CN115094751A - Steel bridge deck pavement structure based on double-layer waterproof technology and pavement method thereof - Google Patents
Steel bridge deck pavement structure based on double-layer waterproof technology and pavement method thereof Download PDFInfo
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- CN115094751A CN115094751A CN202210584097.XA CN202210584097A CN115094751A CN 115094751 A CN115094751 A CN 115094751A CN 202210584097 A CN202210584097 A CN 202210584097A CN 115094751 A CN115094751 A CN 115094751A
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 70
- 239000010959 steel Substances 0.000 title claims abstract description 70
- 238000000034 method Methods 0.000 title claims abstract description 40
- 238000005516 engineering process Methods 0.000 title claims description 26
- 239000004576 sand Substances 0.000 claims abstract description 52
- 239000003822 epoxy resin Substances 0.000 claims abstract description 51
- 229920000647 polyepoxide Polymers 0.000 claims abstract description 51
- 239000004567 concrete Substances 0.000 claims abstract description 50
- 239000010881 fly ash Substances 0.000 claims abstract description 31
- 239000002245 particle Substances 0.000 claims abstract description 23
- 239000004575 stone Substances 0.000 claims abstract description 19
- 238000002156 mixing Methods 0.000 claims abstract description 15
- 230000008602 contraction Effects 0.000 claims abstract description 12
- 238000000576 coating method Methods 0.000 claims description 25
- 239000011248 coating agent Substances 0.000 claims description 19
- 239000004568 cement Substances 0.000 claims description 17
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 13
- 238000011049 filling Methods 0.000 claims description 12
- 238000003756 stirring Methods 0.000 claims description 12
- 239000011384 asphalt concrete Substances 0.000 claims description 8
- 239000000463 material Substances 0.000 claims description 8
- 229920005989 resin Polymers 0.000 claims description 8
- 239000011347 resin Substances 0.000 claims description 8
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 claims description 6
- 239000010426 asphalt Substances 0.000 claims description 5
- 238000004140 cleaning Methods 0.000 claims description 5
- 238000005520 cutting process Methods 0.000 claims description 5
- 238000003825 pressing Methods 0.000 claims description 5
- 238000005096 rolling process Methods 0.000 claims description 4
- 239000004902 Softening Agent Substances 0.000 claims description 3
- 239000000945 filler Substances 0.000 claims description 3
- 229910052500 inorganic mineral Inorganic materials 0.000 claims description 3
- 239000011707 mineral Substances 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 3
- 239000012257 stirred material Substances 0.000 claims description 3
- 239000002023 wood Substances 0.000 claims description 3
- 238000001035 drying Methods 0.000 claims description 2
- 238000010008 shearing Methods 0.000 abstract description 4
- 230000008569 process Effects 0.000 description 12
- 238000010276 construction Methods 0.000 description 7
- 238000010521 absorption reaction Methods 0.000 description 5
- 238000003892 spreading Methods 0.000 description 4
- 230000007480 spreading Effects 0.000 description 4
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 239000013521 mastic Substances 0.000 description 2
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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
- 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
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C11/00—Details of pavings
- E01C11/02—Arrangement or construction of joints; Methods of making joints; Packing for joints
- E01C11/04—Arrangement or construction of joints; Methods of making joints; Packing for joints for cement concrete paving
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C11/00—Details of pavings
- E01C11/02—Arrangement or construction of joints; Methods of making joints; Packing for joints
- E01C11/04—Arrangement or construction of joints; Methods of making joints; Packing for joints for cement concrete paving
- E01C11/06—Methods of making joints
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C7/00—Coherent pavings made in situ
- E01C7/08—Coherent pavings made in situ made of road-metal and binders
- E01C7/32—Coherent pavings made in situ made of road-metal and binders of courses of different kind made in situ
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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
- E01D19/08—Damp-proof or other insulating layers; Drainage arrangements or devices ; Bridge deck surfacings
- E01D19/083—Waterproofing of bridge decks; Other insulations for bridges, e.g. thermal ; Bridge deck surfacings
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D2101/00—Material constitution of bridges
- E01D2101/30—Metal
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Bridges Or Land Bridges (AREA)
- Road Paving Structures (AREA)
Abstract
The invention relates to a steel bridge deck pavement structure and a pavement method thereof, wherein the pavement structure comprises a steel bridge deck, a first waterproof layer is paved on the steel bridge deck, a second waterproof layer is paved on the surface of the first waterproof layer, a concrete bearing layer is paved on the surface of the second waterproof layer, and a wear layer is paved on the surface of the concrete bearing layer; the first waterproof layer is formed by mixing modified epoxy resin, fly ash particles and fine sand, and the thickness of the first waterproof layer is 4-8 mm; the second waterproof layer is formed by mixing modified epoxy resin and broken stone, and the thickness of the second waterproof layer is 8-12 mm; after the concrete bearing layer is paved, a plurality of contraction joints are formed on the surface of the concrete bearing layer, and fine sand is filled in the contraction joints; the invention solves the problems of poor waterproof performance of steel bridge deck pavement, easy decay of the steel bridge deck, poor shearing resistance and short service life of the bridge deck.
Description
Technical Field
The invention relates to the technical field of road and bridge engineering, in particular to a steel bridge deck pavement structure based on a double-layer waterproof technology and a pavement method thereof.
Background
The steel box girder has the unique advantages of large span, light weight, convenient construction and the like, and is widely applied, and compared with common pavement and cement concrete bridge deck pavement, the steel bridge deck pavement has more severe use conditions, thereby also providing higher requirements.
A Chinese patent with an authorization publication number of CN103122608B discloses a steel bridge deck pavement structure and a construction process based on a double-layer waterproof technology, wherein the steel bridge deck pavement structure based on the double-layer waterproof technology comprises a modified epoxy resin bonded gravel waterproof bonding layer, a cold-mixed modified epoxy resin mortar transition layer and an asphalt mastic gravel steel bridge deck pavement layer, and the steel bridge deck pavement structure comprises a modified epoxy resin bonded gravel waterproof bonding layer construction process, a cold-mixed modified epoxy resin mortar transition layer construction process and an asphalt mastic gravel pavement layer construction process, and has good road performances of skid resistance, high temperature resistance, rutting resistance, low noise, water seepage resistance, good overall stability, good driving safety performance, long service life and the like.
However, the modified epoxy resin bonded gravel waterproof bonding layer has the problems that the waterproof and energy absorption of the modified epoxy resin bonded gravel waterproof bonding layer are reduced faster along with the increase of the service life, and the gravel can directly contact the steel bridge deck to cause the steel bridge deck to be in contact with the external environment to decay, so that the inventor develops a pavement structure and a pavement method which have good waterproof performance, high strength and longer service life on the basis of the modified epoxy resin bonded gravel waterproof bonding layer.
Disclosure of Invention
One of the purposes of the invention is to provide a steel bridge deck pavement structure based on a double-layer waterproof technology aiming at the defects of the prior art, the first waterproof layer is arranged below the second waterproof layer, and the fly ash and the fine sand are added into the modified epoxy resin added into the first waterproof layer, so that the waterproof performance of the steel bridge deck is further improved, the corrosion of the external environment to the surface of the steel bridge deck is reduced, the bearing firmness of the bottom layer is also ensured due to the addition of the fly ash and the fine sand, water vapor is hardly avoided in the air near the steel bridge deck body in the construction process, and the fly ash exerts the water absorption property to further dry the steel bridge deck body in the pavement process.
The concrete technical solution is as follows:
the steel bridge deck pavement structure based on the double-layer waterproof technology comprises a steel bridge deck, wherein a first waterproof layer is paved on the steel bridge deck, a second waterproof layer is paved on the surface of the first waterproof layer, a concrete bearing layer is paved on the surface of the second waterproof layer, and a wear layer is paved on the surface of the concrete bearing layer;
the first waterproof layer is formed by mixing modified epoxy resin, fly ash particles and fine sand, and the thickness of the first waterproof layer is 4-8 mm; the second waterproof layer is formed by mixing modified epoxy resin and broken stones, and the thickness of the second waterproof layer is 8-12 mm;
after the concrete bearing layer is paved, a plurality of contraction joints are formed on the surface of the concrete bearing layer, and fine sand is filled in the contraction joints.
Preferably, the mass ratio of the modified epoxy resin to the fly ash particles to the fine sand in the first waterproof layer is 3: 1.2:0.8.
Preferably, the maximum nominal particle size of the crushed stones in the second waterproof layer is 4-6 mm.
Preferably, the concrete bearing layer is a flexible cement concrete bearing layer, and the flexible cement concrete bearing layer is prepared by cement, sand and stone mineral aggregate, water, an active softening agent and the like according to a proportion.
Preferably, the wear layer is a modified resin asphalt concrete layer which is composed of modified epoxy resin, asphalt, sand and silt filler.
The invention also aims to provide a steel bridge deck pavement method based on the double-layer waterproof technology aiming at the defects in the prior art.
The concrete technical solution is as follows:
the steel bridge deck paving method based on double-layer waterproof technology includes the following steps,
the method comprises the following steps: a material mixing procedure, namely pouring the fly ash particles and the fine sand into a stirring barrel according to the mass ratio and uniformly stirring, then pouring the heated and melted modified epoxy resin into the stirring barrel and uniformly mixing and stirring the modified epoxy resin with the fly ash particles and the fine sand for at least 2min, and transferring the stirred material into coating equipment;
step two: a first waterproof layer coating procedure, namely coating the mixture obtained in the first step on the surface of the steel bridge deck by coating equipment, wherein the coating thickness is 4-8 mm;
step three: a second waterproof layer coating process, wherein the first waterproof layer is kept stand for 2-3min after being coated, then modified epoxy resin is coated on the surface of the first waterproof layer, the coating thickness of the modified epoxy resin is 8-12mm, and crushed stone with the maximum nominal grain size of 4-6mm is uniformly spread on the surface of the first waterproof layer immediately after the coating;
step four: a flat plate light pressing procedure, wherein the paved broken stones are lightly pressed into the modified epoxy resin by using a wood flat plate;
step five: paving a concrete bearing layer, namely paving the stirred flexible cement concrete material by using a paver after the second waterproof layer is solidified, wherein the paving thickness is 20-35 mm;
step six: a vibrating and slotting process, wherein a vibrator is used for vibrating the paved flexible cement concrete material, the flexible cement concrete material is cured after the vibrating is finished, and shrinkage cracks are cut at intervals of 4-6m by a cutting machine after the curing, and the depth of the shrinkage cracks is 5-8 mm;
step seven: and filling fine sand into the cut shrinkage joint, wherein the fine sand is filled fully, and the vertical distance between the filling height and the shrinkage joint port is 1.5-2 mm.
Step eight: paving a wear layer, namely paving the modified resin asphalt concrete on the surface of the concrete bearing layer, wherein the paving thickness is 28-35mm, and repeatedly rolling by using a road roller after paving.
Preferably, in the second step, the steel bridge surface is subjected to rust removal and cleaning operation before the first waterproof layer is coated.
Preferably, the fly ash particles and fine sand in step one are subjected to a sufficient drying treatment before being mixed with the modified epoxy resin.
The invention has the beneficial effects that:
1. according to the invention, the first waterproof layer is arranged below the second waterproof layer, and the fly ash and the fine sand are added into the modified epoxy resin added into the first waterproof layer, so that the fly ash has strong water absorption property.
The invention sets a contraction joint on the concrete bearing layer, and fills fine sand in the contraction joint, the filling of the fine sand prevents the contraction joint from being damaged when the wearing layer is rolled, and the filling of the fine sand can release the water vapor or stress in the concrete bearing layer after the completion of the function of the contraction joint at the position after the pavement, and the distance of 1.5-2mm is reserved for the filling of the fine sand, so that the fine sand is prevented from being brought out to the surface of the concrete bearing layer to influence the pavement of the wearing layer when the wearing layer is paved.
In conclusion, the invention has the advantages of high waterproof performance, high strength, skid resistance, long service life of the road surface and the like, and is suitable for the technical field of road and bridge engineering.
Drawings
The invention is further described with reference to the accompanying drawings:
fig. 1 is a schematic structural view of a steel bridge deck pavement structure based on a double-layer waterproof technology in embodiment 1;
FIG. 2 is an enlarged schematic view of the structure at A in FIG. 1;
FIG. 3 is an enlarged view of the structure at B of FIG. 1;
fig. 4 is a schematic structural view of a steel bridge deck pavement structure based on a double-layer waterproof technology in embodiment 4.
Detailed Description
The technical scheme in the embodiment of the invention is clearly and completely explained by combining the attached drawings.
Example 1
As shown in fig. 1 to 3, the steel bridge deck pavement structure based on the double-layer waterproof technology comprises a steel bridge deck 1, wherein a first waterproof layer 2 is paved on the steel bridge deck 1, a second waterproof layer 3 is paved on the surface of the first waterproof layer 2, a concrete bearing layer 4 is paved on the surface of the second waterproof layer 3, and a wear layer 5 is paved on the surface of the concrete bearing layer 4;
the first waterproof layer 2 is formed by mixing modified epoxy resin, fly ash particles and fine sand, and the mass ratio of the modified epoxy resin to the fly ash particles to the fine sand is 3: 1.2:0.8, wherein the thickness of the first waterproof layer 2 is 4-8 mm; the second waterproof layer 3 is formed by mixing modified epoxy resin and crushed stone, the thickness of the second waterproof layer 3 is 8-12mm, and the maximum nominal grain size of the crushed stone is 4-6 mm;
after the concrete bearing layer 5 is paved, a plurality of contraction joints 41 are formed on the surface of the concrete bearing layer, fine sand is filled in the contraction joints 41, the concrete bearing layer 4 is a flexible cement concrete bearing layer, and the flexible cement concrete bearing layer is prepared by cement, sand mineral aggregate, water, an active softening agent and the like according to a proportion; the wearing layer 5 is a modified resin asphalt concrete layer which is composed of modified epoxy resin, asphalt, sand and silt filler.
The paving method of the steel bridge deck structure comprises the following process steps,
the method comprises the following steps: the method comprises the following steps of (1) burdening, namely pouring fly ash particles and fine sand into a stirring barrel according to a mass ratio, uniformly stirring, pouring the heated and melted modified epoxy resin into the stirring barrel, uniformly mixing and stirring with the fly ash particles and the fine sand for at least 2min, and transferring the stirred material into coating equipment, wherein the mass ratio of the modified epoxy resin to the fly ash particles to the fine sand is 3: 1.2:0.8, and the fly ash particles and the fine sand need to be fully dried before being mixed with the modified epoxy resin;
step two: a first waterproof layer coating process, namely coating the mixture obtained in the first step on the surface of the steel bridge deck by coating equipment, wherein the coating thickness is 4-8mm, and performing rust removal and cleaning operation on the steel bridge deck before the first waterproof layer is coated;
step three: a second waterproof layer coating process, wherein the first waterproof layer is kept stand for 2-3min after being coated, then modified epoxy resin is coated on the surface of the first waterproof layer, the coating thickness of the modified epoxy resin is 8-12mm, broken stones with the maximum nominal particle size of 4-6mm are uniformly spread on the surface of the first waterproof layer immediately after the coating, the broken stones are uniformly spread on the surface of the modified epoxy resin, and the coverage area of the broken stones accounts for 65-75% of the total area;
step four: a flat plate light pressing process, wherein the paved broken stones are lightly pressed into the modified epoxy resin by using a wood flat plate, the solidified broken stones and the modified epoxy resin are fused into a second waterproof layer, the pressing depth of the broken stones in each area is ensured to be generally consistent in the flat plate pressing process, the broken stones are not completely pressed into the modified epoxy resin, and a rough surface 31 is formed on the second waterproof layer;
step five: paving a concrete bearing layer, namely paving the stirred flexible cement concrete material by using a paver after the second waterproof layer is solidified, wherein the paving thickness is 20-35mm, and the flexible cement concrete material is well combined with the rough surface;
step six: vibrating and slotting, namely vibrating the paved flexible cement concrete by using a vibrator, curing the concrete after vibrating, cutting shrinkage cracks at intervals of 4-6m by using a cutting machine after curing, wherein the depth of the shrinkage cracks is 5-8mm, and the shrinkage cracks are arranged to guide the cracks when the concrete bearing layer shrinks so as not to generate irregular cracks;
step seven: filling fine sand into the cut shrinkage joints, wherein the filling height of the fine sand is 1.5-2mm from the vertical distance of the filling height to the shrinkage joint port, when a wear layer is paved on the surface of the concrete bearing layer, the modified resin asphalt concrete cannot enter the shrinkage joints due to particle size and fluidity problems, and the function of the shrinkage joints can be influenced even if the modified resin asphalt concrete is filled with the shrinkage joints, the filling of the fine sand prevents the shrinkage joints from being damaged when the wear layer is rolled, and the function of the shrinkage joints at the position after pavement is also finished, the fine sand can release water vapor or stress in the concrete bearing layer, and the filling of the fine sand keeps the distance of 1.5-2mm to avoid the fine sand being brought out to the surface of the concrete bearing layer to influence the pavement of the wear layer when the wear layer is paved.
Step eight: spreading a wear layer, namely spreading modified resin asphalt concrete on the surface of the concrete bearing layer, wherein the spreading thickness is 28-35mm, repeatedly rolling by using a road roller after spreading, and spraying a proper amount of clear water or an aqueous solution of an isolating agent in the rolling process to be atomized.
In this embodiment, the first waterproof layer is arranged below the second waterproof layer, the fly ash and the fine sand are added into the modified epoxy resin added into the first waterproof layer, the fly ash has strong water absorption, compared with the method of directly paving the second waterproof layer consisting of the modified epoxy resin and the broken stones on the steel bridge deck, the waterproof performance of the steel bridge deck can be further improved by adding the first waterproof layer, the corrosion of the external environment on the surface of the steel bridge deck is reduced, the bearing firmness of the bottom layer is also ensured due to the addition of the fly ash and the fine sand, water vapor is inevitably generated in the air near the steel bridge deck body in the construction process, and the fly ash exerts the water absorption of the fly ash to further dry the steel bridge deck body in the paving process.
Example 2
The steel bridge deck pavement structure based on the double-layer waterproof technology in the embodiment is different from the steel bridge deck pavement structure in the embodiment 1 in that a first waterproof layer is formed by mixing fly ash particles, fine sand and modified epoxy resin, wherein the mass ratio of the modified epoxy resin to the fly ash particles to the fine sand is 2.5: 1.5:1, and the other structures are the same as example 1.
In the steel bridge deck paving method based on the double-layer waterproof technology, except for the step one, the mass ratio of the modified epoxy resin, the fly ash particles and the fine sand is adjusted to be 2.5: 1.5:1, otherwise the same as example 1.
Example 3
In the steel bridge deck pavement structure based on the double-layer waterproof technology in the embodiment, only the modified epoxy resin is contained in the first waterproof layer, the pavement thickness is the same as that in embodiment 1, and other structures are also the same as that in embodiment 1.
The steel bridge deck pavement method based on the double-layer waterproof technology in the embodiment is different from the embodiment 1 in that the step one is omitted, modified epoxy resin with the thickness of 4-8mm is directly coated on the surface of the steel bridge deck which is subjected to the rust removal and cleaning operation, and other steps are the same as the embodiment 1.
Example 4
As shown in fig. 4, the steel bridge deck pavement structure based on the double-layer waterproof technology in this embodiment is different from embodiment 1 in that a first waterproof layer is not provided, and a second waterproof layer is directly paved on the steel bridge deck surface on which the rust removal and cleaning operation is completed, and the other structures are the same as embodiment 1.
The steel bridge deck paving method based on the double-layer waterproof technology in the embodiment is different from the method in the embodiment 1 in that the step one and the step two are omitted, the second waterproof layer coating process is directly carried out after the rust removal operation is finished on the steel bridge deck, and the other steps and processes are the same as the embodiment 1.
Under the condition that does not set up first waterproof layer, the second waterproof layer also has better waterproof performance in the earlier stage of using, but steel bridge road surface rolls along with long-time use, and the rubble in the second waterproof layer slides or pierces through second waterproof layer and directly touches steel bridge floor surface, produces the gap and makes steel bridge floor surface and outside air steam contact produce the rusty possibility of corroding and progressively increase.
The ratio of the components of the fly ash and the fine sand in the first waterproof layer in example 2 is higher, example 1 is relatively more excellent in waterproof performance on the basis of considering the shearing resistance of the layer surface in a high-temperature state, example 2 is higher in strength, the shearing resistance in the high-temperature state is higher but the waterproof performance is slightly poor, example 3 is obviously poor in strength and poor in shearing resistance between smooth steel bridge surfaces, and example 4 is rapid in reduction of the waterproof performance over time as described above.
To sum up, the setting of first waterproof layer has set up the buffer layer that possesses certain intensity together between second waterproof layer and steel bridge face, further improves the life that waterproof performance improves the steel bridge face when guaranteeing road surface strength and shear capacity.
In the description of the present invention, it is to be understood that the terms "front-back", "left-right", and the like indicate orientations or positional relationships based on those shown in the drawings, and are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or component must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the invention.
Of course, in this disclosure, those skilled in the art will understand that the terms "a" and "an" should be interpreted as "at least one" or "one or more," i.e., in one embodiment, a number of an element may be one, and in another embodiment, a number of the element may be more, and the terms "a" and "an" should not be interpreted as limiting the number.
While the invention has been described with reference to specific preferred embodiments, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the claims.
Claims (8)
1. The steel bridge deck pavement structure based on the double-layer waterproof technology comprises a steel bridge deck (1) and is characterized in that a first waterproof layer (2) is paved on the steel bridge deck (1), a second waterproof layer (3) is paved on the surface of the first waterproof layer (2), a concrete bearing layer (4) is paved on the surface of the second waterproof layer (3), and a wear layer (5) is paved on the surface of the concrete bearing layer (4);
the first waterproof layer (2) is formed by mixing modified epoxy resin, fly ash particles and fine sand, and the thickness of the first waterproof layer (2) is 4-8 mm; the second waterproof layer (3) is formed by mixing modified epoxy resin and broken stones, and the thickness of the second waterproof layer (3) is 8-12 mm;
after the concrete bearing layer (4) is paved, a plurality of contraction joints (41) are formed on the surface of the concrete bearing layer, and fine sand is filled in the contraction joints (41).
2. The steel bridge deck pavement structure based on double-layer waterproof technology according to claim 1, characterized in that: the mass ratio of the modified epoxy resin to the fly ash particles to the fine sand in the first waterproof layer (2) is 3: 1.2:0.8.
3. The steel bridge deck pavement structure based on double-layer waterproof technology according to claim 1, characterized in that: the maximum nominal grain size of the broken stones in the second waterproof layer (3) is 4-6 mm.
4. The steel bridge deck pavement structure based on double-layer waterproof technology according to claim 1, characterized in that: the concrete bearing layer (4) is a flexible cement concrete bearing layer which is prepared by cement, sand mineral aggregate, water, an active softening agent and the like according to a proportion.
5. The steel bridge deck pavement structure based on double-layer waterproof technology according to claim 1, characterized in that: the wear layer (5) is a modified resin asphalt concrete layer which is composed of modified epoxy resin, asphalt, sand and sand fillers.
6. A steel bridge deck pavement method based on a double-layer waterproof technology is characterized by comprising the following steps: comprises the following process steps of the following steps,
the method comprises the following steps: a material mixing procedure, namely pouring the fly ash particles and the fine sand into a stirring barrel according to the mass ratio and uniformly stirring, then pouring the heated and melted modified epoxy resin into the stirring barrel and uniformly mixing and stirring the modified epoxy resin with the fly ash particles and the fine sand for at least 2min, and transferring the stirred material into coating equipment;
step two: a first waterproof layer coating process, namely coating the mixture obtained in the first step on the surface of the steel bridge deck (1) through coating equipment, wherein the coating thickness is 4-8 mm;
step three: a second waterproof layer coating process, wherein the first waterproof layer is kept stand for 2-3min after being coated, then modified epoxy resin is coated on the surface of the first waterproof layer, the coating thickness of the modified epoxy resin is 8-12mm, and crushed stone with the maximum nominal grain size of 4-6mm is uniformly spread on the surface of the first waterproof layer immediately after the coating;
step four: a flat plate light pressing procedure, wherein the paved gravels are lightly pressed into the modified epoxy resin by using a wood flat plate;
step five: paving the concrete bearing layer, namely paving the stirred flexible cement concrete material by using a paver after the second waterproof layer is solidified, wherein the paving thickness is 20-35 mm;
step six: vibrating and slotting, namely vibrating the paved flexible cement concrete by using a vibrator, curing the concrete after the vibration is finished, and cutting shrinkage cracks at intervals of 4-6m by using a cutting machine after the curing, wherein the depth of the shrinkage cracks is 5-8 mm;
step seven: and filling fine sand into the cut shrinkage joint, wherein the fine sand is filled fully, and the vertical distance between the filling height and the shrinkage joint port is 1.5-2 mm.
Step eight: paving a wear layer, namely paving the modified resin asphalt concrete on the surface of the concrete bearing layer, wherein the paving thickness is 28-35mm, and repeatedly rolling by using a road roller after paving.
7. The steel bridge deck pavement method based on the double-layer waterproof technology according to claim 6, characterized in that: and in the second step, the steel bridge deck is subjected to rust removal and cleaning operation before the first waterproof layer is coated.
8. The steel bridge deck pavement method based on the double-layer waterproof technology according to claim 6, wherein the steel bridge deck pavement method comprises the following steps: and (3) fully drying the fly ash particles and the fine sand in the step one before mixing with the modified epoxy resin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210584097.XA CN115094751A (en) | 2022-05-27 | 2022-05-27 | Steel bridge deck pavement structure based on double-layer waterproof technology and pavement method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210584097.XA CN115094751A (en) | 2022-05-27 | 2022-05-27 | Steel bridge deck pavement structure based on double-layer waterproof technology and pavement method thereof |
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