A type of tie rod-free precast hydraulic T-beam formwork for highways

Abstract

This invention discloses a tie-rod-free hydraulic T-beam formwork for highway precast beams, comprising two sets of outer molds and a base. The two sets of outer molds are arranged opposite each other, and the base is positioned between the two outer molds. Each set of outer molds includes multiple parallel outer frames and side steel plates. The outer sides of the multiple outer frames of each set of outer molds are connected by a through beam. Side steel plates are respectively provided on the opposite sides and top surfaces of the two sets of outer molds, and a bottom steel plate is provided on the top of the base. Each outer frame is fixed on a slider, which is mounted on a sliding block perpendicular to the through beam. Each slider is connected to its corresponding sliding block via a hydraulic cylinder I. One end of a hydraulic cylinder II is hinged to the through beam at the position of each transverse diaphragm of the T-beam, and the other end of the hydraulic cylinder II passes through the side steel plate and contacts the concrete. This invention has a simple structure, is easy to operate, can reduce production costs, improve production efficiency, has good safety, and can ensure the overall appearance quality of the precast beam.

Description

Technical Field

[0001] This invention relates to a tie rod-free precast hydraulic T-beam formwork for highways. Background Technology

[0002] The existing precast T-beam formwork is mainly reinforced by using threaded steel bars or threaded round rods as upper and lower tie rods for anti-tie fixing. Due to the large span between the upper and lower tie rods, a large number of longitudinal points are required to meet the stress requirements. Removing the tie rods requires completely unscrewing the nuts at one end and pulling the tie rod out completely before proceeding to the next step, which consumes a lot of manpower and resources. In particular, the removal of the upper tie rods involves working at height, posing a safety hazard. The formwork consists of multiple individual panels, and its removal requires specialized lifting equipment and overhead cranes to lift and remove them piece by piece. This process results in many seams between the individual panels, affecting the appearance of the precast beam. The overhead cranes are heavily occupied during lifting and removal, leading to low work efficiency, impacting the construction period, and posing significant safety hazards, as the formwork is prone to deformation during lifting and placement. Furthermore, the outer tie rods and lifting columns need to be located far from the outer edge of the formwork to avoid exposed reinforcing bars on the flanges, increasing costs and making transportation inconvenient. Summary of the Invention

[0003] To address the aforementioned technical problems, this invention provides a tie-rod-free hydraulic T-beam template for highway precasting that is simple in structure, easy to operate, reduces production costs, improves production efficiency, ensures good safety, and guarantees the overall appearance quality of precast beams.

[0004] The technical solution adopted in this invention is as follows: a tie-rod-free precast hydraulic T-beam formwork for highways, comprising two sets of outer molds and a base, the two sets of outer molds being arranged opposite each other, and the base being positioned between the two outer molds; each set of outer molds includes multiple parallel outer frames and side steel plates, the outer sides of the multiple outer frames of each set of outer molds being connected by a through beam, the through beam being perpendicular to the outer frames; side steel plates are respectively provided on the opposite sides of the two sets of outer molds and on the top surfaces of the two sets of outer molds, and a bottom steel plate is provided on the top of the base, the side steel plates and the bottom steel plate forming a T-shaped cavity with a cross-section that is larger at the top and smaller at the bottom; each outer frame is fixed on a slider, the slider being positioned on a slide block, the slide block being perpendicular to the through beam; each slider and its corresponding slide block are connected by a hydraulic cylinder I, one end of the hydraulic cylinder I being hinged to the slider, and the other end of the hydraulic cylinder I being hinged to the slide block; one end of a hydraulic cylinder II is hinged to the through beam at the position of each transverse diaphragm of the T-beam, and the other end of the hydraulic cylinder II passes through the side steel plate and contacts the concrete.

[0005] In the aforementioned tie-bar-free precast hydraulic T-beam formwork for highways, multiple support rods are connected to the opposite surfaces of the two side steel plates. The support rods are inclined, with the upper end connected to the through beam and the lower end connected to the foundation.

[0006] In the aforementioned tie-rod-free precast hydraulic T-beam formwork for highways, a lead screw is provided at each end of the slider, and the slider is connected to the outer frame through the lead screw; a lug I is provided at the bottom of the outer mold near the slider and on the slider, and the lug I at the bottom of the outer mold is connected to the lug I on the corresponding slider through a pin; a hinge lug is provided at the end of the slider facing the side steel plate, and the hinge lug is hinged to the hydraulic cylinder I.

[0007] In the aforementioned tie-bar-free precast hydraulic T-beam formwork for highways, a guide rail is provided between the two sets of outer molds. The guide rail is set perpendicular to the outer frame, and multiple rollers are provided at the bottom of the base. The base is supported on the guide rail by the rollers.

[0008] In the aforementioned tie-bar-free precast hydraulic T-beam formwork for highways, the external frame includes multiple horizontal bars, columns, vertical beams, a top beam, and diagonal beams. The columns and vertical beams are arranged in parallel, with the vertical beams located inside the columns. The tops of the columns and vertical beams are connected to the top beams. Multiple horizontal bars connect the columns and vertical beams, and the horizontal bars are arranged horizontally. One end of the diagonal beam is connected to the bottom of the vertical beam, and the other end is connected to the column. The end of the diagonal beam connected to the column is lower than the end connected to the vertical beam. The vertical beams of the external frames of the two sets of external formwork are arranged opposite each other.

[0009] In the aforementioned tie rod-free precast hydraulic T-beam formwork for highways, multiple hinges are provided on both sides of the base, and each hinge is connected to an L-shaped locking seat. The locking seat is provided with a locking screw hole, and a locking screw is provided in the locking screw hole. The locking screw is pressed against the bottom of the outer mold and is horizontally positioned.

[0010] Compared with the prior art, the beneficial effects of the present invention are:

[0011] This invention features a simple structure, employing support rods and hydraulic cylinder I to support the outer mold. It eliminates the need for tie rods, thus avoiding the installation and removal of tie rods, making operation convenient and saving labor. It also reduces the risks associated with working at heights; the overall appearance quality of the precast beam is high due to the integrated assembly and disassembly of the outer mold; the use of hydraulic cylinders I and II for mold assembly and disassembly significantly reduces the use of overhead cranes, saving costs; it improves process efficiency, shortens the beam fabrication period; and it reduces steel consumption, saving on raw material and transportation costs. Attached Figure Description

[0012] Figure 1 This is the main view of the existing precast T-beam formwork for highways.

[0013] Figure 2 This is a side view of the existing precast T-beam formwork for highways.

[0014] Figure 3 This is a top view of the existing precast T-beam formwork for highways.

[0015] Figure 4 This is a side view of the present invention.

[0016] Figure 5 This is a top view of the present invention.

[0017] Figure 6 yes Figure 4 Sectional view of AA.

[0018] Figure 7 yes Figure 4 Cross-sectional view of the middle section (BB).

[0019] Figure 8 yes Figure 4 Cross-sectional view of the middle CC section.

[0020] Figure 9 yes Figure 7 Enlarged view of point A in the middle.

[0021] Figure 10 This is a side view of the outer frame of the present invention.

[0022] In the diagram: 1. Upper tie rod; 2. Crossbar; 3. Column; 4. Lower tie rod; 5. Outer frame; 6. Hydraulic cylinder I; 7. Support rod; 8. Locking screw; 9. Side steel plate; 10. Base; 11. Guide rail; 12. Bottom steel plate; 13. Slider; 14. Slide block; 15. Lead screw; 16. L-shaped locking seat; 17. Hinge I; 18. Hinge II; 19. Through beam; 20. Back rib; 21. Hydraulic cylinder II; 101. Slide beam; 102. Hinge. Detailed Implementation

[0023] The present invention will now be further described with reference to the accompanying drawings.

[0024] like Figures 4 to 10 As shown, the present invention includes two sets of outer molds and a base 10. The two sets of outer molds are arranged opposite to each other, and the base 10 is located between the two outer molds. Each set of outer molds includes multiple parallel outer frames 5 and side steel plates 9. The outer frames 5 of each set of outer molds are connected by two through beams 19, which are perpendicular to the outer frames 5. The outer frames include multiple horizontal bars 2, columns 3, vertical beams 51, top beams 52, and inclined beams 53. The columns 3 and vertical beams are arranged in parallel. The tops of the columns 3 and vertical beams 51 are connected to the top beams 52. Multiple horizontal bars 2 are connected between the columns 3 and vertical beams 51, and the horizontal bars 2 are arranged horizontally. One end of the inclined beam 53 is connected to the bottom of the vertical beam 51, and the other end is connected to the column 3. The end of the inclined beam 53 connected to the column is lower than the end connected to the vertical beam. The vertical beams of the outer frames 5 of the two sets of outer molds are arranged opposite to each other. Two guide rails 11 are provided between the two sets of outer molds. The guide rails 11 are set perpendicular to the outer frame 5. The bottom of the base 10 is provided with two sets of rollers 101. The base 10 is supported on the two guide rails 11 by the two sets of rollers 101. Alternatively, there may be only one guide rail 11 between the two sets of outer molds, and the bottom of the base 10 is provided with a set of rollers 101.

[0025] Side steel plates 9 are provided on the opposite sides of the two sets of outer frames 5 and on the top surfaces of the two sets of outer molds, and a bottom steel plate 12 is provided on the top of the base 10. The side steel plates 9 and the bottom steel plate 12 form a T-shaped cavity with a larger cross-section at the top and a smaller cross-section at the bottom. Each outer frame 5 is fixed on a slider 13, which is set on a slide block 14, which is perpendicular to the T-shaped beam. Each slider 13 is connected to the corresponding slide block 14 by a hydraulic cylinder I 6. One end of the hydraulic cylinder I 6 is hinged to a lug II 18, which is located at the end of the slider 13 facing the side steel plate. The other end of the hydraulic cylinder I 6 is hinged to the slide block 14. A lead screw 15 is provided at each end of the slider 13, and the slider 13 is connected to the outer frame 5 by the lead screw 15. A hinge lug I 17 is provided at the bottom of the side steel plate 9 near the slider and on the slider, respectively. The hinge lug I 17 at the bottom of the side steel plate 9 and the corresponding hinge lug I 17 on the slider are connected by a pin.

[0026] Multiple support rods 7 are connected to the opposite surfaces of the two side steel plates 9. The support rods 7 are inclined, with their upper ends connected to the through beam 19 and their lower ends connected to the foundation. Multiple hinge lugs 102 are provided on both sides of the base. Each hinge lug 102 is hinged to an L-shaped locking seat 16. The locking seat 16 has locking screw holes, and locking screws 8 are installed in the locking screw holes. The locking screws 8 are pressed against the bottom of the outer frame and are horizontally positioned. One end of a hydraulic cylinder II 21 is hinged to the upper part of one of the two through beams 19. The other end of the hydraulic cylinder II 21 passes through the side steel plate 9 and directly contacts the concrete.

[0027] This invention, by adding hydraulic cylinders I6 and II21, enables remote-controlled demolding and assembly of the entire formwork in a single operation. The entire process can be completed by a single person without the need for a crane. Furthermore, the side steel plate 9 and bottom steel plate 12 are a single, seamless structure, ensuring the appearance quality of the resulting T-beams. This also avoids the repetitive work and increased costs and safety hazards associated with individual crane lifting of certain formwork sections, as is common in existing technologies. The shortened scaffolding columns significantly reduce steel consumption, saving costs and solving transportation difficulties.

Claims

1. A tie-bar-free precast hydraulic T-beam formwork for highways, characterized in that: The system includes two sets of outer molds and a base. The two sets of outer molds are arranged opposite each other, and the base is positioned between the two outer molds. Each set of outer molds includes multiple parallel outer frames and side steel plates. The outer sides of the multiple outer frames of each set of outer molds are connected by a through beam, which is perpendicular to the outer frames. Side steel plates are provided on the opposite sides and top surfaces of the two sets of outer molds. A bottom steel plate is provided on the top of the base. The side steel plates and the bottom steel plate form a T-shaped cavity with a larger top and smaller bottom cross section. Each outer frame is fixed on a slider, which is set on a slide block, which is perpendicular to the through beam. Each slider and its corresponding slide block are connected by a hydraulic cylinder I. One end of the hydraulic cylinder I is hinged to the slider, and the other end is hinged to the slide block. One end of the hydraulic cylinder II is hinged to the through beam at the position of each transverse diaphragm of the T-shaped beam. The other end of the hydraulic cylinder II passes through the side steel plate and contacts the concrete. Multiple support rods are connected to the opposite surfaces of the two side steel plates. The support rods are set at an angle, with the upper end connected to the through beam and the lower end connected to the foundation. The slider has a lead screw at each end, and the slider is connected to the outer frame through the lead screw; the bottom of the outer mold near the slider and the slider are respectively provided with lug I, and the lug I at the bottom of the outer mold is connected to the lug I on the corresponding slider through a pin; the slider has a hinge lug at the end facing the side steel plate, and the hinge lug is hinged to the hydraulic cylinder I. The two sets of outer molds are provided with a guide rail, which is set perpendicular to the outer frame. The bottom of the base is provided with multiple rollers, and the base is supported on the guide rail by the rollers.

2. The tie-bar-free precast hydraulic T-beam formwork for highways according to claim 1, characterized in that: The external scaffold includes multiple horizontal bars, columns, vertical beams, a top beam, and diagonal beams. The columns and vertical beams are arranged in parallel, with the vertical beams located inside the columns. The tops of the columns and vertical beams are connected to the top beam. Multiple horizontal bars connect the columns and vertical beams, and the horizontal bars are arranged horizontally. One end of the diagonal beam is connected to the bottom of the vertical beam, and the other end is connected to the column. The end of the diagonal beam connected to the column is lower than the end connected to the vertical beam. The vertical beams of the two sets of external formwork are arranged opposite each other.

3. The tie-bar-free precast hydraulic T-beam formwork for highways according to claim 1, characterized in that: The base has multiple hinges on both sides, each hinge is connected to an L-shaped locking seat, the locking seat has a locking screw hole, the locking screw is installed in the locking screw hole, the locking screw is pressed against the bottom of the outer mold, and the locking screw is set horizontally.

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