A mold system of a UHPC short rib bridge deck precast slab

Abstract

The utility model relates to a kind of mould systems of UHPC short rib bridge deck prefabricated slab, and it belongs to a kind of prefabricated slab mould.It mainly solves the technical problems such as low strength of existing bridge deck prefabricated slab, construction is complex, etc.Its technical scheme key points are as follows: mould includes bottom die (31), vertical mould (32) and groove mould (33), the convex surface is equipped on the groove mould (33) and the cross section of convex surface is trapezoidal, two two convex surfaces are combined to form rib bottom groove, the width of groove mould (33) upper end is less than the width of groove mould (33) lower end, bottom die (31) periphery connects vertical mould (32) and forms mould groove, groove mould (33) is not connected with vertical mould (32) in the mould groove and keeps relative distance with vertical mould (32), and the height of groove mould (33) upper end is lower than the height of vertical mould (32).It is mainly applied to the prefabrication process of bridge deck prefabricated slab.

Description

TECHNICAL FIELD

[0001] The application relates to a mold for prefabricated plates, in particular a mold system for UHPC short-rib bridge deck prefabricated plates. BACKGROUND

[0002] The bridge deck plate directly bears the vehicle load and environmental action, and is the most directly affected component by adverse factors such as overload, corrosion and fatigue, so its working state will directly affect the durability and driving comfort of the main structure of the bridge. The orthotropic steel bridge deck plate and the ordinary concrete bridge deck plate are two main forms of bridge deck plates currently applied in bridge engineering. The ordinary concrete bridge deck plate can better adapt to asphalt concrete bridge pavement or cement pavement, and the driving effect is better, but due to the low tensile strength of the ordinary concrete, the plate thickness is large, the structure self-weight is large, and it is difficult to adapt to the demand of large-span bridges, and it is easy to crack near the wet joint, negative bending moment area and cable anchorage area. The orthotropic steel bridge deck plate has the advantages of light self-weight, large ultimate bearing capacity and short construction period, and is widely used in large-span bridges, but due to the low stiffness of the steel bridge deck plate, the poor adhesion and deformation coordination of the asphalt concrete, and other reasons, the orthotropic steel bridge deck plate used for many years is prone to fatigue cracking and pavement damage.

[0003] The ultra-high performance concrete (i.e. UHPC) has the advantages of high elastic modulus, high compressive and tensile strength and good creep characteristics, can reduce the structure size, reduce the structure self-weight, improve the load resistance effectiveness of the structure and increase the spanning capacity. Therefore, the ultra-high performance concrete bridge deck plate developed based on the performance of the ultra-high performance concrete can avoid the problems of fatigue cracking of the orthotropic steel bridge deck plate and easy damage of the pavement, can reduce the structure self-weight, adapt to the demand of large-span bridges, and the ultra-high performance concrete with excellent tensile performance can solve the problem of easy cracking of the ordinary concrete bridge deck plate and has good durability. SUMMARY

[0004] The purpose of the application is to provide a mold system for UHPC short-rib bridge deck prefabricated plates which is fast and has high efficiency of finished products.

[0005] The technical scheme adopted by the application to solve the technical problems is that the mold comprises a bottom mold 31, a vertical mold 32 and a groove mold 33, the groove mold 33 is provided with convex surfaces, the cross section of the convex surface is trapezoidal, two convex surfaces are combined to form a rib bottom groove, the width of the upper end of the groove mold 33 is smaller than the width of the lower end of the groove mold 33, the bottom mold 31 is connected with the vertical mold 32 around to form a mold groove, the groove mold 33 is not connected with the vertical mold 32 in the mold groove and maintains a relative distance with the vertical mold 32, and the height of the upper end of the groove mold 33 is lower than the height of the vertical mold 32.

[0006] The edge of the bottom die 31 is a convex bottom die convex edge 312, and the side of the vertical die 32 close to the bottom die 31 is provided with a groove matched with the edge of the bottom die 31, i.e. the bottom die convex edge 312, so that the bottom die 31 is sealed with the vertical die 32 around, thereby ensuring that the bottom die 31 is relatively fixed with the vertical die 32 more firmly, the installation size is more accurate, the installation is more convenient, and the mutual sealing is more convenient.

[0007] The bottom die 31 further comprises a bottom die connecting plate 313 arranged at the end face close to the bottom die convex edge 312, and the vertical die 32 is fastened with the bottom die connecting plate 313 after being matched with the outer edge of the bottom die 31, i.e. the bottom die convex edge 312, through the groove.

[0008] The bottom die 31 is provided with the bottom die convex edge 312 around, and the width of the bottom die convex edge 312 is 0.1mm-500mm.

[0009] The mold system further comprises a demolding system, which comprises a groove die 33, one or more rib bottom plates 37, UHPC concrete 336 and a compressed air supply system. The groove die 33 comprises a trapezoidal cross section composed of a groove bottom surface 332, a groove inclined surface 334 and a groove top surface 333, i.e. the cross section composed of the groove bottom surface 332, the groove inclined surface 334 and the groove top surface 333 is trapezoidal, the groove bottom surface 332, the groove inclined surface 334 and the groove top surface 333 form a trapezoidal surface, the trapezoidal surface can comprise two groove bottom surfaces 332, two groove inclined surfaces 334 and one groove top surface 333, two or more trapezoidal cross sections form the groove die 33, the groove bottom surface 332 is provided with an air groove 331 and an air hole 335 and can be connected to the compressed air through the air hole 335, the rib bottom plate 37 is symmetrically arranged and covers the groove bottom surface 332, the length of the rib bottom plate 37 is less than the length of the groove bottom surface 332 of the groove die 33, the length of the rib bottom plate 37 is greater than the length of the air groove 331 of the groove die 33, the width of the rib bottom plate 37 is greater than the width of the air groove 331 of the groove die 33, after the prefabricated UHPC concrete 336 is poured, the pneumatic cavity is formed by the groove bottom surface 332, the rib bottom plate 37 and the UHPC concrete 336 at both ends of the length direction of the rib bottom plate 37, after the prefabricated UHPC concrete reaches the strength, the rib bottom plate 37 is supported by the compressed air supplied through the air hole 335, and after the adhesive layer between the groove inclined surface 334 and the groove top surface 333 and the UHPC concrete is damaged, the UHPC prefabricated plate is separated from the groove die 33.

[0010] The length of the air groove 331 provided in the groove bottom surface 332 of the groove die 33 is 10mm-100mm less than the length of the groove bottom surface 332 of the groove die 33, the groove depth of the air groove 331 is 0.1mm-5.0mm, and the groove width is 0.5mm-5.0mm.

[0011] The length of the rib bottom plate 37 is 5mm-100mm less than the length of the groove bottom surface 332 of the groove die 33.

[0012] The compressed air supply system of the application comprises a system compressed air connection pipeline, a supply total valve 337, and a connection air pipe of all air holes 335 of the monolithic UHPC prefabricated slab, which is connected in parallel to the outlet pipe of the supply total valve 337.

[0013] The demolding system of the application can further comprise a mold and a rib bottom plate 37, wherein the mold comprises a groove mold 33, the groove mold 33 is provided with convex surfaces, the cross section of the convex surfaces is trapezoidal, and two convex surfaces combine to form a rib bottom groove, the rib bottom groove is provided with a gas groove 331 and can be connected to gas, and the rib bottom plate 37 is placed and covers the slotted surface of the gas groove 331, so that the rib bottom plate 37 and the gas groove 331 form a pneumatic cavity.

[0014] The rib bottom groove of the application is provided with a gas groove 331 and can be connected to gas, and the rib bottom plate 37 is placed and covers the slotted surface of the gas groove 331, so that the rib bottom plate 37 and the gas groove 331 form a pneumatic cavity.

[0015] The mold of the application comprises a transverse mold I 321, a vertical mold I 322, a transverse mold II 323 and a vertical mold II 324 connected in cooperation, the transverse mold I 321, the transverse mold II 323, the vertical mold I 322 and the vertical mold II 324 are respectively provided with grooves matched with the outer edge of the bottom mold convex edge 312 of the bottom mold 31, and the grooves of the transverse mold I 321, the transverse mold II 323, the vertical mold I 322 and the vertical mold II 324 are respectively matched and installed on the outer edge of the bottom mold convex edge 312 of the bottom mold 31.

[0016] The end surface outer edge of the vertical mold I 322 close to the transverse mold I 321 and the transverse mold II 323 is a vertical mold I convex edge 3221 in the form of a convex strip, the end surface outer edge of the vertical mold II 324 close to the transverse mold I 321 and the transverse mold II 323 is a vertical mold II convex edge 3241 in the form of a convex strip, one end of the inner side of the transverse mold I 321 is provided with a groove matched with the outer edge of the vertical mold I convex edge 3221 of the vertical mold I 322, and the other end is provided with a groove matched with the outer edge of the vertical mold II convex edge 3241 of the vertical mold II 324; one end of the inner side of the transverse mold II 323 is provided with a groove matched with the outer edge of the vertical mold I convex edge 3221 of the vertical mold I 322, and the other end is provided with a groove matched with the outer edge of the vertical mold II convex edge 3241 of the vertical mold II 324.

[0017] The mold of the present application further comprises a mold support 35, and the bottom mold 31 is installed in a plane on the upper portion of the mold support 35; the mold support 35 comprises a rib-parallel steel 351, a cantilever support steel 352, a steel connecting plate 353, and a mold support leg; the rib-parallel steel 351 is arranged below the bottom mold 31, the steel connecting plate 353 is arranged on the mold support leg, the steel connecting plate 353 is connected with the rib-parallel steel 351 through the cantilever support steel 352, the rib-parallel steel 351 is erected on two corresponding cantilever support steels 352, and the mold support leg is consolidated with the ground; the rib-parallel steel 351, the cantilever support steel 352, and the mold support leg form a door-shaped framework.

[0018] The mold of the present application comprises a mold support 35; the bottom mold 31 comprises a steel plate and a bottom plate connecting plate, and the bottom mold 31 is connected with the mold support 35 through the steel plate.

[0019] The position range of the cantilever support steel 352 of the present application arranged on the steel connecting plate 353 is between the central vertical line of the mold support leg and the central vertical line of the steel connecting plate 353.

[0020] The vertical mold 32 of the present application further comprises a box slot mold, and the box slot mold comprises a box bottom plate, a box front vertical plate, a box rear vertical plate, and a box side vertical plate; one side of the box front vertical plate is provided with a sealing structure; the box rear vertical plate is provided with a through hole corresponding to the position of the steel bar and a screw hole for connecting and fixing.

[0021] The vertical mold 32 of the present application further comprises a rubber slot mold 341, and the rubber slot mold 341 comprises a rubber pressing plate 3411 and a supporting box frame 3412; the supporting box frame 3412 is arranged above the rubber pressing plate 3411 and connected with the vertical mold 32, the rubber pressing plate 3411 is provided with an arch-shaped long slot hole, and the arch-shaped long slot hole comprises a semicircular slot 34111 and a rectangular slot 34112; the semicircular slot 34111 and the rectangular slot 34112 can form an arch-shaped long slot hole.

[0022] The supporting box frame 3412 of the present application is arranged above the rubber pressing plate 3411 and connected with the vertical mold I 322 and the vertical mold II 324.

[0023] The upper surface of the rectangular slot 34112 of the present application is flush with the diameter center line of the semicircular slot 34111.

[0024] The bottom mold 31 of the present application is provided with a bottom mold convex edge 312 around, and the width of the bottom mold convex edge 312 is 2.0mm-20.0mm.

[0025] The rubber slot mold 341 of the present application is installed on the inner side of the upper portion of the vertical mold I 322 and the vertical mold II 324.

[0026] The present application installs the bottom groove mould on the mould, so as to produce the UHPC prefabricated bridge deck slab with grooves.

[0027] The bottom mould 31 of the present application is longitudinally sealedly fitted with the vertical mould 32, the outer edge of the bottom mould 31 is provided with a convex strip-shaped bottom mould convex edge, and the inner side of the vertical mould 32 is provided with a groove matched with the bottom mould convex edge of the outer edge of the bottom mould 31, so that the relative fixation of the bottom mould 31 and the vertical mould 32 is more reliable, the installation size is more accurate, the installation is more convenient, and the mutual sealing is more convenient.

[0028] The bottom mould 31 of the present application further comprises a bottom mould connecting plate arranged at the end face close to the bottom mould convex edge, and the vertical mould 32 is fastened and connected with the bottom mould connecting plate after being matched with the convex strip-shaped bottom mould convex edge of the outer edge of the bottom mould 31 through the groove.

[0029] The vertical mould 32 of the present application comprises a horizontal vertical mould I, a vertical vertical mould I, a horizontal vertical mould II and a vertical vertical mould II connected in a matched manner, the horizontal vertical mould I, the horizontal vertical mould II, the vertical vertical mould I and the vertical vertical mould II are respectively provided with a groove matched with the bottom mould convex edge of the outer edge of the bottom mould 31, and the grooves of the horizontal vertical mould I, the horizontal vertical mould II, the vertical vertical mould I and the vertical vertical mould II are respectively fitted on the bottom mould convex edge of the outer edge of the bottom mould 31.

[0030] The end face outer edge of the vertical vertical mould I close to the horizontal vertical mould I and the horizontal vertical mould II is a convex strip-shaped vertical vertical mould I convex edge, the end face outer edge of the vertical vertical mould II close to the horizontal vertical mould I and the horizontal vertical mould II is a convex strip-shaped vertical vertical mould II convex edge, one end of the inner side of the horizontal vertical mould I is provided with a groove matched with the vertical vertical mould I convex edge of the outer edge of the vertical vertical mould I, and the other end is provided with a groove matched with the vertical vertical mould II convex edge of the outer edge of the vertical vertical mould II; one end of the inner side of the horizontal vertical mould II is provided with a groove matched with the vertical vertical mould I convex edge of the outer edge of the vertical vertical mould I, and the other end is provided with a groove matched with the vertical vertical mould II convex edge of the outer edge of the vertical vertical mould II.

[0031] The outer edge of the bottom mould 31 of the present application is provided with a bottom mould convex edge, and the width of the bottom mould convex edge is 2.0mm-20.0mm.

[0032] The vertical formwork I and the vertical formwork II of the present application are respectively provided with a vertical horizontal groove I and a vertical horizontal groove II at the lower end of one side; the lateral formwork I and the lateral formwork II are respectively provided with two vertical grooves at the two ends of one side; the lateral vertical groove I and the lateral vertical groove II, and the lateral formwork I and the lateral formwork II are respectively provided with a lateral horizontal groove I and a lateral horizontal groove II at the lower end; the vertical horizontal groove I, the vertical horizontal groove II, the lateral horizontal groove I and the lateral horizontal groove II of the lateral formwork I, the vertical formwork I, the lateral formwork II and the vertical formwork II are respectively gap inlaid installed with the bottom die flange around the bottom die 31, and the inlaid fitting gap range is 0.5mm-20.0mm; the vertical formwork I flange and the vertical formwork II flange at the two ends of the vertical formwork I and the vertical formwork II are respectively embedded in the lateral vertical groove I and the lateral vertical groove II of the lateral formwork I and the lateral formwork II, and the embedded groove depth is 2.0mm-20mm.

[0033] The upper surface of the bottom die flange around the bottom die 31 of the present application is closely installed with the upper groove surface of the vertical horizontal groove I and the vertical horizontal groove II to ensure the vertical positioning of the formwork, and the lower end side of the lateral formwork I, the vertical formwork I, the lateral formwork II and the vertical formwork II is closely installed with the vertical plane of the bottom die connecting plate of the bottom die 1 and is connected by bolt fastening.

[0034] The convex surface on the groove die 33 of the present application, the width of the upper end surface of the convex surface is less than the width of the lower end of the convex surface.

[0035] The vertical formwork I 322 and the vertical formwork II 324 of the present application are provided with a horizontal groove I at the lower end of one side; the lateral formwork I 321 and the lateral formwork II 323 are respectively provided with a vertical groove at the two ends of one side, and a horizontal groove II at the lower end; the horizontal groove I and the horizontal groove II of the lateral formwork I 321, the vertical formwork I 322, the lateral formwork II 323 and the vertical formwork II 324 are respectively gap inlaid installed with the bottom plate flange around the bottom die 31, and the inlaid fitting gap range is 0.1mm-200mm; the two ends of the vertical formwork I 322 and the vertical formwork II 324 are respectively embedded in the vertical groove of the lateral formwork I 321 and the lateral formwork II 323, and the embedded groove depth is 0.1mm-200mm.

[0036] The upper surface of the bottom plate flange around the bottom die 31 of the present application is closely installed with the upper groove surface of the horizontal groove I and the horizontal groove II to ensure the vertical positioning of the formwork, and the lower end side of the lateral formwork I 321, the vertical formwork I 322, the lateral formwork II 323 and the vertical formwork II 324 is closely installed with the vertical plane of the bottom plate connecting plate of the bottom die 31 and is connected by bolt fastening.

[0037] The mold support 35 of the present application is composed of a ribbed steel 351, a cantilever support steel 352, a steel connecting plate 353 and a mold support foot.

[0038] The present application is provided with a through hole on the bottom mold 31, the plate bottom groove mold is installed upward from the through hole on the bottom mold 31 below the bottom mold 31 and fixed on the bottom mold 31, so that the UHPC prefabricated bridge deck slab with grooves can be poured, and the disassembly and assembly are very convenient.

[0039] The present application installs the box groove mold in the mold to form the connecting structure required by design on the bridge deck slab of pouring shape.

[0040] The vertical mold 32 of the present application includes a box groove mold including a box bottom plate, a box front vertical plate, a box rear vertical plate and a box side vertical plate; the box front vertical plate is provided with a sealing structure on one side; the box rear vertical plate is provided with a through hole corresponding to the position of the steel bar and a screw hole for connecting and fixing.

[0041] The box groove mold of the present application is installed on the upper part of the horizontal vertical mold I 321 and the horizontal vertical mold II 323.

[0042] The rubber groove mold 341 of the present application is installed on the inner side upper part of the vertical mold I 322 and the vertical mold II 324.

[0043] The present application installs the plate bottom groove mold on the mold, so as to produce the UHPC prefabricated bridge deck slab with grooves.

[0044] The present application is that the spreading degree of the UHPC concrete mixing material to be poured reaches 580-720mm.

[0045] The bottom mold 31 of the present application further includes a steel flat plate and a hole steel plate; the width of the steel flat plate of the bottom mold 31 is greater than the width of the rib bottom steel plate by 0.1-60mm.

[0046] The demolding system of the present application further includes a high-pressure pneumatic system connection, the bottom of the air groove 331 is provided with a vent hole 335, the diameter of the vent hole 3-1 is 0.1-100mm, and the air groove 331 is connected with the high-pressure pneumatic system through the vent hole 335.

[0047] The air groove 331 of the present application is arranged at the middle position in the width direction of the rib bottom groove and extends to both ends of the rib bottom groove in the length direction. The length of the air groove 331 is less than the length of the rib bottom groove by 0.1-2000mm, the groove depth of the air groove 331 is 0.1-50mm, and the groove width is 0.1-50mm.

[0048] The high-pressure pneumatic system of the present application comprises an air compressor, an air tank, valves and air pressure pipelines, etc.

[0049] The air groove 331 of the present application is arranged at the middle position between the two groove molds 33.

[0050] The air groove 331 of the present application can also be arranged at the middle position of the rib bottom groove.

[0051] The length of the air groove 331 of the present application is close to or slightly smaller than the length of the rib bottom plate 37.

[0052] The width of the air groove 331 of the present application is close to or slightly smaller than the width of the rib bottom plate 37.

[0053] In the production process of the present application, first, the rib bottom steel plate is placed between the groove molds or in the rib bottom groove, then the mold is poured, and the poured material covers the rib bottom plate, and the precast plate, the rib bottom plate and the air groove formed by pouring form a sealed pneumatic chamber. By inflating the air groove, the air pressure in the air groove exerts uniform air pressure on the rib bottom plate. When the gas in the air groove pushes the rib bottom plate up, the rib bottom plate on both sides of the precast plate is also separated from the rib bottom groove on both sides at the same time. At this time, the gas in the air groove will flow out from both ends of the air groove and inflate upwards along the rib bottom groove on both sides, so that the gas acts on the other parts of the precast plate without the air groove, and the other parts of the precast plate without the air groove cannot be demolded to cause damage to the precast plate, achieving the effect of one-time demolding.

[0054] The rib bottom plate of the present application can be longitudinal ribs, or horizontal ribs, or both horizontal ribs and longitudinal ribs; the upper end of the rib bottom plate is provided with a shear key;

[0055] The length of the rib bottom plate of the present application is 1mm-900mm, preferably 5mm-300mm, smaller than the length of the groove mold;

[0056] The width of the rib bottom plate of the present application is 0.01mm-100mm, preferably 0.5mm-10mm, smaller than the width between the two groove molds;

[0057] The length of the air groove of the present application is 0.01mm-600mm, preferably 1mm-200mm, smaller than the length of the rib bottom plate;

[0058] The depth of the air groove of the present application is 0.01mm-20mm, preferably 0.1mm-5mm; the width of the air groove is 0.1mm-10mm, preferably 0.5mm-5mm;

[0059] The air vent hole 335 of the present application is arranged on both sides of the air groove, one end of which is connected with the air groove, and the other end is connected with the high-pressure pneumatic system; the diameter of the air vent hole 335 is 0.1mm-10mm, preferably 0.5mm-5mm;

[0060] The high-pressure pneumatic system of the present invention includes an air compressor, an air tank, valves, and a pneumatic delivery pipeline; the high-pressure pneumatic system can provide an air medium with a pressure of 0.5 MPa to 1 MPa.

[0061] The present invention may further include a steel bottom mold, a UHPC precast slab rib bottom steel plate, a sealing combination ring disposed around the steel bottom mold and the UHPC precast slab rib bottom steel plate, a pneumatic cavity, and a compressed air connector; the steel bottom mold is tightly installed with the UHPC precast slab rib bottom steel plate; the sealing combination ring includes a sealing strip, which is disposed around the perimeter of the steel bottom mold and extends upward to form a groove that can accommodate the UHPC precast slab rib bottom steel plate; the steel bottom mold is provided with vent holes, air grooves, and ventilation channels, the air grooves are disposed in the middle of the steel bottom mold and extend to both ends of the steel bottom mold, the vent holes are disposed on both sides of the air grooves, the vent holes are connected to the air grooves through the ventilation channels, and the pneumatic cavity is formed by the combination of the bottom mold, the UHPC precast slab rib bottom steel plate, the sealing combination ring, and the air grooves.

[0062] The steel bottom mold of the present invention includes a long strip shape, the length of which is 5mm to 300mm longer than the length of the bottom steel plate of the UHPC precast slab rib; the width of the steel bottom mold is 0.5mm to 10.0mm wider than the width of the bottom steel plate of the rib.

[0063] The air groove on the upper surface of the steel bottom mold of the present invention has a length that is 1mm to 200mm shorter than the length of the bottom steel plate of the rib. The depth of the air groove is 0.1mm to 5.0mm and the width of the groove is 0.5mm to 5.0mm.

[0064] In this invention, one end of the vent is connected to the air groove via a vent groove, and the other end is connected to a compressed air connector; the diameter of the vent is 5-10 mm.

[0065] The pneumatic demolding method of the present invention is as follows: Using the above-mentioned demolding structure, when the concrete of the UHPC precast slab reaches the design strength or the strength allowed for demolding, a pneumatic cavity is formed. At this time, the vertical templates that constrain demolding around the precast slab are first removed, and the compressed air connector is connected to the compressed pneumatic source. High-pressure air is introduced into the pneumatic cavity through the vent and air groove. The thrust generated in the pneumatic cavity lifts the bottom steel plate of the UHPC precast slab and pushes the UHPC precast slab upward as a whole, while causing the steel bottom mold to tend to move downward, so that the precast slab is separated from the steel bottom mold by 10.02-1.2mm. At this time, the sealing combination ring around the pneumatic cavity has been destroyed, and the compressed air overflows from the contact surface between the steel template and the UHPC precast slab, thus losing or weakening the lifting power. At the same time, the UHPC precast slab moves downward due to gravity and is supported by the steel template again. At this time, the demolding process is completed.

[0066] Assembly process of the present invention:

[0067] Step S1: horizontally place the bottom mold on the mold frame, and assemble the adjacent horizontal vertical mold I, vertical vertical mold I and bottom mold together;

[0068] Step S2: assemble the horizontal vertical mold II and the bottom mold together, insert the horizontal steel bars, then assemble the vertical vertical mold II, box slot mold and bottom mold together, and insert the vertical steel bars;

[0069] Step S3: place the prepared steel mesh on the horizontal vertical mold I, vertical vertical mold I, horizontal vertical mold II and vertical vertical mold II upper end;

[0070] Step S4: place the rubber slot mold inside the vertical vertical mold I and vertical vertical mold II.

[0071] The beneficial effects of the present application are: the bridge deck slab manufacturing efficiency is high, the best separation time of the bridge deck slab and the mold can be accurately controlled, the structure of the bridge deck slab is not damaged; not affected by the severe cold or hot weather or the rainy environment, can be directly produced in the factory, and directly installed to the construction site. It is mainly applied to the bridge deck precast slab process. BRIEF DESCRIPTION OF DRAWINGS

[0072] Figure 1 is a structural schematic diagram of the present application.

[0073] Figure 2 is a structural schematic diagram of the present application;

[0074] Figure 3 is a partial sectional view of the present application;

[0075] Figure 4 is a top view of the present application;

[0076] Figure 5 is a partial schematic diagram of the present application;

[0077] Figure 6 is a vertical vertical mold I schematic diagram of the present application;

[0078] Figure 7 is a vertical vertical mold II schematic diagram of the present application;

[0079] Figure 8 is a horizontal vertical mold I schematic diagram of the present application;

[0080] Figure 9 is a horizontal vertical mold II schematic diagram of the present application;

[0081] Figure 10 is a structural schematic diagram of the present application on the mold;

[0082] Figure 11 is a structural schematic diagram of the present application on the mold;

[0083] Figure 12 is a structural schematic diagram of the present application;

[0084] Figure 13 is a structural schematic diagram of the present application;

[0085] Figure 14 is a structural schematic diagram of the present application on a mold;

[0086] Figure 15 is a structural schematic diagram of the present application on a mold;

[0087] Figure 16 is a structural schematic diagram of the present application on a mold;

[0088] Figure 17 is a structural schematic diagram of the present application on a mold;

[0089] Figure 18 is a structural schematic diagram of the present application on a mold;

[0090] Figure 19 is a structural schematic diagram of the present application on a mold;

[0091] Figure 20 is a structural schematic diagram of the present application on a mold;

[0092] Figure 21 is a structural schematic diagram of the present application on a mold;

[0093] Figure 22 is a structural schematic diagram of the present application on a mold;

[0094] Figure 23 is a structural schematic diagram of the present application on a mold;

[0095] Figure 24 is a structural schematic diagram of the present application on a mold;

[0096] Figure 25 is a structural schematic diagram of the present application on a mold;

[0097] Figure 26 is a structural schematic diagram of the present application on a mold;

[0098] Figure 27 is a structural schematic diagram of the present application on a mold;

[0099] Figure 28 is a structural schematic diagram of the present application on a mold; DETAILED DESCRIPTION

[0100] The present application will be further described in detail below in conjunction with the accompanying drawings and examples.

[0101] Example 1, see Figures 1 to 17The application comprises a bottom mold, a vertical mold, a rubber groove mold, a box groove mold, a plate bottom groove mold, a mold support, an external reinforcement paste sealing system, an attached vibration system and a pneumatic demolding system; the bottom mold is fixed on the mold support, and vertical molds are vertically installed around the bottom mold; the vertical molds comprise horizontal vertical mold I 321, vertical mold I 322, horizontal vertical mold II 323 and vertical mold II 324, and the lower sides of the vertical molds are fixedly connected to the bottom mold by bolts; the upper parts of the horizontal vertical mold I 321 and the horizontal vertical mold II 323 are provided with the box groove mold, and the upper parts of the vertical mold I 322 and the vertical mold II 324 are provided with the rubber groove mold 341; the external reinforcement paste sealing system comprises an external reinforcement paste sealing unit AJ composed of a sealing structure A and a J-shaped sealing ring and an external reinforcement paste sealing unit BJ composed of a sealing structure B and a J-shaped sealing ring; the horizontal vertical mold I 321, the horizontal vertical mold II 323 and the box groove mold are respectively provided with the sealing structure A and the J-shaped sealing ring; the vertical mold I 322 and the vertical mold II 324 are respectively provided with the sealing structure B and the J-shaped sealing ring; the mold plate is provided with one or more external reinforcement paste sealing units AJ and one or more external reinforcement paste sealing units BJ; the bottom mold 31 is provided with an opening, and the plate bottom groove mold is installed from the bottom of the bottom mold 31 and fixed on the bottom mold 31; the bottom mold 31 comprises a rib bottom steel plate, a steel plate and a bottom plate connecting plate, and the bottom mold 31 is connected to the mold support through the steel plate; the rib bottom steel plate is arranged above the steel plate, a gap cavity is arranged between the rib bottom steel plate and the steel plate below the rib bottom steel plate, and a sealing ring is arranged around the rib bottom steel plate and the steel plate to form a cylinder cavity together, which is used as a power source for UHPC prefabricated plate demolding and jacking; after the mold plate system is assembled, the bottom plane height of the plate bottom groove mold is not higher than the vertical mold 32, the upper plane of the box groove mold is flush with the vertical mold 32, and the upper plane of the rubber groove mold 341 is flush with the vertical mold 32.

[0102] Example 2, see Figures 1 to 17 The bottom mold 31 of the application further comprises a steel flat plate and a hole steel plate; the steel plate of the bottom mold 31 is 0.1mm-6.0mm wider than the rib bottom steel plate, and the rest is the same as the above-mentioned example.

[0103] Example 3, see Figures 1 to 17 The bottom mold 31 of the application is provided with a bottom plate protruding edge around the bottom mold 31, the width of the bottom plate protruding edge is 2.0mm-20.0mm, and the rest is the same as the above-mentioned example.

[0104] Example 4, see Figures 1 to 17The vertical formwork I 322 and the vertical formwork II 324 of the present application are provided with a horizontal groove I at one side of the lower end; the lateral formwork I 321 and the lateral formwork II 323 are respectively provided with a vertical groove at both ends of one side surface and a horizontal groove II at the lower end; the horizontal groove I and the horizontal groove II of the lateral formwork I 321, the vertical formwork I 322, the lateral formwork II 323 and the vertical formwork II 324 are respectively embeddedly installed with the gap of the flange of the bottom plate around the bottom die 31, and the embeddedly fitted gap range is 0.5mm-20.0mm; both ends of the vertical formwork I 322 and the vertical formwork II 324 are respectively embedded into the vertical grooves of the lateral formwork I 321 and the lateral formwork II 323, and the embedded depth in the groove is 2.0mm-20mm, and the rest is the same as the above-mentioned embodiment.

[0105] Embodiment 5, refer to Figures 1 to 17 The upper surface of the flange of the bottom plate around the bottom die 31 of the present application is respectively installed in close contact with the upper groove surface of the horizontal groove I and the horizontal groove II to ensure the vertical positioning of the formwork, and the lower end side of the lateral formwork I 321, the vertical formwork I 322, the lateral formwork II 323 and the vertical formwork II 324 is respectively in close contact with the vertical plane of the bottom plate connecting plate of the bottom die 31 and is fastened and connected by bolts, and the rest is the same as the above-mentioned embodiment.

[0106] Embodiment 6, refer to Figures 1 to 17 The rubber groove die 341 of the present application comprises a rubber pressing plate and a support box frame; the support box frame is arranged above the rubber pressing plate and is connected with the vertical formwork I 322 and the vertical formwork II 324; an arch-shaped long hole is arranged on the rubber pressing plate, the arch-shaped long hole comprises a semicircular groove and a rectangular groove; the semicircular groove and the rectangular groove constitute an arch-shaped long slot hole; the upper surface of the rectangular groove is flush with the diameter center line of the semicircular groove, and the rest is the same as the above-mentioned embodiment.

[0107] Embodiment 7, refer to Figures 1 to 17 The box groove die of the present application comprises a box bottom plate, a box front vertical plate, a box rear vertical plate and a box side vertical plate; the box front vertical plate is provided with a sealing structure on one side surface; the box rear vertical plate is provided with a through hole corresponding to the position of the steel bar and a screw hole for fixed connection, and the rest is the same as the above-mentioned embodiment.

[0108] Embodiment 8, refer to Figures 1 to 17 The J-shaped sealing ring of the present application has a circular truncated cone shape, and the outer diameter is slightly smaller than the inner diameter of the sealing structure, and the rest is the same as the above-mentioned embodiment.

[0109] Embodiment 9, refer to Figures 1 to 17The mold support 35 of the present application is composed of a rib-parallel steel 351, a cantilever support steel 352, a steel connecting plate 353, and a mold support foot; the rib-parallel steel 351 is arranged directly below the rib bottom steel plate, with a bottom space distance of no less than 40.0 cm; the rib-parallel steel 351, the cantilever support steel 352, and the mold support foot together form a door-shaped framework; the mold support foot is consolidated with the ground; the attached vibrating system includes an attached vibrator and a vibrating motor base plate, the attached vibrator is installed at the bottom of the rib-parallel steel 351 through the vibrating motor base plate, and 1-3 attached vibrators are arranged below the corresponding steel plate, and the rest are the same as the above-mentioned embodiments.

[0110] Embodiment 10, refer to Figures 1 to 17 The pneumatic demolding system of the present application includes an air groove, an air hole, a sealing combined ring around the steel plate, an air source connector, a steel plate, and a rib bottom steel plate; the air groove and the air hole are arranged on the steel plate; the sealing combined ring, the steel plate, and the rib bottom steel plate form a pneumatic cavity; one end of the air hole is connected to the air groove, and the other end is connected to the air source connector; the steel plate is arranged along the longitudinal rib of the UHPC prefabricated plate, and the length of the steel plate is 5-300 mm longer than the length of the rib bottom steel plate; the length of the air groove is 1-300 mm shorter than the length of the rib bottom steel plate, and the rest are the same as the above-mentioned embodiments.

[0111] Embodiment 11, refer to Figures 1 to 17 In the external steel bar pulp sealing system of the present application, the sealing structure B on the vertical formwork I 322 and the vertical formwork II 324 is a semi-open circular arc stepped hole; the J-shaped sealing ring is installed at the corresponding position of the steel bar and falls into the semi-open circular arc stepped hole from above, and the rest are the same as the above-mentioned embodiments.

[0112] Embodiment 12, refer to Figures 1 to 17 The pouring construction method of the present application: the paving and spreading degree of the UHPC concrete mixture to be poured is between 580-720 mm; the poured UHPC concrete mixture is poured from one side in the longitudinal rib direction of the prefabricated plate, and the attached vibrator on the pouring side is turned on after pouring into the mold; at this time, the UHPC mixture flows to the other side along the rib direction of the prefabricated plate, and when the UHPC mixture flows to the position close to the center of the prefabricated plate, the remaining attached vibrators are turned on, and all the attached vibrators are turned off until the UHPC mixture fills the inner cavity of the mold; after the pouring of the UHPC mixture is completed, the UHPC concrete is vibrated and leveled on the plane of the prefabricated plate to realize the vibration and compaction of the UHPC prefabricated plate and the high-precision forming of its upper surface, and the rest are the same as the above-mentioned embodiments.

[0113] Embodiment 13, refer to Figures 1 to 17, the upper plane height of the exposed bottom die 31 is consistent with the bottom groove depth of the UHPC prefabricated slab template, the upper plane of the box groove die is flush with the upper plane of the UHPC prefabricated slab template, the thickness is consistent with the T-shaped post-cast joint groove depth, and the upper plane of the rubber groove die 341 is flush with the upper plane of the UHPC prefabricated slab, and the thickness is consistent with the T-shaped post-cast joint groove depth.

[0114] The bottom die 31 of the application is composed of a whole piece of steel flat plate consistent with the size of the bottom of the UHPC prefabricated slab template, and a hole steel plate and a bottom plate connecting plate consistent with the size and number of the groove on the bottom surface of the UHPC prefabricated slab template; the width size of the steel plate between the holes of the bottom die 31 is greater than the width size of the rib bottom steel plate of the UHPC prefabricated slab template.

[0115] The outer shape of the bottom groove die of the application is consistent with the inner cavity of the groove of the UHPC prefabricated slab template, and the height size of the bottom groove die of the plate is the sum of the inner cavity depth of the UHPC prefabricated slab template and the thickness size of the steel plate, and the bottom end is provided with a connecting flange 104 parallel to the upper plane of the bottom die.

[0116] Example 14, see Figures 1 to 17 , the application in the use of mold system, first will put the steel bar net made in advance into the mold system, the rubber pressing plate is provided with an arch-shaped long hole consistent with the longitudinal rib steel bar of the UHPC prefabricated slab template, the semicircular groove of the rubber pressing plate is in close contact with the corresponding position steel bar of the UHPC prefabricated slab, and the diameter size of the semicircular groove is greater than the nominal diameter of the corresponding steel bar by 0.5-1.5mm; the upper surface of the rectangular groove is flush with the diameter center line of the semicircular groove, and the lower surface of the rectangular groove is flush with the bottom surface of the T-shaped post-cast wet joint groove of the UHPC prefabricated slab.

[0117] The outer extending steel bar body sealing system 7 of the application; the outer extending steel bar passes through the sealing structure and the J-shaped sealing ring sealing unit AJ and the sealing unit BJ; the J-shaped sealing ring is in the shape of a truncated cone, the outer diameter is slightly smaller than the inner diameter of the sealing structure, and the inner diameter is greater than the nominal diameter of the corresponding steel bar by 1.0mm to 3.0mm.

[0118] Example 15, see Figures 1 to 17 , the pneumatic demolding system of the application is composed of air groove, air hole, sealing combination ring around the steel plate, air source connector, steel plate, rib bottom steel plate and UHPC concrete around the rib bottom steel plate; the air groove and the air hole are arranged on the steel plate; the sealing combination ring around the steel plate, the steel plate, the rib bottom steel plate and the UHPC concrete around the rib bottom steel plate form the pneumatic cavity; one end of the air hole is connected with the air groove, and the other end is connected with the air source connector.

[0119] Embodiment 16, see Figures 1 to 17 The application comprises a UHPC short-rib prefabricated slab and a forming mold composed of a bottom mold, a side mold and a top mold. The UHPC short-rib prefabricated slab is formed by pouring UHPC concrete and is internally provided with a steel framework. The bottom mold comprises a pedestal and a basin-type bottom mold. A plurality of basin-type bottom molds are distributed at intervals in the length direction of the pedestal. The length of the basin-type bottom mold is less than the width of the pedestal. The basin-type bottom mold is fixedly connected to the pedestal in a sealed manner. A rib bottom groove is formed between adjacent basin-type bottom molds. A rib plate is formed at a position corresponding to the rib bottom groove in the UHPC short-rib prefabricated slab. A rib bottom steel plate is arranged on the bottom surface of the rib plate. A plurality of studs are welded to the rib bottom steel plate. The studs are poured into the UHPC short-rib prefabricated slab. An air groove and an air vent hole that penetrates the pedestal and communicates with the air groove are arranged at the rib bottom groove of the pedestal. The width of the rib bottom steel plate is equivalent to the width of the rib bottom groove. The length of the rib bottom steel plate is less than the width of the UHPC short-rib prefabricated slab. The rib bottom steel plate covers the air groove. The rib bottom steel plate is sealingly connected to the pedestal through sealing glue around the rib bottom steel plate. The UHPC concrete covers both ends of the rib bottom steel plate. The air vent hole is connected to a high-pressure gas source through a high-pressure gas pipe.

[0120] The air vent hole of the application is located on one side of the air groove. The air vent hole and the air groove are connected through an air vent groove.

[0121] The high-pressure gas source of the application comprises an air compressor and a high-pressure gas tank connected to the air compressor. The high-pressure gas tank is connected to a main pipe. The main pipe is connected to each air vent hole through a branch hose.

[0122] The branch hose of the application is a transparent tube.

[0123] Embodiment 17, see Figures 1 to 2 ,

[0124] The pneumatic demolding process of the application comprises the following steps:

[0125] 1) Connect the pedestal hose and close the pedestal main valve.

[0126] 2) Then open the air compressor (open the air compressor or the air tank pressure relief valve, and the air compressor will automatically start) and the air tank main valve, so that the pressure in the air tank reaches 0.8Mpa.

[0127] 3) Quickly open the corresponding pedestal main valve. High-pressure gas is discharged from the hole in one time, so as to separate the prefabricated slab and the pedestal.

[0128] 4) Check whether there is a gap between the prefabricated slab and the pedestal. If a local area is found to be not separated, close the pedestal main valve, leave the hose in this area, and pull out the hose in other areas; repeat the above operation to demold the area twice.

[0129] 5) After demolding, close the pedestal main valve and pull out the hose.

Claims

1. A mold system for UHPC short rib bridge deck precast panels, characterized by: The mold comprises a bottom mold (31), a vertical mold (32) and a groove mold (33), the groove mold (33) is provided with convex surfaces, the cross section of the convex surfaces is trapezoidal, and the rib bottom grooves are formed by combining two convex surfaces; the width of the upper end of the groove mold (33) is smaller than the width of the lower end of the groove mold (33); the bottom mold (31) is connected with the vertical mold (32) around to form a mold groove; the groove mold (33) is not connected with the vertical mold (32) in the mold groove and keeps a relative distance with the vertical mold (32); the height of the upper end of the groove mold (33) is lower than the height of the vertical mold (32); the edge of the bottom mold (31) is a convex bottom mold convex edge (312), the side of the vertical mold (32) close to the bottom mold (31) is provided with a groove matched with the bottom mold convex edge (312) of the edge of the bottom mold (31), so that the bottom mold (31) is sealed and matched with the vertical mold (32) around; the vertical mold (32) comprises a horizontal vertical mold I (321), a vertical vertical mold I (322), a horizontal vertical mold II (323) and a vertical vertical mold II (324); the horizontal vertical mold I (321) and the horizontal vertical mold II (323) are arranged in parallel; the vertical vertical mold I (322) and the vertical vertical mold II (324) are arranged in parallel; the horizontal vertical mold I (321), the horizontal vertical mold II (323), the vertical vertical mold I (322) and the vertical vertical mold II (324) are respectively provided with grooves matched with the bottom mold convex edge (312) of the outer edge of the bottom mold (31); the grooves of the horizontal vertical mold I (321), the horizontal vertical mold II (323), the vertical vertical mold I (322) and the vertical vertical mold II (324) are respectively matched and installed on the bottom mold convex edge (312) of the outer edge of the bottom mold (31); the vertical mold (32) further comprises a rubber groove mold (341), the rubber groove mold (341) comprises a rubber pressing plate (3411) and a support box frame (3412); the rubber pressing plate (3411) is provided with an arch-shaped long hole; the mold system further comprises a demolding system, the demolding system comprises the groove mold (33), one or more rib bottom plates (37), UHPC concrete (336) and a compressed air supply system.The groove die (33) comprises a groove bottom surface (332), a groove slope (334) and a groove top surface (333), the groove bottom surface (332), the groove slope (334) and the groove top surface (333) constitute a trapezoidal cross section, two or more trapezoidal cross sections constitute the groove die (33), the groove bottom surface (332) is provided with an air groove (331) and an air hole (335) and can be connected to compressed air through the air hole (335), the rib bottom plate (37) is symmetrically arranged and covers the groove bottom surface (332), the length of the rib bottom plate (37) is less than the length of the groove bottom surface (332) of the groove die (33), after the prefabricated pouring UHPC concrete (336), the pneumatic chamber is composed of the groove bottom surface (332), the rib bottom plate (37) and the UHPC concrete (336) at both ends of the length direction of the rib bottom plate (37), after the prefabricated UHPC concrete reaches the strength, the rib bottom plate (37) is supported by the compressed air supplied through the air hole (335), after the adhesive layer between the groove slope (334) and the groove top surface (333) and the UHPC concrete is destroyed, the UHPC prefabricated slab is separated from the groove die (33).

2. The mold system for UHPC short-rib bridge deck precast panels of claim 1, wherein: The rib bottom groove is provided with a gas groove (331) and can be connected to gas, and the rib bottom plate (37) is placed and covers the opening groove surface of the gas groove (331), so that the rib bottom plate (37) and the gas groove (331) form a pneumatic chamber.

3. The mold system for UHPC short-rib bridge precast panels according to any one of claims 1-2, characterized in that: The mold further comprises a mold support (35), and the bottom mold (31) is installed in a plane on the upper portion of the mold support (35); the mold support (35) comprises a rib-parallel steel (351), a cantilever support steel (352), a steel connecting plate (353), and a mold support leg; the rib-parallel steel (351) is arranged below the bottom mold (31), the mold support leg is provided with the steel connecting plate (353), the steel connecting plate (353) is connected with the rib-parallel steel (351) through the cantilever support steel (352), the rib-parallel steel (351) is erected on two corresponding cantilever support steels (352), and the mold support leg is consolidated with the ground; the rib-parallel steel (351), the cantilever support steel (352), and the mold support leg constitute a door-shaped framework.

4. The mold system for UHPC short-rib bridge deck precast panels of claim 3, wherein: The cantilever support steel (352) is arranged on the steel connecting plate (353) in a position range between the central vertical line of the mold support leg and the central vertical line of the steel connecting plate (353).

5. The mold system of the UHPC short-ribbed bridge prefabricated slab according to any one of claims 1, 2, 4, characterized in that: The vertical mold (32) further comprises a box groove mold, and the box groove mold comprises a box bottom plate, a box front vertical plate, a box rear vertical plate, and a box side vertical plate. One side of the box front vertical plate is provided with a sealing structure; the box rear vertical plate is provided with a through hole corresponding to the position of the steel bar and a screw hole for connecting and fixing.

6. The mold system for UHPC short-rib bridge deck precast panels of claim 1, wherein: The arch-shaped long slot hole comprises a semicircular groove (34111) and a rectangular groove (34112); the semicircular groove (34111) and the rectangular groove (34112) can form an arch-shaped long slot hole.

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