CN115125840A - Construction method of modified high-strength concrete corrugated roof combined bridge deck - Google Patents
Construction method of modified high-strength concrete corrugated roof combined bridge deck Download PDFInfo
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- CN115125840A CN115125840A CN202210599946.9A CN202210599946A CN115125840A CN 115125840 A CN115125840 A CN 115125840A CN 202210599946 A CN202210599946 A CN 202210599946A CN 115125840 A CN115125840 A CN 115125840A
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- 239000011372 high-strength concrete Substances 0.000 title claims abstract description 36
- 238000010276 construction Methods 0.000 title claims abstract description 34
- 239000004567 concrete Substances 0.000 claims abstract description 65
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 52
- 239000010959 steel Substances 0.000 claims abstract description 52
- 238000000034 method Methods 0.000 claims abstract description 13
- 239000010426 asphalt Substances 0.000 claims description 11
- 239000000463 material Substances 0.000 claims description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 10
- 238000005485 electric heating Methods 0.000 claims description 9
- 239000011148 porous material Substances 0.000 claims description 9
- 239000007788 liquid Substances 0.000 claims description 7
- 238000003860 storage Methods 0.000 claims description 7
- 238000009826 distribution Methods 0.000 claims description 6
- 238000010438 heat treatment Methods 0.000 claims description 6
- 239000002002 slurry Substances 0.000 claims description 5
- 239000004575 stone Substances 0.000 claims description 5
- 238000007689 inspection Methods 0.000 claims description 4
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 claims description 3
- 238000004873 anchoring Methods 0.000 claims description 3
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 claims description 3
- 229910001861 calcium hydroxide Inorganic materials 0.000 claims description 3
- 235000011116 calcium hydroxide Nutrition 0.000 claims description 3
- 239000000920 calcium hydroxide Substances 0.000 claims description 3
- 239000004568 cement Substances 0.000 claims description 3
- 239000003795 chemical substances by application Substances 0.000 claims description 3
- 238000013461 design Methods 0.000 claims description 3
- 239000004744 fabric Substances 0.000 claims description 3
- 239000010881 fly ash Substances 0.000 claims description 3
- 238000009434 installation Methods 0.000 claims description 3
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 claims description 3
- 239000011159 matrix material Substances 0.000 claims description 3
- 239000003607 modifier Substances 0.000 claims description 3
- 239000000843 powder Substances 0.000 claims description 3
- 238000003825 pressing Methods 0.000 claims description 3
- 230000002787 reinforcement Effects 0.000 claims description 3
- 239000004576 sand Substances 0.000 claims description 3
- 238000005507 spraying Methods 0.000 claims description 3
- 238000005336 cracking Methods 0.000 abstract description 3
- 238000009415 formwork Methods 0.000 abstract 1
- 238000003466 welding Methods 0.000 description 13
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 5
- 239000011440 grout Substances 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
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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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- 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
- C04B28/02—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 containing hydraulic cements other than calcium sulfates
-
- 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
- C04B40/00—Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability
- C04B40/02—Selection of the hardening environment
- C04B40/024—Steam hardening, e.g. in an autoclave
-
- 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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- 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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
- C04B2111/0075—Uses not provided for elsewhere in C04B2111/00 for road construction
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- Structural Engineering (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
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Abstract
The invention relates to a construction method of a modified high-strength concrete corrugated roof combined bridge deck, which comprises the following process steps: s1, laying profiled sheets, after concrete curing at the bridge deck slab, the web linings at two sides of the middle fulcrum and the end beam support part in the previous stage is finished, firstly laying open profiled sheets between a cantilever and a box of the steel box beam respectively, and then installing a plug board at the end part of the open profiled sheets; s2, installing steel bars, anchor backing plates and prestressed ducts; s3, pouring the modified high-strength concrete, and pouring the modified high-strength concrete after the side formwork is installed; and S4, curing the concrete, and after the concrete is poured, introducing 45-55 ℃ steam through a steam pipeline to perform curing for 6-12 hours, wherein the air pressure is controlled to be 1.0-1.2 Mpa. The corrugated top plate and the concrete structure layer are reliably connected, the fatigue cracking possibility of the steel bridge deck is reduced, and the construction quality of the bridge deck is obviously improved.
Description
Technical Field
The invention relates to the field of bridge deck structure construction, in particular to a construction method of a modified high-strength concrete corrugated roof combined bridge deck.
Background
The steel bridge deck has the advantages of light dead weight, high bearing capacity, convenient manufacture, convenient construction and the like, is widely applied to large and mid-span bridge engineering, but has thin and obviously different longitudinal and transverse stress performance and local rigidity as the orthotropic steel bridge deck
The wallboard structure, under the effect of reciprocal wheel load part welding construction details bear higher stress amplitude because of stress concentration, and inevitable initial welding defect, welding residual stress and manufacturing machining error wait unfavorable factor have further aggravated the risk that steel bridge panel takes place fatigue crack, have become the key technological problem that restricts the sustainable development of steel structure bridge.
In prior art, the steel bridge deck receives the local deformation of steel bridge deck board great under the wheel load effect, and the layer of mating formation all has higher local stress with the adhesion layer, and under the coupling effect of environmental factors such as reciprocal wheel load and high temperature, high humidity, the steel bridge deck board is mated formation the layer and is easily taken place diseases such as fracture, rut, delaminating and hug, has not only shown the quality of service that has reduced bridge structures, has increased operation and maintenance cost by a wide margin, and further aggravated the risk that the steel bridge deck board takes place fatigue crack.
Therefore, research and development of a corrugated roof combined bridge deck structure and a construction method are needed to solve the two problems of fatigue cracking of a steel bridge deck and easy damage of bridge deck pavement, and further improve the construction quality of the combined bridge deck structure.
Disclosure of Invention
Aiming at the problems in the prior art, the invention aims to provide a corrugated roof combined bridge deck structure and a construction method, wherein the corrugated roof and a concrete structure layer are reliably connected, the fatigue cracking possibility of a steel bridge deck is reduced, and the construction quality of the bridge deck is obviously improved.
The above object of the present invention is achieved by the following technical solutions:
a construction method of a modified high-strength concrete corrugated roof combined bridge deck comprises the following process steps:
s1, laying profiled sheets, after concrete curing at the bridge deck slab, the web linings at two sides of the middle fulcrum and the end beam support part in the previous stage is finished, firstly laying open profiled sheets between a cantilever and a box of the steel box beam respectively, and then installing a plug board at the end part of the open profiled sheets;
s2, installing the steel bars, the anchor backing plate and the prestressed duct, and specifically comprising the following operation steps:
(1) popping side lines of a steel bar framework at the periphery of the open profiled steel sheet, controlling the spacing of steel bars by adopting a steel bar positioning jig, and then installing and binding the steel bars in the open profiled steel sheet;
(2) in the process of installing the steel reinforcement framework piece, an anchor backing plate is installed according to a preset position, and the requirement of the installation position of the anchor backing plate is ensured;
(3) the prestressed duct is a corrugated pipe, a pre-embedded anchor ring top plate arranged on the anchoring end is perpendicular to the central line of the prestressed duct, and a grouting hole and an exhaust hole are formed in the prestressed duct;
s3, pouring modified high-strength concrete, pouring concrete at the continuous positions of the bridge deck, the end cross beam and the pier top and on two sides of the middle fulcrum in the later stage after the side templates are installed, constructing by using a three-roller concrete paver at a material distribution speed of 30-40 m/h, and spraying water to wet the surface of the box girder before material distribution;
and S4, curing the concrete, and after the concrete pouring is finished, introducing steam with the temperature of 45-55 ℃ through a steam pipeline to perform curing for 6-12 hours, wherein the air pressure is controlled at 1.0-1.2 Mpa until the concrete curing at the continuous part of the bridge deck, the end beam and the pier top and the two sides of the middle pivot reaches the design standard.
Furthermore, the modified high-strength concrete is prepared from the following components in parts by weight: 35-45 parts of cement, 8-10 parts of fine sand, 20-25 parts of broken stone, 50-60 parts of water, 5.5-7.5 parts of modified asphalt, 8-10 parts of metakaolin, 3-5 parts of fly ash and 0.6-0.8 part of flatting agent.
Furthermore, the modified asphalt is prepared by fully mixing the following components in parts by weight: 60-80 parts of matrix asphalt, 10-15 parts of red mud, 5-7 parts of rubber powder, 2.5-5.5 parts of SBS modifier, 5-7 parts of slaked lime, 8-10 parts of white mud and 0.3-1.6 parts of silicate material.
Furthermore, one end of the prestressed duct is a grouting end, the grouting end is connected with a grouting pump, the other end of the prestressed duct is a grout sucking end, a waste grout container and a grout storage barrel are connected to the branch of the grout sucking end, and the grout storage barrel is further connected with a vacuum pump.
Further, vacuumizing the prestressed duct until the vacuum pressure reaches the range of-0.06 to-0.1 MPa, and then pressing the slurry into the prestressed duct through a grouting pump, wherein the grouting pressure is controlled to be 0.5 to 0.7 MPa.
Furthermore, a corrugated top plate is laid on the top of the steel box girder, and the grooves of the corrugated top plate are matched with the steel bars in a positioning mode.
Furthermore, the three roll shafts of the three-roll-shaft concrete paver are 3.5m in length, 219mm in diameter and 2cm higher than the track in cloth height.
Furthermore, each vertex of the corrugated pipe is provided with an exhaust hole, each low point of the corrugated pipe is provided with a drain hole, each vertex and two ends of the corrugated pipe are provided with inspection holes, and the exhaust hole and the drain hole are respectively and correspondingly connected with an exhaust pipe and a drain pipe.
Furthermore, the steam pipeline is connected with an electric heating steam generator, the electric heating steam generator comprises a water supply system, an automatic control system, a heating system and a safety protection system, and steam generated by the electric heating steam generator is input into the concrete of the bridge deck through the steam pipeline.
Furthermore, after the high-strength concrete is poured, the static placing time is 4-6 h, and the temperature of a static placing environment is not lower than 10 ℃; and after the high-strength concrete reaches the initial strength, introducing steam to heat and maintain the concrete, wherein the heating speed is not more than 8 ℃/h.
Compared with the prior art, the invention at least comprises the following beneficial technical effects:
1. the construction method of the invention adopts the modified high-strength concrete material with high elastic modulus and high tensile and compressive strength as the bridge deck structure layer, and realizes the purpose of no steam curing after the concrete pouring is finished by improving the component proportion of the concrete and doping the modified asphalt, and the use of the modified concrete can greatly reduce the thickness and the dead weight of the structure layer and improve the durability of the combined bridge deck. The invention rolls the wave-shaped top plate in the same way as the wave-shaped web plate and replaces the U-shaped rib welding of the top plate, thereby greatly reducing the number of welding seams, realizing the mechanized welding of all the welding seams, improving the manufacturing efficiency and controlling the welding quality. According to the invention, the original PBL shear connector is optimized, the shear connector with two free openings at two ends is used as a structure for arranging and limiting the reinforcing steel bars, the opening shape of the shear connector is beneficial to arranging the reinforcing steel bars, and the PBL shear connector has excellent mechanical and fatigue properties and can effectively prolong the service life of a bridge.
2. The construction method comprises the following specific steps: the method comprises the steps of laying a profiled steel sheet, installing reinforcing steel bars, an anchor backing plate and a prestressed pore channel, pouring modified high-strength concrete and maintaining the concrete, wherein the concrete pouring comprises bridge deck concrete, end beam fine stone concrete, pier top continuous parts and concrete on two sides of a middle fulcrum, the bridge deck concrete is poured twice, and steam maintenance is timely carried out after the concrete pouring is finished, so that the construction quality of the bridge deck is guaranteed. And (3) detecting the pre-camber at any time in the concrete pouring process, and timely taking measures to adjust if the pre-camber changes too much so as to ensure the construction quality of the steel box girder.
3. When the vacuum auxiliary grouting process is adopted for grouting the pore channels, all the prestressed pore channels are provided with exhaust holes at each peak, drain holes are arranged at each low point, inspection holes are arranged at each peak and two ends, when the vacuum pressure in the prestressed pore channels reaches and stabilizes within the range of-0.06 to-0.1 MPa, slurry is pressed into the prestressed pore channels at a low speed, and the grouting pressure is controlled within the range of 0.5 to 0.7MPa, so that the air tightness condition in the pore channels can be monitored in real time, and the tightness and the connection strength of the connection of the corrugated pipe and each pipeline can meet the requirements.
4. After the pouring construction of the modified high-strength concrete is finished, the geotextile is covered on the concrete, a proper amount of warm water is scattered for curing, a steam pipeline is arranged on the surface of the concrete, the curing temperature of the concrete is ensured to meet the requirement, the influence of high-temperature steam on a coating is effectively avoided, an integral shed frame is erected for heat preservation in the curing process of the concrete, the heat preservation tarpaulin is wrapped on the outer side of the concrete, the curing temperature and humidity are recorded during curing, the concrete and the elastic modulus strength on the third day, the fourth day and the fifth day are detected, the curing period is determined, and therefore the curing quality of the concrete is ensured.
Drawings
FIG. 1 is a schematic process flow diagram of the present invention.
Fig. 2 is a schematic structural view of the bridge deck of the present invention.
Fig. 3 is a schematic view of the arrangement of the open type profiled steel sheet of the present invention.
Fig. 4 is a concrete pouring schematic of the deck slab of the present invention.
FIG. 5 is a schematic view of the vacuum assisted grouting of the present invention.
Reference numbers in the figures: 1. a steel box girder; 2. a cantilever; 3. open-type profiled steel sheets; 4. concrete at the end beam supports; 5. a mud jacking pump; 6. an exhaust valve; 7. a pre-stressed duct; 8. a pulp storage barrel; 9. a vacuum pump; 10. a waste slurry container; 11. grouting end; 12. a pulp sucking end; 13. a bridge deck; 13-a, pouring concrete at the early stage of the bridge deck; 13-b, and concrete poured at the later stage of the bridge deck.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
Referring to fig. 1 and 2, the embodiment discloses a construction method of a modified high-strength concrete corrugated roof combined bridge deck, which includes the following process steps:
s1, laying profiled sheets, referring to FIG. 3, after the maintenance of the bridge deck 13, the inner linings of the webs on the two sides of the middle pivot and the concrete 4 at the supporting position of the end cross beam in the previous stage is finished, firstly laying the open profiled sheets 3 between the cantilever 2 and the box of the steel box girder 1, then installing the end plates of the open profiled sheets 3, laying the wave-shaped top plate at the beam top of the steel box girder 1, and positioning and matching the grooves of the wave-shaped top plate and the reinforcing steel bars.
S2, installing the steel bars, the anchor backing plate and the prestressed duct 7, and specifically comprising the following operation steps:
(1) firstly, popping side lines of a steel bar framework around the open profiled steel plate 3, controlling the spacing of steel bars by adopting a steel bar positioning jig, and then installing and binding the steel bars in the open profiled steel plate 3;
(2) in the process of installing the steel reinforcement framework piece, an anchor backing plate is installed according to a preset position, and the requirement of the installation position of the anchor backing plate is ensured;
(3) the prestressed duct 7 is a corrugated pipe, a pre-embedded anchor ring top plate arranged on the anchoring end is perpendicular to the central line of the prestressed duct 7, and the prestressed duct 7 is provided with a grouting hole and an exhaust hole;
and S3, pouring the modified high-strength concrete, and referring to FIG. 4, wherein the lengths of three roll shafts of the three-roll-shaft concrete paver are 3.5m, the diameters of the three roll shafts are 219mm, and the cloth height is 2cm higher than the track. After the side templates are installed, pouring concrete at the bridge deck 13, the end cross beam and the pier top continuous part and on two sides of the middle fulcrum in the later stage, constructing by using a three-roller concrete paver at the material distribution speed of 30-40 m/h, and spraying water to wet the surface of the box girder before material distribution;
and S4, curing the concrete, and after the concrete is poured, introducing steam with the temperature of 45-55 ℃ through a steam pipeline to perform curing for 6-12 hours, wherein the air pressure is controlled at 1.0-1.2 Mpa until the concrete curing at the continuous part of the bridge deck 13, the end cross beam and the pier top and the two sides of the middle fulcrum reaches the design standard. The steam pipeline is connected with an electric heating steam generator, the electric heating steam generator comprises a water supply system, an automatic control system, a heating system and a safety protection system, and steam generated by the electric heating steam generator is input into the concrete of the bridge deck 13 through the steam pipeline. After the high-strength concrete is poured, the standing time is 4-6 h, and the temperature of the standing environment is not lower than 10 ℃; and after the high-strength concrete reaches the initial strength, introducing steam to heat and maintain the concrete, wherein the heating speed is not more than 8 ℃/h.
In the embodiment, the modified high-strength concrete is prepared from the following components in parts by weight: 40 parts of cement, 9 parts of fine sand, 22 parts of broken stone, 55 parts of water, 6.5 parts of modified asphalt, 9 parts of metakaolin, 4 parts of fly ash and 0.7 part of flatting agent. The modified asphalt is prepared by fully mixing the following components in parts by weight: 70 parts of matrix asphalt, 12 parts of red mud, 6 parts of rubber powder, 4 parts of SBS modifier, 6 parts of slaked lime, 9 parts of white mud and 0.9 part of silicate material.
Referring to fig. 5, the one end of prestressed duct 7 is mud jacking end 11, and mud jacking end 11 is connected with mud jacking pump 5, and the other end of prestressed duct 7 is for inhaling thick liquid end 12, inhales thick liquid end 12 branch and is connected with useless thick liquid container 10, storage bucket 8, and storage bucket 8 still is connected with vacuum pump 9, and mud jacking end 11, inhale thick liquid end 12 and all be equipped with discharge valve 6. Vacuumizing the prestressed duct 7 until the vacuum pressure reaches the range of-0.06 to-0.1 Mpa, and then pressing the slurry into the prestressed duct 7 through a grouting pump 5, wherein the grouting pressure is controlled to be 0.5 to 0.7 Mpa.
Every summit position of bellows all is equipped with the exhaust hole, and every low point position all is equipped with the wash port, and every summit and both ends all are equipped with the inspection hole, and exhaust hole, wash port correspond respectively and are connected with blast pipe and drain pipe, and mud jacking pipe, blast pipe and drain pipe are the minimum internal diameter and are the plastic pipe of the standard pipe or the adaptation of 20 mm.
The working principle of the construction method of the modified high-strength concrete corrugated roof combined bridge deck 13 disclosed by the embodiment is as follows: the construction method comprises the steps of laying profiled steel plates, installing reinforcing steel bars, anchor backing plates and prestressed pore channels 7, pouring modified high-strength concrete and curing the concrete, wherein the concrete pouring comprises bridge deck 13 concrete, end beam fine stone concrete, pier top continuous parts and concrete on two sides of a middle fulcrum, the bridge deck 13 concrete is poured twice, and steam curing is timely performed after the concrete pouring is finished, so that the construction quality of the bridge deck 13 is guaranteed. And (3) detecting the pre-camber at any time in the concrete pouring process, and timely taking measures to adjust if the pre-camber changes too much so as to ensure the construction quality of the steel box girder 1.
In addition, the construction method adopts the modified high-strength concrete material with high elastic modulus and high tensile and compressive strength as the bridge deck structure layer, the steam curing-free purpose after the concrete pouring is finished is realized by improving the component proportion of the concrete and doping the modified asphalt, the thickness and the dead weight of the structure layer can be greatly reduced by using the modified concrete, and the durability of the combined bridge deck 13 is improved. The invention rolls the wave-shaped top plate in the same way as the wave-shaped web plate and replaces the U-shaped rib welding of the top plate, thereby greatly reducing the number of welding seams, realizing the mechanized welding of all the welding seams, improving the manufacturing efficiency and controlling the welding quality.
The embodiments of the present invention are preferred embodiments of the present invention, and the scope of the present invention is not limited by these embodiments, so: equivalent changes made according to the structure, shape and principle of the invention shall be covered by the protection scope of the invention.
Claims (10)
1. A construction method of a modified high-strength concrete corrugated roof combined bridge deck is characterized by comprising the following process steps:
s1, laying profiled sheets, after the previous bridge deck (13), the web linings on two sides of the middle fulcrum and the concrete (4) at the end beam supporting position are cured, respectively laying open profiled sheets (3) between a cantilever (2) and a box of a steel box beam (1), and then installing a plug board at the end part of each open profiled sheet (3);
s2, installing steel bars, anchor backing plates and prestressed ducts (7), and specifically comprising the following operation steps:
(1) firstly, popping side lines of a steel bar framework around the open profiled steel plate (3), controlling the spacing of steel bars by adopting a steel bar positioning jig, and then installing and binding the steel bars in the open profiled steel plate (3);
(2) in the process of installing the steel reinforcement framework piece, an anchor backing plate is installed according to a preset position, and the requirement of the installation position of the anchor backing plate is ensured;
(3) the prestressed duct (7) is a corrugated pipe, an embedded anchor ring top plate arranged on the anchoring end is perpendicular to the central line of the prestressed duct (7), and the prestressed duct (7) is provided with a grouting hole and an exhaust hole;
s3, pouring modified high-strength concrete, pouring concrete at the continuous positions of the bridge deck (13), the end cross beam and the pier top and on two sides of the middle fulcrum in the later stage after the side templates are installed, constructing by using a three-roller concrete paver at the material distribution speed of 30-40 m/h, and spraying water to wet the surface of the box girder before material distribution;
and S4, curing the concrete, and after the concrete pouring is finished, introducing steam with the temperature of 45-55 ℃ through a steam pipeline to perform curing for 6-12 hours, wherein the air pressure is controlled at 1.0-1.2 Mpa until the concrete curing at the continuous part of the bridge deck (13), the end beam, the pier top and the two sides of the middle fulcrum reaches the design standard.
2. The construction method of the modified high-strength concrete corrugated roof combined type bridge deck as claimed in claim 1, wherein: the modified high-strength concrete is prepared from the following components in parts by weight: 35-45 parts of cement, 8-10 parts of fine sand, 20-25 parts of broken stone, 50-60 parts of water, 5.5-7.5 parts of modified asphalt, 8-10 parts of metakaolin, 3-5 parts of fly ash and 0.6-0.8 part of flatting agent.
3. The construction method of the modified high-strength concrete corrugated roof combined type bridge deck as claimed in claim 1, wherein: the modified asphalt is prepared by fully mixing the following components in parts by weight: 60-80 parts of matrix asphalt, 10-15 parts of red mud, 5-7 parts of rubber powder, 2.5-5.5 parts of SBS modifier, 5-7 parts of slaked lime, 8-10 parts of white mud and 0.3-1.6 parts of silicate material.
4. The construction method of the modified high-strength concrete corrugated roof combined type bridge deck plate as claimed in claim 1, wherein: the one end of prestressing force pore canal (7) is mud jacking end (11), and mud jacking end (11) is connected with mud jacking pump (5), and the other end of prestressing force pore canal (7) is for inhaling thick liquid end (12), inhales thick liquid end (12) branch and is connected with useless thick liquid container (10), storage bucket (8), and storage bucket (8) still are connected with vacuum pump (9).
5. The construction method of the modified high-strength concrete corrugated roof combined bridge deck slab as claimed in claim 4, wherein: and vacuumizing the prestressed duct (7) until the vacuum pressure reaches the range of-0.06 to-0.1 Mpa, and then pressing the slurry into the prestressed duct (7) through a grouting pump (5), wherein the grouting pressure is controlled to be 0.5 to 0.7 Mpa.
6. The construction method of the modified high-strength concrete corrugated roof combined type bridge deck plate as claimed in claim 1, wherein: the corrugated top plate is laid on the top of the steel box girder (1), and the grooves of the corrugated top plate are matched with the steel bars in a positioning mode.
7. The construction method of the modified high-strength concrete corrugated roof combined type bridge deck plate as claimed in claim 1, wherein: the three roll shafts of the three-roll-shaft concrete paver are 3.5m in length, 219mm in diameter and 2cm higher than the track in cloth height.
8. The construction method of the modified high-strength concrete corrugated roof combined type bridge deck plate as claimed in claim 1, wherein: every summit position of bellows all is equipped with the exhaust hole, and every low point position all is equipped with the wash port, and every summit and both ends all are equipped with the inspection hole, and exhaust hole, wash port correspond respectively to be connected with blast pipe and drain pipe.
9. The construction method of the modified high-strength concrete corrugated roof combined bridge deck as claimed in claim 1, wherein the steam pipeline is connected with an electric heating steam generator, the electric heating steam generator comprises a water supply system, an automatic control system, a heating system and a safety protection system, and steam generated by the electric heating steam generator is input into the concrete of the bridge deck (13) through the steam pipeline.
10. The construction method of the modified high-strength concrete corrugated roof combined type bridge deck slab as claimed in any one of claims 1 to 9, wherein after the high-strength concrete is poured, the standing time is 4 to 6 hours, and the standing ambient temperature is not lower than 10 ℃; and after the high-strength concrete reaches the initial strength, introducing steam to heat and maintain the concrete, wherein the heating speed is not more than 8 ℃/h.
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