A laminated slab mold and a laminated slab pouring method using the mold

Abstract

The present invention relates to the field of bridge construction, and particularly relates to a composite slab mold and a method for casting a composite slab using the mold. The mold is characterized by comprising: a bottom mold; side molds, wherein the two sides of the upper surface of the bottom mold are detachably connected with the side molds respectively. The side molds are perpendicular to the bottom mold, and the side molds on both sides of the bottom mold are parallel to each other. The side molds are equidistantly provided with notches, and the notches on the opposite side molds are staggered; a simulation part, which is respectively arranged on the upper surface of the bottom mold, and the simulation part is located in the shear key groove of the composite slab. The beneficial effect of the present invention is that, since sleeves are used to simulate the positions of the shear studs, and the steel bars are adjusted to avoid the sleeves, the problem of conflict when connecting the shear studs on the composite slab and the steel beam is effectively solved, and thus the shear studs can be smoothly inserted into the shear key groove of the composite slab.

Description

Technical Field

[0001] The present invention relates to the field of bridge construction, and particularly relates to a composite slab mold and a composite slab pouring method using the mold. Background Art

[0002] When installing precast bridge deck slabs, it is extremely difficult to match the positions of shear studs on steel plate girders. Moreover, the steel bars inside the shear key grooves and the shear studs interfere with each other, and the exposed circular steel bars are also prone to conflict with each other. Due to the difference in shrinkage characteristics between the underlying ordinary C50 concrete and the top-layer UHPC material, cracking or delamination is likely to occur. Summary of the Invention

[0003] The present invention provides a composite slab mold and a composite slab pouring method using the mold, which solve the problem that the steel bars in the shear key of the prepared composite slab match the positions of the shear studs on the steel plate girder, and also solve the problem of cracking or delamination of the composite slab.

[0004] The technical problems solved by the present invention can be achieved by the following technical solutions:

[0005] A composite slab mold includes:

[0006] A bottom mold;

[0007] Side molds, the two sides of the upper surface of the bottom mold are detachably connected with side molds respectively. The side molds are perpendicular to the bottom mold, and the side molds on both sides of the bottom mold are parallel to each other. The side molds are equidistantly provided with notches, and the notches on the opposite side molds are offset;

[0008] A simulation part, which is respectively arranged on the upper surface of the bottom mold;

[0009] A limiting frame, which is a rectangular frame. The limiting frame is fixed on the bottom mold, and the simulation part is located inside the limiting frame;

[0010] A rectangular vertical plate, which is provided with a vertical groove at the bottom, and the bottom of the rectangular vertical plate is sleeved outside the limiting frame.

[0011] Further, the simulation part includes a plurality of sleeves arranged in a matrix.

[0012] Further, the offset distance between the notches of a pair of the side molds is greater than or equal to the width of the notch.

[0013]

[0014] A composite slab pouring method includes at least the above-mentioned composite slab mold, and further includes the following steps:

[0015] In the first step, steel bars are placed in a criss-cross manner on the mold. The two ends of the longitudinal steel bars are respectively placed in the notches of the two side molds,

[0016] and the longitudinal steel bars are sequentially placed from one end of the side mold, so that the longitudinal steel bars are inclined.​

[0017] In the second step, move the steel bars in the notch so that each sleeve is located between the horizontally and vertically criss-crossed steel bars. Insert the bottom part outside the limit frame above the steel bars, and at the same time, the steel bars are located in the vertical grooves.

[0018] In the third step, pour C50 concrete into the mold. The C50 concrete fills the space between the bottom mold and the side mold and is poured to a height of 10 cm from the top of the side mold.

[0019] After pouring, carry out vibration operation, and then carry out curing of C50 concrete. The curing time is 24h - 48h.

[0020] In the fourth step, pour UHPC on the cured C50 concrete until it reaches the top of the side mold.

[0021] After pouring UHPC, carry out vibration operation, and then carry out curing of UHPC. The curing time is 48h.

[0022] In the fifth step, disassemble the side mold, separate the composite slab and the side mold from the bottom mold, and then remove the side mold and the rectangular vertical plate from the composite slab to complete demolding.

[0023] Furthermore, after the C50 concrete is cured for 6h, the surface of the C50 concrete is chiseled and roughened by a high-pressure water gun.

[0024] The beneficial effects of the present invention are as follows: By using sleeves to simulate the positions of shear studs and adjusting the steel bars to avoid the sleeves, the problem of conflict during the connection of shear studs between the composite slab and the steel beam is effectively solved, and thus the shear studs can be smoothly inserted into the shear slots of the composite slab.

[0025] Due to the use of misaligned notches, the two ends of the steel bars are not on the same horizontal line, effectively solving the problem of conflict of the exposed circular steel bars during the butt joint between composite slabs, and thus realizing the smooth butt joint of composite slabs. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The present invention will be further described below in conjunction with the drawings and embodiments.

[0027] Figure 1 It is a schematic structural diagram of the present invention.

[0028] Figure 2 It is a schematic diagram of notch misalignment of the present invention.

[0029] Figure 3 It is a schematic structural diagram of the rectangular vertical plate of the present invention

[0030] In the figure: 1 - bottom mold; 2 - side mold; 3 - sleeve; 4 - notch; 5 - limit frame; 6 - rectangular vertical plate. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0031] Example 1:

[0032] Referring to Figures 1-3 , which is a schematic structural diagram of Embodiment 1 of the present invention. A laminated plate mold includes:

[0033] Bottom mold 1;

[0034] Side molds 2, the two sides of the upper surface of the bottom mold 1 are respectively detachably connected with side molds 2. The side molds 2 are perpendicular to the bottom mold 1, and the side molds 2 on both sides of the bottom mold 1 are parallel to each other. The side molds 2 are equally spaced with notches 4, and the notches 4 on the opposite side molds 2 are offset;

[0035] Simulation part, which is respectively arranged on the upper surface of the bottom mold 1;

[0036] Limit frame 5, the limit frame 5 is a rectangular frame, the limit frame 5 is fixed on the bottom mold 1, and the simulation part is located inside the limit frame 5;

[0037] Rectangular vertical plate 6, the bottom of the rectangular vertical plate 6 is provided with a vertical groove, and the bottom of the rectangular vertical plate 6 is sleeved outside the limit frame 5.

[0038] During actual use: Reinforcing bars are placed horizontally and vertically on the mold. The two ends of the longitudinal reinforcing bars are respectively placed in the notches 4 of the two side molds 2, and the longitudinal reinforcing bars are sequentially placed from one end of the side mold 2. Through the offset notches 4, the exposed circular reinforcing bars at both ends of the reinforcing bars are located outside the side mold 2, and the two ends of the reinforcing bars are not on the same horizontal line. Due to the gap between the notch 4 and the reinforcing bar, move the reinforcing bar in the notch 4, and adjust the position of the reinforcing bar located in the simulation part through the gap between the reinforcing bar and the notch 4. Insert the rectangular vertical plate 6 on the reinforcing bar, the reinforcing bar is located in the vertical groove, and the bottom of the rectangular vertical plate 6 is sleeved outside the limit frame 5, so that when pouring concrete, the concrete will not flow into the limit frame 5, and at the same time, it restricts the bottom deformation of the rectangular vertical plate 6 under the extrusion of the concrete, so that the simulation part is located in the shear groove of the cast laminated plate, and then pouring can be carried out.

[0039] Since the exposed circular reinforcing bars are not on the same horizontal line, when two laminated plates are butt-jointed through the exposed circular reinforcing bars, no conflict will occur.

[0040] Embodiment 2:

[0041] Referring to Figure 1 , the difference of this embodiment is that: the simulation part includes a plurality of sleeves 3 arranged in a matrix.

[0042] During actual use: According to the positions and spacings of the shear studs on the known steel beam, simulate through the sleeves 3, weld the sleeves 3 at the same positions on the bottom mold 1, adjust the reinforcing bars so that the reinforcing bars are located between the sleeves 3, and at the same time, the upper part of the sleeve 3 does not cross with the reinforcing bars. The shear groove of the cast laminated plate can be accurately placed in the shear studs on the steel beam, so that the shear studs will not conflict with the reinforcing bars.

[0043] In this embodiment, the outer diameter of the casing 3 is greater than or equal to the outer diameter of the shear studs. Meanwhile, the casing 3 can be replaced by other objects, such as steel bars and bolts.

[0044] In this embodiment, the casing 3 is higher than the height of the limit frame 5.

[0045] Embodiment 3:

[0046] Refer to Figure 2 In this embodiment, the difference lies in that the dislocation distance between the notches 4 of a pair of the side molds 2 is greater than or equal to the diameter of the laminated slab steel bars.

[0047] During actual use: by being greater than or equal to the diameter of the laminated slab steel bars, there will be no conflict when two laminated slabs are butted, and the exposed circular steel bars are staggered and butted together.

[0048] Embodiment 4:

[0049] Refer to Figures 1-3 : A method for pouring a laminated slab, which at least includes one of the above-mentioned laminated slab molds, and further includes the following steps:

[0050] The first step is to place steel bars crosswise and longitudinally on the mold. The two ends of the longitudinal steel bars are respectively placed in the notches 4 of the two side molds 2, and the longitudinal steel bars are sequentially placed from one end of the side mold 2, making the longitudinal steel bars inclined.

[0051] The second step is to move the steel bars in the notches 4 so that each casing 3 is located between the crosswise and longitudinally arranged steel bars. Insert a rectangular vertical plate 6 above the steel bars, so that the bottom of the rectangular vertical plate 6 is sleeved outside the limit frame 5, and at the same time the steel bars are located in the vertical grooves.

[0052] The third step is to pour C50 concrete into the mold. The C50 concrete is filled between the bottom mold 1 and the side mold 2 and poured to a height of 10 cm from the top end of the side mold 2.

[0053] After pouring, perform a vibrating operation, and then perform curing on the C50 concrete. The curing time is 24h - 48h.

[0054] The fourth step is to pour UHPC on the cured C50 concrete until it reaches the top end of the side mold 2.

[0055] After pouring UHPC, perform a vibrating operation, and then perform curing on the UHPC. The curing time is 48h.

[0056] The fifth step is to disassemble the side mold 2, separate the laminated slab and the side mold 2 from the bottom mold 1, and then remove the side mold 2 and the rectangular vertical plate 6 from the laminated slab to complete demolding.

[0057] Embodiment 5:

[0058] Compared with Example 6, the difference in this example is that after the C50 concrete is cured for 6 hours, the surface of the C50 concrete is roughened by flushing with a high-pressure water gun.

[0059] In actual use: By roughening, the contact surface between UHPC and C50 can be increased, and they can be fused and fastened.

[0060] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those of ordinary skill in the art, various changes can be made without departing from the gist of the present invention, and they are all within the protection scope of this technology.

Claims

1. A laminated plate mold, characterized in that, Comprising: Bottom mold (1); Side molds (2), the two sides of the upper surface of the bottom mold (1) are detachably connected to the side molds (2) respectively. The side molds (2) are perpendicular to the bottom mold (1), and the side molds (2) on both sides of the bottom mold (1) are parallel to each other. The side molds (2) are equidistantly provided with notches (4), and the notches (4) on the opposite side molds (2) are staggered; Simulation part, the simulation part includes a number of sleeves (3) arranged in a matrix. The sleeves (3) are used to simulate the positions of shear studs and are located in the shear grooves of the composite slab, and the simulation part is respectively arranged on the upper surface of the bottom mold (1); Limit frame (5), the limit frame (5) is a rectangular frame. The limit frame (5) is fixed on the bottom mold (1), and the simulation part is located inside the limit frame (5); Rectangular vertical plate (6), the bottom of the rectangular vertical plate (6) is provided with a vertical groove, and the bottom of the rectangular vertical plate (6) is sleeved outside the limit frame (5).

2. The laminated plate mold according to claim 1, wherein The dislocation distance of the notches (4) of a pair of the side molds (2) is greater than or equal to the width of the notch (4).

3. A method for casting a laminated slab, at least including a laminated slab mold according to any one of claims 1-2, characterized in that, It also includes the following steps: The first step, place the steel bars horizontally and vertically on the mold. The two ends of the longitudinal steel bars are respectively placed in the notches (4) of the two side molds (2), and the longitudinal steel bars are sequentially placed from one end of the side mold (2) in sequence, so that the longitudinal steel bars are inclined; The second step, move the steel bars in the notches (4) so that each sleeve (3) is located between the horizontally and vertically staggered steel bars. Insert the rectangular vertical plate (6) above the steel bars, so that the bottom of the rectangular vertical plate (6) is sleeved outside the limit frame (5), and at the same time the steel bars are located in the vertical grooves; The third step, pour C50 concrete into the mold. The C50 concrete is filled between the bottom mold (1) and the side molds (2), and is poured to a position 10 cm away from the top of the side molds (2); After pouring, carry out vibration operation, and then carry out curing of C50 concrete. The curing time is 24h - 48h; The fourth step, pour UHPC on the cured C50 concrete until it reaches the top of the side molds (2); After pouring UHPC, carry out vibration operation, and then carry out curing of UHPC. The curing time is 48h; The fifth step, disassemble the side molds (2), separate the composite slab and the side molds (2) from the bottom mold (1), and then remove the side molds (2) and the rectangular vertical plate (6) from the composite slab to complete demolding.

4. A method for casting a laminated slab according to claim 3, characterized in that: After the C50 concrete is cured for 6h, the surface of the C50 concrete is chiseled and roughened by a high-pressure water gun.

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