Bridge cantilever pouring formwork with adjustable longitudinal and transverse slopes and installation method thereof

Abstract

The application relates to the technical field of beam construction, and discloses a bridge cantilever pouring formwork capable of adjusting longitudinal slope and transverse slope, which comprises a wing plate bottom die, a trapezoidal formwork and a rectangular formwork, the top wall of the rectangular formwork is fixedly connected with the bottom wall of the trapezoidal formwork, the top of the side wall of the trapezoidal formwork is attached to one side wall of the wing plate bottom die, the bottom end of the wing plate bottom die is connected with a plurality of triangular trusses, a plurality of rectangular trusses are fixedly installed on one side of the rectangular formwork, and a group of adjusting assemblies are arranged between the triangular trusses and the rectangular trusses; the height of the wing plate bottom die at each position can be adjusted through the adjusting assemblies, the pouring of the bridge cantilever with different longitudinal slopes and transverse slopes can be adapted, the whole truss can be adjusted, the height of the truss does not need to be adjusted through welding and cutting, the construction difficulty is reduced, and the construction convenience is improved.

Description

Technical Field

[0001] This invention relates to the field of bridge construction technology, specifically to an adjustable longitudinal and transverse slope bridge cantilever casting formwork and its installation method. Background Technology

[0002] Bridge cantilever casting formwork is a specialized formwork used in bridge construction. During bridge construction, due to the large span of the bridge, it is impossible to complete the entire pour in one go; a segmented pouring method is required. Cantilever casting formwork is designed to meet this construction need.

[0003] Chinese Patent CN115506269A discloses a box girder web formwork, relating to the technical field of box girder web formwork. The box girder includes a web and flanges. The formwork comprises a first formwork, a second formwork, and a third formwork. The first formwork is located on top of the third formwork, and the second formwork is located between the first and third formworks. The third formwork is fixedly mounted on one side of the web. The first formwork is fixed to the bottom surface of the flange, and its shape matches the shape of the bottom surface of the flange. The second formwork is fixedly mounted on one side of the web, and its top surface is fixed to the bottom surface of the first formwork. The top surface of the second formwork is a slope, and its inclination is consistent with the longitudinal slope of the box girder. This prevents the lower end of the third formwork from tilting due to changes in the longitudinal slope of the box girder, thus preventing the third formwork from interfering with the hanging basket crossbeams. This effectively reduces the number of formwork specifications and improves the versatility of the formwork. In this way, the problems of formwork tilting and conflict with hanging basket components are effectively solved.

[0004] The box girder web formwork is formed by setting three formworks to form the main body of the formwork. After the formwork is erected, trusses need to be installed under the flange to support the formwork. When pouring the bridge cantilever with a certain slope, the flange is set at an inclination, which makes the truss height different at different positions. The existing truss structure is fixed and can only be adjusted by cutting and welding, which is inconvenient to use.

[0005] Therefore, it is necessary to provide a bridge cantilever casting formwork with adjustable longitudinal and transverse slopes and its installation method to solve the above-mentioned technical problems. Summary of the Invention

[0006] The purpose of this invention is to provide a bridge cantilever casting formwork with adjustable longitudinal and transverse slopes and its installation method. The truss of this invention can be adjusted as a whole, without the need to adjust the height of the truss by welding or cutting, which reduces the difficulty of construction and improves the convenience of construction.

[0007] The above-mentioned technical objective of the present invention is achieved through the following technical solution: a bridge cantilever casting formwork with adjustable longitudinal and transverse slopes, comprising a wing plate bottom formwork, a trapezoidal formwork, and a rectangular formwork. The top wall of the rectangular formwork is fixedly connected to the bottom wall of the trapezoidal formwork, the top of the side wall of the trapezoidal formwork is attached to one side wall of the wing plate bottom formwork, multiple triangular trusses are connected to the bottom end of the wing plate bottom formwork, and multiple rectangular trusses are fixedly installed on one side of the rectangular formwork. An adjustment assembly is provided between each of the multiple triangular trusses and rectangular trusses.

[0008] A further feature of the present invention is that each set of adjustment components has three components, and the three adjustment components are distributed in a Z-shape.

[0009] A further configuration of the present invention is as follows: two first mounting seats are fixedly installed at the bottom of the triangular truss, two second mounting seats are fixedly installed at the top of the rectangular truss, the tops of the two adjustment components on both sides are fixedly connected to the two first mounting seats respectively, the bottoms of the two adjustment components on both sides are fixedly connected to the two second mounting seats respectively, the top of the inner adjustment component is hinged to one of the first mounting seats, the bottom of the inner adjustment component is hinged to one of the second mounting seats, the adjustment components on both sides are vertically arranged, and the inner adjustment component is inclined.

[0010] A further configuration of the present invention is as follows: the adjusting assembly includes an adjusting cylinder and two adjusting screws, each of the two adjusting screws having a connecting plate fixedly mounted at the end away from the adjusting cylinder, the connecting plate being connected to a first mounting base / second mounting base, the two adjusting screws having opposite thread directions, one end of each adjusting screw extending into the adjusting cylinder from the openings at both ends, and both adjusting screws being threadedly connected to the adjusting cylinder.

[0011] A further feature of the present invention is that a back rib plate is fixedly connected to one side of the bottom end of the wing plate bottom mold, and a slot is fixedly connected to one side of the rectangular template. The back rib plate is inserted into the slot, and the back rib plate and the slot are slidably engaged.

[0012] A further configuration of the present invention is as follows: Both sides of the adjusting cylinder are provided with through slots; two connecting blocks are provided inside the adjusting cylinder; a first connecting seat is rotatably mounted on each of the two connecting blocks; two connecting rods are hinged to the first connecting seat; a fixing ring is fitted into the middle of the adjusting cylinder; a fixing frame is fixedly mounted on both sides of the fixing ring; a second connecting seat is slidably mounted on the inner side of the fixing frame; one end of the connecting rod passes through the through slot and is hinged to the second connecting seat; an adjusting screw is rotatably mounted on both sides of the fixing ring; the adjusting screw passes through the second connecting seat and the fixing frame; the adjusting screw is threadedly connected to the second connecting seat; a rotating handle is fixedly mounted on one end of the adjusting screw; and the outer wall of the rotating handle is provided with protruding teeth.

[0013] A further feature of the present invention is that the connecting block is made of an elastic rubber material.

[0014] A further embodiment of the present invention is provided with a mounting shell on one side of the rotating handle, and a motor and a reducer are fixedly installed inside the mounting shell. The output end of the motor is drivenly connected to the input end of the reducer, and a connecting sleeve is drivenly connected to the output end of the reducer. The connecting sleeve engages with the rotating handle through a toothed protrusion. A grip is fixedly installed on one side of the mounting shell.

[0015] The above-mentioned method for installing adjustable longitudinal and transverse slope bridge cantilever casting formwork includes the following steps:

[0016] S1. Fix the rectangular formwork to the bridge pier using a rectangular truss, and fix the trapezoidal formwork to the top of the rectangular formwork;

[0017] S2. The triangular truss and the bottom mold of the wing plate are fixed to the top of the rectangular truss by adjusting the components, and the height and slope of the bottom mold of the wing plate are adjusted by adjusting the length of the adjusting components.

[0018] S3. After adjusting the longitudinal and transverse slopes, the trapezoidal template will be slightly higher than the bottom mold of the wing plate. Cut and grind the excess part so that the top wall of the trapezoidal template and the top wall of the bottom mold of the wing plate are in the same plane.

[0019] S4. Once all the formwork is secured, concrete can be poured.

[0020] In summary, the present invention has the following beneficial effects: By setting up rectangular and triangular trusses, the stability of the template is improved and the compressive strength is enhanced. By setting up trapezoidal templates, the pouring of bridge cantilever with a certain slope is realized. By setting up adjustment components, the height of the bottom formwork of the wing plate at each position can be adjusted, which can adapt to the pouring of bridge cantilever with different longitudinal and transverse slopes. The truss as a whole can be adjusted without the need to adjust the height of the truss by welding or cutting, which reduces the construction difficulty and improves the convenience of construction. Attached Figure Description

[0021] Figure 1 This is a three-dimensional structural diagram of Embodiment 1 of the present invention;

[0022] Figure 2 This is a three-dimensional structural diagram of the present invention in use;

[0023] Figure 3 This is a schematic diagram of the structure of the wing plate bottom mold, trapezoidal template, and rectangular template after disassembly according to the present invention;

[0024] Figure 4 For the present invention Figure 3 A magnified structural diagram at point A;

[0025] Figure 5 For the present invention Figure 3 A magnified structural diagram at point B;

[0026] Figure 6 This is a three-dimensional structural schematic diagram of the adjustment component of the present invention;

[0027] Figure 7 This is a schematic diagram of the adjustment component according to Embodiment 2 of the present invention;

[0028] Figure 8 This is a cross-sectional view of the adjustment component according to Embodiment 2 of the present invention;

[0029] Figure 9 This is a cross-sectional structural diagram of the mounting shell of the present invention.

[0030] In the diagram: 1. Wing plate bottom mold; 2. Trapezoidal template; 3. Rectangular template; 4. Adjustment assembly; 41. Adjustment cylinder; 4101. Through slot; 42. Adjustment screw; 43. Connecting plate; 5. Rectangular truss; 6. Triangular truss; 7. First mounting seat; 8. Back rib plate; 9. Slot; 10. Connecting block; 11. First connecting seat; 12. Connecting rod; 13. Second connecting seat; 14. Fixing ring; 15. Fixing frame; 16. Adjustment screw; 17. Rotary handle; 18. Wing plate; 19. Web plate; 20. Mounting shell; 21. Connecting sleeve; 22. Motor; 23. Reducer; 24. Handle; 25. Second mounting seat. Detailed Implementation

[0031] The present invention will be further described below with reference to the accompanying drawings in the embodiments of the present invention.

[0032] Example 1:

[0033] Please see Figures 1-6In this embodiment of the invention, a bridge cantilever casting template with adjustable longitudinal and transverse slopes includes a wing plate bottom mold 1, a trapezoidal template 2, and a rectangular template 3. The top wall of the rectangular template 3 is fixedly connected to the bottom wall of the trapezoidal template 2. The top of the side wall of the trapezoidal template 2 is attached to one side wall of the wing plate bottom mold 1. The top wall of the trapezoidal template 2 and the top wall of the wing plate bottom mold 1 are located in the same plane. Multiple triangular trusses 6 are connected to the bottom end of the wing plate bottom mold 1. Multiple rectangular trusses 5 are fixedly installed on one side of the rectangular template 3. An adjustment assembly 4 is provided between each of the multiple triangular trusses 6 and the rectangular trusses 5. When constructing the template, the rectangular template 3 is first fixed to the bridge pier using the rectangular trusses 5. Then, the trapezoidal template 2 is fixed to the top of the rectangular template 3. Finally, the triangular trusses 6 and the wing plate bottom mold 1 are fixed to the top of the rectangular trusses 5 using the adjustment assembly 4. The length of the control and adjustment component 4 is used to adjust the height and slope of the wing plate bottom formwork 1. After adjusting the longitudinal and transverse slopes, the trapezoidal formwork 2 will be slightly higher than the wing plate bottom formwork 1. The excess part is cut and ground so that the top wall of the trapezoidal formwork 2 and the top wall of the wing plate bottom formwork 1 are in the same plane. After fixing all the formwork, concrete can be poured after the reinforcement and formwork have passed the acceptance inspection. The setting of rectangular truss 5 and triangular truss 6 improves the stability of the formwork and enhances its compressive strength. The setting of trapezoidal formwork 2 enables the pouring of bridge cantilever with a certain slope. The setting of adjustment component 4 allows the height of the wing plate bottom formwork 1 at each position to be adjusted, which can adapt to the pouring of bridge cantilever with different longitudinal and transverse slopes. The truss as a whole can be adjusted without the need to adjust the height of the truss by welding or cutting, which reduces the construction difficulty and improves the convenience of construction.

[0034] In this embodiment, preferably, each set of adjustment components 4 is provided with three components, and the three adjustment components 4 are distributed in a Z-shape to share the load.

[0035] In this embodiment, preferably, two first mounting seats 7 are fixedly installed at the bottom of the triangular truss 6, and two second mounting seats 25 are fixedly installed at the top of the rectangular truss 5. The tops of the two adjustment components 4 on both sides are fixedly connected to the two first mounting seats 7 respectively, and the bottoms of the two adjustment components 4 on both sides are fixedly connected to the two second mounting seats 25 respectively. The top of the inner adjustment component 4 is hinged to one of the first mounting seats 7, and the bottom of the inner adjustment component 4 is hinged to one of the second mounting seats 25. The adjustment components 4 on both sides are vertically arranged, and the inner adjustment component 4 is inclined.

[0036] In this embodiment, preferably, the adjusting assembly 4 includes an adjusting cylinder 41 and two adjusting screws 42. A connecting plate 43 is fixedly installed at the end of each adjusting screw 42 away from the adjusting cylinder 41. The connecting plate 43 is connected to the first mounting base 7 / second mounting base 25. The threads of the two adjusting screws 42 are in opposite directions. One end of each adjusting screw 42 extends into the adjusting cylinder 41 from its two end openings, and both adjusting screws 42 are threadedly connected to the adjusting cylinder 41. When it is necessary to adjust the distance between the triangular truss 6 and the rectangular truss 5, the adjusting cylinder 41 is rotated. Rotation of the adjusting cylinder 41 causes the two adjusting screws 42 to move in opposite directions, thereby changing the length of the adjusting assembly 4.

[0037] It should be noted that the angle between the wing plate bottom formwork 1 and the triangular truss 6 can be adjusted according to actual construction needs. Considering that it is difficult to adjust all of them with adjusting screws 42, except for the first and last adjusting components 4, the middle adjusting components 4 can be replaced by ordinary steel pipes with adjusting screws 42. When adjusting the height, only the first and last adjusting components 4 need to be adjusted. The middle adjusting components 4 should be loosened first. After the height of the first and last adjusting components 4 is adjusted, the middle adjusting components 4 can be tightened. After the pouring is completed, the wing plate 18 fits with the wing plate bottom formwork 1, and the side wall of the web plate 19 fits with the rectangular formwork 3 and the trapezoidal formwork 2.

[0038] In this embodiment, preferably, a back rib plate 8 is fixedly connected to one side of the bottom end of the wing plate bottom mold 1, and a slot 9 is fixedly connected to one side of the rectangular template 3. The back rib plate 8 is inserted into the slot 9, and the back rib plate 8 and the slot 9 are slidably engaged. During installation, inserting the back rib plate 8 into the slot 9 can improve the firmness of the wing plate bottom mold 1 and enhance the lateral load capacity of the wing plate bottom mold 1.

[0039] This invention also discloses a method for installing adjustable longitudinal and transverse slope bridge cantilever casting formwork, comprising the following steps:

[0040] S1. The rectangular template 3 is fixed to the bridge pier by the rectangular truss 5, and the trapezoidal template 2 is fixed to the top of the rectangular template 3;

[0041] S2. The triangular truss 6 and the wing plate bottom mold 1 are fixed to the top of the rectangular truss 5 by adjusting component 4, and the height and slope of the wing plate bottom mold 1 are adjusted by adjusting the length of adjusting component 4.

[0042] S3. After adjusting the longitudinal and transverse slopes, the trapezoidal template 2 will be slightly higher than the wing plate bottom mold 1. The higher part will be cut and polished so that the top wall of the trapezoidal template 2 and the top wall of the wing plate bottom mold 1 are in the same plane.

[0043] S4. Once all the formwork is secured, concrete can be poured.

[0044] Example 2:

[0045] When dismantling the formwork after pouring, the length of the adjusting component 4 needs to be shortened to facilitate the dismantling of the wing plate bottom mold 1. After the formwork is installed, it may also be necessary to fine-tune the height of the wing plate bottom mold 1. At this time, due to the weight of the wing plate bottom mold 1 itself, the adjusting component 4 is subjected to greater pressure, which makes the longitudinal pressure of the adjusting screw 42 on the internal thread groove of the adjusting cylinder 41 greater. This increases the friction between the adjusting screw 42 and the internal thread groove of the adjusting cylinder 41, making it more difficult to rotate the adjusting cylinder 41, especially after the equipment has been used for a long time and has rust. Therefore, this embodiment is set up.

[0046] Please see Figures 7-9In this embodiment of the invention, the adjusting cylinder 41 has through slots 4101 on both sides. Two connecting blocks 10 are disposed inside the adjusting cylinder 41. The connecting blocks 10 are made of elastic rubber material, giving them a certain degree of elasticity to ensure that the adjusting screw 42 has a certain amount of room to move when the connecting blocks 10 are pressed against it. A first connecting seat 11 is rotatably mounted on each of the two connecting blocks 10. Two connecting rods 12 are hinged to the first connecting seat 11. A fixing ring 14 is fitted into the middle of the adjusting cylinder 41. A fixing bracket 15 is fixedly installed on both sides of the fixing ring 14. A second connecting seat 13 is slidably arranged on the inner side of the fixing bracket 15. One end of the connecting rod 12 passes through the through groove 4101 and is hinged to the second connecting seat 13. An adjusting screw 16 is rotatably installed on both sides of the fixing ring 14. The adjusting screw 16 passes through the second connecting seat 13 and the fixing bracket 15. The adjusting screw 16 is threadedly connected to the second connecting seat 13 and rotatably connected to the fixing bracket 15. A screw is fixedly installed on one end of the adjusting screw 16. The handle 17 has teeth on its outer wall. When adjusting the length of the adjustment component 4, the handle 17 is first rotated. This rotation drives the adjusting screw 16 to rotate, which in turn moves the second connecting seat 13 toward the adjusting cylinder 41. The second connecting seat 13, via the connecting rod 12, moves the two connecting blocks 10 toward the two adjusting screws 42, causing them to engage with the two adjusting screws 42. This allows the pressure of the adjusting screws 42 on the adjusting cylinder 41 to be released. A large portion of the friction is distributed to the connecting block 10 and the connecting rod 12, reducing the friction between the adjusting screw 42 and the adjusting cylinder 41. Then, the rotation handle 17 can be controlled to revolve, thereby driving the adjusting cylinder 41 to revolve through the fixed frame 15 and the fixed ring 14. This causes the two adjusting screws 42 to move in opposite directions. It should be noted that the rotation and revolution of the rotating handle 17 need to be carried out simultaneously so that the movement of the adjusting screw 42 and the movement of the connecting block 10 can be synchronized. Through the above structure, the length adjustment of the adjusting component 4 is made more labor-saving and convenient.

[0047] In this embodiment, preferably, a mounting shell 20 is provided on one side of the rotating handle 17. A motor 22 and a reducer 23 are fixedly installed inside the mounting shell 20. The output end of the motor 22 is connected to the input end of the reducer 23. A connecting sleeve 21 is connected to the output end of the reducer 23. The connecting sleeve 21 engages with the rotating handle 17 via protruding teeth. A grip 24 is fixedly installed on one side of the mounting shell 20. When rotating the adjusting cylinder 41, the rotating handle 17 needs to be rotated at each certain angle to move the two connecting blocks 10 away from each other, so that the two connecting blocks... The connecting block 10 and the connecting rod provide support, but it is difficult to operate because the rotation handle 17 needs to be rotated while simultaneously controlling its rotation. With the above structure, the connecting sleeve 21 is connected to the rotation handle 17 during adjustment, and the rotation handle 17 is driven to rotate by the handle 24. The rotation handle 17 is driven to rotate by the motor 22 and the reducer 23, making the rotation of the adjusting cylinder 41 more effortless and convenient. It should be noted that the connecting sleeve 21 and the rotation handle 17 are separable. This part of the structure can be disassembled for use and does not need to be equipped on each rotation handle 17, thus reducing costs.

[0048] The above description is only a preferred embodiment of the present invention. Therefore, all equivalent changes or modifications made to the structure, features and principles described in the claims of this patent application are included in the scope of this patent application.

Claims

1. A bridge cantilever casting formwork with adjustable longitudinal and transverse slopes, comprising a wing plate bottom formwork (1), a trapezoidal formwork (2), and a rectangular formwork (3), characterized in that: The top wall of the rectangular template (3) is fixedly connected to the bottom wall of the trapezoidal template (2). The top of the side wall of the trapezoidal template (2) is attached to one side wall of the wing plate bottom mold (1). Multiple triangular trusses (6) are connected to the bottom end of the wing plate bottom mold (1). Multiple rectangular trusses (5) are fixedly installed on one side of the rectangular template (3). A set of adjustment components (4) is provided between the multiple triangular trusses (6) and the rectangular trusses (5). The bottom of the triangular truss (6) is fixedly installed with two first mounting seats (7), the top of the rectangular truss (5) is fixedly installed with two second mounting seats (25), the tops of the two adjustment components (4) on both sides are fixedly connected to the two first mounting seats (7) respectively, the bottoms of the two adjustment components (4) on both sides are fixedly connected to the two second mounting seats (25) respectively, the top of the inner adjustment component (4) is hinged to one of the first mounting seats (7), the bottom of the inner adjustment component (4) is hinged to one of the second mounting seats (25), the adjustment components (4) on both sides are vertically arranged, and the inner adjustment component (4) is inclined. The adjustment assembly (4) includes an adjustment cylinder (41) and two adjustment screws (42). A connecting plate (43) is fixedly installed at the end of each of the two adjustment screws (42) away from the adjustment cylinder (41). The connecting plate (43) is connected to the first mounting seat (7) / second mounting seat (25). The threads of the two adjustment screws (42) are opposite. One end of each adjustment screw (42) extends into the interior of the adjustment cylinder (41) from the openings at both ends, and both adjustment screws (42) are threadedly connected to the adjustment cylinder (41). Both sides of the adjusting cylinder (41) are provided with through slots (4101). Two connecting blocks (10) are provided inside the adjusting cylinder (41). A first connecting seat (11) is rotatably installed on each of the two connecting blocks (10). Two connecting rods (12) are hinged on the first connecting seat (11). A fixing ring (14) is fitted in the middle of the adjusting cylinder (41). Fixing brackets (15) are fixedly installed on both sides of the fixing ring (14). A second connecting rod is slidably arranged on the inner side of the fixing bracket (15). The connecting seat (13) has one end of the connecting rod (12) passing through the through groove (4101) and hinged to the second connecting seat (13). Adjusting screws (16) are rotatably installed on both sides of the fixing ring (14). The adjusting screws (16) pass through the second connecting seat (13) and the fixing frame (15). The adjusting screws (16) are threadedly connected to the second connecting seat (13). A rotating handle (17) is fixedly installed on one end of the adjusting screws (16). The outer wall of the rotating handle (17) is provided with protruding teeth.

2. The adjustable longitudinal and transverse slope bridge cantilever casting formwork according to claim 1, characterized in that: Each set of adjustment components (4) has three components, and the three adjustment components (4) are arranged in a Z-shape.

3. The adjustable longitudinal and transverse slope bridge cantilever casting formwork according to claim 1, characterized in that: A back rib plate (8) is fixedly connected to one side of the bottom end of the wing plate bottom mold (1), and a slot (9) is fixedly connected to one side of the rectangular template (3). The back rib plate (8) is inserted into the slot (9), and the back rib plate (8) and the slot (9) slide together.

4. The adjustable longitudinal and transverse slope bridge cantilever casting formwork according to claim 1, characterized in that: The connecting block (10) is made of elastic rubber material.

5. The adjustable longitudinal and transverse slope bridge cantilever casting formwork according to claim 1, characterized in that: A mounting shell (20) is provided on one side of the rotating handle (17). A motor (22) and a reducer (23) are fixedly installed inside the mounting shell (20). The output end of the motor (22) is connected to the input end of the reducer (23). A connecting sleeve (21) is connected to the output end of the reducer (23). The connecting sleeve (21) meshes with the rotating handle (17) through a tooth. A grip (24) is fixedly installed on one side of the mounting shell (20).

6. A method for installing a bridge cantilever casting formwork with adjustable longitudinal and transverse slopes as described in any one of claims 1-5, characterized in that, Includes the following steps: S1. The rectangular template (3) is fixed to the bridge pier by a rectangular truss (5), and the trapezoidal template (2) is fixed to the top of the rectangular template (3); S2. The triangular truss (6) and the wing plate bottom mold (1) are fixed to the top of the rectangular truss (5) by adjusting the component (4), and the height and slope of the wing plate bottom mold (1) are adjusted by adjusting the length of the adjusting component (4); S3. After adjusting the longitudinal slope and transverse slope, the trapezoidal template (2) will be slightly higher than the wing plate bottom mold (1). Cut and grind the higher part so that the top wall of the trapezoidal template (2) and the top wall of the wing plate bottom mold (1) are in the same plane. S4. Once all the formwork is secured, concrete can be poured.

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