UHPC prefabricated slab, UHPC prefabricated bridge deck slab and prefabricated slab mold

Abstract

The invention relates to a UHPC prefabricated slab, a UHPC prefabricated bridge deck slab and a prefabricated slab mold, and the UHPC prefabricated slab comprises a prefabricated slab body which comprises ultra-high performance concrete and a reinforcing mesh pre-buried in the ultra-high performance concrete; the multiple threaded rods are located on the side wall of the ultra-high performance concrete, and all the threaded rods are partially embedded in the ultra-high performance concrete; a plurality of interface reinforcing steel bars are arranged, and the plurality of interface reinforcing steel bars are partially pre-buried on the side wall of the pre-ultra-high performance concrete in the horizontal direction. The threaded rods and the interface reinforcing steel bars located on the side wall of the prefabricated slab body can increase the contact area of an interface to the maximum extent, the bonding tensile strength and the crack resistance of the interface are improved, and the upper limit of interface cracking is improved. The threaded rod and steel fibers in UHPC have the same effect, meanwhile, the interface scabbling technology is not affected, and the interface strength is improved.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of bridge engineering, in particular to a UHPC prefabricated plate, a UHPC prefabricated bridge deck plate and a prefabricated plate mold. BACKGROUND

[0002] There are wet joints between prefabricated bridge deck plates, which are weak parts between the bridge deck plates, and the interfacial bonding tensile strength between the prefabricated bridge deck plates and the cast-in-situ concrete of the wet joints determines the overall tensile strength of the bridge deck plates. In order to enhance the interfacial bonding tensile strength and improve the interfacial crack resistance, the conventional method is to use hydraulic chiseling to chisel the interface of the prefabricated bridge deck plate to expose the internal rough interface, so as to enhance the connection performance between the interfaces.

[0003] Ultra-high performance concrete (UHPC) is a cement-based composite material mixed with steel fibers, which is increasingly applied to bridge engineering and can be used as a wet joint material or a bridge deck plate material.

[0004] The tensile strength of UHPC depends on the concrete and steel fibers, and the steel fibers of the new and old concrete interfaces are disconnected. Although hydraulic chiseling can expose some steel fibers, the distribution direction and quantity of the steel fibers are weaker than the internal interface of the original concrete, which reduces the tensile strength of the wet joint connection, becomes a weak part of the structure, increases the cracking risk, and results in the bearing capacity and durability of the bridge structure being lower than the designed service life. SUMMARY

[0005] The embodiments of the application provide a UHPC prefabricated plate, a UHPC prefabricated bridge deck plate and a prefabricated plate mold to solve the problem of low interfacial bonding tensile strength between the prefabricated bridge deck plate and the cast-in-situ concrete of the wet joint and high cracking risk in the related art.

[0006] The first aspect of the embodiments of the application provides a UHPC prefabricated plate, comprising: a prefabricated plate body, the prefabricated plate body comprising ultra-high performance concrete and a steel mesh embedded in the ultra-high performance concrete; a threaded rod, the threaded rod being provided with a plurality of rods and located on the side wall of the ultra-high performance concrete, each of the threaded rods being partially embedded in the ultra-high performance concrete; an interface reinforcing steel bar, the interface reinforcing steel bar being provided with a plurality of rods, and the plurality of interface reinforcing steel bars being partially embedded in the side wall of the ultra-high performance concrete in a horizontal direction.

[0007] In some embodiments: the side wall of the prefabricated slab body is provided with protrusions and / or grooves arranged at intervals, and the threaded rods and the interface reinforcing steel bars are arranged on the side wall of the protrusions and / or grooves. In some embodiments: the steel bar mesh comprises transverse steel bars and longitudinal steel bars that are tied to each other, and one end or both ends of the transverse steel bars and / or longitudinal steel bars extend outside the side wall of the ultra-high performance concrete.

[0008] In some embodiments: the length of the threaded rod is 40mm-60mm, the diameter of the threaded rod is 1mm-3mm, and each threaded rod is uniformly arranged on the side wall of the ultra-high performance concrete.

[0009] The threaded rod is provided with threads on the surface, which can tightly grip the concrete, and the threads can increase the contact area between the two.

[0010] In some embodiments: the length of the interface reinforcing steel bar is 120mm-140mm, the diameter of the interface reinforcing steel bar is 6mm-8mm, and each interface reinforcing steel bar is uniformly arranged on the side wall of the ultra-high performance concrete.

[0011] The second aspect of the embodiments of the present application provides a UHPC prefabricated bridge slab, comprising: The UHPC prefabricated slab of any of the above embodiments is laid in multiple pieces, and a wet interface is formed between adjacent two UHPC prefabricated slabs. The wet interface is provided with threaded rods and interface reinforcing steel bars, and the wet interface between adjacent two UHPC prefabricated slabs is connected by a wet joint.

[0012] In some embodiments: the wet joint comprises cast-in-situ ultra-high performance concrete filled in the wet interface between adjacent two UHPC prefabricated slabs, and the cast-in-situ ultra-high performance concrete is added with first fibers. The threaded rods and the interface reinforcing steel bars on the wet interface are all embedded in the cast-in-situ ultra-high performance concrete.

[0013] The third aspect of the embodiments of the present application provides a UHPC prefabricated mold, comprising: The side wall of the side wall template is provided with a plurality of positioning holes for penetrating and positioning the interface reinforcing steel bars; The side wall of the side wall template is provided with a plurality of positioning holes for penetrating and positioning the interface reinforcing steel bars; The threaded rod template comprises a threaded rod positioning plate connected to the inner wall of the side wall template, and a plurality of threaded rods inserted into the threaded rod positioning plate.

[0014] In some embodiments: the side wall template comprises a side wall inner template and a side wall outer template which are arranged at a distance from each other, and the side wall inner template and the side wall outer template are fixedly connected to each other; The side wall of the side wall inner template and the side wall outer template is provided with a positioning hole for penetrating and positioning the interface reinforcing steel bar; The side of the threaded rod positioning plate away from the fiber is fixedly connected to the inner wall of the side wall inner template.

[0015] In some embodiments: the threaded rod positioning plate is any one of foamed plastic, cork board, high-density sponge, asphalt, and rubber.

[0016] The technical scheme provided by the application has the beneficial effects of: The UHPC prefabricated plate, the UHPC prefabricated bridge deck, and the prefabricated plate mold provided by the embodiments of the application have the beneficial effects of:

[0017] Therefore, the threaded rods and the interface reinforcing steel bars are embedded in the side wall of the UHPC prefabricated plate, wherein each threaded rod is partially embedded in the UHPC, and the interface reinforcing steel bars are partially embedded in the side wall of the UHPC in a horizontal direction. The threaded rods and the interface reinforcing steel bars on the side wall of the prefabricated plate can maximize the contact area of the interface, improve the bonding tensile strength and crack resistance of the interface, and improve the upper limit of interface cracking. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the application, the drawings needed in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the application, and other drawings can be obtained by those skilled in the art without creative effort.

[0019] Figure 1 The structure schematic view of two adjacent UHPC prefabricated plates of the embodiments of the application; Figure 2 The partial structure schematic view of the UHPC prefabricated bridge deck of the embodiments of the application; Figure 3 The structure schematic view of the prefabricated plate mold of the embodiments of the application.

[0020] Reference signs: 10, UHPC prefabricated plate; 11, ultra-high performance concrete; 12, steel mesh; 13, threaded rod; 14, interface reinforcing steel bar; 15, groove; 16, convex tooth; 20, wet joint; 21, cast-in-place ultra-high performance concrete; 22, first fiber; 30, side wall formwork; 31, side wall inner formwork; 32, side wall outer formwork; 33, threaded rod positioning plate. DETAILED DESCRIPTION

[0021] To make the objectives, technical solutions, and advantages of the embodiments of the present application clearer, the following will be combined with the accompanying drawings for the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are some but not all of the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative work belong to the scope of protection of the present application.

[0022] The embodiments of the present application provide a UHPC prefabricated plate, a UHPC prefabricated bridge deck, and a prefabricated plate mold, which can solve the problem of low interfacial tensile strength and high cracking risk between the prefabricated bridge deck and the cast-in-place concrete of the wet joint in the related art.

[0023] Referring to Figure 1 The first aspect of the embodiments of the present application provides a UHPC prefabricated plate, and the UHPC prefabricated plate 10 comprises: A prefabricated plate body, the prefabricated plate body comprising an ultra-high performance concrete 11, and a steel mesh 12 embedded in the ultra-high performance concrete 11. The steel mesh 12 comprises transverse steel bars and longitudinal steel bars that are bound to each other, and one end or both ends of the transverse steel bars and / or the longitudinal steel bars protrude outside the side wall of the ultra-high performance concrete 11.

[0024] A threaded rod 13, the threaded rod 13 being provided with a plurality of threaded rods 13 located on the side wall of the ultra-high performance concrete 11, each threaded rod 13 being partially embedded in the ultra-high performance concrete 11 and partially exposed outside the ultra-high performance concrete 11.

[0025] An interface reinforcing steel bar 14, the interface reinforcing steel bar 14 being provided with a plurality of interface reinforcing steel bars 14 that are partially embedded in the side wall of the ultra-high performance concrete 11 in a horizontal direction and partially exposed outside the ultra-high performance concrete 11. The interface reinforcing steel bar 14 is preferably a threaded steel bar.

[0026] The embodiments of the present application embed the threaded rod 13 and the interface reinforcing steel bar 14 on the side wall of the ultra-high performance concrete 11 of the prefabricated plate body, wherein each threaded rod 13 is partially embedded in the ultra-high performance concrete 11, and the plurality of interface reinforcing steel bars 14 are partially embedded in the side wall of the ultra-high performance concrete 11 in a horizontal direction.

[0027] The threaded rods 13 and the interface reinforcing steel bars 14 located on the side walls of the prefabricated slab body can maximize the contact area of the interface, improve the bonding tensile strength and crack resistance of the interface, and improve the upper limit of interface cracking.

[0028] In some optional embodiments, referring to Figure 1 As shown in the figure, the embodiment of the present application provides a UHPC prefabricated slab, the side walls of the prefabricated slab body of the UHPC prefabricated slab 10 are provided with protrusions 16 and grooves 15 arranged at intervals, and the threaded rods 13 and the interface reinforcing steel bars 14 are located on the side walls of the protrusions 16 and the grooves 15. The protrusions 16 and the grooves 15 are used to increase the contact area of the wet joint between the two adjacent spliced UHPC prefabricated slabs 10 and enhance the tensile strength.

[0029] In some optional embodiments, referring to Figure 1 As shown in the figure, the embodiment of the present application provides a UHPC prefabricated slab, the length of the threaded rod 13 of the UHPC prefabricated slab 10 is 40mm~60mm, the diameter of the threaded rod 13 is 1mm ~3mm, and each threaded rod 13 is uniformly arranged on the side wall of the ultra-high performance concrete 11.

[0030] For example, the length of the threaded rod 13 is 40mm, and the diameter is 2mm, 20mm of the length of the threaded rod 13 is embedded in the ultra-high performance concrete 11, and the remaining 20mm is exposed outside the ultra-high performance concrete 11. The number and spacing of the threaded rods 13 per unit area on the side wall of the ultra-high performance concrete 11 are determined according to the situation, and the specific parameters can be determined according to the interface stress.

[0031] The length of the interface reinforcing steel bar 14 is 120mm~140mm, the diameter of the interface reinforcing steel bar 14 is 6mm~8mm, and each interface reinforcing steel bar 14 is uniformly arranged on the side wall of the ultra-high performance concrete 11.

[0032] For example, the length of the interface reinforcing steel bar 14 is 130mm, and the diameter is 6mm, 65mm of the length of the interface reinforcing steel bar 14 is embedded in the ultra-high performance concrete 11, and the remaining 65mm is exposed outside the ultra-high performance concrete 11. The number and spacing of the interface reinforcing steel bars 14 per unit area on the side wall of the ultra-high performance concrete 11 are determined according to the situation, and the specific parameters can be determined according to the interface stress.

[0033] Referring to Figure 1 and Figure 2 As shown in the figure, the second aspect of the embodiment of the present application provides a UHPC prefabricated bridge deck slab, which comprises: The UHPC prefabricated slab 10 in any of the above embodiments is laid on the bridge deck in multiple pieces, and a wet joint interface is formed between adjacent two UHPC prefabricated slabs 10. The wet joint interface of each UHPC prefabricated slab 10 is provided with a threaded rod 13 and an interface reinforcing steel bar 14, and the wet joint interface between adjacent two UHPC prefabricated slabs 10 is connected through a wet joint 20.

[0034] The wet joint 20 includes cast-in-situ ultra-high performance concrete 21 filled in the wet joint interface between adjacent two UHPC prefabricated slabs 10, and a first fiber 22 in a set proportion is added in the cast-in-situ ultra-high performance concrete 21. The threaded rod 13 and the interface reinforcing steel bar 14 on the wet joint interface are both embedded in the cast-in-situ ultra-high performance concrete 21.

[0035] The embodiments of the present application take a certain type of UHPC prefabricated slab 10 as an example for illustration. The thickness of the UHPC prefabricated slab 10 is 170 mm, the size of the protruding tooth 16 or the recess 15 is 400*250 mm, 800 mm is taken along the length direction of the wet joint 20, covering a complete rectangular wet joint 20. The concrete material is all ultra-high performance concrete, and the content of the steel fiber in the ultra-high performance concrete 11 is set to 3%. In an ideal state, the steel fiber is uniformly distributed in the ultra-high performance concrete 11, and the direction is perpendicular to the wet joint interface.

[0036] (1) Under normal circumstances, the tensile strength of the UHPC prefabricated slab 10 without the wet joint is ; the tensile strength provided for the ultra-high performance concrete 11; the tensile strength provided for the steel fiber in the ultra-high performance concrete 11; (2) The tensile strength of the UHPC prefabricated slab 10 with the wet joint interface is ; the tensile strength provided for the joint interface of the UHPC prefabricated slab 10; the tensile strength provided for the steel fiber after the interface is roughened; Generally, , wherein ,

[0037] (3) In order to enhance the tensile strength of the joint interface, the threaded rod 13 and the interface reinforcing steel bar 14 are arranged: At this time, , wherein , , or .

[0038] the tensile strength provided for the steel fiber after the original interface of the UHPC prefabricated slab 10 is roughened; Tensile strength provided for the threaded rod 13; Tensile strength provided for the interface reinforcing steel bar 14.

[0039] At this time, it is necessary to ensure to make up for the deficiency of the wet joint interface and that the interface strength of the UHPC prefabricated slab 10 is not lower than the strength of the normal jointless UHPC prefabricated slab 10. The wet joint interface will not become a weak area of the UHPC prefabricated slab 10 connection, thereby improving the durability of the structure.

[0040] (4) In order to further determine the number of threaded rods 13 or interface reinforcing steel bars 14 at the joint position of the UHPC prefabricated slab 10, the steel fiber content in the original prefabricated slab body is taken as the basis for calculation.

[0041] The steel fiber volume reinforcement ratio in the prefabricated slab body is 3.0%, the diameter is 0.2mm, and the length is 13mm. Assuming that the direction of the steel fiber is perpendicular to the interface and the anchoring is normal, the number of steel fibers in a certain cross section of the ultra-high performance concrete 11 is calculated according to the volume content, which is 129936. Considering the anchoring length and number of steel fibers, an equivalent method is needed to reinforce the interface steel fibers.

[0042] ① If there is no interface reinforcing measure: According to the chiseled interface fiber reinforcement ratio, it is expected to be reduced by 50% or even lower. In this implementation case the steel fiber reinforcement ratio after chiseling is reduced by 35% of , that is, the steel fiber reinforcement ratio is 1.05%. ② If only threaded rods 13 are arranged:

[0043] The threaded rod 13 used is a threaded rod 13 with a diameter of 2mm and a length of 40mm. The threaded rod 13 is optimally arranged at the interface, that is, the direction is perpendicular to the interface, and the anchoring length on both sides is 20mm. If the threaded rod 13 is arranged, the interface can be water chiseled, and the threaded rod 13 is arranged 845. According to the concrete cross-sectional area, the reinforcement ratio of the threaded rod 13 is 1.95%, at this time, =1.05%+1.95%=3.0%. If the threaded rod 13 is arranged and the interface cannot be water chiseled, the tensile strength provided by the original interface chiseled steel fiber , so the number of threaded rods 13 arranged needs to be the same as the steel fiber content in the prefabricated slab body, that is, 1300 are arranged. According to the concrete cross-sectional area, the reinforcement ratio of the threaded rod 13 is 3.0%. At this time, =1.05%+3.0%=4.05%. = 0% + 3.0% = 3.0%, which is the same as the steel fiber reinforcement ratio in the original precast slab body.

[0044] ③ If only interface reinforcing steel bars 14 are arranged: The interface reinforcing steel bars 14 have a diameter of 6 mm, and the number is 94, with a longitudinal and transverse spacing of 40 mm. According to the concrete cross-sectional area, the reinforcement ratio of the interface reinforcing steel bars 14 is 1.95%. At this time, = 1.05% + 1.95% = 3.0%, which is the same as the steel fiber reinforcement ratio in the original precast slab body.

[0045] ④ If both threaded rods 13 and interface reinforcing steel bars 14 are arranged: The threaded rods 13 have a diameter of 2 mm, and the number is 423. According to the concrete cross-sectional area, the reinforcement ratio of the threaded rods 13 is 0.975%. The interface reinforcing steel bars 14 have a diameter of 6 mm, and the number is 47. According to the concrete cross-sectional area, the reinforcement ratio of the interface reinforcing steel bars 14 is 0.975%. At this time, = 1.05% + 0.975% + 0.975% = 3.0%, which is the same as the steel fiber reinforcement ratio in the original precast slab body.

[0046] In the above examples, due to the reduction of the concrete chiseling interface steel fiber and the reduction of the bonding strength of the new and old concrete interface, the number, spacing, and selection of the newly added threaded rods 13 or interface reinforcing steel bars 14 can be adjusted according to the actual situation, with the minimum guarantee of the wet joint interface tensile strength .

[0047] In order to further verify the feasibility and reliability of the above UHPC precast bridge deck slab, an interface bonding tensile test is carried out. The interface bonding tensile strength is the most direct method to evaluate the bonding performance of the new and old concrete interface, and the size of the tensile strength directly affects the key of the new and old concrete interface strength.

[0048] The axial tensile test method is used to study the influence of different interface reinforcing measures on the interface bonding tensile strength. The size of the test specimen is 100x100x500mm, and the test specimen is poured in two times with a pouring interface in the middle. The pouring interface parameters and the tensile results are shown in the following table:

[0049] It can be seen that after the interface reinforcing steel bars 14 and threaded rods 13 are used to enhance the interface, the tensile strength of the test specimen is close to that of the complete test specimen, and the failure mode is matrix failure, with good integrity.

[0050] Referring to Figure 3As shown, the third aspect of the embodiment of the present application provides a UHPC prefabricated mold, comprising: The side wall of the side formwork 30 is provided with a plurality of positioning holes for penetrating and positioning the interface reinforcing steel bars 14. The threaded rod formwork comprises a threaded rod positioning plate 33 connected to the inner wall of the side formwork 30, and a plurality of threaded rods 13 inserted into the threaded rod positioning plate 33.

[0051] The side formwork 30 comprises a side inner formwork 31 and a side outer formwork 32 arranged at intervals, and the side inner formwork 31 and the side outer formwork 32 are fixedly connected to each other. The side walls of the side inner formwork 31 and the side outer formwork 32 are both provided with positioning holes for penetrating and positioning the interface reinforcing steel bars 14. The side wall of the threaded rod positioning plate 33 away from the threaded rods 13 is fixedly connected to the inner wall of the side inner formwork 31. The threaded rod positioning plate 33 is any one of foamed plastic, cork board, high-density sponge, asphalt, and rubber, to facilitate the insertion and positioning of the threaded rods 13.

[0052] Working principle The UHPC prefabricated plate, the UHPC prefabricated bridge deck, and the prefabricated plate mold provided by the embodiment of the present application are characterized in that the UHPC prefabricated plate 10 is provided with a prefabricated plate body, the prefabricated plate body comprises a high-performance concrete 11, a steel bar mesh 12 embedded in the high-performance concrete 11, a threaded rod 13 provided with a plurality of threaded rods arranged on the side wall of the high-performance concrete 11, and each threaded rod 13 is partially embedded in the high-performance concrete 11, and an interface reinforcing steel bar 14 provided with a plurality of interface reinforcing steel bars 14 embedded in the side wall of the high-performance concrete 11 in a horizontal direction.

[0053] Therefore, the threaded rods 13 and the interface reinforcing steel bars 14 are embedded in the side wall of the high-performance concrete 11 of the prefabricated plate body, the threaded rods 13 are partially embedded in the high-performance concrete 11, and the plurality of interface reinforcing steel bars 14 are embedded in the side wall of the high-performance concrete 11 in a horizontal direction. The threaded rods 13 and the interface reinforcing steel bars 14 arranged on the side wall of the prefabricated plate body can maximize the contact area of the interface, improve the bonding tensile strength and crack resistance of the interface, and improve the upper limit of the interface cracking.

[0054] In the description of the present application, it should be noted that the terms "upper", "lower", and the like are used for indicating the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. Unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connecting" should be interpreted broadly, for example, can be fixed connection, can also be detachable connection, or integral connection; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through an intermediate medium, can be internal communication of two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0055] It should be noted that in the present application, relational terms such as "first" and "second" and the like are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply that there is any such actual relationship or order between these entities or operations. Moreover, the terms "include", "contain" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such process, method, article or device. Without more limitations, the element defined by the statement "including a" does not exclude the presence of other identical elements in the process, method, article or device including the element.

[0056] The above is only a specific embodiment of the present application, which enables those skilled in the art to understand or implement the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to these embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features applied herein.

Claims

1. A UHPC prefabricated panel, characterized in that, include: The precast slab body includes ultra-high performance concrete (11) and a steel mesh (12) embedded in the ultra-high performance concrete (11). Threaded rod (13), multiple threaded rods (13) are provided and located on the side wall of the ultra-high performance concrete (11), and each threaded rod (13) is partially embedded in the ultra-high performance concrete (11); Interface reinforcement bars (14) are provided in multiple form, and the multiple interface reinforcement bars (14) are partially embedded in the side wall of the ultra-high performance concrete (11) in a horizontal direction.

2. The UHPC prefabricated panel as described in claim 1, characterized in that: The precast slab body has spaced protrusions (16) and / or grooves (15) on its sidewalls, and the threaded rod (13) and interface reinforcing steel bar (14) are located on the sidewalls of the protrusions (16) and / or grooves (15).

3. A UHPC prefabricated panel as described in claim 1 or 2, characterized in that: The steel mesh (12) includes transverse and longitudinal steel bars tied together, with one or both ends of the transverse and / or longitudinal steel bars extending outside the sidewall of the ultra-high performance concrete (11).

4. A UHPC prefabricated panel as described in claim 1 or 2, characterized in that: The threaded rod (13) has a length of 40mm to 60mm and a diameter of 1mm to 3mm. Each threaded rod (13) is evenly arranged on the side wall of the ultra-high performance concrete (11).

5. A UHPC prefabricated panel as described in claim 1 or 2, characterized in that: The length of the interface reinforcing steel bar (14) is 120mm~140mm, and the diameter of the interface reinforcing steel bar (14) is 6mm~8mm. Each interface reinforcing steel bar (14) is evenly arranged on the side wall of the ultra-high performance concrete (11).

6. A UHPC prefabricated bridge panel, characterized in that, include: The UHPC precast panel (10) according to any one of claims 1 to 5, wherein multiple UHPC precast panels (10) are laid out, and a wet joint interface is formed between two adjacent UHPC precast panels (10); Each wet joint interface is provided with a threaded rod (13) and an interface reinforcing steel bar (14), and the wet joint interfaces between two adjacent UHPC precast slabs (10) are connected by a wet joint (20).

7. A UHPC prefabricated bridge panel as described in claim 6, characterized in that: The wet joint (20) includes cast-in-place ultra-high performance concrete (21) filled in the wet joint interface between two adjacent UHPC precast slabs (10), and the cast-in-place ultra-high performance concrete (21) contains a first fiber (22). The threaded rod (13) and the interface reinforcing steel (14) on the wet joint interface are both embedded in the cast-in-place ultra-high performance concrete (21).

8. A UHPC prefabrication mold, characterized in that, include: Side panel template (30), the side panel template (30) is provided with multiple sections, the multiple sections of the side panel template (30) are connected end to end to form a mold cavity for casting UHPC precast slab (10); Multiple positioning holes are provided on the side wall of the side formwork (30) for inserting and positioning the interface reinforcing steel bars (14); The screw template includes a threaded rod positioning plate (33) connected to the inner wall of the side panel template (30), and several threaded rods (13) that are inserted into the threaded rod positioning plate (33).

9. A UHPC prefabrication mold as described in claim 8, characterized in that: The side panel template (30) includes an inner side panel template (31) and an outer side panel template (32) that are spaced apart from each other, and the inner side panel template (31) and the outer side panel template (32) are fixedly connected to each other; Positioning holes for inserting and positioning interface reinforcing bars (14) are provided on the side walls of both the inner side wall template (31) and the outer side wall template (32). The threaded rod positioning plate (33) is fixedly connected to the inner wall of the side panel template (31) on the side away from the threaded rod (13).

10. A UHPC prefabrication mold as described in claim 8, characterized in that: The threaded rod positioning plate (33) can be any one of foam plastic, cork board, high-density sponge, asphalt, or rubber.

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