CN217326018U - UHPC prefabricated plate and laminated floor slab comprising same - Google Patents

Abstract

The application relates to the technical field of building engineering, in particular to a UHPC prefabricated slab and a laminated floor slab comprising the same. Wherein the UHPC preformed sheet comprises: the UHPC prefabricated slab comprises a UHPC prefabricated slab body, wherein at least one reinforcing rib is convexly arranged on the upper surface of the UHPC prefabricated slab body, and the reinforcing rib extends along the length direction of the UHPC prefabricated slab body; and the steel bar mesh and the UHPC precast slab body are cast into a whole. The prefabricated plate with high rigidity and high structural strength is formed by fully utilizing the characteristics of high strength, high toughness and high durability of the UHPC, and is suitable for large-scale industrial production; the UHPC prefabricated plate is used as a prefabricated layer of the laminated floor slab and provides: the cast-in-place concrete floor formwork has the advantages that the cast-in-place concrete floor formwork is used as a formwork of a cast-in-place layer, the reinforcing steel bars of the floor slab are distributed, and the smooth surface is provided, an additional formwork is not needed when concrete is cast in place, and the using amount of the reinforcing steel bars of the cast-in-place layer can be reduced, so that complicated field engineering can be reduced, the structural strength is improved, the construction speed is increased, the construction period is shortened, and the construction difficulty is reduced.

Description

UHPC prefabricated plate and composite floor slab comprising same

Technical Field

The application relates to the technical field of building engineering, in particular to a UHPC prefabricated slab and a laminated floor slab comprising the same.

Background

The floor slab is one of the main components of the building structure, and the structural form and the advanced degree of the technology directly influence the quality, the manufacturing cost and the construction period of the project.

Currently, the floor slabs mainly include cast-in-place reinforced concrete slabs, precast concrete slabs, profiled steel sheet-concrete composite floor slabs, steel bar truss floor support plates (including detachable and non-detachable bottom moulds), laminated floor slabs and the like. Although the cast-in-place reinforced concrete slab has higher integral strength, a large amount of complex site template engineering, reinforcing steel bar engineering and concrete engineering are required, so that the construction speed is low, the construction period is long, the labor cost is high, and the industrial production is difficult to realize; although the concrete precast slab has high construction speed, the integral rigidity of the floor slab is poor, and the problems of seepage prevention, leakage resistance and the like exist; the profiled steel sheet-concrete composite floor slab has high overall rigidity, does not need a formwork, but has high manufacturing cost, and the profiled steel sheet needs fire prevention treatment, has uneven bottom and often needs ceiling treatment; the steel bar truss floor support plate realizes mechanical production, is beneficial to reducing field engineering quantity and accelerating construction speed, and has the defects of inconvenient transportation, easy damage and the like.

The composite floor slab has the advantages of both prefabricated floor slab and cast-in-place floor slab, and is a good floor slab for high-rise and earthquake-resistant buildings. The laminated floor slab is formed by laminating precast slabs and cast-in-place reinforced concrete layers, the precast slabs are usually thin plates, and reinforcing steel bars are required to be arranged in the cast-in-place concrete layers to form enough strength. The above technique has at least the following disadvantages: 1. the prefabricated slab has small rigidity and lower strength; 2. the binding of the reinforcing steel bars on site is complicated, so that the construction speed is low; and 3, the laminated floor slab is large in overall thickness and heavy in weight, and equipment pipelines are not easy to lay and disassemble.

SUMMERY OF THE UTILITY MODEL

Aiming at the defects of the prior art, the application aims to provide the UHPC precast slab and the laminated floor slab comprising the same, and aims to provide the precast slab which has the advantages of high rigidity, good integrity, small plate thickness and convenience in laying of equipment pipelines by fully utilizing the characteristics of ultrahigh mechanical property and ultrahigh durability of the UHPC and combining the structural design of the precast slab.

A first aspect of the application provides a UHPC pre-sheet comprising:

the UHPC precast slab body comprises a first plate surface, a second plate surface and two long side edges, wherein the first plate surface and the second plate surface are oppositely arranged, and the two long side edges are connected with the first plate surface and the second plate surface and are oppositely arranged;

the reinforcing rib is arranged on the first plate surface in a protruding mode and extends along the length direction of the UHPC prefabricated plate body;

and the steel bar mesh and the UHPC precast slab body are cast into a whole.

In a possible implementation of the first aspect of the present application, the mesh of reinforcing bars includes longitudinal reinforcing bars and transverse reinforcing bars, the number of the longitudinal reinforcing bars matches with the number of the reinforcing bars, and the longitudinal reinforcing bars are correspondingly arranged below the reinforcing bars.

In one possible implementation of the first aspect of the present application, the thickness of the UHPC prefabricated slab body is greater than or equal to 35mm, and the thickness range of the reinforcing rib is 40-100 mm.

In one possible implementation of the first aspect of the present application, the reinforcing bar includes:

the first bevel edge and the long side edge are correspondingly arranged, and an inclination angle is formed between the first bevel edge and a vertical line of the first plate surface;

the second bevel edge is arranged opposite to the first bevel edge, and an inclination angle is formed between the second bevel edge and a vertical line of the first plate surface; and the number of the first and second groups,

the upper surface is connected with the first bevel edge and the second bevel edge, the upper surface is parallel to the first plate surface, and the distance between the first bevel edge and the second bevel edge gradually decreases from the first plate surface to the upper surface;

wherein the width of the upper surface is more than or equal to 40 mm.

In one possible implementation of the first aspect of the present application, the reinforcing rib is provided with at least one threading hole.

In a possible implementation of the first aspect of the present application, the number of the threading holes is two, and the two threading holes are symmetrically disposed at positions where the reinforcing ribs are close to the end portions.

In a possible implementation of the first aspect of the present application, a plurality of connection grooves are disposed at intervals at a boundary between the first board surface and the long side, notches of the connection grooves face the long side, and widths of the notches of the connection grooves are smaller than widths of inner grooves of the connection grooves;

when the two UHPC prefabricated plates are spliced, the corresponding two connecting grooves are communicated to form a splicing groove, and the two UHPC prefabricated plates are relatively fixed by clamping a connecting piece into the splicing groove.

In one possible implementation of the first aspect of the present application, the thickness of the UHPC prefabricated slab body is 40mm, the width of the UHPC prefabricated slab body is 600mm, the number of the reinforcing ribs is one, and the reinforcing ribs are disposed in the middle of the first slab surface.

In one possible implementation of the first aspect of the present application, the thickness of the UHPC prefabricated slab body is 40mm, the width of the UHPC prefabricated slab body is 1200mm, the number of the reinforcing ribs is two, and the two reinforcing ribs are uniformly arranged on the first slab surface at intervals.

A second aspect of the present application provides a UHPC prefabricated slab, which includes the UHPC prefabricated slab of the first aspect and a cast-in-place layer, wherein the cast-in-place layer is disposed above the first slab surface, and the thickness of the cast-in-place layer is matched with the thickness of the reinforcing ribs.

The beneficial effects of the utility model reside in that:

1. the characteristics of ultrahigh durability and ultrahigh mechanical property of the UHPC are fully utilized to form the UHPC prefabricated slab with high rigidity, high bearing capacity and good integrity;

2. the steel bar net is arranged in the prefabricated slab, so that the strength of the prefabricated slab is further improved, and the steel bar consumption of a cast-in-place layer can be reduced, the construction speed is improved, and the construction period is shortened when the UHPC prefabricated slab is used for a laminated floor slab;

3. the reinforcing ribs and the UHPC precast slab body can resist external load together, so that the thickness and gravity of the precast slab can be reduced while the strength and toughness of the precast slab are ensured;

the UHPC precast slabs can be used as formworks for cast-in-place layers, thereby saving a large amount of complicated on-site formwork engineering.

Drawings

FIG. 1 shows a schematic structural diagram of a UHPC preform slab, according to some embodiments of the present application;

FIG. 2 shows a cross-sectional view of a UHPC pre-fabricated sheet, according to some embodiments of the present application;

FIG. 3 illustrates a dimension map of a UHPC preform according to some embodiments of the present application;

FIG. 4 illustrates a schematic structural view of one embodiment of a reinforcing bar, according to some embodiments of the present application;

FIG. 5 shows a schematic structural diagram of a first form of construction of a UHPC precast slab unit, according to some embodiments of the present application;

FIG. 6 is a schematic structural diagram illustrating a second structural form of a UHPC precast slab unit according to some embodiments of the present application;

FIG. 7 shows a schematic structural view of a UHPC prefabricated panel comprising a mosaic construction, according to some embodiments of the present application;

FIG. 8 illustrates a schematic structural view of a first implementation of a splice structure, according to some embodiments of the present application;

FIG. 9 illustrates a partial enlarged view of portion A of FIG. 8, according to some embodiments of the present application;

FIG. 10 illustrates a schematic structural view of a second implementation of a splice structure, according to some embodiments of the present application;

FIG. 11 illustrates a partial enlarged view of portion B of FIG. 10, according to some embodiments of the present application;

FIG. 12 shows a schematic structural view of a third embodiment of a mosaic construction, according to some embodiments of the present application;

FIG. 13 illustrates a partial enlarged view of section C of section 12, according to some embodiments of the present application;

fig. 14 shows a schematic structural view of a laminated floor slab incorporating UHPC prefabricated panels, according to some embodiments of the present application.

Detailed Description

The technical features and advantages of the present application are described in more detail below with reference to the accompanying drawings so that the advantages and features of the present application can be more easily understood by those skilled in the art, and thus the scope of the present invention is more clearly and clearly defined.

It should be noted that in the description of the present application, the terms of direction or positional relationship indicated by the terms "upper", "lower", "left", "right", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, which are only for convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.

The terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or to implicitly indicate the importance of the technical features shown.

Furthermore, it should be noted that, unless explicitly stated or limited otherwise, the terms "mounted," "connected," and "connected" in the description of the present application are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

Embodiment 1 of the application provides a UHPC prefabricated plate, adopts UHPC as the base material to at inside integrative pouring reinforcing bar net piece as the skeleton, improved the rigidity and the bearing capacity of prefabricated plate greatly.

To achieve the above purpose, the basic idea of the embodiment of the present application is as follows:

a UHPC prefabricated panel 100, see fig. 1-3, comprising:

the UHPC prefabricated plate body 110 comprises a first plate surface 111 and a second plate surface 112 which are oppositely arranged, and two long side edges 113 which are connected with the first plate surface 111 and the second plate surface 112 and are oppositely arranged;

at least one reinforcing rib 120, wherein the reinforcing rib 120 is convexly arranged on the first plate surface 111, and the reinforcing rib 120 extends along the length direction of the UHPC prefabricated plate body 110;

the reinforcing mesh sheet 130, the reinforcing mesh sheet 130 and the UHPC prefabricated slab body 110 are cast into a whole.

In the embodiment of the application, both the body 110 of the UHPC precast slab and the reinforcing ribs 120 are made of UHPC materials, the UHPC (Ultra-high performance Concrete, UHPC for short) is Ultra-high performance Concrete, also called as reactive powder Concrete, and is an Ultra-high strength cement-based engineering material with high strength, high toughness and low porosity, which is designed according to the tight packing theory, by improving the fineness and activity of the components, the defects (pores and microcracks) in the material are reduced, so that the Ultra-high durability and the Ultra-high mechanical properties (compressive strength, tensile strength and high toughness) are obtained, the ultimate compressive strength can reach 120-180 MPa, and compared with the traditional Concrete material, the Ultra-high performance of the UHPC is particularly suitable for large span and thin-wall structures. In the embodiment of the application, the UHPC is used as the base material to manufacture the precast slab, the ultrahigh mechanical property of the UHPC material is fully utilized, and the rigidity and the bearing capacity of the precast slab are improved.

Further, the embodiment of the utility model provides a through set reinforcing bar net piece 130 in the inside of UHPC prefabricated plate body 110, further improve the intensity of prefabricated plate on the one hand, on the other hand, during the field installation, can reduce the reinforcing bar quantity on cast-in-place layer to construction speed has been improved, construction cycle has been shortened.

Additionally, the utility model discloses UHPC prefabricated plate 100 of embodiment, through protruding strengthening rib 120 of establishing at the first face 111 of UHPC prefabricated plate body 110, first face 111 is the upper surface when the in-service use, and UHPC prefabricated plate body 110 can resist external load with strengthening rib 120 jointly to when the intensity and the temper of reinforcing prefabricated plate, can reduce prefabricated plate thickness and weight, reduce its cost. The second panel 112 of the body 110 of the UHPC prefabricated panel is a lower surface in actual use for providing a flat surface.

Referring to fig. 1 to 3, the reinforcing mesh 130 includes longitudinal reinforcing bars 131 and transverse reinforcing bars 132, and the longitudinal reinforcing bars 131 may extend out of the UHPC prefabricated panel body 110 in the length direction to form a rib structure on the side of the panel for connecting a wall or a beam when being installed; the transverse reinforcing bars 132 correspond to the width of the UHPC prefabricated panel body 110, and no rib structure is formed on the long side 113 to facilitate the splicing of a plurality of UHPC prefabricated panels 100 in the width direction.

In some preferred embodiments, the number of longitudinal rebars 131 may match the number of reinforcing bars 120, and the longitudinal rebars 131 are disposed under the reinforcing bars 120 for reinforcing the longitudinal structural strength of the reinforcing bars 120. Since the UHPC prefabricated panel body 110 itself has ultra-high strength, the amount of reinforcing steel bars used can be minimized. The distance between two adjacent transverse reinforcing steel bars 132 can be set between 20 and 40cm, and the diameter of the longitudinal reinforcing steel bars 131 can be larger than that of the transverse reinforcing steel bars 132, so that the UHPC prefabricated slab 100 can provide enough strength.

Further, the body 110 of the UHPC prefabricated panel is integrally formed with the reinforcing ribs 120. By integrally molding the main body 110 of the UHPC prefabricated slab and the reinforcing ribs 120, on one hand, the connection strength between the main body 110 of the UHPC prefabricated slab and the reinforcing ribs 120 can be improved, and on the other hand, the UHPC prefabricated slab 100 can be molded in a mold, which is beneficial to improving the production efficiency. Of course, in other embodiments, the UHPC prefabricated panel body 110 and the reinforcing ribs 120 may be formed separately and then connected.

Further, referring to FIG. 2, the thickness D1 of the UHPC precast slab body 110 is more than or equal to 35 mm; the thickness D2 of the reinforcing ribs 120 ranges from 40mm to 100 mm. It will be appreciated that the strength of the prefabricated panel can be increased by increasing the thickness D1 of the UHPC prefabricated panel body 110, but the manufacturing cost of the prefabricated panel is also increased; in the embodiment of the present application, the reinforcing ribs 120 are provided, and the reinforcing ribs 120 can enhance the compressive strength of the UHPC prefabricated panels 100, so that the thickness D1 of the body 110 of the UHPC prefabricated panels can be reduced as much as possible, and in order to ensure that sufficient strength is provided and to accommodate the reinforcing mesh 130, the thickness D1 of the body 110 of the UHPC prefabricated panels in the embodiment of the present application is at least 35 mm. In addition, the compressive strength of the UHPC prefabricated slab 100 can be enhanced by increasing the thickness D2 and the width of the reinforcing ribs 120, and the applicant sets the thickness D2 of the reinforcing ribs 120 to be between 40 and 100mm in comprehensive consideration of the strength and the cost.

In some possible embodiments, referring to fig. 4, the reinforcing rib 120 may include:

a first side edge 121, the first side edge 121 being disposed corresponding to the long side edge 113 of the UHPC prefabricated panel body 110;

a second side edge 122, the second side edge 122 being disposed opposite the first side edge 121; and the number of the first and second groups,

the upper surface 123, the upper surface 123 connects the first side edge 121 and the second side edge 122, and the upper surface 123 is parallel to the first plate surface 111.

The first side edge 121 and the second side edge 122 are perpendicular to the first plate surface 111, and the cross section of the reinforcing rib 120 is square, so that the width L2 of the reinforcing rib 120 is not less than 50mm to fully ensure the strength of the prefabricated plate. It is understood that increasing the width L2 of the reinforcing beads 120 can increase the compressive strength of the UHPC prefabricated sheet 100, but increases the material cost, and the applicant sets the width L2 of the reinforcing beads 120 to not less than 50mm, considering the strength and cost together.

Alternatively, in some preferred embodiments, referring to fig. 2, the reinforcing rib 120 includes:

a first inclined edge 121, wherein the first inclined edge 121 is arranged corresponding to the long side 113 of the UHPC prefabricated plate body 110, and an included angle alpha is formed between the first inclined edge 121 and the vertical line of the first plate surface 111;

a second oblique edge 122, wherein the second oblique edge 122 is arranged opposite to the first oblique edge 121, and an included angle β is formed between the second oblique edge 122 and a vertical line of the first board surface 111;

an upper surface 123, the upper surface 123 connects the first inclined edge 121 and the second inclined edge 122, and the upper surface 123 is parallel to the first plate surface 111; the distance between the first inclined edge 121 and the second inclined edge 122 gradually decreases from the first plate surface 111 to the upper surface 123.

Two long side edges of the reinforcing rib 120 are set to be oblique edges, so that the width of the reinforcing rib 120 is gradually reduced from the first plate surface 111 to the upper surface 123, and on one hand, the demolding of the reinforcing rib 120 is facilitated; on the other hand, the coupling strength between the reinforcing beads 120 and the UHPC prefabricated panel body 110 can be improved. Preferably, α = β =45 °, the cross section of the rib 120 is in an isosceles trapezoid structure. The width L2 of the upper surface 123 is more than or equal to 40mm, and the compression strength of the precast slab can be fully ensured through the arrangement.

In some possible embodiments, referring to fig. 1, at least one threading hole 140 may be further disposed on the reinforcing rib 120, and the threading hole 140 is used for laying an electromechanical pipeline, so as to solve the problem that the existing composite floor slab is inconvenient for laying the pipeline.

In some preferred embodiments, the number of the threading holes 140 may be two, and two threading holes 140 are symmetrically disposed near both ends of the reinforcing bar 120, respectively. On one hand, the threading holes 140 can be used for laying pipelines, and on the other hand, when the cable is installed on site, the UHPC prefabricated slab 100 can be hoisted through the two threading holes 140.

In the embodiment of the present application, in order to facilitate industrial production, the applicant manufactures the UHPC prefabricated panels 100 into modular units of standard sizes according to calculation and test results.

Referring to fig. 5, a first structural form of a UHPC precast slab unit in the embodiment of the present application is shown: the thickness D1 of the UHPC prefabricated panel body 110 was set to 40mm, and the width L1 thereof was set to 600 mm; the number of the reinforcing ribs 120 is one, and the reinforcing ribs 120 are convexly arranged in the middle of the first plate surface 111; the reinforcing mesh 130 is integrally cast with the UHPC prefabricated slab body 110, the reinforcing mesh 130 comprises a longitudinal reinforcing bar 131 and a plurality of transverse reinforcing bars 132, and the longitudinal reinforcing bar 131 is correspondingly arranged below the reinforcing bars 120.

Referring to fig. 6, a second structural form of a UHPC precast slab unit in the embodiment of the present application is shown: the thickness D1 of the UHPC prefabricated panel body 110 is set to 40mm, and the width L1 thereof is set to 1200 mm; the number of the reinforcing ribs 120 is two, and the two reinforcing ribs 120 are uniformly arranged on the first plate surface 111 at intervals; the steel bar mesh 130 and the UHPC prefabricated slab body 110 are integrally poured, the steel bar mesh 130 comprises two longitudinal steel bars 131 and a plurality of transverse steel bars 132, and the two longitudinal steel bars 131 are respectively arranged below the two reinforcing ribs 120.

When in use, the two UHPC prefabricated plate units can be selected for use according to the installation size of a building; two kinds of prefabricated slab units can meet the use requirements of most buildings.

In some preferred embodiments, a connecting structure 150 may be further disposed at an edge of the body 110 of the UHPC prefabricated panel, and when two UHPC prefabricated panels 100 are spliced, the two UHPC prefabricated panels 100 are relatively fixed by the connecting structure 150, so as to improve the connection strength between the two UHPC prefabricated panels.

For example, referring to fig. 7, the connection structure may be a plurality of connection grooves 150 arranged at intervals along the length direction, the connection grooves 150 are arranged at the junction of the first plate surface 111 and the long side 113, the notches of the connection grooves 150 face the long side 113, and the width of the notches of the connection grooves 150 is smaller than the width of the internal grooves thereof, when two UHPC prefabricated plates 100 are spliced, two connection grooves 150 at corresponding positions are communicated through the notches to form a spliced groove, and a connection member 200 is clamped in the spliced groove to realize the connection and fixation of the two UHPC prefabricated plates 100.

Referring to FIGS. 8-9, a first embodiment of the present application is shown in which two UHPC prefabricated sheets 100 are assembled:

the connecting groove 150 is a trapezoidal groove structure, a plurality of trapezoidal grooves are arranged at the junction of the first plate surface 111 and the long side 113 at intervals, the notches of the trapezoidal grooves face the long side 113, and the width of the notches of the trapezoidal grooves is smaller than that of the grooves inside the trapezoidal grooves; correspondingly, the connecting member 200 includes a first connecting portion 210 and a second connecting portion 220 which are respectively configured in a trapezoid shape, the first connecting portion 210 is fixedly connected with the second connecting portion 220 or integrally configured, when the first UHPC prefabricated panel 100a and the second UHPC prefabricated panel 100b are spliced, the two corresponding trapezoid-shaped grooves are communicated to form a splicing groove 160, the cross-sectional shape of the connecting member 200 is matched with the splicing groove 160, the connecting member 200 is clamped in the splicing groove 160, because the width of the notch of the trapezoid-shaped groove is smaller than the width of the inner groove, after the connecting member 200 is clamped in the splicing groove 160, the connecting member 200 abuts against the side groove wall of the connecting groove 150 to relatively fix the first UHPC prefabricated panel 100a and the second UHPC prefabricated panel 100 b.

Referring to FIGS. 10-11, a second embodiment of the present application is shown in which two UHPC prefabricated panels 100 are assembled:

the connecting groove 150 is a T-shaped groove structure, a plurality of T-shaped grooves are arranged at intervals at the junction of the first plate surface 111 and the long side 113, and the notches of the T-shaped grooves face the long side 113; correspondingly, the connecting member 200 includes a first connecting portion 210, a second connecting portion 220, and a third connecting portion 230 connecting the first connecting portion 210 and the second connecting portion 220, when the first UHPC prefabricated panel 100a and the second UHPC prefabricated panel 100b are spliced, two T-shaped slots are communicated to form a splicing slot 160, the cross-sectional shape of the connecting member 200 is matched with the splicing slot 160, the connecting member 200 is clamped into the splicing slot, the first connecting portion 210 and the second connecting portion 220 are respectively clamped into the transverse edges 151a and 151b of the two T-shaped slots, the third connecting portion 230 is clamped into the communication longitudinal edges 152a and 152b of the two T-shaped slots, and the connecting member 200 abuts against the side walls of the transverse edges 151a and 151b to relatively fix the first UHPC prefabricated panel 100a and the second UHPC prefabricated panel 100 b.

Please refer to fig. 12-13, which illustrate a third embodiment of the connection structure in the embodiment of the present application:

the connecting groove 150 includes a circular groove portion and a communicating portion, the circular groove portion is communicated with the communicating portion, the communicating portion is smaller than the circular groove portion in size, and the communicating portion is provided with an opening toward the long side 113; correspondingly, the connecting member 200 includes a first connecting portion 210, a second connecting portion 220 and a third connecting portion 230 connecting the first connecting portion 210 and the second connecting portion 220, wherein the first UHPC prefabricated panel 100a and the second UHPC prefabricated panel 100b are arranged in a substantially circular shape, when the first UHPC prefabricated panel 100a is spliced with the second UHPC prefabricated panel 100b, the two connecting slots 150 are communicated to form a spliced slot 160, the cross-sectional shape of the connecting member 200 is matched with that of the spliced slot 160, the first connecting portion 210 and the second connecting portion 220 are respectively clamped into the two circular slot portions 151a and 151b, the third connecting portion 230 is clamped into the two communicated communicating portions 152a and 152b, and the connecting member 200 abuts against the slot walls of the circular slot portions 151a and 151b to relatively fix the first UHPC prefabricated panel 100a and the second UHPC prefabricated panel 100 b.

Preferably, the joining member 200 may be a metal member, such as steel, to improve the strength of the joint between two UHPC prefabricated panels.

Embodiment 2 of the present application provides a composite floor slab, referring to fig. 14, the composite floor slab includes the UHPC prefabricated slab 100 of embodiment 1 and a cast-in-place layer 300, the cast-in-place layer 300 is disposed above the first slab surface 110, and the thickness of the cast-in-place layer 300 is equal to the thickness of the reinforcing rib 120.

In some embodiments, the cast-in-place layer 300 may be a concrete layer, and when the thickness of the UHPC prefabricated panel body 110 is set to be thick enough, the cast-in-place layer 300 does not need reinforcement because the UHPC prefabricated panel 100 can provide enough strength, thereby reducing the on-site reinforcement work, but this may increase costs moderately.

In addition, when the UHPC prefabricated slab is installed on site, the UHPC prefabricated slab 100 can be used as a template of a cast-in-place layer 300, so that the on-site template engineering is omitted, and the on-site construction workload and the construction difficulty are reduced.

Or, in some preferred embodiments, the cast-in-place layer 300 may be a reinforced concrete layer, and the cast-in-place layer 300 has a proper amount of reinforcing bars, so that the thickness of the UHPC prefabricated slab body 110 can be reduced properly, and compared with the conventional concrete prefabricated slab, the UHPC prefabricated slab 100 according to the embodiment of the present invention has higher strength and rigidity at the same thickness, and therefore, the amount of reinforcing bars in the cast-in-place layer 300 can be reduced to the maximum extent under the condition of the same thickness, thereby reducing the workload of on-site reinforcing bar operation. The thickness of the body 110 of UHPC prefabricated panels need not be too thick at this time, so that both strength and cost are taken into consideration.

The construction principle of this embodiment is: after a plurality of UHPC prefabricated panels 100 are hung on a wall or a beam, the plurality of UHPC prefabricated panels 100 are transversely spliced to form a prefabricated layer, a first panel 111 of the UHPC prefabricated panels 100 is used as an upper surface to provide a bottom die for on-site casting, and a second panel 112 is used as a lower surface to provide a flat surface; because the UHPC precast slab 100 provides enough strength, the reinforcement amount of a cast-in-place layer can be reduced, the field reinforcement workload is reduced, and the construction period is shortened; the thickness of the cast-in-place layer 300 is flush with that of the reinforcing rib 120, and during field operation, the reinforcing rib 120 provides a side mold for field casting, so that field template engineering is omitted, and the floor can be used after the cast-in-place concrete layer is solidified and formed. The coincide floor of this application embodiment has that the bulk strength is higher, construction speed is fast, construction cycle is short and cost of labor low grade advantage.

In the description herein, references to the description of the terms "some embodiments," "exemplary," "example," "preferred," or "further" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The above description is only an example of the present application and is not intended to limit the scope of the present application, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present application.

Claims (10)

1. A UHPC prefabricated panel (100), comprising:

the UHPC prefabricated plate body (110) comprises a first plate surface (111) and a second plate surface (112) which are oppositely arranged, and two long side edges (113) which are connected with the first plate surface (111) and the second plate surface (112) and are oppositely arranged;

the reinforcing rib (120) is arranged on the first plate surface (111) in a protruding mode, and the reinforcing rib (120) extends along the length direction of the UHPC prefabricated plate body (110);

and the reinforcing steel bar mesh (130) is integrally cast with the UHPC precast slab body (110).

2. A UHPC pre-fabricated slab (100) according to claim 1, in which the mesh of reinforcement bars (130) comprises longitudinal reinforcement bars (131) and transverse reinforcement bars (132), the number of the longitudinal reinforcement bars (131) matching the number of the reinforcement bars (120), and the longitudinal reinforcement bars (131) being arranged correspondingly under the reinforcement bars (120).

3. The UHPC prefabricated slab (100) as claimed in claim 2, wherein the thickness of the UHPC prefabricated slab body (110) is more than or equal to 35mm, and the thickness range of the reinforcing ribs (120) is 40-100 mm.

4. A UHPC pre-fabricated sheet (100) according to claim 3, characterised in that said reinforcing ribs (120) comprise:

the first inclined edge (121), the first inclined edge (121) and the long side edge (113) are correspondingly arranged, and an inclination angle is formed between the first inclined edge (121) and a vertical line of the first plate surface (111);

a second oblique side (122), the second oblique side (122) being arranged opposite to the first oblique side (121), the second oblique side (122) forming an oblique angle with a vertical line of the first plate surface (111); and the number of the first and second groups,

an upper surface (123), the upper surface (123) connecting the first oblique edge (121) and the second oblique edge (122), the upper surface (123) being parallel to the first plate surface (111), and a distance between the first oblique edge (121) and the second oblique edge (122) gradually decreasing from the first plate surface (111) to the upper surface (123);

wherein the width of the upper surface (123) is more than or equal to 40 mm.

5. A UHPC pre-fabricated sheet (100) according to claim 2 in which the reinforcing ribs (120) are provided with at least one threading hole (140).

6. A UHPC prefabricated panel (100) according to claim 5, wherein the number of the threading holes (140) is two, and the two threading holes (140) are symmetrically arranged at the position of the reinforcing rib (120) close to the end part.

7. The UHPC prefabricated panel (100) of claim 2, wherein a plurality of connecting grooves (150) are arranged at intervals at the junction of the first panel surface (111) and the long side edge (113), the notches of the connecting grooves (150) face the long side edge (113), and the width of the notches of the connecting grooves (150) is smaller than the width of the internal grooves thereof;

when the two UHPC prefabricated plates (100) are spliced, the corresponding two connecting grooves (150) are communicated to form a splicing groove (160), and the two UHPC prefabricated plates (100) are relatively fixed by clamping a connecting piece (200) into the splicing groove (160).

8. A UHPC prefabricated panel (100) according to claim 4, characterized in that the thickness of the UHPC prefabricated panel body (110) is 40mm, the width thereof is 600mm, the number of the reinforcing ribs (120) is one, and the reinforcing ribs (120) are arranged at the middle of the first panel surface (111).

9. A UHPC prefabricated panel (100) according to claim 4, characterized in that the thickness of the UHPC prefabricated panel body (110) is 40mm, the width is 1200mm, the number of the reinforcing ribs (120) is two, and the two reinforcing ribs (120) are uniformly arranged on the first panel surface (111) at intervals.

10. A laminated floor slab, characterized in that it comprises a UHPC prefabricated slab (100) according to any one of claims 1 to 9, and a cast-in-place layer (300), said cast-in-place layer (300) being disposed above said first slab surface (111), and the thickness of said cast-in-place layer (300) being matched to the thickness of said reinforcing bars (120).

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