CN110983987B - Construction method of steel-concrete combined beam - Google Patents
Construction method of steel-concrete combined beam Download PDFInfo
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- CN110983987B CN110983987B CN201911347557.1A CN201911347557A CN110983987B CN 110983987 B CN110983987 B CN 110983987B CN 201911347557 A CN201911347557 A CN 201911347557A CN 110983987 B CN110983987 B CN 110983987B
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- 238000010276 construction Methods 0.000 title claims abstract description 70
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 189
- 239000010959 steel Substances 0.000 claims abstract description 189
- 238000012937 correction Methods 0.000 claims abstract description 11
- 238000005096 rolling process Methods 0.000 claims description 42
- 238000005192 partition Methods 0.000 claims description 32
- 239000002131 composite material Substances 0.000 claims description 18
- 239000000463 material Substances 0.000 claims description 11
- 238000003825 pressing Methods 0.000 claims description 10
- 239000000725 suspension Substances 0.000 claims description 10
- 238000003466 welding Methods 0.000 claims description 9
- 239000011087 paperboard Substances 0.000 claims description 5
- 241000274582 Pycnanthus angolensis Species 0.000 claims description 4
- 238000002360 preparation method Methods 0.000 claims description 4
- 238000013461 design Methods 0.000 claims description 3
- 238000010521 absorption reaction Methods 0.000 claims description 2
- 230000009471 action Effects 0.000 claims description 2
- 230000035939 shock Effects 0.000 claims description 2
- 238000009415 formwork Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000007790 scraping Methods 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000007596 consolidation process Methods 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
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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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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D2/00—Bridges characterised by the cross-section of their bearing spanning structure
- E01D2/04—Bridges characterised by the cross-section of their bearing spanning structure of the box-girder type
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Abstract
The invention relates to a steel-concrete combined beam and a construction method, wherein the plane position of a bottom plate of a steel box is controlled by a position correction support body, a step support body and a jig support plate, and the position of a side plate of the steel box is controlled by a support column side lever and a support column adjusting bolt; the upper surface and the lower part of the lifted box girder are respectively provided with a beam top support plate and an overhanging support beam, and the beam top support plate is provided with four bridge girder erection machines; a hanging sliding beam is arranged on the outer side of the hung box girder, and a construction hanging basket capable of moving transversely along a hanging plate sliding groove on the hanging sliding beam is arranged on the lower portion of the hanging sliding beam; arranging a beam supporting column on the beam bottom concrete, and arranging a top supporting beam on the top end of the beam supporting column; the lower part of the steel box side die is provided with a support system combined by a combined support plate and a support plate top stay bar; a vibratory screed apparatus is provided which is movable along the support deck plate on the roof bracing beam. The invention can reduce the difficulty of hoisting the steel box girder and erecting the template, improve the concrete pouring construction quality and improve the construction efficiency.
Description
Technical Field
The invention relates to a steel-concrete combined beam and a construction method, which can reduce the difficulty in hoisting a steel box beam and erecting a template, improve the concrete pouring construction quality and improve the construction efficiency, belong to the field of bridge engineering and are suitable for the installation engineering of a steel tube concrete box beam bridge.
Background
The steel-concrete composite bridge has the characteristics of light weight, high strength, energy conservation, environmental protection, excellent earthquake resistance and whole life cycle and the like, and is a type of bridge suitable for various landforms and social environments. However, in the construction of the steel-concrete composite beam, the steel box processing and hoisting technology and the site concrete pouring construction are often difficult points of site control.
In the prior art, a novel steel-concrete composite beam system and a construction method thereof exist, and the construction method comprises the following steps: installing a bridge deck crane; mounting a steel beam for temporary consolidation, and setting a measurement control point; installing a segment main longitudinal beam; assembling the cross beam and the small longitudinal beam; symmetrically installing main longitudinal beams to finish final bolt screwing; pouring wet joints; and (5) performing second tensioning, and symmetrically installing according to the procedure of pouring the wet joints of the two segments at one time. The technology solves the problem of symmetrical installation of the steel-concrete combined beam cantilever at any moment, but is difficult to solve the problems of accurate preparation of a steel box, improvement of concrete pouring quality, improvement of formwork erecting quality and the like.
In view of this, in order to improve the on-site construction quality and efficiency of the steel-concrete composite beam, the invention of the steel-concrete composite beam and the construction method which can reduce the difficulties of steel box beam hoisting and formwork erecting, improve the concrete pouring construction quality and improve the construction efficiency is urgently needed.
Disclosure of Invention
The invention aims to provide a steel-concrete composite beam and a construction method, which can reduce the construction hoisting and formwork supporting difficulty, improve the construction efficiency and improve the construction quality and the structural durability.
In order to solve the technical problems, the invention is realized by the following technical scheme:
a construction method of a steel-concrete composite beam comprises the following construction steps:
1. construction preparation:
preparing a steel box bottom plate, steel box side plates, steel box vertical plates, vertical partition plates and transverse partition plates which meet the design size requirement; preparing materials and equipment required by construction;
2. assembling the steel box girder:
the method comprises the following steps that a jig frame first supporting column, a jig frame second supporting column and a position correction supporting body are sequentially arranged on a jig frame bottom plate, a jig frame supporting plate is arranged on the position correction supporting body, and a jig frame top beam is arranged at the top end of the jig frame first supporting column which is opposite to a mirror image; a box board position-correcting bolt is arranged on the first support column of the jig frame and the top beam of the jig frame; after the position of the jig frame supporting plate is corrected through the position correcting supporting body, a step supporting body is arranged between the jig frame supporting plate and the jig frame bottom plate; firstly, placing a steel box bottom plate on a jig frame supporting plate, and then connecting a steel box side plate with a second supporting column of the jig frame and a connecting pressing plate at the end part of a supporting column side lever; a transverse partition plate and a vertical partition plate are arranged in a space formed by enclosing a steel box bottom plate and steel box side plates, the vertical position of a steel box vertical plate is controlled through a box plate position-correcting bolt on a first support column of a jig frame, and the positions of the steel box vertical plate and the vertical partition plate are limited through a box plate position-correcting bolt on a top beam of the jig frame and a position-controlling transverse plate; welding the vertical partition plates with the steel box bottom plate and the steel box side plates, and vertically welding the transverse partition plates with the vertical partition plates;
3. hoisting a first section of steel box girder:
arranging a beam bottom support on the bridge pier, hoisting a first section of steel box girder which is welded into a whole by a steel box bottom plate, a steel box side plate and a steel box vertical plate onto the beam bottom support by adopting external hoisting equipment, and taking the first section of steel box girder as a hoisted box girder during the construction of a rear-hung steel box girder;
4. hoisting construction of a rear-hanging steel box girder:
laying a beam top supporting plate on the upper part of the hung box beam, arranging support beam hanging rods on the lower surfaces of the steel box side plate and the steel box bottom plate, and arranging a cantilever support beam at the other end of each support beam hanging rod; a supporting beam connecting rib is arranged between the adjacent cantilever supporting beams; the cantilever support beam at the lower part of the steel box bottom plate is provided with a vertical aligning body, the cantilever support beam at the lower part of the steel box side plate is provided with a support beam side lever, and the support beam side lever is provided with a lateral aligning rod and an aligning pressure plate facing the steel box side plate; laying two sets of bridging tracks on the beam top supporting plate, wherein each set of bridging track comprises two tracks; two bridging machines are symmetrically arranged on each set of bridging track; a hanging beam connecting plate is arranged on the outer side of the bridging track, and the hanging beam connecting plate is connected with the hanging sliding beam through a hanging beam hanging rod; the rear-hanging steel box girder is hung on a vertical positioning body by a steel box sling of the bridge girder erection machine, the vertical height of the rear-hanging steel box girder is controlled by the vertical positioning body, and the transverse position of the rear-hanging steel box girder is controlled by a lateral positioning rod;
5. and (3) beam top concrete pouring construction:
a support plate bottom stay bar is arranged on the side surface of the pier, and a rod end rotating hinge is arranged at the joint of the support plate bottom stay bar and the pier; firstly, beam bottom concrete pouring construction is carried out; after the beam bottom concrete forms strength, arranging full supporting rods and beam supporting pillars on the beam bottom concrete, arranging column bottom supporting plates at the joint of the beam supporting pillars and the beam bottom concrete, and arranging top supporting beams at the top ends of the beam supporting pillars; the outer side wall of the steel box side plate is provided with a support plate connecting plate and a combined support plate; a support plate hanging rod is arranged between the combined support plate and the top support beam, a plate bottom limiting tenon is arranged at the joint of the lower surface and the support plate bottom supporting rod, and a support plate top supporting rod is arranged between the upper surface and the steel box side plate; hanging the top plate bottom die and the top plate side die on the full supporting rod, and arranging a side die closing plate on the outer side of the top plate side die; a supporting platform plate is arranged on the top supporting beam, and a vibrating and leveling device is arranged on the supporting platform plate; when the beam top concrete is poured and constructed, the vibrating and strickling device is adopted to synchronously vibrate and strickling the beam top concrete.
Optionally, in the step 2), a strut adjusting bolt is arranged on a second strut of the jig frame, a rotary spherical hinge is arranged at the top end of the second strut of the jig frame, a rod bottom strut is arranged on the side surface of the second strut of the jig frame and is connected with a strut side rod through the rotary spherical hinge; the box plate position-correcting bolt consists of a bolt and a screw rod, and the fastening directions of the screw rods on the two sides of the bolt are opposite; the step supporting body is formed by welding steel plates, and the cross section of the step supporting body is in a step shape; a reinforced rib plate is arranged on the steel box bottom plate; the side rods of the support columns are formed by rolling steel pipes, and rod bottom limiting tenons are arranged at the joints of the lower surfaces of the side rods of the support columns and the rod bottom support rods; the rod bottom support rod consists of a bolt and screws, the fastening directions of the screws on the two sides of the bolt are opposite, and the bolt is connected with the second support column of the jig frame in a welding manner; the position correction support body adopts a hydraulic jack; and the two ends of the position control transverse plate are provided with connecting groove plates connected with the vertical partition plate or the steel box vertical plate.
Optionally, the lateral position correcting rod in the step 4) is welded with the side rod of the supporting beam and is connected with the position correcting pressure plate through a pressure plate rotating hinge; the position correcting pressure plate is made of a steel plate and is attached to and connected with the outer surface of the rear hanging steel box girder; the hanging sliding beam is formed by rolling a steel plate, a hanging plate sliding groove is formed in the hanging sliding beam, and a sliding hanging plate and a hanging plate roller wheel are arranged in the hanging plate sliding groove; the sliding hanging plate can transversely move along a hanging plate sliding groove on the hanging sliding beam under the action of external traction equipment, and a hanging rod is arranged on the lower surface of the sliding hanging plate; the hanging rods are formed by rolling steel pipes, construction hanging baskets are arranged at the lower ends of the hanging rods, and the connected hanging rods are connected through hanging rod studs; the construction hanging basket is formed by rolling steel, the cross section of the construction hanging basket is U-shaped, and the construction hanging basket is arranged between two parallel hanging sliding beams.
Optionally, the top end of the supporting plate jacking rod in the step 5) is sequentially provided with a rod end rotating hinge and a supporting rod jacking plate; the beam bottom support adopts a rubber damping support; the cross section of the side mold closing plate is L-shaped, and a closing plate position-correcting bolt is arranged between the side mold closing plate and the side stay bar of the template; the side stay bar of the template is rolled into an L shape by adopting a screw; the sealing plate position correcting bolt comprises a screw rod and a bolt, and the length of the sealing plate position correcting bolt is adjustable; the vibrating and strickling device can synchronously carry out vibrating and strickling construction of beam top concrete, and comprises two sliding transverse plates, connecting vertical plates are respectively arranged on the upper surfaces of the two sliding transverse plates, a flexible connecting plate is arranged between the two sliding transverse plates, and the connecting vertical plates are connected with external rolling and pulling equipment through position control inhaul cables; a row of movable rollers are respectively arranged between the lower surfaces of the two sliding transverse plates and the supporting platform plate; a first sliding vertical plate and a second sliding vertical plate are respectively arranged on the lower surfaces of the two sliding transverse plates along the moving direction of the sliding transverse plates; a vibration bottom plate and a strickling bottom plate are respectively arranged at the bottom ends of the first sliding vertical plate and the second sliding vertical plate, a surplus material collecting tank is arranged on the upper surface of the strickling bottom plate, a surface vibrator is arranged on the upper surface of the vibration bottom plate, and a plate bottom joint layer is arranged on the lower surface of the vibration bottom plate; the cross section of the strickle bottom plate is in a right trapezoid shape, the bottom surface of the trapezoid is connected with the upper surface of the beam top concrete, and the width of the bottom surface is larger than that of the top surface.
The embodiment of the invention has the following beneficial effects:
1. according to the embodiment of the invention, the position correction support body, the step support body and the jig support plate control the plane position of the steel box bottom plate, so that the difficulty in position limitation of the steel box bottom plate is reduced; meanwhile, the position of the side plate of the steel box is controlled by the side rod of the support column and the adjusting bolt of the support column, and the vertical position of the vertical partition plate is limited by the position control transverse plate, so that the positioning accuracy of the side plate of the steel box and the vertical partition plate is improved.
2. According to the embodiment of the invention, the beam top supporting plate and the cantilever supporting beam are respectively arranged on the upper surface and the lower part of the lifted box girder, so that the lifted box girder can be used as a bearing structure body for lifting construction of the lifted box girder, and the difficulty in arranging a supporting system is reduced.
3. According to the embodiment of the invention, the four bridge girder erection machines are arranged on the beam top supporting plate, so that the hoisting construction of the rear-hanging steel box girder can be synchronously carried out, the stress of a hoisting structure can be improved, and the hoisting construction efficiency can be improved; meanwhile, the hanging beam is arranged on the outer side of the hung box beam, and the construction hanging basket capable of moving transversely along the hanging plate sliding groove on the hanging sliding beam is arranged on the lower portion of the hanging beam.
4. One embodiment of the invention is that a beam supporting pillar is arranged on beam bottom concrete, and a top supporting beam is arranged at the top end of the beam supporting pillar; the position of the combined support plate is synchronously limited by the support plate hanging rod and the support plate bottom support rod outside the bridge pier; the lower part of the steel box side die is provided with a support system combined by a combined support plate and a support plate top support rod, and the upper surface of the beam bottom concrete is provided with a full supporting rod in a supporting way, so that the supporting quality of a top plate bottom die is improved; the vibrating and strickling device can move along the supporting platform plate on the top plate supporting beam, thereby reducing the difficulty of concrete surface vibration and strickling construction.
Of course, it is not necessary for any product in which the invention is practiced to achieve all of the above-described advantages at the same time.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a flow chart of a steel-concrete composite beam construction according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a steel box girder assembling construction structure according to an embodiment of the present invention;
FIG. 3 is a schematic structural view of the first section of steel box girder after being hoisted and placed according to one embodiment of the invention;
fig. 4 is a schematic view of a layout structure of the cantilever beam and the beam top support according to an embodiment of the present invention;
FIG. 5 is a schematic view of a bridge girder erection machine and a suspension sliding beam layout structure according to an embodiment of the present invention;
FIG. 6 is a schematic view of a connection structure of a suspension sliding beam and a construction hanging basket according to an embodiment of the present invention;
FIG. 7 is a schematic diagram of a construction structure for hoisting a rear-hung steel box girder according to an embodiment of the invention;
FIG. 8 is a schematic structural view of a beam-top concrete formwork according to an embodiment of the present invention;
FIG. 9 is a schematic view of the construction of vibrating and scraping concrete on the top of a beam according to an embodiment of the present invention;
in the drawings, the components represented by the respective reference numerals are listed below:
1-a steel box bottom plate; 2-steel box side plates; 3-a steel box vertical plate; 4-erecting a partition board; 5-diaphragm plate; 6-bed jig bottom plate; 7-a first support column of the jig frame; 8-a second support column of the jig frame; 9-aligning the support body; 10-a jig support plate; 11-a bed frame top beam; 12-box board position correcting bolt; 13-a step support; 14-side pole of brace; 15-connecting the pressing plate; 16-position control transverse plates; 17-bridge pier; 18-beam bottom support; 19-the box girder has been hung; 20-beam top support plate; 21-beam supporting hanging rods; 22-cantilever supporting beam; 23-brace beam connecting ribs; 24-a vertical retainer; 25-side lever of supporting beam; 26-lateral aligning rods; 27-aligning the pressure plate; 28-bridging the rail; 29-a bridge girder erection machine; 30-hanging beam connecting plates; 31-a suspended skid beam; 32-hanging beam hanger rods; 33-steel box slings; 34-a support plate bottom brace rod; 35-a rod end rotating hinge; 36-beam bottom concrete; 37-full supporting rod; 38-beam brace strut; 39-column bottom bracing plates; 40-top bracing beam; 41-support plate connecting plate; 42-a composite support plate; 43-a support plate hanging rod; 44-limiting falcon at the bottom of the plate; 45-support plate top brace rod; 46-top plate and bottom plate; 47-roof side form; 48-side form closures; 49-supporting the platform plate; 50-a vibrating and scraping device; 51-beam-top concrete; 52-strut adjusting bolt; 53-rotating spherical hinge; 54-a pole bottom brace; 55-position control inhaul cable; 56-a ribbed plate; 57-limit falcon at the bottom of the rod; 58-pressing plate rotating hinge; 59-rear hanging the steel box girder; 60-hanging board sliding chutes; 61-a slipping hanging plate; 62-hanging plate rollers; 63-hanging the hanging rod; 64-construction hanging basket; 65-hanging rod pegs; 66-connecting the groove plates; 67-supporting rod top pressure plate; 68-template side stay bar; 69-a closing plate position correcting bolt; 70-sliding the transverse plate; 71-connecting a vertical plate; 72-flexible connecting plate; 73-moving the roller; 74-a first slip riser; 75-a second slip riser; 76-vibrating bottom plate; 77-strickling the bottom plate; 78-remainder collection box; 79-surface vibrator; 80-bottom seam layer of the board.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it is to be understood that the terms "open," "upper," "middle," "length," "inner," and the like are used in an orientation or positional relationship for convenience in describing the present invention and for simplicity of description, and do not indicate or imply that the referenced components or elements must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention.
To maintain the following description of the embodiments of the present invention clear and concise, a detailed description of known functions and known components of the invention have been omitted.
Referring to fig. 1 to 9, in the present embodiment, a method for constructing a steel-concrete composite beam is provided, which includes the following steps:
1, preparation of construction: preparing a steel box bottom plate 1, steel box side plates 2, steel box vertical plates 3, vertical partition plates 4 and transverse partition plates 5 which meet the design size requirement; preparing materials and equipment required by construction;
2, assembling the steel box girder: a jig frame first supporting column 7, a jig frame second supporting column 8 and a position correction supporting body 9 are sequentially arranged on a jig frame bottom plate 6, a jig frame supporting plate 10 is arranged on the position correction supporting body 9, and a jig frame top beam 11 is arranged at the top end of the jig frame first supporting column 7 opposite to the mirror image; a box board position-correcting bolt 12 is arranged on the first support column 7 of the jig frame and the top beam 11 of the jig frame; after the position of the jig frame supporting plate 10 is corrected through the position correcting supporting body 9, a step supporting body 13 is arranged between the jig frame supporting plate 10 and the jig frame bottom plate 6; firstly, a steel box bottom plate 1 is arranged on a jig frame supporting plate 10, and then a steel box side plate 2 is connected with a second supporting column 8 of the jig frame and a connecting pressing plate 15 at the end part of a supporting column side lever 14; a transverse partition plate 5 and a vertical partition plate 4 are arranged in a space formed by enclosing a steel box bottom plate 1 and steel box side plates 2, the vertical position of a steel box vertical plate 3 is controlled through a box plate position-correcting bolt 12 on a jig frame first supporting column 7, and the positions of the steel box vertical plate 3 and the vertical partition plate 4 are limited through a box plate position-correcting bolt 12 on a jig frame top beam 11 and a position-controlling transverse plate 16; the vertical partition plate 4 is welded with the steel box bottom plate 1 and the steel box side plate 2, and the transverse partition plate 5 is vertically welded with the vertical partition plate 4;
3, hoisting the first section of steel box girder: arranging a beam bottom support 18 on a pier 17, hoisting a first section of steel box girder which is welded into a whole by a steel box bottom plate 1, a steel box side plate 2 and a steel box vertical plate 3 onto the beam bottom support 18 by adopting external hoisting equipment, and taking the first section of steel box girder as a hoisted box girder 19 when a rear-hoisted steel box girder 59 is constructed;
4, hoisting construction of the rear-hanging steel box girder: a beam top supporting plate 20 is laid on the upper part of the hung box beam 19, the lower surfaces of the steel box side plate 2 and the steel box bottom plate 1 are both provided with a supporting beam hanging rod 21, and the other end of the supporting beam hanging rod 21 is provided with an overhanging supporting beam 22; a support beam connecting rib 23 is arranged between the adjacent cantilever support beams 22; a vertical aligning body 24 is arranged on an overhanging supporting beam 22 at the lower part of a steel box bottom plate 1, a supporting beam side lever 25 is arranged on the overhanging supporting beam 22 at the lower part of a steel box side plate 2, and a lateral aligning rod 26 and an aligning pressing plate 27 are arranged on the side of the supporting beam side lever 25 facing the steel box side plate 2; two sets of bridging tracks 28 are laid on the beam top support plate 20, and each set of bridging track 28 comprises two tracks; two bridging machines 29 are symmetrically arranged on each set of bridging track 28; a hanging beam connecting plate 30 is arranged on the outer side of the bridging track 28, and the hanging beam connecting plate 30 is connected with a hanging sliding beam 31 through a hanging beam hanger rod 32; the rear-hanging steel box girder 59 is hung on the vertical aligning body 24 by using the steel box sling 33 of the bridge girder erection machine 29, the vertical height of the rear-hanging steel box girder 59 is controlled by the vertical aligning body 24, and the transverse position of the rear-hanging steel box girder 59 is controlled by the lateral aligning rod 26;
5, pouring concrete on the beam top: a support plate bottom support rod 34 is arranged on the side surface of the pier 17, and a rod end rotating hinge 35 is arranged at the joint of the support plate bottom support rod 34 and the pier 17; firstly, pouring the beam bottom concrete 36; after the beam bottom concrete 36 forms the strength, arranging full supporting rods 37 and beam supporting columns 38 on the beam bottom concrete 36, arranging column bottom supporting plates 39 at the joint of the beam supporting columns 38 and the beam bottom concrete 36, and arranging top supporting beams 40 at the top ends of the beam supporting columns 38; the outer side wall of the steel box side plate 2 is provided with a support plate connecting plate 41 and a combined support plate 42; a support plate hanging rod 43 is arranged between the combined support plate 42 and the top support beam 40, a plate bottom limiting tenon 44 is arranged at the joint of the lower surface and the support plate bottom supporting rod 34, and a support plate top supporting rod 45 is arranged between the upper surface and the steel box side plate 2; hanging a top plate bottom die 46 and a top plate side die 47 on the full supporting rod 37, and arranging a side die closing plate 48 on the outer side of the top plate side die 47; a supporting platform plate 49 is arranged on the top supporting beam 40, and a vibrating and leveling device 50 is arranged on the supporting platform plate 49; when the beam top concrete 51 is cast, the vibration and strickling device 50 is used to simultaneously vibrate and strickling the beam top concrete 51.
In one aspect of the present embodiment, as shown in fig. 2 to 9, the planar position of the steel box bottom plate 1 is controlled by the position correcting support 9, the step support 13 and the jig support plate 10, and the position of the steel box side plate 2 is controlled by the stay side bar 14 and the stay adjusting bolt 52; a beam top support plate 20 and an overhanging support beam 22 are respectively arranged on the upper surface and the lower part of the suspended box girder 19, and four bridge erecting machines 29 are arranged on the beam top support plate 20; a hanging beam 81 is arranged at the outer side of the hung box beam 19, and a construction hanging basket capable of moving transversely along a hanging plate sliding groove 60 on the hanging sliding beam 31 is arranged at the lower part of the hanging beam 81; arranging a supporting beam pillar 38 on the beam bottom concrete 36, and arranging a top supporting beam 40 on the top end of the supporting beam pillar 38; a support system combined by a combined support plate 42 and a support plate top stay bar 45 is arranged at the lower part of the steel box side mold; a vibratory screed mechanism 50 is provided for moving along a support deck 49 on the roof rail.
The steel box bottom plate 1 is formed by rolling a steel plate with the thickness of 20 mm.
The steel box side plates 2, the steel box vertical plates 3, the vertical partition plates 4 and the transverse partition plates 5 are all formed by rolling steel plates with the thickness of 20 mm.
The bed-jig bottom plate 6 is formed by rolling a steel plate with the thickness of 10 mm.
The jig frame first bracing column 7 and the jig frame second bracing column 8 are both made of steel pipes with the diameter of 100mm and the wall thickness of 4 mm; a second support column 8 of the jig frame is provided with a support column adjusting bolt 52 in threaded connection with the second support column; a rotary spherical hinge 53 is arranged at the top end of the second support column 8 of the jig frame, and the rotary spherical hinge 53 is a spherical hinge with the diameter of 100 mm; a rod bottom support rod 54 is arranged on the side surface of the second support column 8 of the jig frame, the rod bottom support rod 54 is connected with the second support column 8 of the jig frame in a welding mode, and the rod bottom support rod 54 is composed of a screw rod and a bolt, wherein the diameter of the screw rod is 100 mm.
The position correction support 9 adopts a hydraulic jack of 100 tons.
The jig frame supporting plate 10 is formed by rolling a steel plate with the thickness of 10 mm.
The jig frame top beam 11 adopts H-shaped steel with the specification of 200 multiplied by 8 multiplied by 12.
The box board position-correcting bolt 12 is composed of a high-strength screw rod with the diameter of 30mm and a bolt, and the fastening directions of the screw rods on the two sides of the bolt are opposite.
The step support body 13 is formed by welding 2mm steel plates, the cross section of the step support body is in a step shape, and the height of the step is 20 mm.
The pole side lever 14 is formed by rolling a steel pipe with the diameter of 100mm, and a pole bottom limiting tenon 57 is arranged at the joint of the lower surface of the pole bottom side lever and the pole bottom support rod 54. The rod bottom limiting falcon 57 is formed by rolling a steel plate with the thickness of 10 mm.
The connecting pressing plate 15 is formed by rolling a steel plate with the thickness of 10 mm.
The position control transverse plate 16 is formed by rolling a steel plate with the thickness of 10mm, the width of the position control transverse plate is 20cm, and two ends of the position control transverse plate are provided with connecting groove plates 66 connected with the vertical partition plate 4 or the steel box vertical plate 3. The connecting groove plate 66 is formed by rolling a steel plate with the thickness of 10mm, the cross section of the connecting groove plate is U-shaped, and the groove depth is 2 cm.
The concrete strength grade of pier 17 is C50.
The beam bottom support 18 is a rubber shock absorption support.
The height of the hoisted box girder 19 and the rear hanging steel box girder 59 are both 1 m.
The beam top support plate 20 is formed by rolling a steel plate with the thickness of 30 mm.
The supporting beam hanging rod 21 is formed by rolling a steel pipe with the diameter of 30 mm.
The cantilever beam 22 is made of H-shaped steel having a specification of 200 × 200 × 8 × 12.
The brace connecting rib 23 is made of a steel plate with the thickness of 2mm and the width of 20 mm.
The vertical aligning body 24 employs a hydraulic jack of 100 tons.
The supporting beam side rod 25 is formed by rolling a steel pipe with the diameter of 100 mm.
The lateral position-correcting rod 26 is composed of a screw rod and a bolt with the diameter of 60mm, is connected with the supporting beam side rod 25 in a welding mode, and is connected with the position-correcting pressing plate 27 through a pressing plate rotating hinge 58. The position correcting pressure plate 27 is formed by rolling a steel plate with the thickness of 10 mm; the pressure plate rotating hinge 58 adopts a spherical hinge with the diameter of 60 mm.
The bridging rail 28 is formed by rolling a steel plate with the thickness of 10 mm.
The bridge girder erection machine 29 adopts a double-beam type bridge girder erection machine.
The hanging beam connecting plate 30 is formed by rolling a steel plate with the thickness of 20mm, and the width of the hanging beam connecting plate is 30 cm.
The suspension sliding beam 31 is formed by rolling a steel plate with the thickness of 10mm, the width of the suspension sliding beam is 20cm, and the height of the suspension sliding beam is 20 cm; a hanging plate sliding groove 60 is arranged on the hanging sliding beam 31, and the width and the height of the hanging plate sliding groove 60 are 18cm and 10cm respectively; the thickness of the sliding hanging plate 61 is 20mm, and the width is 17 cm; the hanging plate roller 62 is a roller with the diameter of 50 mm. The suspension hanging rod 63 is formed by rolling a steel pipe with the diameter of 50mm, and the lower end of the suspension hanging rod is provided with a construction hanging basket 64; the construction hanging basket 64 is formed by rolling a steel plate with the thickness of 2 mm; the peg 65 is a 20mm diameter bolt.
The hanging beam hanger rod 32 is formed by rolling a steel pipe with the diameter of 60 mm.
The steel box slings 33 are wire ropes of 30mm diameter.
The support plate bottom stay bar 34 is formed by rolling a steel pipe with the diameter of 60 mm.
The rod end rotating hinge 35 adopts a spherical hinge with the diameter of 60 mm.
The beam bottom concrete 36 and the beam top concrete 51 both use concrete with a strength grade of C50.
The full supporting rod 37 is supported by a steel pipe with the diameter of 48 mm.
The beam strut 38 is rolled from a steel tube of 150mm diameter.
The column bottom supporting plate 39 is formed by rolling a steel plate with the thickness of 10 mm.
The top bracing beam 40 is made of H-shaped steel with the specification of 100 × 100 × 6 × 8.
The support plate connecting plate 41 and the combined support plate 42 are both formed by rolling steel plates with the thickness of 10 mm.
The support plate hanging rod 43 is formed by rolling a screw rod with the diameter of 50 mm.
Limiting falcon 44 at the bottom of the plate is formed by rolling a steel plate with the thickness of 10mm, the width of the steel plate is 6cm, and the length of the steel plate is 20 cm.
The supporting plate top supporting rod 45 is made of a steel pipe with the diameter of 60 mm.
The stay bar top pressure plate 67 is formed by rolling a steel plate with the thickness of 10 mm.
The top plate bottom die 46 and the top plate side die 47 are both formed by rolling steel plates with the thickness of 4 mm.
The side mould closing plate 48 is formed by rolling a steel plate with the thickness of 2mm, the cross section of the side mould closing plate is L-shaped, and a closing plate position-correcting bolt 69 is arranged between the side mould closing plate and the side stay bar 68 of the mould plate. The template side stay bar 68 consists of a screw rod and a bolt with the diameter of 20 mm; the closing plate position-correcting bolt 69 is composed of a screw rod and a bolt with the diameter of 20mm, and the length of the bolt is adjustable.
The supporting platform plate 49 is formed by rolling a steel plate with the thickness of 10 mm.
The vibrating and strickling device 50 can synchronously carry out vibrating and strickling construction of the beam top concrete 51, and comprises two sliding transverse plates 70, connecting vertical plates 71 are respectively arranged on the upper surfaces of the two sliding transverse plates 70, a flexible connecting plate 72 is arranged between the two sliding transverse plates 70, and a moving roller 73 is arranged at the lower part of the sliding transverse plates 70; the connecting vertical plate 71 is connected with external rolling and pulling equipment through a position control inhaul cable 55; two rows of moving rollers 73 are respectively arranged between the lower surfaces of the two sliding transverse plates 70 and the supporting platform plate 49. The sliding transverse plate 70 and the connecting vertical plate 71 are both formed by rolling steel plates with the thickness of 10mm, and the flexible connecting plate 72 is a rubber plate with the thickness of 10 mm; the diameter of the movable roller 73 is 100 mm; along the moving direction of the sliding transverse plate 70, the lower surfaces of the two sliding transverse plates 70 are respectively provided with a first sliding vertical plate 74 and a second sliding vertical plate 75, and the first sliding vertical plate 74 and the second sliding vertical plate 75 are both formed by rolling steel plates with the thickness of 10 mm. The vibration base plate 76 is provided with a surface vibrator 79 on the upper surface and a plate bottom joint layer 80 on the lower surface. The vibrating bottom plate 76 is rolled from a steel plate having a thickness of 2 mm. The surface vibrator 79 is a concrete surface vibrator of 1.5 kW.
The position control inhaul cable 55 adopts a steel wire rope with the diameter of 30 mm.
The ribbed plate 56 is rolled from a steel plate having a thickness of 10mm and a height of 10 cm.
The strickle bottom plate 77 is formed by rolling a steel plate with a thickness of 10mm, has a right trapezoid cross section, has a top surface perpendicular to the vertical surface and a bottom surface perpendicular to the upper surface of the beam top concrete 51, and has a width larger than that of the top surface.
The excess material collecting tank 78 is formed by rolling a steel plate with the thickness of 2mm, the height of the excess material collecting tank is 30cm, the width of the excess material collecting tank is 50cm, and an excess material collecting opening with the width of 20cm and the height of 15cm is formed in the side face close to the first sliding vertical plate 74.
The above embodiments may be combined with each other.
It should be noted that in the description of the present specification, descriptions such as "first", "second", etc. are only used for distinguishing features, and do not have an actual order or meaning, and the present application is not limited thereto.
In the description herein, references to the description of "one embodiment," "an example," "a specific example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The preferred embodiments of the invention disclosed above are intended to be illustrative only. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention. The invention is limited only by the claims and their full scope and equivalents.
Claims (9)
1. The construction method of the steel-concrete combined beam is characterized by comprising the following construction steps:
1) construction preparation:
preparing a steel box bottom plate (1), steel box side plates (2), steel box vertical plates (3), vertical partition plates (4) and transverse partition plates (5) which meet the design size requirement; preparing materials and equipment required by construction;
2) assembling the steel box girder:
a bed-jig first supporting column (7), a bed-jig second supporting column (8) and a position correction supporting body (9) are sequentially arranged on a bed-jig bottom plate (6), a bed-jig supporting plate (10) is arranged on the position correction supporting body (9), and a bed-jig top beam (11) is arranged at the top end of the bed-jig first supporting column (7) opposite to the mirror image; a box board position-correcting bolt (12) is arranged on the first support column (7) of the jig and the top beam (11) of the jig; after the position of the jig frame supporting plate (10) is corrected through the correcting supporting body (9), a step supporting body (13) is arranged between the jig frame supporting plate (10) and the jig frame bottom plate (6); firstly, a steel box bottom plate (1) is arranged on a jig frame supporting plate (10), and then a steel box side plate (2) is connected with a second supporting column (8) of the jig frame and a connecting pressing plate (15) at the end part of a supporting column side lever (14); a transverse partition plate (5) and a vertical partition plate (4) are arranged in a space formed by enclosing a steel box bottom plate (1) and steel box side plates (2), the vertical position of a steel box vertical plate (3) is controlled through a box plate position-correcting bolt (12) on a jig frame first supporting column (7), and the positions of the steel box vertical plate (3) and the vertical partition plate (4) are limited through a box plate position-correcting bolt (12) on a jig frame top beam (11) and a position-controlling transverse plate (16); the vertical partition plate (4) is welded with the steel box bottom plate (1) and the steel box side plate (2), and the transverse partition plate (5) is vertically welded with the vertical partition plate (4);
3) hoisting a first section of steel box girder:
arranging a beam bottom support (18) on a pier (17), hoisting a first section of steel box girder which is welded into a whole by a steel box bottom plate (1), a steel box side plate (2) and a steel box vertical plate (3) to the beam bottom support (18) by adopting external hoisting equipment, and taking the first section of steel box girder as a hoisted box girder (19) when a rear-hoisting steel box girder (59) is constructed;
4) hoisting construction of a rear-hanging steel box girder:
a beam top supporting plate (20) is laid on the upper part of the hung box beam (19), the lower surfaces of the steel box side plate (2) and the steel box bottom plate (1) are provided with beam supporting hanging rods (21), and the other end of each beam supporting hanging rod (21) is provided with a cantilever supporting beam (22); support beam connecting ribs (23) are arranged between the adjacent cantilever support beams (22); a vertical aligning body (24) is arranged on an overhanging supporting beam (22) at the lower part of a steel box bottom plate (1), a supporting beam side lever (25) is arranged on the overhanging supporting beam (22) at the lower part of a steel box side plate (2), and a lateral aligning rod (26) and an aligning pressing plate (27) are arranged on the side of the supporting beam side lever (25) facing the steel box side plate (2); laying two sets of bridging tracks (28) on the beam top support plate (20), wherein each set of bridging track (28) comprises two tracks; two bridging machines (29) are symmetrically arranged on each set of bridging track (28); a hanging beam connecting plate (30) is arranged on the outer side of the bridging track (28), and the hanging beam connecting plate (30) is connected with a hanging sliding beam (31) through a hanging beam hanging rod (32); a steel box sling (33) of a bridge girder erection machine (29) is adopted to hoist the rear-hanging steel box girder (59) on a vertical aligning body (24), the vertical height of the rear-hanging steel box girder (59) is controlled by the vertical aligning body (24), and the transverse position of the rear-hanging steel box girder (59) is controlled by a lateral aligning rod (26);
5) and (3) beam top concrete pouring construction:
a support plate bottom support rod (34) is arranged on the side surface of the pier (17), and a rod end rotating hinge (35) is arranged at the joint of the support plate bottom support rod (34) and the pier (17); pouring construction of beam bottom concrete (36) is carried out firstly; after the beam bottom concrete (36) forms the strength, arranging full supporting rods (37) and beam supporting pillars (38) on the beam bottom concrete (36), arranging pillar bottom supporting plates (39) at the joint of the beam supporting pillars (38) and the beam bottom concrete (36), and arranging top supporting beams (40) at the top ends of the beam supporting pillars (38); a support plate connecting plate (41) and a combined support plate (42) are arranged on the outer side wall of the steel box side plate (2); a support plate hanging rod (43) is arranged between the combined support plate (42) and the top supporting beam (40), a plate bottom limiting tenon (44) is arranged at the joint of the lower surface and the support plate bottom supporting rod (34), and a support plate top supporting rod (45) is arranged between the upper surface and the steel box side plate (2); hanging a top plate bottom die (46) and a top plate side die (47) on the full supporting rod (37), and arranging a side die closing plate (48) on the outer side of the top plate side die (47); a supporting platform plate (49) is arranged on the top supporting beam (40), and a vibrating and leveling device (50) is arranged on the supporting platform plate (49); when the beam top concrete (51) is cast, the vibration and strickling construction of the beam top concrete (51) is synchronously carried out by adopting the vibration strickling device (50).
2. A construction method of a steel-concrete composite beam as recited in claim 1, characterized in that in step 2), a bracing column adjusting bolt (52) is arranged on the second bracing column (8) of the jig frame, a rotary spherical hinge (53) is arranged at the top end of the second bracing column (8) of the jig frame, a bottom bracing rod (54) is arranged on the side surface of the second bracing column (8) of the jig frame, and is connected with the side bracing column (14) through the rotary spherical hinge (53); the box plate position-correcting bolt (12) consists of a bolt and a screw rod, and the fastening directions of the screw rods on the two sides of the bolt are opposite; the step support body (13) is formed by welding steel plates, and the cross section of the step support body is in a step shape; a reinforced rib plate (56) is arranged on the steel box bottom plate (1); the support column side rods (14) are formed by rolling steel pipes, and rod bottom limiting tenons (57) are arranged at the joint of the lower surfaces of the support column side rods and the rod bottom support rods (54).
3. The construction method of a steel-concrete composite beam according to claim 2, wherein the bottom stay (54) is composed of a bolt and a screw, the fastening directions of the screws on both sides of the bolt are opposite, and the bolt is welded and connected with the second stay (8) of the jig frame; the position correction support body (9) adopts a hydraulic jack; and both ends of the position control transverse plate (16) are provided with connecting groove plates (66) connected with the vertical partition plate (4) or the steel box vertical plate (3).
4. The construction method of the steel-concrete composite beam as claimed in claim 1, wherein in the step 4), the lateral alignment rod (26) is connected with the side rod (25) of the supporting beam in a welding way, and is connected with the alignment pressure plate (27) through a pressure plate rotating hinge (58); the position correcting pressure plate (27) is made of a steel plate and is attached to the outer surface of the rear hanging steel box girder (59); the hanging sliding beam (31) is formed by rolling a steel plate, a hanging plate sliding groove (60) is arranged on the hanging sliding beam, and a sliding hanging plate (61) and a hanging plate roller (62) are arranged in the hanging plate sliding groove (60); the sliding hanging plate (61) can transversely move along a hanging plate sliding groove (60) on the hanging sliding beam (31) under the action of external traction equipment, and a hanging rod (63) is arranged on the lower surface of the sliding hanging plate.
5. The construction method of a steel-concrete composite beam according to claim 4, wherein the suspension hanging rods (63) are rolled by steel pipes, the lower ends of the suspension hanging rods are provided with construction hanging baskets (64), and the connected suspension hanging rods (63) are connected through hanging rod studs (65); the construction hanging basket (64) is formed by rolling steel, has a U-shaped cross section and is arranged between two parallel hanging sliding beams (31).
6. The construction method of the steel-concrete composite beam as claimed in claim 1, wherein in the step 5), the top end of the supporting plate jacking stay bar (45) is provided with the rod end rotating hinge (35) and the supporting plate jacking plate (67) in sequence; the beam bottom support (18) adopts a rubber shock absorption support; the cross section of the side mould closing plate (48) is L-shaped, and a closing plate position correcting bolt (69) is arranged between the side mould closing plate and the side template stay bar (68); the side stay bar (68) of the template is rolled into an L shape by adopting a screw rod; the closing plate position-correcting bolt (69) comprises a screw rod and a bolt, and the length of the closing plate position-correcting bolt is adjustable.
7. The construction method of the steel-concrete composite beam as claimed in claim 6, wherein the vibrating and strickling device (50) can synchronously vibrate and strickling the beam top concrete (51), and comprises two sliding transverse plates (70), connecting vertical plates (71) are respectively arranged on the upper surfaces of the two sliding transverse plates (70), a flexible connecting plate (72) is arranged between the two sliding transverse plates (70), and the connecting vertical plates (71) are connected with external rolling and pulling equipment through position control guys (55).
8. The construction method of a steel-concrete composite beam according to claim 7, wherein a row of moving rollers (73) is respectively arranged between the lower surfaces of the two slip transverse plates (70) and the supporting platform plate (49); and a first sliding vertical plate (74) and a second sliding vertical plate (75) are respectively arranged on the lower surfaces of the two sliding transverse plates (70) along the moving direction of the sliding transverse plates (70).
9. The construction method of a steel-concrete composite beam according to claim 8, wherein a vibration bottom plate (76) and a strickle bottom plate (77) are respectively arranged at the bottom ends of the first sliding riser (74) and the second sliding riser (75), a surplus material collecting tank (78) is arranged on the upper surface of the strickle bottom plate (77), a surface vibrator (79) is arranged on the upper surface of the vibration bottom plate (76), and a plate bottom joint layer (80) is arranged on the lower surface; the cross section of the strickling bottom plate (77) is in a right trapezoid shape, the bottom surface of the trapezoid is connected with the upper surface of the beam top concrete (51), and the width of the bottom surface is larger than that of the top surface.
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| CN111576249A (en) * | 2020-06-04 | 2020-08-25 | 安徽省公路桥梁工程有限公司 | Novel ultra-wide overhanging combined guy rope hanging basket |
| CN113279334B (en) * | 2021-05-19 | 2022-09-27 | 安徽省路港工程有限责任公司 | Construction method of one-step pouring molding system of double-column type vase pier steel template |
| CN113931363A (en) * | 2021-10-27 | 2022-01-14 | 中铁三局集团建筑安装工程有限公司 | Construction method of steel truss and profiled steel plate concrete composite floor |
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