High-strength steel bar HPFRC I-beam and pouring equipment thereof

Abstract

The application relates to the technical field of building components, in particular to a high-strength steel bar HPFRC (High Performance Fiber Reinforced Concrete) I-beam and a pouring equipment thereof. The high-strength steel bar HPFRC I-beam comprises a top plate, a web plate and a bottom plate, wherein the top plate, the web plate and the bottom plate are all made of high-performance fiber reinforced concrete; the steel fiber mixing amount in the top plate is consistent with that in the bottom plate, and the steel fiber mixing amount in the web plate is higher than that in the top plate and the bottom plate; and the bottom plate is internally arranged with high-strength steel bars, so that the cost can be reduced under the premise of guaranteeing stress.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of building components, in particular to a high-strength steel HPFRC I-beam and a pouring equipment thereof. BACKGROUND

[0002] In existing industrial plants, highway bridges, warehouse buildings and other types of structures, large-span roof coverings, floor coverings and load-bearing beams are mostly made of ordinary reinforced concrete or prestressed concrete beam components. Such structures have the following significant defects: first, the compactness of the concrete matrix is insufficient, and under the action of temperature and wet-dry cycles, continuous shrinkage and temperature cracks occur, and the expansion of rusted steel bars causes the concrete protective layer to peel off; second, the post-tensioned prestressed system has inherent shortcomings, and the compaction density of the duct is difficult to guarantee, and the invasion of water can easily cause the rusting and fracture of the prestressed steel bars, greatly shortening the service life of the bridge; third, the bearing capacity of ordinary concrete is limited, the cross section of the main beam is thick and heavy, the self-weight is large, the hoisting and transportation require high equipment, and the material carbon emission is large, which does not meet the development needs of lightweight and low-carbon prefabricated bridges.

[0003] High-performance fiber reinforced concrete (HPFRC) provides a new path for improving the durability of bridges due to its excellent compactness, crack resistance, corrosion resistance and freeze-thaw resistance. Non-prestressed I-beam bridges made of HPFRC can effectively reduce the cross-sectional size, reduce the structure height and self-weight, simplify the transportation, hoisting and on-site installation of prefabricated components, and prolong the service life of the bridge. However, the current HPFRC I-beam design adopts a uniform steel fiber dosage for the entire cross section, resulting in a large amount of steel fiber and high cost. SUMMARY

[0004] Therefore, it is necessary to provide a high-strength steel HPFRC I-beam and a pouring equipment thereof to solve the technical problem of high cost of the current HPFRC I-beam.

[0005] The above-mentioned purpose is achieved by the following technical solutions: A high-strength steel HPFRC I-beam, comprising a top plate, a web plate and a bottom plate, wherein the top plate, the web plate and the bottom plate are all made of high-performance fiber reinforced concrete; the steel fiber dosage in the top plate and the bottom plate is consistent, and the steel fiber dosage in the web plate is higher than that in the top plate and the bottom plate; and the bottom plate is internally configured with high-strength steel bars.

[0006] Further, the steel fiber dosage of the web plate is 1.1% to 1.3%, and the steel fiber dosage of the top plate and the bottom plate is both 0.7% to 1.0%.

[0007] Furthermore, the web has a gradually increasing thickness, with the web thickness gradually increasing from the middle of the beam span towards the two end supports; rounded chamfers are provided at the intersection of the top plate and the web, and at the intersection of the bottom plate and the web.

[0008] Furthermore, the high-strength steel bars arranged inside the base plate are HRB600 grade steel bars with a diameter of 28mm.

[0009] A casting device for high-strength reinforced concrete (HPFRC) I-beams, used to manufacture the aforementioned high-strength reinforced concrete (HPFRC) I-beams, includes a beam formwork and silos; the beam formwork is internally divided into a bottom slab casting area, a web casting area, and a top slab casting area by a partition; three silos are horizontally distributed, namely a first silo, a second silo, and a third silo, the first silo being used to cast the bottom slab to form the bottom slab, the second silo being used to cast the web to form the web, and the third silo being used to cast the top slab to form the top slab.

[0010] Furthermore, the bottom of the first, second, and third silos is provided with an opening, and each opening is provided with a valve, which is used to control the opening and closing of the corresponding opening.

[0011] Furthermore, it also includes a frame, on which the first, second, and third hoppers are all fixedly mounted; the bottom of the frame is provided with casters and a drive mechanism, which is used to drive the casters to move on the ground or on a track.

[0012] Furthermore, the partition is located at the intersection of the top plate and the web plate, and at the intersection of the web plate and the bottom plate. The partition is a mesh, an airbag, or a partition.

[0013] Furthermore, the casting equipment for high-strength steel HPFRC I-beams also includes a control system, which is connected to the drive mechanism of the frame and the control of each valve. The control system is used to control the moving speed of the frame and the opening sequence and degree of opening and closing of each valve.

[0014] Furthermore, the control system is configured to sequentially open the valves of the first silo, the second silo, and the third silo to achieve layered continuous casting of the bottom slab casting area, the web casting area, and the top slab casting area.

[0015] The beneficial effects of this invention are: The high-strength reinforced concrete (HPFRC) I-beam and its casting equipment provided by this invention use high-performance fiber-reinforced concrete to replace ordinary concrete, resulting in a dense matrix that is crack-resistant and corrosion-resistant, extending the service life of the bridge. Furthermore, the steel fiber content is adjusted according to the stress differences in different parts of the I-beam. Since the web bears the principal shear stress, a high steel fiber content can improve the shear and crack resistance of the web; while the top and bottom slabs are mainly subjected to bending stress, a lower steel fiber content is used, reducing costs while ensuring load-bearing capacity. In addition, the bottom slab is equipped with high-strength steel bars, which mainly bear the tensile force in the tension zone, working in conjunction with the steel fibers to further improve the bending bearing capacity. Attached Figure Description

[0016] Figure 1 This is a structural schematic diagram of a high-strength steel reinforced concrete HPFRC I-beam provided in an embodiment of the present invention; Figure 2 This is a structural schematic diagram of a bridge equipped with high-strength steel HPFRC I-beams according to an embodiment of the present invention. Figure 3 This is a schematic cross-sectional view of a bridge equipped with high-strength steel HPFRC I-beams according to an embodiment of the present invention. Figure 4 This is a schematic diagram of the casting process of a high-strength steel HPFRC I-beam according to an embodiment of the present invention.

[0017] in: 100, HPFRC I-beam; 110, Top slab; 120, Web; 130, Bottom slab; 200, Guardrail; 300, Wet joint; 400, Pier; 500, Pile foundation; 600, Cap beam; 700, Rounded chamfer; 800, High-strength steel reinforcement; 900, Asphalt; 1001, First silo; 1002, Second silo; 1003, Third silo. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below through embodiments and in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

[0019] The component designations used in this document, such as "first" and "second," are merely for distinguishing the described objects and do not have any sequential or technical meaning. The terms "connection" and "linkage" used in this invention, unless otherwise specified, include both direct and indirect connections (linkages). It should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are used only for the convenience of describing the invention and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as limiting the invention.

[0020] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0021] like Figures 1 to 3 As shown, an embodiment of the present invention provides a high-strength reinforced concrete (HPFRC) I-beam (hereinafter referred to as HPFRC I-beam 100), comprising a top plate 110, a web 120, and a bottom plate 130. The top plate 110, web 120, and bottom plate 130 are all made of high-performance fiber-reinforced concrete (also known as HPFRC). The steel fiber content in the top plate 110 and the bottom plate 130 is the same, while the steel fiber content in the web 120 is higher than that in the top plate 110 and the bottom plate 130. High-strength steel bars 800 are arranged inside the bottom plate 130.

[0022] Steel fiber content refers to the percentage of steel fiber volume in the total volume of high-performance fiber-reinforced concrete. HPFRC is a high-performance concrete-based composite material prepared based on the principle of closest packing, using cement and admixtures (silica fume, mineral powder, etc.) as cementing materials, fine aggregates (quartz sand, etc.) as aggregates, and incorporating high-efficiency water-reducing agents and steel fibers.

[0023] The high-strength reinforced concrete (HPFRC) I-beam of this invention uses high-performance fiber-reinforced concrete instead of ordinary concrete, resulting in a dense matrix that is crack-resistant and corrosion-resistant, extending the service life of the bridge. Furthermore, the steel fiber content is adjusted according to the stress differences in different parts of the I-beam. Since the web 120 bears the principal shear stress, a high steel fiber content enhances the shear and crack resistance of the web 120. The top slab 110 and bottom slab 130, which are primarily subjected to bending, use a lower steel fiber content, reducing costs while ensuring load-bearing capacity. In addition, the bottom slab 130 is equipped with high-strength steel bars 800, which mainly bear the tensile force in the tension zone, working in conjunction with the steel fibers to further improve the bending bearing capacity.

[0024] Furthermore, the steel fiber content of the web 120 is 1.1% to 1.3%; the steel fiber content of the top plate 110 and the bottom plate 130 is 0.7% to 1.0%. The 1.1% to 1.3% steel fiber content of the web 120 ensures that its shear capacity meets the specifications; the 0.7% to 1.0% steel fiber content of the top plate 110 and the bottom plate 130 reduces the amount of steel fiber used while meeting crack resistance requirements, thus reducing material costs.

[0025] Furthermore, the web 120 has a gradually increasing thickness, with the thickness gradually increasing from the middle of the beam span towards the two end supports. A rounded chamfer 700 is provided at the intersection of the top plate 110 and the web 120, and at the intersection of the bottom plate 130 and the web 120. Since the shear force is greater near the supports, the gradual increase in the thickness of the web 120 towards the supports matches the shear force distribution and improves the shear bearing capacity. The rounded chamfer 700 eliminates right-angle stress concentration, preventing stress cracks at corners; it also facilitates concrete flow during pouring, reducing porosity and voids at corners.

[0026] Furthermore, the high-strength steel bars 800 configured inside the base plate 130 are HRB600 grade steel bars with a diameter of 28mm. The high-strength steel bars 800 are arranged longitudinally along the HPFRC I-beam 100. The HRB600 high-strength steel bars 800 have high strength, and the 28mm diameter is a large diameter steel bar, which improves the bending bearing capacity of the tension zone of the base plate 130 and reduces the amount of steel bars used.

[0027] Table 1 below shows the steel fiber content in different parts of the HPFRC I-beam 100 of this invention: The top slab 110 is in compression under longitudinal stress and does not require steel fibers to contribute tensile strength. Laterally, it is a one-way slab of the bridge deck, where a steel fiber content of 0.7%–1.0% is sufficient to demonstrate its excellent crack resistance while ensuring shear resistance at the bridge deck root. The web 120 is configured with a steel fiber content of 1.2% to provide sufficient shear resistance for the structure. The bottom slab 130 is in tension; HPFRC contributes only 7% to the flexural bearing capacity, which is mainly provided by the HRB600 and 28mm diameter high-strength 800 steel bars. A steel fiber content of 0.7%–1.0% is sufficient to meet crack resistance requirements in this area.

[0028] Table 2 below compares the parameters of the HPFRC I-beam 100 with differentiated steel fiber distribution and the I-beam with uniform steel fiber distribution according to the present invention: In Examples 1 and 2, the upper and lower limits of steel fiber content in Table 1 above were used, respectively. Calculations showed that these two HPFRC I-beams with differentiated steel fiber content distributions could reduce steel fiber content by 13%–33%, lower HPFRC material costs by 7%–16%, further reducing the structural cost of HPFRC I-beams and enhancing their application value.

[0029] Table 3 below compares the parameters of the HPFRC I-beam 100 of this invention with those of existing hollow slabs, small box girders, and T-beams in engineering examples (all based on a 20m span): Structural performance analysis of the HPFRC I-beam 100 of this invention: small beam height; small cross-sectional dimensions and light weight; leverages the advantages of high-strength steel reinforcement's high load-bearing capacity and HPFRC steel fiber's excellent crack resistance; eliminates the need for prestressed steel reinforcement, while reducing the amount of ordinary steel reinforcement; simple precast beam manufacturing process; good durability of HPFRC material; HPFRC's self-compacting and self-leveling properties result in better precast performance and superior precast beam casting quality; significantly reduces structural carbon emissions; eliminates the problem of prestress loss due to HPFRC shrinkage deformation; and simplifies construction by eliminating the need for a cast-in-place bridge deck layer.

[0030] Structural performance analysis of hollow core slabs: The hollow section results in high bending efficiency; the thin web leads to weak shear resistance; there are many hinges and joints, resulting in poor overall integrity; the material consumption is the highest; the hinges are prone to damage, leading to failure of lateral connections, resulting in stress on a single hollow core slab, and more defects in the later stages.

[0031] Structural performance analysis of the small box girder: The closed box section exhibits good overall cross-sectional integrity, outstanding torsional resistance, and strong overall structure. However, post-tensioned prestressed ducts are prone to incomplete grouting, affecting structural durability. The large lifting weight places high demands on transportation and hoisting equipment.

[0032] Structural performance analysis of T-beams: Post-tensioned prestressed ducts are prone to incomplete grouting, affecting structural durability; the large lifting weight places high demands on transportation, lifting, and other construction equipment; the large amount of materials used results in high costs, and there is a significant risk of overturning during lifting.

[0033] In summary, the HPFRC I-beam 100 of this invention has the following advantages over conventional hollow slabs, small box girders, and T-beams: 1) The building height is relatively low, which helps to reduce the length of the approach bridge and the height of the roadbed fill, thereby reducing the overall cost of the project.

[0034] 2) By utilizing the high strength, high toughness, and good crack resistance of HPFRC material, the advantages of high-strength steel bars can be fully utilized, eliminating the need for prestressed steel bars, avoiding the complex construction process and subsequent defects of prestressed steel bars, and improving the durability of the structure.

[0035] 3) The single beam has a lighter lifting weight, which reduces the requirements for construction equipment such as transportation and hoisting, making it particularly suitable for site-constrained environments such as mountainous areas; at the same time, the self-weight of the superstructure is relatively small, which can save on the amount of material used in the substructure.

[0036] 4) The HPFRC I-beam 100 has good workability and excellent precast casting performance; eliminating the need for a cast-in-place layer on the bridge deck can avoid its complex construction process and possible cracks.

[0037] like Figure 2 and Figure 3 As shown, taking a three-lane highway bridge as an example, the structure uses eight HPFRC I-beams (100mm) with a beam spacing of 2.1m. The precast beams are connected by wet joints (300mm). The main beams do not have a deck panel; instead, a 10cm asphalt (900mm) pavement and guardrails (200mm) are laid directly on top. One transverse diaphragm is installed at the end of the main beam, and another transverse diaphragm is installed at the mid-span. The diaphragms are made of C50 cast-in-place concrete. The substructure consists of cap beams (600mm), piers (400mm), and pile foundations (500mm).

[0038] The HPFRC I-beam 100 of this invention can be applied to highway bridges with spans of 10m, 13m, 16m, 20m, and 25m. Taking a 20m span as an example, the design scheme of the HPFRC I-beam 100 is introduced. The component calculation is controlled according to the reinforced concrete component, and its cross-sectional shape, general structure, and reinforcement are as follows: The HPFRC I-beam 100 has a beam height of 1.1m, and the web 120 thickness gradually changes from 0.12m at mid-span to 0.14m at the supports. The top slab 110 is 1.6m wide, with a cantilever end thickness of 0.12m and a root thickness of 0.15m. The bottom slab 130 is 1.0m wide, and both the top and bottom slabs 110 and 130 have a 0.2m radius chamfer at their roots. The HPFRC I-beam 100 is a reinforced concrete member, with HRB600 high-strength steel bars (28mm diameter) longitudinally arranged within the bottom slab. The top slab 110 uses a double-layer steel mesh reinforcement, with the transverse bridge-direction reinforcement at the top and bottom edges using HRB600 high-strength steel bars (12mm diameter) and the longitudinal bridge-direction reinforcement using HRB400 ordinary steel bars (8mm diameter). The staggered reinforcement between the top and bottom reinforcement bars uses HRB400 ordinary steel bars (6mm diameter). The web 120 is equipped with a certain number of ordinary steel bars and steel fibers to provide shear bearing capacity. Double-leg stirrups with a diameter of 14mm are configured at the ends of the beam with high shear requirements, and single-leg stirrups with a diameter of 16mm are configured at the middle positions of the beam with low shear requirements. The differentiated web reinforcement method is precisely matched with the shear requirements, while reducing the amount of steel reinforcement.

[0039] The present invention also provides a casting device for high-strength steel reinforced concrete (HPFRC) I-beams, used to manufacture the aforementioned high-strength steel reinforced concrete (HPFRC) I-beams, including a beam template (not shown in the figure) and silos; the beam template is provided with a partition (not shown in the figure) inside, which divides the interior of the beam template into a bottom plate casting area, a web casting area, and a top plate casting area; there are three silos distributed horizontally, namely a first silo 1001, a second silo 1002, and a third silo 1003. The first silo 1001 is used to cast the bottom plate casting area to form a bottom plate 130; the second silo 1002 is used to cast the web casting area to form a web 120; and the third silo 1003 is used to cast the top plate casting area to form a top plate 110.

[0040] By setting partitions inside the template, the inner cavity of the template is pre-divided into three pouring zones, which facilitates the pouring of HPFRC concrete with different steel fiber content into different zones. The first silo 1001, the second silo 1002, and the third silo 1003 are pre-stored with HPFRC with different steel fiber content to achieve zoned material supply.

[0041] Concrete with different steel fiber content can be mixed using a dual weighing hopper consisting of components A and B. Component A is HPFRC, and component B is steel fiber. By collecting the weight of both hoppers in real time with high precision, the actual output can be calculated, allowing for accurate feeding according to the set ratio and improving production efficiency.

[0042] Furthermore, the bottoms of the first hopper 1001, the second hopper 1002, and the third hopper 1003 are all provided with openings, and each opening is equipped with a valve. These valves are used to control the opening and closing of the corresponding opening. By independently controlling the discharge from each hopper with three valves, the discharge from the three hoppers can be opened and closed individually, facilitating the supply of materials to each casting area according to the process sequence. The valves can be electric gate valves, butterfly valves, etc.; the valve opening degree is adjustable, thereby controlling the discharge rate.

[0043] Furthermore, it also includes a frame, on which the first hopper 1001, the second hopper 1002, and the third hopper 1003 are all fixedly mounted; the bottom of the frame is provided with casters and a drive mechanism, the drive mechanism being used to drive the casters to move on the ground or a track. Continuous material placement and pouring can be achieved by utilizing the longitudinal movement of the frame along the beam.

[0044] Furthermore, the separators are located at the intersections of the top plate 110 and the web plate 120, and at the intersections of the web plate 120 and the bottom plate 130. The separators can be a sealing mesh, an airbag, or a partition. The separators are positioned at the junctions to separate the bottom plate casting area, the web plate casting area, and the top plate casting area, preventing large-scale mixing of concrete with different steel fiber content during the initial casting stage. When the separator is an airbag, it needs to be deflated and removed after casting; when the separator is a sealing mesh, it can remain as part of the beam; when the separator is a partition, it needs to be removed entirely before molding.

[0045] Furthermore, it also includes a control system, which is connected to the drive mechanism of the frame and the control of each valve. The control system is used to control the moving speed of the frame and the opening sequence and degree of opening and closing of each valve. This facilitates the unified coordination of the walking speed and the opening and closing sequence and degree of opening and closing of each hopper valve.

[0046] Furthermore, the control system is configured to sequentially open the valves of the first silo 1001, the second silo 1002, and the third silo 1003 to achieve layered casting of the bottom slab casting area, the web casting area, and the top slab casting area.

[0047] Specifically, such as Figure 4 The diagram shows the pouring process of a high-strength reinforced concrete (HPFRC) I-beam. The three shaded areas corresponding to the top slab 110, web 120, and bottom slab 130 represent the pouring times for the top slab, web, and bottom slab pouring areas, respectively. The control system first opens the valve of the first silo 1001 to pour concrete for the bottom slab 130, waiting for the bottom slab pouring area to self-compact and level. During this pouring process, the valve of the second silo 1002 is opened to pour concrete for the web. After the web pouring area self-compacts and levels, the valve of the third silo 1003 is opened to pour concrete for the top slab, completing the layered continuous pouring.

[0048] In conjunction with the above embodiments, the working process of the high-strength steel reinforced concrete HPFRC I-beam casting equipment of the present invention is as follows: Before production, high-strength steel bars 800 are first tied and laid inside the beam formwork. The HRB600 grade high-strength steel bars 800 with a diameter of 28mm are placed in the area corresponding to the bottom plate 130 of the beam formwork, and the above-mentioned steel reinforcement structure is arranged in the areas corresponding to the top plate 110 and the web plate 120 inside the beam formwork. Then, partitions are installed at the intersection of the top plate 110 and the web plate 120 and the intersection of the web plate 120 and the bottom plate 130 inside the beam formwork to divide the inner cavity of the formwork into the bottom plate 130 casting area, the web plate 120 casting area and the top plate 110 casting area.

[0049] Then, the control system controls the drive mechanism at the bottom of the frame, which drives the moving wheels to move the frame along the longitudinal direction (i.e., the vehicle's travel direction) of the HPFRC I-beam 100. The control system first opens the valve of the first hopper 1001 to pour concrete into the bottom slab pouring area. During the leveling process of the bottom slab concrete pouring, the control system opens the valve of the second hopper 1002 to pour web concrete into the web pouring area, ensuring the web concrete covers the bottom slab 130. Subsequently, the control system opens the valve of the third hopper 1003 to pour top slab concrete into the top slab pouring area, ensuring the top slab concrete covers the web 120, completing the layered continuous pouring of the bottom slab, web, and top slab pouring areas. After one pour is completed, the moving frame moves out of the current working area to prepare for the pouring of the next HPFRC I-beam 100.

[0050] After the pouring is completed, if airbags or partitions are used as separators, the airbags are deflated and the partitions are removed; the sealing mesh is left inside the component; after the concrete has cured and been demolded, the high-strength steel HPFRC I-beam described in this invention can be obtained.

[0051] In addition, concrete admixtures (retarders / early strength agents) can be added during the concrete preparation process to ensure that the setting time curves of the bottom slab concrete, web concrete, and top slab concrete basically overlap.

[0052] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0053] The above-described embodiments are merely illustrative of several implementations of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention.

Claims

1. A high-strength reinforced concrete HPFRC I-beam, comprising a top plate, a web plate, and a bottom plate, characterized in that: The top slab, web slab, and bottom slab are all made of high-performance fiber-reinforced concrete; the steel fiber content in the top slab and bottom slab is the same, while the steel fiber content in the web slab is higher than that in the top slab and bottom slab; the bottom slab is internally reinforced with high-strength steel bars.

2. The high-strength steel reinforced HPFRC I-beam according to claim 1, characterized in that, The steel fiber content of the web plate is 1.1% to 1.3%; the steel fiber content of the top plate and the bottom plate is 0.7% to 1.0%.

3. The high-strength steel reinforced HPFRC I-beam according to claim 1, characterized in that, The web has a gradually increasing thickness, which increases from the middle of the beam span towards the two end supports; the intersection of the top plate and the web, and the intersection of the bottom plate and the web are all provided with rounded chamfers.

4. The high-strength steel reinforced HPFRC I-beam according to claim 1, characterized in that, The high-strength steel bars inside the base plate are HRB600 grade, 28mm in diameter.

5. A casting device for high-strength reinforced concrete HPFRC I-beams, used to manufacture high-strength reinforced concrete HPFRC I-beams as described in any one of claims 1-4, characterized in that, include: The beam formwork has internal partitions that divide the interior of the beam formwork into a bottom slab pouring area, a web pouring area, and a top slab pouring area. The material silos are distributed horizontally in three parts: the first material silo, the second material silo, and the third material silo. The first material silo is used to pour the bottom slab pouring area to form the bottom slab, the second material silo is used to pour the web pouring area to form the web, and the third material silo is used to pour the top slab pouring area to form the top slab.

6. The casting equipment for high-strength steel reinforced concrete HPFRC I-beams according to claim 5, characterized in that, The bottom of the first, second, and third silos is provided with an opening, and each opening is provided with a valve, which is used to control the opening and closing of the corresponding opening.

7. The casting equipment for high-strength steel HPFRC I-beams according to claim 6, characterized in that, It also includes a frame, on which the first, second and third hoppers are fixedly mounted; the bottom of the frame is provided with casters and a drive mechanism, which is used to drive the casters to move on the ground or on a track.

8. The casting equipment for high-strength steel HPFRC I-beams according to claim 7, characterized in that, The separator is located at the intersection of the top plate and the web plate, and at the intersection of the web plate and the bottom plate. The separator is a mesh, an airbag, or a partition.

9. The casting equipment for high-strength steel HPFRC I-beams according to claim 8, characterized in that, It also includes a control system, which is connected to the drive mechanism of the frame and each valve control, and is used to control the moving speed of the frame and the opening sequence and degree of opening and closing of each valve.

10. The casting equipment for high-strength steel HPFRC I-beams according to claim 9, characterized in that, The control system is configured to open the valves of the first silo, the second silo, and the third silo in sequence to achieve layered continuous casting of the bottom slab casting area, the web casting area, and the top slab casting area.

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