CN112267383A - Construction method of prefabricated bridge deck steel-concrete composite beam - Google Patents

Construction method of prefabricated bridge deck steel-concrete composite beam Download PDF

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Publication number
CN112267383A
CN112267383A CN202011095291.9A CN202011095291A CN112267383A CN 112267383 A CN112267383 A CN 112267383A CN 202011095291 A CN202011095291 A CN 202011095291A CN 112267383 A CN112267383 A CN 112267383A
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China
Prior art keywords
steel
box girder
steel box
construction
bridge deck
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CN202011095291.9A
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Chinese (zh)
Inventor
王保栋
王永宏
刘振
秦海明
杨波
孙飞国
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China Construction Eighth Engineering Division Co Ltd
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China Construction Eighth Engineering Division Co Ltd
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Priority to CN202011095291.9A priority Critical patent/CN112267383A/en
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    • 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
    • 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
    • E01D2/00Bridges characterised by the cross-section of their bearing spanning structure
    • E01D2/04Bridges characterised by the cross-section of their bearing spanning structure of the box-girder type
    • EFIXED CONSTRUCTIONS
    • E01CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01DCONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
    • E01D2101/00Material constitution of bridges
    • E01D2101/20Concrete, stone or stone-like material
    • E01D2101/24Concrete
    • E01D2101/26Concrete reinforced
    • EFIXED CONSTRUCTIONS
    • E01CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01DCONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
    • E01D2101/00Material constitution of bridges
    • E01D2101/30Metal

Abstract

The invention provides a construction method of a prefabricated bridge deck steel-concrete composite beam, which belongs to the technical field of bridge engineering construction, and comprises the steps of preparation before construction, steel box beam manufacturing and transportation, steel box beam installation, steel box beam bridge deck construction and the like, wherein the construction method of the prefabricated bridge deck steel-concrete composite beam is characterized in that a BIM technology is applied to simulate the construction process, and the BIM model accurately guides factory blanking, so that the reasonable arrangement of various working procedures such as processing, transportation and the like is effectively ensured, and the construction efficiency is improved; the steel box girder is manufactured in a sectional and sectional mode in a factory and is assembled on site, so that the quality difficulty is effectively controlled, the construction quality is improved, the operation is simple and the construction efficiency is high; when the bridge deck is processed, the quality of the bridge deck is effectively improved by adopting the modes of factory prefabrication and curing in-site curing rooms; in the installation process of the steel box girder and the bridge deck slab, the steel box girder shear nails and the reinforcing steel bars of the reserved grooves of the bridge deck slab are combined through concrete pouring, and the construction efficiency is effectively improved.

Description

Construction method of prefabricated bridge deck steel-concrete composite beam
Technical Field
The invention belongs to the technical field of bridge engineering construction, and particularly relates to a construction method of a prefabricated bridge deck steel-concrete composite beam.
Background
At present, steel-concrete combination beams are increasingly used in highway bridges, and particularly in the situations of crossing highways, railways and the like, the influence on existing lines can be reduced, and the steel-concrete combination beams can be flexibly suitable for various spans and terrains.
However, in the prior art, the steel box girder assembling construction site is relatively simple in equipment, complex in environment and high in quality and safety control risks; in the cast-in-place construction of the bridge deck, the support of the internal mold of the box girder is complex, the operation is difficult, and the quality of the steel-concrete composite beam is difficult to control; the influence of a large amount of operations on the construction site of the bridge site on the existing traffic is large.
Disclosure of Invention
The embodiment of the invention provides a construction method of a prefabricated bridge deck steel-concrete composite beam, aiming at solving the problems that the existing steel box beam assembling construction site is simple in equipment, complex in environment and high in quality and safety control risk; in the cast-in-place construction of the bridge deck, the support of the internal mold of the box girder is complex, the operation is difficult, and the quality of the steel-concrete composite beam is difficult to control; the problem that a large amount of operation on the bridge site construction site has great influence on the existing traffic and the like is solved.
In view of the above problems, the technical solution proposed by the present invention is:
the invention provides a construction method of a prefabricated bridge deck steel-concrete composite beam, which comprises the following steps:
s1, preparing before construction, reasonably applying BIM technology according to design requirements of drawings, simulating steel beam sectioning, segmentation, cell plate division, blanking, welding, assembling and coating, ensuring accurate blanking and reasonable process arrangement;
s2, manufacturing and transporting the steel box girder, reasonably segmenting according to transportation and construction environmental factors, pre-assembling and coating the surface of the steel box girder after the steel box girder is processed and manufactured in a factory, and transporting the steel box girder to an installation site after the steel box girder is coated;
s2a, dividing and manufacturing a plate unit, wherein each section of steel box girder consists of a T-shaped girder unit, a bottom plate unit and a diaphragm plate unit, main parts and special-shaped parts are blanked by a numerical control plasma cutting machine, a straight strip plate is blanked by a plasma multi-head cutting machine, pre-assembly is carried out after processing and manufacturing in a factory, and section decomposition and coating are carried out after the pre-assembly is finished;
s2b, transporting the steel box girder, towing a three-axis vehicle by adopting a high-power guide vehicle to carry, paving a thin plate at the bottom of the equipment, then firmly binding the front end of the equipment with a special tray by using a plurality of steel wire ropes and a chain block, and firmly binding the rear end of the equipment with the three-axis by using a plurality of steel wire ropes and a chain block;
s3, installing the steel box girder, cleaning and leveling a construction area, erecting a support in the area, installing the steel box girder according to site construction conditions after the erection is finished, and detecting the height of the structural section of the steel box girder by using a level gauge;
s3a, leveling and hardening the hoisting site before hoisting, performing lime-soil treatment on a softer ground, and paving graded broken stones on the ground surface for hardening treatment to ensure that a beam-transporting vehicle and a large-tonnage truck crane pass smoothly;
s3b, erecting a support, wherein a plurality of circular tube stand columns are adopted as stand columns of a single support, the height is calculated according to field measurement, a cross beam is arranged above the temporary support and the circular tube of the portal support, the cross beam of the temporary support adopts a section steel beam, a sand box is arranged on the cross beam and is used for bearing the dead weight and the construction load of the steel box beam, a concrete manufacturing temporary foundation is manufactured below the support, reinforcing steel bars are arranged in the foundation, and a pre-buried steel plate is arranged on the;
s3c, hoisting and mounting, wherein the total mounting of the steel box girder is completely hoisted and mounted by using a truck crane as main hoisting equipment according to the field working condition, the sectional weight of the steel box girder and the mounting height;
s3d, connecting the steel box girder sections, after the steel box girder structural sections are hoisted, detecting the height of the steel box girder structural sections by using a level meter at any time when the elevation of the steel box girder is adjusted until the height reaches a designed height, and monitoring the position coordinates of the girder sections by using a total station during the girder falling process of each steel box structural section;
s4, constructing the steel box girder bridge deck, and installing the bridge deck on the construction site according to the actual situation of the construction site;
s4a, manufacturing a bridge deck, prefabricating the on-site bridge deck according to actual conditions, hoisting after storing for 2 months, and dividing plates according to the principle of facilitating hoisting and installation;
and S4b, installing the bridge deck, transporting the bridge deck to a bridge position by adopting a flat transport vehicle, hoisting the truck crane in place, pouring the reserved groove and the longitudinal and transverse joint concrete after the overhanging steel bars are welded, and finally removing the template.
As a preferable technical scheme of the invention, the range of the height of the top of the sand box in the step S3b, which exceeds the design height of the construction drawing, is 1-2 cm.
As a preferred technical solution of the present invention, in the step S3c, a reverse hoisting sequence is adopted, which is a sequence of a far-side box girder segment → a middle box girder segment → a near-side box girder segment.
Compared with the prior art, the invention has the beneficial effects that:
(1) the BIM technology is applied to simulate the construction process, the blanking of a factory is accurately guided through the BIM model, the reasonable arrangement of various working procedures such as processing, transportation and the like is effectively guaranteed, and the construction efficiency is improved.
(2) The steel box girder is manufactured in a segmented and sectional mode in a factory and assembled on site, so that the quality difficulty is effectively controlled, the construction quality is improved, the operation is simple and the construction efficiency is high.
(3) When the bridge deck slab is processed, the mode of factory prefabrication and curing in-site curing room maintenance is adopted, and the quality of the bridge deck slab is effectively improved.
(4) In the installation process of the steel box girder and the bridge deck slab, the steel box girder shear nails and the reinforcing steel bars of the reserved grooves of the bridge deck slab are combined through concrete pouring, and the construction efficiency is effectively improved.
The foregoing description is only an overview of the technical solutions of the present invention, and the embodiments of the present invention are described below in order to make the technical means of the present invention more clearly understood and to make the above and other objects, features, and advantages of the present invention more clearly understandable.
Drawings
Fig. 1 is a flow chart of a construction method of a prefabricated bridge deck steel-concrete composite beam disclosed by the invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings of the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the equipment or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
Examples
Referring to the attached figure 1, the invention provides a technical scheme: the construction method of the prefabricated bridge deck steel-concrete composite beam comprises the following steps:
s1, preparing before construction, reasonably applying BIM technology according to design requirements of drawings, simulating steel beam sectioning, segmentation, cell plate division, blanking, welding, assembling and coating, ensuring accurate blanking and reasonable process arrangement;
s2, manufacturing and transporting the steel box girder, reasonably segmenting according to transportation and construction environmental factors, pre-assembling and coating the surface of the steel box girder after the steel box girder is processed and manufactured in a factory, and transporting the steel box girder to an installation site after the steel box girder is coated;
s2a, dividing and manufacturing a plate unit, wherein each section of steel box girder consists of a T-shaped girder unit, a bottom plate unit and a diaphragm plate unit, main parts and special-shaped parts are blanked by a numerical control plasma cutting machine, a straight strip plate is blanked by a plasma multi-head cutting machine, pre-assembly is carried out after processing and manufacturing in a factory, and section decomposition and coating are carried out after the pre-assembly is finished;
specifically, according to the transportation and construction environment, considering factors of all aspects, reasonably segmenting the steel box girder, wherein each segment of the steel box girder consists of a T-shaped girder unit, a bottom plate unit and a diaphragm plate unit, pre-assembling the steel box girder after processing and manufacturing in a factory, decomposing and coating the segments after pre-assembling, transporting the steel box girder to an installation site after coating, and hoisting the steel box girder by using a truck crane; and, when the preparation, the part not only deflection is little, and production efficiency is high moreover, should carry out the machine tooling to the edge or the welding edge of important part to guarantee the size and the welding groove precision of part, reserve the machining allowance during the unloading.
S2b, transporting the steel box girder, towing a three-axis vehicle by adopting a high-power guide vehicle to carry, paving a thin plate at the bottom of the equipment, then firmly binding the front end of the equipment with a special tray by using a plurality of steel wire ropes and a chain block, and firmly binding the rear end of the equipment with the three-axis by using a plurality of steel wire ropes and a chain block;
particularly, during transportation, the transportation route of selection will be fit for passing of car and train, and the road surface is flat, does not have too big slope, and car and train can be guaranteed to pass through smoothly by road curve minimum radius, and equipment and sweep are binded as an organic wholely, guarantee that goods are changeed with the car when turning in the transportation, and equipment stability is good, and factor of safety is big when traveling.
S3, installing the steel box girder, cleaning and leveling a construction area, erecting a support in the area, installing the steel box girder according to site construction conditions after the erection is finished, and detecting the height of the structural section of the steel box girder by using a level gauge;
s3a, leveling and hardening the hoisting site before hoisting, performing lime-soil treatment on a softer ground, and paving graded broken stones on the ground surface for hardening treatment to ensure that a beam-transporting vehicle and a large-tonnage truck crane pass smoothly;
s3b, erecting a support, wherein a plurality of circular tube stand columns are adopted as stand columns of a single support, the height is calculated according to field measurement, a cross beam is arranged above the temporary support and the circular tube of the portal support, the cross beam of the temporary support adopts a section steel beam, a sand box is arranged on the cross beam and is used for bearing the dead weight and the construction load of the steel box beam, a concrete manufacturing temporary foundation is manufactured below the support, reinforcing steel bars are arranged in the foundation, and a pre-buried steel plate is arranged on the;
s3c, hoisting and mounting, wherein the total mounting of the steel box girder is completely hoisted and mounted by using a truck crane as main hoisting equipment according to the field working condition, the sectional weight of the steel box girder and the mounting height;
s3d, connecting the steel box girder sections, after the steel box girder structural sections are hoisted, detecting the height of the steel box girder structural sections by using a level meter at any time when the elevation of the steel box girder is adjusted until the height reaches a designed height, and monitoring the position coordinates of the girder sections by using a total station during the girder falling process of each steel box structural section;
it should be noted that the allowable deviation of the steel box girder segments in the hoisting position is as follows:
item Tolerance deviation
Longitudinal bridge with offset to central line (mm) ≤10
Vertical rib straightness f (mm) ≤20
Misalignment amount (mm) of butt joint of side plates ≤10
Other parts butt joint misalignment (mm) ≤15
Inner and outer side plate butt joint gap (mm) 0~4
Particularly, the hoist and mount of steel box girder finish and linear adjustment put in place through the inspection qualified back, utilize the pin bolt hole crowd that excels in of temporary positioning, with the temporary fixed steel box girder of several pin on web, the bottom plate respectively, the construction of the back high strength bolt of steel box girder location, its construction sequence is: the butt-joint bolting direction of the bottom plate is from the middle to two sides; the webs are in butt joint and bolted connection, and the bolting direction is from bottom to top; the wing plate plates are in butt joint and bolted connection; after all the steel beams are positioned, the transverse connection system is installed.
Furthermore, when the high-strength bolt is screwed, the design pretension force and the construction pretension force of the high-strength bolt meet the requirements of design and specification; the tightening method of the high-strength bolt connecting pair is a torque method, and comprises a first tightening part and a final tightening part, wherein a fixed-torque wrench is used for the first tightening and the final tightening, the final tightening torque value is determined by test data, the first tightening torque is preferably 50% of the final tightening torque, the high-strength bolts after the first tightening are checked one by a striking method, white paint is used for marking on the bolts, the nuts, the gaskets and the components after the first tightening is qualified, so that whether the bolts are loosened in a leakage mode or not and whether the gaskets or the bolts rotate along with the nuts or not are checked after the final tightening, the final tightening check is completed within 4-24 hours after the bolts are finally tightened, the checking method is a tightening check method, the bolts are tightened again by using a calibrated pointer wrench or a digital display wrench, the torque value when the nuts rotate just now is read, and the deviation is not more than 10% of the check torque value.
S4, constructing the steel box girder bridge deck, and installing the bridge deck on the construction site according to the actual situation of the construction site;
s4a, manufacturing a bridge deck, prefabricating the on-site bridge deck according to actual conditions, hoisting after storing for 2 months, and dividing plates according to the principle of facilitating hoisting and installation;
specifically, the main construction processes for manufacturing the bridge deck are as follows: prefabrication field → steel bar processing → bottom die brush release agent → steel bar installation → steel side die installation → concrete pouring → maintenance and form removal → hoisting and stacking.
The prefabricated field is provided with pedestals, gantry cranes, transportation channels and the like on the field, and is reasonably arranged and constructed according to local conditions.
And (4) processing the reinforcing steel bars, wherein the entering, processing and installation of the reinforcing steel bars of the bridge deck are required to meet the standard requirements.
The steel bar is installed, and the allowable deviation of the steel bar installation is as follows:
Figure BDA0002723520470000081
Figure BDA0002723520470000091
the steel side die installation and the allowable deviation of the steel side die installation are as follows:
examination item Tolerance deviation
Elevation of template (mm) ±10
Inner dimension of template (mm) ±20
Axis deviation (mm) 10
Height difference (mm) between two adjacent plates of template 2
The template surface is level (mm) 5
Pouring concrete: the concrete is mixed in a concrete mixing station, the concrete is transported to a construction site by a concrete transport vehicle, the concrete is vibrated in time after being placed in a mold, a surface vibrator and an inserted vibrating bar are adopted for vibrating, the surface is roughened after the concrete is poured, the geotextile is sprayed in time for covering and curing to prevent shrinkage cracks, steam curing can also be adopted, and enough test blocks are prepared in the pouring process to check the quality of the concrete.
And (3) maintaining and removing the formwork, wherein the maintaining time is not less than 7 days, the watering frequency is preferably enough to keep the surface of the concrete in a wet state every day, and enough test blocks are prepared in the pouring process of the prefabricated bridge deck slab so as to test the quality of the concrete.
It should be noted that the quality inspection standards of the prefabricated bridge deck are as follows:
examination item Tolerance deviation
Concrete strength (Mpa) Determined according to design requirements
Section size (mm) ±10
Length (mm) 5,-10
The bridge deck slab is lifted and stacked, a temporary stacking place is leveled and tamped, stacking supporting points are arranged for temporary stacking of the prefabricated bridge deck slab, the number of stacking layers is generally not more than 3, sleepers are used as temporary supports between every two layers, and the bridge deck slab is stored according to a certain sequence, so that the bridge deck slab is lifted conveniently during installation.
And S4b, installing the bridge deck, transporting the bridge deck to a bridge position by adopting a flat transport vehicle, hoisting the truck crane in place, pouring the reserved groove and the longitudinal and transverse joint concrete after the overhanging steel bars are welded, and finally removing the template.
In the embodiment of the invention, the range of the height of the top of the sand box exceeding the design height of the construction drawing in the step S3b is 1-2 cm; the sand box is pre-pressed to obtain the compression amount, so that the required height and the required pre-camber of the box girder can be adjusted according to the design requirements of drawings in the installation process.
In an embodiment of the present invention, the step S3c employs a reverse hoisting sequence, which is a distal box girder segment → a middle box girder segment → a proximal box girder segment.
According to the construction method of the prefabricated bridge deck steel-concrete composite beam, the BIM technology is applied to simulate the construction process, the BIM model accurately guides the factory blanking, the reasonable arrangement of various working procedures such as processing and transportation is effectively guaranteed, and the construction efficiency is improved; the steel box girder is manufactured in a sectional and sectional mode in a factory and is assembled on site, so that the quality difficulty is effectively controlled, the construction quality is improved, the operation is simple and the construction efficiency is high; when the bridge deck is processed, the quality of the bridge deck is effectively improved by adopting the modes of factory prefabrication and curing in-site curing rooms; in the installation process of the steel box girder and the bridge deck slab, the steel box girder shear nails and the reinforcing steel bars of the reserved grooves of the bridge deck slab are combined through concrete pouring, and the construction efficiency is effectively improved.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (3)

1. The construction method of the prefabricated bridge deck steel-concrete composite beam is characterized by comprising the following steps of:
s1, preparing before construction, reasonably applying BIM technology according to design requirements of drawings, simulating steel beam sectioning, segmentation, cell plate division, blanking, welding, assembling and coating, ensuring accurate blanking and reasonable process arrangement;
s2, manufacturing and transporting the steel box girder, reasonably segmenting according to transportation and construction environmental factors, pre-assembling and coating the surface of the steel box girder after the steel box girder is processed and manufactured in a factory, and transporting the steel box girder to an installation site after the steel box girder is coated;
s2a, dividing and manufacturing a plate unit, wherein each section of steel box girder consists of a T-shaped girder unit, a bottom plate unit and a diaphragm plate unit, main parts and special-shaped parts are blanked by a numerical control plasma cutting machine, a straight strip plate is blanked by a plasma multi-head cutting machine, pre-assembly is carried out after processing and manufacturing in a factory, and section decomposition and coating are carried out after the pre-assembly is finished;
s2b, transporting the steel box girder, towing a three-axis vehicle by adopting a high-power guide vehicle to carry, paving a thin plate at the bottom of the equipment, then firmly binding the front end of the equipment with a special tray by using a plurality of steel wire ropes and a chain block, and firmly binding the rear end of the equipment with the three-axis by using a plurality of steel wire ropes and a chain block;
s3, installing the steel box girder, cleaning and leveling a construction area, erecting a support in the area, installing the steel box girder according to site construction conditions after the erection is finished, and detecting the height of the structural section of the steel box girder by using a level gauge;
s3a, leveling and hardening the hoisting site before hoisting, performing lime-soil treatment on a softer ground, and paving graded broken stones on the ground surface for hardening treatment to ensure that a beam-transporting vehicle and a large-tonnage truck crane pass smoothly;
s3b, erecting a support, wherein a plurality of circular tube stand columns are adopted as stand columns of a single support, the height is calculated according to field measurement, a cross beam is arranged above the temporary support and the circular tube of the portal support, the cross beam of the temporary support adopts a section steel beam, a sand box is arranged on the cross beam and is used for bearing the dead weight and the construction load of the steel box beam, a concrete manufacturing temporary foundation is manufactured below the support, reinforcing steel bars are arranged in the foundation, and a pre-buried steel plate is arranged on the;
s3c, hoisting and mounting, wherein the total mounting of the steel box girder is completely hoisted and mounted by using a truck crane as main hoisting equipment according to the field working condition, the sectional weight of the steel box girder and the mounting height;
s3d, connecting the steel box girder sections, after the steel box girder structural sections are hoisted, detecting the height of the steel box girder structural sections by using a level meter at any time when the elevation of the steel box girder is adjusted until the height reaches a designed height, and monitoring the position coordinates of the girder sections by using a total station during the girder falling process of each steel box structural section;
s4, constructing the steel box girder bridge deck, and installing the bridge deck on the construction site according to the actual situation of the construction site;
s4a, manufacturing a bridge deck, prefabricating the on-site bridge deck according to actual conditions, hoisting after storing for 2 months, and dividing plates according to the principle of facilitating hoisting and installation;
and S4b, installing the bridge deck, transporting the bridge deck to a bridge position by adopting a flat transport vehicle, hoisting the truck crane in place, pouring the reserved groove and the longitudinal and transverse joint concrete after the overhanging steel bars are welded, and finally removing the template.
2. The construction method of the precast bridge deck steel-concrete composite beam as recited in claim 1, wherein the range of the height of the top of the sand box exceeding the design height of the construction drawing in the step S3b is 1-2 cm.
3. The construction method of the precast bridge deck steel-concrete composite beam according to claim 1, wherein a reverse hoisting sequence is adopted in the step S3c, and the sequence is a far-side box girder segment → a middle box girder segment → a near-side box girder segment.
CN202011095291.9A 2020-10-14 2020-10-14 Construction method of prefabricated bridge deck steel-concrete composite beam Pending CN112267383A (en)

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CN114086467A (en) * 2021-11-24 2022-02-25 中铁四局集团第五工程有限公司 Prefabricated installation construction method for steel-concrete composite beam bridge deck

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Application publication date: 20210126