High and large formwork for prefabricating variable cross-section segmental beam

Abstract

The invention relates to the technical field of segmental beam construction equipment, in particular to a high and large formwork for prefabricating a variable-cross-section segmental beam, which comprises a high and large formwork main body and an inner formwork trolley frame, outer side formworks are arranged on two sides of the high and large formwork main body, an outer lower formwork is arranged below the space between the outer side formworks, an outer formwork support frame is connected below the outer side formworks, and the outer formwork support frame is connected with an inner formwork trolley frame. Two ends of the tall formwork main body are respectively provided with an end formwork, the inner formwork trolley frame is inserted into the end formworks, the inner formwork trolley frame is respectively provided with an inner upper formwork and an inner lower formwork above and below an inner cavity part of a segmental beam, and two sides of the inner upper formwork are respectively provided with a first inner side formwork and a second inner side formwork. According to the high and large formwork of the prefabricated variable-cross-section segmental beam, the inner formwork body is of a segmental supporting structure, so that the inner formwork body is stable in structure, the formwork body can be automatically unfolded and demolded, and the situation that the construction efficiency is affected due to the fact that the operation space of the inner formwork body is insufficient is avoided.

Description

Technical Field

[0001] The invention relates to the technical field of segmental beam construction equipment, in particular to a tall template for prefabricating variable-section segmental beams. Background Art

[0002] Prefabricated variable-section segmental beams are a commonly used component in bridge construction. Beam segments with different cross-sections are prefabricated in the factory and then transported to the construction site for assembly and connection to form a complete bridge structure.

[0003] The existing prefabricated variable-section segmental beams have a large change in segment prefabrication height when the height is 3.6m to 8.5m and the beam width is 19.95m. The length of the 8.5m high segmental beam is only 2m. At the same time, the slope of the bottom surface of the box beam is as high as 11.7%, and the risk of overturning during prefabrication and bottom mold trolley transportation of the beam box beam is high. In addition, the top surface of the box beam is provided with a 4% transverse slope, the slopes of the left and right webs are inconsistent, and the entire template structure is asymmetrical on the left and right, which brings inconvenience to the adjustment of the template. At the same time, the prefabricated box beam is a double-chamber structure. When the thickness of the middle web reaches 800mm, the space of the inner template and the inner mold trolley is limited, resulting in a small demoulding space, affecting the construction efficiency. Summary of the invention

[0004] The purpose of the present invention is to provide a tall formwork for prefabricated variable-section segmental beams to solve the problems raised in the above-mentioned background technology that when the height of the formwork of prefabricated variable-section segmental beams on the current market changes greatly, there is a high risk of overturning when the prefabrication and bottom formwork trolley transport the beam box beam, the entire formwork structure is asymmetrical on the left and right, which brings inconvenience to the adjustment of the formwork, and at the same time, the space of the inner formwork and the inner formwork trolley is limited, resulting in a small demoulding space, affecting the construction efficiency.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a tall formwork for prefabricated variable-section segmental beams, comprising a tall formwork main body and an inner formwork trolley frame, outer formworks are arranged on both sides of the tall formwork main body, and an outer lower formwork is arranged below the outer formworks, an outer formwork support frame is connected below the outer formwork, and end formworks are respectively arranged at both ends of the tall formwork main body, the inner formwork trolley frame is inserted into the end formwork, and the inner formwork trolley frame is respectively provided with an inner upper formwork and an inner lower formwork above and below the inner cavity of the segmental beam, and a first inner formwork and a second inner formwork are respectively arranged on both sides of the inner upper formwork, a second inner movable formwork and a first inner movable formwork are respectively arranged between the inner lower formwork and the first inner formwork and the second inner formwork, and connecting axle pins are respectively passed through and fixed between the first inner movable formwork and the first inner formwork and the second inner movable formwork and the second inner formwork, and an upper hydraulic lifting mechanism, a first side demolding driving hydraulic cylinder, a second side demolding driving hydraulic cylinder and a lower hydraulic lifting mechanism are respectively installed between the inner upper formwork, the first inner formwork, the second inner formwork and the inner lower formwork and the inner formwork trolley frame.

[0006] Preferably, positioning plates are fixed on both sides of the inner mold platform frame by welding, and limiting holes are provided on the positioning plates at the same horizontal intervals.

[0007] Preferably, a limiting rod is movably inserted into each of the limiting holes, and the limiting rod is symmetrically and tiltedly arranged.

[0008] Preferably, a first inner mold stabilizing frame and a second inner mold stabilizing frame are welded and fixed to the inner sides of the first inner mold and the second inner mold, respectively, and one end of the limiting rod is welded and fixed to the first inner mold stabilizing frame and the second inner mold stabilizing frame at corresponding positions, respectively.

[0009] Preferably, a first auxiliary supporting hydraulic cylinder and a second auxiliary supporting hydraulic cylinder are rotatably mounted between the first inner mold stabilizing frame and the second inner mold stabilizing frame and the inner mold trolley frame, and the first auxiliary supporting hydraulic cylinder and the second auxiliary supporting hydraulic cylinder are also tilted.

[0010] Preferably, two sides of the inner upper template are respectively fastened and clamped with the first inner template and the second inner template, and two sides of the inner lower template are respectively fastened and clamped with the first inner movable template and the second inner movable template.

[0011] Preferably, a limit frame with a telescopic structure is screwed and fixed between the inner upper template and the inner lower template and the inner mold platform frame, and the limit frames are symmetrically located on both sides of the upper hydraulic lifting mechanism and the lower hydraulic lifting mechanism.

[0012] Preferably, a first lower demoulding hydraulic cylinder and a second lower demoulding hydraulic cylinder are obliquely installed between the fixed ends of the limit frames on both sides of the inner lower template and the first inner movable template and the second inner movable template, and the first lower demoulding hydraulic cylinder and the second lower demoulding hydraulic cylinder are rotatably installed at both ends through rotating shafts.

[0013] Preferably, the upper curved portions of the first inner formwork and the second inner formwork are respectively fixed with a first reinforcing angle plate and a second reinforcing angle plate by welding, and a reinforcing hydraulic cylinder is also installed at the curved portion of the second inner formwork.

[0014] Preferably, the first-side demoulding drive hydraulic cylinder and the second-side demoulding drive hydraulic cylinder are located between the limiting rod, and the limiting rod is inclined at the same angle to the first-side demoulding drive hydraulic cylinder and the second-side demoulding drive hydraulic cylinder on the same side.

[0015] Compared with the prior art, the invention has the following beneficial effects: the inner membrane plate of the tall formwork of the prefabricated variable-section segmental beam adopts a segmented support structure, which makes the inner formwork structure stable, and can automatically unfold and demould the formwork, avoiding the inner formwork affecting the construction efficiency due to insufficient operating space. When the tall formwork of the prefabricated variable-section segmental beam is applied to a double-chamber box beam, the inclination angle of the side formwork can be automatically adjusted as needed to meet the slope design requirements of the web plate, and the inner formworks interact with each other to achieve a tightening process, and the inner formworks can be demoulded in sequence during demoulding. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of a tall formwork structure of a prefabricated variable-section segmental beam of the present invention;

[0017] Figure 2 This is a schematic diagram of the inner formwork structure of a tall formwork for prefabricated variable-section segmental beams according to the present invention;

[0018] Figure 3 It is a schematic diagram of the inner formwork demoulding structure of a tall formwork for prefabricated variable-section segmental beams of the present invention;

[0019] Figure 4 A top view of the positions of a first inner template and a second inner template of a tall template for a prefabricated variable-section segmental beam according to the present invention relative to an inner upper template;

[0020] Figure 5 The present invention is a side view of the position of a positioning plate of a tall template for prefabricating variable-section segmental beams relative to an inner mold platform frame.

[0021] In the figure: 1. tall template body; 2. outer template; 201. outer template support frame; 3. end template; 4. inner mold trolley frame; 401. positioning plate; 402. limit rod; 403. limit hole; 5. inner upper template; 501. upper hydraulic lifting mechanism; 502. limit frame; 6. first inner template; 601. first inner mold stabilizing frame; 602. first side demoulding driving hydraulic cylinder; 603. first auxiliary support hydraulic cylinder; 604. second reinforcement angle plate ; 7. Second inner template; 701. Second inner template stabilizing frame; 702. Second side demoulding driving hydraulic cylinder; 703. Second auxiliary supporting hydraulic cylinder; 704. Reinforcement hydraulic cylinder; 705. First reinforcement angle plate; 8. First inner movable template; 801. First lower demoulding hydraulic cylinder; 9. Outer lower template; 10. Second inner movable template; 1001. Second lower demoulding hydraulic cylinder; 11. Inner lower template; 1101. Lower hydraulic lifting mechanism; 12. Connecting axle pin. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0023] See also Figure 1-5The present invention provides a technical solution: a tall formwork for prefabricating variable-section segmental beams, comprising a tall formwork body 1 and an inner formwork trolley frame 4, outer formworks 2 are arranged on both sides of the tall formwork body 1, and an outer lower formwork 9 is arranged below the outer formworks 2, an outer formwork support frame 201 is connected below the outer formwork 2, and end formworks 3 are also arranged at both ends of the tall formwork body 1, positioning plates 401 are fixed on both sides of the inner formwork trolley frame 4 by welding, and limiting holes 403 are arranged on the positioning plates 401 at the same horizontal intervals. The positioning plates 401 of this structure are positioned by the inner formwork trolley frame 4, which not only ensures the stability of the structure of the inner formwork trolley frame 4, but also enables the positioning plates 401 to play a positioning role through the limiting holes 403, and the limiting holes 403 are movable A limiting rod 402 is inserted, and the limiting rod 402 is symmetrically inclined. This structure allows the limiting rod 402 to move obliquely under the limitation of the limiting hole 403. The inner mold trolley frame 4 is inserted in the end template 3, and the inner mold trolley frame 4 is respectively provided with an inner upper template 5 and an inner lower template 11 above and below the inner cavity of the segment beam, and the inner upper template 5 is respectively provided with a first inner side template 6 and a second inner side template 7 on both sides. The first inner side template 6 and the second inner side template 7 are respectively welded and fixed with a first inner mold stabilizing frame 601 and a second inner mold stabilizing frame 701, and one end of the limiting rod 402 is respectively welded and fixed to the first inner mold stabilizing frame 601 and the second inner mold stabilizing frame 701 at the corresponding position. In this structure, the first inner mold stabilizing frame 601 The second inner mold stabilizing frame 701 is used for reinforcing the structure of the first inner mold 6 and the second inner mold 7 respectively. At the same time, the first inner mold 6 and the second inner mold 7 can be moved and demoulded under the limit of the limit rod 402. The first auxiliary supporting hydraulic cylinder 603 and the second auxiliary supporting hydraulic cylinder 703 are rotatably installed between the first inner mold stabilizing frame 601 and the second inner mold stabilizing frame 701 and the inner mold trolley frame 4, and the first auxiliary supporting hydraulic cylinder 603 and the second auxiliary supporting hydraulic cylinder 703 are also tilted. This structure can assist the support and stabilization of the first inner mold 6 and the second inner mold 7 through the first auxiliary supporting hydraulic cylinder 603 and the second auxiliary supporting hydraulic cylinder 703, so as to ensure the accuracy of the inner cavity size of the box beam. The first auxiliary supporting hydraulic cylinder 603 and the second auxiliary supporting hydraulic cylinder 703 are installed at both ends by rotation, so as to avoid hindering the movement of the first inner mold fixing frame 601 and the second inner mold fixing frame 701 relative to the inner mold trolley frame 4 during demoulding. The second inner movable template 10 and the first inner movable template 8 are respectively provided between the inner lower template 11 and the first inner template 6 and the second inner template 7, and connecting shaft pins 12 are respectively passed through and fixed between the first inner movable template 8 and the first inner template 6 and the second inner movable template 10 and the second inner template 7. The two sides of the inner upper template 5 are respectively fastened and clamped with the first inner template 6 and the second inner template 7, and the two sides of the inner lower template 11 are respectively fastened and clamped with the first inner movable template 8 and the second inner movable template 10.This structure allows the inner upper template 5 and the inner lower template 11 to be fastened to the inner templates on both sides respectively, ensuring reliable connection between the inner templates. At the same time, when performing demoulding, the inner upper template 5 and the inner lower template 11 are demoulded first, and then the first inner template 6, the first inner template 6, the first inner movable template 8 and the second inner movable template 10 can be demoulded. An upper hydraulic lifting mechanism 501, a first side demoulding driving hydraulic cylinder 602, a second side demoulding driving hydraulic cylinder 702 and a lower hydraulic lifting mechanism 1101 are respectively installed between the inner upper template 5, the first inner template 6, the second inner template 7 and the inner lower template 11 and the inner mold trolley frame 4. Telescopic The limit frame 502 of the structure is symmetrically located on both sides of the upper hydraulic lifting mechanism 501 and the lower hydraulic lifting mechanism 1101. The limit frame 502 of this structure is used to assist the reliable positioning of the inner upper template 5 and the inner lower template 11 relative to the inner mold trolley frame 4. The upper hydraulic lifting mechanism 501 and the lower hydraulic lifting mechanism 1101 are used for position adjustment and demoulding of the inner upper template 5 and the inner lower template 11 respectively. In the case of a double-chamber structure, the demoulding inconvenience caused by insufficient space can be avoided to ensure construction efficiency. The first lower demoulding hydraulic cylinder 801 and the second lower demoulding hydraulic cylinder 100 are also obliquely installed between the fixed end parts of the limit frames 502 on both sides of the inner lower template 11 and the first inner movable template 8 and the second inner movable template 10. 1, and the two ends of the first lower demoulding hydraulic cylinder 801 and the second lower demoulding hydraulic cylinder 1001 are respectively rotatably installed through a rotating shaft. This structure can be used for demoulding of the first inner movable template 8 and the second inner movable template 10 through the first lower demoulding hydraulic cylinder 801 and the second lower demoulding hydraulic cylinder 1001, respectively. By pulling the first inner movable template 8 and the second inner movable template 10 to move, the first inner movable template 8 and the second inner movable template 10 are respectively rotated relative to the second inner template 7 and the first inner template 6. The upper bending parts of the first inner template 6 and the second inner template 7 are respectively fixed with the first reinforcement angle plate 604 and the second reinforcement angle plate 705 by welding, and the bending part of the second inner template 7 is also equipped with a reinforcement hydraulic cylinder 7 04. The first reinforcing angle plate 604 and the second reinforcing angle plate 705 of this structure make the bending parts of the first inner formwork 6 and the second inner formwork 7 stable. The reinforcing hydraulic cylinder 704 is used to enhance the supporting force of the second inner formwork 7. When the prefabricated variable cross-section segment beam is a double-chamber structure, the second inner formwork 7 is located at the end position and needs to have a more reliable supporting force. The first side demoulding driving hydraulic cylinder 602 and the second side demoulding driving hydraulic cylinder 702 are located between the limiting rod 402, and the limiting rod 402 is inclined at the same angle as the first side demoulding driving hydraulic cylinder 602 and the second side demoulding driving hydraulic cylinder 702 on the same side. When the first side demoulding driving hydraulic cylinder 602 and the second side demoulding driving hydraulic cylinder 702 perform telescopic work,The first inner template 6 and the second inner template 7 can be moved obliquely downwards respectively, so as to facilitate demoulding of the inner mold.

[0024] Working principle: When using the tall formwork for prefabricating variable-section segmental beams, first, when prefabricating variable-section segmental beams in areas with large height changes, the tall formwork body 1 forms an outer formwork structure through the outer formwork 2, the end formwork 3 and the outer lower formwork 9, the outer formwork support frame 201 is used for reliable support of the outer formwork 2, and the inner formwork trolley frame 4 is used to position the inner formwork. When the inner formwork is unfolded, the first side demoulding driving hydraulic cylinder 602 and the second side demoulding driving hydraulic cylinder 702 are used to drive the first inner formwork 6 and the second inner formwork 7 on both sides to be inclined. Move upward, the limiting rod 402 moves on the positioning plate 401 through the limiting hole 403 to realize the movement limit of the first inner template 6 and the second inner template 7, the first auxiliary supporting hydraulic cylinder 603 and the second auxiliary supporting hydraulic cylinder 703 are respectively adapted to the movement of the first inner template 6 and the second inner template 7, and after the positions of the first inner template 6 and the second inner template 7 are adjusted, the first inner template stabilizing frame 601 and the second inner template stabilizing frame 701 are supported by the first auxiliary supporting hydraulic cylinder 603 and the second auxiliary supporting hydraulic cylinder 703 respectively, The second reinforcement angle plate 705 and the first reinforcement angle plate 604 are used for structural reinforcement of the second inner template 7 and the bending part of the first inner template 6 respectively. The reinforcement hydraulic cylinder 704 is used to increase the supporting force of the second inner template 7. Then, the first lower demoulding hydraulic cylinder 801 and the second lower demoulding hydraulic cylinder 1001 are used to adjust the angles of the first inner movable template 8 and the second inner movable template 10 respectively, so that the first inner movable template 8 and the second inner movable template 10 are rotated relative to the second inner template 7 and the first inner template 6 respectively through the connecting shaft pin 12. Finally, The upper inner template 5 and the lower inner template 11 are driven to move respectively by the upper hydraulic lifting mechanism 501 and the lower hydraulic lifting mechanism 1101. When the inner upper template 5 is engaged with the first inner template 6 and the second inner template 7, the reliability of the upper inner template is achieved. The inner lower template 11 is engaged with the first inner movable template 8 and the second inner movable template 10 to achieve the structural reliability of the lower inner template. The limit frame 502 is used for the structural reliability of the inner upper template 5 and the inner lower template 11. When demolding, the inner template can be automatically moved and demolded in reverse order, thereby completing a series of work.

[0025] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A tall formwork for prefabricating variable-section segmental beams, comprising a tall formwork body (1) and an inner formwork platform frame (4), characterized in that: The tall formwork body (1) is provided with outer formworks (2) on both sides, and an outer lower formwork (9) is provided below the outer formworks (2), an outer formwork support frame (201) is connected below the outer formworks (2), and end formworks (3) are provided at both ends of the tall formwork body (1), the inner formwork trolley frame (4) is inserted into the end formworks (3), and the inner formwork trolley frame (4) is provided with an inner upper formwork (5) and an inner lower formwork (11) above and below the inner cavity of the segment beam, respectively, and a first inner formwork (6) and a second inner formwork (7) are provided on both sides of the inner upper formwork (5), and the inner lower formwork (11) and the first inner formwork (6) are connected to each other. A second inner movable template (10) and a first inner movable template (8) are respectively provided between the first inner movable template (8) and the first inner template (6) and between the second inner movable template (10) and the second inner template (7), and a connecting shaft pin (12) is respectively passed through and fixed between the first inner movable template (8) and the first inner template (6) and between the second inner movable template (10) and the second inner template (7), and an upper hydraulic lifting mechanism (501), a first side demoulding driving hydraulic cylinder (602), a second side demoulding driving hydraulic cylinder (702) and a lower hydraulic lifting mechanism (1101) are respectively installed between the inner upper template (5), the first inner template (6), the second inner template (7) and the inner lower template (11) and the inner mold trolley frame (4).

2. A tall formwork for prefabricated variable cross-section segmental beams according to claim 1, characterized in that: Positioning plates (401) are fixed on both sides of the inner mold platform frame (4) by welding, and limiting holes (403) are provided on the positioning plates (401) at the same horizontal intervals.

3. A tall formwork for prefabricated variable cross-section segmental beams according to claim 2, characterized in that: The limiting holes (403) are each movably inserted with a limiting rod (402), and the limiting rod (402) is symmetrically and tiltedly arranged.

4. A tall formwork for prefabricated variable cross-section segmental beams according to claim 3, characterized in that: A first inner mold stabilizing frame (601) and a second inner mold stabilizing frame (701) are respectively welded and fixed to the inner sides of the first inner mold plate (6) and the second inner mold plate (7), and one end of the limiting rod (402) is respectively welded and fixed to the first inner mold stabilizing frame (601) and the second inner mold stabilizing frame (701) at corresponding positions.

5. A tall formwork for prefabricated variable cross-section segmental beams according to claim 4, characterized in that: A first auxiliary supporting hydraulic cylinder (603) and a second auxiliary supporting hydraulic cylinder (703) are rotatably mounted between the first inner mold stabilizing frame (601) and the second inner mold stabilizing frame (701) and the inner mold trolley frame (4), and the first auxiliary supporting hydraulic cylinder (603) and the second auxiliary supporting hydraulic cylinder (703) are also tilted.

6. The tall formwork for prefabricated variable cross-section segmental beams according to claim 1, characterized in that: The inner upper template (5) is fastened and clamped to the first inner template (6) and the second inner template (7) on both sides, and the inner lower template (11) is fastened and clamped to the first inner movable template (8) and the second inner movable template (10) on both sides.

7. The tall formwork for prefabricated variable cross-section segmental beams according to claim 1, characterized in that: A telescopic limit frame (502) is screwed and fixed between the inner upper mold plate (5) and the inner lower mold plate (11) and the inner mold trolley frame (4), and the limit frame (502) is symmetrically located on both sides of the upper hydraulic lifting mechanism (501) and the lower hydraulic lifting mechanism (1101).

8. A tall formwork for prefabricated variable cross-section segmental beams according to claim 7, characterized in that: A first lower demoulding hydraulic cylinder (801) and a second lower demoulding hydraulic cylinder (1001) are also obliquely installed between the fixed ends of the limiting frames (502) on both sides of the inner lower template (11) and the first inner movable template (8) and the second inner movable template (10), and the two ends of the first lower demoulding hydraulic cylinder (801) and the second lower demoulding hydraulic cylinder (1001) are rotatably installed respectively through a rotating shaft.

9. The tall formwork for prefabricated variable cross-section segmental beams according to claim 1, characterized in that: The upper curved portions of the first inner template (6) and the second inner template (7) are respectively fixed with a first reinforcing angle plate (604) and a second reinforcing angle plate (705) by welding, and a reinforcing hydraulic cylinder (704) is also installed at the curved portion of the second inner template (7).

10. The tall formwork for prefabricated variable cross-section segmental beams according to claim 1, characterized in that: The first side demoulding drive hydraulic cylinder (602) and the second side demoulding drive hydraulic cylinder (702) are located between the limiting rods (402), and the limiting rods (402) are inclined at the same angle as the first side demoulding drive hydraulic cylinder (602) and the second side demoulding drive hydraulic cylinder (702) on the same side.

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