CN107119553B - Steel box girder precast slab and manufacturing method thereof - Google Patents
Steel box girder precast slab and manufacturing method thereof Download PDFInfo
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- CN107119553B CN107119553B CN201710396919.0A CN201710396919A CN107119553B CN 107119553 B CN107119553 B CN 107119553B CN 201710396919 A CN201710396919 A CN 201710396919A CN 107119553 B CN107119553 B CN 107119553B
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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
- E01D19/00—Structural or constructional details of bridges
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B23/00—Arrangements specially adapted for the production of shaped articles with elements wholly or partly embedded in the moulding material; Production of reinforced objects
- B28B23/02—Arrangements specially adapted for the production of shaped articles with elements wholly or partly embedded in the moulding material; Production of reinforced objects wherein the elements are reinforcing members
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Abstract
The invention belongs to the technical field of municipal engineering construction, and particularly relates to a steel box girder precast slab and a manufacturing method thereof, wherein the steel box girder precast slab comprises a steel mould in the precast slab, a steel reinforcement cage is placed in the steel mould, and a plurality of lifting rings are uniformly fixed on the left side and the right side of the steel reinforcement cage; the steel mould comprises a main mould and side moulds which are fixed together through bolts, the side moulds are fixed at the front end and the rear end of the main mould, and reinforcing steel bar holes are uniformly formed in vertical plates of the side moulds; the reinforcement cage comprises an upper layer of main reinforcements and a lower layer of main reinforcements, the lower layer of main reinforcements penetrate through reinforcement holes of steel die side dies and extend out of the prefabricated plate, the upper layer of main reinforcements are located between the front side die and the rear side die of the steel die, the stirrups penetrate and tie the upper layer of main reinforcements and the lower layer of main reinforcements, the planes of the stirrups are parallel to the side dies, and tie wires are tied between the upper layer of main reinforcements and the lower layer of main reinforcements and the stirrups.
Description
Technical Field
The invention belongs to the technical field of municipal engineering construction, and particularly relates to a steel box girder precast slab and a manufacturing method thereof.
Background
The precast slabs are indispensable elements for bridge engineering in municipal engineering, particularly steel box girder precast slabs, and are widely applied. At present, in the process of manufacturing a steel box girder precast slab, a steel bar needs to be integrally precast and formed firstly and then is arranged in a shaped template, in the laying process, due to the fact that deviation exists between a main rib and the template, the position of the main rib on the whole precast slab is changed, the line shape is disturbed and is not easy to control, the main rib at the tail end of an outer leakage is crossed, the distance between the main ribs is uneven, the design requirement cannot be met, the quality of the finally manufactured precast slab is difficult to guarantee, the construction efficiency is low, and therefore the engineering cost is increased. The prior manufacturing technology has no measures for ensuring the uniform spacing of the main ribs and the parallel of the tail ends of the leakage, and the shape of the precast slab formed by casting has errors.
Disclosure of Invention
The invention aims to overcome the defects of the background art and provides a steel box girder precast slab and a manufacturing method thereof.
The invention is realized by the following technical scheme:
a steel box girder precast slab comprises a steel mould in the precast slab, wherein the precast slab is formed by pouring the steel mould, a steel reinforcement cage is placed in the steel mould, a plurality of hanging rings are uniformly fixed on the left side and the right side of the steel reinforcement cage, and the height of each hanging ring is higher than that of the precast slab; the steel mould comprises a main mould and side moulds which are fixed together through bolts, the main mould is integrally arched, two sides of the main mould are planes, the middle of the main mould is an arched surface, the side moulds are fixed at the front end and the rear end of the main mould, each side mould comprises a vertical plate and a side plate, and reinforcing steel bar holes are uniformly formed in the vertical plates; the steel reinforcement cage includes upper main muscle and lower floor's main muscle, and lower floor's main muscle passes the reinforcing bar hole of steel mould side form and stretches out outside the prefabricated plate, and upper main muscle is located between the front and back side form of steel mould, and upper main muscle and lower floor's main muscle all match with the shape of steel mould, and upper main muscle and lower floor's main muscle place plane are vertical face, and the stirrup is worn to restraint ligature upper main muscle and lower floor's main muscle, and upper main muscle and lower floor's main muscle are located stirrup upper and lower position respectively, and stirrup place plane is parallel with the side form, and the ligature silk has between upper main muscle and lower floor's main muscle and the stirrup.
The upper layer main reinforcement and the lower layer main reinforcement are preferably threaded steel bars.
The invention also comprises a manufacturing method of the steel box girder precast slab, which comprises the following steps:
(1) Manufacturing a positioning frame: manufacturing a rectangular frame with supporting legs at four corners, wherein a plurality of pairs of vertical limiting columns are upwards fixed on four sides of the rectangular frame, the limiting columns on the wide sides correspond to reinforcing steel bar holes in the side die of the steel die one by one, the limiting columns on the opposite sides of the rectangular frame correspond to one another in position, and the manufacturing of the positioning frame is finished;
(2) Fixing the lower main rib: firstly, respectively placing three lower-layer main reinforcements in two edge limiting columns on the wide side of a positioning frame and a limiting column in the middle position, then binding hoops vertically penetrating through the three lower-layer main reinforcements, binding two adjacent lower-layer main reinforcements in the same hoops, placing the hoops in the limiting columns corresponding to the long side, then sequentially penetrating the hoops from the rest limiting columns on the wide side to place the rest lower-layer main reinforcements, manually adjusting the plane where each lower-layer main reinforcement is located to be a vertical plane after the placement of the lower-layer main reinforcements is completed, and preliminarily binding and fixing the lower-layer main reinforcements through binding wires;
(3) Fixing the upper main rib: sequentially penetrating a plurality of upper main reinforcements at the upper parts in the stirrups, wherein the upper main reinforcements are parallel to the lower main reinforcements, and binding the upper main reinforcements on the stirrups through binding wires to perform primary fixation;
(4) Fixing a hanging ring: sleeving and fixing a plurality of hanging rings on the lower-layer main reinforcement, wherein the plane where the hanging rings are located is parallel to the wide side of the positioning frame, and the hanging rings are uniformly fixed on the left side and the right side of the steel reinforcement cage, so that the steel reinforcement cage is manufactured;
(5) The steel reinforcement cage combines with the steel mould: placing a reinforcement cage in a steel mould main die, enabling both ends of an upper layer main rib to be positioned in the steel mould main die, respectively enabling reinforcement holes of a side die of the steel mould to penetrate through both ends of a lower layer main rib, and respectively fixing the side die at the front end and the rear end of the main die through bolts;
(6) The adjusting frame is adjusted and fixed: the adjusting frame is a rectangular frame, adjusting columns are vertically welded downwards to the long sides of the adjusting frame, the adjusting frame is placed on the stirrups, the lower-layer main reinforcements and the upper-layer main reinforcements are further adjusted through the adjusting frame, the planes of the upper-layer main reinforcements and the lower-layer main reinforcements are vertical, and then binding wires are tightened to be finally fixed;
(7) Pouring and forming: and (5) pouring concrete on the steel mould in the step (6) and in the reinforcement cage, and forming the concrete into a precast slab with the same shape as the steel mould, so that the precast slab is manufactured.
As a preferable scheme:
in the step (1), the positioning frame is formed by welding steel bars, and the limiting columns are welded on four edges of the positioning frame by adopting sectional steel bars.
In the step (1), the distance between each pair of limiting columns is 1-5cm larger than the diameter of the main rib, namely the distance between two limiting columns in each pair of limiting columns.
The invention has the beneficial effects that:
according to the steel box girder precast slab and the manufacturing method thereof, the lower-layer main reinforcement and the upper-layer main reinforcement are accurately positioned through the positioning frame and the adjusting frame, the problems that the end of the main reinforcement of the precast slab is crossed, the line shape is not easy to control, the distance is not uniform and the like are solved, the construction efficiency and the quality are improved, the loss and the cost are reduced, the manufacturing method is simple, the cost is low, the steel box girder precast slab can be recycled and is convenient to popularize.
Drawings
Fig. 1 is a schematic structural diagram of a poured precast slab.
Fig. 2 is a schematic structural view of a main mold and a side mold of the steel mold of the present invention.
Fig. 3 is a schematic view showing the shapes of the upper layer reinforcing bars and the lower layer reinforcing bars according to the present invention.
Fig. 4 is a schematic structural view of the positioning frame of the present invention.
Fig. 5 is a schematic structural view of the adjusting bracket of the present invention.
Fig. 6 is a schematic top view of the reinforcement cage of the present invention.
Fig. 7 is a schematic structural view of the reinforcement cage tie bar of the present invention.
Fig. 8 is a schematic structural view of the reinforcement cage of the present invention inserting the lower layer of main reinforcement into the stirrup.
Fig. 9 is a schematic structural view of the reinforcement cage according to the present invention, wherein upper main reinforcements are inserted into the stirrups.
FIG. 10 is a schematic side view of a master mold of the steel mold of the present invention.
In the figure, 1 precast slab, 2 steel reinforcement cage, 3 hoisting ring, 4 main mould, 5 side mould, 6 plane, 7 arch surface, 8 vertical plate, 9 side plate, 10 reinforcing bar hole, 11 upper layer main bar, 12 lower layer main bar, 13 hoop bar, 14 positioning frame, 15 spacing column, 16 adjusting frame and 17 adjusting column.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, 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 some, but not all, embodiments of the present invention. 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.
The steel box girder precast slab comprises a steel mould in a precast slab 1, wherein the precast slab 1 is formed by pouring the steel mould, and the shape of the precast slab is consistent with the overall appearance of the steel mould. The steel reinforcement cage 2 is placed in the steel mould, a plurality of lifting rings 3 are uniformly fixed on the left side and the right side of the steel reinforcement cage 2, the lifting rings 3 are bound with the steel reinforcement cage 2 in a perpendicular mode, the lifting rings 3 are higher than the prefabricated plate 1, the lifting rings 3 are used for lifting the prefabricated plate 1 by a crane later, the lifting rings are generally applied in engineering manufacture, and the structure and the installation of the lifting rings 3 are not described again.
The steel mould comprises a main mould 4 and side moulds 5 fixed at the front end and the rear end of the main mould 4 through bolts, the main mould 4 and the side moulds 5 form an arc-shaped groove in a surrounding mode, the main mould 4 is integrally arched, two sides of the main mould 4 are planes 6, the middle of the main mould 4 is an arched surface 7, as shown in a schematic side view of the main mould in figure 10, each side mould 5 comprises a vertical plate 8 and a side plate 9, and reinforcing steel bar holes 10 are uniformly formed in the vertical plates 8 of the side moulds 5, as shown in figure 2.
The reinforcement cage 2 includes upper main muscle 11 and lower floor's main muscle 12, and upper main muscle 11 and lower floor's main muscle 12 are parallel to each other, and the length of upper main muscle 11 is less than lower floor's main muscle 12, and lower floor's main muscle 12 passes the reinforcing bar hole 10 of steel mould side form 5 and stretches out outside prefabricated plate 1, and all lower floor's main muscle 12 stretches out the end and parallel and level, and upper main muscle 11 is located between the front and back side form 5 of steel mould, and upper main muscle 11 and lower floor's main muscle 12 all match with the shape of steel mould, and be that upper main muscle 11 and lower floor's main muscle 12 constitute by two sections straight sections and middle arc section around, and its arc section radian coincide with 4 arch faces 7 of main mould, as shown in figure 3. The planes of the upper main rib 11 and the lower main rib 12 are vertical planes, that is, the arc sections of the upper main rib 11 and the lower main rib 12 are vertically placed and conform to the shape of the main mold 4. Wear to tie upper main muscle 11 and lower floor's main muscle 12 through stirrup 13, as shown in figure 9, upper main muscle 11 and lower floor's main muscle 12 are located stirrup 13 internal upper and lower position respectively, and stirrup 13 place plane 6 is parallel with side form 5, and stirrup 13 and upper main muscle 11 and lower floor's main muscle 12 vertical cross promptly, and the ligature has the tie-wire between upper main muscle 11 and lower floor's main muscle 12 and the stirrup 13, and the tie-wire is with upper main muscle 11 and lower floor's main muscle 12 rigidity.
Preferably, the upper main reinforcement 11 and the lower main reinforcement 12 are twisted steel.
The manufacturing method of the steel box girder precast slab comprises the following steps:
(1) Manufacturing the positioning frame 14: manufacturing a rectangular frame with supporting legs at four corners, wherein a plurality of pairs of vertical limiting columns 15 are upwards fixed on four sides of the rectangular frame, the distance between each pair of adjacent limiting columns 15 on the wide sides is consistent with the distance between adjacent steel bar holes 10 on a steel mould side mould 5, the positions of the limiting columns 15 on the opposite sides of the rectangular frame correspond to each other, and the limiting columns 15 are used for accurately positioning the positions of an upper-layer main bar 11, a lower-layer main bar 12 and a hoop bar 13 so that each upper-layer main bar 11 and each lower-layer main bar 12 are kept parallel, and the hoop bar 13 is crossed and vertical to the upper-layer main bar 11 and the lower-layer main bar 12, so that the positioning frame 14 is manufactured;
it is preferred here, locating rack 14 adopts the steel bar welding to form, and spacing post 15 adopts the steel bar welding of segmentation at four edges of locating rack 14, for example dumped small segment reinforcing bar, or cuts into a small segment with dumped reinforcing bar, has further practiced thrift the cost.
For more precise restriction, it is preferable that the spacing between the two restraining posts 15 in each pair of restraining posts 15 is 1 to 5cm, preferably 3cm, larger than the diameter of the main bar.
(2) Fixing the lower main reinforcement 12: firstly, respectively placing three lower-layer main reinforcements 12 in limiting columns 15 at two edges of a wide edge of a positioning frame 14 and limiting columns 15 at a middle position, then penetrating and binding stirrups 13 through the three lower-layer main reinforcements 12 perpendicularly, binding two adjacent lower-layer main reinforcements 12 in the same stirrup 13 by the stirrups 13, and crossing the two opposite stirrups 13 at the middle position, as shown in figure 7, placing the stirrups 13 in the limiting columns 15 corresponding to long edges, accurately positioning each stirrup 13 by the limiting columns 15 on the long edges of the positioning frame 14, enabling the front stirrup 13 and the rear stirrup 13 to be parallel to each other and perpendicular to the lower-layer main reinforcements 12, after all the stirrups 13 are bound, then sequentially penetrating the stirrups 13 from the rest limiting columns 15 on the wide edge to place the rest of the lower-layer main reinforcements 12, as shown in figure 8, after the placement of the lower-layer main reinforcements 12 is completed, manually adjusting a plane 6 where each lower-layer main reinforcement 12 is located to enable the lower-layer main reinforcement 12 to be a vertical plane, and primarily binding and fixing through binding wires, so as to ensure that the lower-layer main reinforcements 12 are parallel to be parallel to each other, and that the prefabricated slabs 1 do not cross;
(3) Fixing the upper main rib 11: sequentially penetrating a plurality of upper-layer main reinforcements 11 at the upper positions in the stirrups 13, wherein the upper-layer main reinforcements 11 are positioned above the lower-layer main reinforcements 12 and are parallel to the lower-layer main reinforcements 12, and preliminarily adjusting the upper-layer main reinforcements 11 and binding the upper-layer main reinforcements 11 on the stirrups 13 through binding wires to preliminarily fix the upper-layer main reinforcements;
(4) Fixing a hoisting ring 3: a plurality of lifting rings 3 are inserted and sleeved on the lower-layer main reinforcement 12 and fixed, the plane where the lifting rings 3 are located is parallel to the wide side of the positioning frame 14, the lifting rings 3 are uniformly fixed on the left side and the right side of the reinforcement cage 2, as shown in fig. 6, the top view structural schematic diagram of the reinforcement cage 2 is shown, and the reinforcement cage 2 is manufactured;
(5) The reinforcement cage 2 is combined with a steel mold: placing the reinforcement cage 2 in the steel mould main mould 4, enabling two ends of the upper layer main reinforcement 11 to be positioned in the steel mould main mould 4, enabling the reinforcement holes 10 of the steel mould side mould 5 to respectively penetrate through two ends of the lower layer main reinforcement 12, and then respectively fixing the side mould 5 at the front end and the rear end of the main mould 4 through bolts;
(6) The adjusting bracket 16 adjusts and fixes: the adjusting frame 16 is a rectangular frame, the long side of the vertical adjusting frame 16 is vertically welded with an adjusting column 17 downwards, as shown in the attached drawing 5, the adjusting frame 16 is placed on the stirrup 13, the lower-layer main reinforcement 12 and the upper-layer main reinforcement 11 are further adjusted through the adjusting column 17 of the adjusting frame 16, because the adjusting column 17 is vertically downwards and the adjusting column 17 on one side is in a vertical plane, the plane where each upper-layer main reinforcement 11 and each lower-layer main reinforcement 12 are located is a vertical plane through manual adjustment by taking the adjusting column 17 as a reference, binding wires at the inclined upper-layer main reinforcement 11 or the lower-layer main reinforcement 12 are firstly loosened, and then the binding wires are bound for final fixation after adjustment is completed;
(7) Pouring and forming: and (5) pouring concrete on the steel mould in the step (6) and in the reinforcement cage 2, and forming the precast slab 1 with the same shape as the steel mould, so that the precast slab 1 is manufactured.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; those of ordinary skill in the art will understand that: the technical solutions described in the above embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (4)
1. A manufacturing method of a steel box girder precast slab is characterized by comprising the following steps: the method comprises the following steps:
(1) Manufacturing a positioning frame (14): manufacturing a rectangular frame with supporting legs at four corners, wherein a plurality of pairs of vertical limiting columns (15) are upwards fixed on four sides of the rectangular frame, the limiting columns (15) on the wide sides correspond to the reinforcing steel bar holes (10) on the steel die side die (5) one by one, the limiting columns (15) on the opposite sides of the rectangular frame correspond to each other in position, and the positioning frame (14) is manufactured; the steel mould comprises a main mould (4) and side moulds (5) which are fixed together through bolts, wherein the main mould (4) is integrally arched, two sides of the main mould (4) are provided with planes (6), the middle of the main mould (4) is provided with an arched surface (7), the side moulds (5) are fixed at the front end and the rear end of the main mould (4), each side mould (5) comprises a vertical plate (8) and a side plate (9), and reinforcing steel bar holes (10) are uniformly formed in the vertical plates (8);
(2) Fixing the lower main rib (12): firstly, respectively placing three lower-layer main reinforcements (12) in two edge limiting columns (15) on the wide side of a positioning frame (14) and a limiting column (15) at a middle position, then binding hoops (13) through the three lower-layer main reinforcements (12) vertically, binding two adjacent lower-layer main reinforcements (12) in the same hoops (13), placing the hoops (13) in the limiting columns (15) corresponding to the long side, then sequentially penetrating the hoops (13) from the rest limiting columns (15) on the wide side to place the rest lower-layer main reinforcements (12), manually adjusting the plane of each lower-layer main reinforcement (12) to be a vertical plane after the placement of the lower-layer main reinforcements (12) is completed, and preliminarily binding and fixing the lower-layer main reinforcements (12) through binding wires;
(3) Fixing upper main rib (11): sequentially penetrating a plurality of upper-layer main reinforcements (11) at the inner upper parts of the stirrups (13), wherein the upper-layer main reinforcements (11) are parallel to the lower-layer main reinforcements (12), and binding the upper-layer main reinforcements (11) on the stirrups (13) through binding wires to perform primary fixation; the upper-layer main rib (11) and the lower-layer main rib (12) are matched with the shape of a steel die, and the planes (6) where the upper-layer main rib (11) and the lower-layer main rib (12) are located are vertical planes;
(4) Fixed hoisting ring (3): sleeving a plurality of lifting rings (3) on the lower-layer main rib (12) and fixing, wherein the plane where the lifting rings (3) are located is parallel to the wide side of the positioning frame (14), and the lifting rings (3) are uniformly fixed on the left side and the right side of the reinforcement cage (2), so that the reinforcement cage (2) is manufactured;
(5) The reinforcement cage (2) is combined with a steel mould: placing the reinforcement cage (2) in a steel mould main mould (4), enabling two ends of an upper layer main reinforcement (11) to be positioned in the steel mould main mould (4), enabling reinforcement holes (10) of a steel mould side mould (5) to respectively penetrate through two ends of a lower layer main reinforcement (12), and then respectively fixing the side mould (5) at the front end and the rear end of the main mould (4) through bolts;
(6) The adjusting frame (16) is adjusted and fixed: the adjusting frame (16) is a rectangular frame, adjusting columns (17) are vertically welded downwards to the long sides of the adjusting frame (16), the adjusting frame (16) is placed on the stirrups (13), the lower-layer main reinforcements (12) and the upper-layer main reinforcements (11) are further adjusted through the adjusting frame (16), the plane (6) where each upper-layer main reinforcement (11) and each lower-layer main reinforcement (12) are located is a vertical plane, and then binding wires are tightened to carry out final fixing;
(7) Pouring and forming: and (5) pouring concrete on the steel mould in the step (6) and in the reinforcement cage (2) to form the precast slab (1) with the same shape as the steel mould, and thus finishing the manufacture of the precast slab (1).
2. The method for manufacturing the steel box girder precast slab according to claim 1, wherein: the upper-layer main reinforcement (11) and the lower-layer main reinforcement (12) are both twisted steel bars.
3. The method for manufacturing the steel box girder precast slab according to claim 1, wherein: in the step (1), the positioning frame (14) is formed by welding steel bars, and the limiting columns (15) are welded on four edges of the positioning frame (14) by adopting sectional steel bars.
4. The method for manufacturing the steel box girder precast slab according to claim 1, wherein: in the step (1), the distance between each pair of limiting columns (15) is 1-5cm larger than the diameter of the main rib.
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| CN201710396919.0A CN107119553B (en) | 2017-05-31 | 2017-05-31 | Steel box girder precast slab and manufacturing method thereof |
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| CN201710396919.0A CN107119553B (en) | 2017-05-31 | 2017-05-31 | Steel box girder precast slab and manufacturing method thereof |
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| CN107119553B true CN107119553B (en) | 2023-01-20 |
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| CN87101842A (en) * | 1987-03-14 | 1988-09-28 | 阎石钤 | Greatly (in) comprehensive technology of span assembled integral concrete hollow arched roof |
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| CN107119553A (en) | 2017-09-01 |
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