CN217896169U - Eccentric half-width steel-concrete combined box girder total splicing structure - Google Patents
Eccentric half-width steel-concrete combined box girder total splicing structure Download PDFInfo
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- CN217896169U CN217896169U CN202121834487.5U CN202121834487U CN217896169U CN 217896169 U CN217896169 U CN 217896169U CN 202121834487 U CN202121834487 U CN 202121834487U CN 217896169 U CN217896169 U CN 217896169U
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- 239000004567 concrete Substances 0.000 title claims abstract description 53
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 36
- 239000010959 steel Substances 0.000 claims abstract description 36
- 239000002131 composite material Substances 0.000 claims abstract description 30
- 238000000034 method Methods 0.000 claims abstract description 18
- 239000011150 reinforced concrete Substances 0.000 claims abstract description 10
- 239000011178 precast concrete Substances 0.000 claims abstract description 7
- 239000004744 fabric Substances 0.000 claims abstract description 5
- 210000001503 joint Anatomy 0.000 claims description 16
- 238000005192 partition Methods 0.000 claims description 14
- 238000003466 welding Methods 0.000 claims description 7
- 229910001294 Reinforcing steel Inorganic materials 0.000 claims description 3
- 238000005259 measurement Methods 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 abstract description 14
- 238000007599 discharging Methods 0.000 abstract description 4
- 230000011218 segmentation Effects 0.000 abstract 1
- 238000010276 construction Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 230000003014 reinforcing effect Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
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Abstract
The utility model relates to a length 32.25m, wide 17.8m, weight surpasss 539 tons of eccentric half width steel reinforced concrete combination box girder and always pieces together the structure, on the bed-jig is always pieced together to the long line method, control eccentric half width segment and realize six segmentations always piece together with each two whole width of cloth roof beam sections in its length direction both ends, control adopt the temporary connection of temporary matching spare to become whole between the eccentric half width segment, guarantee half width segment matching dimension each other and half width segment and the whole accuracy of always piecing together of whole width of cloth segment that faces mutually around with. The advantages are that: the ultra-large eccentric half-width steel-concrete composite beam adopts integral assembly and integral tire discharging, so that the problem of tire discharging of an ultra-large and ultra-heavy eccentric beam section is solved while the integral manufacturing precision is ensured; secondly, hoisting and overlapping of the large overweight precast concrete bridge deck are realized; thirdly, the support and the transportation of the half-width eccentric reinforced concrete combined box girder are realized, and the convenience and the rapidness are realized; fourthly, the integral manufacturing precision of the eccentric half-width steel-concrete combined box girder is realized.
Description
Technical Field
The utility model relates to a length 32.25m, wide 17.8m, weight exceed 539 tons of eccentric half width steel reinforced concrete combination box girder and always piece together structure belongs to large-scale bridge and makes the field.
Background
The super large eccentric half width steel-concrete combined box girder is of a novel structure, and the technical application of industrial manufacturing is not available at present. The ultra-large eccentric half-width steel-concrete composite beam has the characteristics of large structure size, heavy segment mass, eccentric structure and high structure size manufacturing precision, and the manufacturing of the ultra-large eccentric half-width steel-concrete composite beam mainly has the following manufacturing problems: the structure has the advantages that the structure is overlong in size, overweight in weight, eccentric in structure, high in requirements on manufacturing precision of the segments and matching precision of the segments adjacent to the segments, and the precision control is a manufacturing difficulty; secondly, the concrete prefabricated bridge deck is 30 to 50 tons, the hoisting weight of a common single hoisting crane cannot meet the hoisting requirement due to large span of a total splicing line, and the hoisting, assembling and overlapping control of the concrete prefabricated bridge deck is a manufacturing difficulty; thirdly, the difficulty of manufacturing how to get out of the tire after the total assembly of the segments is caused by overlong structural size, overweight mass and eccentric structure; fourthly, transportation, support and the like of the eccentric half-width reinforced concrete combined box girder after the tyre is removed are difficult points in the manufacturing process.
Disclosure of Invention
The design purpose is as follows: the defects in the background art are avoided, and the eccentric half-width steel-concrete combined box girder total splicing structure with the length of 32.25m, the width of 17.8m and the weight of over 539 tons is designed.
The design scheme is as follows: the utility model discloses in the eccentric half width of cloth steel-concrete combination case roof beam of super large mentioned, long 32.25m, wide 17.8m, weight surpass 539 tons, owing to be eccentric, overlength, superstructure, the total play child, segment section transportation, support, wet seam pouring deformation control and shipment transportation etc. that assemble of precision, decking coincide precision, combination roof beam of festival section all face the difficulty. In order to overcome the industrial manufacturing of the oversized eccentric steel-concrete combined box girder and ensure the construction quality, original novel manufacturing technology, supporting tools, transportation methods and other construction technologies are systematically developed.
The utility model discloses an eccentric half width of cloth steel reinforced concrete combination box girder always pieces together structure includes: the left and right half-width steel-concrete combined box girders are integrally spliced; hoisting and assembling the precast concrete bridge deck by using the overlong lifting frame type hoisting tool; constructing a transverse wet joint of the bridge deck; four beam transporting flat cars are connected in parallel to synchronously support and transport the left and right half-width steel-concrete combined box girders to integrally discharge tires; supporting the eccentric overweight half-width steel-concrete combined box girder segment by utilizing a developed integrated supporting pier bracket tooling system; and four girder transporting flat cars are also utilized to transport the eccentric sections in parallel.
Eccentric half width of steel reinforced concrete composite box roof beam always piece together structure, contain and include:
1. the eccentric half-width steel-concrete combined box girder is assembled in a general way: on the long-line method general assembly jig frame, the left and right eccentric half sections and two whole beam sections at two ends of the length direction of the left and right eccentric half sections are integrally and temporarily connected by temporary matching parts, so that the matching size of the half sections and the overall assembly precision of the half sections and the front and rear adjacent whole sections are ensured.
2. Supporting in the half width steel-concrete combined box girder: in order to increase the integral rigidity of the left half steel beam and the right half steel beam, rigid supports are added in the half steel-concrete composite beam before the overweight precast concrete bridge deck and the half steel beam are overlapped and assembled, so that the accuracy guarantee is provided for the overlapping of the bridge deck.
3. Assembling and welding the prefabricated bridge deck and the steel beam: on the measuring towers on two sides of the general assembly line, the steel beam and the bridge deck base line are taken as references, the position of the prefabricated bridge deck is monitored, measured and adjusted by using a total station, the matching and positioning of the prefabricated bridge deck and the steel beam precision are guaranteed by using auxiliary adjustment such as a frame type lifting appliance and a jack, after the assembling precision is guaranteed, the pre-embedded steel members of the bridge deck and the partition plates of the steel beam and the butt welding seams of the flange plates are welded, so that the prefabricated bridge deck and the partition plates are integrated.
4. And (3) performing transverse wet joint construction of the half-width prefabricated bridge deck: and welding the embedded reinforcing steel bars of the transverse wet joints between the bridge deck plates, bolting the splice plates, and pouring the transverse wet joints to connect the prefabricated bridge deck plates into a whole.
5. The left and right half-width steel-concrete combined box girders are temporarily connected and integrally discharged: [1] and temporary connecting flitches (7) are welded at the positions of top flange plate butt joints (2111), clapboard butt joints (2131) and bottom plate butt joints (2121) in the middle parts of the left half-width steel-concrete composite beam and the right half-width steel-concrete composite beam, so that the left half-width eccentric beam section and the right half-width eccentric beam section are temporarily connected into a whole. [2] And (3) dismantling movable beams above the beam conveying channel of the total assembly jig frame, connecting four beam conveying flat cars more than 300 tons in parallel, supporting beam sections by the four beam conveying cars at the front and the back of each side lane, and synchronously walking and conveying the beam sections to be discharged, thereby ensuring the uniform stress and the stable support of the four cars.
6. And (3) supporting and transporting the half-width eccentric reinforced concrete combined box girder: [1] according to the gravity center position of the eccentric half-width steel-concrete composite beam section, an integrated support pier bracket tooling system is developed and comprises support frames connected with a half-width steel-concrete composite beam inclined bottom plate and steel support piers connected with a flat bottom plate, each support frame spans two or three cross partition plates, four or six integrated steel support piers are bolted under a box beam partition plate, a gap between a support frame bottom leveling plate and a steel support pier top plate is controlled through adjusting bolt connection bolts, and an adjusting base plate is added to adjust the height of the support beam section, so that the purpose of ensuring uniform stress of each support point in the supporting process is achieved. [2] After the semi-width eccentric steel-concrete combined box girder section is discharged, firstly, a developed integrated supporting pier bracket tooling system is utilized to support the temporarily connected left and right semi-width steel-concrete combined box girder sections, and after the uniform stress of a fulcrum is ensured, a top plate, a bottom plate, a partition plate temporary matching piece and a temporary reinforcing flitch in the middle of the left and right semi-width steel-concrete combined box girder sections are dismantled, so that the left and right eccentric semi-width steel-concrete combined box girder is separated.
The technical scheme is as follows: the utility model provides an eccentric half width reinforced concrete combination box girder always pieces together structure, on the always piece together bed-jig of long line method, about eccentric half width section and its length direction both ends respectively two whole width of beams sections realize six sections long line method always pieces together, adopt the temporary connection piece temporary connection to become whole between the eccentric half width section about, guarantee half width section matching dimension each other and half width section and the whole of whole width of beams section that faces mutually in front and back always pieces together the precision.
Compared with the background art, the utility model, firstly, the oversized eccentric half-width steel-concrete composite beam adopts integral assembly and integral tire discharging, thereby solving the tire discharging problem of the oversized and overweight eccentric beam section while ensuring the integral manufacturing precision; secondly, the left and right eccentric half-width steel-concrete composite beams are temporarily consolidated and are integrally discharged by four parallel beam transporting flatcars; thirdly, transporting and supporting the eccentric steel-concrete composite beam section through a developed integrated support pier bracket tool system; and fourthly, transporting the oversized eccentric half-width reinforced concrete composite beam by utilizing four parallel beam transporting flat cars.
Drawings
FIG. 1 is a schematic diagram of the temporary connection and support of left and right half-width steel-concrete composite beams.
Fig. 2 is a simplified schematic diagram of fig. 1.
Fig. 3 is a schematic view of the parallel connection of four girder transporting vehicles and the tire discharge of the whole body.
Fig. 4 is a schematic top view of fig. 3.
Fig. 5 is a schematic cross-sectional view of a half-width eccentric steel-concrete composite beam.
FIG. 6 is a schematic cross-sectional view of the other partition positions of the half-width eccentric steel-concrete composite beam.
Fig. 7 is a schematic top view of a half-width eccentric steel-concrete composite beam.
Fig. 8 is a simplified schematic of fig. 7.
Fig. 9 is a schematic diagram of the frame type sling structure form and use.
Fig. 10 is a side schematic view of fig. 9.
Fig. 11 isbase:Sub>A schematic sectional view ofbase:Sub>A portionbase:Sub>A-base:Sub>A in fig. 9.
Fig. 12 is a schematic sectional view of part B-B in fig. 9.
Fig. 13 is a total assembly of 6 segments in a continuous match.
Figure 14 is a schematic view of a transverse wet seam connection between decking boards.
Fig. 15 is a schematic view of an integrated support pier bracket tooling system and a schematic view of support transportation.
Fig. 16 is a schematic top view of fig. 15.
Detailed Description
The present invention will be further explained with reference to fig. 1 to 16.
1. The steel beam at the bottom of the eccentric half-width steel-concrete combined box girder is assembled:
on the long-line method general assembly jig frame 1, six-segment long-line method general assembly is realized by the steel beam 21 at the bottom of the left and right eccentric half-width combined beam segment 2 and two whole segments 3 at two ends in the length direction of the beam together, the left and right eccentric half-width segments are temporarily connected into a whole by the temporary matching piece 4, and the matching size among the half-width segments and the whole general assembly precision of the half-width segments and the whole sections 3 adjacent to each other in the front and back are ensured.
2. In order to increase the integral rigidity of the left half steel beam and the right half steel beam, before the overweight precast concrete bridge deck 22 and the half steel beam 21 are overlapped and assembled, the rigid support 5 is added in the half steel-concrete composite beam, so that the precision guarantee is provided for the overlapping of the bridge deck. The process that the precast concrete bridge deck is assembled and welded with the steel beam into a whole through the pre-buried steel members is called superposition assembly.
3. Overlength is lifted and is hung formula frame hoist 6 and is included frame girder 61, frame girder 61 upper portion sets up the lug 62 that is used for connecting two cranes hoist wire rope, frame girder 61 lower part sets up the lug 63 that is used for connecting prefabricated decking 22 hoist and mount silk rope, lug 62 position assurance is located prefabricated decking 22 hoisting point directly over, and through adjusting the length of horizontal bridge to both sides hoisting point wire rope 64, the aerial gesture when realizing decking hoist and mount is unanimous with 2% cross slope of bridge floor, guarantees decking atress safe and reliable.
4. On the measuring towers 101 on two sides of the general assembly line, the steel beam and the bridge deck base line are taken as references, the total station is used for monitoring, measuring and adjusting the position of the prefabricated bridge deck 22, the frame type lifting appliance 6, the jack and other auxiliary adjustment are used for ensuring the precision matching and positioning with the steel beam 21, and after the assembly precision is ensured, the embedded steel members of the bridge deck 22, the partition plates of the steel beam 22 and the flange plate butt-joint welding lines are welded to form a whole.
5. And welding transverse wet joint embedded reinforcing steel bars 231 between the bridge deck plates 22, bolting splicing plates 232, and pouring the transverse wet joints 23 to connect the prefabricated bridge deck plates into a whole.
6. And temporary connecting flitch plates 7 are welded at the positions of the top flange plate butt joint 2111, the clapboard butt joint 2131 and the bottom plate butt joint 2121 in the middle of the left half-width steel-concrete composite beam and the right half-width steel-concrete composite beam, so that the left half-width eccentric beam section 2 and the right half-width eccentric beam section 2 are temporarily connected into a whole.
7. The movable beams above the beam conveying channels in the long-line method assembly jig frame 1 are dismantled, four beam conveying flat cars 8 with the weight of more than 300 tons are connected in parallel, two beam conveying cars are respectively arranged at the front and the back of each side track, the four cars simultaneously support beam sections, the four cars synchronously walk to convey the beam sections to be discharged, and the four cars are guaranteed to be evenly stressed and stably supported.
8. According to the gravity center position of the eccentric half-width steel-concrete composite beam section 2, the integrated support pier bracket tooling system 9 comprises support frames 91 which are discontinuously welded with the inclined bottom plate of the half-width steel-concrete composite beam 2 and steel support piers 92 which are connected with the bottom plate, wherein each support frame 91 spans two or three cross partition plates, four or six integrated steel support piers 92 are bolted under the box beam partition plate, a gap between a leveling plate at the bottom of each support frame 91 and the top plate of the steel support pier 92 is controlled by adjusting bolt bolts, and an adjusting base plate 93 is added to adjust the height of each support beam section, so that the purpose of ensuring the uniform stress of each support point in the supporting process is achieved.
9. After the semi-width eccentric steel-concrete combined box girder section is discharged, firstly, a researched and developed integrated supporting pier bracket tooling system 9 is utilized to support the temporarily connected left and right semi-width steel-concrete combined box girder sections 2, and after the uniform stress of a fulcrum is ensured, a flange plate, a bottom plate, a partition plate temporary matching piece 4 and a temporary reinforcing flitch 7 in the middle of the left and right semi-width steel-concrete combined box girder sections 2 are removed, so that the left and right eccentric semi-width steel-concrete combined box girders are separated.
10. Four girder transporting flat cars 8 of more than 200 tons are connected in parallel, two girder transporting cars are respectively arranged at the front and the back of each side lane, the four cars simultaneously lift the height supporting beam section, the supporting piers are guaranteed to be synchronously moved to transport the half-width beam section 2 after being separated from the ground, the four cars are guaranteed to be uniformly stressed and stably supported, and the supporting frame 91 and the integrated supporting piers are connected in parallel
It is to be understood that: although above-mentioned embodiment is right the utility model discloses a design has done more detailed word description, but these word descriptions, are only right the utility model relates to a simple word description of idea, rather than right the utility model relates to a restriction of idea, any do not surpass the utility model relates to a combination, increase or the modification of idea all fall into the utility model discloses a within the protection scope.
Claims (7)
1. The utility model provides an eccentric half width of cloth reinforced concrete combination box girder always pieces together structure, characterized by: on a long-line-method general assembly jig frame (1), six-section long-line-method general assembly is realized by a steel beam (21) at the bottom of a left eccentric half-width composite beam section (2) and two whole sections (3) at two ends of the left eccentric half-width composite beam section and the right eccentric half-width composite beam section in the length direction, the left eccentric half-width section and the right eccentric half-width section are temporarily connected into a whole by a temporary matching part (4), and the matching size between the half-width sections and the whole general assembly precision of the half-width section and the whole section (3) adjacent to each other in the front and at the back are ensured.
2. The eccentric half width steel-concrete combined box girder total splicing structure as claimed in claim 1, which is characterized in that: the six-segment long-line method general assembly refers to two eccentric half-width segments and four whole-width segments (3).
3. The eccentric half width steel-concrete combined box girder total splicing structure as claimed in claim 1, which is characterized in that: the six-segment long-line method general assembly means that on a long-line method general assembly jig frame (1), the jig frame is used as an outer tire for controlling the section size of a segment, the two sides of the jig frame are used for measuring in pairs by measuring towers (101) to assist in measurement, a flange plate unit (211), a bottom plate unit (212), a partition plate unit (213), a middle web plate unit (214), a longitudinal partition plate unit (215), a side web plate unit (216) and a cantilever arm unit (217) of left and right eccentric half-range combination beam segments (2) and four steel beams (21) at the bottom of a whole segment (3) are sequentially matched, assembled and welded in a matching way, so that the section sizes of the steel beams (21) at the bottoms of the six segments are ensured to be matched uniformly, the matching misalignment amount of top flange plate butt joints (2111), bottom plate butt joints (2121) and partition plate butt joints (2131) between left and right eccentric half sections is required to be less than or equal to 1.0mm, the matching deviation of the plate unit butt joints between the left and right eccentric half combined beam sections (2) and the whole section (3) and between the whole section (3) and the whole section (3) is required to be less than or equal to 2.0 mm, the linear deviation L/3000 of top surface elevations of the left and right eccentric half combined beam sections (2) and the four whole sections (3) is required to be L which is the total splicing length of the sections and is in unit mm, and the linear precision of the top surface elevation of the combined beam steel beam is realized by uniformly distributing top surface elevations of supporting plates (11) on a long-line-method total splicing jig (1).
4. The eccentric half width steel-concrete combined box girder total splicing structure as claimed in claim 3, which is characterized in that: before the overweight precast concrete bridge deck (22) and the half-width steel beam are overlapped and assembled, rigid supports (5) are added in the half-width steel-concrete composite beam, so that the accuracy guarantee is provided for the overlapping of the bridge deck.
5. The eccentric half-width steel-concrete combined box girder total splicing structure as claimed in claim 4, wherein: and welding transverse wet joint embedded reinforcing steel bars (231) between the bridge deck plates, bolting splicing plates (232), and pouring a transverse wet joint (23) to connect the prefabricated bridge deck plates into a whole.
6. The eccentric half width steel-concrete combined box girder total splicing structure as claimed in claim 4, which is characterized in that: the process that the precast concrete bridge deck (22) is assembled and welded with the steel beam into a whole through the pre-buried steel members is called as superposed assembly.
7. The eccentric half width steel-concrete combined box girder total splicing structure as claimed in claim 4, which is characterized in that: and (3) welding temporary connecting attachment plates (7) at the positions of the top flange plate butt joint seam (2111), the partition plate butt joint seam (2131) and the bottom plate butt joint seam (2121) in the middle of the left half width steel-concrete composite beam and the right half width steel-concrete composite beam so as to temporarily connect the left half width composite beam segment and the right half width composite beam segment into a whole.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114000409A (en) * | 2021-08-07 | 2022-02-01 | 中铁宝桥（扬州）有限公司 | Eccentric half-width steel-concrete combined box girder assembly structure |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114000409A (en) * | 2021-08-07 | 2022-02-01 | 中铁宝桥（扬州）有限公司 | Eccentric half-width steel-concrete combined box girder assembly structure |
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