CN216578424U

CN216578424U - Mould system of short rib bridge floor prefabricated plate of UHPC

Info

Publication number: CN216578424U
Application number: CN202120070075.2U
Authority: CN
Inventors: 喻满; 邵旭东; 吴新印; 李平辉; 张法; 刘兆丰; 莫富文
Original assignee: Hunan Zhonglu Huacheng Bridge Technology Co ltd; Hunan University
Current assignee: Hunan Zhonglu Huacheng Bridge Technology Co ltd; Hunan University
Priority date: 2021-01-12
Filing date: 2021-01-12
Publication date: 2022-05-24
Anticipated expiration: 2031-01-12

Abstract

A mould system of a UHPC short rib bridge deck precast slab belongs to a mould of precast slabs. The bridge deck precast slab mainly solves the technical problems of low strength, complex construction and the like of the existing bridge deck precast slab. The key points of the technical scheme are as follows: the mould includes die block (31), founds mould (32) and groove mould (33), the cross section that is equipped with convex surface and convex surface on groove mould (33) is trapezoidal, and the combination forms the rib kerve between two liang of convex surfaces, the width of groove mould (33) upper end is less than the width of groove mould (33) lower extreme, die block (31) are connected all around and are found mould (32) and constitute the mould groove, groove mould (33) are in the mould inslot and do not with found mould (32) and be connected and with found mould (32) and keep relative distance, the upper end height of groove mould (33) is less than the height of founding mould (32). The method is mainly applied to the prefabrication process of the bridge deck precast slab.

Description

Mould system of short rib bridge floor prefabricated plate of UHPC

Technical Field

The utility model relates to a die for a prefabricated slab, in particular to a die system for a UHPC (ultra high Performance concrete) short rib bridge deck prefabricated slab.

Background

The bridge deck directly bears vehicle load and environmental action, and is the most direct member affected by adverse factors such as overload, corrosion, fatigue and the like, so the working state of the bridge deck directly affects the durability and the driving comfort of the main structure of the bridge. Orthotropic steel bridge deck slabs and common concrete bridge deck slabs are two main bridge deck slab forms applied to bridge engineering at present. Ordinary concrete bridge deck slab can adapt to bituminous concrete bridge floor pavement or cement pavement betterly, and the driving effect is better, nevertheless because ordinary concrete tensile strength is on the low side, leads to its thick great, and the structure dead weight is great, is difficult to adapt to the demand of large-span bridge, and is easy to split near wet seam, hogging moment district, suspension cable anchor region. The orthotropic steel bridge deck has the advantages of light self weight, large ultimate bearing capacity, short construction period and the like, is widely applied to large-span bridges, and is easy to generate diseases such as fatigue cracking, pavement damage and the like due to low rigidity, poor cohesiveness with asphalt concrete, poor deformation coordination performance and the like.

The ultra-high performance concrete (namely UHPC) has the advantages of high elastic modulus, high compression resistance, high tensile strength, good creep property and the like, can reduce the size of a structure, lighten the self weight of the structure, improve the effectiveness of the load resistance of the structure and increase the spanning capacity. Therefore, the ultra-high performance concrete bridge deck based on the ultra-high performance concrete performance research and development can avoid the difficult problems of fatigue cracking and easy pavement damage of orthotropic steel bridge deck, can reduce the self weight of the structure, adapts to the requirement of a large-span bridge, can solve the difficult problem of easy cracking of a common concrete bridge deck by the ultra-high performance concrete with excellent tensile performance, and has good durability.

At present, the rapid construction technology of prefabricated assembly in the bridge construction field is vigorously researched, developed and applied by the nation and the industry; similarly, technologies of prefabrication production, installation construction and the like of bridge deck structures applying the ultra-high performance concrete are gradually developed and begin to be applied; however, due to the lack of corresponding experience in the aspect of ultra-high performance concrete precast bridge deck in China, the corresponding template manufacturing, installation and the like are not mature enough. In addition, the standard ultra-high performance concrete bridge deck slab prefabricated part is generally in a cuboid structure (a step form exists at the edge wet joint part); according to the installation requirement of actual engineering, the prefabricated components of the ultra-high performance concrete bridge deck slab generally need to have ribs on four joint surfaces around. Besides the connection strength between the new concrete and the old concrete can be enhanced by the aid of the steel bars, and the connection strength between the new concrete and the old concrete can be further enhanced by arranging the rough surface on the surface of the prefabricated member. Correspondingly, when the surface of the ultra-high performance concrete needs to be ribbed, the concrete side template needs to be reserved with rib penetrating holes (through holes) for the reinforcing steel bars to penetrate through and comprises the template joint, and slurry leakage can be caused. Meanwhile, the ultra-high performance concrete can be bonded with the template after being cured, and the volume of the cured concrete expands, so that the demolding is difficult due to the factors, and the template can be easily damaged due to the fact that the mold needs to be strongly demolded by great working strength.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a die system for a UHPC short rib bridge deck precast slab, which is rapid and high in finished product efficiency.

The technical scheme adopted by the utility model for solving the technical problems is as follows: the mould includes die block 31, found mould 32 and groove mould 33, the cross section that is equipped with convex surface and convex surface on the groove mould 33 is trapezoidal, and the combination forms the rib kerve between two liang of convex surfaces, the width that the width of groove mould 33 upper end is less than the width of groove mould 33 lower extreme, die block 31 is connected all around and is found mould 32 and constitute the mould groove, groove mould 33 is in the mould inslot is not connected with found mould 32 and is kept relative distance with found mould 32, the upper end height of groove mould 33 is less than the height of found mould 32.

According to the utility model, the edge of the bottom die 31 is the convex bottom die convex edge 312, and the side of the vertical die 32 close to the bottom die 31 is provided with the groove matched with the bottom die convex edge 312 on the edge of the bottom die 31, so that the periphery of the bottom die 31 is in sealing fit with the vertical die 32, thereby ensuring that the bottom die 31 and the vertical die 32 are relatively fixed more firmly, the installation size is more accurate, the installation is more convenient, and the mutual sealing is more convenient.

The bottom die 31 of the utility model further comprises a bottom die connecting plate 313, the bottom die connecting plate 313 is arranged on the end surface close to the bottom die convex edge 312, and the vertical die 32 is tightly connected with the bottom die connecting plate 313 after being matched with the bottom die convex edge 312 with the convex strip-shaped outer edge of the bottom die 31 through the groove.

The periphery of the bottom die 31 is provided with a bottom die convex edge 312, and the width of the bottom die convex edge 312 is 0.1 mm-500 mm.

The inventive mould system also comprises a demoulding system, which is combined by the slot mould 33, one or more rib floors 37, UHPC concrete 336 and a compressed air supply system; the groove die 33 is composed of a groove bottom surface 332 and a groove top surface 333, the groove bottom surface 332 and the groove inclined surface 334 form a trapezoid cross section, more than two trapezoid cross sections are formed, an air groove 331 is formed in the groove bottom surface 332, compressed air can be introduced through an air vent 335, the rib bottom plates 37 are symmetrically placed and cover the groove bottom surface 332, the length of the rib bottom plates 37 is smaller than that of the groove die 33, after UHPC concrete 336 is prefabricated and poured, pneumatic cavities are formed by the groove bottom surface 332, the rib bottom plates 37 and the UHPC concrete 336 at two ends of the rib bottom plates 37 in the length direction, after the UHPC concrete is prefabricated to reach strength, the rib bottom plates 37 are supported by the compressed air through the air vent 335), and after the groove inclined surface 334 and an adhesive layer between the groove top surface 333 and the UHPC concrete are damaged, the UHPC precast slab is separated from the groove die 33.

The length of the air groove 331 arranged in the groove bottom surface 332 of the groove die 33 is 10 mm-100 mm smaller than the length of the groove bottom surface 332 of the groove die 33, the groove depth of the air groove 331 is 0.1 mm-5.0 mm, and the groove width is 0.5 mm-5.0 mm.

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

The compressed air supply system comprises a system compressed air connecting pipeline, an air supply main valve 337, connecting air pipes of all vent holes 335 of the single UHPC prefabricated plate are connected in parallel with an outlet pipe of the air supply main valve 337, the air supply main valve 337 is opened, and all air cavities arranged on the single UHPC prefabricated plate supply air simultaneously.

The demolding system can further comprise a mold and a rib bottom plate 37, the mold comprises a groove mold 33, convex surfaces are arranged on the groove mold 33, the cross section of each convex surface is trapezoidal, a rib bottom groove is formed by combining every two convex surfaces, an air groove 331 is arranged on each rib bottom groove and can be filled with air, the rib bottom plate 37 is placed on and covers the groove opening surface of the air groove 331, and the rib bottom plate 37 and the air groove 331 form a pneumatic cavity.

The rib bottom grooves are provided with air grooves 331 and can be filled with air, and the rib bottom plates 37 are placed on and cover the groove surfaces of the air grooves 331, so that the rib bottom plates 37 and the air grooves 331 form pneumatic cavities.

The vertical mold 32 comprises a transverse vertical mold I321, a vertical mold I322, a transverse vertical mold II 323 and a vertical mold II 324 which are connected in a matched mode, grooves matched with a bottom mold convex edge 312 on the outer edge of a bottom mold 31 are respectively formed in the transverse vertical mold I321, the transverse vertical mold II 323, the vertical mold I322 and the vertical mold II 324, and the grooves of the transverse vertical mold I321, the transverse vertical mold II 323, the vertical mold I322 and the vertical mold II 324 are respectively installed on the bottom mold convex edge 312 on the outer edge of the bottom mold 31 in a matched mode.

The outer edge of the end face of a vertical mold I322, which is close to a transverse vertical mold I321 and a transverse vertical mold II 323, is provided with a convex strip-shaped convex edge 3221 of the vertical mold I, the outer edge of the end face of the vertical mold II 324, which is close to the transverse vertical mold I321 and the transverse vertical mold II 323, is provided with a convex strip-shaped convex edge 3241 of the vertical mold II, one end of the inner side of the transverse vertical mold I321 is provided with a groove matched with the vertical mold I convex edge 3221 of the outer edge of the vertical mold I322, and the other end of the inner side of the transverse vertical mold I321 is provided with a groove matched with the vertical mold II convex edge 3241 of the outer edge of the vertical mold II 324; one end of the inner side of the horizontal vertical mold II 323 is provided with a groove matched with the vertical mold I convex edge 3221 at the outer edge of the vertical mold I322, and the other end of the inner side of the horizontal vertical mold II 323 is provided with a groove matched with the vertical mold II convex edge 3241 at the outer edge of the vertical mold II 324.

The mold of the utility model also comprises a mold bracket 35, and the bottom mold 31 is arranged on the upper part of the mold bracket 35 in a plane; the die support 35 comprises a rib-direction section steel 351, a cantilever support section steel 352, a section steel connecting plate 353 and a die set support leg; the longitudinal rib-shaped steel 351 is arranged below the bottom die 31, the formwork support leg is provided with a section steel connecting plate 353, the section steel connecting plate 353 is connected with the longitudinal rib-shaped steel 351 through a cantilever support section steel 352, the longitudinal rib-shaped steel 351 is erected on two corresponding cantilever support section steels 352, and the formwork support leg is fixedly connected with the ground; the forward rib-direction section steel 351, the cantilever support section steel 352 and the formwork support leg form a door-shaped framework.

The mold of the present invention includes a mold holder 35; the bottom die 31 comprises a steel intermediate plate and a bottom plate connecting plate, and the bottom die 31 is connected with the die support 35 through the steel intermediate plate.

The range of the position where the cantilever support section steel 352 of the present invention is disposed on the section steel connection plate 353 is between the center vertical line of the formwork support leg and the center vertical line of the section steel connection plate 353.

The vertical mold 32 of the utility model further comprises a box groove mold, wherein 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; a sealing structure is arranged on one side face of the vertical plate in front of the box; the box back vertical plate is provided with a through hole corresponding to the position of the steel bar and a screw hole for connecting, installing and fixing.

The vertical mold 32 of the present invention further comprises a rubber groove mold 341, and the rubber groove mold 341 comprises a rubber pressing plate 3411 and a supporting box frame 3412; the supporting box frame 3412 is arranged above the rubber pressure plate 3411 and connected with the vertical die 32, and the rubber pressure plate 3411 is provided with an arched long strip hole which comprises a semicircular groove 34111 and a rectangular groove 34112; the semicircular groove 34111 and the rectangular groove 34112 may form an arcuate elongated slot with each other.

The supporting box frame 3412 of the present invention is disposed above the rubber pressing plate 3411, and is connected to the vertical mold i 322 and the vertical mold ii 324.

The upper surface of the rectangular groove 34112 of the present invention is flush with the diametrical center line of the semicircular groove 34111

The periphery of the bottom die 31 is provided with a bottom die convex edge 312, and the width of the bottom die convex edge 312 is 2.0 mm-20.0 mm.

The rubber groove die 341 of the present invention is installed on the upper inner sides of the vertical die I322 and the vertical die II 324.

The utility model installs a bottom groove die on a die so as to produce a UHPC prefabricated bridge deck with a groove.

According to the utility model, the vertical die 32 is arranged on the periphery of the bottom die 31 in a longitudinally sealing and matching manner, the bottom die convex edge in a convex strip shape is arranged on the outer edge of the bottom die 31, and the groove matched with the bottom die convex edge on the outer edge of the bottom die 31 is arranged on the inner side of the vertical die 32, so that the bottom die 31 and the vertical die 32 are relatively fixed more firmly, the installation size is more accurate, the installation is more convenient, and the mutual sealing is more convenient.

The bottom die 31 of the utility model further comprises a bottom die connecting plate, the bottom die connecting plate is arranged on the end surface close to the bottom die convex edge, and the vertical die 32 is tightly connected with the bottom die connecting plate after being matched with the bottom die convex edge with the convex strip-shaped outer edge of the bottom die 31 through the groove.

The vertical mold 32 comprises a transverse vertical mold I, a vertical mold I, a transverse vertical mold II and a vertical mold II which are connected in a matched mode, grooves matched with bottom mold convex edges on the outer edge of a bottom mold 31 are formed in the transverse vertical mold I, the transverse vertical mold II, the vertical mold I and the vertical mold II respectively, and the grooves of the transverse vertical mold I, the transverse vertical mold II, the vertical mold I and the vertical mold II are installed on the bottom mold convex edges on the outer edge of the bottom mold 31 in a matched mode respectively.

The outer edge of the end face of a vertical mold I, which is close to a transverse vertical mold I and a transverse vertical mold II, is provided with a convex strip-shaped convex edge of the vertical mold I, the outer edge of the end face of the vertical mold II, which is close to the transverse vertical mold I and the transverse vertical mold II, is provided with a convex strip-shaped convex edge of the vertical mold II, one end of the inner side of the transverse vertical mold I is provided with a groove matched with the convex edge of the vertical mold I at the outer edge of the vertical mold I, and the other end of the inner side of the transverse vertical mold I is provided with a groove matched with the convex edge of the vertical mold II at the outer edge of the vertical mold II; the horizontal II inboard one ends of founding the mould are provided with the vertical I chimb matched with recess of founding the mould of I outward flange of vertical founding the mould, the other end be provided with the vertical II outward flange of founding the mould of vertical II outward flanges chimb matched with recess.

The periphery of the bottom die 31 is provided with a bottom die convex edge, and the width of the bottom die convex edge is 2.0 mm-20.0 mm.

The lower ends of one sides of a vertical mould I and a vertical mould II are respectively provided with a vertical horizontal groove I and a vertical horizontal groove II; two vertical grooves are formed in two ends of one side face of each of the transverse vertical mold I and the transverse vertical mold II respectively; the lower ends of the transverse vertical mold I and the transverse vertical mold II are respectively provided with a transverse horizontal groove I and a transverse horizontal groove II; the vertical horizontal grooves I, the vertical horizontal grooves II, the horizontal grooves I and the horizontal grooves II of the transverse vertical mold I, the vertical mold I, the transverse vertical mold II and the vertical mold II are respectively embedded and installed with bottom mold convex edges around the bottom mold 31 in a clearance mode, and the range of embedding fit clearance is 0.5 mm-20.0 mm; the vertical mold I and the vertical mold II are provided with I convex edges at two ends and II convex edges respectively embedded into I transverse vertical grooves and II transverse vertical grooves of the I transverse vertical mold and II transverse vertical molds, and the depth of the embedded grooves is 2.0 mm-20 mm.

The upper planes of the bottom die convex edges on the periphery of the bottom die 31 are respectively clung to the upper groove surfaces of the vertical horizontal groove I and the vertical horizontal groove II to ensure the vertical positioning of the vertical die, and the lower end sides of the horizontal vertical die I, the vertical die I, the horizontal vertical die II and the vertical die II are respectively clung to the vertical plane of the bottom die connecting plate of the bottom die 1 and are fixedly connected by bolts.

In the convex surface of the groove die 33 of the present invention, the width of the upper end surface of the convex surface is smaller than the width of the lower end of the convex surface.

The lower ends of one sides of a vertical mould I322 and a vertical mould II 324 are provided with a horizontal groove I; two ends of one side face of each of the transverse vertical mold I321 and the transverse vertical mold II 323 are respectively provided with a vertical groove, and the lower end of each vertical groove is provided with a horizontal groove II; the horizontal grooves I and the horizontal grooves II of the transverse vertical mold I321, the vertical mold I322, the transverse vertical mold II 323 and the vertical mold II 324 are respectively embedded with the bottom plate convex edge gaps around the bottom mold 31, and the embedding fit gap range is 0.1 mm-200 mm; the two ends of the vertical mold I322 and the vertical mold II 324 are respectively embedded into vertical grooves of the transverse vertical mold I321 and the transverse vertical mold II 323, and the depth of the embedded grooves is 0.1 mm-200 mm.

The upper planes of the convex edges of the bottom plate on the periphery of the bottom die 31 are respectively tightly attached to the upper groove surfaces of the horizontal groove I and the horizontal groove II to ensure the vertical positioning of the vertical die, and the lower end sides of the transverse vertical die I321, the vertical die I322, the transverse vertical die II 323 and the vertical die II 324 are respectively tightly attached to the vertical plane of the bottom plate connecting plate of the bottom die 31 and are tightly connected by bolts.

The die support 35 of the utility model is composed of a rib-direction section steel 351, a cantilever support section steel 352, a section steel connecting plate 353 and a die carrier support leg; the section steel 351 in the rib direction is arranged right below the rib bottom steel plate, and the bottom space distance of the section steel is 0.1 cm-400 cm.

According to the utility model, the through hole is formed in the bottom die 31, and the groove die at the bottom of the plate is installed upwards from the lower part of the bottom die 31 through the through hole in the bottom die 31 and is fixed on the bottom die 31, so that the UHPC prefabricated bridge deck plate with the groove can be poured, and the assembly and disassembly are very convenient.

The utility model installs the box groove die in the die to form the connecting structure on the design requirement on the bridge deck of the casting type.

The vertical mold 32 comprises a box groove mold which comprises a box bottom plate, a box front vertical plate, a box rear vertical plate and a box side vertical plate; a sealing structure is arranged on one side face of the vertical plate in front of the box; the box back vertical plate is provided with a through hole corresponding to the position of the steel bar and a screw hole for connecting, installing and fixing.

The box slot die is arranged on the upper parts of the transverse vertical die I321 and the transverse vertical die II 323.

The spreading and expanding degree of the mixed material of UHPC concrete to be poured reaches 580-720 mm.

The bottom die 31 of the utility model also comprises a steel flat plate and a hole steel plate; the width of the steel intermediate plate of the bottom die 31 is 0.1-60 mm larger than that of the rib bottom steel plate.

The demolding system further comprises a high-pressure pneumatic system connection, the bottom of the air tank 331 is provided with an air vent 335, the diameter of the air vent 3-1 is 0.1-100 mm, and the air tank 331 is connected with the high-pressure pneumatic system through the air vent 335.

The air groove 331 of the present invention is provided 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 0.1 mm-2000 mm smaller than that of the rib bottom groove, the groove depth of the air groove 331 is 0.1 mm-50 mm, and the groove width is 0.1 mm-50 mm.

The high-pressure pneumatic system comprises an air compressor, an air tank, a valve, an air pressure conveying pipeline and the like; the high-pressure pneumatic system can provide an air medium with the pressure of 0.1 MPa-100 MPa.

The air groove 331 of the present invention is provided at an intermediate position between the two groove molds 33.

The air groove 331 of the present invention may also be provided at an intermediate position of the rib-bottom groove.

The length of the air groove 331 of the present invention is close to or slightly less than the length of the rib bottom plate 37.

The width of the air groove 331 of the present invention is close to or slightly less than the width of the rib bottom plate 37.

In the production process, firstly, a rib bottom steel plate is placed between a groove die and a groove die or in a rib bottom groove, then the die is poured, after the poured material covers a rib bottom plate, a prefabricated plate, the rib bottom plate and the air groove which are formed by pouring are combined to form a sealed pneumatic cavity, the air groove is inflated, the air pressure in the air groove applies uniform air pressure to the rib bottom plate, when the air in the air groove pushes the rib bottom plate to ascend, the two sides of the rib bottom of the prefabricated plate are separated from the two sides of the rib bottom groove, and then the air in the air groove flows out from the two ends of the air groove and is inflated upwards along the two sides of the rib bottom groove, so that the air acts on other parts without the air groove of the prefabricated plate, the other parts without the air groove cannot be demolded, the prefabricated plate is damaged, and the effect of one-time demolding is achieved.

The rib bottom plate can be a longitudinal rib, a transverse rib or a common transverse rib and longitudinal rib; the upper end of the rib bottom plate is provided with a shear key;

the length of the rib bottom plate is 1 mm-900 mm, preferably 5 mm-300 mm, less than that of the groove die;

the width of the rib bottom plate is 0.01-100 mm, preferably 0.5-10 mm smaller than the width between the two groove dies;

the length of the air groove is 0.01 mm-600 mm, preferably 1 mm-200 mm, less than that of the rib bottom plate;

the depth of the air groove is 0.01 mm-20 mm, preferably 0.1 mm-5 mm; the width of the groove is 0.1 mm-10 mm, preferably 0.5 mm-5 mm;

the vent holes 335 of the present invention are disposed at both sides of the air tank, one end is connected with the air tank, and the other end is connected with the high pressure pneumatic system; the diameter of the vent hole 335 is 0.1 mm-10 mm, preferably 0.5 mm-5 mm;

the high-pressure pneumatic system comprises an air compressor, an air tank, a valve and an air pressure conveying pipeline; the high-pressure pneumatic system can provide an air medium with the pressure of 0.5 MPa-1 MPa.

The utility model can also comprise a steel bottom die, a UHPC prefabricated plate rib bottom steel plate, sealing combined rings arranged at the periphery of the steel bottom die and the UHPC prefabricated plate rib bottom steel plate, a pneumatic cavity and a compressed air joint; the steel bottom die is tightly attached to a rib bottom steel plate of the UHPC prefabricated plate; the sealing combination ring comprises a sealing strip, and the sealing strip is arranged at the peripheral edge of the steel bottom die and extends upwards to form a groove type capable of accommodating a rib bottom steel plate of the UHPC prefabricated plate; be equipped with air vent, air duct and air duct on the steel die block, the air duct sets up at steel die block intermediate position and extends to steel die block both ends, the air vent sets up in the air duct both sides, the air vent passes through the air duct and is connected with the air duct, the pneumatic chamber passes through die block, UHPC prefabricated plate rib end steel sheet, sealed combination circle and air duct combination formation.

The steel bottom die comprises a strip shape, and the length of the strip shape is 5 mm-300 mm greater than that of the rib bottom steel plate of the UHPC prefabricated plate; the width of the steel bottom die is 0.5 mm-10.0 mm larger than that of the rib bottom steel plate.

The length of the air groove on the upper surface of the steel bottom die is 1 mm-200 mm smaller than that of the rib bottom steel plate, the depth of the air groove is 0.1 mm-5.0 mm, and the width of the air groove is 0.5 mm-5.0 mm.

One end of the vent hole is connected with the air groove through the vent groove, and the other end of the vent hole is connected with the compressed air joint; the diameter of the vent hole is 5-10 mm.

The pneumatic demoulding method of the utility model comprises the following steps: by using the demoulding structure, after the concrete of the UHPC precast slab reaches the designed strength or the strength allowing demoulding, a pneumatic cavity is formed; at the moment, the vertical template with the constraint on demolding at the periphery of the prefabricated plate is firstly removed, the compressed air connector is connected with a compressed air source, and high-pressure air is introduced into the pneumatic cavity through the vent hole and the air groove; the thrust generated in the pneumatic cavity jacks up the rib bottom steel plate of the UHPC precast slab and pushes the UHPC precast slab to integrally move upwards, and meanwhile, the steel bottom die generates a downward movement trend so that the precast slab is separated from the steel bottom die by 10.02-1.2 mm; at this time, the sealing combination ring around the pneumatic cavity is damaged, and compressed air overflows from the contact surface of the steel moulding plate and the UHPC precast slab, so that the jacking power is lost or weakened, and meanwhile, the UHPC precast slab moves downwards due to the action of gravity and is supported by the steel moulding plate again, and at this time, the demoulding process is finished.

The assembly process of the utility model comprises the following steps:

step S1: horizontally placing a bottom die on the die carrier, and mutually assembling the adjacent transverse vertical die I, the vertical die I and the bottom die;

step S2: splicing the transverse vertical mold II and the bottom mold together, inserting transverse steel bars, then splicing the vertical mold II, the box groove mold and the bottom mold together, and inserting vertical steel bars;

step S3: placing the manufactured reinforcing mesh at the upper ends of the transverse vertical mold I, the vertical mold I, the transverse vertical mold II and the vertical mold II;

step S4: and rubber groove molds are arranged on the inner sides of the vertical mold I and the vertical mold II.

The utility model has the beneficial effects that: the bridge deck manufacturing method has high efficiency, can accurately separate the bridge deck from the mould at the optimal time, and does not damage the structure of the bridge deck; the method is not influenced by the environment of severe cold and hot summer or continuous rainy days of the construction site, and can be directly produced in a factory to finish direct installation on the construction site. It is mainly applied to the bridge deck precast slab process.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic structural view of the present invention;

FIG. 3 is a partial cross-sectional view of the present invention;

FIG. 4 is a top view of the present invention;

FIG. 5 is a partial schematic view of the present invention;

FIG. 6 is a schematic view of the vertical formwork I of the present invention;

FIG. 7 is a schematic view of the vertical stand of the present invention II;

FIG. 8 is a schematic view of the transverse vertical mold I of the present invention;

FIG. 9 is a schematic view of the transverse stand module II of the present invention;

FIG. 10 is a schematic view of the present invention in a configuration on a mold;

FIG. 11 is a schematic view of the present invention on a mold;

FIG. 12 is a schematic structural view of the present invention;

FIG. 13 is a schematic structural view of the present invention;

FIG. 14 is a schematic view of the structure of the present invention on a mold;

FIG. 15 is a schematic view of the present invention on a mold;

FIG. 16 is a schematic view of the mold construction of the present invention;

FIG. 17 is a schematic structural view of the vertical mold of the present invention;

FIG. 18 is a perspective view of the present invention;

FIG. 19 is a schematic structural view of the present invention;

FIG. 20 is a top view of the present invention;

FIG. 21 is a schematic view of the slot die configuration of the present invention;

FIG. 22 is a schematic illustration of the stripping gas flow of the present invention;

FIG. 23 is a schematic illustration of the mold release air flow of the present invention;

FIG. 24 is a side schematic view of the ribbed bottom plate of the present invention positioned on a slot die;

FIG. 25 is a schematic view of the venting of the present invention;

FIG. 26 is a schematic structural view of the present invention;

FIG. 27 is a schematic view of the pre-buried hoisting connection device of the present invention;

figure 28 is a schematic view of a lifting connection of the present invention.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples.

Embodiment 1, referring to fig. 1 to 17, the present invention includes a bottom die, a vertical die, a rubber groove die, a box groove die, a bottom groove die, a die holder, an overhanging reinforcement slurry sealing system, an attached vibrating system, and a pneumatic demoulding system; the bottom die is fixed on the die support, and the vertical die is vertically arranged on the periphery of the bottom die; the vertical mold comprises a transverse vertical mold I321, a vertical mold I322, a transverse vertical mold II 323 and a vertical mold II 324, and the lower side part of the vertical mold is fixedly connected with the bottom mold through bolts; the upper parts of the transverse vertical mold I321 and the transverse vertical mold II 323 are provided with box slot molds, and the upper parts of the vertical mold I322 and the vertical mold II 324 are provided with rubber slot molds 341; the overhanging steel bar slurry sealing system comprises an overhanging steel bar slurry sealing unit AJ consisting of a sealing structure A and a J-shaped sealing ring and an overhanging steel bar slurry sealing unit BJ consisting of a sealing structure B and a J-shaped sealing ring, wherein the transverse vertical die I321, the transverse vertical die II 323 and the box groove die are respectively provided with the sealing structure A and the J-shaped sealing ring; the vertical die I322 and the vertical die II 324 are respectively provided with a sealing structure B and a J-shaped sealing ring, and more than 1 overhanging steel bar slurry sealing unit AJ and more than 1 overhanging steel bar slurry sealing unit BJ are arranged in the template; an opening is formed in the bottom die 31, and a groove die at the bottom of the plate is installed and fixed on the bottom die 31 from the lower direction of the bottom die 31; the bottom die 31 comprises a rib bottom steel plate, an intermediate steel plate and a bottom plate connecting plate, and the bottom die 31 is connected with the die support through the intermediate steel plate; the rib bottom steel plate is arranged above the steel intermediate plate, a clearance cavity is arranged between the rib bottom steel plate and the steel intermediate plate below the rib bottom steel plate, and sealing rings are arranged on the peripheries of the rib bottom steel plate and the steel intermediate plate to jointly form a cylinder cavity which is used as a power source for demoulding and jacking of the UHPC precast slab; after the template system is assembled, the height of the bottom plane of the groove die at the bottom of the plate is not higher than that of the vertical die 32, the upper plane of the box groove die is flush with the vertical die 32, and the upper plane of the rubber groove die 341 is flush with the vertical die 32.

In embodiment 2, referring to fig. 1 to 17, the bottom die 31 of the present invention further includes a steel plate and a perforated steel plate; the width of the steel intermediate plate of the bottom die 31 is 0.1 mm-6.0 mm larger than that of the rib bottom steel plate, and the rest is the same as the above embodiment.

In embodiment 3, referring to fig. 1 to 17, a bottom plate flange is disposed around the bottom mold 31 of the present invention, and the width of the bottom plate flange is 2.0mm to 20.0mm, which is the same as the above embodiments.

Embodiment 4, referring to fig. 1 to 17, a horizontal groove i is formed at the lower end of one side of a vertical mold i 322 and a vertical mold ii 324 according to the present invention; two ends of one side face of each of the transverse vertical mold I321 and the transverse vertical mold II 323 are respectively provided with a vertical groove, and the lower end of each vertical groove is provided with a horizontal groove II; the horizontal grooves I and the horizontal grooves II of the transverse vertical mold I321, the vertical mold I322, the transverse vertical mold II 323 and the vertical mold II 324 are respectively embedded with the bottom plate convex edge gaps around the bottom mold 31, and the embedding fit gap range is 0.5 mm-20.0 mm; the two ends of the vertical mold I322 and the vertical mold II 324 are respectively embedded into vertical grooves of the transverse vertical mold I321 and the transverse vertical mold II 323, the depth of the embedded grooves is 2.0 mm-20 mm, and the method is the same as the method in the embodiment.

In embodiment 5, referring to fig. 1 to 17, the upper planes of the raised edges of the bottom plate around the bottom mold 31 of the present invention are respectively attached to the upper groove surfaces of the horizontal groove i and the horizontal groove ii to ensure the vertical positioning of the vertical mold, and the lower end sides of the horizontal vertical mold i 321, the vertical mold i 322, the horizontal vertical mold ii 323, and the vertical mold ii 324 are respectively attached to the vertical plane of the bottom plate connecting plate of the bottom mold 31 and are fastened and connected by bolts.

Embodiment 6, referring to fig. 1 to 17, a rubber slot die 341 of the present invention includes a rubber pressing plate and a supporting case frame; the supporting box frame is arranged above the rubber pressing plate and connected with the vertical mold I322 and the vertical mold II 324; the rubber pressing plate is provided with an arched door-shaped long strip hole, and the arched door-shaped long strip hole comprises a semicircular groove and a rectangular groove; the semicircular groove and the rectangular groove mutually form an arched long-strip groove 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 embodiment.

Embodiment 7, referring to fig. 1 to 17, the box slot die of the present invention includes a box bottom plate, a box front vertical plate, a box rear vertical plate, and a box side vertical plate; a sealing structure is arranged on one side face of the vertical plate in front of the box; the riser sets up the through-hole that corresponds with the reinforcing bar position behind the box and connects the fixed screw hole of installation, and the rest is the same above-mentioned embodiment.

Embodiment 8, referring to fig. 1 to 17, the J-shaped sealing ring of the present invention has a circular truncated cone shape, and the outer diameter thereof is slightly smaller than the inner diameter of the sealing structure, as in the above embodiments.

Embodiment 9, referring to fig. 1 to 17, the mold frame 35 of the present invention is composed of a down-rib section steel 351, a cantilever support section steel 352, a section steel connecting plate 353, and a mold frame support leg; the rib-direction profile steel 351 is arranged right below the rib bottom steel plate, and the space distance of the bottom surface of the rib-direction profile steel is not less than 40.0 cm; the forward rib-direction section steel 351, the cantilever support section steel 352 and the formwork support leg form a door-shaped framework together; the die carrier support leg is fixedly connected with the ground; the attached vibrating system comprises an attached vibrator and a vibrating motor substrate, wherein the attached vibrator is installed at the bottom of the rib-direction section steel 351 through the vibrating motor substrate, and 1-3 attached vibrators are arranged below the corresponding steel inter-plate, and the attached vibrating system is the same as the attached vibrating system in the embodiment.

Example 10, referring to fig. 1 to 17, the pneumatic demolding system of the present invention includes an air groove, an air vent, a sealing combination ring around an inter-steel plate, an air supply joint, an inter-steel plate, and a rib bottom steel plate; the air groove and the vent hole are arranged on the steel intermediate plate; the sealing combined ring, the steel intermediate plate and the rib bottom steel plate form a pneumatic cavity; one end of the vent hole is connected with the air tank, and the other end of the vent hole is connected with the air source connector; the steel intermediate plate is arranged along the longitudinal rib direction of the UHPC precast slab, and the length of the steel intermediate plate is 5-300 mm greater than that of the rib bottom steel plate; the length of the air groove is 1 mm-300 mm smaller than that of the rib bottom steel plate, and the rest is the same as the embodiment.

Embodiment 11, referring to fig. 1 to 17, in the sealing system for overhanging steel bar slurry according to the present invention, the sealing structures B on the vertical formwork i 322 and the vertical formwork ii 324 are semi-open circular arc step holes; the J-shaped sealing ring is arranged at the corresponding position of the steel bar and falls into the semi-open arc step hole from the upper part, and the structure is the same as that of the embodiment.

Example 12, referring to fig. 1 to 17, the casting construction method of the present invention: the spreading and expanding degree of the UHPC concrete stirred material to be poured reaches 580-720 mm; pouring UHPC concrete stirred materials from one side of the longitudinal rib direction of the precast slab, and opening an attached vibrator at the pouring side after the precast slab is put into a mould; at the moment, the UHPC stirring material flows to the other side along the direction of the prefabricated plate rib, when the UHPC stirring material flows to a position close to the center of the prefabricated plate, the rest attached vibrators are started, and all the attached vibrators are stopped until the UHPC stirring material fills the inner cavity of the template; after the UHPC stirred material is poured, the UHPC concrete is vibrated and leveled from the upper plane of the prefabricated slab so as to realize the vibration compactness and the high-precision forming of the upper surface of the UHPC prefabricated slab, and the rest is the same as the embodiment.

Example 13 referring to fig. 1 to 17, when the mold system is used to form a template of a UHPC prefabricated panel according to the present invention, the height of the upper plane of the recessed mold at the bottom of the panel and the height of the upper plane of the exposed bottom mold 31 are the same as the depth of the recessed mold at the bottom of the template of the UHPC prefabricated panel, the upper plane of the box-in-mold is flush with the upper plane of the template of the UHPC prefabricated panel, the thickness of the upper plane of the box-in-mold is the same as the depth of the T-shaped post-cast seam groove, and the upper plane of the rubber-in-mold 341 is flush with the upper plane of the UHPC prefabricated panel, and the thickness of the upper plane of the rubber-in-mold is the same as the depth of the T-shaped post-cast seam groove.

The bottom die 31 of the utility model is composed of a whole steel flat plate with the same size as the bottom of the UHPC precast slab template, and hole steel plates and bottom plate connecting plates with the same size and quantity as the grooves on the bottom of the UHPC precast slab template are arranged in the bottom die; the width dimension of the steel intermediate plate between the holes of the bottom die 31 is larger than the width dimension of the rib bottom steel plate of the UHPC precast slab template.

The shape of the groove die at the bottom of the plate is matched with the inner cavity of the groove of the UHPC precast slab template, the height of the groove die at the bottom of the plate is the sum of the depth of the inner cavity of the UHPC precast slab template and the thickness of the steel intermediate plate, and the periphery of the bottommost end of the groove die is provided with a connecting flange 104 parallel to the upper plane of the bottom die.

Example 14, referring to fig. 1 to 17, in the present invention, a steel bar mesh prepared in advance is firstly placed into the die system by using the die system, the rubber press plate is provided with arched long strip holes with the number consistent with the number of the longitudinal ribs of the template of the UHPC prefabricated plate, the semicircular groove is overlapped and tightly attached to the steel bar at the corresponding position of the UHPC prefabricated plate, the diameter of the semicircular groove is greater than the nominal diameter of the corresponding steel bar, and the difference is 0.5-1.5 mm; 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-pouring wet joint groove of the UHPC precast slab.

The utility model has the structure that the overhanging reinforcing steel bar slurry sealing system 7; the overhanging steel bar penetrates through the sealing structure, the J-shaped sealing ring sealing unit AJ and the sealing unit BJ; the J-shaped sealing ring is in a round table shape, the outer diameter of the J-shaped sealing ring is slightly smaller than the inner diameter of the sealing structure, the inner diameter of the J-shaped sealing ring is larger than the nominal diameter of the corresponding steel bar, and the difference is 1.0mm to 3.0 mm.

Example 15, referring to fig. 1 to 17, the pneumatic demolding system of the present invention comprises an air groove, an air vent, a sealing combination ring around an inter-steel plate, an air supply joint, an inter-steel plate, a rib bottom steel plate, and UHPC concrete around the rib bottom steel plate; the air groove and the vent holes are both arranged on the steel intermediate plate; the sealing combined ring around the steel intermediate plate, the rib bottom steel plate and the UHPC concrete around the rib bottom steel plate form the pneumatic cavity; one end of the vent hole is connected with the air tank, and the other end of the vent hole is connected with the air source connector.

Example 16, referring to fig. 1 to 17, the present invention comprises a UHPC low-rib precast slab and a forming mold composed of a bottom mold, a side mold and a top mold, the UHPC low-rib precast slab is formed by pouring UHPC concrete, and a steel reinforcement cage is disposed therein, wherein: the bottom die comprises a pedestal and basin-type bottom dies, the basin-type bottom dies are distributed at intervals in the length direction of the pedestal, the length of the basin-type bottom dies is smaller than the width of the pedestal, the bottoms of the basin-type bottom dies are fixedly connected with the pedestal in a closed manner, rib bottom grooves are formed between adjacent basin-type bottom dies, rib plates are formed at the corresponding positions of the UHPC low-rib precast slabs and the rib bottom grooves, the bottom surface of the rib plate is provided with a rib bottom steel plate, a plurality of studs are welded on the rib bottom steel plate, the studs are poured in the UHPC short rib precast slab, an air groove and a vent hole which penetrates through the pedestal and is communicated with the air groove are arranged at the rib bottom groove on the pedestal, the width of the rib bottom steel plate is equivalent to that of the rib bottom groove, the length of the rib bottom steel plate is less than that of the UHPC low rib precast slab, the rib bottom steel plate covers the air groove, and the periphery of the rib bottom steel plate is hermetically connected with the pedestal through a sealant, UHPC concrete covers two ends of the rib bottom steel plate, and the vent holes are connected with a high-pressure air source through high-pressure air pipes.

The vent hole is positioned at one side of the air groove, and the vent hole is communicated with the air groove through the vent groove.

The high-pressure air source comprises an air compressor and a high-pressure air tank connected with the air compressor, wherein the high-pressure air tank is connected with a main pipeline, and the main pipeline is respectively connected with each vent hole through branch hoses.

The branch hose is a transparent pipe.

Example 17, with reference to figures 1-2,

the pneumatic demoulding process method comprises the following steps:

1) connecting a pedestal hose and closing a pedestal main valve;

2) then, the air compressor (the air compressor or a relief valve of the air tank is opened, and the air compressor is automatically started) and the main valve of the air tank are opened, so that the pressure in the air tank reaches 0.8 Mpa.

3) The main valve of the corresponding pedestal is quickly opened, and high-pressure gas is discharged from the pore channel at one time to separate the precast slab from the pedestal.

4) And (5) checking whether gaps exist between the periphery of the prefabricated plate and the pedestal or not, and if the local area is not separated, detecting that the prefabricated plate is not separated. Closing a main valve of the pedestal, reserving the hose in the area, and pulling out other areas; repeating the above operation, and performing secondary air pressure demoulding on the area.

5) After the mold is removed, the main valve of the pedestal is closed, and the hose is pulled out.

Claims

1. The utility model provides a mould system of short rib bridge floor precast slab of UHPC, characterized by: the mould includes die block (31), founds mould (32) and groove mould (33), the cross section that is equipped with convex surface and convex surface on groove mould (33) is trapezoidal, and the combination forms the rib kerve between two liang of convex surfaces, the width of groove mould (33) upper end is less than the width of groove mould (33) lower extreme, die block (31) are connected all around and are found mould (32) and constitute the mould groove, groove mould (33) are in the mould inslot and do not with found mould (32) and be connected and with found mould (32) and keep relative distance, the upper end height of groove mould (33) is less than the height of founding mould (32).

2. A die system for a prefabricated slab of UHPC short-ribbed bridge deck according to claim 1, wherein: the edge of the bottom die (31) is a convex bottom die convex edge (312), and one side of the vertical die (32) close to the bottom die (31) is provided with a groove matched with the bottom die convex edge (312) on the edge of the bottom die (31), so that the periphery of the bottom die (31) is hermetically matched with the vertical die (32).

3. A die system for a prefabricated slab of UHPC short-ribbed bridge deck according to claim 1, wherein: the vertical mold (32) comprises a transverse vertical mold I (321), a vertical mold I (322), a transverse vertical mold II (323) and a vertical mold II (324), the transverse vertical mold I (321) and the transverse vertical mold II (323) are arranged in parallel, and the vertical mold I (322) and the vertical mold II (324) are arranged in parallel; the transverse vertical mold I (321), the transverse vertical mold II (323), the vertical mold I (322) and the vertical mold II (324) are respectively provided with a groove matched with the bottom mold convex edge (312) at the outer edge of the bottom mold (31), and the grooves of the transverse vertical mold I (321), the transverse vertical mold II (323), the vertical mold I (322) and the vertical mold II (324) are respectively installed on the bottom mold convex edge (312) at the outer edge of the bottom mold (31) in a matched mode.

4. A die system for a prefabricated slab of UHPC short-ribbed bridge deck according to claim 1, wherein: the mould system further comprises a demoulding system which is combined by a slot mould (33), one or more rib floors (37), UHPC concrete (336) and a compressed air supply system; the groove die (33) is composed of a groove bottom surface (332) and a groove top surface (333) which form a trapezoid cross section, more than two trapezoid cross sections are formed, an air groove (331) is formed in the groove bottom surface (332) and compressed air can be introduced through an air vent (335), rib bottom plates (37) are symmetrically placed and cover the groove bottom surface (332), the length of the rib bottom plates (37) is smaller than that of the groove die (33), after UHPC concrete (336) is prefabricated and poured, the groove bottom surface (332), the rib bottom plates (37) and the UHPC concrete (336) at two ends of the rib bottom plates (37) in the length direction form an air-powered cavity, after the UHPC concrete is prefabricated and reaches the strength, the air vent (335) supplies compressed air to support the rib bottom plates (37), and after an adhesive layer between the groove top surface (333) and the UHPC concrete is broken, the UHPC precast slabs are separated from the groove die (33).

5. A die system for a UHPC short rib deck precast slab according to claim 4, wherein: the rib bottom grooves are provided with air grooves (331) and can be filled with air, and the rib bottom plates (37) are placed on and cover the grooving surfaces of the air grooves (331), so that the rib bottom plates (37) and the air grooves (331) form pneumatic cavities.

6. A mould system for a prefabricated slab of UHPC short-ribbed deck according to claim 1 or 2 or 3 or 4 or 5, characterised in that: the die also comprises a die support (35), and the bottom die (31) is installed on the upper part of the die support (35) in a plane manner; the die support (35) comprises a rib-direction section steel (351), a cantilever support section steel (352), a section steel connecting plate (353) and a die frame support leg; the rib-wise profile steel (351) is arranged below the bottom die (31), a profile steel connecting plate (353) is arranged on each formwork support leg, the profile steel connecting plate (353) is connected with the rib-wise profile steel (351) through cantilever support profile steel (352), the rib-wise profile steel (351) is erected on two corresponding cantilever support profile steel (352), and the formwork support legs are fixedly connected with the ground; the forward rib-direction section steel (351), the cantilever support section steel (352) and the formwork support leg form a door-shaped framework.

7. A die system for a prefabricated slab of UHPC short-ribbed bridge floor according to claim 6, characterized in that: the position range of the cantilever support section steel (352) arranged on the section steel connecting plate (353) is between the center vertical line of the formwork support leg and the center vertical line of the section steel connecting plate (353).

8. A mould system for a prefabricated slab of UHPC short-ribbed deck according to claim 1 or 2 or 3 or 4 or 5, characterised in that: the vertical die (32) further comprises a box groove die, and the box groove die comprises a box bottom plate, a box front vertical plate, a box rear vertical plate and a box side vertical plate; a sealing structure is arranged on one side face of the vertical plate in front of the box; the box back vertical plate is provided with a through hole corresponding to the position of the steel bar and a screw hole for connecting, installing and fixing.

9. A mould system for a prefabricated slab of UHPC short-ribbed deck according to claim 1 or 2 or 3 or 4 or 5, characterised in that: the vertical die (32) further comprises a rubber groove die (341), and the rubber groove die (341) comprises a rubber pressing plate (3411) and a supporting box frame (3412); and the rubber pressing plate (3411) is provided with an arched long strip hole.

10. A die system for a prefabricated slab of UHPC short-ribbed deck according to claim 9, wherein: the arched door-shaped long strip hole comprises a semicircular groove (34111) and a rectangular groove (34112); the semicircular groove (34111) and the rectangular groove (34112) can mutually form an arched long slotted hole.