Steel Bridge Deck will likely occur METHOD FOR LARGE DEFORMATION ELASTOPLASTIC, or even it is cracking or Cut, causes bridge structure that local failure or total Collapse occur.At present, existing highway bridge specification not yet considers that blast impulse is made With, to bridge structure antiknock in terms of research be focusing more under bridge to the destruction of bridge pier or to the overall destruction of bridge structure, The blast resistant measures research taken the blast of bridge floor top is little, and to reduce steel box girder, especially steel bridge deck up explodes Damage and destruction under load action, propose a kind of steel box girder bridge floor paving layer structure with the capability of antidetonance, by this paving Rotating fields are filled to weaken destroying infection of the Blast Load to substructure.
The content of the invention
It is an object of the invention to overcome weak point present in above-mentioned technology, there is provided a kind of steel with the capability of antidetonance Box girder bridge floor paving layer structure and method for paving.
To reach above-mentioned purpose, the technical solution adopted by the present invention is:
A kind of steel box girder bridge floor paving structure with the capability of antidetonance, sets in the top of steel box beam orthotropic deck slab 1 Tack coat 3 is set in waterproof layer 2, the top of waterproof layer 2, and the top of lower tack coat 3 is GFRP- composite concrete antiknocks pave-load layer 4, The top of GFRP- composite concrete antiknocks pave-load layer 4 is upper tack coat 5, and the top of upper tack coat 5 is bituminous concrete wearing course 6.The GFRP- composite concretes antiknock pave-load layer by configure GFRP muscle nets high-strength and high-ductility Light-weight composite concrete layer and GFRP glass fiber reinforcements thin plate is constituted, and the GFRP glass fiber reinforcements thin plate is pasted on the high-strength and high-ductility lightweight and is combined Concrete surface, the high-strength and high-ductility Light-weight composite concrete is using following proportioning(Weight portion):
Cement 489;
Sand 602;
Coarse aggregate 870;
Water 160;
Glass fibre 50;
Steel fibre 150;
EPS particles 20;
SILICA FUME 145;
Early strength and high effect water reduction agent 25;
Swelling agent 30.
Further, the bituminous concrete wearing course by 20mm OGFC-13 open gradations drainage asphalt abrasion upper layer+ 20mm modified asphalt concrete SMA-10 pitches abrasion cutting optimal composition.
Further, the GFRP glass fiber reinforcements thin plate thickness 2mm, main component is alkali-free glass fibre.
Further, the configuration mode of the GFRP muscle net is single-layer bidirectional GFRP glass fiber reinforcement muscle nets.It is described GFRP glass fiber reinforcement muscle net is located at GFRP- composite concrete antiknocks pave-load layer middle part, GFRP glass fiber reinforcement muscle diameters 10mm, tensile strength standard value is not less than 600MPa, and grid spacing is not more than 150mm × 150mm.
Further, the EPS grain diameters are 1 mm, and apparent density is 20 kg/m3.
The present invention is also further, a kind of method for paving of the steel box girder bridge floor paving structure with the capability of antidetonance, including with Under mat formation step:
A. Steel Bridge Deck derusting by sandblasting;
B. anticorrosive coating treatment, spread waterproof layer are carried out to steel bridge deck;
C. applied on waterproof layer and plant lower tack coat;
D. colligation GFRP muscle net, then pours high-strength and high-ductility Light-weight composite concrete;
E. vibrate, conserve completion, concrete layer upper surface stickup GFRP glass fiber reinforcement thin plates;
F. the contact surface in GFRP thin plates and asphalt mixture surfacing lays coarse sand, tack coat in spread;
G. asphalt concrete abrasion layer.
Further, lower tack coat be two-layer modified epoxy binding agent, ground floor 0.2~0.3mm modified epoxy binding agents, On spread the alloyed steel sand of 0.3~0.6mm;The second layer 0.4~0.6mm modified epoxy binding agents, above spread 1.18~2.36mm Rubble.
Further, it is enhancing GFRP thin plates and the bonding of bituminous concrete wearing course, GFRP thin plates and asphalt mixture surfacing Contact surface laying particle diameter 2 ~ 4.75mm coarse sand, upper bonding layer material is to dispense 1kg/m2 modified emulsifying asphalts.
Further, high-strength and high-ductility lightweight concrete using layering grouting it is compound with vibration pour forming method.
Further, to improve the uniformity of concrete batching system and avoiding isolation, using super plasticizer and stirring is extended Time.
Further, to make fiber be distributed good and avoid conglomeration, when fiber is added using slow dispersion addition side Method.
It is an advantage of the invention that:
The present invention is advantageous in that proposing to consider anti-explosion design in steel box girder bridge floor paving layer structure first, there is provided A kind of steel box girder bridge floor paving layer structure and method for paving with the capability of antidetonance, by designing GFRP- composite concrete antiknocks Pave-load layer, inside sets single-layer bidirectional GFRP muscle net and 2mm thickness GFRP glass fiber reinforcement thin plates are pasted in upper surface, and selects high-strength height Toughness Light-weight composite concrete, it is greatly slow so as to reach intensity, toughness and the shock resistance antiknock ability of enhancing steel box-girder pave-load layer The pressure of explosion wave is solved, provides a kind of simple and practical for bridge box-beam structure improves its resistance bridge floor top blast impulse ability Method and thinking.Specifically:
(1)GFRP glass fiber reinforcement thin plate intensity is high, with preferable corrosion resistance and good incubation and thermal insulation function, Impact resistance is strong and high temperature under do not burn, can be as being anti-impact force and the first fire-retardant defence line.
(2)65mm thickness high-strength and high-ductility Light-weight composite concrete concrete layers middle part is provided with single-layer bidirectional GFRP glass fibres Enhancing muscle net, using GFRP muscle it is high-strength, it is fire-retardant the characteristics of, replace common bar-mat reinforcement, as anti-impact force and fire-retardant second Defence line.
(3)The mixed compound solidifying soil antiknock pave-load layers of GFRP- select high-strength and high-ductility lightweight concrete, add a certain proportion of steel Fiber, glass fibre and EPS particles and SILICA FUME, and replace coarse aggregate with EPS particles part.EPS particles can mitigate coagulation The deadweight of soil, SILICA FUME can significantly improve the adhesive property of EPS particles and cement slurry, improve EPS lightweight concrete pressure resistances Degree, and mixing of steel fiber and glass fibre can then significantly improve its shrinkage performance, reach the purpose of high-strength, high-ductility and lightweight, into It is the 3rd defence line of anti-impact force antiknock.
(4)The adhesive property that GFRP- is mixed between compound solidifying soil antiknock pave-load layer and steel plate is good, and shearing strength is up to 2.0 MPa, elastic modelling quantity is less than 30GPa, and bent toughness is very big, will not up and down being disturbed with pontic under regular service conditions and be broken.
Brief description of the drawings
Fig. 1 is the structural representation of the steel box girder bridge floor paving layer with the capability of antidetonance that the present invention is provided.
Fig. 2 is GFRP- composite concrete antiknock pave-load layer structural representations.
In figure, 1, steel box girder bridge panel 2, waterproof layer 3, lower tack coat 4, GFRP- composite concrete antiknocks pave-load layer 5, on Tack coat 6, bituminous concrete wearing course 7, high-strength and high-ductility Light-weight composite concrete 8, GFRP muscle net 9, GFRP glass fibres increase Strong thin plate.
Specific embodiment
Embodiments of the invention are described in further detail below in conjunction with the accompanying drawings.
Rotating fields of mating formation of the invention are by upper strata for 40mm bituminous concretes wearing course and lower floor are that the thick GFRP- of 67mm are answered Close concrete antiknock pave-load layer composition.GFRP- composite concrete antiknock pave-load layers are antiknock core layers, by the thick configuration GFRP of 65mm High-strength and high-ductility Light-weight composite concrete and surface mount 2mm thickness GFRP glass fiber reinforcements the thin plate composition of muscle net.Such as accompanying drawing 1 Shown, the paving structure sequentially consists of steel box girder bridge panel 1, waterproof layer 2, lower tack coat 3, GFRP- composite concretes Antiknock pave-load layer 4, upper tack coat 5, bituminous concrete wearing course 6.Wherein, as shown in Figure 2, the GFRP- composite concretes Antiknock pave-load layer is by configuring the high-strength and high-ductility Light-weight composite concrete layer 7 and GFRP glass fiber reinforcements thin plate 9 of GFRP muscle net 8 Composition, the GFRP glass fiber reinforcements thin plate 9 is pasted on 7 surface of high-strength and high-ductility Light-weight composite concrete layer, described High-strength and high-ductility Light-weight composite concrete layer is using following proportioning(Weight portion):
Cement 489;
Sand 602;
Coarse aggregate 870;
Water 160;
Glass fibre 50;
Steel fibre 150;
EPS particles 20;
SILICA FUME 145;
Early strength and high effect water reduction agent 25;
Swelling agent 30.
The method for paving of the above-mentioned steel box girder bridge floor paving layer structure with the capability of antidetonance, comprises the following steps and constructs It is required that:(a)Steel Bridge Deck derusting by sandblasting, it is desirable to cleannes reach Sa2.5 grades, roughness reach 50~100 μm;(b)To steel bridge Panel carries out anticorrosive coating treatment, spread waterproof layer;(c)Coating two-layer modified epoxy binding agent on waterproof layer, ground floor 0.2~ 0.3mm modified epoxy binding agents, above spread the alloyed steel sand of 0.3~0.6mm;0.4~0.6mm of second layer modified epoxies glue Knot agent, above spreads the rubble of 1.18~2.36mm;(d)Colligation single-layer bidirectional GFRP glass fiber reinforcement muscle nets, it is multiple positioned at GFRP- Concrete antiknock pave-load layer middle part is closed, GFRP muscle diameter 10mm, tensile strength standard value is not less than 600MPa, grid spacing 150mm × 150mm, then pours 65mm thickness high-strength and high-ductility Light-weight composite concretes;(e)Vibrate, conserve completion, strong concrete Degree is reached after 80%, and 2mm thickness GFRP glass fiber reinforcement thin plates are pasted in concrete surface;(f)GFRP thin plates spread with pitch The coarse sand of the 2 ~ 4.75mm of contact surface laying particle diameter of layer is filled, binding material is spreading 1kg/m2Modified emulsifying asphalt(g)Laying 40mm thickness bituminous concrete wearing courses.
Above-mentioned 40mm thickness bituminous concrete wearing course by 20mm OGFC-13 open gradations drainage asphalt abrasion upper layer+ 20mm modified asphalt concrete SMA-10 cutting optimals are constituted.The wearing course has drainage good, antiskid, Rut resistance and noise reduction work( Effect, can provide stabilization, smooth track for vehicle, meet normal vehicle operation requirement.
GFRP- composite concrete antiknock pave-load layer surface mount GFRP glass fiber reinforcements thin plate thickness 2mm, main component is Alkali-free glass fibre.Glass fiber reinforcement thin plate has intensity high, light weight, high temperature resistant, the performance such as shock resistance.GFRP- is combined Concrete antiknock pave-load layer thickness 65mm, inside configuration single-layer bidirectional GFRP muscle nets.GFRP muscle has that tensile strength is high, corrosion resistance Can be excellent, lightweight the features such as.GFRP muscle net is located at GFRP- composite concrete antiknocks pave-load layer middle part, as shown in Figure 2, GFRP muscle diameter 10mm, tensile strength standard value is not less than 600MPa, grid spacing 150mm × 150mm.
Composite concrete is high-strength and high-ductility Light-weight composite concrete, unit weight in GFRP- composite concrete antiknock pave-load layers Less than 2000 kg/m3, elastic modelling quantity is more than 27GPa, and compression strength is more than 70Pa, and rupture strength is more than 18MPa, breaking resistance More than 7.5MPa.Steel fibre and glass fibre, efficient mineral admixture etc. are introduced to its tough-increased and reinforced modification;To reduce concrete Deadweight, is suitably added EPS particles, and particle diameter is 1 mm, and apparent density is 20 kg/m3.EPS particles have preferable energy-absorbing function With antiknock ability, explosion wave by energy after the complex coagulation soil layer containing EPS particles occur it is huge subtract, safeguard structure In lower floor protected.
The above is the preferred embodiment of the present invention, it is noted that for those skilled in the art For, under the premise without departing from the principles of the invention, some improvements and modifications can also be made, these improvements and modifications are also considered as Protection scope of the present invention.

Claims (10)

1. a kind of steel box girder bridge floor paving structure with the capability of antidetonance, it is characterised in that in steel box beam orthotropic deck slab (1)Top set up defences water layer(2), waterproof layer(2)Top set tack coat(3), lower tack coat(3)Top for GFRP- it is multiple Close concrete antiknock pave-load layer(4), GFRP- composite concrete antiknock pave-load layers(4)Top be upper tack coat(5), upper bonding Layer(5)Top be bituminous concrete wearing course(6), the GFRP- composite concretes antiknock pave-load layer is by configuring GFRP muscle nets High-strength and high-ductility Light-weight composite concrete layer and GFRP glass fiber reinforcements thin plate composition, the GFRP glass fiber reinforcements are thin Plate is pasted on the high-strength and high-ductility Light-weight composite concrete layer surface, and the high-strength and high-ductility Light-weight composite concrete is using such as Lower weight:
Cement 489;
Sand 602;
Coarse aggregate 870;
Water 160;
Glass fibre 50;
Steel fibre 150;
EPS particles 20;
SILICA FUME 145;
Early strength and high effect water reduction agent 25;
Swelling agent 30;
The GFRP glass fiber reinforcements thin plate thickness 2mm, main component is alkali-free glass fibre.
2. the steel box girder bridge floor paving structure with the capability of antidetonance according to claim 1, it is characterised in that the pitch Concrete abrasion layer is by under 20mmOGFC-13 open gradations drainage asphalt abrasion upper layer+20mm modified asphalt concretes SMA-10 Surface layer is constituted.
3. the steel box girder bridge floor paving structure with the capability of antidetonance according to claim 1, it is characterised in that the GFRP The configuration mode of muscle net is single-layer bidirectional GFRP glass fiber reinforcement muscle nets, and the GFRP glass fiber reinforcements muscle net is located at GFRP- composite concrete antiknocks pave-load layer middle part, GFRP glass fiber reinforcement muscle diameter 10mm, tensile strength standard value is not less than 600MPa, grid spacing is not more than 150mm × 150mm.
4. the steel box girder bridge floor paving structure with the capability of antidetonance according to claim 1, it is characterised in that the EPS Grain diameter is 1mm, and apparent density is 20kg/m3
5. a kind of method for paving of the steel box girder bridge floor paving structure with the capability of antidetonance according to claim 1, it is special Levy is to include following step of mating formation:
A. Steel Bridge Deck derusting by sandblasting;
B. anticorrosive coating treatment, spread waterproof layer are carried out to steel bridge deck;
C. applied on waterproof layer and plant tack coat;
D. colligation GFRP muscle net, then pours high-strength and high-ductility Light-weight composite concrete;
E. vibrate, conserve completion, concrete layer upper surface stickup GFRP glass fiber reinforcement thin plates;
F. the contact surface in GFRP thin plates and asphalt mixture surfacing lays coarse sand, tack coat in spread;
G. asphalt concrete abrasion layer.
6. the method for paving of steel box girder bridge floor paving structure according to claim 5, it is characterised in that lower tack coat is two Layer modified epoxy binding agent, ground floor 0.2~0.3mm modified epoxy binding agents above spread the alloyed steel sand of 0.3~0.6mm;Second Layer 0.4~0.6mm modified epoxy binding agents, above spread the rubble of 1.18~2.36mm.
7. the method for paving of steel box girder bridge floor paving structure according to claim 5, it is characterised in that for enhancing GFRP is thin The bonding of plate and bituminous concrete wearing course, GFRP thin plates are thick with the 2 ~ 4.75mm's of contact surface laying particle diameter of asphalt mixture surfacing Sand, binding material is spreading 1kg/m2Modified emulsifying asphalt.
8. the method for paving of steel box girder bridge floor paving structure according to claim 5, it is characterised in that high-strength and high-ductility is light Matter concrete using layering grouting it is compound with vibration pour forming method.
9. the method for paving of steel box girder bridge floor paving structure according to claim 5, it is characterised in that be to improve concrete The uniformity of mix simultaneously avoids isolation, using super plasticizer and extends mixing time.
10. the method for paving of steel box girder bridge floor paving structure according to claim 5, it is characterised in that to make fiber point Cloth is good and avoids conglomeration, when fiber is added using slow dispersion Adding Way.
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CN108316142B (en) * 2018-02-06 2019-05-31 李纪芳 A kind of paving structure and method of Steel Bridge

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