CN113186794B - Construction method of corrugated steel web reinforced concrete combined prestressed box girder - Google Patents
Construction method of corrugated steel web reinforced concrete combined prestressed box girder Download PDFInfo
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- CN113186794B CN113186794B CN202110414561.6A CN202110414561A CN113186794B CN 113186794 B CN113186794 B CN 113186794B CN 202110414561 A CN202110414561 A CN 202110414561A CN 113186794 B CN113186794 B CN 113186794B
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 56
- 239000010959 steel Substances 0.000 title claims abstract description 56
- 238000010276 construction Methods 0.000 title claims abstract description 25
- 239000011150 reinforced concrete Substances 0.000 title claims abstract description 13
- 238000005192 partition Methods 0.000 claims abstract description 41
- 238000003466 welding Methods 0.000 claims abstract description 21
- 238000004519 manufacturing process Methods 0.000 claims abstract description 20
- 230000007246 mechanism Effects 0.000 claims abstract description 19
- 238000000034 method Methods 0.000 claims abstract description 15
- 238000003825 pressing Methods 0.000 claims abstract description 6
- 238000007781 pre-processing Methods 0.000 claims abstract description 3
- 230000000670 limiting effect Effects 0.000 claims description 45
- 239000004567 concrete Substances 0.000 claims description 15
- 238000007723 die pressing method Methods 0.000 claims description 2
- 239000002023 wood Substances 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 7
- 238000009415 formwork Methods 0.000 description 9
- 210000001364 upper extremity Anatomy 0.000 description 9
- 238000005452 bending Methods 0.000 description 5
- 230000003014 reinforcing effect Effects 0.000 description 5
- 239000000463 material Substances 0.000 description 3
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 2
- 230000000712 assembly Effects 0.000 description 2
- 238000000429 assembly Methods 0.000 description 2
- 238000005422 blasting Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 238000013003 hot bending Methods 0.000 description 2
- 239000011513 prestressed concrete Substances 0.000 description 2
- 230000037452 priming Effects 0.000 description 2
- 239000003351 stiffener Substances 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 210000003205 muscle Anatomy 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
- 230000000171 quenching effect Effects 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 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
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K37/00—Auxiliary devices or processes, not specially adapted for a procedure covered by only one of the other main groups of this subclass
- B23K37/04—Auxiliary devices or processes, not specially adapted for a procedure covered by only one of the other main groups of this subclass for holding or positioning work
- B23K37/0426—Fixtures for other work
- B23K37/0435—Clamps
-
- 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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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Mechanical Engineering (AREA)
- Bridges Or Land Bridges (AREA)
Abstract
The application relates to a construction method of a corrugated steel web reinforced concrete combined prestressed box girder, which belongs to the technical field of box girder construction and comprises the following steps: s1, preprocessing a steel plate; s2, blanking and manufacturing of the first upper flange plate: paying off and blanking the steel plate according to the size of the first upper flange plate, and leveling after blanking is finished; s3, manufacturing a web plate unit: blanking the steel plate according to the size of the corrugated plate before the corrugated plate is not pressed, and pressing the corrugated plate after blanking; a positioning mechanism for accurately positioning the corrugated plate and the first upper flange plate is erected on the first upper flange plate, and the corrugated plate is welded with the first upper flange plate after being positioned; s4, manufacturing a bottom plate: blanking the bottom plate, and then carrying out deformation correction; s5, manufacturing a separator: blanking the partition plate, and forming artificial holes on the partition plate; s6, welding a partition plate on the bottom plate; s7, welding a web plate unit on the bottom plate; s8, installing temporary hoisting points and hoisting, and the method has the effects of improving the positioning precision of the corrugated steel web and ensuring the efficiency of subsequent site construction.
Description
Technical Field
The application relates to the technical field of box girder construction, in particular to a construction method of a corrugated steel web reinforced concrete combined prestressed box girder.
Background
The box girder is one of the middle girders in bridge engineering, the inner part of the box girder is hollow, and flanges are arranged on two sides of the upper part of the box girder and are similar to a box, so that the box girder is named. Single boxes, multiple boxes, etc. The steel box girder is also called steel plate box girder, and is a common structural form for large-span bridges. The steel box girder is generally used on bridges with large span, and is called as a steel box girder because the shape of the steel box girder is like a box.
The corrugated steel web plate PC bridge is a short name of a corrugated steel web plate prestressed concrete box girder bridge, namely a box girder using a corrugated steel plate to replace a concrete web plate of a prestressed concrete box girder as a web plate, and is characterized in that a steel plate with the thickness of 10-20 mm is used to replace a concrete web plate with the thickness of 30-80 cm. In the manufacture of the box girder, the corrugated steel web is deviated in the initial welding stage,
aiming at the related technologies, the inventor thinks that the deviation of the large-span box girder at the initial positioning stage of the corrugated plate is changed into the large-distance deviation at the later welding stage, and the positioning precision of the corrugated steel web is poor, so that the difficulty of the subsequent correction construction steps is improved, and the defect of influencing the subsequent field construction efficiency exists.
Disclosure of Invention
In order to achieve the effects of improving the positioning accuracy of the corrugated steel web and ensuring the subsequent field construction efficiency, the application provides a construction method of the corrugated steel web reinforced concrete combined prestressed box girder.
A construction method of a corrugated steel web reinforced concrete combined prestressed box girder comprises the following steps:
s1, preprocessing a steel plate;
s2, blanking and manufacturing of the first upper flange plate: paying off and blanking the steel plate according to the size of the first upper flange plate, and leveling after blanking is finished;
s3, manufacturing a web plate unit: blanking the steel plate according to the size of the corrugated plate before the corrugated plate is not pressed, and pressing the corrugated plate after blanking; the first upper flange plate is welded with a stud; a positioning mechanism for accurately positioning the corrugated plate and the first upper flange plate is erected on the first upper flange plate, and the corrugated plate is welded with the first upper flange plate after being positioned;
s4, manufacturing a bottom plate: blanking the bottom plate, and then carrying out deformation correction;
s5, manufacturing a separator: blanking the partition plate, and forming artificial holes on the partition plate;
s6, welding a partition plate on the bottom plate;
s7, welding a web plate unit on the bottom plate;
and S8, installing the temporary hoisting point and hoisting.
By adopting the technical scheme, the leveling and the deformation correction of the bottom plate are carried out after the blanking of the top plate is finished, so that the accuracy of the connection between the components is ensured, convenience is provided for the assembly welding of the box girder, and the subsequent construction steps are convenient to carry out; through positioning mechanism with wave form board and first upper limb listrium accurate positioning, then with first upper limb listrium and wave form board welding, when wave form board and bottom plate welding, because the wave form board has welded with first upper limb listrium, has had the fixed stay, the volume that wave form board self produced the deformation displacement reduces, wave form board changes accurate welding when welding with the bottom plate again to reach promotion wave shape steel web positioning accuracy, guarantee follow-up site operation efficiency's effect.
Optionally, positioning mechanism includes locating component and split bolt, locating component is provided with two, locating component includes locating piece and connecting plate, logical groove has been seted up on the locating piece, it passes through locating piece both ends terminal surface to lead to the groove level, and the notch sets up towards the wave plate, connecting plate and locating piece outer wall fixed connection, the connecting plate is located logical groove one side, first upper flange board edge and logical groove inlay card, two locating piece symmetric distribution are in first upper flange board both sides, split bolt runs through two connecting plates fixedly, the locating piece is close to wave plate department and wave plate butt this moment.
Through adopting above-mentioned technical scheme, inlay two locating piece symmetries inlay on the edge of first upper limb listrium both sides, through the taut fixed of connecting plate on to the stay bolt with two locating pieces to taut with two locating pieces, two locating pieces support the wave form board tight, thereby realize the accurate location of wave form board and first upper limb listrium.
Optionally, every fixedly connected with limiting plate on the locating piece, limiting plate and locating piece outer wall fixed connection, limiting plate and connecting plate are located logical groove both sides, and the limiting plate is close to the lateral wall and the wave plate butt of wave plate, and limiting plate horizontal direction length is greater than the distance between the adjacent crest of wave plate.
Through adopting above-mentioned technical scheme, the area of contact of locating piece with the wave plate has been increased in setting up of limiting plate, makes that the locating piece is more abundant carry on spacingly to the wave plate.
Optionally, in S3, first stiffening ribs are welded to the corrugated plate, a limiting groove is formed in the positioning block, the limiting groove is vertically formed, the limiting groove penetrates through end faces of two ends of the positioning block, the first stiffening ribs are close to the positioning block and are inserted into the limiting groove, the end faces of the first stiffening ribs close to the corrugated plate are abutted to the corrugated plate, and the end faces of the first stiffening ribs close to the first upper flange plate are abutted to the first upper flange plate.
Through adopting above-mentioned technical scheme, the bearing capacity of wave form board has been strengthened in setting up of first stiffening rib, the antitorque performance of wave form board has been improved simultaneously, make the wave form board more stable, and first stiffening rib inserts through spacing groove and locating piece and inlays the cooperation, when adding first strength rib and receive along wave form board length direction's horizontal impact force, the locating piece plays limiting displacement to first stiffening rib, spacing cooperation each other, the stability after first stiffening rib is fixed has been promoted, the completion is to wave form board bearing and the reinforcing of antitorque performance.
Optionally, in S5, a second upper flange plate is welded to the top of the partition plate, and a stud is also welded to the top of the second upper flange plate.
Through adopting above-mentioned technical scheme, the bearing capacity of case roof beam has been strengthened to the setting up of baffle, and the setting up of second upper limb listrium has increased the area of contact at baffle and follow-up case roof beam top, and follow-up case roof beam top concreting, when second upper limb listrium increases baffle and concrete area of contact, the setting of peg can be connected spacingly with the inside atress muscle of concrete, makes follow-up case roof beam top of pouring fully be connected with the baffle.
Optionally, in S5, a stiffening ring is welded to the partition board, the stiffening ring is located at the artificial hole, and an outer wall of the stiffening ring is welded to an inner wall of the artificial hole.
Through adopting above-mentioned technical scheme, seting up of hand hole provides convenience for workman's welding box girder, shuttles back and forth between each component, and the setting of stiffening ring has promoted the bearing capacity of artifical accuse department baffle, has compensatied because seting up the phenomenon that the baffle holding power reduces of hand hole.
Optionally, in S4 and S5, the bottom plate is welded with a second stiffening rib, and a groove for the second stiffening rib to penetrate through the partition is formed on the corresponding partition.
Through adopting above-mentioned technical scheme, the pressure-bearing capacity and the anti-shear capacity of bottom plate have been strengthened to setting up of second stiffening rib to reach the effect that promotes the whole bearing capacity of case roof beam.
Optionally, a support assembly is arranged between the second stiffening rib and the corrugated plate, the support assembly comprises a steel bar section, a sleeve and a distance adjusting pipe, a partition is arranged inside the sleeve, one end of the steel bar section is inserted into the sleeve and abutted against the partition, and the other end of the steel bar section is abutted against a pouring template matched with the corrugated plate; one end of the distance adjusting pipe is inserted into one end, far away from the steel bar section, of the sleeve and is in threaded connection with the sleeve, and the other end of the distance adjusting pipe is abutted to the second stiffening rib.
Through adopting above-mentioned technical scheme, the case roof beam basic frame welds the back that finishes, the wave plate trough all need pour the concrete towards the inside department of case roof beam, adopt the template to prop up the mould during concreting, and supporting component cooperation positioning mechanism supports the template, positioning mechanism supports template upper portion and wave plate tightly, and the template lower part supports tightly through supporting component, with reinforcing bar section one end and template butt, the sleeve pipe rotates, make the roll adjustment pipe keep away from reinforcing bar section one end and second stiffening rib butt, thereby accomplish the support of supporting component to the template lower part, make full use of the structure that has existed on bottom plate and the first upper limb listrium, and supporting component convenient to carry, it is convenient to make, the reinforcing bar section alright ground connection of drawing materials at the construction site.
Optionally, in S3, the tolerance of the corrugated plate during blanking is controlled within ± 2mm, the thickness of the corrugated plate is required to be equal to or greater than 15 times of the corner radius in the manufacturing process, the corrugated plate is formed by cold forming, the forming process adopts a die pressing method or a stamping method, the corrugated plates are separated by battens in the stacking process of the finished corrugated plate, and the number of stacked layers of the corrugated plate is not more than 5.
By adopting the technical scheme, the arrangement of the corner radius avoids the influence on the strength of the corrugated plate and the control of blanking errors caused by overlarge bending of the corrugated plate, and is convenient for assembling each part of the subsequent box girder; the corrugated plates can be prefabricated quickly according to actual conditions by adopting corresponding different processes, the stacking height of the finished corrugated plates is limited, the finished corrugated plates are protected from extrusion deformation, and the bending precision of the corrugated plate finished products is ensured.
Optionally, the partition plate is inserted into the limiting groove at the intersection of the partition plate and the positioning block, and the partition plate is abutted against the limiting plate at the position close to the limiting plate.
Through adopting above-mentioned technical scheme, when the position that the locating piece was placed produced with the baffle and intersects, the baffle is close to that locating piece department directly inserts and inlays at the spacing inslot, forms spacing each other, resists the horizontal impact force along case roof beam length direction jointly, promotes the stability after welding each other.
In summary, the present application includes at least one of the following beneficial technical effects:
1. the positioning mechanism is arranged for positioning the corrugated plate and the first upper flange plate, and the corrugated plate is kept in a stable state after being welded with the first upper flange plate, so that the welding precision of the subsequent corrugated plate and the bottom plate is improved;
2. the positioning mechanism is matched with the first stiffening rib, so that the stability after welding is improved, and meanwhile, a supporting structure is provided for supporting the template during concrete pouring in the box girder;
3. the supporting component is arranged, matched with the positioning mechanism, and provides a supporting structure for supporting the template during the concrete and pouring in the box girder at the position without the first stiffening rib.
Drawings
FIG. 1 is a schematic diagram of the overall structure of an embodiment of the present application;
FIG. 2 is a schematic diagram of a portion of an embodiment of the present application;
FIG. 3 is a partially enlarged schematic view of portion A of FIG. 2;
FIG. 4 is a sectional view of a portion of the structure embodying the support assembly.
Description of the reference numerals: 1. a web unit; 11. a corrugated plate; 111. a first stiffener; 12. a first upper flange plate; 13. a stud; 2. a base plate; 21. a second stiffener; 3. a partition plate; 31. artificial holes; 32. a stiffening ring; 33. a second upper flange plate; 34. beveling; 4. a positioning mechanism; 41. a positioning assembly; 411. positioning blocks; 412. a connecting plate; 42. oppositely pulling the bolts; 5. a through groove; 6. a limiting plate; 7. a limiting groove; 8. a support assembly; 81. a steel bar section; 82. a sleeve; 821. separating; 83. a distance adjusting pipe; 9. and (5) template.
Detailed Description
The present application is described in further detail below with reference to figures 1-4.
The embodiment of the application discloses a construction method for a corrugated steel web steel-concrete combined prestressed box girder.
The method comprises the following steps:
s1, steel plate pretreatment, derusting the steel plate by using a shot blasting machine, priming and drying in a workshop, and ensuring that the derusting quality of the steel reaches Sa3.0 level, wherein the process flow is carried out according to the flow of the derusting channel Sa3.0 by shot blasting, cleaning surface floating dust and spraying the priming paint in the workshop.
Referring to fig. 1, S2, first upper flange plate 12 blanking manufacture: paying off and blanking are carried out on the steel plate according to the size of the first upper flange plate 12, and leveling is carried out after blanking is finished, wherein the first upper flange plate 12 is rectangular plate-shaped in the embodiment.
Referring to fig. 1, S3, web element 1 manufacture: blanking the steel plate according to the size of the corrugated plate 11 before pressing, leveling after blanking, detecting the size, controlling the error within +/-2 mm when the corrugated plate 11 is blanked, and pressing the corrugated plate 11 after the corrugated plate is qualified.
Referring to fig. 1, the corrugated sheet 11 may be pressed by cold forming, and the forming process may be a stamping method or a punching method. The cold bending processing operation is carried out in a workshop, the ambient temperature is not lower than-5 ℃, the bending radius of the inner side is not less than 15 times of the plate thickness, otherwise, a hot bending process is adopted in a factory, and the hot bending temperature is controlled between 600 ℃ and 700 ℃. And after the machining is finished, checking and correcting, wherein thermal correction can be adopted, the temperature is controlled to be 600-700 ℃, the corrected part is slowly cooled along with air, hammering or quenching with water is not needed before the part is cooled to the room temperature, and obvious dents and other damages cannot be caused on the surface of the corrected part. The qualified corrugated plates 11 are stacked by adopting battens to separate the corrugated plates 11, and the number of stacked layers of the corrugated plates 11 is not more than 5, so that the bending precision of the corrugated plates 11 is ensured.
Referring to fig. 1, the studs 13 are welded on the first upper flange plate 12, a plurality of studs 13 are welded on the first upper flange plate 12, all the studs 13 are distributed on the side wall of one side of the first upper flange plate 12 in a rectangular array, and the arrangement of the studs 13 enables the reinforcing bars in the concrete top plate to be connected with the studs 13 when the subsequent box girder concrete top plate is poured, so as to enhance the connectivity between the box girder concrete top plate and other structures of the box girder.
Referring to fig. 2 and 3, the first upper flange plate 12 is provided with a positioning mechanism 4, and the positioning mechanism 4 is used for accurately positioning the corrugated plate 11 and the first upper flange plate 12. The positioning mechanism 4 is provided in plurality, and adjacent positioning mechanisms 4 are arranged at intervals along the length direction of the first upper flange plate 12. The single positioning mechanism 4 comprises two positioning assemblies 41 and a split bolt 42, wherein the two positioning assemblies 41 are symmetrically arranged on two sides of the first upper flange plate 12. The positioning assembly 41 includes a positioning block 411 and a connecting plate 412, and the positioning block 411 is a rectangular block in this embodiment. Set up logical groove 5 on the locating piece 411, logical groove 5 level is seted up, and the vertical lateral wall in locating piece 411 both sides is opened thoroughly to logical groove 5 both ends, leads to 5 rabbets in the setting of first last flange board 12 of logical groove orientation, and the edge of first last flange board 12 is inserted and is inlayed in leading to groove 5. After the positioning blocks 411 are horizontally inserted and embedded in the first upper flange plate 12, the connecting plates 412 are fixed above the positioning blocks 411 and are perpendicular to the top surfaces of the positioning blocks 411, and the counter-pulling bolts 42 penetrate through the two connecting plates 412 in the single positioning mechanism 4, so that the two positioning blocks 411 are tensioned, and the positioning blocks 411 are close to the end surfaces of the corrugated plate 11 to tightly press the corrugated plate 11.
Referring to fig. 2 and 3, in order to improve the abutting and limiting effect of the positioning block 411 on the corrugated plate 11, the positioning block 411 is fixed with a limiting plate 6, and the limiting plate 6 is a rectangular strip plate in the present embodiment, and may have other shapes. For convenience of description, the positioning block 411 is horizontally inserted and embedded on the first upper flange plate 12 in a current description state, the limiting plate 6 is located on the bottom surface of the positioning block 411 and is perpendicular to the positioning block 411, the side surface of the limiting plate 6, which is over against the corrugated plate 11, and the end surface, close to the corrugated plate 11, of the positioning block 411 are located on the same vertical plane, and the distance of the limiting plate 6 along the horizontal length direction of the corrugated plate 11 is not less than the distance between adjacent wave crests of the corrugated plate 11. The limiting plate 6 is tightly abutted to the corrugated plate 11, so that the contact area between the positioning block 411 and the corrugated plate 11 is increased.
Referring to fig. 1 and 3, in order to increase the bearing capacity and the torsion resistance of the corrugated plate 11, first stiffening ribs 111 are welded on the corrugated plate 11, and in a vertical state of the corrugated plate 11, the first stiffening ribs 111 are positioned on the side walls of the corrugated plate 11 near the inside of the box girder, and the first stiffening ribs 111 are vertically arranged. Limiting groove 7 has been seted up on the locating piece 411, limiting groove 7 is vertical to be seted up, locating piece 411 is opened thoroughly at the both ends of the vertical direction of limiting groove 7, and limiting groove 7 is close to the inside department of case roof beam and also opens thoroughly locating piece 411 to be convenient for first stiffening rib 111 inserts and inlays in locating piece 411, first stiffening rib 111 inserts and inlays in locating piece 411 back, first stiffening rib 111 top surface and the 12 butt of first upper limb listrium, first stiffening rib 111 is close to limiting plate 6 department and limiting plate 6 butt.
Referring to fig. 2 and 3, to fully illustrate the effect of the first stiffening rib 111 and the positioning block 411, the basic frame of the box girder is welded, concrete is required to be poured from the troughs of the corrugated plate 11 towards the interior of the box girder, the formwork 9 is adopted for formwork erection when concrete is poured, and the formwork 9 is required to be fixed when formwork erection is carried out. After the positioning block 411 is fixed on the first upper flange plate 12, the side wall of the limiting plate 6 close to the corrugated plate 11 is abutted against the template 9, so that the upper part of the template 9 is fixed. First stiffening rib 111 is close to limiting plate 6 department and 6 butts of limiting plate, and surpasss limiting plate 6 and shelter from department and template 9 butts, and echelonment recess and limiting plate 6 adaptations have been seted up to first stiffening rib 111 near limiting plate 6 department promptly. The first stiffening rib 111 is inserted into the positioning block 411 and then welded with the positioning block 411, and the middle part and the lower part of the formwork 9 are supported by the first stiffening rib 111. Grouting holes are formed in the template 9, and the positions of the grouting holes on the template 9 are determined according to the conditions of a construction site.
Referring to fig. 1, S4, floor 2 fabrication: the bottom plate 2 is blanked and then deformation correction is performed. The second stiffening ribs 21 are arranged on the base plate 2, the number of the second stiffening ribs 21 is two in the implementation, the length directions of the two second stiffening ribs 21 are arranged along the length direction of the base plate 2 at intervals, and the pressure bearing capacity and the anti-shearing capacity of the base plate 2 are enhanced by the arrangement of the second stiffening ribs 21.
Referring to fig. 1 and 2, S5, separator 3 manufacture: 3 baiting of baffle, open hand hole 31 on baffle 3, supply the manual work to pass baffle 3, and set up groove 34 on baffle 3, groove 34 sets up the position and corresponds second stiffening rib 21 and set up the position and set up, thereby 3 welding of baffle of being convenient for are on bottom plate 2, 3 welding of perpendicular bottom plate of baffle 2, and baffle 3 is close to wave plate 11 department and has the locating piece 411, baffle 3 inserts promptly and inlays in spacing groove 7, baffle 3 is close to wave plate 11 department and limiting plate 6 welded fastening. When concrete is poured, the side walls of the partition plates 3 close to the corrugated plates 11 are abutted against the formwork 9 beyond the range shielded by the limiting plates 6, so that the formwork 9 is supported.
Referring to fig. 2, a stiffening ring 32 is arranged on the partition board 3, the outer wall of the stiffening ring 32 is welded with the hole wall of the artificial hole 31, and the stiffening ring 32 enhances the pressure resistance of the partition board 3. The top of the partition board 3 is provided with a second upper flange plate 33, the second upper flange plate 33 is in a rectangular strip shape in this embodiment, the second upper flange plate 33 is horizontally and vertically arranged on the partition board 3, the side wall of the second upper flange plate 33 away from the partition board 3 is also welded with a plurality of studs 13, and all the studs 13 on the second upper flange plate 33 are distributed on the second upper flange plate 33 in a lifting array.
Referring back to fig. 1, S6 is to weld the diaphragm 3 on the bottom plate 2, and then to position and weld the corrugated plate 11 on the first upper flange plate 12;
referring to fig. 1 and 2, the web unit 1, the corrugated plate 11, the first upper flange plate 12 and the studs 13 are welded to the base plate 2 at S7, and the combination is referred to as the web unit 1. When the web plate unit 1 is welded, the positioning block 411 of the partition plate 3 is inserted into and welded with the partition plate 3, and the template 9 is required to be placed at a corresponding position during welding, so that the corresponding template 9 is fixed and limited by matching with the positioning block 411 after the partition plate 3 is welded; when the first stiffening rib 111 is welded, the corresponding template 9 is placed at the designated position, and after the first stiffening rib 111 is welded, the effect that the first stiffening rib 111 is matched with the positioning block 411 to limit and fix the corresponding template 9 is achieved.
And S8, installing a temporary hoisting point and hoisting, wherein mechanical correction or thermal correction can be adopted according to the structural form of the part if the part is deformed in the manufacturing, hoisting and transporting processes.
Referring to fig. 1 and 4, after the box girder is assembled, the template 9 is placed at the position corresponding to the corrugated plate 11, the template 9 does not need to be placed again at the positions with the first stiffening ribs 111 and the partition plates 3, the template 9 needs to be placed at the positions, facing the inside of the box girder, of the troughs of the rest of the corrugated plates 11, the top of the template 9 is limited and supported by the positioning mechanism 4, and the supporting component 8 is arranged between the top and the second stiffening ribs 21. The supporting component 8 is matched with the second stiffening rib 21 to support and position the bottom of the formwork 9.
Referring to fig. 4, the support assembly 8 includes a steel bar section 81, a sleeve 82 and a distance adjusting pipe 83, a partition 821 is arranged inside the sleeve 82, the partition 821 divides the inside of the sleeve 82 into two spaces, one end of the steel bar section 81 is inserted into the sleeve 82 and abutted against the partition 821, and the other end of the steel bar section is abutted against the formwork 9; one end of the distance adjusting pipe 83 is inserted and embedded in one end of the sleeve far away from the reinforcing steel bar section 81 and is in threaded connection with the sleeve 82, and the other end of the distance adjusting pipe 83 is abutted to the second stiffening rib 21. The operation is simple, the reinforcing steel bar section 81 can be made of local materials on the construction site, and the materials are convenient to obtain.
The embodiments of the present invention are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereby, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.
Claims (8)
1. A construction method of a corrugated steel web reinforced concrete combined prestressed box girder is characterized by comprising the following steps of: the method comprises the following steps:
s1, preprocessing a steel plate;
s2, blanking and manufacturing the first upper flange plate (12): paying off and blanking the steel plate according to the size of the first upper flange plate (12), and leveling after blanking is finished;
s3, manufacturing a web element (1): blanking the steel plate according to the size of the corrugated plate (11) before pressing, and pressing the corrugated plate (11) after blanking; a stud (13) is welded on the first upper flange plate (12); a positioning mechanism (4) for accurately positioning the corrugated plate (11) and the first upper flange plate (12) is erected on the first upper flange plate (12), and the corrugated plate (11) is welded with the first upper flange plate (12) after being positioned;
s4, manufacturing of the bottom plate (2): blanking the bottom plate (2), and then carrying out deformation correction;
s5, manufacturing of the separator (3): blanking the partition board (3), and forming a manual hole (31) in the partition board (3);
s6, welding a partition plate (3) on the bottom plate (2);
s7, welding a web plate unit (1) on the bottom plate (2);
s8, installing a temporary hoisting point and hoisting;
the positioning mechanism (4) comprises a positioning assembly (41) and a split bolt (42), the number of the positioning assembly (41) is two, the positioning assembly (41) comprises a positioning block (411) and a connecting plate (412), a through groove (5) is formed in the positioning block (411), the through groove (5) penetrates through the end faces of two ends of the positioning block (411) horizontally, a notch is arranged towards the corrugated plate (11), the connecting plate (412) is fixedly connected with the outer wall of the positioning block (411), the connecting plate (412) is located on one side of the through groove (5), the edge of the first upper flange plate (12) is clamped and embedded in the through groove (5), the two positioning blocks (411) are symmetrically distributed on two sides of the first upper flange plate (12), the split bolt (42) penetrates and fixes the two connecting plates (412), and the positioning block (411) is abutted to the corrugated plate (11) at a position close to the corrugated plate (11); s3 the welding has first stiffening rib (111) on wave plate (11), spacing groove (7) have been seted up on locating piece (411), spacing groove (7) are vertical to be seted up, locating piece (411) both ends terminal surface is passed through in spacing groove (7), inlay in spacing groove (7) is inserted to first stiffening rib (111) department near locating piece (411), terminal surface and wave plate (11) butt that first stiffening rib (111) are close to wave plate (11) department, terminal surface and first upper flange board (12) butt that first stiffening rib (111) are close to first upper flange board (12).
2. The construction method of the corrugated steel web reinforced concrete combined prestressed box girder as claimed in claim 1, wherein: every fixedly connected with limiting plate (6) on locating piece (411), limiting plate (6) and locating piece (411) outer wall fixed connection, limiting plate (6) and connecting plate (412) are located logical groove (5) both sides, and lateral wall and wave plate (11) butt that limiting plate (6) are close to wave plate (11), and limiting plate (6) horizontal direction length is greater than the distance between the adjacent crest of wave plate (11).
3. The construction method of the corrugated steel web reinforced concrete combined prestressed box girder as claimed in claim 1, wherein: in the S5, a second upper flange plate (33) is welded to the top of the partition plate (3), and a stud (13) is also welded to the top of the second upper flange plate (33).
4. The construction method of the corrugated steel web steel-concrete combined prestressed box girder as claimed in claim 1, wherein: in the S5, a stiffening ring (32) is welded on the partition board (3), the stiffening ring (32) is located at the artificial hole (31), and the outer wall of the stiffening ring (32) is welded with the inner wall of the artificial hole (31).
5. The construction method of the corrugated steel web reinforced concrete combined prestressed box girder as claimed in claim 1, wherein: and in the S4 and S5, the bottom plate (2) is welded with a second stiffening rib (21), and a groove (34) for the second stiffening rib (21) to penetrate through the partition plate (3) is formed in the corresponding partition plate (3).
6. The construction method of the corrugated steel web reinforced concrete combined prestressed box girder as claimed in claim 5, wherein: a supporting assembly (8) is arranged between the second stiffening ribs (21) and the corrugated plate (11), the supporting assembly (8) comprises a steel bar section (81), a sleeve (82) and a distance adjusting pipe (83), a partition (821) is arranged inside the sleeve (82), one end of the steel bar section (81) is inserted into the sleeve (82) and is abutted against the partition (821), and the other end of the steel bar section is abutted against a pouring template (9) matched with the corrugated plate (11); one end of the distance adjusting pipe (83) is inserted and embedded at one end, far away from the steel bar section (81), of the sleeve and is in threaded connection with the sleeve (82), and the other end of the distance adjusting pipe (83) is abutted to the second stiffening rib (21).
7. The construction method of the corrugated steel web reinforced concrete combined prestressed box girder as claimed in claim 6, wherein: s3, when the corrugated plate (11) is blanked, the error is controlled within +/-2 mm, the thickness of a steel plate with the corner radius larger than or equal to 15 times is required to be guaranteed in the manufacturing process of the corrugated plate (11), cold forming is adopted for forming of the corrugated plate (11), a die pressing method or a stamping method is adopted for forming, wood is adopted for separating the corrugated plates (11) in the stacking process of the finished corrugated plate (11), and the number of stacked layers of the finished corrugated plate (11) is not more than 5.
8. The construction method of the corrugated steel web reinforced concrete combined prestressed box girder as claimed in claim 1, wherein: the partition plate (3) is inserted into the limiting groove (7) at the intersection of the locating block (411) and the partition plate (3), and the partition plate (3) is abutted against the limiting plate (6) at the position close to the limiting plate (6).
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| CN114310101A (en) * | 2021-11-30 | 2022-04-12 | 华工法利莱切焊系统工程有限公司 | Bridge steel box girder partition plate and bottom plate assembly system |
| CN116551283A (en) * | 2023-05-10 | 2023-08-08 | 中国十七冶集团有限公司 | Positioning device for tunnel steel arch frame connecting steel plate and construction method |
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| KR100192940B1 (en) * | 1995-12-14 | 1999-06-15 | 양재신 | Clamp for welding panel |
| CN101864729A (en) * | 2010-06-25 | 2010-10-20 | 清华大学 | A cable-stayed bridge corrugated steel web composite box girder deck system and its construction method |
| CN203062169U (en) * | 2013-01-30 | 2013-07-17 | 中国十七冶集团有限公司 | Positioning device for assembling and welding H section steel |
| CN103878519B (en) * | 2013-12-30 | 2015-08-05 | 湖北弘毅建设有限公司 | A kind of centering clamping Ripple Sternum group founds machine |
| CN104278642A (en) * | 2014-10-29 | 2015-01-14 | 江苏省交通科学研究院股份有限公司 | Corrugated steel web prefabricated assembly |
| CN108145354A (en) * | 2017-12-28 | 2018-06-12 | 绍兴腾阳机械有限公司 | A kind of adaptive welding equipment of the corrugated web of shaped steel |
| CN211395383U (en) * | 2019-11-01 | 2020-09-01 | 中楚工程勘察设计咨询有限公司 | Connecting and positioning device for corrugated steel web |
| CN212122176U (en) * | 2020-01-15 | 2020-12-11 | 南京明辉建设有限公司 | Temporary positioning and fixing clamp for overhead installation of section steel beam |
| CN212000657U (en) * | 2020-04-01 | 2020-11-24 | 西安公路研究院 | A large-span corrugated steel web horizontal positioning device |
| CN112453831B (en) * | 2020-11-11 | 2024-09-24 | 中铁二十五局集团第五工程有限公司 | Manufacturing and welding process of steel box girder |
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